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.
Graphical Abstract
Data Availability (data transparency)
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Code Availability (software application or custom code)
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References
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Acknowledgments
The authors thank MG Transplantes Eye Tissue Bank/FHEMIG and Sociedade Oftamológica-MG. The microscopic data was obtained using the microscopes of “Centro de Aquisição e Processamento de Imagens” (CAPI-ICB/UFMG) and Center of Microscopy/UFMG (http://www.microscopia.ufmg.br).
Funding
This work was supported by CAPES, CNPq (167447/2017–3/404326/2012–9/471732/2012–5, 304188/2019–0), FAPEMIG (RED-00570-16, APQ-03132-18), INCT-Regenera (Brazil).
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Thaís Martins: Conceptualization, Methodology, Formal analysis, Investigation, Writing-original Draft. Juliana Carvalho: Conceptualization, Resources, Writing-review & editing. Pricila Cunha: Investigation, Formal analysis. Dawidson Gomes: Resources, Writing – review & editing. Alfredo Goes: Supervision, Conceptualization, Project administration, Resources. All authors approved the final version of the manuscript.
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The Research Ethics Committee of the Universidade Federal de Minas Gerais approved the study (ETIC-UFMG n° 49967715.0.0000.5149), and it was conducted in accordance with the Declaration of Helsinki.
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Informed consent was obtained from the donors’ relatives to use corneal tissue for research purposes. The orbital fat tissues and blood were collected after obtaining informed consent from the donors.
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da Mata Martins, T.M., de Carvalho, J.L., da Silva Cunha, P. et al. Induction of Corneal Epithelial Differentiation of Induced Pluripotent and Orbital Fat-Derived Stem Cells Seeded on Decellularized Human Corneas. Stem Cell Rev and Rep 18, 2522–2534 (2022). https://doi.org/10.1007/s12015-022-10356-6
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DOI: https://doi.org/10.1007/s12015-022-10356-6