Oxidative stress signaling pathways in myocardium (null)

Oxidative stress signaling pathways in myocardium integrate the effects of excess ROS generated in heart tissue, especially during pathological states such as heart failure, diabetic cardiomyopathy, and ischemia-reperfusion injury[2][3][4][5]. Key molecular players include NADPH oxidases (particularly NOX2 and NOX4), mitochondrial respiratory chain complexes, xanthine oxidase, uncoupled nitric oxide synthases, and regulatory kinases such as CaMKII and MAPKs[1][4]. Oxidative stress leads to cellular injury via direct damage to lipids, proteins, and nucleic acids and by triggering multiple downstream death and remodeling signals[2][3]. These pathways are associated with increased levels of lipid peroxidation products (MDA, 4-HNE) and reduced endogenous antioxidant enzyme activity[2][3][4]. Targeted therapies seek to block or modulate specific ROS-producing enzymes, enhance antioxidant defense, or interrupt downstream cell death and fibrosis pathways, but as a class of mechanisms, oxidative stress pathways have not yielded unified, highly effective treatments in clinical practice[3][5].

Other names

oxidative stress responses in myocardiummyocardial ROS pathwaysROS-mediated injury in myocardiumOS pathways in heart failureoxidative stress mechanisms in heart

Reduction of ROS production Enhancement of endogenous antioxidant defense Inhibition of pathological kinase activation Blocking the formation of cytotoxic lipid peroxidation products