RRC ID 6434
著者 Walker DS, Vázquez-Manrique RP, Gower NJ, Gregory E, Schafer WR, Baylis HA.
タイトル Inositol 1,4,5-trisphosphate signalling regulates the avoidance response to nose touch in Caenorhabditis elegans.
ジャーナル PLoS Genet
Abstract When Caenorhabditis elegans encounters an unfavourable stimulus at its anterior, it responds by initiating an avoidance response, namely reversal of locomotion. The amphid neurons, ASHL and ASHR, are polymodal in function, with roles in the avoidance responses to high osmolarity, nose touch, and both volatile and non-volatile repellents. The mechanisms that underlie the ability of the ASH neurons to respond to such a wide range of stimuli are still unclear. We demonstrate that the inositol 1,4,5-trisphosphate receptor (IP(3)R), encoded by itr-1, functions in the reversal responses to nose touch and benzaldehyde, but not in other known ASH-mediated responses. We show that phospholipase Cbeta (EGL-8) and phospholipase Cgamma (PLC-3), which catalyse the production of IP(3), both function upstream of ITR-1 in the response to nose touch. We use neuron-specific gene rescue and neuron-specific disruption of protein function to show that the site of ITR-1 function is the ASH neurons. By rescuing plc-3 and egl-8 in a neuron-specific manner, we show that both are acting in ASH. Imaging of nose touch-induced Ca(2+) transients in ASH confirms these conclusions. In contrast, the response to benzaldehyde is independent of PLC function. Thus, we have identified distinct roles for the IP(3)R in two specific responses mediated by ASH.
巻・号 5(9)
ページ e1000636
公開日 2009-9-1
DOI 10.1371/journal.pgen.1000636
PMID 19730689
PMC PMC2729924
MeSH Animals Caenorhabditis elegans / genetics Caenorhabditis elegans / physiology* Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism Calcium / metabolism Inositol 1,4,5-Trisphosphate / metabolism* Inositol 1,4,5-Trisphosphate Receptors / genetics Inositol 1,4,5-Trisphosphate Receptors / metabolism Neurons, Afferent / metabolism Nose / physiology Signal Transduction* Touch
IF 5.175
引用数 15
WOS 分野 GENETICS & HEREDITY
リソース情報
線虫 tm1340