Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/487
Title: Experimental diabetes modulates collagen remodelling of joints in rats
Authors: ATAYDE, Sandra A.YOSHINARI, Natalino H.NASCIMENTO, Dafne P.CATANOZI, SergioANDRADE, Priscila C.VELOSA, Ana Paula P.PARRA, Edwin R.PASSARELLI, MarisaNAKANDAKARE, Edna R.CAPELOZZI, Vera L.TEODORO, Walcy R.
Citation: HISTOLOGY AND HISTOPATHOLOGY, v.27, n.11, p.1471-1479, 2012
Abstract: The aim of this study was to evaluate extracellular matrix components in articular cartilage, ligaments and synovia in an experimental model of diabetes. Young Wistar rats were divided into a streptozotocin-induced (STZ; 35 mg/kg) diabetic group (DG; n=15) and a control group (CG; n=15). Weight, blood glucose and plasma anti-carboxymethyllysine were measured 70 days after STZ infusions. Knee joints, patellar ligaments, and lateral and medial collateral ligaments were isolated and stained with hematoxylineosin and Picrosirius. The total collagen content was determined by morphometry. Immunofluorescence was employed to evaluate types I, III, and V collagen in ligaments and synovial tissues and types II and XI collagen in cartilage. Results: Higher blood glucose levels and plasma anti-carboxymethyllysine were observed in DG rats when compared to those in CG rats. The final weight was significantly lower in the DG rats than in the CG rats. Histomorphometric evaluation depicted a small quantity of collagen fibers in ligaments and articular cartilage in DG rats, as well as increased collagen in synovial tissue. There was a decrease in cartilage proteoglycans in DG rats when compared with CG rats. Immunofluorescence staining revealed an increase of collagen III and V in ligaments, collagen XI in cartilage, and collagen I in synovial tissue of DG rats compared with CG rats. Conclusion: The ligaments, cartilage and synovia are highly affected following STZ-induced diabetes in rats, due the remodeling of collagen types in these tissues. This process may promote the degradation of the extracellular matrix, thus compromising joint function. Our data may help to better understand the pathogenesis of joint involvement related to diabetes.
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Artigos e Materiais de Revistas Científicas - FM/MCM
Departamento de Clínica Médica - FM/MCM

Artigos e Materiais de Revistas Científicas - FM/MPT
Departamento de Patologia - FM/MPT

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - LIM/10
LIM/10 - Laboratório de Lípides

Artigos e Materiais de Revistas Científicas - LIM/17
LIM/17 - Laboratório de Investigação em Reumatologia


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