The article was a fun read but it was very high level and left me with questions about how the incentives for founders, investors, customers, and the employees change in this new world (i.e. when governance is provided by the community versus the company). For example, if you compare the company Facebook to a NewCo like a steemit.
I listed my assumptions in the table below after reading the article. It would be great for this community to help contrast the changes between models (I also posted this article on steemit and I’m spending some time learning the platform as well as the new crypto/blockchain models that have momentum).
Please comment on what is right/wrong or needs to be better articulated in the table below…
Facebook (Governance provided by the Company)
NewCo’s (Governance provided by the Community)
Founders invest time and $ upfront and are rewarded by pay in $ and exit (sale or IPO) in $ of shares they own
Founders invest time and $ upfront and are rewarded by pay in $ from ICO/STO and from an increase in the token price of held back tokens which are eventually sold for $
Note: Founders hold back tokens that they personally own that are valued and can be sold on an exchange for $ once vested
Change= Founders can sell tokens for $ once tokens vest versus at exit or IPO
Risk: From day 1 the company is public which comes with a great deal of overhead; Founders can also cash out once vested.
Investors buy shares or debt in company in series A, B, C etc for $ and get rewarded by increased share price (over time) which in turn is sold for $ upon exit
Investors buy tokens (example: STEEM, SP or SBD) in company at any time for $ and get rewarded by increased token price or interest on debt (ex:SBD)which in turn is sold for $
Change = Investors buy tokens at any time versus shares in the company
Company provides proprietary service at no-cost and sells advertising and get rewarded with $Change = Company gives proprietary service away for free versus an old school MSFT model where proprietary software is sold for $
Company provides open-source service at no-cost and sell nothing and get no reward (other than token appreciation in the market)
Note: Company holds back tokens from market to be sold for $ and used to run company
Change = Company sells nothing
Change = Company reward is 0
Employees help company make proprietary service; sell advertising and get rewarded with $
Employees help make & sell open-source service and get rewarded with pay ($ from held back tokens); Community helps company make open-source service and gets rewarded with tokens which can be sold for $
Change=Community helps develop open-source code
Customers get proprietary service and pay with their data and get rewarded with value
Customers get open-source service and pay with activity and get rewarded with value and tokens which they can sell for $
What others report:
> From TechCrunch: Tokens (versus options) can better incentivize startup employees than equity “One of the largest differences between tokens and equity is that tokens are immediately liquid, assuming that they have already been listed on an exchange.”–however, as commenters to the article point out easy liquidity for employees can be bad for a startup. It can also cause tax issues for the employees.
> From CoinDesk: The Biggest Problem for ICOs? In 2018, It Was Their Own Investors” Instead of treating individuals who make early contributions as merely financial investors, projects that are truly pursuing decentralization should recognize them as more akin to employees who receive stock options (and can actively contribute to the network from outside the organization) and adopt a philosophy of ‘compensation through the protocol’ to leverage them.” — ‘Proof of Contribution’
This is an update to my notes from last July (foundhere). Update since: By the time the summer ended the city had cleaned up the graffiti and fixed several of the sidewalks—great job! However, there are still issues to discuss such as the retail vacancies.
I attended the “The Future of Georgetown” meeting on 1/15/19
hosted by the amazing Citizens of Georgetown (CAG) group and spectacular Advisory Neighborhood Commission (ANC 2E) but came away a bit disappointed with what the Georgetown Business
Improvement District (BID) presented as the areas future of retail.
The BID spent 30 minutes of the presentation on why it’s so hard to have a good retail ecosystem in Georgetown (i.e. Amazon, unrealistic landlords/rents, awkward spaces in old buildings) and how many retailers are going out of business. They also painted a picture on why it’s not as bad as it looks –even though I counted 19 vacancies when I walked down Wisconsin Ave to get to the meeting. …but what really got to me was at the end of their presentation they said that this is all part of a cycle and Georgetown’s business district will still be here when other locations fail—and that’s just not a good way to manage the area’s future (i.e. telling people to wait and have hope). I personally don’t think this is a cycle—retail as we have known it is dying and if we don’t have a well thought out strategy for how to grow with these changes then the business district will die a slow death and Georgetown will no longer be the tourist destination or the exciting place to live that it is currently.
Don’t get me wrong, this is a wonderful community (in a remarkable city) with a beautiful waterfront and a great plan for the canal (being done by the same team that did NYC High Line)—but we need a better plan for our diminishing retail market than wait for the cycle to rebound. This 2028 strategic plan is good and the update speaks volumes but we need to have a more thoughtful discussion about the Georgetown retail problem (everything needs to be on the table—policy, zoning, investment etc.).
I don’t disagree with anything the BID laid out in regards to our challenges (most big city retail communities are facing the same issues) but what the presentation made me think is that the ‘Free Market’ is not working for Georgetown’s retail district if online commerce is hurting it, absent/uncaring landlords are leaving spaces vacant for years and the city infrastructure is not desirable because it’s old/lacks parking & a metro—and when the free market doesn’t work policymakers need to get involved. I didn’t see any policy ‘makers’ (Jack-Ward 2, Kenyan-Chair Committee on Bus & Economic Dev) at the meeting but I may have missed them—however I would not have expected them at the meeting as the ANC had it covered very well and that is our voice to the policy makers–and they did ask for our feedback (hence this update)!
What I hear from the community is that Georgetown visitors and locals want great restaurants, art & entertainment, shopping, and experiences—but most importantly they want Georgetown to stay relevant to the world as a brand destination and a great place to live. The ANC asked for feedback and ideas:
Maybe to ensure Georgetown
stays relevant we could:
Make it harder for landlords to leave storefronts vacant via new legislative policies (examples & risks).
Create income tax abatements for commercial building rehab or new development (example from Falls Church VA).
Ring-fence grant funding for the types of businesses we want to attract (maybe extend this program to include M Street and understand if it worked for Wisconsin and push to increase funding).
This holiday season I talked to several people with different opinions from my own. I met a young 20-year-old woman that said she would never bring kids into this world because global warming meant we have no future… I chatted at a party with a Trump supporter that was convinced tariffs were good policy. I listened to a young person (under 18) tell me that Socialism was indeed better than Capitalism. I’m not saying any of these opinions were wrong but I did notice that NONE of them were based on a broad set of knowledge—they were all drawn from a few headlines, things they heard or opinions they created themselves based on their belief system. You might say that this has been going on since the beginning of humanity (people formulating strong opinions without a lot of facts)—but it seems much more pronounced now. (As you will read below this might be due to me having a slight Negativity Bias.)
I get it, we are human, and we have innate flaws that allow us to be influenced –but how and why? I thought it was time to do some digging, take some notes, and begin a list of all the ways I could be manipulated so I can defend against it in the future.
Political ads, search and social media advertising, partisan cable TV and fake news content is constantly being pushed at all of us–While product designers create products that cause addictive behavior to distribute such content. Design engineers read books like Hooked: How to Build Habit-Forming Products to understand how to build products & services that we have to constantly check for a little boost of dopamine. In the past, this wasn’t as big of an issue because the portals for distributing content were not as widely used (as our smartphones are today) for such a large part of the day and their influence was not as personalized (more on how much just a couple tech firms knows about you found here).
