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Science 12 August 2005:
Vol. 309. no. 5737, pp. 1071 - 1073
DOI: 10.1126/science.1111410
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Reports

Direct Control of Germline Stem Cell Division and Cyst Growth by Neural Insulin in Drosophila

Leesa LaFever and Daniela Drummond-Barbosa*

Stem cells reside in specialized niches that provide signals required for their maintenance and division. Tissue-extrinsic signals can also modify stem cell activity, although this is poorly understood. Here, we report that neural-derived Drosophila insulin-like peptides (DILPs) directly regulate germline stem cell division rate, demonstrating that signals mediating the ovarian response to nutritional input can modify stem cell activity in a niche-independent manner. We also reveal a crucial direct role of DILPs in controlling germline cyst growth and vitellogenesis.

Department of Cell and Developmental Biology, Vanderbilt University Medical Center, 4120B Medical Research Building III, 465 21st Avenue South, Nashville, TN 37232–8240, USA.

* To whom correspondence should be addressed. E-mail: daniela.drummond-barbosa{at}vanderbilt.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Drosophila germ-line modulation of insulin signaling and lifespan.
T. Flatt, K.-J. Min, C. D'Alterio, E. Villa-Cuesta, J. Cumbers, R. Lehmann, D. L. Jones, and M. Tatar (2008)
PNAS 105, 6368-6373
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Stem Cell Niche: Microenvironment and Beyond.
J. Zhang and L. Li (2008)
J. Biol. Chem. 283, 9499-9503
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Jak/Stat signalling in niche support cells regulates dpp transcription to control germline stem cell maintenance in the Drosophila ovary.
L. Lopez-Onieva, A. Fernandez-Minan, and A. Gonzalez-Reyes (2008)
Development 135, 533-540
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Tumbling, an Interactive Way to Move Forward.
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Timing of Dietary Estrogenic Exposures and Breast Cancer Risk.
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Natural variation in Drosophila melanogaster diapause due to the insulin-regulated PI3-kinase.
K. D. Williams, M. Busto, M. L. Suster, A. K.-C. So, Y. Ben-Shahar, S. J. Leevers, and M. B. Sokolowski (2006)
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Mutations that increase the life span of C. elegans inhibit tumor growth..
J. M. Pinkston, D. Garigan, M. Hansen, and C. Kenyon (2006)
Science 313, 971-975
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Science. ISSN 0036-8075 (print), 1095-9203 (online)