Abstract
Benzo[a]pyrene (B[a]P) is a polycyclic aromatic hydrocarbon contaminant that is widely present in environmental sources, including food. This study aims to clarify the effects of B[a]P toxicity on activated mouse T cells in vitro. Our results show that B[a]P markedly inhibited Concanavalin A (ConA)-induced T lymphocyte proliferation and suppressed the production of the cytokines Interferon (IFN)-γ, Interleukin (IL)-2 and IL-4. Western blot and protein-DNA interaction assays were used to study how B[a]P affects signal transduction. The results revealed that B[a]P suppressed the ConA-induced activation of the Ca2+/CaM/NFκB and Ca2+/CaM/CaN/NFAT signal transduction pathways. These observations indicate that B[a]P has toxic effects on activated mouse T cells in vitro.
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