Effects of high molecular weight hyaluronic acid on induced arthritis of the temporomandibular joint in rats

Autor(es)

Lemos, George Azevedo ^[1] ; Rissi, Renato ^[1] ; Pimentel, Edson Rosa ^[1] ; Palomari, Evanisi Teresa ^[1]

Afiliação do(s) autor(es)

^[1] State Univ Campinas UNICAMP, Inst Biol, Dept Struct & Funct Biol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACTA HISTOCHEMICA; v. 117, n. 6, p. 566-575, 2015.
• Citações Web of Science: 3

Resumo

High molecular weight hyaluronic acid (HMWHA) has been used to treat temporomandibular joint (TMJ) disorders, but controversial results have been described. This study aimed to characterize the morphological and biochemical actions of HMWHA on induced arthritis of the TMJ. Twenty-four male Wistar rats were used, and arthritis of the TMJ was induced through an intra-articular injection of Complete Freund's Adjuvant (CFA) (50 mu l). One week after arthritis induction, the animals were treated with HMWHA (once per week for three weeks). Histological analyses were performed using sections stained with hematoxylin-eosin, toluidine blue and Picrosirius. Were also performed histomorphometric analysis and birefringence of collagenous fibers (polarization microscopy). Biochemical analyses of TMJ tissues were carried out through measurements of sulfated glycosaminoglycans and zymography for evaluation of metalloproteinase-2 and -9 (MMP-2 and -9). Data were analyzed using paired t-test and unpaired t-test, with a 5% significance level. HMWHA reduced histologic changes and thickness of the articular disc, led to a greater arrangement of collagenous fibers, lower concentration of sulfated glycosaminoglycans and lower activity in all isoforms of MMP-2 and-gin TMJs with induced arthritis. These findings suggest that HMWHA may exert a protective effect on the TMJ. (C) 2015 Elsevier GmbH. All rights reserved. (AU)

• Processo FAPESP: 13/21984-9 - Efeito da terapia com o laser de baixa potência e hialuronato de sódio de alto peso molecular na osteoartrite da ATM de ratos induzida por CFA
• Beneficiário: Evanisi Teresa Palomari
• Modalidade de apoio: Auxílio à Pesquisa - Regular