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PFKFB3 Mediated Changes in ROS/NO Balance Contribute to Endothelial Dysfunction in Obesity

Obesity is a strong risk factor for cardiovascular disease, in large part due to an altered metabolic state. One of the earliest consequences of cardiovascular dysfunction in obesity is the loss of endothelial function and impaired nitric oxide (NO) signaling. In blood vessels, NO is synthesized by endothelial nitric oxide synthase (eNOS). The biological actions of NO can be compromised by rapid inactivation by reactive oxygen species (ROS) such as superoxide that is mainly generated by NADPH oxidases (NOXs). However, the signals coordinating the increased superoxide production leading to loss of NO with altered metabolism remain unknown.