Tag Archives: Survival

Dietary Fiber And SCFAs Are Relatively Higher in Centenarians-A Pathway To Longevity?

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Papers referenced in the video:
The Age-Accompanied and Diet-Associated Remodeling of the Phospholipid, Amino Acid, and SCFA Metabolism of Healthy Centenarians from a Chinese Longevous Region: A Window into Exceptional Longevity
https://pubmed.ncbi.nlm.nih.gov/36297104/

The Role of Short-Chain Fatty Acids From Gut Microbiota in Gut-Brain Communication
https://pubmed.ncbi.nlm.nih.gov/32082260/

Lithocholic Acid: A Gut Bacterial Metabolite That Extends Lifespan

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Papers referenced in the video:
Metagenomic and metabolomic remodeling in nonagenarians and centenarians and its association with genetic and socioeconomic factors https://www.nature.com/articles/s43587-022-00193-0

Methionine Restriction Extends Lifespan in Progeroid Mice and Alters Lipid and Bile Acid Metabolism https://pubmed.ncbi.nlm.nih.gov/30157432/

Lifespan extension and delayed immune and collagen aging in mutant mice with defects in growth hormone production https://pubmed.ncbi.nlm.nih.gov/11371619/

Alterations in xenobiotic metabolism in the long-lived Little mice https://pubmed.ncbi.nlm.nih.gov/17521389/

Bile Acids: A Communication Channel in the Gut-Brain Axis https://pubmed.ncbi.nlm.nih.gov/33085065/

Lithocholic acid significantly improves the survival of Drosophila melanogaster https://pubmed.ncbi.nlm.nih.gov/30051966/

Novel bile acid biosynthetic pathways are enriched in the microbiome of centenarians https://pubmed.ncbi.nlm.nih.gov/34325466/

Divergent effects of resistance and endurance exercise on plasma bile acids, FGF19, and FGF21 in humans https://pubmed.ncbi.nlm.nih.gov/30089729/

Chemical genetic screen identifies lithocholic acid as an anti-aging compound that extends yeast chronological life span in a TOR-independent manner, by modulating housekeeping longevity assurance processes https://pubmed.ncbi.nlm.nih.gov/20622262/

Novel bile acid biosynthetic pathways are enriched in the microbiome of centenarians https://pubmed.ncbi.nlm.nih.gov/34325466/

Bile Acids: The Next Frontier In Longevity?

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Papers referenced in the video:

Glycine supplementation extends lifespan of male and female mice https://pubmed.ncbi.nlm.nih.gov/30916479/

Ergothioneine exhibits longevity-extension effect in Drosophila melanogaster via regulation of cholinergic neurotransmission, tyrosine metabolism, and fatty acid oxidation https://pubmed.ncbi.nlm.nih.gov/34877949/

17-a-estradiol late in life extends lifespan in aging UM-HET3 male mice; nicotinamide riboside and three other drugs do not affect lifespan in either sex https://pubmed.ncbi.nlm.nih.gov/33788371/

Metagenomic and metabolomic remodeling in nonagenarians and centenarians and its association with genetic and socioeconomic factors https://www.nature.com/articles/s43587-022-00193-0

Methionine Restriction Extends Lifespan in Progeroid Mice and Alters Lipid and Bile Acid Metabolism https://pubmed.ncbi.nlm.nih.gov/30157432/

Lifespan extension and delayed immune and collagen aging in mutant mice with defects in growth hormone production https://pubmed.ncbi.nlm.nih.gov/11371619/

Alterations in xenobiotic metabolism in the long-lived Little mice https://pubmed.ncbi.nlm.nih.gov/17521389/ Life-Span Extension in Mice by Preweaning Food Restriction and by Methionine Restriction in Middle Age https://pubmed.ncbi.nlm.nih.gov/19414512/

Bile Acids: A Communication Channel in the Gut-Brain Axis https://pubmed.ncbi.nlm.nih.gov/33085065/

