Multiple protective mechanisms of alpha-lipoic acid

February 19, 2015 Science Blog By

A new study examined the protective effect of α-LA against H2O2-induced oxidative stress and apoptosis in human lymphoid cells. Human peripheral blood lymphocytes were preincubated with α-LA and then exposed to H2O2. After that, the viability of the cells, rate of apoptosis, oxidative stress biomarkers such as reactive oxygen species (ROS) and level of lipid peroxidation (LPO), and also tumor necrosis factor-α (TNF-α) were studied. Pretreatment of lymphocytes with α-LA, dramatically enhanced viability of the cells and decreased apoptosis. Investigation of caspases gives a clear picture of the mechanism by which α-LA decreases ROS and causes a reduction in apoptosis through caspase-9-dependent mitochondrial pathway. Furthermore, α-LA dose dependently decreased oxidative stress by a reduction in level of LPO, and the dose of 1000 µM indicates a significant decrease (p < 0.01) in TNF-α level. Collectively, the present data show that α-LA is an ideal compound which has profound protective effects on oxidation, inflammation, and apoptosis. As a result, α-LA may indicate a new way toward the development of antioxidant therapy.

Mol Cell Biochem. 2015 Feb 12.
Multiple protective mechanisms of alpha-lipoic acid in oxidation, apoptosis and inflammation against hydrogen peroxide induced toxicity in human lymphocytes.
Rahimifard M1, Navaei-Nigjeh M, Baeeri M, Maqbool F, Abdollahi M.

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