H2S-induced thiol-based redox switches: Biochemistry and functional relevance for inflammatory diseases

Abstract During the last decades, small inorganic molecules like reactive oxygen species (ROS), nitric oxide (NO), carbon monoxide (CO) and even the highly toxic hydrogen sulfide (H 2 S) have been evolved as important signaling molecules that trigger crucial cellular processes by regulating the activity of kinases, phosphatases and transcription factors. These redox molecules use similar target structures and therefore, the composition of the complex ⿿redox environment⿿ determines the final outcome of signaling processes and may subsequently also affect the behavior of a cell in an inflammatory environment. Here, we discuss the role of H 2 S in this complex interplay with a focus on the transcription factors Nrf2 and NFκB.