Reducing agents can activate different members of the transient receptor potential (TRP) superfamily of ion channels (TRPC1 and TRPC5) by breaking a disulphide bridge in the extracellular loop adjacent to the ion permation pore. A high concentration of the endogenous reducing agent, thioredoxin, is present in rheumatoid arthritis and may reduce secretion of matrix metalloproteinases by its inhibition of TRPC1 and TRPC5.
- Shang-Zhong Xu
- Piruthivi Sukumar
- David J. Beech