Lymphatic vessels interact dynamically with the hair follicle stem cell niche during skin regeneration in vivo

Research output: Contribution to journalJournal articleResearchpeer-review

  • Daniel Peña-Jimenez
  • Silvia Fontenete
  • Diego Megias
  • Coral Fustero-Torre
  • Osvaldo Graña-Castro
  • Donatello Castellana
  • Robert Loewe
  • Perez-Moreno, Mirna

Lymphatic vessels are essential for skin fluid homeostasis and immune cell trafficking. Whether the lymphatic vasculature is associated with hair follicle regeneration is, however, unknown. Here, using steady and live imaging approaches in mouse skin, we show that lymphatic vessels distribute to the anterior permanent region of individual hair follicles, starting from development through all cycle stages and interconnecting neighboring follicles at the bulge level, in a stem cell-dependent manner. Lymphatic vessels further connect hair follicles in triads and dynamically flow across the skin. At the onset of the physiological stem cell activation, or upon pharmacological or genetic induction of hair follicle growth, lymphatic vessels transiently expand their caliber suggesting an increased tissue drainage capacity. Interestingly, the physiological caliber increase is associated with a distinct gene expression correlated with lymphatic vessel reorganization. Using mouse genetics, we show that lymphatic vessel depletion blocks hair follicle growth. Our findings point toward the lymphatic vasculature being important for hair follicle development, cycling, and organization, and define lymphatic vessels as stem cell niche components, coordinating connections at tissue-level, thus provide insight into their functional contribution to skin regeneration.

Original languageEnglish
Article numbere101688
JournalEMBO Journal
Volume38
Issue number19
Number of pages17
ISSN0261-4189
DOIs
Publication statusPublished - 2019

    Research areas

  • hair cycle, hair follicle, lymphatic vessels, skin, stem cells

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