Xi J, Pan Y, Jin C, Liu J, Cheng J, Xu B. Evaluation of different rat models with intrauterine adhesions and improved technique for its establishment.
Exp Anim 2023;
72:274-284. [PMID:
36642541 DOI:
10.1538/expanim.22-0153]
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Abstract
Uterine adhesion (IUA), a leading cause of uterine infertility, is characterized by endometrial fibrosis. Implementing an appropriate animal model is essential for the research on the mechanisms of IUA. In the present study, we establish and evaluate different intrauterine adhesion modeling procedures in rats to provide a reference for researchers. Rat IUA models were established by mechanical injury, 95% ethanol injection, and dual (mechanical and infectious) injury. After two estrus cycles, the female rats were mated with sexually mature male rats and uterine tissues were obtained on the 5th day of pregnancy. HE staining and immunohistochemical detection of cytokeratin 19 and vimentin were performed to assess the morphology of the endometrium. The Masson staining and the expression of transforming growth factor -β1 and collagen Ι were used to assess the endometrium fibrosis. The expression of integrin avβ3, LIF, and HOXA10 in rat endometrium was used to evaluate the endometrial receptivity. In addition, the efficiency of embryo implantation was examined in the uterus on the 8th day of pregnancy. In conclusion, our study found that mechanical injury caused by the curette can be completely repaired after two estrus cycles. However, dual injury (mechanical injury with infection) and 95% ethanol injection can be used to establish the IUA rat model, and the dual damage is closer to the clinic-pathological characteristics of IUA.
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