title: Cytoprotective effects of Morinda officinalis against hydrogen peroxide-induced oxidative stress in Leydig TM3 cells.
abstract: OBJECTIVE
  To investigate the antioxidant effects of Morinda officinalis (Morindae radix, MR) on H(2)O(2)-induced oxidative stress in cultured mouse TM3 Leydig cells.
  
  
  METHODS
  We carried out 2,2-diphenyl-1-picrylhydrazyl free radical scavenging, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, lipid peroxidation, testosterone enzyme immunoassay, superoxide dismutase (SOD), and catalase (CAT) assays in Leydig TM3 cells.
  
  
  RESULTS
  MR showed a 47.8% 2,2-diphenyl-1-picrylhydrazyl radical scavenging effect in TM3 cells with no significant cytotoxicity. Oxidative stress was induced in TM3 cells with 100 micromol H(2)O(2), and treatment of the cells with 250 microg/mL MR showed the most significant protective effect (64%, P < 0.001) in the cell viability assay with a decreased lipid peroxidation level (1.75 nmol/mg protein, P < 0.05), increased testosterone production (43.5 pg/mL), and improvements in SOD activity (7.49 units of SOD/mg protein, P < 0.001) and CAT activity (74.6 units of CAT/mg protein, P < 0.001).
  
  
  CONCLUSIONS
  These findings indicate that MR, as an antioxidant, protects functions of cultured mouse TM3 Leydig cells from H(2)O(2)-induced oxidative stress.
authors.affiliation: Department of Prescriptionology, College of Oriental Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Mun-Seog
authors.initials: MS
authors.lastname: Chang
authors.forename: Won-Nam
authors.initials: WN
authors.lastname: Kim
authors.forename: Woong-Mo
authors.initials: WM
authors.lastname: Yang
authors.forename: Hyu-Young
authors.initials: HY
authors.lastname: Kim
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Oh
authors.forename: Seong-Kyu
authors.initials: SK
authors.lastname: Park
mesh_terms: D000818:Animals; D002374:Catalase / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D006861:Hydrogen Peroxide / Q000009:adverse effects*; D007985:Leydig Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D051379:Mice; D032066:Morinda; D018384:Oxidative Stress / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology*; D012333:RNA, Messenger / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D013739:Testosterone / Q000378:metabolism
chemical_list: D010936:Plant Extracts; D012333:RNA, Messenger; D013739:Testosterone; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase