Serum lipid and apolipoprotein profiles after onset of acute myocardial infarction
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Following acute myocardial infarction, HDL-cholesterol, apo A-I, and apo A-II significantly decreased. Other lipid and apolipoprotein levels remained largely unchanged in this 28-day study.
Area of Science:
- Cardiology
- Biochemistry
- Clinical Lipidology
Background:
- Acute myocardial infarction (AMI) triggers significant metabolic changes.
- Understanding lipid and apolipoprotein dynamics post-AMI is crucial for patient management.
Purpose of the Study:
- To investigate the temporal changes in serum lipid and apolipoprotein concentrations in patients after acute myocardial infarction.
- To identify specific biomarkers that show significant alterations during the recovery period.
Main Methods:
- Serum samples from eleven AMI patients were analyzed periodically for 28 days post-infarction.
- Measurements included HDL-cholesterol, total cholesterol, triglycerides, phospholipids, free fatty acids, and apolipoproteins (A-I, A-II, B, C-I, C-II, C-III, E).
- Apolipoprotein concentrations were determined using electroimmunoassay.
Main Results:
- A significant and sustained decrease in HDL-cholesterol was observed by day 7 post-infarction.
- Apo A-I and Apo A-II levels were significantly reduced by days 4-5, remaining low until day 10, with partial recovery by day 28.
- Apo B, C-I, C-II, C-III, and E levels showed no significant changes. Total cholesterol and triglycerides tended to decrease, while free fatty acids were elevated initially.
- Serum phospholipids significantly decreased by days 7-10.
Conclusions:
- Acute myocardial infarction leads to a significant and prolonged decrease in HDL-cholesterol, apo A-I, and apo A-II.
- These specific lipoprotein components may serve as indicators of cardiac injury and recovery.
- Further research is warranted to explore the clinical implications of these findings in cardiovascular disease management.
Abstract:
The concentrations of lipids and apolipoproteins in serum following onset of acute myocardial infarction were measured periodically in eleven patients for 28 days. Significant and sustained decrease in the concentration of HDL-cholesterol was observed by the seventh days post-infarction and remained low throughout the remainder of the study. The concentration of apo A-I and apo A-II assayed by electroimmunoassay was significantly low by 4th and 5th days post-infarction, remained low until day 10 and then began to increase but were not back to the initial values by 28 days post-infarction. Apo B, C-I, C-II, C-III, and E levels remained unchanged throughout the course. The concentrations of total cholesterol, triglycerides tended to fall reaching the lowest levels on day 7 and 10, but were not significant. The concentration of serum phospholipids level tended to decrease and fall significantly by day 7 and 10. The concentration of the free fatty acids in the serum was elevated during the first 2 days post-infarction and was within the normal range throughout the remainder of the study.