Cellular oxidative stress pathways in vascular smooth muscle cells

Cellular oxidative stress pathways in vascular smooth muscle cells (VSMCs) represent a complex network of biochemical processes that regulate the balance between reactive oxygen species (ROS) production and antioxidant defense mechanisms [1]. In VSMCs, ROS are primarily generated by enzymes such as NADPH oxidases (NOX1, NOX4), mitochondria, and xanthine oxidase in response to stimuli like angiotensin II, growth factors, and mechanical strain [2]. While physiological levels of ROS act as critical secondary messengers in signal transduction, an imbalance leading to oxidative stress promotes VSMC hypertrophy, migration, and phenotypic switching [3]. These cellular changes are fundamental drivers of vascular pathologies, including hypertension, atherosclerosis, and restenosis after angioplasty [4]. Therapeutic strategies often focus on specific components of these pathways, such as inhibiting NOX enzymes or activating the Nrf2-mediated antioxidant response, to mitigate oxidative damage and restore vascular function [5]. However, the complexity and redundancy of these pathways, along with the dual role of ROS in both health and disease, present significant challenges for therapeutic development [1].

Other names

VSMC oxidative stressVascular smooth muscle redox signalingOxidative stress in vascular smooth muscleROS signaling in smooth muscle cells

Modulation of reactive oxygen species (ROS) production through inhibition of enzymes like NADPH oxidase or enhancement of antioxidant defenses via Nrf2 activation.