To understand how we are being manipulated we need to understand one of our many glitches–Bias.
Everyone is susceptible to some
form of Bias
The first thing I’d ask is why less than 60% of the general public believe human activities are a significant contributing factor in climate change when >95% of the scientists that study climate change for a living (PHDs) are adamant about the fact. Think about this for a second–These specialists have studied climate for their entire professional careers, yet a large majority of people that NEVER studied the climate don’t believe them—that’s just crazy! Are these non-believers’ lives impacted negatively by climate change policy? Are these non-believers’ drawing conclusions based on how much snow they saw in their backyard this past winter? Take this a step further—these non-believers are voters and 40% is a lot of people (more on a related subject). Reference this video about bias and climate change:
Most (if not all) people have a “bias blind spot”. Humans are less likely to detect bias in themselves than in others per published research in Management Science. The reality is that people are susceptible to all kinds of bias (defined as a mental leaning or inclination; partiality; prejudice; bent).
We love to agree with people that agree with us—This is called confirmation bias. To compensate we should surround ourselves with a diverse set of people that have different backgrounds and experience than your own.
We jump to conclusions without having a lot of information – This is called Anchoring Bias. To compensate we can draw upon tools such as the Ladder of Inference to help us make decisions.
We may believe that after flipping a coin 5 times and getting heads all 5 times that there is an increased likelihood that the next coin toss will be tails and the odd would be in our favor. They are not. This is called Positive Expectation Bias and forms the basis of gambling addictions. To compensate, we need to look at trends from a number of angles versus just chronologically.
We blame others when something goes wrong. Perhaps blaming the other driver for being a ‘bad driver’ in a traffic accident versus blaming the weather. This is an Attribution Bias. To compensate we need to look at others as people and use empathy versus treating them as objects (use tools like Arbinger Institutes Leadership and Self Deception framework).
We overlook faults or defects with a large purchase of an expensive product or service in order to justify the purchase – this is a form of cognitive bias called Buyer’s Stockholm Syndrome
We might despise the opposing political party. Negative feelings towards another group form from favoritism towards one’s own group – This is called Ingroup bias and forms the basis of discrimination.
The human brain is easily deceived, and we have to be diligent in not letting others manipulate us because of its natural bias. After all, marketing professionals have been exploiting these fundamental human flaws for years. Here is a great article outlining how titled “How marketers use 20 cognitive biases that screw up your decisions” by Paul Marsden.
We must constantly ask ourselves if our personal bias is making us draw conclusions without all the data… have we listened to the other side? Do we have empathy for the people on the other side of the dialog or are they ‘objects’ to us? Are we only listening to news that confirms our personal bias? Are we being manipulated or are we thinking about all sides of an argument? –don’t be the nitwit that doesn’t believe in global warming when >95% of all climate scientists (who spent their entire careers studying the issue) believe humans are at fault.
We are vulnerable to The Sleeper Effect
This was first identified in U.S. soldiers during World War II. Scientists measured a soldier’s opinions 5 days and 9 weeks after they were shown a movie of propaganda. They found that the difference in opinions of those who had observed the movie and those who did not watch the movie were greater 9 weeks after viewing it than 5 days. This leads us to believe that our impressions have more influence on us than rational thinking over time. Maybe this is why drug companies place disclaimers at the end of a commercial because we won’t remember them over time. Could this be why the older generation wants to Make America Great Again…
Some are vulnerable to Group Think
The brain is always looking for approval from other people
and this can be perverted in all kinds of unsettling ways. Our brains prioritize
‘being liked’ over ‘being right.’ so people will go along with a crowd and
engage in activities they would never pursue by themselves for the sake of
fitting in. Terrorism is a great example—it
occurs when ‘group think’ morphs into ‘group polarization’. For more on this subject
there is a great study in the Journal of Social and Political Psychology titled
Perspectives on Trump Supporters”.
Some are vulnerable to Cognitive Dissonance
Not knowing things makes humans
anxious. When we are not given adequate closure, we fill in the gaps to create
a cohesive whole that makes sense to us. It’s why some of us believe in heaven,
astrology, or ghosts. Humans fear the unknown, and intrinsically combat this
angst by supplementing our limited information with things that fit a
particular paradigm. It’s why we create religions and subscribe to them to our
death to give us answers to life’s complex questions.
“When a thousand people believe some made-up story for a month — that’s fake news. When a billion people believe it for a thousand years — that’s a religion,”- Yuval Noah Harari.
Most may be susceptible to some level of hypnotism
I know… this sounds farfetched but it’s not. We know the result of hypnosis is real—but we don’t understand how it works.
“Follow the Lord!” says the priest. “Defeat the Enemy!” says the politician. “Place your Order within the next Ten Minutes for Double the Benefit!” says the sales person. These are all examples of mass hypnosis—used just the same way that Stalin and Hitler practiced it. Manipulating emotions is a way to seize control over someone’s body and mind. The more we understand our subconscious mind, the greater our ability to make rational decisions.
Hypnosis is generally
regarded as an altered state of consciousness—but since consciousness isn’t
understood, alterations to it such as hypnosis, meditation and psychosis aren’t
very well understood either. David Spiegel M.D. does a great job explaining what
is known about hypnosis in this 9 chapter lecture titled “Tranceformation:
Hypnosis in Brain and Body” found on NIH.gov.
Someone can learn how susceptible they are to hypnosis here.
A person’s intelligence is not set in
genetic stone—Here are some ideas on how to
It may be in our genes
Bradley B. Doll, Kent E.
Hutchison and Michael J. Frank published a paper in The Journal of Neuroscience
Genes Predict Individual Differences in Susceptibility to Confirmation Bias”
that suggested that variants in the genes involved in the prefrontal dopaminergic
reward system predicted the degree to which study volunteers persisted in
responding to a test, following previous instructions, even as evidence against
the veracity of the instructions accumulated. In contrast, variants in genes
associated with dopamine function in the striatum correlated with the ability
to learn from actual experience.
Conclusion: We are not flawed, we are human. The key is to understand how our brains work and to defending against others that try to exploit our human design.
I just started reading Ray Dalio’s new book “Principles For Navigating BIG DEBT CRISES” and I decided to ask my money manager about his thoughts on some of the concepts in the book. My first question was what he thought about the USA’s National Debt situation and if it was going to have an impact on the future economy/stock market. His answer, “it’s been an issue for years and if you worried about it you would have never made any returns.” He pontificated about a few other charming variables but for a guy that likes more detail, it was NOT a great answer—so let’s start digging and taking some notes. Ray’s book makes some assumptions that the reader understands these concepts so it’s good to do a review as I forgot most of what I learned in high school finance (wait, they didn’t teach finance in my high school–well, they should…).
We must start with the basics: What is credit, trust, spending power, and debt?
