PMID- 8731393 OWN - NLM STAT- MEDLINE DCOM- 19960926 LR - 20220311 IS - 1063-4584 (Print) IS - 1063-4584 (Linking) VI - 4 IP - 1 DP - 1996 Mar TI - Tumor necrosis factor-alpha (TNF-alpha) in canine osteoarthritis: Immunolocalization of TNF-alpha, stromelysin and TNF receptors in canine osteoarthritic cartilage. PG - 23-34 AB - The presence and distribution of tumor necrosis factor-alpha (TNF-alpha), TNF receptors and stromelysin [matrix metalloproteinase 3 (MMP-3)] in articular cartilage were evaluated in an iatrogenically induced model of osteoarthritis (OA). Eleven adult male dogs were assigned randomly to a control group (N = 4) or an OA group (N = 7). Osteoarthritis was created by surgical transection of the cranial cruciate ligament of one stifle joint. Both femoral condyles were sampled 3 months post-surgery at necropsy and immunohistochemically analyzed for the presence of the aforementioned cytokines and receptors. Chondrocytes stained for TNF-alpha and TNF receptors in control articular cartilage, spanning an area encompassing most of the middle and deep zones. Positive matrical and chondrocytic staining for TNF-alpha, TNF receptors, and stromelysin was present in OA articular cartilage. Staining varied in intensity and distribution and was dependent of the severity of the lesion. Smooth muscle cells of arteries and arterioles (periarticular synovial membrane) were stained for only one (p55) of two TNF receptors; this staining was confined to control tissues. Results indicate that the differential expression of TNF-alpha and its receptors may be important in the normal maintenance of articular cartilage. The increased presence of TNF-alpha and its receptors in articular cartilage with mild osteoarthritic changes suggests a role in the development of early OA. Regulating TNF-alpha may be an important component in the treatment of OA. FAU - Kammermann, J R AU - Kammermann JR AD - Department of Anatomy and Histology, College of Veterinary Medicine, Auburn University, Alabama 36849-5518, USA. FAU - Kincaid, S A AU - Kincaid SA FAU - Rumph, P F AU - Rumph PF FAU - Baird, D K AU - Baird DK FAU - Visco, D M AU - Visco DM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Osteoarthritis Cartilage JT - Osteoarthritis and cartilage JID - 9305697 RN - 0 (Receptors, Tumor Necrosis Factor) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 3.4.24.- (Metalloendopeptidases) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - Animals MH - Cartilage, Articular/*metabolism/pathology MH - Disease Models, Animal MH - Dogs MH - Immunohistochemistry MH - Male MH - Matrix Metalloproteinase 3 MH - Metalloendopeptidases/*metabolism MH - Muscle, Smooth, Vascular/metabolism MH - Osteoarthritis/*metabolism/pathology MH - Receptors, Tumor Necrosis Factor/*metabolism MH - Synovial Membrane/metabolism MH - Tumor Necrosis Factor-alpha/*metabolism EDAT- 1996/03/01 00:00 MHDA- 1996/03/01 00:01 CRDT- 1996/03/01 00:00 PHST- 1996/03/01 00:00 [pubmed] PHST- 1996/03/01 00:01 [medline] PHST- 1996/03/01 00:00 [entrez] AID - S1063-4584(96)80004-5 [pii] AID - 10.1016/s1063-4584(96)80004-5 [doi] PST - ppublish SO - Osteoarthritis Cartilage. 1996 Mar;4(1):23-34. doi: 10.1016/s1063-4584(96)80004-5.