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“These results suggest that ethanol reduces NOS activity by modulating the conformation of the enzyme and thereby its stability, probably by interacting with the binding sites of BH4 and/or of L-arginine.”
“While ethanol had no effect on cardiac BH4 levels, BH4 (19 mg/kg, i.v) supplementation paradoxically caused cardiac oxidative stress, but mitigated the cardiac dysfunction/hypotension and most of the adverse molecular responses caused by ethanol.”