FGFR2 is a Crucial Factor for Adipose-Derived Mesenchymal Stem Cells in Promoting Diabetic Foot Ulcer Healing Through Angiogenesis.

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Mesenchymal stem cells (MSCs) have shown potential in promoting DFU healing; however, the underlying mechanisms are not yet fully understood. This study investigates the role of adipose-derived mesenchymal stem cells (ADSCs) in DFU healing, with a particular focus on angiogenesis. Gene expression profiles from the GSE7014 and GSE80178 datasets in the Gene Expression Omnibus (GEO) database were analyzed. Differentially expressed genes (DEGs) were intersected with angiogenesis-related genes from the GeneCards database, identifying 35 angiogenesis-related DEGs (An-DEGs). Key genes were selected using Cytoscape software and machine learning. The pro-angiogenic effects of ADSCs were validated through in vivo and in vitro experiments, assessing their role in DFU healing. The DEGs from DFU patients were enriched in pathways such as angiogenesis and collagen-containing extracellular matrix. ADSCs promoted angiogenesis and wound healing by upregulating FGFR2 and secreting FGF, activating the FGF-PI3K/Akt-HIF-1α-VEGF axis. Additionally, ADSCs mediated secretion of VEGF concerting this effect. FGFR2 plays a pivotal role in ADSCs' mediated DFU healing by driving angiogenesis.", "claims": [{"id": "claim-method", "statement": "Differential expression analysis was carried out using GEO2R (https://www.ncbi.nlm.nih.gov/geo/geo2r/). Genes with an absolute log2 fold change (|log2FC|) > 1 and an adjusted p value < 0.05 were identified as DEGs and used for subsequent functional enrichment analysis.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:41230809", "locator": "sections[3] \"Identification of Differentially Expressed Genes\" paragraph 2", "quote": "Differential expression analysis was carried out using GEO2R (https://www.ncbi.nlm.nih.gov/geo/geo2r/). Genes with an absolute log2 fold change (|log2FC|) > 1 and an adjusted p value < 0.05 were identified as DEGs and used for subsequent functional enrichment analysis."}], "state": "complete"}, {"id": "claim-data-access", "statement": "The data that support the findings of this study are available from the corresponding author upon reasonable request.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:41230809", "locator": "sections[31] \"Data Availability Statement\" paragraph 2", "quote": "The data that support the findings of this study are available from the corresponding author upon reasonable request."}], "state": "complete"}, {"id": "claim-target-result", "statement": "ADSCs promoted angiogenesis and wound healing by upregulating FGFR2 and secreting FGF, activating the FGF‐PI3K/Akt‐HIF‐1α‐VEGF axis.", "kind": "qualitative", "target": null, "evidence": [{"asset": "source:pmid:41230809", "locator": "sections[0] \"Abstract\" paragraph 1", "quote": "ADSCs promoted angiogenesis and wound healing by upregulating FGFR2 and secreting FGF, activating the FGF‐PI3K/Akt‐HIF‐1α‐VEGF axis."}], "state": "complete"}], "gaps": []}, "experiment": {"state": "complete", "objective": "ADSCs promoted angiogenesis and wound healing by upregulating FGFR2 and secreting FGF, activating the FGF‐PI3K/Akt‐HIF‐1α‐VEGF axis.", "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:41230809"], "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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