Evaluating the effects of immunotoxicants using carbon fiber microelectrode amperometry

Bryce J. Marquis, Christy L. Haynes

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5 Scopus citations


Carbon fiber microelectrode amperometry (CFMA) is explored as a technique for studying the effects of immunotoxicants on single-cell in vitro exocytosis function in a mouse peritoneal mast cell (MPMC)/fibroblast co-culture model. MPMCs were acutely exposed to between 10 and 100 μM of the immunotoxicants mono-2-ethylhexyl phthalate (MEHP) and bisphenol A (BPA), and release of serotonin was evaluated by CFMA. A significant decrease in the quantal content of serotonin was measured for all levels of exposure to both MEHP and BPA. The overall efficiency of the exocytotic function of MPMCs was found to be impaired by all exposure concentrations of BPA, but this efficiency was only impaired at the lowest exposure concentration of MEHP. This study illustrates the potential of CFMA as a technique for determining quantitative and biophysical chemical information in in vitro immunotoxicological studies. [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)2979-2985
Number of pages7
JournalAnalytical and Bioanalytical Chemistry
Issue number7-8
StatePublished - Dec 1 2010


  • Bioanalytical methods
  • Cell systems
  • Electroanalytical methods
  • Endocrine disruptors
  • Exocytosis microelecrtodes
  • Pesticides
  • Single-cell analysis

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