Debt is money a borrower owes in the future to a lender. Credit is the trust which allows a lender to provide money to a borrower where that borrower repays the money (and usually interest) at a later date. Credit creates both spending power and debt. The key is to use the borrowed money productively to generate enough income to pay back the debt.
The national debt of the United States is the funds that the
country borrowed (via selling securities issued by federal government agencies
such as the Treasury). If the federal government runs a “deficit” (spends
more than it takes in) the country has to borrow to cover the delta and this increases
You can find details here but ~28% of the debt is held by intra-governmental agencies and the rest (public debt) is held by foreign governments other governmental entities (Federal Reserve and state and local governments), mutual funds, private pension funds, holders of savings bonds and Treasury notes, banks, insurance companies, trusts, companies, and investors.
Note that the US published National Debt number does NOT include Medicare, Medicaid and Social Security—these are considered “unfunded obligations”. It’s estimated that the US has between $47 Trillion and $210 Trillion of unfunded obligations (here or here).
A debt-to-GDP ratio under 100% simply indicates that the
economy produces and sells goods and services enough to pay back debts without
incurring further debt. Here is a chart that shows this % since 1900 –note that
we were over 100% around the time of World War II. The current ratio is~106%
How does the USA’s debt-to-GDP ratio compare to other countries?
You can find a chart comparing all countries here. If you take all the countries around the world
and sort them by the % highest to lowest you will see the following:
How do we stack up if you include unfunded obligations in our numerator?
So, what’s the problem?
Borrowing is OK if it allows for development. However, if the return on the loan is such that it doesn’t produce enough to repay the loan then we are essentially bankrupt. We see above that for several recent years the US has been borrowing from its future. How much is too much?
By the end of the 20th century, the United States dollar
(USD) was considered the world’s most dominant reserve currency. Most countries
hold most of their reserves in USD. Why? It’s because the United States has:
large, liquid financial markets capable of taking huge investments
a reputation for safety and rule of law, so that other countries are willing to invest billions and billions of dollars in that country’s government securities
a willingness to run current account deficits indefinitely since that’s the counterpart of a capital account surplus.
Being a dominant
reserve currency causes the country’s currency to appreciate due to foreign
demand. This then dampens growth, and it
causes unemployment (US exports would be more competitive, and more people in
the US would have jobs making goods for exports).
The fact that the
USD is the world’s major reserve currency is one of the main reasons why it has
run a current account deficit for most of the last 30 years. (known
as the Triffin dilemma).
So, what are the benefits of being the country with the
dominant reserve currency? From
Michael Pettis in 2016 “it isn’t easy
to list these benefits because for all the conviction that they are
substantial, few analysts can identify them except very vaguely. The main
benefits seem to include:
It lowers US government borrowing
It allows Americans to consume beyond
Outstanding currency notes provide
The US sells economic insurance.”
Others are pointing out that the debt will cause the US to lose it’s reserve currency status and it has already started (see here). Others refute that it will happen (more) – “the US dollar will continue to be the dominant reserve currency for the next several decades unless the US government itself decides to prevent or limit the ability of foreign central to accumulate reserves in US dollars”.
Take the following propaganda with MAJOR CAUTION GIVEN THE SOURCE but if you want to see a very negative view of the US debt situation from the RUSSIAN accounting firm Awara read “An Awara Accounting Study on US Economy 2018: Signs that the US Debt-Fueled Economy Might Actually Collapse” found here. “it is clear that the present US economic system will not survive over the coming 5 to 10 years. Massive changes in the economic model would have to be undertaken either in an organized fashion (hardly imaginable) or through a mega financial crisis.”
One of the best debates that leans toward the US debt NOT having a big impact on the future economy can be found here at a podcast that I enjoy called: Money for the rest of us
Net/Net: It’s really hard to tell when/if the US National Debt will eventually sink our economic ship and I think my money manager gave me the best advice he could as I’m sure he has no clue either…
I’ll keep these notes updated as a learn more about Duchenne Muscular Dystrophy (DMD) and the progress toward a cure.
I love Wired. They have incredible content for people interested in STEM but after I read an article I’m often left with a feeling that I grasped the basics but I really didn’t understand the details–and I think it may be because I didn’t listen as well as I should have during high school biology. For example, this article from August 2018 on DMD was very interesting to me because I have young relatives with the disease.
Basically the article says the following:
Some King Charles Spaniels have a mutation on their X chromosomes, in a gene that codes for a muscle protein called dystrophin much like a human suffering from DMD.
Eric Olson from the University of Texas Southwestern Medical Center has successfully halted the progression of the disease in some of the dogs using a gene editing tool known as CRISPR but there is still a lot of work to be done (additional longer-term canine studies to test for safety) before human trials would be safe.
“Olson found a way to target an error-prone hot spot on exon 51, which he figured could, with a single slice, benefit approximately 13 percent of DMD patients.”
Olson licensed the technology and founded a startup called Exonics Therapeutics along with the CureDuchenne group (who invested $2M) and The Column Group (who invested $40M).
One of the challenges is figuring out how to manufacture enough viral delivery vehicles to inject CRISPR into all the muscles in the human body.
I get the basics and I should just move on but I can’t... I need to know more. The new technology fascinates me: What is CRISPR and how does it work? What is gene editing? What is a viral delivery vehicle? What is dystrophin? ...but then there are also items I should understand but I don’t (items that I know I learned in high school but I’ve forgotten or never really grasped at the time): What’s a chromosome? What’s a gene? What’s an Exon? What’s a protein and why is it important? …and how do dogs relate to humans?
So the journey begins and it shows how I think and my limitations :-). I know I won’t understand what Exonics does without understanding CRISPR/Cas9. I won’t understand CRISPR/Cas9 without understanding ‘gene editing’. I won’t understand ‘gene editing’ without understanding chromosomes & genes. I won’t understand chromosomes & genes without understanding DNA. I won’t understand DNA without understanding cells. I won’t understand cells without understanding proteins. I won’t understand proteins without understanding molecules and atoms. Hopefully, you get the point. Most people know when to stop… me… unfortunately I need to go one step further and I constantly find myself realizing I didn’t retain much of what I learned in high school. …and then it becomes a bit of a puzzle. Some people like Sudoku… I like science. …but unfortunately, I’m not a scientist however I do have the passion (and motivation) to learn about this subject.
Let’s start with the basic definitions (YES, high school biology)–humans only:
The cell is the smallest unit of life. The human body has >10Trillion cells. A Cell has a membrane that contains receptors (proteins) that detect external signaling (ex. Hormones) and cytoplasm (all the stuff inside the cell like amino acids that perform functions and the nucleus).
We have to take a detour to high school chemistry for a second: What are molecules and atoms?
An atom is the smallest unit of matter containing a nucleus (Protons, Neutrons) and electrons. The number of atoms in the human body–it’s staggering (here).
A molecule is 2 or more atoms held together by chemical bonds. Much of the research references molecular formulas so you need to understand them.
A molecular formula (example ‘a’) is a representation of a molecule that uses chemical symbols to indicate the types of atoms followed by subscripts to show the number of atoms of each type in the molecule. (A subscript is used only when more than one atom of a given type is present.)
The structural formula (example ‘b’) for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule. The lines represent bonds that hold the atoms together. A chemical bond is an attraction between atoms or ions that holds them together in a molecule.
Example A and B are the formulae for methane as it contains one Carbon atom and four Hydrogen atoms. Here are other examples for your reference:
DNA (and RNA) are nucleic acids, and, along with lipids, proteins and carbohydrates, constitute the four major macromolecules essential for all known forms of life.
Specifically, DNA is a molecule composed of two chains that coil around each other to form a double helix carrying the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms. All the cells in a person’s body have the same DNA and the same genes. However, the difference between cells in different tissues and organs is that the “expression” of the genes differs between cells. Expression generally means that the message from the DNA is being copied and made into protein. For example, liver cells have different proteins than skin cells, even though their DNA is the same.
DNA is made up of Nucleotides (sugar, phosphates and nitrogenbases). There are 4 types of nitrogen bases: Thymine (T), Adenine(A), Guanine (G), Cytosine(C)
“A” bonds only with “T” and “C” only bonds with “G”
RNA is a molecule essential in various biological roles in coding, decoding, regulation, and expression of genes. Like DNA, RNA is assembled as a chain of nucleotides, but unlike DNA it is more often found in nature as a single-strand folded onto itself. Cellular organisms use messenger RNA (mRNA) to convey genetic information (using the nitrogenous bases of guanine, uracil, adenine, and cytosine, denoted by the letters (G, U, A, and C) that directs the synthesis of specific proteins. Many viruses encode their genetic information using an RNA genome.
A chromosome is a DNA molecule that contains part of a human’s genetic material. A human cell nucleus contains 23 pairs (46 total) of chromosomes (DNA molecules) which are long strands of DNA tightly wound into coils (note that sperm and egg cells contain only 23 total chromosomes). If you unwound each cells DNA it would be about 6 foot long.
A gene is a sequence (section) of DNA or RNA that uses a set of rules to translate information encoded within the DNA or mRNA sequences into proteins for a molecule that has a function.
Genes are either turned ‘on’ or ‘off’ mixed among other non-coded ‘junk DNA’.
Human beings have roughly 20,500 genes, all coiled up in DNA, housed in each cell. That’s 20,500 places where the machinery of human life can be altered.
Genes are divided into sections called exonsand introns (junk DNA). Exons are the sections of DNA that code for the protein and they are interspersed with introns.
The HUGO Gene Nomenclature Committee (HGNC) designates an official name and symbol (an abbreviation of the name) for each known human gene. The Committee has named more than 13,000 of the estimated 20,000 to 25,000 genes in the human genome.
Genes can also mutate… Although the human genome consists of 3 billion nucleotides, changes in even a single base pair can result in dramatic physiological malfunctions. For example, sickle-cell anemia is a disease caused by the alteration of a single nucleotide in the gene for the beta chain of the hemoglobin protein (the oxygen-carrying protein that makes blood red) and that is all it takes to turn a normal hemoglobin gene into a sickle-cell hemoglobin gene. This single nucleotide change alters only one amino acid in the protein chain– the results are devastating! Beta hemoglobin is a single chain of 147 amino acids, but because of the single-base mutation, the sixth amino acid in the chain is valine, rather than glutamic acid. Note below that ‘Wild-Type’ is the normal hemoglobin.
To understand amino acids like valine and glutamic acid you need to understand the codon table found here:
DNA sequencing is the process of determining the order of nucleotides in DNA. DNA molecules are incredibly long and consist of billions of nitrogen bases. In fact, if all the DNA bases of the human genome were typed as A, C, T, and G, the 3 billion letters would fill 4,000 books of 500 pages each. The Human Genome Project was the effort to map all the human nucleotides and genes.
The sickle-cell gene mentioned above is CLLU1 and if you were to compare the human gene sequence to that of a chimp or a macaque it would look like the following:
The CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) method is based on a natural system used by bacteria to protect themselves from infection by viruses. When a bacterium detects the presence of virus DNA it produces 2 types of short RNA one of which contains a sequence that matches that of the invading virus. These 2 RNAs form a complex with a protein enzyme called Cas9. Cas9 can cut DNA (think of Cas9 as a set of molecular scissors). When the matching sequence known as a “guide” RNA finds it matching target within the viral genome the Cas9 cuts the target DNA disabling the virus.
Cas9 can be engineered to cut any DNA sequence (not just viral DNA) at a precise location by changing the guide RNA to match the target DNA. Once inside the nucleus of the cell, the RNA-Cas9 complex will locate and lock on to a short target sequence known as the PAM (Protospacer Adjacent Motif). The Cas9 will then unzip the DNA and match it to its target RNA and if the match is complete the Cas9 will use its tiny molecular scissors to cut the DNA. Once the CRISPR system has made the cut this new DNA can pair up with the cut ends recombining and replacing the original sequence with the new version.
Here is the basic process:
Build the guide RNA (gRNA). This guide RNA will direct the protein (Cas9) to its target DNA sequence. The guide RNA consists of a tracrRNA (a scaffold sequence necessary for Cas-binding) and a crRNA sequence (a user-defined ∼20 nucleotide spacer) that is identical to the target. The crRNA can be any ∼20 nucleotide DNA sequence, provided it meets two conditions:
The sequence is unique compared to the rest of the genome.
The target is present immediately adjacent to the Protospacer Adjacent Motif (PAM). The PAM sequence is essential for target binding, but the exact sequence depends on which Cas protein you use (check out the list of additional Cas proteins and PAM sequences).
Guide RNA + CAS9. Once expressed, the Cas9 protein and the gRNA form a complex through interactions between the gRNA scaffold and surface-exposed positively-charged grooves on Cas9. Cas9 undergoes a conformational change upon gRNA binding that shifts the molecule from an inactive, non-DNA binding entity into an active DNA-binding entity. Importantly, the spacer region of the gRNA remains free to interact with target DNA.
Bind. Once the Cas9-gRNA complex finds a DNA target, the seed sequence (8-10 bases at the 3′ end of the gRNA targeting sequence) will begin to bind to the target DNA. If the seed and target DNA sequences match, the gRNA will continue to bind to the target DNA in a 3′ to 5′ direction.
Cut. Once Cas9 binds to the target DNA it cuts the target DNA ∼3-4 nucleotides upstream of the PAM sequence.
REPAIR: (NHEJ or HDR) Once the CRISPR system has made the cut this new DNA can pair up with the cut ends recombining and replacing the original sequence with the new version.
The efficient but error-prone non-homologous end joining (NHEJ) pathway
The less efficient but high-fidelity homology-directed repair (HDR) pathway
CRISPR can also be used to target many genes at once which is helpful for complex diseases that are caused not by one single mutation but by many genes acting together.
If you want to geek out you can try CRISPR yourself by ordering a kit here. … here is a YouTube video that shows the basics. If you want to go very very deep on CRISPR read this PMC article.
What is Dystrophin and how is it important to Duchenne Muscular Dystrophy (DMD)?
In the study published in Science, a team led by Eric Olson at the University of Texas Southwestern Medical Center used CRISPR to successfully modify the DNA of four young dogs, reversing the molecular defect responsible for the canine version of DMD
The dystrophin gene (view it in Ensembl) is the largest in the human genome, and there are thousands of different mutations that can all result in the disease. Olson found a way to target an error-prone hot spot on exon 51 (Ensembl), which he figured could, with a single slice, benefit approximately 13 percent of DMD patients
However, a challenge is manufacturing enough viral delivery vehicles to inject CRISPR into all the muscles in the human body and it is expensive.
What is Exonics doing?
From PMC Oct 2018 Gene editing restores dystrophin expression in a canine model of Duchenne muscular dystrophy
From ScienceMag.org Oct 2018 “We used adeno-associated viruses to deliver CRISPR gene editing components to four dogs and examined dystrophin protein expression…” “dystrophin was restored to levels ranging from 3 to 90% of normal, depending on muscle type. In cardiac muscle, dystrophin levels in the dog receiving the highest dose reached 92% of normal. The treated dogs also showed improved muscle histology. ” You can purchase the full report for $30 here.
From PMC Nov 2017 Single-cut genome editing restores dystrophin expression in a new mouse model of muscular dystrophy
From the funding PR release Nov 2017: “Exonics has used SingleCut CRISPR to genetically repair and restore dystrophin, the key protein missing in children with Duchenne.”
From ScienceMag.org April 2017 CRISPR-Cpf1 correction of muscular dystrophy mutations in human cardiomyocytes and mice “pathophysiological hallmarks of muscular dystrophy were corrected in mdx mice following Cpf1-mediated germline editing”
Preface: I’ve always respected well-practiced leadership principles—they were drilled into me during my time as a mid-level manager at Microsoft and I have built very strong opinions. With this background, I must say I find our President’s leadership unacceptable on many levels. However, this set of notes is not meant to promote a conservative or a liberal position. These notes have one goal – to find a glass-is-half-full position and to test those positions over time.
If you are wondering about my bias: I’ve always been fiscally conservative (i.e. lower taxes, reduced government spending, minimal government debt, free trade, and deregulation of the economy etc..) yet socially liberal (i.e. support universal healthcare, SMART poverty programs, investment in education, gay marriage, abortion, cannabis legalization etc..)—…and I believe good managers of resources can make both work!
Backdrop: On our family’s vacation in Europe this past summer we had dinner with the owner of a bed and breakfast where we stayed for a few days. Over the course of a great meal, the owner edged the discussion to the current US political landscape and he made the following statement that stuck with me–“the USA is getting a long-needed enema” … “The USA’s [government] system is strong enough to handle such an invasion and this Presidents’ flaws will highlight your country’s strengths.” I didn’t quite agree (I had a much more negative view at the time), but I’m starting to understand where he was coming from. I started to find the light recently when a good friend (HR executive and minority) said to me, “the racists were always there but it was hard to know who they were prior to this President, and now they are out in the open.” Another friend (ex-CIA) said “I look at him [the President] much like a plumber fixing a broken overflowing toilet—I don’t care if he smells, shows his crack, or even tells racist jokes… I just want the toilet fixed and the crap cleaned up [in our government].” I’m used to hearing people that have little underlying facts regurgitate what they have heard the night before on Fox News or MSNBC and I generally ignore them, but the friends I referenced above are highly educated people that have spent a great deal of time analyzing the US government and our political system.
So, after thinking about this quandary for a while I thought I’d write down some of the glass-is-half-full items that hopefully will come out of this President’s assault on the Executive Office to see if they stand the test of time.
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence. – Helen Keller
I’ll group these items in 5 broad categories:
1. More people will vote and get involved in politics
It seems that the President’s misogynist tendencies are driving more women to get involved—more are voting, and more are running and winning political office. It started the day after the President was inaugurated when millions of women worldwide took to the streets in a massive show of resistance. But since that day the President has been accused more than once of silencing women with whom he had had extramarital affairs during his administration. His liaison director in the White House Communications Office accused the President of calling her a “dog”. The President has publicly defended advisors and friends when they have been accused of domestic violence and sexual harassment at work. He continues to insult television presenters, artists, and models. He mocked Dr. Ford’s testimony at the Kavanaugh hearings and insulted a reporter during a press conference at the White House after giving her the floor to state her question and stating, “I know you’re not thinking, you never do.”. At rally’s he’s called out the negative consequences of the #metoo movement saying, “It is a very scary time for young men in America, where you can be guilty of something you may not be guilty of,”. The hope is that the President’s misogyny provides fuel for the #metoo movement, and its positive impact on women’s rights, and will drive more women to get involved in politics. Things look hopeful because a record number of women have run and won primaries for the U.S. House, U.S. Senate, and governorships this year, according to the Center for American Women and Politics at Rutgers University, and a record number of women have also won nominations for state legislatures. (more)
It seems that the President’s well-documented racist comments are driving more minorities to vote, especially after his remarks about the white nationalist rally in Charlottesville–As of August 2018, PBS found nearly 100 examples bridging on racial discrimination. According to the African American Research Collaborative, who surveyed African-Americans immediately before the 2018 mid-term elections, “9 out of 10 African-Americans surveyed on the eve of the election said they were voting or had already voted early for a Democrat in the congressional races, up from 77 percent who said so in July”. The hope is that more minorities vote and run for office and it seems to be working since an unprecedented number of Latinos ran for office in the 2018 primaries.
And then, we can only hope that the President’s hundreds (if not thousands) of bold lies and authoritarian tendencies (admiration for dictators) will wake up those that are considered ‘supporters’ to the fact that he is highly likely mentally unstable—and it looks like this is slowly happening. The fear about these unstable characteristics are also hopefully driving more people overall to the polls–We saw this during the 2018 midterm elections which aren’t usually known for high levels of turnout. On average, roughly 40% of eligible voters cast a ballot in a midterm. At least, that was the case from 1982 until this year, when an estimated 49% of the nation’s voting-eligible population (about 116 million people) cast a ballot, according to a preliminary analysis by the U.S. Elections Project.
Millions of citizens get their information, and form their opinions, by watching cable television or reading internet media sites. The US media systematically skews reporting in a way that crosses standards of professional journalism due to strong profit-making incentives by drawing conservative OR liberal audiences for infotainment versus news and monetizes those audiences with advertisers (see the bias here). Rupert Murdoch, the owner and executive co-chairman of 21st Century Fox (the parent of Fox News), self-identifies as a “libertarian” and exerts a strong influence over the media he owns (more on the Fox News effect here). Comcast owns NBC and the Xfinity cable system as well the MSNBC cable channel has a known liberal bias. These arguments intensified when it is revealed that both parties receive donations from these same organizations.
