Cholesteryl ester hydrolase activity in human symptomatic atherosclerosis

Area of Science:

• Biochemistry
• Cardiovascular Medicine
• Cell Biology

Background:

• Atherosclerosis is a chronic inflammatory disease characterized by plaque buildup in arteries.
• Acid cholesteryl ester hydrolase (CEH) plays a role in cholesterol metabolism.
• Symptomatic atherosclerosis, such as transient ischemic attacks (TIA), indicates advanced disease stages.

Purpose of the Study:

• To investigate the activity of acid CEH in mononuclear cells of patients with symptomatic atherosclerosis (TIA).
• To compare acid CEH levels between TIA patients and age-matched controls without atherosclerosis.
• To explore potential differences in lipid profiles between the groups.

Main Methods:

• Assay of acid CEH activity in mononuclear cells.
• Measurement of cholesterol and cholesteryl ester concentrations in mononuclear cells and plasma.
• Comparison of biochemical parameters between TIA patients and control subjects.

Main Results:

• Significantly lower acid CEH levels were observed in mononuclear cells of TIA patients compared to controls (1074 +/- 128 vs 2113 +/- 255 pmol/mg P/hr).
• No significant differences in mononuclear cell or plasma cholesterol and cholesteryl ester concentrations were found between the groups.
• TIA women exhibited lower mononuclear cell free cholesterol concentrations than men.

Conclusions:

• Reduced acid CEH activity in mononuclear cells is associated with symptomatic atherosclerosis (TIA).
• The observed decrease in CEH activity may contribute to the pathogenesis of atherosclerosis.
• Further research is warranted to elucidate the precise role of CEH in cholesterol homeostasis and cardiovascular disease progression.