Abstract
Acute administration of Aroclor-1254 (500 mg/ kg) or 3,4,5,3′,4′,5′-hexabromobiphenyl (HBB) (2–6 mg/ kg) IP, profoundly inhibited the plaque forming response to subsequent challenge with sheep erythrocytes in Ah locus positive (C57B1/6N or B6C3F1N) mice. These studies showed: 1) the immunotoxicity results paralleled enzyme induction results insofar as HBB was approximately 100 times more potent than Aroclor 1254; (2) neither Aroclor nor HBB treatment caused significant induction in the Ah locus negative DBA/2N mice; 3) when B6C3F1 mice were challenged with sheep red blood cells (SRBC) 6 or 16 weeks post Aroclor 1254 treatment, substantial recovery of a PFC response was observed; 4) when these compounds were administered to older (76-week-old) (B6C3F1 mice, severe depression of a PFC response was observed. In contrast to its profound depression of a PFC response, Aroclor-1254 (up to 1250 mg/kg) caused slight increases in lymphocyte proliferation induced by either T or B cell mitogens. A single 500 mg/kg dose of Aroclor-1254 also suppressed the ability of recipient B6C3F1 animals to reject a challenge with either the syngenic fibrosarcoma (PYB6) or the gram negative pathogen (Listeria monocytogenes).
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Lubet, R.A., Lemaire, B.N., Avery, D. et al. Induction of immunotoxicity in mice by polyhalogenated biphenyls. Arch Toxicol 59, 71–77 (1986). https://doi.org/10.1007/BF00286726
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DOI: https://doi.org/10.1007/BF00286726