65 – 100% Lifespan Extension In Drosophila: A Conversation With Dr. Michael Rose

Part II: Use Of Machine Learning In Longevity Science: A Conversation With Dr. Michael Rose

Part III: Which Diet Is Optimal For Health: The Evolutionary Perspective

Full, 80-minute, unedited video:

Papers referenced in the videos:

Can human aging be postponed? https://pubmed.ncbi.nlm.nih.gov/10614072/

Paper referenced in the video: Diet and Botanical Supplementation: Combination Therapy for Healthspan Improvement? https://pubmed.ncbi.nlm.nih.gov/32924860/

Dr. Rose’s website: https://55theses.org/

Dietary Fiber Improves Antiviral Defense

CD8+ T cells are a subset of lymphocytes that play a major role in antiviral defense (Kulinski et al. 2013). However, recently published evidence shows reduced levels of circulating CD8+ T cells in people infected with SARS-CoV-2 (Zheng et al. 2020, Wang et al.  2020; HC= healthy controls, NCP = patients with COVID-19 related pneumonia):

Picture1

Immune enhancing treatments, including thymalfasin and immunoglobulin are being provided to SARS-COV-2 infected subjects with some success. For example, 37/55 (67%) subjects saw improvements for circulating CD8+ levels in Wang et al. 2020, but additionally, 18/55 subjects did not experience increased CD8+ counts:

Screen Shot 2020-04-12 at 12.02.19 PM

Accordingly, levels of CD8+ T cells were identified as an independent predictor for COVID-19 severity and treatment efficacy (Wang et al. 2020). When considering that CD8+ cells were not increased in all subjects in Wang et al., are there are other strategies that may be helpful? Interestingly, increased levels of CD8+ cells are found in the lungs of mice infected with the influenza A virus in response to a high soluble-fiber diet, when compared with control-fed mice (Trompette et al. 2018):

Screen Shot 2020-04-12 at 7.27.41 AM

As a result, lung viral load is more than 10-times reduced 8-days after infection in high soluble fiber-fed mice:

Screen Shot 2020-04-12 at 7.31.54 AM

Moreover, average survival in mice infected with influenza A is significantly better when fed the high soluble-fiber diet, when compared with control fed-mice:

Screen Shot 2020-04-12 at 7.22.19 AM

Is it possible that a high soluble fiber diet can increase CD8+ cells in people infected with SARS-CoV-2, thereby enhancing their recovery and survival? No studies have tested this hypothesis (yet). While conventional medical treatment is obviously helpful, based on the findings of Trompette et al. (2018), further optimization of immune defense against viral infections may occur when including soluble fiber-rich foods.

References

Kulinski JM, Tarakanova VL, Verbsky J. Regulation of antiviral CD8 T-cell responses. Crit Rev Immunol. 2013;33(6):477-88. Review.

Trompette A, Gollwitzer ES, Pattaroni C, Lopez-Mejia IC, Riva E, Pernot J, Ubags N, Fajas L, Nicod LP, Marsland BJ. Dietary Fiber Confers Protection against Flu by Shaping Ly6c Patrolling Monocyte Hematopoiesis and CD8+ T Cell Metabolism. Immunity. 2018 May 15;48(5):992-1005.e8. doi: 10.1016/j.immuni.2018.04.022.

Wang F, Nie J, Wang H, Zhao Q, Xiong Y, Deng L, Song S, Ma Z, Mo P, Zhang Y. Characteristics of peripheral lymphocyte subset alteration in COVID-19 pneumonia. J Infect Dis. 2020 Mar 30. pii: jiaa150. doi: 10.1093/infdis/jiaa150.

Zheng M, Gao Y, Wang G, Song G, Liu S, Sun D, Xu Y, Tian Z. Functional exhaustion of antiviral lymphocytes in COVID-19 patients. Cell Mol Immunol. 2020 Mar 19. doi: 10.1038/s41423-020-0402-2.

Coronavirus isn’t the only virus that negatively affects human health.

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