Related Experiment Videos
Factors affecting the lipid and apolipoprotein levels of cord sera
Insights
Cord blood lipid and apolipoprotein levels at birth are influenced by various factors including gestational age and clinical disorders. These findings may offer new diagnostic insights for newborn postnatal issues.
Area of Science:
- Biochemistry
- Neonatal Medicine
- Human Physiology
Background:
- The transition from fetal to adult lipid transport systems is complex.
- Cord serum levels of lipids and apolipoproteins provide a snapshot of fetal metabolic status.
- Numerous factors can influence neonatal lipid metabolism at birth.
Purpose of the Study:
- To investigate the impact of various factors on cord serum lipid and apolipoprotein levels.
- To understand how factors like delivery method, birth weight, and gestational age affect neonatal lipid profiles.
- To explore the association between clinical disorders and altered lipid/apolipoprotein levels in newborns.
Main Methods:
- Collection of cord sera from infants.
- Measurement of various lipids and apolipoproteins (A-I, A-II, ApoB, C-I, C-II, C-III, ApoD, ApoE).
- Analysis of data in relation to delivery method, birth weight, gestational age, and clinical conditions.
Main Results:
- Gestational age significantly impacts serum lipids and apolipoproteins; maturity leads to decreased cholesterol and increased triglycerides/ApoD.
- Birth weight correlates with changes in free cholesterol, C-I, C-III, and ApoE.
- Clinical disorders like anencephaly and respiratory distress show distinct alterations in lipid and apolipoprotein profiles.
- Infants of diabetic mothers with carbohydrate issues exhibit reduced triglyceride and ApoD levels.
Conclusions:
- Multiple factors significantly affect neonatal lipid and apolipoprotein levels at birth.
- Gestational age is a key determinant of fetal lipid metabolism.
- Observed changes in cord serum lipids and apolipoproteins in various clinical scenarios may aid in diagnosing postnatal complications.
Abstract:
In studying the human lipid transport system as it changes from the fetal to the adult form, data were collected on cord sera levels of lipids and apolipoproteins (A-I, A-II, ApoB, C-I, C-II, C-III, ApoD, and ApoE) from infants whose lipid metabolism might have been modified by a variety of factors present before, at, or after delivery. The results clearly indicated that many factors affect the levels of both lipids and apolipoproteins at birth. Method of delivery had little effect except in relation to either fetal immaturity (increased total cholesterol) or fetal stress (increased triglycerides). Birth weight was related to changes in free cholesterol, C-I, C-III, and ApoE levels. Gestational age had greater impact upon both serum lipids and apolipoproteins. With increasing fetal maturity, total cholesterol, free cholesterol, A-II, C-II, and ApoE progressively fell whereas triglyceride and ApoD rose. A variety of clinical disorders were also associated with changes in serum lipid and apolipoproteins. Anencephaly produced marked increases in both free and total cholesterol as well as most apolipoproteins. Significant reductions in triglyceride and ApoD levels were found in infants who subsequently became ill in the postnatal period with problems relating to carbohydrate metabolism (e.g., infants of diabetic mothers). Infants with respiratory distress were found to have decreased levels of total cholesterol and ApoB, both of which are increased in prematurity, a condition with which respiratory distress (RD) is usually associated. The changes in cord sera lipid and apolipoprotein levels found in a variety of clinical situations may provide new diagnostic approaches to postnatal problems arising in the newborn.