Methylation of inorganic arsenic by murine fetal tissue explants

Derrick Broka, Eric Ditzel, Stephanie Quach, Todd D. Camenisch

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Although it is generally believed that the developing fetus is principally exposed to inorganic arsenic and the methylated metabolites from the maternal metabolism of arsenic, little is known about whether the developing embryo can autonomously metabolize arsenic. This study investigates inorganic arsenic methylation by murine embryonic organ cultures of the heart, lung, and liver. mRNA for AS3mt, the gene responsible for methylation of arsenic, was detected in all embryonic tissue types studied. In addition, methylated arsenic metabolites were generated by all three tissue types. The fetal liver explants yielded the most methylated arsenic metabolites (∼7% of total arsenic/48 h incubation) while the heart, and lung preparations produced slightly greater than 2% methylated metabolites. With all tissues the methylation proceeded mostly to the dimethylated arsenic species. This has profound implications for understanding arsenic-induced fetal toxicity, particularly if the methylated metabolites are produced autonomously by embryonic tissues.

Original languageEnglish (US)
Pages (from-to)279-283
Number of pages5
JournalDrug and Chemical Toxicology
Volume39
Issue number3
DOIs
StatePublished - Jul 2 2016

Keywords

  • Arsenicals
  • development
  • metabolism

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis
  • Chemical Health and Safety

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