Prevention of T cell-driven complement activation and inflammation by tryptophan catabolism during pregnancy

Andrew L. Mellor, Jayabalan Sivakumar, Phillip Chandler, Kimberly Smith, Hector Molina, Dailing Mao, David H. Munn

Research output: Contribution to journalArticle

351 Citations (Scopus)

Abstract

Indoleamine 2,3 dioxygenase (IDO) activity during pregnancy protects developing fetuses from maternal immune responses in CBA mice. We show here that fetal allografts were rejected only in mating combinations where paternally inherited tissue antigens elicited potent maternal T cell responses after exposure to IDO inhibitor. IDO inhibitor treatment triggered extensive inflammation at the maternal-fetal interface in susceptible mating combinations, which was characterized by complement deposition and hemorrhagic necrosis. Identical inflammatory responses occurred in B cell-deficient (RAG-1-/-) mothers that carried a monoclonal cohort of CD8+T cells specific for a single paternally inherited fetal major histocompatibility complex antigen. Thus, fetal allograft rejection was accompanied by a unique form of inflammation that was characterized by T cell-dependent, antibody-independent activation of complement. In contrast, no inflammation, complement deposition or T cell infiltration was elicited when mice carrying syngeneic fetuses were exposed to IDO inhibitor. These data show that IDO activity protects the fetus by suppressing T cell-driven local inflammatory responses to fetal alloantigens.

Original languageEnglish (US)
Pages (from-to)64-68
Number of pages5
JournalNature Immunology
Volume2
Issue number1
DOIs
StatePublished - Jan 1 2001

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Indoleamine-Pyrrole 2,3,-Dioxygenase
Complement Activation
Tryptophan
Inflammation
T-Lymphocytes
Pregnancy
Fetus
Mothers
Allografts
Inbred CBA Mouse
Histocompatibility Antigens
Isoantigens
Major Histocompatibility Complex
B-Lymphocytes
Necrosis
Antigens
Antibodies

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

Prevention of T cell-driven complement activation and inflammation by tryptophan catabolism during pregnancy. / Mellor, Andrew L.; Sivakumar, Jayabalan; Chandler, Phillip; Smith, Kimberly; Molina, Hector; Mao, Dailing; Munn, David H.

In: Nature Immunology, Vol. 2, No. 1, 01.01.2001, p. 64-68.

Research output: Contribution to journalArticle

Mellor, Andrew L. ; Sivakumar, Jayabalan ; Chandler, Phillip ; Smith, Kimberly ; Molina, Hector ; Mao, Dailing ; Munn, David H. / Prevention of T cell-driven complement activation and inflammation by tryptophan catabolism during pregnancy. In: Nature Immunology. 2001 ; Vol. 2, No. 1. pp. 64-68.
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