Abstract:
:The induction and maintenance of immunologic tolerance at the feto-maternal interface is necessary for a successful pregnancy. The most accepted hypothesis for the mechanism underlying this tolerance is that pregnancy-induced foetal antigen-specific maternal T regulatory (T(reg) ) cells mediate maternal tolerance to the foetus. The aryl hydrocarbon receptor (AhR), which is highly expressed in the placenta, is widely studied in female reproductive biology and immunology. Activation of AhR can promote immune tolerance by controlling the differentiation of T(reg) cells in some autoimmune disorders. However, the specific mechanisms underlying tolerance are poorly understood. Indoleamine 2,3-dioxygenase (IDO) is the initial and rate-limiting enzyme of tryptophan catabolism in human placental trophoblasts. IDO produces kynurenine, an endogenous AhR ligand that directly activates AhR and is proposed to be central to the establishment and maintenance of immunologic tolerance at the maternal-foetal interface. We propose that kynurenine activates AhR, leading to the AhR-dependent T(reg) cells generation, which in turn critically regulates immunological tolerance at the feto-maternal interface. This hypothesis must be tested and the proof of this hypothesis may provide a potential therapeutic target for the treatment of infertility and other adverse pregnancy outcomes resulted from inadequate immunological tolerance at the feto-maternal interface.
journal_name
Cell Biol Intjournal_title
Cell biology internationalauthors
Hao K,Zhou Q,Chen W,Jia W,Zheng J,Kang J,Wang K,Duan Tdoi
10.1002/cbin.10023subject
Has Abstractpub_date
2013-02-01 00:00:00pages
105-8issue
2eissn
1065-6995issn
1095-8355journal_volume
37pub_type
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