Nov 13, 2014 New research in flies shows how cells in adult reproductive organs maintain their sexual identity. The study, publishing online on November 13 in the Cell Press journal Developmental Cell, also identified a mutation that can switch the cells' sexual identity. The findings could lead to new insights on how to alter cells for therapeutic purposes. Sperm and eggs are made from germ cells, but instructions from their neighboring support cellscalled somatic cellsare also essential for their development. By studying the formation of sperm in fruit flies, which is remarkably similar to the process that occurs in people, investigators serendipitously found a mutation that gave testes a very unusual appearance. "Rather than becoming sperm, germ cells were stuck at an early stage, and they were surrounded by support cells that looked suspiciously like those belonging in an ovary," says senior author Dr. Erika Matunis of The Johns Hopkins School of Medicine. Her research team found that the mutation blocked the function of a specific gene in the stem cells that becomes support cells in the testis, causing the fruit flies to change from a male to a female identity. The research is the first to show that adult … Continue reading
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