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Assessing the feasibility of using toenails as biomarkers for estimating inorganic arsenic exposure in Japanese adults.
Environ Health Prev Med
November 2024
Health and Environmental Risk Division, National Institute for Environmental Studies.
Background: Long-term exposure to inorganic arsenic (InAs) through arsenic (As)-contaminated drinking water poses serious health risks. However, epidemiological studies focusing on low-level dietary exposure to InAs are lacking. Furthermore, although toenail clippings are used as biomarkers for assessing As exposure in areas with contaminated drinking water, to date, no method has been developed for using toenails as a biomarker of long-term InAs exposure in individuals with lower exposure levels, e.
View Article and Find Full Text PDFParental arsenic exposure and tissue-specific DNA methylation in Bangladeshi infants with spina bifida.
Epigenetics
December 2024
Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
Article Synopsis
- The study explores how arsenic exposure in parents, particularly fathers, may affect DNA methylation in infants with spina bifida, suggesting a link between environmental toxins and genetic changes.
- Researchers analyzed arsenic levels in fathers' toenails and measured DNA methylation in various tissues from infants, finding a significant association in dural tissue.
- The findings highlight the relevance of these epigenetic changes, particularly in pathways related to neural development, and underscore the need for further research on paternal exposure to toxins.
Factors influencing metal concentrations in hair and nails during longitudinal follow-up of apprentice welders.
J Toxicol Environ Health A
December 2024
Department of Environmental and Occupational Health, Chair in Toxicological Risk Assessment and Management, and Public Health Research Center (CReSP), University of Montreal, Montreal, Canada.
The aim of this study was to determine factors influencing observed increased metal biomarkers of exposure levels in a group of 116 Quebec apprentice welders during a longitudinal follow-up of exposure. Analysis of 14 metals was carried out in hair, fingernail, and toenail samples taken from participants over the course of their welding curriculum at 6 different times. Personal and socio-demographic characteristics, lifestyle habits, and other potential confounding factors were documented by questionnaire.
View Article and Find Full Text PDFTrace Element Concentrations of Arsenic and Selenium in Toenails and Risk of Prostate Cancer among Pesticide Applicators.
Curr Oncol
September 2024
Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA.
Prostate cancer is a common cancer among males in the US, but little is known about its risk factors, including trace elements. The primary aim of this study was to examine prostate cancer and its association with arsenic and selenium in toenails. We conducted a small, nested case-control study of men residing in Iowa within the Agricultural Health Study cohort, where we also collected toenail samples to test for arsenic and other trace elements.
View Article and Find Full Text PDFArsenical keratosis in China: A case report and review of the literature.
Skin Res Technol
September 2024
Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, NMPA Key Laboratory for Quality Control and Evaluation of Cosmetics, Beijing, China.
Article Synopsis
- Arsenical keratosis is a skin condition linked to long-term arsenic exposure, primarily through non-compliant use of arsenic in traditional Chinese medicine for psoriasis treatment.
- A review of 64 studies over 32 years revealed that 92.21% of arsenic cases were iatrogenic, with most patients displaying hyperkeratotic lesions and more than half developing skin tumors.
- Treatment outcomes were generally positive, with a significant improvement in skin lesions for patients treated with Acitretin Capsules, although one patient succumbed to metastatic squamous cell carcinoma.
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