Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 125-139

Amniotic membrane as an option for treatment of acute Achilles tendon injury in rats

Nicodemo, Mariana de CastroNeves, Lia Renó dasAguiar, Josafá CarvalhoBrito, Flaviane de SouzaFerreira, IsabelleSant'Anna, Luciana BarrosRaniero, Leandro JoséMartins, Rodrigo Álvaro LopesBarja, Paulo RoxoArisawa, Emilia Angela Lo Schiavo

Purpose: To evaluate the effect of human amniotic membrane (hAM) fragment on inflammatory response, proliferation of fibroblast and organization of collagen fibers in injured tendon. Methods: Sixty rats were divided into 3 groups: C - surgical procedures without tendon lesion and with simulation of hAM application; I - surgical procedures, tendon injury and simulation of hAM application; T - surgical procedures, tendon injury and hAM application. These groups were subdivided into four experimental times (3, 7, 14 and 28 days). The samples underwent histological analysis and ATR-FTIR spectroscopy. Results: Histological analysis at 14 days, the T group showed collagen fibers with better alignment. At 28 days, the I group presented the characteristics described for the T group at 14 days, while this group presented aspects of a mature connective tissue. FT-IR analysis showed a clear distinction among the three groups at all experimental times and groups T and I presented more similarities to each other than to group C. Conclusion: Acute injury of tendon treated with human amniotic membrane fragment showed a faster healing process, reduction in inflammatory response, intense proliferation of fibroblasts and organization of collagen fibers.(AU)

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