Abstract
Exposure to glycol ethers has been associated with adverse effects in laboratory animals including thymus atrophy and mild leukopenia. These effects may involve depletion of immunoresponsive cells. This study examined possible alterations in immune function and host resistance of B6C3F1 mice following exposure to ethylene glycol monomethyl ether (EGME) or its principal metabolite, methoxyacetic acid (MOAA). EGME and MOAA were administered by gavage to mice in 10 doses over a 2-week period at total dosages of 250, 500, and 1000 μg/g of body weight. Following exposure, immunopathology, humoral immunity, cell-mediated immunity, macrophage function, and host resistance to Listeria monocytogenes bacterial challenge were examined. A 48% reduction in thymus weight was observed at the intermediate and high doses of both chemicals. No significant alterations in immune function or host resistance to L. monocytogenes were observed in animals exposed to either EGME or MOAA.
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