Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/200386
Type: Artigo de periódico
Title: Effects Of Acute Inflammation Induced In The Rat Paw On The Deep Digital Flexor Tendon.
Author: Vieira, Cristiano Pedrozo
de Aro, Andrea Aparecida
de Almeida, Marcos dos Santos
de Mello, Gláucia Coelho
Antunes, Edson
Pimentel, Edson Rosa
Abstract: The tendon is commonly affected by inflammation, and in such situations, the tissue undergoes a process of reorganization of the extracellular matrix to improve and regenerate the affected region. Little is known about the mechanisms that trigger inflammation in the tissues surrounding the affected area. The objective of this study was to biochemically and morphologically analyze the deep digital flexor tendon at the peak of acute inflammation in the rat paw. Wistar rats were divided into the following three groups: those that received injection of 1% carrageenan, those that received 0.9% NaCl, and those that received nothing. The deep digital flexor tendon was divided into the distal, proximal, and intermediate regions. For biochemical analysis, the tendons were treated with guanidine hydrochloride and analyzed by sodium dodecyl sulfate-polyacrilamide gel electrophoresis. Proteins, glycosaminoglycans (GAGs), and hydroxyproline were quantified, and metalloproteinases were analyzed. The GAGs were analyzed by agarose gel electrophoresis. Tissue sections were stained with hematoxylin-eosin, toluidine blue, and Ponceau SS. The content of proteins and GAGs was smaller in the group receiving the application of carrageenan. The concentration of hydroxyproline in the two tendon regions that respond to tension forces was higher in the inflammation group. The metalloproteinase-9 was detected in the distal region, and a thicker epitenon with cellular infiltrate was observed in the groups with inflamed paws. Meanwhile, a better organization of collagen bundles was observed in the two tension regions of that same group. Our results show that although the tendon was not directly inflamed, changes in the surrounding structural and biochemical parameters were observed.
Subject: Acute Disease
Animals
Carrageenan
Disease Models, Animal
Edema
Electrophoresis, Agar Gel
Extracellular Matrix Proteins
Hydroxyproline
Inflammation
Injections, Subcutaneous
Male
Matrix Metalloproteinase 2
Rats
Rats, Wistar
Tendinopathy
Tendon Injuries
Tendons
Rights: fechado
Identifier DOI: 10.3109/03008207.2011.620189
Address: http://www.ncbi.nlm.nih.gov/pubmed/22141408
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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