Are females more variable than males in gene expression? Meta-analysis of microarray datasets.

ABSTRACT:

Background

The majority of preclinical biomedical research involves studies of males rather than females. It is thought that researchers have avoided females based on the idea that female traits are more variable than those of males because of cyclic variation in effects of ovarian hormones.

Methods

To test the assumption of inherently greater female variability, we analyzed 293 microarray datasets measuring gene expression in various tissues of mice and humans, comprising analysis of more than 5 million probes.

Results

Meta-analysis showed that on average, male gene expression is slightly more variable than that of females although the difference is small. We also tested if the X chromosome of humans shows greater variability in gene expression in males than in femal

SUBMITTER: Itoh Y 

PROVIDER: S-EPMC4640155 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature