Flavonoids protect U-937 macrophages against tert-butylhydroperoxide induced oxidative injury.
The study was carried out to determine the relative efficacies of polyphenolic flavonoids, quercetin, catechin and epicatechin against tert-BOOH induced oxidative stress in human macrophage, U-937 cell line. Exposure of the cells to tert-BOOH oxidative stress resulted in a significant increase in cytotoxicity and reactive oxygen species (ROS) generation. Further, a significant decrease in mitochondrial membrane potential and increase in lipid peroxidation and DNA damage was observed in cells exposed to tert-BOOH. Pretreatment of cells with quercetin, catechin and epicatechin significantly inhibited tert-BOOH induced cytotoxicity by inhibiting ROS generation. The flavonoids inhibited DNA damage induced by tert-BOOH and preserved the mitochondrial transmembrane potential significantly. Epicatechin and catechin were found to be more efficient than quercetin in inhibiting tert-BOOH induced cellular damage.
Kanupriya
Defence Institute of Physiology and Allied Sciences, Lucknow Road, Timarpur, Delhi 110054, India.
Dipti
P
P
Sharma
S K
SK
Sairam
M
M
Ilavazhagan
G
G
Sawhney
R C
RC
Banerjee
P K
PK
D000975:Antioxidants / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000494:pharmacology; D001713:Biphenyl Compounds; D002392:Catechin / Q000633:toxicity; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D020552:Comet Assay; D004249:DNA Damage / Q000187:drug effects; D004591:Electrophoresis, Polyacrylamide Gel; D005419:Flavonoids / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000494:pharmacology; D006801:Humans; D015227:Lipid Peroxidation / Q000187:drug effects; D008264:Macrophages / Q000187:drug effects*; D008564:Membrane Potentials / Q000187:drug effects; D008930:Mitochondria, Liver / Q000187:drug effects / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D010851:Picrates / Q000737:chemistry; D011794:Quercetin / Q000633:toxicity; D020122:tert-Butylhydroperoxide / Q000633:toxicity*
D000975:Antioxidants; D001713:Biphenyl Compounds; D005419:Flavonoids; D016166:Free Radical Scavengers; D010851:Picrates; D002392:Catechin; D020122:tert-Butylhydroperoxide; D011794:Quercetin; C004931:1,1-diphenyl-2-picrylhydrazyl; D001205:Ascorbic Acid