This site is intended for healthcare professionals
  • Home
  • /
  • Journals
  • /
  • Psoriasis
  • /
  • Role of bulge epidermal stem cells and TSLP signal...
Journal

Role of bulge epidermal stem cells and TSLP signaling in psoriasis

Read time: 1 mins
Published:7th Nov 2019
Author: Gago-Lopez N, Mellor LF, Megías D, Martín-Serrano G, Izeta A, Jimenez F et al.
Availability: Free full text
Ref.:EMBO Mol Med. 2019 Nov 7;11(11):e10697.
DOI:10.15252/emmm.201910697
Role of bulge epidermal stem cells and TSLP signaling in psoriasis


Psoriasis is a common inflammatory skin disease involving a cross-talk between epidermal and immune cells. The role of specific epidermal stem cell populations, including hair follicle stem cells (HF-SCs) in psoriasis is not well defined. Here, we show reduced expression of c-JUN and JUNB in bulge HF-SCs in patients with scalp psoriasis. Using lineage tracing in mouse models of skin inflammation with inducible deletion of c-Jun and JunB, we found that mutant bulge HF-SCs initiate epidermal hyperplasia and skin inflammation. Mechanistically, thymic stromal lymphopoietin (TSLP) was identified in mutant cells as a paracrine factor stimulating proliferation of neighboring non-mutant epidermal cells, while mutant inter-follicular epidermal (IFE) cells are lost over time. Blocking TSLP in psoriasis-like mice reduced skin inflammation and decreased epidermal proliferation, VEGFα expression, and STAT5 activation. These findings unravel distinct roles of HF-SCs and IFE cells in inflammatory skin disease and provide novel mechanistic insights into epidermal cell interactions in inflammation.


Read abstract on library site    Access full article