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Physicochemical and structural analysis of three regions of the deep digital flexor tendon of pigs
Feitosa, Vera Lúcia Corrêa; Esquisatto, Marcelo Augusto Marretto; Joazeiro, Paulo Pinto; Gomes, Laurecir; Felisbino, Sérgio Luis; Pimentel, Edson Rosa.
Afiliação
  • Feitosa, Vera Lúcia Corrêa; Federal University of Sergipe. Department of Morphology. Aracaju. BR
  • Esquisatto, Marcelo Augusto Marretto; University of Araras. Department of Histology. Araras. BR
  • Joazeiro, Paulo Pinto; State University of Campinas. Department of Histology en Embriology. Campinas. BR
  • Gomes, Laurecir; State University of Campinas. Department of Cell Biology. Campinas. BR
  • Felisbino, Sérgio Luis; Paulista State University. Institute of Biosciences. Department of Morphology. Botucatu. BR
  • Pimentel, Edson Rosa; State University of Campinas. Department of Cell Biology. Campinas. BR
Braz. j. morphol. sci ; 22(2): 113-119, Apr.-Jun. 2005. ilus, graf
Article em En | LILACS | ID: lil-418992
Biblioteca responsável: BR734.1
ABSTRACT
Few studies have discussed the relationship between the molecular organization and the physicochemical and biomechanical properties of pig tendons. In this work, we examined the extracellular matrix of the deep digital flexor tendon of pigs, which was subjected to tensional (proximal region) and compressive (distal and terminal regions) forces. The three regions of the tendon were used for swelling tests and their glycosaminoglycan content was determined. Longitudinal sections of the tendon were stained and observed using polarized light microscopy. The distal and terminal regions were swole more in water than the proximal region. After staining with toluidine blue the metachromasy was more intense in the distal and terminal regions, indicating an accumulation of proteoglycans in these regions. Analysis of the glycosaminoglycans by agarose gel electrophoresis showed that dermatan sulfate was present in all regions, whereas chondroitin sulfate occurred only in the regions of compression. The shape of the fibroblasts changed along the tendon rounded cells occurred in regions under compression, while in the region under tension, elongated cells predominated. The organization and distribution of the collagen bundles were different for each region. Birefringence analysis revealed a more regular crimp pattern in the region under tension than in the regions under compressive forces. The elastic fibers also showed a different distribution in each region. These results indicate that the regional differences in the structure and composition of the deep digital flexor tendon of pigs are related to the biomechanical properties of the tendon.
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Coleções: 01-internacional Base de dados: LILACS Assunto principal: Proteoglicanas / Tendões / Colágeno / Fibras Musculares Esqueléticas Limite: Animals Idioma: En Revista: Braz. j. morphol. sci Assunto da revista: ANATOMIA Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Buscar no Google
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Coleções: 01-internacional Base de dados: LILACS Assunto principal: Proteoglicanas / Tendões / Colágeno / Fibras Musculares Esqueléticas Limite: Animals Idioma: En Revista: Braz. j. morphol. sci Assunto da revista: ANATOMIA Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil