CC BY-NC-ND 4.0 · Journal of Coloproctology 2016; 36(01): 040-044
DOI: 10.1016/j.jcol.2015.12.004
Original Article

Using amniotic membrane for anal sphincter repair in animal model

Uso de membrana amniótica para reparo de esfíncter anal em modelo animal
Ahmad Izadpanah
a   Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
b   Department of General Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
,
Mohammad Rezazadehkermani
b   Department of General Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
,
Mohammadali Ghaderi
c   Emergency Management Center, Shiraz University of Medical Sciences, Shiraz, Iran
,
Salar Rahimikazerooni
a   Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
,
Alireza Safarpour
a   Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
,
Kaynoosh Homayouni
d   Department of Physical Medicine and Rehabilitation, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
,
Maral Mokhtari
e   Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
,
Alimohammad Bananzadeh
a   Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
b   Department of General Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
› Author Affiliations

Abstract

Purpose Sphincter repair is the primary management for fecal incontinence especially in traumatic causes. Regardless of progression in the method and material of sphincter repair, the results are still disappointing. This study evaluates the efficacy of using amniotic membrane during sphincteroplasty regarding its effects in healing of various tissues.

Methods Rabbits undergone sphincterotomy and after three weeks end to end sphincteroplasty was done. Animals divided to three groups: classic sphincteroplasty, sphincteroplasty with fresh amniotic membrane and sphincteroplasty with decellularized amniotic membrane. Three weeks after sphincteroplasty animals were sacrificed and sphincter complex was sent for histopathologic evaluation. Sphincter muscle diameter and composition of sphincter was evaluated. Before sphincterotomy, before and after sphincteroplasty electromyography of sphincter at the site of repair were recorded.

Results No statistical significant difference was seen between groups even in histopathology or electromyography.

Conclusion Although amniotic showed promising effects in the healing of different tissue in animal and human studies it was not effective in healing of injured sphincter.

Resumo

Objetivo Reparo do esfíncter é o tratamento primário para casos de incontinência fecal, especialmente em causas traumáticas. Independentemente da progressão no método e do material de reparo do esfíncter, os resultados são ainda desapontadores. Esse estudo avalia a eficácia do uso da membrana amniótica durante a esfincteroplastia, com relação aos seus efeitos na cura de diversos tecidos.

Métodos Coelhos foram submetidos a um procedimento de esfincterotomia e, depois de transcorridas três semanas, foi realizada uma esfincteroplastia término-terminal. Os animais foram divididos em três grupos: esfincteroplastia clássica, esfincteroplastia com membrana amniótica fresca, e esfincteroplastia com membrana amniótica descelularizada. Três semanas após a realização da esfincteroplastia, os animais foram sacrificados e o complexo esfinctérico foi encaminhado para avaliação histopatológica. O diâmetro do músculo esfinctérico e a composição do esfíncter foram avaliados. Antes da esfincterotomia, e antes e depois da esfincteroplastia, foi registrada a eletromiografia do esfíncter no local do reparo.

Resultados Não foi observada diferença estatisticamente significativa entre os grupos, mesmo na histopatologia, ou na eletromiografia.

Conclusão Embora a membrana amniótica tenha demonstrado efeitos promissores em termos da cicatrização dos diferentes tecidos em estudos com animais e em humanos, não foi observada eficácia na cura do esfíncter lesionado.



Publication History

Received: 09 November 2015

Accepted: 10 December 2015

Article published online:
17 February 2021

© 2016. Sociedade Brasileira de Coloproctologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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