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Nutritional maternal factors affect the frequency of DNA damage in newborns
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DOI：10.1093/mutage/geag023.png)
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Abstract
En 中文
Maternal nutrition can influence genetic health during pregnancy, increasing the risk of DNA damage in both the mother and fetus. This study investigated the effect of maternal nutritional factors on DNA damage biomarkers in the mother-infant dyad. A cross-sectional study was conducted with pregnant women residing in Northeast Brazil. Participants included women aged ≥18 years in the third trimester, excluding those with non-communicable chronic diseases and smokers. Data collection included sociodemographic, lifestyle, anthropometric information, and a 76-item Food Frequency Questionnaire. The micronucleus cytome assay was performed on oral mucosa cells, with DNA damage biomarkers expressed per thousand cells (‰). Statistical analysis involved hierarchical clustering and Generalized Linear Models using Jamovi 2.5.6. The median age of the pregnant women (n = 209) was 26 years. Only 44.5% had adequate pre-pregnancy nutritional status, with a 9.5% increase in low birth weight. Total energy intake was 1842 (588–5709) kcal, with 72% consuming less than 90% of their caloric needs. The diet was predominantly hyperproteic and hyperlipidic, with over 60% showing inadequate intake of magnesium and folic acid. Among 209 participants, 80 consented to oral mucosa cell collection, and 59 mother-infant pairs were analyzed. Three maternal nutritional profiles were identified: Cluster 1 (‘Multiple Burdens of Malnutrition’), Cluster 2 (‘Low Burdens of Malnutrition’), and Cluster 3 (‘High Nutritional Intake’). While maternal nutritional profiles did not affect nuclear abnormalities in mothers, they influenced newborns. Infants of mothers in Clusters 1 and 2 exhibited more nuclear abnormalities than those in Cluster 3. Maternal nutritional inadequacy was associated with increased nuclear abnormalities in newborns, suggesting an impact on fetal genomic stability.
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