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IDO Antibody

IDO Antibody #12006

This product is discontinued

We recommend the following alternatives

  • WB
  • IP
  • IHC
  • IF
  • F

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.

IDO Antibody recognizes endogenous levels of total IDO protein.

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human IDO protein. Antibodies are purified by protein A and peptide affinity chromatography.

INDO/IDO1/indoleamine 2,3-dioxygenase (IDO) is an IFN-γ-inducible enzyme that catalyzes the rate-limiting step of tryptophan degradation (1). IDO is upregulated in many tumors and in dendritic cells in tumor-draining lymph nodes. Elevated tryptophan catabolism in these cells leads to tryptophan starvation of T cells, limiting T cell proliferation and activation (2). Therefore, IDO is considered an immunosuppresive molecule, and research studies have shown that upregulation of IDO is a mechanism of cancer immune evasion (3). The gastrointestinal stromal tumor drug, imatinib, was found to act, in part, by reducing IDO expression, resulting in increased CD8+ T cell activation and induction of apoptosis in regulatory T cells (4). In addition to its enzymatic activity, IDO was recently shown to have signaling capability through an immunoreceptor tyrosine-based inhibitory motif (ITIM) that is phosphorylated by Fyn in response to TGF-β. This leads to recruitment of SHP-1 and activation of the noncanonical NF-κB pathway (5).

  1. Yasui, H. et al. (1986) Proc Natl Acad Sci U S A 83, 6622-6.
  2. Mellor, A.L. et al. (2003) Adv Exp Med Biol 527, 27-35.
  3. Prendergast, G.C. (2008) Oncogene 27, 3889-900.
  4. Balachandran, V.P. et al. (2011) Nat Med 17, 1094-100.
  5. Pallotta, M.T. et al. (2011) Nat Immunol 12, 870-8.
Entrez-Gene Id
Swiss-Prot Acc.
For Research Use Only. Not For Use In Diagnostic Procedures.

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