Peer-reviewed veterinary case report
Cytokine differences in dogs with immune arthritis vs osteoarthritis
By Hegemann, N et al.·Published in Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2005·Institute of Immunology and Molecular Biology, Germany·View original on PubMed →
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Original publication title: Cytokine profile in canine immune-mediated polyarthritis and osteoarthritis.
- Species:
- dog
Plain-English summary
A group of dogs with joint pain were studied to understand the differences between immune-mediated polyarthritis (a condition where the immune system attacks the joints) and osteoarthritis (arthritis caused by wear and tear). The researchers found that both conditions showed similar levels of certain inflammatory substances in their joint fluid, but dogs with immune-mediated polyarthritis had higher levels of a specific inflammatory marker called TNF-alpha. This suggests that while both conditions are inflammatory, the immune-mediated type may be more aggressive. Understanding these differences could help in developing better treatments for dogs suffering from these painful joint issues.
People also search for: dog joint pain treatment · immune-mediated polyarthritis in dogs · osteoarthritis in dogs symptoms
Abstract
The purpose of this study was to determine the cytokine profile in 21 dogs with canine immune-mediated polyarthritis (IMA) and 15 dogs with osteoarthritis (OA) caused by cranial cruciate ligament rupture (CCLR). The mRNA expression of interleukin (IL)-1alpha, IL-1beta, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12, IL-18, interferon (IFN)-gamma, transforming growth factor (TGF)-beta, and tumour necrosis factor (TNF)-alpha were analysed in synovial fluid by semi-quantitative RT-PCR, while TNF-alpha protein was determined by L929 cytotoxicity assay. The frequency of lymphocytes was analysed using FACScan. Both disorders reveal a similar cytokine expression pattern, except for significant lower IL-1beta expression in OA. Th1 cytokines IL-2 and IFN-gamma were detected, while IL-4 was nearly absent in IMA and OA. Furthermore, the bioassay demonstrates a significantly higher production of TNF-alpha in synovial fluid of dogs with IMA, compared to dogs with OA (p < 0.05). The frequency of CD4+, CD8+ and MHC class II+ cells was relatively higher in synovial fluids compared to peripheral blood in IMA. These findings reveal that the difference between the cytokine pattern of canine IMA and OA seems to be rather quantitative than qualitative. Both joint disorders show predominance of pro-inflammatory cytokines and absence of TH2 cytokine expression, indicating the potential of IL-4 for a gene therapeutic approach.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/16594200/