Associations between levels of hydroxylated PCBs and PCBs in serum of pregnant women and blood thyroid hormone levels and body size of neonates
| Autor: | Kazuhisa Shimodaira, Nobumasa Kato, Nagako Ariki, Emiko Suzuki, Hiroaki Takemori, Yoko Komine, Kiyohiko Watanabe, Takumi Takasuga, Takashi Okai, Yumiko Noda, Maiko Koyama, Noriko Watanabe, Jun Yoshinaga, Miyako Shirakawa, Aya Hisada |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
medicine.medical_specialty
Thyroid Hormones Thyrotropin Body size Hydroxylation Fetal Development Thyroid-stimulating hormone Pregnancy Risk Factors Internal medicine medicine Birth Weight Body Size Humans Whole blood Chemistry Thyroid Public Health Environmental and Occupational Health Infant Newborn food and beverages medicine.disease Polychlorinated Biphenyls Thyroxine Endocrinology medicine.anatomical_structure Maternal Exposure Thyroid hormones Gestation Regression Analysis Female Hormone |
| Zdroj: | International journal of hygiene and environmental health. 217(4-5) |
| ISSN: | 1618-131X |
| Popis: | The purpose of this study was to investigate possible associations between concentrations of hydroxylated PCBs (OH-PCBs) and PCBs in the serum of women in the first trimester of pregnancy and thyroid hormone levels and body size of newborn infants in 79 mother-neonate pairs. We measured 16 OH-PCB isomers and 29 PCB isomers in the serum of Japanese women sampled at 11.1±1.9 weeks of gestation. The concentrations of free thyroxine (fT4) and thyroid stimulating hormone (TSH) were measured in whole blood spots on filter papers sampled from the neonates. Dietary and lifestyle information of the mothers were obtained by self-administered questionnaires. Geometric mean (GM) concentrations of the sum of 16 OH-PCB isomers and of 29 PCB isomers were 1.2×10(2)pg/g wet wt. and 69ng/g lipid wt., respectively, in maternal serum. The GM concentrations of neonatal fT4 and TSH were 2.21ng/dL and 1.37μIU/mL, respectively. Multiple regression analysis was performed using measures of neonatal thyroid hormones as dependent variable and serum levels of OH-PCBs/PCBs and other potential covariates (age, pre-pregnancy weight, smoking status, etc.) as independent variables. The results demonstrated a significant positive association between the concentrations of some OH-PCB isomers and that of neonatal TSH. There were no significant associations between levels of PCBs and neonatal fT4, or between OH-PCBs/PCBs and body size of neonates. We conclude that exposure to/body burden of OH-PCBs, but not PCBs, at environmental levels during the first trimester of pregnancy can affect neonatal thyroid hormone status. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect