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Soma-Germ Line Competition for Lipid Phosphate Uptake Regulates Germ Cell Migration and Survival
A. D. Renault,1
Y. J. Sigal,2
A. J. Morris,2
R. Lehmann1*
Abstract:
Lipid phosphates can act as signaling molecules to influencecell division, apoptosis, and migration. wunen and wunen2 encodeDrosophila lipid phosphate phosphohydrolases, integral membraneenzymes that dephosphorylate extracellular lipid phosphates.wun and wun2 act redundantly in somatic tissues to repel migratinggerm cells, although the mechanism by which germ cells respondis unclear. Here, we report that wun2 also functions in germcells, enabling them to perceive the wun/wun2relatedsignal from the soma. Upon Wun2 expression, cultured insectcells dephosphorylate and internalize exogenously supplied lipidphosphate. We propose that Drosophila germ cell migration andsurvival are controlled by competition for hydrolysis of a lipidphosphate between germ cells and soma.
1 Howard Hughes Medical Institute, Developmental Genetics Program, Skirball Institute and Department of Cell Biology, New York University School of Medicine, 540 First Avenue, New York, NY 10016, USA. 2 Department of Cell and Developmental Biology, Room 522, Taylor Hall, CB#7090, University of North Carolina at Chapel Hill, Chapel Hill, NC 275997090, USA.
* To whom correspondence should be addressed. E-mail address: lehmann{at}saturn.med.nyu.edu
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