Germline Genetics of the p53 Pathway Affect Longevity in a Gender Specific Manner

ISSN: 1874-6128 (Online)
ISSN: 1874-6098 (Print)


Volume 7, 3 Issues, 2014


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Current Aging Science

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Editor-in-Chief:
Prof. Debomoy K. Lahiri
Department of Psychiatry Indiana University School of Medicine
Indianapolis, IN
USA


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Germline Genetics of the p53 Pathway Affect Longevity in a Gender Specific Manner

Author(s): Sebastian Grob, Immel Uta-Dorothee, Michael Klintschar and F. Bartel

Affiliation: Institute of Pathology, Medical Faculty, Martin-Luther-University of Halle-Wittenberg, Magdeburger Str. 14, 06097 Halle/S., Germany

Abstract

Aging is thought to occur through the accumulation of molecular and cellular damage. A key regulator of the cell’s stress response is p53. In mice, the activity of p53 associates with lifespan. We were therefore interested whether SNPs in members of the p53-pathway are associated with longevity in humans. We genotyped the following SNPs: p53 – rs1042522 (Arg72Pro), MDM2 – rs2279744 (SNP309), MDM4 – rs4245739 (SNP34091), rs1563828 (SNP31826), PPP2R2B -rs319217 in 155 long-lived individuals (LLIs) who died at the age of 91 and over and in 171 ethnically-matched control subjects. Kaplan-Meier survival curves and log-Rank-test were used to determine the mean and median survival times. In female LLIs, the Pro-allele of rs1042522 (Arg72Pro) and the G-allele of rs2279744 (SNP309) were significantly associated with an increased survival time (P =0.026, P <0.001, respectively, log-Rank-test). In contrast, there was no difference regarding the survival time in male LLIs (rs1042522: P=0.58, rs2279744: P =0.503, log-Rank-test). There was no difference regarding the average age of death for the genotypes of the respective SNPs in the MDM4 gene (rs1563828: P =0.99; rs4245739: P =0.179, respectively). Here we show for the first time that the G-allele of rs2279744 (SNP309) is associated with increased lifespan. Importantly, this effect is gender-specific. Our data support the hypothesis that genetic variants that are associated with lower activity of p53 - and therefore increased tumor risk – are associated with prolonged lifespan in a gender-specific manner

Keywords: Aging, MDM2, MDM4, p53, polymorphism, tumor suppression

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Article Details

Volume: 7
First Page: 1
Last Page: 10
Page Count: 10
DOI: 10.2174/1874609807666140321150751
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