Breastfeeding association with DNA methylation in the pregnancy and childhood epigenetics (PACE) consortium
Abstract
Background: Breastfeeding is associated with short- and long-term beneficial effects on child health, including greater cognitive development, and enhanced immune programming. However, the underlying biological mechanisms are only partially understood, with epigenetics emerging as a potential contributor. In this study, we aimed to investigate whether breastfeeding practices are associated with differential DNA methylation (DNAm) in childhood blood.
Results: We conducted meta-analyses of epigenome-wide association studies (meta-EWASs) in 3421 children from eleven international population-based birth cohorts from the Pregnancy And Childhood Epigenetics (PACE) Consortium. Breastfeeding was assessed as "ever" being breastfed vs. "never", and duration of any and exclusive breastfeeding. DNAm was measured in childhood blood (ages 5-12 years) using the Illumina 450 K or EPIC arrays, with cord blood at birth used as negative outcome control. At False Discovery Rate (FDR) < 5%, positive associations at six cytosine-phosphate-guanine (CpG) sites were identified in childhood blood: four with duration of exclusive breastfeeding, and three with duration of exclusive breastfeeding of more than three months compared to never. The annotated genes (ALAD, FNBP4, and CHFR) are related to developmental and immune processes. None of these CpG sites were FDR-significant in cord blood prior to breastfeeding.
Conclusions: Breastfeeding was associated with differential DNAm in childhood blood at a…
How strong is the evidence?
Evidence Hub reads this as a meta-analysis, done in people. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid. Reported size: 3,421 participants or records.
Read the paper
Related studies
- Effect of dexamethasone as an analgesic adjuvant to multimodal pain treatment after total knee arthroplasty: randomised clinical trial
- Effect of a Postoperative Multimodal Opioid-Sparing Protocol vs Standard Opioid Prescribing on Postoperative Opioid Consumption After Knee or Shoulder Arthroscopy: A Randomized Clinical Trial
- Comparison of the Post-Caesarean Analgesic Effect of Adding Dexmedetomidine to Paracetamol and Ketorolac: A Randomized Clinical Trial
- A triple-blind randomized clinical trial of different associations between dexamethasone and non-steroids anti-inflammatories for preemptive action in third molar extractions
- An open label randomized clinical trial of Indomethacin for mild and moderate hospitalised Covid-19 patients
- Oral paracetamol and/or ibuprofen for treating pain after soft tissue injuries: Single centre double-blind, randomised controlled clinical trial
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.