Protective effects of sesamin and sesamolin on murine BV-2 microglia cell line under hypoxia.
Sesamin and sesamolin were tested for their ability to protect BV-2 microglia from hypoxia-induced cell death. These antioxidants dose-dependently reduced hypoxia-induced lactate dehydrogenase (LDH) release and dichlorofluorescein (DCF)-sensitive reactive oxygen species (ROS) production. Their effects on signaling pathway mitogen-activated protein kinases (MAPKs) and caspase-3 in hypoxia-induced cell death were further examined. Extracellular signal-regulated protein kinases (ERK1/2), c-jun NH(2)-terminal kinase (JNK), and p38 MAPKs were activated during hypoxia. The sesamin or sesamolin reduced caspase-3 and MAPK activation correlated well with diminished LDH release in BV-2 cells under hypoxia. Furthermore, they preserved superoxide dismutase (SOD) and catalase activities in BV-2 cells under hypoxia. Taken together, these results indicate that the mechanism of sesame antioxidants involves inhibition of MAPK pathways and apoptosis through scavenging of ROS in hypoxia-stressed BV-2 cells.
Jen-Teh Junior College of Medical and Nursing Management, Miaoli, Taiwan, ROC.
Rolis Chien-Wei
RC
Hou
Chia-Chuan
CC
Wu
Chia-Hung
CH
Yang
Kee-Ching G
KC
Jeng
D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D015153:Blotting, Western / Q000379:methods; D053148:Caspase 3; D020169:Caspases / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D015687:Cell Hypoxia / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D004149:Dioxoles / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D017705:Lignans / Q000494:pharmacology*; D051379:Mice; D017628:Microglia / Q000187:drug effects*; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D013778:Tetrazolium Salts; D013844:Thiazoles
D000975:Antioxidants; D004149:Dioxoles; D017705:Lignans; D017382:Reactive Oxygen Species; D013778:Tetrazolium Salts; D013844:Thiazoles; C054124:sesamolin; D007770:L-Lactate Dehydrogenase; D002374:Catalase; D020928:Mitogen-Activated Protein Kinases; C505409:Casp3 protein, mouse; D053148:Caspase 3; D020169:Caspases; C022616:thiazolyl blue; C054125:sesamin