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Integrated multi-omics reveals adaptive anti-oxidant remodeling in early alcohol-associated liver disease
Alcohol-associated liver disease (ALD) is a leading cause of liver-related morbidity and mortality. Although various omics approaches have revealed early metabolic alterations, individual datasets provide limited mechanistic insight. Here, we integrated RNA sequencing with mass spectrometry-based analyses to quantify gene expression, protein abundance, proteome and acetylome dynamics, and metabolic fluxes in livers of alcohol-fed mice.
SOD1 Catalyses Thiol Oxidation to Thiosulfinates
Cu/Zn superoxide dismutase (SOD1) is canonically regarded as a superoxide scavenging antioxidant yet is paradoxically associated with multiple diseases. Here, we show that SOD1 catalyzes thiol oxidation to thiosulfinates (RS(O)SR), revealing a previously unrecognized copper mediated oxidant forming reaction in biology. Steady state kinetics demonstrate robust, O2 dependent thiol consumption, and ATR FTIR spectra of the SOD1-cysteine reaction display S--O bands ({approx}1042/1169 cm-1)...