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Am J Perinatol 2023; 40(12): 1292-1299
DOI: 10.1055/s-0041-1735898
Original Article

The Anesthetic Modality but Not the Mode of Delivery Seem to Modulate the Methylation Status of Cyclooxygenase-2 Promoter of the Newborns

Suna Şerife Oğuz
1   Deparments of Pediatrics, Division of Neonatology, Neonatology Unit, Ankara City Hospital, Ankara, Turkey
,
Gözde Hayriye Kanmaz Kutman
1   Deparments of Pediatrics, Division of Neonatology, Neonatology Unit, Ankara City Hospital, Ankara, Turkey
,
Kemal Oğuz
2   Department of Internal Medicine, Başkent University Faculty of Medicine, Ankara, Turkey
› Institutsangaben Funding The study received a grant (09.14.2010/18) from the Education Planning Council of Zekai Tahir Burak Maternity Teaching Hospital, Ankara, Turkey.
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Abstract

Objective Cesarean section (CS) rates are high. Epidemiological data supports increased risk of inflammatory conditions in the offspring born by CS. Epigenetic alterations occurring during the perinatal period may account for this risk. Cyclooxygenase-2 (COX2) has strong implications for inflammatory diseases. The methylation of COX2 of newborn infants was compared with respect to their mode of delivery.

Study Design Ninety healthy term infants born by vaginal delivery (VD), planned cesarean section (PCS), or emergency CS (ECS) were recruited (30 infants in each group). For obstetric anesthesia, local (LA), regional (RA), or general (GA) anesthesia were used. Carefully selected exclusion criteria were implemented to eliminate any confounders with potential epigenetic effects. Umbilical artery blood samples were collected. Demographic and clinical characteristics, folate and CRP levels, and mean methylation levels of the COX2 gene promoter were determined.

Results Except the birth weight and maternal age parameters, VD, PCS, and ECS were similar. The methylation percentage of COX2 was higher in ECS (16.9 ± 5.1) than VD (14.5 ± 4.1) and PCS (14.8 ± 2.9), albeit p was 0.064. Because of the dual anesthetic modality populations (RA and GA) in PCS and ECS and the recent literature on anesthetics and epigenetics, the anesthetic modality groups were also analyzed. The methylation percentage of COX2 was significantly different between LA, RA, and GA groups (14.5 ± 4.1, 13.9 ± 2.8, and 17.0 ± 4.6, respectively, p = 0.012).

Conclusion When the mode of delivery is the question of debate, the anesthetic modality should be remembered as an important epigenetic modulator.

Key Points

  • Perinatal period is a vulnerable time period for epigenetic modulations.

  • The mode of delivery is influential in any potential epigenetic alterations occurring perinatally.

  • The obstetric anesthetic modality should be remembered as an important epigenetic modulator.

Keywords

cesarean section - cyclooxygenase 2 - DNA methylation - epigenetics - vaginal delivery


Publikationsverlauf

Eingereicht: 01. Mai 2021

Angenommen: 27. Juli 2021

Artikel online veröffentlicht:
29. September 2021

© 2021. Thieme. All rights reserved.

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