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Nathan Goodyear

Testosterone: More Than Having the Guts to Win the Tour de France - 0 views

www.sciencedirect.com/...S1074761313003439

Testosterone gut flora gut microbiome gut microbiota autoimmune disease diabetes

shared by Nathan Goodyear on 30 Apr 15 - No Cached
  • female adult mice have microbiomes similar to those of prepubescent mice of both sexes;
  • the commensal microbial community in adult male mice significantly deviates from this shared initial pool.
  • the microbiome in castrated adult males clearly shifts away from that of normal adult males and is closer to the microbiome of females
  • ...10 more annotations...
  • The incidence of T1D in these mice is positively correlated with the “femaleness” of the microbiota
  • These results support the hypothesis that the host androgen level is influential in determining the composition of the microbiota, which in turn affects T1D initiation and progression
  • a high testosterone level enriches the microbiota for specific organisms such as segmented filamentous bacteria (SFB) and Escherichia coli or Shigella–like (SECS) strains.
  • A minimum level of testosterone and specific male-enriched microbes working together upregulate M2 macrophage and IFN-γ producing T cells in pancreatic lymph nodes. Microarray data show that both the IFN-γ and IL-1β pathways are also stimulated.
  • These microbes also upregulate host testosterone
  • In four independent experiments, the authors found no universal unique “male microbiome”
  • they did find that four distinct combinations of microbial groupings (with an interesting lack of overlap at the individual family level in the four experiments) were enhanced by androgen
  • one species consists of the segmented filamentous bacteria (SFB) and belongs to the Firmicutes, whereas the other is an Escherichia coli or Shigella–like (SECS) strain belonging to the Proteobacteria
  • colonization with protective microbiomes—e.g., SPF microbiota, SFB, and SECS—is positively correlated with high blood testosterone levels in male mice
  • A direct implication of this study is that probiotic administration or fecal transplantation is a theoretically possible approach to protection against T1D
  • Nathan Goodyear on 30 Apr 15
     
    nice summary of article on the relationship between Testosteorne and gut microbiome in autoimmune disease.
Nathan Goodyear

Fecal microbiota transplant overcomes resistance to anti-PD-1 therapy in melanoma patie... - 0 views

science.sciencemag.org/...595

immunotherapy gut bacteria melanoma cancer PD-1 gut flora gut microbiota gut microbiome

shared by Nathan Goodyear on 07 Feb 21 - No Cached
  • Nathan Goodyear on 07 Feb 21
     
    Fecal transplant study. Gut microbes improve efficacy of anti-PD-1 therapy immunotherapy.
Nathan Goodyear

ftp://www.bf.lu.lv/grozs/MolekularasBiologijas/Imunol%20II/Publik%C4%81cijas%20semin%C4... - 0 views

www.bf.lu.lv/...ent%20regulation%20of%20AI.pdf

gut flora gut microbiome gut microbiota gut Testosterone hormone hormones autoimmune disease

shared by Nathan Goodyear on 30 Apr 15 - No Cached
  • Nathan Goodyear on 30 Apr 15
     
    full article to previous abstract:  fecal transplant from male mice to female mice resulted in an increase in Testosterone production in the female mice revealing a link between the gut microbial population, diversity and Testosterone production.
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