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Developmental defects in a Caenorhabditis elegans model for type III galactosemia.

Genetics (2014-10-10)
Ana M Brokate-Llanos, José M Monje, Piedad Del Socorro Murdoch, Manuel J Muñoz
ABSTRACT

Type III galactosemia is a metabolic disorder caused by reduced activity of UDP-galactose-4-epimerase, which participates in galactose metabolism and the generation of various UDP-sugar species. We characterized gale-1 in Caenorhabditis elegans and found that a complete loss-of-function mutation is lethal, as has been hypothesized for humans, whereas a nonlethal partial loss-of-function allele causes a variety of developmental abnormalities, likely resulting from the impairment of the glycosylation process. We also observed that gale-1 mutants are hypersensitive to galactose as well as to infections. Interestingly, we found interactions between gale-1 and the unfolded protein response.

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