RRC ID 53535
Author Singhvi A, Liu B, Friedman CJ, Fong J, Lu Y, Huang XY, Shaham S.
Title A Glial K/Cl Transporter Controls Neuronal Receptive Ending Shape by Chloride Inhibition of an rGC.
Journal Cell
Abstract Neurons receive input from the outside world or from other neurons through neuronal receptive endings (NREs). Glia envelop NREs to create specialized microenvironments; however, glial functions at these sites are poorly understood. Here, we report a molecular mechanism by which glia control NRE shape and associated animal behavior. The C. elegans AMsh glial cell ensheathes the NREs of 12 neurons, including the thermosensory neuron AFD. KCC-3, a K/Cl transporter, localizes specifically to a glial microdomain surrounding AFD receptive ending microvilli, where it regulates K(+) and Cl(-) levels. We find that Cl(-) ions function as direct inhibitors of an NRE-localized receptor-guanylyl-cyclase, GCY-8, which synthesizes cyclic guanosine monophosphate (cGMP). High cGMP mediates the effects of glial KCC-3 on AFD shape by antagonizing the actin regulator WSP-1/NWASP. Components of this pathway are broadly expressed throughout the nervous system, suggesting that ionic regulation of the NRE microenvironment may be a conserved mechanism by which glia control neuron shape and function.
Volume 165(4)
Pages 936-48
Published 2016-5-5
DOI 10.1016/j.cell.2016.03.026
PII S0092-8674(16)30322-1
PMID 27062922
PMC PMC4860081
MeSH Animals Caenorhabditis elegans / metabolism* Caenorhabditis elegans Proteins / chemistry Caenorhabditis elegans Proteins / metabolism Cyclic GMP / metabolism Guanylate Cyclase / chemistry Guanylate Cyclase / metabolism Neuroglia / metabolism* Potassium / metabolism Protein Domains Sensory Receptor Cells / metabolism* Symporters / chemistry Symporters / genetics Symporters / metabolism* Thermosensing
IF 38.637
Times Cited 27
C.elegans tm3649 tm3098 tm949