title: Effects of intra-articular administration of methylprednisolone acetate on normal equine articular cartilage.
abstract: The effects of the corticosteroid 6-alpha-methylprednisolone acetate on normal equine articular cartilage were evaluated, using the middle carpal joint in 4 clinically normal young horses. One middle carpal joint of each horse was injected 3 times with 100 mg of 6-alpha-methylprednisolone acetate, at 14-day intervals. The opposite middle carpal joint (control) was injected with 2.5 ml of lactated Ringer solution at the same intervals. Effects were studied until 8 weeks after the first injection. Evaluation included clinical and radiographic examination, and gross, microscopic, and biochemical evaluation of joint tissues. Horses remained clinically normal during the study, and significant radiographic changes were not observed. Safranin-0 matrix staining intensity and uronic acid content were significantly (P less than 0.05) lower and hydroxyproline content was significantly (P less than 0.05) higher in articular cartilage of corticosteroid-injected joints vs control joints.
authors.affiliation: Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523.
authors.forename: G W
authors.initials: GW
authors.lastname: Trotter
authors.forename: C W
authors.initials: CW
authors.lastname: McIlwraith
authors.forename: J V
authors.initials: JV
authors.lastname: Yovich
authors.forename: R W
authors.initials: RW
authors.lastname: Norrdin
authors.forename: R H
authors.initials: RH
authors.lastname: Wrigley
authors.forename: C H
authors.initials: CH
authors.lastname: Lamar
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000494:pharmacology*; D002358:Cartilage, Articular / Q000187:drug effects*; D005069:Evaluation Studies as Topic; D006736:Horses; D007270:Injections, Intra-Articular / Q000662:veterinary; D008775:Methylprednisolone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D000077555:Methylprednisolone Acetate
chemical_list: D000893:Anti-Inflammatory Agents; D000077555:Methylprednisolone Acetate; D008775:Methylprednisolone