October 5, 2015
Rhonda Patrick: Buffering the effects of stress with meditation
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- Eustress: Positive stress (like working hard), but taken too far it can create anxiety
- Distress/Chronic Stress: Rumination about the past or future
- Associated with very high levels of costisol (stress hormone)
- Corticotropin mediating hormone: Mediator of stress hormones
- Released by hypothalamus and has direct effect on brain and increase amyloid beta plaques outside of neurons – breaking breaks between neural connections – cell death
- Disrupt energy metabolism is neurons/glial cells – release of reactive oxygen species – amyloid beta plaques – cell death
- Impact on the Gut: Stress has a big impact (along with diet of course)
- Increase permeability of the gut (via release of corticotropin mediating hormone)
- Mast cells in gut: receptors to cort. Hormone – activating them as immune cells = war = inflammation (release tnf-alpha, proteases, etc.) — Leaky gut
- Allow bacteria to cross epithelial barrier leading to more inflammation
- Inflammation is a key driver of the aging process: Low inflammation found to be the only biomarker of living to old age (association, not causation)
- Tested in mice and you see that inflammation leads to early death and general health breakdown
- Accelerated Telomere shortening which leads to aging
- Weakens Immune System by triaging energy to repair gut/inflammation/etc. so immune system doesn’t have enough energy to fight off actual disease/invaders
Meditation:
- Mindfulness to focus thoughts/emotions to the present moment
- Help you be aware of your decisions and why you make them
- Promote empathy and compassion, because you better understand why people act certain ways vs. ruminations/dwelling on negative issues
- Rhonda tends to overwhelm herself with work, but also with social experience which mindfulness might help with this
- Studies have linked meditation to reduced ruminative thoughts and consequently chronic stress (monks claim that it helps love/compassion permeate the mind, Rhonda’s not so sure but does get some clarity of mind)
- Studies show that normal people who start meditation have reduced stress
- Effect on brain:
- Production of gamma waves in the brain – indivative of neural plasticity/ability to learn new things and change/marker of youth (always higher in young vs/ hold)
- Can be modulated up/down
- 50 year old meditators claims their brains look like 25 year old (Rhonda is skeptical) – correlation. Not causation
- Follow-up study: People who have never, go through 8 week mindfulness program – 40 minutes/day
- 4 brain regions increased in brain volume after just 8 weeks!
- Hippocampus (learning/memory), Ponds (brain stem creating many neurotransmitters), prioral junction (empathy/compassion), posterior cingulate (mind wandering, self relevance)
- Amygdala (Fight/Flight/anxiety) was decreased, correlated with reduction of stress hormone levels
- Slow biological aging: Shortening of telomeres (caps at end of chromosomes to protect DNA in them)
- As they shorten over time as some of it is not copied during DNA replication (3 prong overhang where a tiny piece does not get copied)
- So next cell loses just a little bit of the telomere and over the years they shorten/go away then cell either
- Senescent: sits around doing nothing, but release bad crap that damages nearby cells hurting telomeres of those cells, etc. etc.
- OR Apoptosis: Cell death pathway, which can be better than senescient
- But if it’s a stem cell, you get tissue aging as stem cell isn’t around to rebuild your organs
- Stems cells tend to age more slowly: enzyme called telomerase which can rebuild telomeres (so they tend to be longer than non stem-cells)
- Sperm/ovary cells also have telomerase
- But most other cells silence ability to make telomerase is high levels immortalize cells (if they are cancer and immortal is bad…)
- OR Reactivation of Telomerase: usually in older age, called alternative lengthening of telomeres – cell overrides cell death mechanism = CANCER
- TAKE precaution on therapies that try activate telomerase (e.g. TA65)!
- Linked to cv disease, t2d, etc. etc.
- Chronic stress connected to telomere shortening
- So next cell loses just a little bit of the telomere and over the years they shorten/go away then cell either
- Meditation can also increase telomere length and reverse shortening by activating telomerase (Elizabeth Blackburn at UCSF)
- Try meditation: Transidental Meditation, Float Tanks, Guided Meditation (Head Space), yoga, immerse in nature and listen to your mind
- As they shorten over time as some of it is not copied during DNA replication (3 prong overhang where a tiny piece does not get copied)
- 4 brain regions increased in brain volume after just 8 weeks!
- Production of gamma waves in the brain – indivative of neural plasticity/ability to learn new things and change/marker of youth (always higher in young vs/ hold)
