KLF2 is a sequence-specific DNA-binding transcription factor that activates target genes including HBB and NOV 1. KLF2 functions as a mechanosensitive regulator of endothelial homeostasis, responding to laminar fluid shear stress to promote vasodilation and suppress vascular inflammation 2. In endothelial cells, KLF2 directly binds to UCP2 promoter regions to upregulate its transcription, thereby suppressing pro-inflammatory gene expression and protecting against atherosclerosis development 2. KLF2 also regulates S1PR1 signaling to promote ischemia-induced angiogenesis 3. Beyond vascular biology, KLF2 functions downstream of thyroid hormone receptor-β signaling to promote alveolar type-2 cell differentiation and suppress pulmonary fibrosis 4. In neutrophils, KLF2 regulates NETosis pathways to control thrombosis and prevent cardiac hypertrophy during angiotensin II-induced stress 5. KLF2 also contributes to pluripotency maintenance in human stem cells when co-expressed with NANOG 6. Clinically, KLF2 represents a therapeutic target in cardiovascular and pulmonary diseases; γ-protocadherin inhibition of KLF2 promotes atherosclerosis 7, while HEG1-mediated KLF2 induction protects against atherosclerosis 8. KLF2 dysregulation appears relevant to endometriosis pathogenesis 9.