Systemic sclerosis & Raynaud's

ERG Regulates Lymphatic Vessel Specification Genes and Its Deficiency Impairs Wound Healing‐Associated Lymphangiogenesis

Arthritis RheumatolPublished Mechanistic study

Authors' conclusion

ERG and FLI-1 are essential regulators of blood and lymphatic vessel regeneration.

Study context

Population
Skin biopsy samples from patients with systemic sclerosis (SSc) and healthy controls; human dermal lymphatic endothelial cells (LECs); ERG and FLI-1 knockout mice
Comparison
SSc vs healthy controls; ERG or FLI-1 deficiency
Methodological detailsimmunofluorescence of skin biopsies, microarray transcriptional analysis, Matrigel tubulogenesis assay, endothelial- and lymphatic-specific knockout mice
  • Immunofluorescence of skin biopsies
  • Microarray transcriptional analysis
  • Matrigel tubulogenesis assay
  • Endothelial- and lymphatic-specific knockout mice

Main finding

As reported in the abstract

  • ERG and FLI-1 protein levels reduced in blood and lymphatic vasculature in SSc skin biopsies
  • ERG regulates lymphatic vessel specification genes (VEGFR3/FLT-4, LYVE-1, SOX-18, PROX-1); FLI-1 enhances ERG function
  • ERG-FLT-4 pathway regulated in vitro tubulogenesis in human LECs
  • ERG or FLI-1 deficiency similarly impaired blood vessel function in mice
  • Only ERG deficiency affected lymphatic vessel regeneration during wound healing

Original publication

ERG Regulates Lymphatic Vessel Specification Genes and Its Deficiency Impairs Wound Healing‐Associated Lymphangiogenesis. Arthritis Rheumatol. Published 7 August 2024. doi:10.1002/art.42944

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