BACKGROUND C-reactive protein (CRP), the prototypic marker of inflammation, has been shown to be an independent predictor of cardiovascular events. Endothelial nitric oxide synthase (eNOS) deficiency is a pivotal event in atherogenesis. METHODS AND RESULTS We tested the effect of CRP on eNOS expression and bioactivity in cultured human aortic endothelial cells (HAECs). CRP decreased eNOS mRNA...

Platelets express the endothelial form of the nitric oxide synthase (eNOS) and generate NO. However, in contrast to eNOS in endothelial cells, eNOS in platelets is largely Ca(2+)-independent and the activity is regulated by phosphorylation. Platelet-derived NO plays an important role in the regulation of platelet aggregation and secretion. Changes in the activity of platelet eNOS are responsibl...

Puerarin (1) is a major effective ingredient extracted from the traditional Chinese medicine Ge-gen (Radix Puerariae, RP). Recently, puerarin has been used to treat patients with coronary artery diseases (CAD). However, the mechanisms of puerarin on CAD are still not very clear. In this study, we investigated the role of puerarin on serum nitric oxide (NO) concentration, myocardial endothelial ...

Nitric oxide derived from endothelial nitric oxide synthase (eNOS) has been shown to be a major mediator of endothelium-dependent responses in cerebral blood vessels. Loss of a single eNOS gene is not associated with any apparent negative consequences on endothelial function in most blood vessels. In contrast, we have recently demonstrated that heterozygous eNOS gene deficiency in combination w...

OBJECTIVES Extracellular superoxide dismutase (ecSOD) lowers superoxide anions and maintains vascular nitric oxide level. We studied the function of ecSOD in high-volume hypertension induced by the 1-kidney-1-clip model in wild-type, ecSOD-/- mice, and endothelial nitric oxide synthase (eNOS)-/- mice. METHODS AND RESULTS The 1-kidney-1-clip model resulted in impaired endothelium-dependent rel...

Sud N, Kumar S, Wedgwood S, Black SM. Modulation of PKC signaling alters the shear stress-mediated increases in endothelial nitric oxide synthase transcription: role of STAT3. Am J Physiol Lung Cell Mol Physiol 296: L519–L526, 2009. First published December 31, 2008; doi:10.1152/ajplung.90534.2008.—We have previously shown that the regulation of endothelial nitric oxide synthase (eNOS) in endot...

Type 2 diabetes mellitus (T2D) is a significant global public health problem that has seen substantial increase in the number of affected individuals recent decades. In murine model T2D (db/db), we found several abnormalities, including aberrant intracellular calcium concentration ([Ca2+]i), decreased glucose transport, increased production reactive oxygen species (ROS), elevated levels pro-inf...

The objective of the study is to find out whether the endothelial nitric oxide synthase (eNOS) G894T single-nucleotide polymorphism is associated with type 2 diabetes mellitus in South Indian (Tamil) population. A total number of 260 subjects comprising 100 type 2 diabetic mellitus patients and 160 healthy individuals with no documented history of diabetes were included for the study. DNA was i...

This study examines the notion that heat shock protein (HSP) 90 binding to nitric oxide (NO), endothelial NO synthase (eNOS), and PI3K-Akt regulate angiopoietin (Ang)-1-induced angiogenesis in porcine coronary artery endothelial cells (PCAEC). Exposure to Ang-1 (250 ng/ml) for periods up to 2 h resulted in a time-dependent increase in eNOS phosphorylation at Ser 1177 that occurred by 5 min and ...

Hepatic ischemia reperfusion injury (HIRI) is a clinical condition which may lead to cellular injury and organ dysfunction. The role of nitric oxide (NO) in HIRI is complicated and inconclusive. NO produced by endothelial nitric oxide synthase (eNOS) activation plays a protective role during early HIRI. But eNOS overexpression and the resulting excessive NO bioavailability can aggravate liver i...