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UT Southwestern researchers identify hundreds of genes controlling female fertility
Date:9/21/2007

DALLAS Sept. 21, 2007 Researchers at UT Southwestern Medical Center have found nearly 350 genes related to female fertility. Their research may open the door to much wider study in the poorly understood field of infertility.

This study gives us a way to begin to understand the causes of female infertility, said Dr. Diego Castrillon, assistant professor of pathology and senior author of a study appearing in the September issue of the journal Genetics. It gives us a much more complete list of candidate genes to explore. Before, we didnt even know where to look.

The study was done in mice, but at the molecular level, ovarian biology is very similar in mice and humans, Dr. Castrillon said.

These discoveries might lead the way to eventually allowing clinicians to test whether an infertile woman has problems with a specific gene, allowing for improved diagnostic tests and tailored therapy in the future, said Dr. Castrillon, a specialist in the diagnosis of infertility and other diseases of women.

About 13 percent of women suffer from infertility, with the most common cause being dysfunction of the ovary. Researchers suspected genetic links in many cases, Dr. Castrillon said.

In mammals, the ovaries go through a developmental stage after birth in which egg cells become nestled in dormant nests called primordial follicles. Later in development, the follicles become activated by a process that researchers dont fully understand, and at puberty, egg cells begin being released for fertilization. The researchers focused on a gene called Foxo3, which controls follicle activation. Normally, follicles are activated on a staggered schedule, so an ovary contains follicles at many different stages of development.

In female mice genetically engineered to lack Foxo3, the follicles are normal at birth, but later become activated all at the same time. This coordinated maturation meant that the genes controlling
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Contact: Aline McKenzie
aline.mckenzie@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert

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