On February 17, 2017, our President tweeted “The FAKE NEWS media (failing @nytimes, @NBCNews, @ABC, @CBS, @CNN) is not my enemy, it is the enemy of the American People!”
The hope is that by our President calling attention to media bias (even though how he is doing it is twisted and self-serving) our citizens will recognize the undue influence of the outlets and begin to understand that they are being manipulated by one-sided propaganda.
4. We will have a better understanding of the weaknesses in our systems
Yes, partisan elected officials should not be in charge of the election administration process… yes, money has had a very corruptive influence on our Capitalism (see Citizens United)… yes, granting 2 senators from a rural state such as Wyoming (population 580,000 ) the same representation as California (home to 39 million) makes no sense—this list goes on and on… However, this is not the issue! The risk to democracy occurs when: “A nationalist leader gets elected by playing on public fears and anxieties, then uses the election as a hijacking tool by asserting a democratic mandate to centralize power by controlling or undermining pluralist institutions that stand in the way – a free media, an independent judiciary, a diverse civil society, civil liberties, and minority rights. What’s left is the shell of democracy.” “He’s [our current President] labeled journalists “enemies of the people” and assaulted the mainstream media as purveyors of fake news. He’s challenged the independence of the judiciary and smeared the integrity of judges. He’s attacked civil society by claiming massive voter fraud, challenging the voting rights of millions of Americans, and discounting minority voters by supporting the gerrymandering of their election districts. And he’s abused the power of the presidency by putting pressure on the FBI Director to drop an investigation of a former Trump White House official, then firing the Director for investigating whether the Trump campaign colluded with Russia to influence the Presidential election.” – HumanityInAction.ogr
If you don’t believe in the President, then believe in the system! Our Constitution divided the Government into three branches: legislative, executive, and judicial for something called checks and balances to make sure no one branch would be able to control too much power and to guard against tyranny. “If men were angels, no government would be necessary,” “In framing a government which is to be administered by men over men, the great difficulty is this: You must first enable the government to control the governed; and in the next place, oblige it to control itself.” — James Madison, The Federalist Papers
The hope is that we learn where our system is vulnerable and legislate fixes to strengthen our democracy.
5. We will have a better understanding of the weaknesses in our society (Technology & Globalism)
Technology: Google, Facebook, and Twitter threaten our democracy by being abused and if left unchecked will continue to be used for political corruption. These social media & search giants are beginning to understand their roles, but they are public companies that are driven by profitability and will always have their shareholders as their top priority. The hope is that we now understand these issues and take a thoughtful approach to new legislation.
Globalism has had both a positive and a negative impact. Positive for corporations (and in turn employees) and negative for those displaced by the change. Countries like China and India benefit where the US, UK, and EU may not—hence populism is taking hold across all those geographies. China transformed peasant farmers into low-cost manufacturing workers, thereby reducing poverty but those jobs were at the cost of jobs in America’s Rust Belt. India and western Europe’s $15/hour accounting, customer service, and technical skills replaced white-collar American workers earning $50+/hour. These issues had a lot to do with the election of this President and can no longer be ignored–The hope is that we never again neglect these issues.
“All the great things are simple, and many can be expressed in a single word: freedom, justice, honor, duty, mercy, hope.” – Winston Churchill
Whether you are left or right leaning, respect our President or do not… Have hope, understand the bias and its motivations, respect others, know your facts and get involved!
Warning: This is a long article so if you have ingested cannabis recently you may not make it through to the end. 😉 Come back after you sustain for at least 24 hours.Reference: “Attention, memory and learning are impaired among heavy marijuana users, even after users discontinued its use for at least 24 hours”- “The Residual Cognitive Effects of Heavy Marijuana Use in College Students,” Pope, HG Jr., Yurgelun-Todd, D., Biological Psychiatry Laboratory, McLean Hospital, Belmont, MA
I put these notes together because the topic of cannabis is coming up at holiday parties and in discussions with friends and family. I personally want to be knowledgeable on the subject because we live in Washington DC where cannabis use has been decriminalized. I walk in the morning each day and see many people openly using it as I stroll along the waterfront–I have no issue with this, but I do take issue with users NOT having all the information about the impact of cannabis on their health (especially people under 25–more below). I also think that there is a lot of confirmation bias occurring as I discuss the subject with others.
Let’s start with the confirmation bias by reviewing something similar from 1991 when 60 Minutes ran a story about the potential benefits Americans could potentially get from drinking more red wine. Morley Safer stated that “the (French) farmers have been eating a very high-fat diet, it seems, and yet they don’t get heart disease,” “the explanation of the paradox, may lie in this inviting glass” – and demand for red wine spiked! –what did I do? I loaded up on red wine. Yet the American Heart Association reported that many of red wine’s benefits, including antioxidants and HDL, can be obtained through other fruits and vegetables and no “direct comparison trials” had been conducted “to determine the specific effect of wine or other alcohol on the risk of developing heart disease or stroke.” Why do I bring this up? Simply to help you understand ‘confirmation bias’– the tendency to search for, interpret, favor, and recall information in a way that confirms one’s preexisting beliefs or hypotheses. People tend to interpret ambiguous evidence as supporting their existing position. The effect is stronger for emotionally charged issues (politics, alcohol, and weed) and for deeply entrenched beliefs especially if you are personally involved. I believe this same thing is happening with cannabis and many people are ignoring the issues and, more importantly, the ‘known’ unknowns!
So what facts do most people know… what facts may they not know… and what is currently unknown (or what do we know that we don’t know–the ‘known’ unknowns)?
There are 3 species of cannabis: Sativa, Indica, and Ruderalis. Sativa is widely accepted as being indigenous to Central Asia, Indica may have originated from the Hindu Kush mountain range and Ruderalis is native to central and Eastern Europe and Russia. Indica strains generally provide a sense of deep body relaxation. Sativa strains tend to provide a more energizing experience and the effects of Ruderalis are minimized by its naturally low concentrations of THC. Note that how Indica & Sativa make users feel has not been scientifically proven. Ruderalis is attractive to breeders because of its auto-flowering trait. When medical cannabis dispensaries promote their products, they will report both the amount of THC/CBD and the strain I=Indica, S=Sativa and H=Hybrid of the 2 other strains. Usually, they will also report the symptoms and conditions as seen in the figure.
Beyond cannabinoids, cannabis also contains “Terpenes” the fragrant oils that give cannabis its aromatic diversity (berries, fuel, Lavender etc.). These oils are secreted in the flower’s sticky resin glands. Terpenes are by no means unique to cannabis; they can be found in many other herbs, fruits, and plants as well. Like cannabinoids, terpenes bind to receptors in the brain and give rise to various effects. Different harvests may demonstrate dramatically different terpenoid profiles due to variances in growing and curing techniques. Myrceneis the most abundant terpene in cannabis, which is where it’s mostly found in nature. It can make up as much as 65% of total terpene profile in some strains. Limonene is the second most abundant terpene in all cannabis strains, but not all strains necessarily have it. Linalool is the most responsible for the recognizable cannabis smell with its spicy and floral notes. Caryophyllene has a spicy and peppery note. Alpha-pinene and Beta-pinene smell like pine trees. Alpha-bisabolol has a pleasant floral aroma. … and there are many more Eucalyptol, Trans-nerolido, Humulene, Delta 3 Carene, Camphene, Borneol, Terpineol, Valencene, and Geraniol.
