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Stem cell aging in the Drosophila ovary

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Abstract

Accumulating evidence suggests that with time human stem cells may become defective or depleted, thereby contributing to aging and aging-related diseases. Drosophila provides a convenient model system in which to study stem cell aging. The adult Drosophila ovary contains two types of stem cells: the germ-line stem cells give rise to the oocyte and its supporting nurse cells, while the somatic stem cells give rise to the follicular epithelium—a highly differentiated tissue that surrounds each oocyte as it develops. Genetic and transgenic analyses have identified several conserved signaling pathways that function in the ovary to regulate stem cell maintenance, division and differentiation, including the wingless, hedgehog, JAK/STAT, insulin and TGF-β pathways. During Drosophila aging the division of the stem cells decreases dramatically, coincident with reduced egg production. It is unknown if this reproductive senescence is due to a defect in the stem cells themselves, or due to the lack of signals normally sent to the stem cells from elsewhere in the animal, such as from the central nervous system or the stem cell niche. Methods are being developed to genetically mark stem cells in adult Drosophila and measure their survival, division rate and function during aging.

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  1. Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, 835 W. 37th St., University Park, Los Angeles, CA, 90089-1340, USA

    Morris Waskar, Yishi Li & John Tower

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  1. Morris Waskar
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  2. Yishi Li
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Correspondence to John Tower.

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Waskar, M., Li, Y. & Tower, J. Stem cell aging in the Drosophila ovary. AGE 27, 201–212 (2005). https://doi.org/10.1007/s11357-005-2914-1

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