Casamadrid V, Amaya CA, Mendieta ZH. Body Mass Index in Pregnancy Does Not Affect Peroxisome Proliferator-activated Receptor Gamma Promoter Region (-359 to -260) Methylation in the Neonate.
Ann Med Health Sci Res 2016;
6:38-43. [PMID:
27144075 PMCID:
PMC4849114 DOI:
10.4103/2141-9248.180272]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background:
Obesity in pregnancy can contribute to epigenetic changes.
Aim:
To assess whether body mass index (BMI) in pregnancy is associated with changes in the methylation of the peroxisome proliferator-activated receptor γ (PPAR) promoter region (-359 to - 260) in maternal and neonatal leukocytes.
Subjects and Methods:
In this matched, cohort study 41 pregnant women were allocated into two groups: (a) Normal weight (n = 21) and (b) overweight (n = 20). DNA was extracted from maternal and neonatal leukocytes (4000-10,000 cells) in MagNA Pure (Roche) using MagNA Pure LC DNA Isolation Kit 1 (Roche, Germany). Treatment of DNA (2 μg) was performed with sodium bisulfite (EZ DNA Methylation-Direct™ Kit; Zymo Research). Real-time quantitative polymerase chain reaction (qPCR) was performed in a LightCycler 2.0 (Roche) using the SYBR® Advantage® qPCR Premix Kit (Clontech). The primers used for PPARγ coactivator (PPARG) M3 were 5’- aagacggtttggtcgatc-3’ (forward), and5’- cgaaaaaaaatccgaaatttaa-3’ (reverse) and those for PPARG unmethylated were: 5’-gggaagatggtttggttgatt-3’ (forward) and 5’- ttccaaaaaaaaatccaaaatttaa-3’ (reverse). Intergroup differences were calculated using the Mann-Whitney U-test, and intragroup differences, with the Wilcoxon test (IBM SPSS Statistics for Windows, Version 19.0. Armonk, NY: IBM Corp.).
Results:
Significant differences were found in BMI, pregestational weight, and postdelivery weight between groups but not in the methylation status of the PPARγ promoter region (-359 to - 260).
Conclusion:
The PPARγ promoter region (-359 to - 260) in peripheral leukocytes is unlikely to get an obesity-induced methylation in pregnancy.
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