Reactive Oxygen Species (ROS) Substrate

Homoeriodictyol chalcone (2',4,4',6'-Tetrahydroxy-3-methoxychalcone; 3-Methoxy-2',4',6',4-tetrahydroxychalcone) is a non-selective antioxidant radical scavenger that neutralizes reactive oxygen species (ROS). Homoeriodictyol chalcone is promising for research of neurodegenerative diseases (e.g., Alzheimer’s), inflammatory disorders, and cancers.

8-Oxo-GTP is an oxidized guanine nucleotide, produced by reactive oxygen species (ROS). 8-Oxo-GTP serves as a substrate for MutT protein, GTP cyclohydrolase II, Mycobacterium tuberculosis MutT1, and Mycobacterium tuberculosis Rv1700, which hydrolyze it to corresponding nucleoside monophosphates or diphosphates. 8-Oxo-GTP causes detrimental effects including mutations and mistranslation when incorporated into nucleic acids. 8-Oxo-GTP can be used for the research of cancer and tuberculosis.

TMPO (3,3,5,5-Tetramethyl-1-pyrroline 1-oxide) is a spin trap targeting free radicals. TMPO is capable of scavenging superoxide, hydroxyl radicals and inhibits thymocyte apoptosis with EC₅₀ values of 19.1 mM (MPS-induced) to 30.7 mM (Etoposide-induced) for inhibiting DNA fragmentation. TMPO reacts with intracellular free radicals to form stable nitroxide radical products, reducing oxidative stress (e.g., decreasing peroxide levels, maintaining glutathione content) and blocking oxidative events in the apoptotic pathway. TMPO is promising for research of apoptosis in immune cells like thymocytes.