KLF2 and KLF4 control endothelial identity and vascular integrity

Area of Science:

• Vascular Biology
• Endothelial Cell Function
• Transcription Factors

Background:

• Vascular integrity is crucial for adult survival, relying on endothelial cells for barrier function, blood fluidity, and flow.
• Key regulators coordinating endothelial identity and function in adult animals are not well understood.

Purpose of the Study:

• To investigate the role of endothelial KLF2 and KLF4 in maintaining vascular integrity and endothelial function in adult animals.
• To determine the consequences of KLF2 and KLF4 deficiency in adult vasculature.

Main Methods:

• Inducible endothelial-specific deletion of Klf2 and Klf4 genes in adult mice.
• Analysis of vascular integrity, endothelial function, and coagulation system in knockout models.

Main Results:

• Endothelial KLF2 and KLF4 regulate a significant portion of the endothelial transcriptome, impacting key endothelial functions.
• Mice lacking both KLF2 and KLF4 (EC-DKO) experienced acute mortality due to myocardial infarction, heart failure, and stroke.
• EC-DKO animals displayed severe defects in vascular integrity and coagulation system dysregulation.

Conclusions:

• KLF2 and KLF4 are indispensable for maintaining endothelial and vascular integrity in adult animals.
• The absence of KLF2/4 leads to catastrophic vascular failure and lethality.