Abstract

Asherman syndrome (AS) is a symptomatic intrauterine adhesion caused by endometrial basal layer fibrosis as a result of either uterine cavity surgery or infection leading to many complications. There is a concern to repair the injured tissues by using bone marrow mesenchymal stem cells (BM-MSCs). We aimed in this study to develop an animal model of AS and evaluate the anti-inflammatory and anti-fibrotic effects of BM-MSCs in this model through histological, immunohistochemical, and morphometric studies. Forty-two adult female adult albino rats were divided into (i) donor group composed of 2 rats used for isolation and propagation of BM-MSCs, and (ii) experimental groups: 40 rats equally divided into 4 groups: GpI (control), GpII (AS model), GpIII (BM-MSCs-treated AS rats), GpIV (untreated AS rats). Histological staining and immunohistochemical (IHC) detection of proliferating cell nuclear antigen (PCNA), vascular endothelial growth factor (VEGF), and nuclear factor-kappa beta (NF-kB) were performed. The results were evaluated by morphometric and statistical analysis. Significant endometrial thinning, fibrosis, and degeneration of the endometrial epithelium with a significant decrease in PCNA and VEGF immunoexpression and a significant increase in NF-kB immunoexpression were detected in GpII and GpIV groups. These changes were substantially reversed in BM-MSCs-treated animals. BM-MSCs treatment resulted in substantial improvement of intrauterine adhesion in the rat model of Asherman syndrome.

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