Molecular oxygen is a key substrate of all aerobic organisms and the terminal acceptor of the electron transport chain (ETC). Analysis of molecular oxygen facilitates the elucidation of critical biochemical pathways; including cell survival and death, mitochondrial function, toxicological impact of compounds and metabolic alterations caused by various stimuli or disease states.
MitoXpress®-Intra is an oxygen-sensitive probe developed for the analysis of intracellular O2 using plate-based time-resolved fluorometry. Measurement is based on the ability of O2 to quench the emission of a probe which is taken up by endocytosis. The probe was tested in HepG2 cells treated with the ETC inhibitor Antimycin or the uncoupler FCCP and measured by a BMG LABTECH microplate reader.
MitoXpress®-Intra allows the convenient monitoring of intracellular oxygen on a conventional microtiter plate format. The probe is 'self-loading' and provides excellent signal to blank performance. This allows the investigation of a variety of parameters currently beyond the capabilities of existing probe technologies.