Inflammatory Process Induced by Carrageenan in Adjacent Tissue Triggers the Acute Inflammation in Deep Digital Flexor Tendon of Rats
Version of Record online: 17 JUN 2013
Copyright © 2013 Wiley Periodicals, Inc.
The Anatomical Record
Volume 296, Issue 8, pages 1187–1195, August 2013
How to Cite
Vieira, C. P., De Aro, A. A., Da Ré Guerra, F., De Oliveira, L. P., De Almeida, M. D. S. and Rosa Pimentel, E. (2013), Inflammatory Process Induced by Carrageenan in Adjacent Tissue Triggers the Acute Inflammation in Deep Digital Flexor Tendon of Rats. Anat Rec, 296: 1187–1195. doi: 10.1002/ar.22729
- Issue online: 13 JUL 2013
- Version of Record online: 17 JUN 2013
- Manuscript Accepted: 14 MAY 2013
- Manuscript Revised: 5 APR 2013
- acute inflammation;
- extracellular matrix;
Tendinopathy is a pathology found mainly in the rotator cuff, patellar, Achilles and flexor tendons. Tendinopathy is a significant impediment to performance in athletes and in workers in the labor market. Some studies have indicated that inflammation in adjacent tissues may affect the rotator cuff and Achilles tendon. In this study alterations were verified in the extracellular matrix (ECM) of the deep digital flexor tendon after two periods (12 and 24 hr) of induction inflammation in rat paw. Wistar rats were divided into three groups: those that received injection of 1% carrageenan; those that received 0.9% NaCl; and those that received no application. The tendon was divided into distal (d), proximal (p), and intermediate (i) regions. Biochemical analyses were performed and included non-collagenous proteins (NCP), glycosaminoglycans (GAGs), hydroxyproline (HoPro) and metalloproteinases 2 and 9. Tissue sections were stained with toluidine blue, hematoxylin-eosin, and Ponceau SS and observed under polarization microscopy. Remarkable results were detected that included the presence of MMP-9, degradation of NCP and GAG and the presence of cellular infiltrate closer to digits in d region. The different concentrations of HoPro, as well as alterations in the organization of the collagen fibers showed the collagenous matrix undergoing some alterations. The results indicated that the induced inflammation in rat paw exhibited characteristics similar to the typical acute inflammatory process observed in tendons. Anat Rec, 2013. © 2013 Wiley Periodicals, Inc.