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A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging

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Relationship between catalase haplotype and arterial aging.

Valérie Nivet-Antoine¹, Carlos Labat, Said El Shamieh

¹AP-HP, Hôpital Européen Georges Pompidou, Service de Biochimie, Paris, France. valerie.nivet-antoine@parisdescartes.fr

Atherosclerosis

|January 24, 2013

Summary

A specific catalase (CAT) gene variation, the CAT2 haplotype, is linked to arterial aging, increasing carotid artery diameter and atheromatous plaques. The CAT1 haplotype appears protective against these aging markers.

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Area of Science:

Cardiovascular Science
Genetics
Aging Research

Background:

Arterial aging is a significant factor in cardiovascular disease, the leading cause of death in older adults.
Oxidative stress and the antioxidant enzyme catalase (CAT) are implicated in endothelial cell function and arterial aging.
Identifying novel risk factors for arterial aging is crucial for public health strategies.

Purpose of the Study:

To investigate the association between catalase (CAT) gene haplotypes and arterial aging phenotypes.
To analyze relationships with common carotid artery (CCA) diameter, intima-media thickness, and atheromatous plaques in French cohorts.

Main Methods:

Genotyping of the Catalase rs769214 single nucleotide polymorphism (SNP) in 564 individuals from the ERA and STANISLAS cohorts.
Measurement of blood pressure, CCA intima-media thickness, CCA internal diameter, and atheromatous plaque count.
Haplotype analysis to determine the influence of CAT variants on arterial aging markers.

Main Results:

A specific CAT haplotype (CAT2) was associated with increased CCA internal diameter and a higher number of atheromatous plaques.
The CAT2 haplotype emerged as an independent risk factor for arterial aging.
These findings were observed alongside established risk factors like age, blood pressure, and BMI.

Conclusions:

Catalase (CAT) haplotypes play a significant role in the process of arterial aging.
The CAT1 haplotype demonstrates a protective effect, potentially reducing CCA diameter and atheromatous plaque formation.
This research underscores the importance of genetic factors in arterial aging and associated cardiovascular risks.