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• W2069752037 startingPage "49" @default.
• W2069752037 abstract "A powerful approach to understanding complex processes such as aging is to use model organisms amenable to genetic manipulation, and to seek relevant phenotypes to measure. Caenorhabditis elegans is particularly suited to studies of aging, since numerous single-gene mutations have been identified that affect its lifespan; it possesses an innate immune system employing evolutionarily conserved signaling pathways affecting longevity. As worms age, bacteria accumulate in the intestinal tract. However, quantitative relationships between worm genotype, lifespan, and intestinal lumen bacterial load have not been examined. We hypothesized that gut immunity is less efficient in older animals, leading to enhanced bacterial accumulation, reducing longevity. To address this question, we evaluated the ability of worms to control bacterial accumulation as a functional marker of intestinal immunity.We show that as adult worms age, several C. elegans genotypes show diminished capacity to control intestinal bacterial accumulation. We provide evidence that intestinal bacterial load, regulated by gut immunity, is an important causative factor of lifespan determination; the effects are specified by bacterial strain, worm genotype, and biologic age, all acting in concert.In total, these studies focus attention on the worm intestine as a locus that influences longevity in the presence of an accumulating bacterial population. Further studies defining the interplay between bacterial species and host immunity in C. elegans may provide insights into the general mechanisms of aging and age-related diseases." @default.
• W2069752037 created "2016-06-24" @default.
• W2069752037 creator A5023606467 @default.
• W2069752037 creator A5033749053 @default.
• W2069752037 creator A5048919835 @default.
• W2069752037 date "2012-01-01" @default.
• W2069752037 modified "2023-10-05" @default.
• W2069752037 title "Control of intestinal bacterial proliferation in regulation of lifespan in Caenorhabditis elegans" @default.
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• W2069752037 doi "https://doi.org/10.1186/1471-2180-12-49" @default.
• W2069752037 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3342110" @default.
• W2069752037 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22452899" @default.
• W2069752037 hasPublicationYear "2012" @default.
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