The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that is an important regulator of immune responses in various disease models. In the non-obese diabetic (NOD) mouse model of type 1 diabetes, activation of this receptor leads to suppression of the autoimmune response and limits immune cell infiltration of...
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a potent immunosuppressant, and suppresses many disease models including graft-versus-host (GVH), experimental autoimmune encephalomyelitis (EAE) and a model of type 1 diabetes in non-obese diabetic (NOD) mice (1-3). In this study, we show that the inflammation of the pancreas due to insulitis is not a systemic autoimmune...
The immune toxicity of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) has been studied for over 35 years, but only recently has the profound immune suppression associated with TCDD exposure been linked to induction of regulatory T cells (Tregs). The effects of TCDD are mediated through binding the aryl hydrocarbon receptor (AhR), a ligand-activated transcription...
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Nancy I. Kerkvliet
The immune toxicity of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) has
The aryl hydrocarbon receptor (AhR) has recently been described as a novel therapeutic target, given the potent suppression of multiple immune-mediated diseases following activation by the prototypic ligand, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). In the parent-into-F1 graft-versus-host (GVH) model, suppression of the cytotoxic T-lymphocyte (CTL) response is associated with the presence of CD25⁺CTLA-4⁺IL-10⁺Foxp3[superscript...
In vivo generation of cytotoxic T cell activity
against alloantigen is suppressed by the aromatic
hydrocarbon (Ah) receptor binding 3,3',4,4',5,5'-
hexachlorobiphenyl isomer (HxCB). Previous studies in
this laboratory suggest that HxCB may alter early
event(s) in the activation of cytotoxic T lymphocytes
(CTL). Production of and response to interleukins 1...
Monocrotaline (MCT) is a member of a class of naturally occurring
phytotoxins known as pyrrolizidine alkaloids (PAs). Exposure to PAs can result
in liver and cardiopulmonary lesions as well as lymphoid organ atrophy. In the
present study C57BI/6 (B6) mice received MCT (0-150 mg/kg/day, po) for 14
days. Overt toxicity...