Senolytic Combination of Dasatinib and Quercetin Alleviates Intestinal Senescence and Inflammation and Modulates the Gut Microbiome in Aged Mice

Tatiana Dandolini Saccon, Ravinder Nagpal, Hariom Yadav, Marcelo Borges Cavalcante, Allancer Divino De Carvalho Nunes, Augusto Schneider, Adam Gesing, Brian Hughes, Matthew Yousefzadeh, Tamar Tchkonia, James L. Kirkland, Laura J. Niedernhofer, Paul D. Robbins, Michal M. Masternak

Research output: Contribution to journalArticlepeer-review

Abstract

Cellular senescence contributes to age-related disorders including physical dysfunction, disabilities, and mortality caused by tissue inflammation and damage. Senescent cells accumulate in multiple tissues with aging and at etiological sites of multiple chronic disorders. The senolytic drug combination, Dasatinib plus Quercetin (D+Q), is known to reduce senescent cell abundance in aged mice. However, the effects of long-term D+Q treatment on intestinal senescent cell and inflammatory burden and microbiome composition in aged mice remain unknown. Here, we examine the effect of D+Q on senescence (p16Ink4a and p21Cip1) and inflammation (Cxcl1, Il1β, Il6, Mcp1, and Tnfα) markers in small (ileum) and large (caecum and colon) intestine in aged mice (n = 10) compared to age-matched placebo-treated mice (n = 10). Additionally, we examine microbial composition along the intestinal tract in these mice. D+Q-treated mice show significantly lower senescent cell (p16 and p21 expression) and inflammatory (Cxcl1, Il1β, Il6, Mcp1, and Tnfα expression) burden in small and large intestine compared with control mice. Further, we find specific microbial signatures in ileal, cecal, colonic, and fecal regions that are distinctly modulated by D+Q, with modulation being most prominent in small intestine. Further analyses reveal specific correlation of senescence and inflammation markers with specific microbial signatures. Together, these data demonstrate that the senolytic treatment reduces intestinal senescence and inflammation while altering specific microbiota signatures and suggest that the optimized senolytic regimens might improve health via reducing intestinal senescence, inflammation, and microbial dysbiosis in older subjects.

Original languageEnglish (US)
Pages (from-to)1895-1905
Number of pages11
JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
Volume76
Issue number11
DOIs
StatePublished - Nov 1 2021

Keywords

  • Biology of aging
  • Cellular senescence
  • Longevity
  • Microbiome
  • Microbiota

ASJC Scopus subject areas

  • Aging
  • Geriatrics and Gerontology

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