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- W2906688168 abstract "Summary Background Disseminated superficial actinic porokeratosis (DSAP) is a rare autosomal dominant disease. In our previous research, we found that a linkage region of DSAP in a large family is located at 12q23·2-q24·1. Subsequently, the mevalonate kinase gene (MVK) was shown to be pathogenic in DSAP. Objectives To elucidate the mechanism by which MVK mutations lead to keratinocyte apoptosis and DSAP, and to report a new missense mutation, c.566 C>T (p.A189V), in MVK in a Chinese DSAP pedigree. Methods The half-life of wild-type (WT) MVK protein and mutants was assessed using cycloheximide treatment of cells. Dimerization of MVK was analysed by coimmunoprecipitation and glutathione S transferase pull-down assay. MVK kinase activity, production of cell cholesterol, mitochondrial complex activity and apoptosis were detected, using the corresponding commercial kits, in cells overexpressing MVK WT and mutants. Results Mechanically, we demonstrated that both the pathogenic p.A189V mutant and a sporadic mutation p.H312R (c.935A>G), which we reported previously, have rapid degradation, decreased kinase activity and reduced production of cell cholesterol. Also, we found the p.H312R mutation confers on the MVK protein an inability to dimerize. Further, we demonstrated that the mutants are impaired in mitochondrial function and lead to increased apoptosis. Conclusions Our results provide an important basis for elucidating the mechanism by which MVK missense mutations contribute to DSAP." @default.
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- W2906688168 date "2019-08-01" @default.
- W2906688168 modified "2023-09-27" @default.
- W2906688168 title "Novel mutations in mevalonate kinase cause disseminated superficial actinic porokeratosis" @default.
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- W2906688168 doi "https://doi.org/10.1111/bjd.17596" @default.
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