Molecular regulation of pluripotency in the mammalian germline

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Germ cells generate sperm in males or oocytes in females. In males, germ cell numbers are tightly controlled in the embryo, with too few germ cells causing infertility, and unrestrained germ cell numbers leading to testicular cancer. We have discovered a molecular mechanism that regulates germ cells in the embryo, and propose to study in mice how this regulation is accomplished and the consequences of defective regulation, in order to learn more about how infertility and testis cancer arise.