title: Fullerene derivatives protect against oxidative stress in RAW 264.7 cells and ischemia-reperfused lungs.
abstract: Fullerene derivatives have often been used as effective scavengers for reactive oxygen species (ROS). This study was designed to test whether polyhydroxylated fullerene derivatives [C(60)(OH)(7+/-2)] protect against oxidative stress in cultured RAW 264.7 cells and ischemia-reperfused (IR) lungs. In RAW 264.7 cells, sodium nitroprusside (SNP, 1 mM) and H(2)O(2) (400 microM) caused a marked (90%) decrease in cell viability, and this decrease was dose dependently reversed by pretreatment with C(60)(OH)(7+/-2) (10-50 microM). The increase in ROS production induced by SNP and H(2)O(2) was significantly suppressed by C(60)(OH)(7+/-2). Also, the decrease in mitochondrial membrane potential induced by SNP and H(2)O(2) was significantly reversed by C(60)(OH)(7+/-2). However, high concentration of C(60)(OH)(7+/-2) (1 and 1.5 mM) lead to cell death (apoptosis or necrosis). In the isolated rat lung, the increases in pulmonary artery pressure and capillary filtration pressure induced by SNP during IR were reversed significantly by C(60)(OH)(7+/-2) (10 mg/kg). These results indicate that polyhydroxylated fullerene derivatives C(60)(OH)(7+/-2) at low concentrations protect against oxidative stress in RAW 264.7 cells and IR lungs.
authors.affiliation: Dept. of physiology, College of Medicine, National Taiwan Univ., No. 1, Sec. 1, Jen-Ai Rd., Taipei 100, Taiwan.
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: Chen
authors.forename: Kuo Chu
authors.initials: KC
authors.lastname: Hwang
authors.forename: Cheng-Chieh
authors.initials: CC
authors.lastname: Yen
authors.forename: Yih-Loong
authors.initials: YL
authors.lastname: Lai
mesh_terms: D000818:Animals; D000975:Antioxidants; D002199:Capillary Permeability / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D037741:Fullerenes / Q000494:pharmacology*; D006861:Hydrogen Peroxide / Q000494:pharmacology; D066298:In Vitro Techniques; D008171:Lung Diseases / Q000517:prevention & control*; D008264:Macrophages / Q000187:drug effects*; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D051379:Mice; D020030:Nitric Oxide Donors / Q000494:pharmacology; D009599:Nitroprusside / Q000494:pharmacology; D016877:Oxidants / Q000494:pharmacology; D018384:Oxidative Stress / Q000187:drug effects*; D011652:Pulmonary Circulation / Q000187:drug effects; D011669:Pulmonary Wedge Pressure / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000378:metabolism; D015427:Reperfusion Injury / Q000517:prevention & control*
chemical_list: D000975:Antioxidants; D037741:Fullerenes; D020030:Nitric Oxide Donors; D016877:Oxidants; D017382:Reactive Oxygen Species; D009599:Nitroprusside; D006861:Hydrogen Peroxide