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诱导多能干细胞和眼眶脂肪来源干细胞在脱细胞人角膜上的诱导角膜上皮分化。

Induction of Corneal Epithelial Differentiation of Induced Pluripotent and Orbital Fat-Derived Stem Cells Seeded on Decellularized Human Corneas.

机构信息

Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Avenida Presidente Antônio Carlos, 6627, Belo Horizonte, Minas Gerais, 31270-901, Brazil.

Department of Genomic Sciences and Biotechnology, Catholic University of Brasilia, QS 07 - Lote 01, EPCT - Taguatinga, Brasília, Distrito Federal, 71966-700, Brazil.

出版信息

Stem Cell Rev Rep. 2022 Oct;18(7):2522-2534. doi: 10.1007/s12015-022-10356-6. Epub 2022 Mar 5.

Abstract

Up to 40% of donor corneas are deemed unsuitable for transplantation, aggravating the shortage of graft tissue. In most cases, the corneal extracellular matrix is intact. Therefore, their decellularization followed by repopulation with autologous cells may constitute an efficient alternative to reduce the amount of discarded tissue and the risk of immune rejection after transplantation. Although induced pluripotent (hiPSCs) and orbital fat-derived stem cells (OFSCs) hold great promise for corneal epithelial (CE) reconstruction, no study to date has evaluated the capacity of decellularized corneas (DCs) to support the attachment and differentiation of these cells into CE-like cells. Here, we recellularize DCs with hiPSCs and OFSCs and evaluate their differentiation potential into CE-like cells using animal serum-free culture conditions. Cell viability and adhesion on DCs were assessed by calcein-AM staining and scanning electron microscopy. Cell differentiation was evaluated by RT-qPCR and immunofluorescence analyses. DCs successfully supported the adhesion and survival of hiPSCs and OFSCs. The OFSCs cultured under differentiation conditions could not express the CE markers, TP63, KRT3, PAX6, and KRT12, while the hiPSCs gave rise to cells expressing high levels of these markers. RT-qPCR data suggested that the DCs provided an inductive environment for CE differentiation of hiPSCs, supporting the expression of PAX6 and KRT12 without the need for any soluble induction factors. Our results open the avenue for future studies regarding the in vivo effects of DCs as carriers for autologous cell transplantation for ocular surface reconstruction.

摘要

高达 40%的供体角膜被认为不适合移植,加剧了移植物组织的短缺。在大多数情况下,角膜细胞外基质是完整的。因此,对其进行去细胞化处理,然后用自体细胞再填充,可能是减少丢弃组织数量和降低移植后免疫排斥风险的有效替代方法。尽管诱导多能干细胞(hiPSCs)和眼眶脂肪来源的干细胞(OFSCs)在角膜上皮(CE)重建方面具有巨大的应用前景,但迄今为止尚无研究评估去细胞化角膜(DCs)对这些细胞附着和分化为 CE 样细胞的支持能力。在这里,我们用 hiPSCs 和 OFSCs 再细胞化 DCs,并在无动物血清的培养条件下评估它们分化为 CE 样细胞的潜力。通过钙黄绿素-AM 染色和扫描电子显微镜评估细胞活力和在 DCs 上的黏附性。通过 RT-qPCR 和免疫荧光分析评估细胞分化。DCs 成功支持 hiPSCs 和 OFSCs 的黏附和存活。在分化条件下培养的 OFSCs 不能表达 CE 标志物 TP63、KRT3、PAX6 和 KRT12,而 hiPSCs 则产生表达这些标志物水平较高的细胞。RT-qPCR 数据表明,DCs 为 hiPSC 的 CE 分化提供了诱导环境,支持 PAX6 和 KRT12 的表达,而无需任何可溶性诱导因子。我们的结果为未来关于 DCs 作为载体用于自体细胞移植进行眼表重建的体内效应的研究开辟了道路。

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