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Exposure to polychlorinated compounds and cryptorchidism; A nested case-control study

Axelsson, Jonatan LU ; Scott, Kristin LU ; Dillner, Joakim LU ; Lindh, Christian H. LU orcid ; Zhang, He LU ; Rylander, Lars LU orcid and Rignell-Hydbom, Anna LU (2020) In PLoS ONE 15(7).
Abstract

BACKGROUND: Maldescended testes or cryptorchidism is a genital birth defect that affects 2-9% of all male new-borns. Over the last 40 years there have been reports of increased prevalence in countries like the US, the UK and the Scandinavian countries. This possible increase has in some studies been linked to a foetal exposure to chemical pollutants. In this matched case-control study, we analysed maternal serum samples in early pregnancy for three different organochlorine compounds, to investigate whether the levels were associated with the risk of cryptorchidism. METHOD: Maternal serum samples taken during the first trimester of pregnancy from 165 cases (boys born with cryptorchidism) and 165 controls, matched for birth year and... (More)

BACKGROUND: Maldescended testes or cryptorchidism is a genital birth defect that affects 2-9% of all male new-borns. Over the last 40 years there have been reports of increased prevalence in countries like the US, the UK and the Scandinavian countries. This possible increase has in some studies been linked to a foetal exposure to chemical pollutants. In this matched case-control study, we analysed maternal serum samples in early pregnancy for three different organochlorine compounds, to investigate whether the levels were associated with the risk of cryptorchidism. METHOD: Maternal serum samples taken during the first trimester of pregnancy from 165 cases (boys born with cryptorchidism) and 165 controls, matched for birth year and maternal age, parity and smoking habits during the pregnancy, were retrieved from the Southern Sweden Maternity Biobank. The samples were analysed for 2,2',4,4',5,5'-hexachlorobiphenyl (PCB-153), dichlorodiphenyltrichloroethane (p,p'-DDE) and hexachlorobenzene (HCB), using gas chromatography mass spectrometry. Associations between exposure and cryptorchidism were evaluated by conditional logistic regression. RESULTS: We found no statistically significantly associations between exposure to these compounds and cryptorchidism, either when the exposure variables were used as a continuous variable, or when the exposure levels were divided in quartiles. CONCLUSION: We found no evidence of an association between maternal levels of PCB-153, p,p'-DDE or HCB during the pregnancy and the risk of having cryptorchidism in the sons.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
PLoS ONE
volume
15
issue
7
article number
e0236394
publisher
Public Library of Science (PLoS)
external identifiers
  • scopus:85088539762
  • pmid:32702712
ISSN
1932-6203
DOI
10.1371/journal.pone.0236394
language
English
LU publication?
yes
id
63140461-3b68-4214-b6dd-3eb5b6489eeb
date added to LUP
2020-08-05 10:34:50
date last changed
2024-04-03 11:26:30
@article{63140461-3b68-4214-b6dd-3eb5b6489eeb,
  abstract     = {{<p>BACKGROUND: Maldescended testes or cryptorchidism is a genital birth defect that affects 2-9% of all male new-borns. Over the last 40 years there have been reports of increased prevalence in countries like the US, the UK and the Scandinavian countries. This possible increase has in some studies been linked to a foetal exposure to chemical pollutants. In this matched case-control study, we analysed maternal serum samples in early pregnancy for three different organochlorine compounds, to investigate whether the levels were associated with the risk of cryptorchidism. METHOD: Maternal serum samples taken during the first trimester of pregnancy from 165 cases (boys born with cryptorchidism) and 165 controls, matched for birth year and maternal age, parity and smoking habits during the pregnancy, were retrieved from the Southern Sweden Maternity Biobank. The samples were analysed for 2,2',4,4',5,5'-hexachlorobiphenyl (PCB-153), dichlorodiphenyltrichloroethane (p,p'-DDE) and hexachlorobenzene (HCB), using gas chromatography mass spectrometry. Associations between exposure and cryptorchidism were evaluated by conditional logistic regression. RESULTS: We found no statistically significantly associations between exposure to these compounds and cryptorchidism, either when the exposure variables were used as a continuous variable, or when the exposure levels were divided in quartiles. CONCLUSION: We found no evidence of an association between maternal levels of PCB-153, p,p'-DDE or HCB during the pregnancy and the risk of having cryptorchidism in the sons.</p>}},
  author       = {{Axelsson, Jonatan and Scott, Kristin and Dillner, Joakim and Lindh, Christian H. and Zhang, He and Rylander, Lars and Rignell-Hydbom, Anna}},
  issn         = {{1932-6203}},
  language     = {{eng}},
  number       = {{7}},
  publisher    = {{Public Library of Science (PLoS)}},
  series       = {{PLoS ONE}},
  title        = {{Exposure to polychlorinated compounds and cryptorchidism; A nested case-control study}},
  url          = {{http://dx.doi.org/10.1371/journal.pone.0236394}},
  doi          = {{10.1371/journal.pone.0236394}},
  volume       = {{15}},
  year         = {{2020}},
}