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Arsenic speciation in hair and nails of acute promyelocytic leukemia (APL) patients undergoing arsenic trioxide treatment.
Talanta 2018 July 2
Arsenic in hair and nails has been used to assess chronic exposure of humans to environmental arsenic. However, it remains to be seen whether it is appropriate to evaluate acute exposure to sub-lethal doses of arsenic typically used in therapeutics. In this study, hair, fingernail and toenail samples were collected from nine acute promyelocytic leukemia (APL) patients who were administered intravenously the daily dose of 10 mg arsenic trioxide (7.5 mg arsenic) for up to 54 days. These hair and nail samples were analyzed for arsenic species using high performance liquid chromatography separation and inductively coupled plasma mass spectrometry detection (HPLC-ICPMS). Inorganic arsenite was the predominant form among water-extractable arsenicals. Dimethylarsinic acid (DMAV ), monomethylarsonic acid (MMAV ), monomethylarsonous acid (MMAIII ), monomethylmonothioarsonic acid (MMMTAV ), and dimethylmonothioarsinic acid (DMMTAV ) were also detected in both hair and nail samples. This is the first report of the detection of MMAIII and MMMTAV as metabolites of arsenic in hair and nails of APL patients.
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