As of November 2018, 33 states and the District of Columbia have broadly legalized cannabis for recreational (The District of Columbia, California, Colorado, Maine, Massachusetts, Michigan, Nevada, Oregon, Vermont, and Washington) or medical use under certain circumstances.
Many state politicians are moving to legalize cannabis because:
The tax revenues are sorely needed by the state governments (Study: Legal cannabis could generate more than $132 billion in federal tax revenue and 1 million jobs)
There are too many people incarcerated for cannabis possession costing taxpayers a fortune (Stats: Number of people arrested in the USA for a cannabis law violation in 2017: 659,700; Number of those charged with cannabis law violations who were arrested for possession only: 599,282 (90.8%); Cost’s taxpayer ~$15.9 Billion/year).
Having a safe source of cannabis that’s not contaminated with pesticides or laced potentially with other drugs will save lives.
Several medical benefits have been proven:
In June 2018, the food and Drug Administration (FDA) approved the use of a medication containing cannabidiol (CBD) to treat two rare, severe, and specific types of epilepsy — called Lennox-Gastaut syndrome and Dravet syndrome — that are difficult to control with other types of medication. This CBD-based drug is known as Epidiolex. A study published in 2017 found that the use of CBD resulted in far fewer seizures among children with Dravet syndrome, compared with a placebo.
Evidence suggests that oral cannabinoids are effective against nausea and vomiting caused by chemotherapy, and some small studies have found that smoked cannabis may also help to alleviate these symptoms.
Evidence to date suggests that cannabis could help to treat some mental health conditions. Its authors found some evidence supporting the use of cannabis to relieve depression and post-traumatic stress disorder symptoms. That being said, they caution that cannabis is not an appropriate treatment for some other mental health conditions, such as bipolar disorder and psychosis.
Another comprehensive review of the evidence, published last year in the journal Clinical Psychology Review, revealed that using cannabis may help people with alcohol or opioid dependencies to fight their addictions. But this finding may be contentious; the National Academies of Sciences review suggests that cannabis use actually drives increased risk for abuse, and becoming dependent on, other substances.
A review from the National Academies of Sciences, Engineering, and Medicine assessed more than 10,000 scientific studies on the medical benefits and adverse effects of cannabis. One area that the report looked closely at was the use of medical cannabis to treat chronic pain.
A lot of people with “Doctor” in their titles say there is “evidence” that cannabis has a lot of positive medical benefits. Websites are reporting benefits such as weight loss, prevent diabetes, fight cancer, treat autism, heal broken bones, treat ADHD, slow Alzheimer’s disease, treat STDs, help OCD, improve skin, replace viagra, lower blood pressure etc… I’m not saying these items are not true–they are just NOT proven like Safer’s red wine story above.
And finally, many people are medicating, self-medicating or just enjoying cannabis. (USA: 22.2 million, International: 158.8 million)
What most people DON’T know?
There has NOT been a lot of research—Why? We know a lot about how alcohol impacts the body because researchers have been doing studies for years (more). But we don’t know more about the impact of cannabis on the body primarily because the U.S. Drug Enforcement Administration (DEA) considers cannabis a Schedule I drug, the same as heroin, LSD, and ecstasy, and likely to be abused and lacking in medical value. Because of that, researchers need a special license to study it. Hopefully, this turns around soon given Sen. Chuck Grassley (R-IA), a longtime ardent cannabis legalization opponent, is stepping down as chair of the Senate Judiciary Committee potentially paving a path forward for cannabis legislation in the 116th Congress and Sen. Lindsey Graham (R-SC) is taking over. Graham is significantly more open-minded about medical cannabis and other common-sense reform measures than the current chairman is. Grassley refused to let any cannabis bills come to a vote as Judiciary chairman, Graham has cosponsored of legislation to protect legal medical states from federal interference, supported the reschedule of cannabis and supported the removal of cannabidiol (CBD) from the list of federally banned substances.
How cannabis impacts the brain. Cannabis acts on the body’s endocannabinoid system. Great video here. A great scientific description of cannabinoids here and here. We have cannabinoid receptors all over the brain and endocannabinoids are released naturally by the body to perform certain functions. For example, the hypothalamus releases them to stimulate appetite. Guess what? THC (tetrahydrocannabinol) also binds to these receptors—ever hear of the ‘munchies’? The cannabinoid receptors are special receptors within the endocannabinoid system in the brain. The cannabinoid THC molecule activates particular cannabinoid receptors. These receptors, called CB1 and CB2 (there may be many others found in the future), work like a lock and key when flooded with cannabinoids after a user ingests cannabis. CB1 receptors are found primarily in the brain, more specifically in the basal ganglia and in the limbic system, including the hippocampus and the striatum. They are also found in the cerebellum and in both male and female reproductive systems. CB1 receptors are absent in the medulla oblongata, the part of the brainstem responsible for respiratory and cardiovascular functions (likely why you can’t overdose easily on cannabis). CB1 is also found in the human anterior eye and retina. CB2 receptors are predominantly found in the immune system or immune-derived cells with the greatest density in the spleen. While found only in the peripheral nervous system, a report does indicate that CB2 is expressed by a subpopulation of microglia in the human cerebellum. CB2 receptors appear to be responsible for the anti-inflammatory and possibly other therapeutic effects of cannabis. Cannabinoid receptors are activated by three major groups of ligands (a molecule that binds to another molecule) endocannabinoids, produced from within the body, synthetic cannabinoids (such as HU-210), and plant cannabinoids (such as CBD & THC).
There are potentially big negative impacts
Cannabis can be addictiveto some people The ‘dependence’ scenario is known as a Cannabis Use Disorder. The definition is that you’ve become dependent on it psychologically, or physiologically. About 9% of cannabis users become addicted to it. Cannabis Use Disorder in school often causes a dramatic drop in grades, truancy, and reduced interest in sports and other school activities. In adults, this disorder often is associated with work impairment, unemployment, lower income, welfare dependence, and impaired social functioning. Higher executive functioning is impaired in Cannabis Use Disorder which contributes to school and work impairment. This disorder also significantly decreases motivation at school or work. There is an increased risk of accidents while driving, at sports or at work.
Overdose is not likely but you can end up in the hospital… Cannabis is not in the same category as opioids that cause respiratory depression and stop breathing but it can cause hyperemesis (continuous vomiting) and increase a user’s blood pressure significantly. It can cause a user to feel paranoid and get acute psychosis and a small percentage of people may develop a long-term illness but much more research is needed.
