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GNPS - Metabolomics - Cholesterol-Induced Phocaeicola sartorii Expansion

ABSTRACT: Blood serum and feces samples from a high-cholesterol diet mouse. Extracted with MeOH(100%) and MeOH/H2O 50/50, respectively. Analyzed with a 10 cm Polar C18 column, 20 minutes gradient elution. Internal standard: Sulfamethazine, sulfadimethoxine.

INSTRUMENT(S): Orbitrap Exploris 120

ORGANISM(S): Mus Musculus (ncbitaxon:10090)

SUBMITTER: Heejung Yang

PROVIDER: MSV000098456 | GNPS | Tue Jul 08 18:22:00 BST 2025

REPOSITORIES: GNPS

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Project description:Cholesterol has attracted significant attention as a possible lifespan regulator. It has been reported that serum cholesterol levels have an impact on mortality due to age-related disorders such as cardiovascular disease. Diet is also known to be an important lifespan regulator. Dietary restriction retards the onset of age-related diseases and extends lifespan in various organisms. Although cholesterol and dietary restriction are known to be lifespan regulators, it remains to be established whether cholesterol is involved in dietary restriction-induced longevity. Here, we show that cholesterol deprivation suppresses longevity induced by intermittent fasting, which is one of the dietary restriction regimens that effectively extend lifespan. We also found that cholesterol is required for the fasting-induced upregulation of transcriptional target genes such as the insulin/IGF-1 pathway effector DAF-16 and that cholesterol deprivation suppresses the long lifespan of the insulin/IGF-1 receptor daf-2 mutant. Remarkably, we found that cholesterol plays an important role in the fasting-induced nuclear accumulation of DAF-16. Moreover, knockdown of the cholesterol-binding protein NSBP-1, which has been shown to bind to DAF-16 in a cholesterol-dependent manner and to regulate DAF-16 activity, suppresses both fasting-induced longevity and DAF-16 nuclear accumulation. Furthermore, this suppression was not additive to the cholesterol deprivation-induced suppression, which suggests that NSBP-1 mediates, at least in part, the action of cholesterol to promote fasting-induced longevity and DAF-16 nuclear accumulation. These findings identify a novel role for cholesterol in the regulation of lifespan. Two independent replicates were performed. Total RNA was extracted with TRIzol (Invitrogen). The extracted RNA was purified with PureLink RNA Micro Kit (Invitrogen) and analyzed with Agilent 2100 Bioanalyzer to assess the RNA integrity. The microarray procedures were performed according to Affymetrix protocols. Hybridized arrays were scanned using an Affymetrix GeneChip Scanner.

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GNPS - Metabolomics - Cholesterol-Induced Phocaeicola sartorii Expansion

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