Abstract:
:Our knowledge of transcriptional heterogeneities in epithelial stem and progenitor cell compartments is limited. Epidermal basal cells sustain cutaneous tissue maintenance and drive wound healing. Previous studies have probed basal cell heterogeneity in stem and progenitor potential, but a comprehensive dissection of basal cell dynamics during differentiation is lacking. Using single-cell RNA sequencing coupled with RNAScope and fluorescence lifetime imaging, we identify three non-proliferative and one proliferative basal cell state in homeostatic skin that differ in metabolic preference and become spatially partitioned during wound re-epithelialization. Pseudotemporal trajectory and RNA velocity analyses predict a quasi-linear differentiation hierarchy where basal cells progress from Col17a1Hi/Trp63Hi state to early-response state, proliferate at the juncture of these two states, or become growth arrested before differentiating into spinous cells. Wound healing induces plasticity manifested by dynamic basal-spinous interconversions at multiple basal transcriptional states. Our study provides a systematic view of epidermal cellular dynamics, supporting a revised "hierarchical-lineage" model of homeostasis.
journal_name
Cell Repjournal_title
Cell reportsauthors
Haensel D,Jin S,Sun P,Cinco R,Dragan M,Nguyen Q,Cang Z,Gong Y,Vu R,MacLean AL,Kessenbrock K,Gratton E,Nie Q,Dai Xdoi
10.1016/j.celrep.2020.02.091subject
Has Abstractpub_date
2020-03-17 00:00:00pages
3932-3947.e6issue
11issn
2211-1247pii
S2211-1247(20)30265-5journal_volume
30pub_type
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