Tag Archives: SCFA

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

Join us on Patreon!
https://www.patreon.com/MichaelLustgartenPhD

TruDiagnostic Discount Link (Epigenetic Testing)
CONQUERAGING!

https://bit.ly/3Rken0n

Bristle Discount Link (Oral microbiome quantification):
ConquerAging15
https://www.bmq30trk.com/4FL3LK/GTSC3/

Cronometer Discount Link (Daily diet tracking):
https://shareasale.com/r.cfm?b=1390137&u=3266601&m=61121&urllink=&afftrack=

If you’d like to support the channel, you can do that with Buy Me A Coffee!
https://www.buymeacoffee.com/mlhnrca


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/

The Impact Of The Microbiome On Lifespan

Germ-free mice (animals don’t have a microbiome) live longer than microbiome-containing mice, but it’s impractical for people to live in a bubble for their entire lifespan. As a more practical approach, which microbiome-derived factors impact lifespan, and can they be modified?

Dietary supplementation with acarbose increases lifespan, and one reason for that may involve reduced circulating levels of glucose, but the other side of that story involves increased gut bacterial production of short chain fatty acids (SCFAs). Whether acarbose will increase lifespan in people is unknown, and with the goal of increasing lifespan, are there other ways to increase SCFAs?

The Gut-Muscle Axis in Older Adults

How does the gut microbiome and its metabolic products affect muscle mass, muscle composition, and physical function? In this presentation, I review the evidence, then I present recent data from our group.

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.

For more info, 
https://www.amazon.com/dp/B01G48A88A