An RNAi screen identifies genes that regulate GABA synapses

Amy B. Vashlishan, Jon M. Madison, Mike Dybbs, Jihong Bai, Derek Sieburth, QueeLim Ch'ng, Masoud Tavazoie, Joshua M. Kaplan

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)


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 90 genes, 21 of which were previously implicated in seizure syndromes, suggesting that this screen has effectively identified candidate genes for epilepsy. Electrophysiological recordings and imaging of excitatory and inhibitory synapses indicate that several genes alter muscle activity by selectively regulating GABA transmission. In particular, we identify two humoral pathways and several protein kinases that modulate GABA transmission but have little effect on excitatory transmission at cholinergic neuromuscular junctions. Our data suggest these conserved genes are components of signaling pathways that regulate GABA transmission and consequently may play a role in epilepsy and other cognitive or psychiatric disorders.

Original languageEnglish
Pages (from-to)346-361
Number of pages16
Issue number3
Early online date7 May 2008
Publication statusPublished - 8 May 2008


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