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Changes in content and composition of brain phospholipids in malnourished children
Insights
Severe malnutrition in early childhood impacts brain phospholipid composition. Sphingomyelin levels were selectively reduced in the brains of malnourished children over one year old.
Area of Science:
- Neuroscience
- Biochemistry
- Pediatric Nutrition
Background:
- Severe malnutrition in early childhood can affect brain development and composition.
- Phospholipids are crucial components of brain cell membranes.
- Understanding lipid changes in the developing brain is vital for nutritional interventions.
Purpose of the Study:
- To investigate the content and composition of phospholipids in the brains of severely malnourished children.
- To compare these findings with well-nourished children.
- To identify specific phospholipid alterations associated with early-life malnutrition.
Main Methods:
- Brain tissue (forebrain, brain stem, cerebellum) was analyzed from malnourished children (died from severe malnutrition, <2 years) and controls (died from accidents/non-CNS illnesses).
- Phospholipid concentration and phospholipid:DNA ratios were determined.
- Analysis included assessment of individual phospholipid classes.
Main Results:
- Overall phospholipid concentration (dry weight) was similar between malnourished and well-nourished children, except in some infants under 1 year.
- Phospholipid:DNA ratio was elevated in the forebrain and cerebellum of most malnourished children under 1 year.
- Sphingomyelin was selectively decreased in all brain regions of malnourished children aged 1 year and older.
Conclusions:
- Early-life severe malnutrition does not significantly alter overall brain phospholipid concentration but can affect phospholipid:DNA ratios.
- A selective decrease in sphingomyelin is a key finding in malnourished children over 1 year old.
- These findings highlight specific lipid alterations in the developing brain due to malnutrition, potentially impacting neuronal function.
Abstract:
The content and composition of phospholipids were studied in the brain of children who died from severe malnutrition within the first 2 years of life, and compared with those obtained from well-nourished children who died of accidents, or of illnesses not known to affect the central nervous system. Each brain was separated into the constituent major parts--the forebrain, brain stem, and the cerebellum. With the exception of a few marasmic children under 1 year of age whose forebrain and cerebellum had higher phospholipid concentration than normal, the concentration of the lipids on dry weight basis in all brain regions of the malnourished children was the same, regardless of age, as that in the children who were normal nutritionally. However, the phospholipid:DNA ratio in the forebrain and the cerebellum of most of the malnourished children under 1 year of age was higher than normal. The brain stem of only a few malnourished children aged around 1 year also had higher phospholipid:DNA ratio than normal. Among the different phospholipids, sphingomyelin was found to be selectively decreased in each brain part of the malnourished children aged 1 year or more.