Disruption of human plasma cell differentiation by an environmental polycyclic aromatic hydrocarbon: a mechanistic immunotoxicological study

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Abstract
The AhR is a ligand-activated transcription factor that mediates immunosuppression induced by environmental PAH and HAH. Recently, a critical role for the AhR in development of T cells involved in autoimmunity (Th17 and Treg) has been demonstrated, supporting the hypothesis that the AhR plays a key role in immune regulation both in the presence and absence of environmental ligands. Despite these results with T cells systems, little is known of the role that the AhR plays in B cell development. We have demonstrated that B cell activation with CD40 ligand, a stimulus that models adaptive immunity, induces AhR expression in primary human B cells, suggesting that activation may increase human B cell sensitivity to AhR ligands and that the AhR may play a role in B cell development.

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