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Backgrounds Arsenite is a naturally occurring mitochondrial toxin that generates oxidative stress in vivo. Previously, we have reported that SPHK-1/sphingosine kinase plays a critical role in promoting survival following arsenite exposure in C. elegans. However, the molecular mechanism by which SPHK-1 confers resistance to arsenite-induced toxicity is not known. Methods Using a combination of genetic,...
Rhythmic behaviors are driven by endogenous biological clocks in pacemakers, which must reliably transmit timing information to target tissues that execute rhythmic outputs. During the defecation motor program in C. elegans, calcium oscillations in the pacemaker (intestine), which occur about every 50 s, trigger rhythmic enteric muscle contractions through downstream GABAergic neurons that innervate...
GABA synapses play a critical role in many aspects of circuit development and function. For example, conditions that perturb GABA transmission have been implicated in epilepsy. To identify genes that regulate GABA transmission, we performed an RNAi screen for genes whose inactivation increases the activity of C. elegans body muscles, which receive direct input from GABAergic motor neurons. We identified...
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