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Early-Life Cadmium Exposure and Bone-Related Biomarkers: A Longitudinal Study in Children.
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- Author(s): Igra, Annachiara Malin; Vahter, Marie; Raqib, Rubhana; Kippler, Maria
- Source:
Environmental Health Perspectives. Mar2019, Vol. 127 Issue 3, p1-11. 11p. 4 Charts. - Source:
- Additional Information
- Subject Terms: BONE remodeling; AMINO acids; ANTHROPOMETRY; BIOMARKERS; CADMIUM; CONFIDENCE intervals; LONGITUDINAL method; MOTHERS; REGRESSION analysis; SEX distribution; STATISTICS; WOUNDS & injuries; DATA analysis; ENVIRONMENTAL exposure; CHOLECALCIFEROL; OSTEOCALCIN; MANN Whitney U Test; KRUSKAL-Wallis Test; EVALUATION; CHILDREN
- Subject Terms:
- Abstract: BACKGROUND: Chronic cadmium exposure has been associated with osteotoxicity in adults, but little is known concerning its effects on early growth, which has been shown to be impaired by cadmium. OBJECTIVES: Our objective was to assess the impact of early-life cadmium exposure on bone-related biomarkers and anthropometry at 9 y of age. METHODS: For 504 children in a mother-child cohort in Bangladesh, cadmium exposure was assessed by concentrations in urine (U-Cd, long-term exposure) and erythrocytes (Ery-Cd, ongoing exposure) at 9 and 4.5 y of age, and in their mothers during pregnancy. Biomarkers of bone remodeling [urinary deoxypyridinoline (DPD), urinary calcium, plasma parathyroid hormone, osteocalcin, vitamin D3, insulin-like growth factor (IGF) 1, IGF binding protein 3, thyroid stimulating hormone] were measured at 9 y of age. RESULTS: In multivariable-adjusted linear models, a doubling of concurrent U-Cd was associated with a mean increase in osteocalcin of 2:7ng=mL (95% CI: 0.042, 5.9) and in urinary DPD of 22 nmol=L (95% CI: 12, 32). In a combined exposure model, a doubling of maternal Ery-Cd was associated with a mean increase in urinary DPD of 15 nmol =L (95% CI: -0:047, 30). Stratifying the osteocalcin model by gender (pinteraction = 0.001), a doubling of concurrent U-Cd was associated with a mean decrease in osteocalcin of -4:3 ng=mL (95% CI: -8:5, -0:080) in boys and a mean increase of 9:4 ng=mL (95% CI: 5.4, 13) in girls. The same pattern was seen with U-Cd at 4.5 y of age (pinteraction = 0.016). Children's U-Cd and Ery- Cd, concurrent and at 4.5 y of age, were inversely associated with vitamin D3. CONCLUSIONS: Childhood cadmium exposure was associated with several bone-related biomarkers and some of the associations differed by gender. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Environmental Health Perspectives is the property of National Institute of Environmental Health Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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