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RE: Molecules to Mental States: Psychological Stress and Cell Death

in #neuroscience7 years ago

OK, so this is a pretty interesting piece. Thanks for sharing it. I like your intro to excitotoxic pathways and how they contribute to cell death. It's a critical pathway to know about and it plays a role in many pathologies, as you included.

I want to share with you a caution I've learned going from a basic science lab into drug development and clinical practice. Basic science is inherently reductionist in nature. We try to distill a process down to one protein, one gene, one root cause. While you may see an effect in a KO mouse its translatability to humans and to clinical medicine MAY not pan out. Mother nature is one smart complex lady. We all know that a mechanism may make sense or work in a lower mammalian model but when tried in humans it doesn't work or cause harm. I caution anyone that anyone hangs their hat on one protein or gene to fix a neurologic problem, unless it's a problem having to do with a miscoded protein/lack there of and you are using a gene therapy to replace that missing gene.

This is the challenge of neuroscience and therapeutics. We still don't fully understand how the brain works. We are trying to solve a puzzle that we don't even have all the pieces to yet. It's exhilarating and frustrating. You talk a lot about memory, LTP and LTD, but what physically, in the brain, is a memory. It's a philosophical question because no one really has a definitive answer (I have my own thoughts on this).

At the end of the day modulating Lynx 2 MAY be of benefit. I'd bet it helps people who are lacking it or have lower levels to tolerate normal stresses. Do I think that upregulating it will prevent cell death in a stroke? Doubtful

Again, thanks for sharing this. I just caution anyone from hanging their hat on any one mechanism as the therapy to fix everyone with a particular disease. It can work in some cases, but not in most.

Be inquisitive, skeptical and always curious

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Yes, I too share such a caution. I certainly do not intend to suggest that Lynx 2 could be fully responsible for the grand sum of cell death and plasticity, but rather I wanted to show how a single gene and its protein can have behavioral and cognitive implications.

This modulator is a particularly good example in my opinion, as it is:

  • Up regulated during the critical period
  • Causes the physiology of MDT cells which project to the mPFC to exhibit kinetics which reduce LTP downstream
  • Deletion causes excitotoxicity in the mPFC cells after nicotine infusion to MDT projections
  • And it is conserved well across rodents and humans

Also, they are doing some human assessments for certain things which I am not at liberty to disclose as they are yet to be published.

Exciting! do let us know when they are published. apoptosis is a fascinating topic. What's your next article going to be on?

Not sure yet, but I plan to write one tomorrow when I have a free moment!

Hey all. I started taking proposals for topics people are interested in. See the post for what topics I can explain off the cuff. More in-depth ones will take longer but I look forward to interacting.

https://steemit.com/health/@toxdocx/community-interest