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- Bakolis, I, et al.
(författare)
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Respiratory health and endotoxin : associations and modification by CD14/-260 genotype
- 2012
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Ingår i: European Respiratory Journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 39:3, s. 573-581
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Tidskriftsartikel (refereegranskat)abstract
- Exposure to endotoxin has been associated with increased respiratory symptoms and decrements in lung function in occupational settings but little is known about health effects of domestic exposure in adults. We describe the association of respiratory disease, IgE sensitisation, bronchial reactivity and lung function with mattress endotoxin levels in adults and determine whether these associations are modified by polymorphisms in CD14.Endotoxin levels in mattress dust from a population based sample of 972 adults were measured. Associations were examined using generalized linear mixed models, adjusting for individual and household confounders. Effect modification of these associations by CD14/-260 (rs2569190) was assessed.Mattress endotoxin levels varied from 0.1 to 402.6 EU·mg(-1). Although there was no overall association of lung function with endotoxin exposure, there was evidence that the association of FEV1 and FVC with endotoxin was modified by CD14/-260 genotype (p for interaction 0.005 and 0.013 respectively). There was no evidence that symptoms, IgE sensitisation or bronchial reactivity was associated with mattress endotoxin levels.In this large epidemiological study of adults there was no evidence that mattress endotoxin level was associated with respiratory symptoms or IgE sensitisation but the association of lung function with endotoxin levels may be modified by CD14-genotype.
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- Høyer, B B, et al.
(författare)
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Body mass index in young school age children in relation to organochlorine compounds in early life: a prospective study.
- 2014
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Ingår i: International Journal of Obesity. - : Springer Science and Business Media LLC. - 1476-5497 .- 0307-0565. ; 38:7, s. 919-925
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Tidskriftsartikel (refereegranskat)abstract
- Objective:To investigate the association between maternal pregnancy and estimated postnatal serum concentrations of the organochlorines 2,2',4,4',5,5'-hexachlorobiphenyl (CB-153) and 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (p,p'-DDE) and body mass index (BMI) z-scores in five to nine-year-old children.Methods:Maternal sera from the INUENDO birth cohort (2002-2004) comprising mother-child pairs (N=1109) from Greenland, Warsaw (Poland) and Kharkiv (Ukraine) were analysed for CB-153 and p,p'-DDE, using gas chromatography-mass-spectrometry, and were grouped into tertiles for statistical analyses. A toxicokinetic model was used to estimate the first 12 months cumulative exposure to the compounds. Associations between these compounds and child age- and sex-specific BMI z-scores were calculated at follow-up (2010-2012), using multiple linear regression analysis.Results:No clear associations between pregnancy CB-153 and p,p'-DDE and child BMI were observed (the pooled differences in BMI z-score (95% confidence interval) comparing 3rd tertile to 1st tertile were -0.07 (-0.32 to 0.18) and -0.10 (-0.30 to 0.10) kg m(-2), respectively). For postnatal CB-153 and p,p'-DDE and BMI, the overall differences in BMI z-score comparing 3rd tertile to 1st tertile were 0.12 (-0.15 to 0.39) and -0.03 (-0.20 to 0.27) kg m(-2), respectively.Conclusions:This follow-up study of Greenlandic, Polish and Ukrainian populations showed no clear association between pregnancy and postnatal exposure to p,p'-DDE and CB-153 and BMI at the age of five to nine years.International Journal of Obesity accepted article peview online, 10 April 2014; doi:10.1038/ijo.2014.58.
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- Toft, G., et al.
(författare)
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Exposure to perfluorinated compounds and human semen quality in arctic and European populations
- 2012
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Ingår i: Human Reproduction. - : Oxford University Press (OUP). - 0268-1161 .- 1460-2350. ; 27:8, s. 2532-2540
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Tidskriftsartikel (refereegranskat)abstract
- Perfluorinated compounds (PFCs) have been suspected to adversely affect human reproductive health. The aim of this study was to investigate the associations between PFC exposure and male semen quality. PFCs were measured in serum from 588 partners of pregnant women from Greenland, Poland and Ukraine who provided a semen sample, using liquid chromatography tandem mass spectrometry. Perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), perfluorohexane sulfonic acid (PFHxS) and perfluorononanoic acid (PFNA) could be detected in 97 of the samples. The associations between levels of these compounds and semen volume, sperm concentration, total sperm count, motility and morphology were assessed. Across countries, sperm concentration, total sperm count and semen volume were not consistently associated with PFOS, PFOA, PFHxS or PFNA levels. The proportion of morphologically normal cells was 35 lower [95 confidence interval (CI): 466) for the third tertile of PFOS exposure as compared with the first. A similar reduction was found in relation to increasing PFHxS levels. At the third PFOA exposure tertile, the percentage of motile spermatozoa was 19 (95 CI: 1 to 39) higher than in the first. The most robust finding in the present study was the negative associations between PFOS exposure and sperm morphology suggesting adverse effects of PFOS on semen quality, possibly due to interference with the endocrine activity or sperm membrane function. It cannot be excluded that this association and the positive association between PFOA and semen motility, which was not consistent across countries, might represent a chance finding due to the multiple statistical tests being performed.
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