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. 2008 Dec;1(2):117-25.
doi: 10.1161/CIRCGENETICS.108.802652. Epub 2008 Dec 9.

Sex and age dimorphism of myocardial gene expression in nonischemic human heart failure

David R Fermin  1 , Ana Barac, Sangjin Lee, Sean P Polster, Sridhar Hannenhalli, Tracy L Bergemann, Suzanne Grindle, David B Dyke, Francis Pagani, Leslie W Miller, Sarah Tan, Cris Dos Remedios, Thomas P Cappola, Kenneth B Margulies, Jennifer L Hall
Affiliations

Sex and age dimorphism of myocardial gene expression in nonischemic human heart failure

David R Fermin et al. Circ Cardiovasc Genet. 2008 Dec.

Abstract

Background: We report the first comprehensive analysis of gene expression differences by sex and age in left ventricular samples from 102 patients with dilated cardiomyopathy.

Methods and results: Gene expression data (HG-U133A gene chip, Affymetrix) were analyzed from 30 females and 72 males from 3 separate centers. More than 1800 genes displayed sexual dimorphism in the heart (adjusted P value <0.05). A significant number of these genes were highly represented in gene ontology pathways involved in ion transport and G-protein-coupled receptor signaling. Localization of these genes revealed enrichment on both the sex chromosomes as well as chromosomes 3, 4, and 14. The second goal of this study was to determine the effect of age on gene expression. Within the female cohort, >140 genes were differentially expressed in the <55 years age group compared with the >55 years age group. These genes were highly represented in gene ontology pathways involved in DNA damage. In contrast, zero genes in the male cohort <55 years met statistical significance when compared with the >55 years age group.

Conclusions: Gene expression in dilated cardiomyopathy displayed evidence of sexual dimorphism similar to other somatic tissues and age dimorphism within the female cohort.

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Figures

Figure 1
Figure 1
Bar graphs illustrate the chromosomal distribution of differentially expressed genes in the whole male versus female cohort; lighter bars represent the significant genes on each chromosome; the number of unique genes assayed on each chromosome is represented by the total height of each bar. The table below the graph lists chromosomes that passed the test for enrichment by Fisher exact test with Benjamini correction, P < 0.05.
See this image and copyright information in PMC

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