Hydrogen sulfide donor (H₂S donor)

Hydrogen sulfide donors are a chemically diverse group of molecules specifically designed to release hydrogen sulfide (H₂S) under biological conditions at controlled rates, enabling the study and therapeutic exploitation of H₂S’s signaling properties. Unlike classical molecular drug targets (such as enzymes, receptors, or ion channels), these donors act as *prodrug-like carriers* for H₂S, allowing exogenous manipulation of this gasotransmitter’s concentration in tissues. H₂S itself is a gasotransmitter comparable to nitric oxide, involved in numerous biological processes including vasodilation, neuromodulation, mitochondrial function, regulation of apoptosis, oxidative stress reduction, and anti-inflammation [2][4][6]. Researchers use H₂S donors such as GYY4137, NaHS, and novel synthetic molecules to explore protective effects in models of cardiovascular disease, neurodegeneration, diabetes, and cancer [3][5][7]. The activity and safety of these donors depend on their release rates and byproducts. There is no known endogenous "hydrogen sulfide donor" protein or receptor; these are *synthetic research tools and potential drug modalities*, not a molecular drug target in the classical sense.

Other names

H₂S-releasing compoundH₂S prodrughydrogen sulphide-releasing donor

Controlled release of H₂S, leading to sulfhydration (persulfidation) of protein cysteine residues, modulation of redox state, alteration of cellular signaling pathways such as vasodilation (relaxation of smooth muscle), mitochondrial protection, reduction of oxidative stress, and anti-inflammatory effects