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Updated: Jun 10, 2026

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Kruppel-like factor 2 regulates endothelial barrier function.

Zhiyong Lin1, Viswanath Natesan, Hong Shi

  • 1University Hospitals Harrington-McLaughlin Heart and Vascular Institute and Case Cardiovascular Research Institute, Cleveland, OH 44106-7290, USA. zhiyong.lin@case.edu

Arteriosclerosis, Thrombosis, and Vascular Biology
|July 24, 2010
PubMed
Summary
This summary is machine-generated.

Kruppel-like factor 2 (KLF2) is a novel transcriptional regulator of vascular barrier function. Studies show KLF2 deficiency increases endothelial permeability, while its overexpression attenuates it, highlighting KLF2

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Area of Science:

  • Endothelial biology
  • Vascular biology
  • Molecular mechanisms of barrier function

Background:

  • The endothelium acts as a selective barrier regulating fluid and solute exchange.
  • Perturbations in endothelial barrier function are implicated in various disease states.
  • The molecular mechanisms governing endothelial barrier integrity are not fully understood, though Kruppel-like factor 2 (KLF2) is a known regulator of endothelial function.

Purpose of the Study:

  • To investigate the role of KLF2 in regulating vascular barrier function.
  • To elucidate the molecular mechanisms by which KLF2 influences endothelial barrier integrity.

Main Methods:

  • In vivo assessment of vascular leak using Evans blue dye in KLF2(+/+) and KLF2(+/-) mice.
  • In vitro studies using adenoviral KLF2 overexpression in human umbilical vein endothelial cells (HUVECs).
  • Measurement of endothelial permeability using fluorescein isothiocyanate dextrans (FITC-dextran) passage in response to thrombin and H(2)O(2).

Main Results:

  • KLF2(+/-) mice exhibited significantly increased vascular leakage compared to KLF2(+/+) mice.
  • Adenoviral KLF2 overexpression attenuated thrombin- and H(2)O(2)-induced endothelial leakage in HUVECs.
  • KLF2 deficiency in HUVECs and primary endothelial cells from KLF2(+/-) mice led to increased permeability.

Conclusions:

  • KLF2 plays a critical role in maintaining vascular barrier integrity.
  • KLF2 acts as a transcriptional regulator conferring barrier protection.
  • KLF2 influences barrier function through effects on occludin expression and myosin light chain signaling.