Abstract
RNA-mediated interference (RNAi) was employed to systematically inactivate the four subunits of complex II in the mitochondrial electron transport chain. Embryonic lethality was the predominant result of inactivating three subunits (ceSDHB, ceSDHC, and ceSDHD) when using the soaking method to inactivate RNA. The feeding method was employed to deliver dsRNA from the fourth subunit (ceSDHA) to wild-type, mev-1 (mutated in ceSDHC of complex II), and gas-1 animals (mutated in a complex I gene). Survival was reduced only in the mev-1 genetic background, and in an oxygen-dependent fashion. Collectively, these data provide further evidence that compromised complex II integrity can result in sensitivity to oxidative stress.
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