The angiopoietin-Tie2 signaling axis in the vascular leakage of systemic inflammation

Katelyn E. Milam, Samir M. Parikh

Research output: Contribution to journalReview articlepeer-review

68 Scopus citations


The ability of small blood vessels to undergo rapid, reversible morphological changes is essential for the adaptive response to tissue injury or local infection. A canonical feature of this response is transient hyperpermeability. However, when leakiness is profound or persistent, adverse consequences accrue to the host, including organ dysfunction and shock. A growing body of literature identifies the Tie2 receptor, a transmembrane tyrosine kinase highly enriched in the endothelium, as an important regulator of vascular barrier function in health and in disease. The principal ligands of Tie2, Angiopoietins 1 and 2, exert opposite effects on this receptor in the context of inflammation. This review will focus on recent studies that have illuminated novel aspects of the exquisitely controlled Tie2 signaling axis while proposing unanswered questions and future directions for this field of study.

Original languageEnglish (US)
JournalTissue Barriers
Issue number1
StatePublished - 2015
Externally publishedYes


  • ARDS
  • Angiopoietin
  • Anthrax
  • Barrier function
  • Endothelium
  • Inflammation
  • Lung injury
  • Malaria
  • Respiratory distress
  • Sepsis
  • Tie1
  • Tie2
  • VE-PTP
  • Vascular leakage

ASJC Scopus subject areas

  • Biochemistry
  • Histology
  • Cell Biology


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