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Environmental tobacco smoke exposure during pregnancy has limited effect on infant birthweight and umbilical vein endothelial nitric oxide synthase

Hedengran, Katrine K. (författare)
Gentofte Hospital
Andersen, Malene R. (författare)
Aarhus University Hospital,Gentofte Hospital
Szecsi, Pal B. (författare)
Gentofte Hospital,Copenhagen University Hospital,Lund University
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Lindh, Christian (författare)
Lund University,Lunds universitet,Tillämpad masspektrometri inom miljömedicin,Forskargrupper vid Lunds universitet,Applied Mass Spectrometry in Environmental Medicine,Lund University Research Groups
Uldbjerg, Niels (författare)
Aarhus University Hospital
Stender, Steen (författare)
Gentofte Hospital
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 (creator_code:org_t)
2018-08-09
2018
Engelska.
Ingår i: Acta Obstetricia et Gynecologica Scandinavica. - : Wiley. - 0001-6349. ; 97:11, s. 1309-1316
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Introduction: Women who smoke, deliver significantly smaller infants. These infants have reduced levels of the vasodilator endothelial nitric oxide synthase (eNOS) levels in the umbilical vessels, which may reduce fetal growth. Serum cotinine, the degradation product of nicotine, can be used to determine the level of tobacco exposure. Newborns of environmental smokers are suggested to be smaller and shorter in weight, length, and head circumference. eNOS levels have not yet been studied in these infants. We here investigated the existence of a relation between maternal environmental tobacco smoke exposure, eNOS activity, concentration, and birthweight. Material and methods: We included 263 healthy singleton pregnancies categorized into three groups according to measured cotinine levels: 175 nonsmokers, 38 smokers, and 50 environmental smokers. Cotinine was quantified by mass spectrometry with a detection limit of.2 ng/mL; eNOS activity and concentration were measured in endothelial cells (ECs) of the umbilical vein. Results: Infants born to environmental smokers had similar weights to infants born to nonsmokers (47 g heavier, P =.48). Cotinine concentrations were.06/.09/.12 ng/mL (quartiles) in infants born to nonsmokers,.27/.37/.81 ng/mL in infants born to women exposed to environmental tobacco smoke, and 43.0/63.8/108.1 ng/mL in infants born to smokers. The eNOS concentration was 1.65 ±.92 ng/106 ECs (mean ± SD) in nonsmokers and 1.71 ± 1.00 ng/106 ECs in environmental smokers. The eNOS activity was 52.0 ± 20.6 pmol l-citrulline/min/106 ECs in nonsmokers and 48.7 ± 19.8 pmol l-citrulline/min/106 ECs in environmental smokers. Conclusions: Infants born to environmental smokers, as judged by umbilical serum cotinine levels close to.2 ng/mL, are not associated with lower birthweight or reduced eNOS activity, or concentration in the fetal vascular bed.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Hälsovetenskap -- Arbetsmedicin och miljömedicin (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Health Sciences -- Occupational Health and Environmental Health (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Reproduktionsmedicin och gynekologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Obstetrics, Gynaecology and Reproductive Medicine (hsv//eng)

Nyckelord

birthweight
cotinine
environmental tobacco smoke
newborn
nitric oxide synthase
pregnancy
smoking
tobacco

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