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Evolution of lipoprotein patterns in newborns
Insights
Newborn lipid profiles, including cholesterol and apolipoproteins, change significantly in the first week of life. Measuring these markers at 7 days offers a better screening for congenital hypercholesterolemia than cord blood.
Area of Science:
- Neonatal physiology
- Lipid metabolism
- Cardiovascular health
Background:
- Infant lipid profiles are crucial for early detection of metabolic disorders.
- Understanding early lipoprotein evolution informs long-term cardiovascular risk assessment.
- Congenital hypercholesterolemia screening requires reliable early indicators.
Purpose of the Study:
- To track the changes in plasma lipids and apolipoproteins in newborns during the first month of life.
- To determine the optimal time point for screening neonatal lipid disorders.
- To evaluate the utility of specific lipid ratios as predictors of atherosclerosis.
Main Methods:
- Plasma levels of total cholesterol, HDL cholesterol, apo B, and apo A-I were measured in 30 newborns.
- Samples were collected at birth (cord blood), 7 days, and 30 days of life.
- Cholesterol/apoprotein ratios (LDL and HDL) were analyzed.
Main Results:
- Newborns exhibit low LDL cholesterol and apo B at birth, with rapid increases by day 7.
- HDL cholesterol and apo A-I levels are high at birth and increase gradually.
- Cholesterol/apoprotein ratios remained stable within LDL and HDL classes throughout the study period.
Conclusions:
- Plasma lipid and apoprotein levels at 7 days are more indicative of neonatal metabolic status than cord blood levels.
- Screening for congenital hypercholesterolemia may be more effective at 7 days of life.
- Cholesterol/apo B and apo B/apo A-I ratios are valuable screening parameters for predicting atherosclerosis risk.
Abstract:
The plasma levels of total and high-density lipoprotein cholesterol and of the major apolipoproteins (apo B and apo A-I) were studied in 30 newborns, on cord blood and after 7 and 30 days of life. The evolution of these parameters during the first month of life shows that newborns have low LDL cholesterol and apo B levels at birth, which increase drastically during the first week and remain constant between 7 and 30 days. The HDL cholesterol and apo A-I levels are proportionally high at birth and keep increasing slowly up to 30 days. During this period, the cholesterol/apoprotein ratio remains constant in the LDL and HDL class. These data suggest that lipid and apoprotein levels at 7 days are more representative than cord-blood levels and more meaningful for a screening of congenital hypercholesterolemia. The cholesterol/apo B and apo B/apo A-I ratios, which are considered to be better predictive factors for atherosclerosis, should be included as screening parameters.