Effect of radiosynovectomy with holmium-166 ferric hydroxide macroaggregate on adult equine cartilage.
2004 (English)In: Journal of Rheumatology, ISSN 0315-162X, E-ISSN 1499-2752, Vol. 31, no 2, 321-328 p., 14760804Article in journal (Refereed) Published
OBJECTIVE: To analyze the effect of radiosynovectomy with holmium-166 ferric hydroxide macroaggregate (166Ho-FHMA) on articular cartilage in 6 adult horses.
METHODS: Arthritic changes and mechanical properties of articular cartilage were evaluated with arthroscopy and postmortem microscopic analyses. Glycosaminoglycan content was measured by safranin-O staining combined with digital densitometry, uronic acid analyses, and dimethylene blue binding assay. 35S-sulfate labeling and autoradiography were used to localize proteoglycan synthesis and to characterize proteoglycan structures using SDS-agarose gel electrophoresis. Northern hybridizations were performed to measure the mRNA levels for aggrecan and pro-a1(II) collagen in cartilage samples.
RESULTS: Histological signs of degeneration were present in the articular cartilage of both control and radiosynovectomized equine joints. Radiosynovectomy did not aggravate degenerative changes or significantly alter the matrix glycosaminoglycan content. A slightly decreased size of proteoglycan monomers was observed 2 months after 166Ho-FHMA radiosynovectomy. Tissue analysis of extracted proteoglycans revealed lower 35S incorporation after radiosynovectomy, but corresponding changes could not be observed in aggrecan mRNA levels. Transient downregulation of pro-a1(II) collagen mRNA transcription was observed 5 days after 166Ho-FHMA radiosynovectomy.
CONCLUSION: 166Ho-FHMA treatment did not markedly affect the composition or morphology of adult articular cartilage showing mild degeneration. However, minor degradation of proteoglycan monomers and transient downregulation of pro-a1(II) collagen mRNA were observed.
Place, publisher, year, edition, pages
2004. Vol. 31, no 2, 321-328 p., 14760804
Articular cartilage, radiosynovectomy, proteoglycans, collagen
Rheumatology and Autoimmunity Cell and Molecular Biology Radiology, Nuclear Medicine and Medical Imaging
Research subject Biochemistry; Molecular Biology; Medicine, rheumatology
IdentifiersURN: urn:nbn:se:umu:diva-106850PubMedID: 14760804OAI: oai:DiVA.org:umu-106850DiVA: diva2:845177