Characterization of placental transfer of polychlorinated dibenzo-p-dioxins, dibenzofurans and polychlorinated biphenyls in normal pregnancy

Kiyomi Tsukimori, Seiichi Morokuma, Tsuguhide Hori, Koji Takahashi, Teruaki Hirata, Yuka Otera, Kotaro Fukushima, Toshihiro Kawamoto, Norio Wake

研究成果: Contribution to journalArticle査読

30 被引用数 (Scopus)

抄録

Aim: Prenatal exposure to dioxins may result in many adverse health effects. However, the mechanisms by which dioxins are transferred from mother to fetus through the placenta are not well understood. The aim of this studywas to investigate the differences in dioxin concentrations between maternal blood, the placenta, and cord blood in normal pregnant women, and to identify which individual congeners of these compounds are transferred from mother to fetus through the placenta. Material and Methods: Samples were collected from 19 pregnant Japanese women. Specific congeners of seven polychlorinated dibenzo-p-dioxins (PCDDs), 10 polychlorinated dibenzofurans (PCDFs), and four nonortho polychlorinated biphenyls (PCBs) were analyzed. Results: The TEQ concentrations of PCDDs, PCDFs, and non-ortho PCBs were 8.03, 3.39, and 3.95 pg TEQ/g lipid, respectively, in the maternal blood; 8.78, 3.61, and 0.87 pg TEQ/g lipid in the placenta; and 4.33, 1.25, 1.08 pg TEQ/g lipid in the cord blood. Among specific congeners, 1,2,3,7,8-PentaCDD and 2,3,4,7,8-PentaCDF exhibited a placenta to maternal blood ratio greater than 1.0, while OctaCDD exhibited the greatest cord blood to placenta ratio. The cord blood to maternal blood ratio of total PCDDs was significantly higher than that of total PCDFs and total non-ortho PCBs. Conclusion: The dioxin concentration in cord blood was approximately half of the amount in maternal blood, despite congeners showing a high toxic equivalency factor accumulating in the placenta. PCDDs were transferred more readily than PCDFs and non-ortho PCBs from maternal blood to the fetus through the placenta.

本文言語英語
ページ(範囲)83-90
ページ数8
ジャーナルJournal of Obstetrics and Gynaecology Research
39
1
DOI
出版ステータス出版済み - 1 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • 産婦人科学

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