Oxidized low-density lipoprotein cholesterol and plaque vulnerability.

Area of Science:

• Cardiovascular Research
• Biochemistry
• Medical Imaging

Background:

• Low-density lipoprotein cholesterol (LDL-C) oxidation is a key factor in atherosclerotic plaque inflammation and progression.
• The specific relationship between LDL-C oxidation and plaque morphology in diabetes mellitus (DM) patients remains under-investigated.
• Optical coherence tomography (OCT) is a valuable tool for assessing coronary plaque morphology.

Purpose of the Study:

• To investigate the association between LDL-C oxidation levels and coronary plaque morphology.
• To determine if this association differs between patients with and without diabetes mellitus (DM).

Main Methods:

• Analysis of 138 patients with chronic coronary syndrome who underwent OCT.
• Measurement of malondialdehyde-modified LDL-C (MDA-LDL) as a marker of LDL-C oxidation.
• Assessment of plaque morphology using OCT and correlation with LDL-C oxidation levels.

Main Results:

• In diabetic patients (DM), higher LDL-C oxidation levels correlated significantly with increased lipid index and macrophage grade.
• No significant association between LDL-C oxidation and plaque morphology was observed in non-diabetic patients.
• These findings remained significant in DM patients after adjusting for confounding factors.

Conclusions:

• LDL-C oxidation levels are significantly associated with markers of plaque vulnerability.
• This association is particularly pronounced in patients with diabetes mellitus (DM).
• Further research may elucidate therapeutic targets for managing high-risk plaques in diabetic individuals.