Hedgehog Signalling in Spermatogenesis

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Male fertility requires sufficient production of healthy sperm in the testis. We discovered that cells in the adult testis communicate via the Hedgehog (Hh) signalling pathway as sperm develop. We propose to use a highly specific drug to inhibit Hh activity in order to delineate the precise steps in sperm production affected by Hh signalling. We will study the importance Hh in maintenance of spermatogonial stem cells and create mouse models to learn how it is controlled.