Oxidative stress, AGE, and atherosclerosis.

Area of Science:

• Biochemistry
• Molecular Biology
• Cardiovascular Research

Background:

• Atherogenesis is exacerbated by oxidative stress, advanced glycoxidation end products (AGEs), chronic inflammation, and cellular responses, particularly in diabetic patients.
• Metabolic factors (e.g., high glucose, free fatty acids) and cytokines induce reactive oxygen species (ROS) and AGEs, creating a vicious cycle that promotes atherogenesis.

Purpose of the Study:

• To review the molecular mechanisms initiating and accelerating atherogenesis.
• To elucidate the interactions between oxidative stress, AGEs, inflammation, and cellular signaling pathways.
• To explore potential therapeutic interventions targeting these molecular pathways.

Main Methods:

• Literature review focusing on molecular mechanisms of atherogenesis.
• Analysis of signaling cascades involving ROS, NAD(P)H oxidase, protein kinase C, and mitogen-activated protein kinase.
• Examination of transcription factor activation (NF-kappaB, AP-1, Sp1) and downstream gene expression.

Main Results:

• Elevated metabolic factors and cytokines induce ROS and AGEs, leading to inflammation and cellular activation.
• ROS production stimulates signaling pathways, resulting in nuclear translocation of transcription factors and cytokine gene induction.
• Animal models suggest a causal role for NAD(P)H oxidase and the AGE/RAGE/NF-kappaB axis in atherogenesis.

Conclusions:

• Atherogenesis involves a complex network of interactions between oxidative stress, AGEs, and inflammation.
• Blocking ROS or AGE formation may interrupt this detrimental cycle.
• Existing drugs (e.g., statins, ACE inhibitors) show potential antioxidant and preventive effects in cardiovascular disease.