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Extracellular vesicles from adipose-derived mesenchymal stem cells promote stemness and EMT of corneal epithelial stem cells

ABSTRACT: Corneal diseases are a leading contributor of vision impairment and their treatment remains challenging. It’s known that enhancement of the stemness of corneal epithelial stem cells (CECs) plays a pivotal role in effective treatments. In this study, we evaluated the effects of extracellular vesicles from human adipose-derived mesenchymal stem cells (AdMSC-EVs) on CECs. Firstly, colony formation assays showed that the colony-forming efficiency (CFE) of CECs significantly increased in the presence of AdMSC-EVs. Then we demonstrated that AdMSC-EVs accelerated migration of CECs in a scratch assay, whereas the proliferation of CECs was suppressed by AdMSC-EVs in cell proliferation assay. RNA Sequencing (RNA-Seq) analysis of CECs implied that AdMSC-EVs maintained the stemness, as well as improved epithelial-mesenchymal transition (EMT). Furthermore, having identified the six top microRNAs (miRNAs) of AdMSC-EVs, CEC transfection with those miRNA mimics, indicated that miR-25, miR-191, and miR-335 were the most effective molecules for improving stemness and EMT. Taken together, our findings indicated that AdMSC-EVs can enhance stemness and EMT of CECs, and AdMSC-EV effects are exerted by the contained miRNAs.

ORGANISM(S): Homo sapiens

PROVIDER: GSE255429 | GEO | 2025/04/30

REPOSITORIES: GEO

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Project description:Human corneal endothelial cells (CECs) are not able to proliferate or regenerate within the eye. However, limited in vitro expansion of primary human CECs has been demonstrated by several laboratories, including ours. Due to the nature of these primary cells, various culture conditions supporting the active proliferation of these cells also drives them towards an endothelial-to-mesenchymal transformation (EMT) into fibroblastic-like cells. The occurrence of such a phenomenon has been observed as early as after the first round of passage. However, it should be noted that the degree of such transformation is highly heterogeneous, due likely to donor variability. In the current study, propagation of primary human CECs was carried out using a novel dual media approach, where M4 (F99: HamM-bM-^@M-^Ys F12/M199, 5% FBS, 20 M-NM-<g/ml ascorbic acid, 1% ITS, 1% antibiotic/antimycotic and 10 ng/ml bFGF) was used to promote the proliferation of the CECs, and M5 (Endo: Human Endothelial-SFM, 5% FBS and 1% antibiotic/antimycotic), was used to stabilized these primary CECs when they reached 80% to 90% confluence.Primary cultures exposed to M5 were able to maintain the unique cellular structure of the human corneal endothelial cells and do not undergo EMT. In order to better understand the observed morphological changes at the molecular level following the switch from the proliferative M4 medium to the maintainance M5 medium, high throughput microarray analysis was performed on human CECs isolated from two donors and cultivated to the third passage. Subsequently, the global gene expression profile of the confluent human CECs expanded in M4 for the first (D17p) and second donor (D18p), were compared to the same set of the confluent human CECs maintained in M5 medium (D17m and D18m) for a further seven days. Primary human CECs were expanded using the dual media approach to the third passage. Total RNA obtained from confluent P3 human CECs samples grown in the proliferative M4 medium (D17p and D18p) were compared to the same set of primary cultures that were exposed to M5 for a further 7 days (D17m and D18m).

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Extracellular vesicles from adipose-derived mesenchymal stem cells promote stemness and EMT of corneal epithelial stem cells

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