Transplantation of human induced pluripotent stem cell derived keratinocytes accelerates deep second-degree burn wound healing.

{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:37545758", "kind": "science-record", "revision": 5, "content_hash": "sha256:0c41502b932c76a6231f54e271ea793263bbff46d3577a3f2ab57205f76a09a6", "created_at": "2026-11-01T19:02:19Z", "updated_at": "2026-11-01T22:52:27Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "Transplantation of human induced pluripotent stem cell derived keratinocytes accelerates deep second-degree burn wound healing.", "doi": "10.4252/wjsc.v15.i7.713", "pmid": "37545758", "authors": ["Li-Jun Wu", "Wei Lin", "Jian-Jiang Liu", "Wei-Xin Chen", "Wen-Jun He", "Yuan Shi", "Xiao Liu", "Ke Li"], "journal": "World journal of stem cells", "year": 2023, "abstract": "BACKGROUND: Current evidence shows that human induced pluripotent stem cells (hiPSCs) can effectively differentiate into keratinocytes (KCs), but its effect on skin burn healing has not been reported.\nAIM: To observe the effects of hiPSCs-derived KCs transplantation on skin burn healing in mice and to preliminarily reveal the underlying mechanisms.\nMETHODS: An analysis of differentially expressed genes in burn wounds based on GEO datasets GSE140926, and GSE27186 was established. A differentiation medium containing retinoic acid and bone morphogenetic protein 4 was applied to induce hiPSCs to differentiate into KCs. The expression of KCs marker proteins was detected using immunofluorescence staining. A model of a C57BL/6 mouse with deep cutaneous second-degree burn was created, and then phosphate buffered saline (PBS), hiPSCs-KCs, or hiPSCs-KCs with knockdown of COL7A1 were injected around the wound surface. The wound healing, re-epithelialization, engraftment of hiPSCs-KCs into wounds, proinflammatory factor level, and the NF-κB pathway proteins were assessed by hematoxylin-eosin staining, carboxifluorescein diacetate succinimidyl ester (CFSE) fluorescence staining, enzyme linked immunosorbent assay, and Western blotting on days 3, 7, and 14 after the injection, respectively. Moreover, the effects of COL7A1 knockdown on the proliferation and migration of hiPSCs-KCs were confirmed by immunohistochemistry, EdU, Transwell, and damage repair assays.\nRESULTS: HiPSCs-KCs could express the hallmark proteins of KCs. COL7A1 was down-regulated in burn wound tissues and highly expressed in hiPSCs-KCs. Transplantation of hiPSCs-KCs into mice with burn wounds resulted in a significant decrease in wound area, an increase in wound re-epithelialization, a decrease in proinflammatory factors content, and an inhibition of NF-κB pathway activation compared to the PBS group. The in vitro assay showed that COL7A1 knockdown could rescue the inhibition of hiPSCs-KCs proliferation and migration, providing further evidence that COL7A1 speeds up burn wound healing by limiting cell proliferation and migration.\nCONCLUSION: In deep, second-degree burn wounds, COL7A1 can promote KC proliferation and migration while also suppressing the inflammatory response.", "claims": [{"id": "claim-method", "statement": "Kruskal-Walli’s test was used for the non-parametric statistical analysis. Differences among more than two groups in the above assays were estimated using one-way ANOVA, with P < 0.05 considered significant.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:37545758", "locator": "sections[17] \"Statistical analysis\" paragraph 2", "quote": "Kruskal-Walli’s test was used for the non-parametric statistical analysis. Differences among more than two groups in the above assays were estimated using one-way ANOVA, with P < 0.05 considered significant."}], "state": "complete"}, {"id": "claim-data-access", "statement": "The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request at likefggf@163.com.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:37545758", "locator": "sections[39] \"Data sharing statement\" paragraph 2", "quote": "The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request at likefggf@163.com."}], "state": "complete"}, {"id": "claim-target-result", "statement": "In deep, second-degree burn wounds, COL7A1 can promote KC proliferation and migration while also suppressing the inflammatory response.", "kind": "qualitative", "target": null, "evidence": [{"asset": "source:pmid:37545758", "locator": "sections[0] \"Abstract\" paragraph 5", "quote": "In deep, second-degree burn wounds, COL7A1 can promote KC proliferation and migration while also suppressing the inflammatory response."}], "state": "complete"}], "gaps": []}, "experiment": {"state": "complete", "objective": "In deep, second-degree burn wounds, COL7A1 can promote KC proliferation and migration while also suppressing the inflammatory response.", "steps": [{"id": "read_published_estimate", "order": 1, "name": "Read the published estimate from the source", "kind": "other", "state": "complete", "blocked_on": null, "description": "The claim, method and evidence span published with the source article.", "duration_hours": null, "parameters": {}, "inputs": ["source:pmid:37545758"], "outputs": ["the published estimate and its evidence"], "instruments": [], "reagents": []}, {"id": "obtain_source_data", "order": 2, "name": "Obtain the source data from the named repository", "kind": "data-preparation", "state": "complete", "blocked_on": null, "description": "The GEO series accession resolves and its sample accessions are listed. 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