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1.武汉科技大学医学部湖北省妇幼保健院研究生培养基地妇科,湖北武汉
2.华中科技大学附属湖北省妇幼保健院妇科,湖北武汉
3.焦作市妇幼保健院妇产科,河南焦作
4.武汉市普仁医院妇产科,湖北武汉
黄燕明,E-mail: 389680285@qq.com
收稿:2025-07-02,
修回:2025-09-10,
录用:2025-10-23,
纸质出版:2025-11-15
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谢婷,黄燕明,牛嘉颖,等.人羊膜间充质干细胞通过TGF-β1/Smad通路抑制EMT与纤维化修复子宫内膜损伤[J].陆军军医大学学报,2025,47(21):2688-2697.DOI:10.16016/j.2097-0927.202507012.
XIE T,HUANG Y M,NIU J Y,et al.hAMSCs repair endometrial injury through suppressing endometrial EMT and fibrosis via TGF-β1/Smad signaling pathway[J].J Army Med Univ,2025,47(21):2688-2697.DOI:10.16016/j.2097-0927.202507012.
谢婷,黄燕明,牛嘉颖,等.人羊膜间充质干细胞通过TGF-β1/Smad通路抑制EMT与纤维化修复子宫内膜损伤[J].陆军军医大学学报,2025,47(21):2688-2697.DOI:10.16016/j.2097-0927.202507012. DOI:
XIE T,HUANG Y M,NIU J Y,et al.hAMSCs repair endometrial injury through suppressing endometrial EMT and fibrosis via TGF-β1/Smad signaling pathway[J].J Army Med Univ,2025,47(21):2688-2697.DOI:10.16016/j.2097-0927.202507012. DOI:
目的
2
探究人羊膜间充质干细胞(human amniotic mesenchymal stem cells, hAMSCs)对子宫内膜损伤的修复作用及机制。
方法
2
两酶消化法分离hAMSCs,取P3代细胞通过流式细胞术检测表面分子并鉴定其三系分化能力。将18只8~9周龄体质量250~280 g的未生育雌性SD大鼠通过随机数字表法分为3组(
n
=6):正常组(control组)、模型组(IUA组)、hAMSCs组。采用机械及脂多糖感染法建立SD大鼠宫腔粘连(intrauterine adhesions, IUA)模型。造模2周后hAMSCs组双侧宫角移植0.2 mL hAMSCs(1.0×10
6
/μL),IUA组双侧宫角注射等量PBS。移植2周后处死大鼠,采用HE染色观察子宫内膜厚度和腺体数量;Masson染色观察子宫内膜纤维化面积;RT-qPCR方法检测子宫内膜组织中TGF-β1、Smad3、Smad7以及上皮间质转化(epithelial-mesenchymal transition, EMT)标志性因子E-cadherin、Vimentin、纤维化因子α-SMA、子宫内膜雌激素受体(estrogen receptor,ER)、孕激素受体(progesterone receptor,PR)等的mRNA表达水平;Western blot方法检测子宫内膜组织中上述因子的蛋白表达水平。
结果
2
所获细胞经细胞表面分子及分化能力的鉴定符合hAMSCs特征。与control组相比,IUA组子宫内膜厚度降低,腺体数量减少,纤维化面积增加;与IUA组相比,hAMSCs组子宫内膜厚度及腺体数量增加,纤维化面积减少。IUA组子宫内膜中纤维化相关因子TGF-β1、Smad3、Vimentin、α-SMA 的mRNA及蛋白表达水平明显升高(
P
<
0.01);纤维化抑制分子Smad7、EMT标志物E-cadherin以及子宫内膜ER、PR的mRNA及蛋白表达水平明显下调(
P
<
0.01)。与IUA组相比,hAMSCs组上述纤维化相关因子的mRNA表达明显下调(
P
<
0.01),Smad7、E-cadherin、ER及PR的mRNA表达水平则显著上调(
P
<
0.01); hAMSCs组TGF-β1、Smad3、α-SMA的蛋白表达水平明显下降(
P
<
0.05),Smad7、PR的蛋白表达水平明显上升(
P
<
0.05)。
结论
2
hAMSCs宫腔内移植可促进子宫内膜损伤修复,并可能通过TGF-β1/Smad7信号通路抑制子宫内膜EMT和纤维化。
Objective
2
To explore the repair effect and mechanism of human amniotic mesenchymal stem cells (hAMSCs) on endometrial injury.
Methods
2
hAMSCs were isolated using a two-enzyme digestion and then cultured. The third-passage (P3) cells were harvested to detect the surface markers by flow cytometry and to identify their trilineage differentiation potentials. Eighteen nulliparous female SD rats (8~9 weeks old
weighing 250~280 g) were randomly divided into 3 groups (
n
=6): normal control group
model group
and hAMSCs group. A rat model of intrauterine adhesions (IUA) was established in SD rats by using curettage combined with lipopolysaccharide (LPS) infection. In 2 weeks after modeling
the hAMSCs group received a bilateral uterine horn transplantation of 0.2 mL hAMSCs (1.0×10⁶ cells/mL)
while the model group received a same volume of PBS into both uterine horns. All rats were sacrificed in 2 weeks after transplantation. HE and Masson staining was used to observe endometrial thickness and gland number as well as endometrial fibrosis area. RT-qPCR and Western blotting were performed to detect the mRNA and protein levels of TGF-β1
Smad3
Smad7
epithelial-mesenchymal transition (EMT) markers (E-cadherin
Vimentin)
fibrosis factor α-SMA
and endometrial estrogen receptor (ER) and progesterone receptor (PR) in endometrial tissues.
Results
2
The obtained cells were identified as hAMSCs due to the characteristics of surface markers and differentiation potentials. Compared with the normal control group
the model group showed decreased endometrial thickness
reduced gland number
increased fibrosis area
and enhanced mRNA and protein levels of fibrosis-related factors TGF-β1
Smad3
Vimentin
and α-SMA (
P
<
0.01)
while down-regulation of fibrosis-i
nhibiting molecule Smad7
the EMT marker E-cadherin
and endometrial receptors ER and PR at both mRNA and protein levels (
P
<
0.01). hAMSCs transplantation increased endometrial thickness and gland number
decreased fibrosis area
and down-regulated mRNA expression of the aforementioned fibrosis-related factors (
P
<
0.01)
and up-regulated the mRNA expression levels of Smad7
E-cadherin
ER
and PR (
P
<
0.01). The hAMSCs group also exhibited obviously down-regulated protein levels of TGF-β1
Smad3
and α-SMA
(P
<
0.05)
while enhanced protein levels of Smad7 and PR (
P
<
0.05).
Conclusion
2
Intrauterine transplantation of hAMSCs can promote the repair of endometrial injury
and inhibits endometrial EMT and fibrosis through the TGF-β1/Smad7 signaling pathway.
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