ANG2 is primarily produced by ECs and its expression is transcriptionally induced by numerous factors, including hypoxia, shear stress and VEGF97. In turn, the transcription factor Kruppel-like factor 2 (KlF2) downregulates EC ANG2 expression while upregulating TIE2 expression, which then contributes to the maintenance of the quiescent EC phenotype. KLF2
expression itself is regulated by shear stress, and thereby controls specific mechano-activated transcriptional