Journal
ISCIENCE
Volume 26, Issue 9, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.isci.2023.107533
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Fetal skin and gingival tissue both have minimal scarring outcomes in wound repair. The diversity of human fetal skin fibroblasts is unique and partly overlaps with gingival fibroblasts, compared to adult skin fibroblasts.
Fetal skin achieves scarless wound repair. Dermal fibroblasts play a central role in extracellular matrix deposition and scarring outcomes. Both fetal and gingival wound repair share minimal scarring outcomes. We tested the hypothesis that compared to adult skin fibroblasts, human fetal skin fibroblast diversity is unique and partly overlaps with gingival skin fibroblasts. Human fetal skin (FS, n = 3), gingiva (HGG, n = 13), and mature skin (MS, n = 13) were compared at single-cell resolution. Dermal fibroblasts, the most abundant cluster, were examined to establish a connectome with other skin cells. Annexin1-FPR1 signaling pathway was dominant in both FS as well as HGG fibroblasts and related myeloid cells while scanty in MS fibroblasts. Myeloid-specific FPR1-ORF delivered in murine wound edge using tissue nanotransfection (TNT) technology significantly enhanced the quality of healing. Pseudotime analyses identified the co-existence of an HGG fibroblast subset with FPR1(high) myeloid cells of fetal origin indicating common underlying biological processes.
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