PMID: 2499955Jun 1, 1989Paper

Evaluation of the immunotoxicity of low level PCB exposure in the rat

Toxicology
R J SmialowiczC B Copeland

Abstract

Weanling male Fischer 344 rats were exposed daily by gastric intubation for up to 15 weeks to the polychlorinated biphenyl (PCB) Aroclor 1254 at 0.1, 1, 10, or 25 mg/kg body weight. At 5, 10 and 15 weeks groups of rats were killed and immune functions were evaluated. The immune parameters examined included the following: body and lymphoid organ weights, mitogen-stimulated lymphoproliferative (LP) responses, natural killer (NK) cell activity, mixed lymphocyte reaction (MLR), and cytotoxic T lymphocyte (CTL) response. After 15 weeks of dosing body weights were reduced in rats receiving 25 mg/kg PCB while thymus weights were decreased in rats receiving 10 and 25 mg/kg. NK cell activity was reduced in rats dosed for 15 weeks at 10 and 25 mg/kg. The LP response to phytohemagglutinin was enhanced in rats dosed for 15 weeks at 25 mg/kg PCB. Exposure of rats to PCB did not affect the MLR or CTL responses. Other groups of rats were exposed to cyclophosphamide (CY) and served as positive controls for the immune assays employed. CY induced alterations in all of the immune parameters measured, indicating that this is an appropriate battery of immune function tests which is capable of detecting immune alterations in the rat. Alterations in ...Continue Reading

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Citations

Jan 1, 1994·International Archives of Occupational and Environmental Health·B G SvenssonL Hagmar
Jan 11, 1991·International Journal of Immunopharmacology·H TryphonasD L Arnold
Sep 25, 1999·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·H TryphonasR Mehta
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