It has a bigger impact on a young persons (under 25) brain. Jodi Gilman published research on 18-to-25-year-olds that showed differences in the brain’s reward system between users and non-users. Gilman has also concluded (research) there is evidence that cannabis use, especially when initiated at a young age, (perhaps due to the effects of delta-9- tetrahydrocannabinol on cannabinoid (CB1) receptors in the brain) may be associated with worse verbal memory and altered neural development. Gilman is also reported that young adults with early-onset cannabis use had learning weaknesses and delayed recall.
Chronic bronchitis. There is substantial evidence of an association between long-term cannabis smoking and an increase in the frequency of episodes of chronic bronchitis. (see NASEM report referenced below)
Vehicle crashes. There is substantial evidence of an association between smoking cannabis and an increased risk of motor vehicle crashes. (see NASEM report referenced below)
Low birth rate. There is substantial evidence of an association between maternal cannabis smoking and low birth weight. (see NASEM report referenced below)
Schizophrenia and other psychoses. There is substantial evidence of an association between smoking cannabis and developing schizophrenia and other psychoses. The most frequent users are at the highest risk. (see NASEM report referenced below)
What is yet to be known?
We don’t fully understand the endocannabinoid system and how it is involved in certain functions (like psychosis, schizophrenia, and anxiety). We don’t know why the response to cannabis varies so much across people. For example, some people report getting paranoid when they use cannabis and others report that it helps with anxiety. Why? We do know that some people have imbalances in their endocannabinoid system (under/overproduction of natural cannabinoids) in certain conditions but we don’t know exactly why.
We don’t understand what makes one user feel one way or another. Just saying Indica is relaxing and Sativa is a stimulant is not accurate and has never been scientifically proven. Many researchers believe that the different and diverse effects of cannabis are derived not from the genus, but from the Cannabinoids and Terpenoids produced by the plant as it grows as well as the user’s specific endocannabinoid system at the time of use.
We don’t know how to dose cannabis or how best to ingest the drug. We don’t know the appropriate doses for an individual’s physiology, or how best to take it (smoke it or use an edible). Most medical cannabis prescriptions just get users into the dispensary but don’t say exactly what to buy and how much to take–try that at the CVS pharmacy…
We don’t know if cannabis impacts a users’ short-term memory, mood control, attention, and motivation. We know cannabis affects the hippocampus (the part of the brain that stores memories) and empirical evidence show that it may impact the ability to recall and retain information in the short term and it makes it hard to remember things, but this research is just starting.
We don’t know a lot about the impact of cannabis on the young brain. The brain is more susceptible to permanent effects of drugs if you’re younger (under 25) but in regard to cannabis is it how early it started, how frequently it’s used, the higher the dose and how bad is the impact? Unknown… According to Krista Lisdahl, an associate professor of psychology and director of the Brain Imaging and Neuropsychology Lab at the University of Wisconsin at Milwaukee–In studies of those chronic, heavy users, “we see cannabis users have slower processing speed, worse memory and learning scores on certain tests, poorer sustained attention,”. There are also links to depression and sleep problems in some of those users, and some heavy users show brain changes linked to poorer emotional control or memory. These changes have been particularly observed in people who began using cannabis before ages 16 or 17. (more here).
We don’t know how genes play a roleScientists have identified genes that increase susceptibility, but there may be others and we are just at the beginning of understanding that.
We know very little about the interaction of cannabis with other drugs. The Mayo Clinic lists the following ‘possible’ drug interactions: Alcohol, Anticoagulants and anti-platelet drugs, herbs and supplements. CNS depressants, Protease inhibitors, Selective serotonin reuptake inhibitors… However very little is known.
We don’t know much about each of the cannabinoids (see appendix). Per Ryan Vandrey, an associate professor of psychiatry who researches cannabis at Johns Hopkins Medicine “We know a lot about THC and we’re starting to learn about CBD” “Out of about 400 [compounds] we know a decent amount about two.” The unknowns about what various cannabinoids do and how they interact with each other create plenty of questions about the best ways to use medical cannabis. That means there’s a lot to learn about which compounds might contribute to psychoactive effects and which might potentially have medical uses.
The National Academies of Sciences, Engineering, and Medicine (NASEM) has released a thorough report that answers what claims are well-grounded and what claims are not. The report is based on more than 10,700 abstracts of papers published in peer-reviewed journals since 1999.Download here.
These notes are not about legalization—in fact, legalization is good (especially at the federal level) if it allows scientists to better understand cannabis and its impact on the brain. These notes are about understanding what is known and what is unknown so you can make a reasonable decision on your own personal use now that cannabis is being decriminalized across the country. You don’t want to be one of those people that said—no one told me that smoking tobacco caused cancer. Especially when scientists suspected it as far back as 1898. Remember science blunted the power of the tobacco industry and prevented nearly 800,000 cancer deaths in the United States between 1975 and 2000.
Please keep in mind that there are a number of moving parts in the cannabis equation. There are the cannabis cannabinoids (science has only really studied 2 out of the >100 that may exist), the cannabis terpenes (>100 most not studied in regards to impact on health), how the cannabis is ingested (smoked, edible), how much cannabis is ingested (mg), your cannabinoid receptors (we know of 2 but think there are more), your endocannabinoid system (not well understood by science yet it is believed to regulate and balance things like nerve functions, stress recovery, inflammation levels, immune function, energy intake and storage, cell life and the circulatory system), and your specific DNA–not to mention interaction with other things you have taken. So don’t say “people have been smoking it for 100’s of years”, “I like to get high and it’s not having an impact on me”, “It’s healthier than drinking” without understanding that you are getting involved with a very complex drug that is not well understood.
If you are going to use cannabis know your facts and stay up on the science or risk being one of the “No one told me cannabis caused…” of the future.
Cannabidiol (CBD) – CBD does not have intoxicating effects like those caused by THC, and may have an opposing effect on disordered thinking and anxiety produced by THC. Cannabidiol has very low affinity for the cannabinoid CB1 and CB2 receptors but is said to act as an indirect antagonist (blocks or dampens a biological response) of these receptors. At the same time, it may potentiate the effects of THC by increasing CB1 receptor density or through another CB1 receptor-related mechanism.
Cannabidivarin (CBDV) – usually a minor constituent of the cannabinoid profile, enhanced levels of CBDV have been reported in feral cannabis plants from the northwest Himalayas, and in hashish from Nepal.
Cannabigerol (CBG) – is non-psychoactive but still contributes to the overall effects of Cannabis. CBG has been shown to promote apoptosis in cancer cells and inhibit tumor growth in mice. It acts as an α2-adrenergic receptor agonist, 5-HT1A receptor antagonist, and CB1 receptor antagonist. It also binds to the CB2 receptor.
Cannabinol (CBN) – the primary product of THC degradation, and there is usually little of it in a fresh plant. CBN content increases as THC degrades in storage, and with exposure to light and air. It is only mildly psychoactive. Its affinity to the CB2 receptor is higher than for the CB1 receptor.
Delta-9-tetrahydrocannabivarin (THCV) – prevalent in certain central Asian and southern African strains of Cannabis. It is an antagonist of THC at CB1 receptors and lessens the psychoactive effects of THC.