title: Effect of dantrolene on lipid peroxidation, lutathione and glutathione-dependent enzyme activities in experimental otitis media with effusion in guinea pigs.
abstract: The aims of our study were to assess whether the increased oxidative stress in experimental otitis media with effusion (OME) induced by histamine was reflected erythrocytes and middle ear effusion fluid by lipid peroxidation; to survey the alterations in antioxidant enzyme activities in experimental OME; and to determine the effect of dantrolene on this oxidative stress. Erythrocyte and middle ear effusion malondialdehyde (MDA) level, erythrocyte glutathione (GSH) and glutathione peroxidase (GSH-Px), glutathione reductase (GRD) and glutathione-S-transferase (GST) activities were measured in three groups of seven guinea pigs, 3 hours after injection of 0.1 mL of histamine (or saline) into the middle ear in guinea pigs with OME (experimental group), in a dantrolene sodium group and in a control group. Erythrocyte and effusion MDA levels in the dantrolene group were significantly lower than those of the experimental group. Erythrocyte GSH-Px, GST, GRD activities, and GSH levels were significantly higher in the dantrolene group than in the experimental group. Dantrolene sodium decreased the erythrocyte and effusion MDA levels, on the other hand, it increased the GSH and GSH-dependent enzymes. These findings suggest that reactive oxygen species (ROS) play a role in histamine-induced OME. Pre-treatment with dantrolene sodium increases antioxidant enzymes activities and decreases formation of MDA, the indicator of lipid peroxidation, in histamine-induced OME.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Ataturk University, Medical School, Erzurum, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Ucuncu
authors.forename: S
authors.initials: S
authors.lastname: Taysi
authors.forename: B
authors.initials: B
authors.lastname: Aktan
authors.forename: M E
authors.initials: ME
authors.lastname: Buyukokuroglu
authors.forename: M
authors.initials: M
authors.lastname: Elmastas
mesh_terms: D000818:Animals; D003620:Dantrolene / Q000494:pharmacology*; D004195:Disease Models, Animal; D004912:Erythrocytes / Q000187:drug effects* / Q000201:enzymology; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D006168:Guinea Pigs; D006632:Histamine; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D009125:Muscle Relaxants, Central / Q000494:pharmacology*; D010034:Otitis Media with Effusion / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D018384:Oxidative Stress / Q000187:drug effects
chemical_list: D009125:Muscle Relaxants, Central; D008315:Malondialdehyde; D006632:Histamine; D005979:Glutathione Peroxidase; D005980:Glutathione Reductase; D005982:Glutathione Transferase; D003620:Dantrolene; D005978:Glutathione