Establishment and evaluation of four models of intrauterine adhesion and its effects on endometrial receptivity in New Zealand white rabbits
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1.Guangzhou University of Chinese Medicine, Guangzhou 510000, China. 2. General Hospital of the PLA Southern Theater Command, Guangzhou 510000

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R-33

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    Abstract:

    Objective To explore the effects of four different modeling method on endometrial receptivity, and establish a stable and effective experimental animal model of intrauterine adhesion ( IUA) with clinicopathological characteristics. Methods New Zealand white rabbits were randomly divided into 5 groups, according to different method of damage: chemical, infection, mechanical, thermal, and sham-operated ( control) groups. Rabbit bilateral uterine tissue was collected 4, 7, 14 and 28 d after treatment, and pathological changes were examined on both sides of the endometrium, using hematoxylin-eosin and Masson staining analysis. The thickness and number of endometrial glands and fibrosis area ratios were determined to evaluate the severity of adhesions. Pregnancy rates and the number of embryo implantations were used to examine reproductive function. Results Histopathological observations showed that both endometrial thickness and the number of glands decreased in the chemical-injured and heat-injured groups compared with the control group 7 and 14 d after treatment (P<0. 05), whereas the endometrial fibrosis area ratio was increased (P<0. 05). There were no significant differences between the mechanical damage and control groups. At 14 d after modeling, the pregnancy rate and number of uterine embryo implantations decreased in the chemical compared with the control group (P<0. 05), and the number of rabbit embryo implantations was significantly reduced (P<0. 001) in the heat- injured compared with control group. After 28 d of modeling, the chemical, infection and mechanical groups had basically recovered, but not the heat damage group. Conclusions In general, the histopathological changes observed in rabbit uteri after chemical injury modeling were more similar to the characteristics of moderate and severe IUA in humans, indicating this approach may be used as an effective model to investigate moderate and severe human IUA, and provide a basis for future in-depth study of the pathogenesis and treatment of IUA.

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History
  • Received:October 28,2020
  • Revised:
  • Adopted:
  • Online: October 25,2021
  • Published: