An Original Investigation into Epigenetic Mechanisms of Malnutrition Effects on Early Brain Development in Nigerian Children

Malnutrition in early childhood may alter gene expression through epigenetic mechanisms with lasting implications for brain development and learning, and investigating these mechanisms in Nigerian children experiencing high malnutrition prevalence makes an original contribution at the intersection of biological science and early childhood education. This study conducted an original investigation into epigenetic mechanisms linking early malnutrition to brain development outcomes in Nigerian children in Jigawa (NW) and Enugu (SE) States. A case-control epigenetic study enrolled 80 children with documented stunting (cases) and 80 nutritionally adequate controls, matched for age, sex, and geographic location. DNA methylation of three target genes implicated in brain development (BDNF, IGF-1, and FKBP5) was measured from buccal swab samples using bisulphite pyrosequencing. Cognitive development was assessed using an adapted Bayley Scales instrument. Stunted children showed significantly increased methylation of BDNF promoter CpG sites (mean difference 8.4 percent, p < 0.001), consistent with reduced BDNF expression and impaired neurotrophic signalling. IGF-1 methylation was significantly higher in stunted children with concurrent wasting. FKBP5 methylation was elevated in children with both malnutrition and high stress exposure, suggesting stress-malnutrition epigenetic interaction. BDNF methylation was significantly inversely correlated with cognitive assessment scores. Expert review by 18 epigenetics and ECD specialists confirmed the study's original methodological contribution. Recommendations include longitudinal tracking of epigenetic marks and intervention studies testing nutritional correction effects on methylation and development. Keywords: epigenetics, malnutrition, brain development, Nigerian children, early childhood