iScience (Sep 2023)

Human fetal dermal fibroblast-myeloid cell diversity is characterized by dominance of pro-healing Annexin1-FPR1 signaling

  • Rajneesh Srivastava,
  • Kanhaiya Singh,
  • Ahmed S. Abouhashem,
  • Manishekhar Kumar,
  • Sedat Kacar,
  • Sumit S. Verma,
  • Sujit K. Mohanty,
  • Mithun Sinha,
  • Subhadip Ghatak,
  • Yi Xuan,
  • Chandan K. Sen

Journal volume & issue
Vol. 26, no. 9
p. 107533

Abstract

Read online

Summary: 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 FPR1high myeloid cells of fetal origin indicating common underlying biological processes.

Keywords