Injectable collagen hydrogel combines human umbilical cord mesenchymal stem cells to promote endometrial regeneration in rats with thin endometrium

Jiawei Wang, Weili Qin, Yanping Zhong, Hao Hu, Junxu Yang, Hanji Huang, Nanchang Huang, Shuhan Liu, Jiaxu Li, Li Zheng, Aiping Qin, Zhenhui Lu
In: International Journal of Biological Macromolecules · 2023 · vol. 254(Pt 1) , pp. 127591 · doi:10.1016/j.ijbiomac.2023.127591 · PMID:37884246 · W4387910979
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This study investigated combining human umbilical cord mesenchymal stem cells with an injectable collagen hydrogel to promote endometrial regeneration in rats with a thin endometrium.

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Abstract

The regeneration of thin endometrium still remains as a great challenge in the field of reproductive medicine. Stem cells-based therapy has been considered as a promising strategy for the restoration of thin endometrium. However, the low transplantation and retention rate of stem cells and loss of stemness due to in vitro expansion limits the therapeutic efficacy. In our study, we combined collagen hydrogel and human umbilical cord mesenchymal stem cells (uMSCs) for improving the regeneration of thin endometrium, by using the potent pluripotency and low immunogenicity of uMSCs and collagen hydrogel that promotes the anchorage and proliferation of stem cells. Results showed that collagen hydrogel has favorable biocompatibility and the capacity to enhance the cell viability and expression of stemness-associated genes (including organic cation/carnitine transporter4 (Oct-4), Nanog homeobox (Nanog) and SRY-box transcription factor 2 (SOX2)) of uMSCs. The combination of collagen hydrogel and uMSCs prolonged the retention time of the constructs in the uterine cavity and improved endometrial thickness compared with uMSCs alone, leading to increase the fertility of the rats with thin endometrium. These highlighted therapeutic prospects of collagen hydrogel combined with uMSCs for the minimally invasive therapy of thin endometrium in the clinic.

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