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• W3014187927 endingPage "2520" @default.
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• W3014187927 abstract "Cystathionine β-synthase (CBS) is a housekeeping enzyme that catalyzes the first step of the homocysteine to cysteine transsulfuration pathway. Homozygous deletion of the Cbs gene in mice causes severe hyperhomocysteinemia and reduces life span. Here, we examined a possible involvement of senescence, mitochondrial DNA, and telomeres in the reduced life span of Cbs−/− mice. We found that senescence-related p21, Pai-1, Mcp1, and Il-6 mRNAs were significantly upregulated (2–10-fold) in liver, while p21 was upregulated in the brain of Cbs−/− mice (n = 20) compared with control Cbs+/− siblings (n = 20) in a sex- and age-dependent manner. Telomere length in blood (n = 80), liver (n = 40), and brain (n = 40) was not affected by the Cbs−/− genotype, but varied with sex and/or age. Levels of mitochondrial DNA tended to be reduced in livers, but not brains and blood, of Cbs−/− females (n = 20–40). The Cbs−/− genotype significantly reduced Tert mRNA expression in brain, but not liver, in a sex- and age-dependent manner. Multiple regression analysis showed that the senescence-related liver (but not brain) mRNAs and liver (but not brain or blood) mitochondrial DNA were associated with the Cbs genotype. In contrast, telomere length in blood, brain, and liver was not associated with the Cbs genotype or hyperhomocysteinemia, but was associated with sex (in brain and liver) and age (in brain and blood). Taken together, these findings suggest that the changes in senescence marker expression and mtDNA levels, but not telomere shortening, could account for the reduced life span of Cbs−/− mice." @default.
• W3014187927 created "2020-04-10" @default.
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• W3014187927 date "2020-04-05" @default.
• W3014187927 modified "2023-10-17" @default.
• W3014187927 title "The Cbs Locus Affects the Expression of Senescence Markers and mtDNA Copy Number, but not Telomere Dynamics in Mice" @default.
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• W3014187927 doi "https://doi.org/10.3390/ijms21072520" @default.
• W3014187927 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7177707" @default.
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