Abstract:
:This study examined the associations between concentrations of cobalt (Co), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), and zinc (Zn) in placental tissue and risks for NTDs with a case-control design consisting of 408 fetuses or newborns with neural tube defects (NTDs) and 593 non-malformed fetuses or newborns. The concentrations of Zn and Fe were determined by inductively coupled plasma-emission spectrometer and the other four elements by inductively coupled plasma-mass spectrometer. Element concentrations were presented in ng/g or µg/g dry weight of placental tissue. The associations between the levels of each of the six ETEs and risk for NTDs were evaluated using multivariable logistic regression, and the associations between overall levels of all six ETEs and risk for NTDs were examined using Bayesian kernel machine regression (BKMR). Concentrations above the median concentration of all participants for an individual element were associated with increased risk for NTDs: Mn, 3.17-fold (95% CI 2.35-4.28); Mo, 3.73-fold (95% CI 2.74-5.07); Se, 3.28-fold (95% CI 2.44-4.42); and Zn, 2.85-fold (95% CI 2.13-3.83), and a decreased risk for Co [OR, 0.18 (95% CI 0.14-0.25)]. The risk for NTDs increased with the increase in the concentrations of Mn, Mo, Se, and Zn, but decreased for Co, in the second, third, and fourth quartiles, respectively, compared to their lowest quartile (all Pstrend < 0.01). In BKMR model, the risk for NTDs increased constantly when the overall exposure levels were higher than the median of the six ETEs as a co-exposure mixture, and the associations between Co, Mn, Se, and Zn and NTD risk remained when the remaining five elements were taken into consideration simultaneously. Taken together, when evaluated individually, higher levels of Mn, Se, and Zn in placental tissue are associated with increased risk for NTDs, while higher levels of Co are associated with decreased risk for NTDs; when examined collectively, the risk of NTDs increases continuously when exposure levels are higher than the median of the six ETE mixture.
journal_name
Environ Intjournal_title
Environment internationalauthors
Yin S,Wang C,Wei J,Wang D,Jin L,Liu J,Wang L,Li Z,Ren A,Yin Cdoi
10.1016/j.envint.2020.105688subject
Has Abstractpub_date
2020-06-01 00:00:00pages
105688eissn
0160-4120issn
1873-6750pii
S0160-4120(19)34044-9journal_volume
139pub_type
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