Vascular endothelial growth factor-d modulates caliber and function of initial lymphatics in the dermis

Sophie Paquet-Fifield, Sidney M. Levy, Teruhiko Sato, Ramin Shayan, Tara Karnezis, Natalia Davydova, Cameron Nowell, Sally Roufail, Gerry Zhi Ming Ma, You Fang Zhang, Steven A. Stacker, Marc G. Achen

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

The lymphatic vasculature is important for skin biology as it maintains dermal fluid homeostasis. However, the molecular determinants of the form and function of the lymphatic vasculature in skin are poorly understood. Here, we explore the role of vascular endothelial growth factor-d (Vegf-d), a lymphangiogenic glycoprotein, in determining the form and function of the dermal lymphatic network, using Vegf-d-deficient mice. Initial lymphatic vessels in adult Vegf-d-deficient mice were significantly smaller than wild-type but collecting lymphatics were unaltered. The uptake/transport of dextran in initial lymphatics of Vegf-d-deficient mice was far less efficient, indicating compromised function of these vessels. The role of Vegf-d in modulating initial lymphatics was further supported by delivery of Vegf-d in skin of wild-type mice, which promoted enlargement of these vessels. Vegf-d-deficient mice were subjected to cutaneous wounding to challenge lymphatic function: the resulting wound epithelium was highly edematous and thicker, reflecting inadequate lymphatic drainage. Unexpectedly, myofibroblasts were more abundant in Vegf-d-deficient wounds leading to faster wound closure, but resorption of granulation tissue was compromised suggesting poorer-quality healing. Our findings demonstrate that Vegf-d deficiency alters the caliber of initial lymphatics in the dermis leading to reduced functional capacity. 

Original languageEnglish
Pages (from-to)2074-2084
Number of pages11
JournalJournal of Investigative Dermatology
Volume133
Issue number8
DOIs
Publication statusPublished - Aug 2013
Externally publishedYes

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