[The Molecular Switches and Atomic Biological Mechanisms Underlying the Physiological and Pathophysio-logical Effects of Hydrogen Sulfide to Regulate Its "Receptors"].

Hydrogen sulfide (H2S)has emerged as pivotal signaling molecules since it is recognized as the third gasotransmitter together with nitric oxide and carbon monoxide. The development of detecting technologies contributed to the research in H2S biology.H2S plays significant roles in human body systems, such as the cardiovascular system, nervous system, respiratory system etc.. Alterations of H2S concentrations have been connected with many diseases. Hypertension, atherosclerosis, neurodegenerative disorder, asthma and many other diseases are found to be related with abnormal H2S metabolism. It has become a potential drug for therapeutic purposes. Understanding the mechanism of H2S biology, including a molecular switch contained in its "receptor", has deepened the research on how small molecules regulate big molecules, as well as providing new strategy for the therapeutic approaches for varies of diseases.