Human Indoleamine 2,3-dioxygenase/IDO Alexa Fluor® 647-conjugated Antibody Summary
Accession # P14902
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
R&D Systems Antibodies
Preparation and Storage
Background: Indoleamine 2,3-dioxygenase/IDO
Indoleamine 2,3-dioxygenase (IDO) is a heme-containing intracellular dioxygenase catalyzing the degradation of the essential amino acid L-tryptophan to N-formyl-kynurenine (1). This degradation is the first and rate-limiting step of the L-kynurenine pathway (2). IDO is widely expressed in dendritic cells, macrophages, microglia, eosinophils, fibroblasts, endothelial cells, and most tumor cells. In immune cells, its expression is mainly induced by cytokines such as IFN-gamma, IFN-alpha, IFN-beta, and IL‑10. IDO has an antimicrobial function due to its decreasing the availability of the essential amino acid tryptophan in inflammatory environments (3). Recent studies have demonstrated that IDO induces immunosuppression during infection, pregnancy, transplantation, autoimmunity, and neoplasia (3-5).
- Lewis-Ballester, A. et al. (2009) Proc. Natl. Acad. Sci. USA. 106:17371.
- Costantino, G. (2009) Expert Opin. Ther. Targets 13:247.
- Xu, H. et al. (2008) Immunol. Lett. 121:1.
- Lob, S. et al. (2009) Nat. Rev. Cancer 9:445.
- Curti, A. et al. (2009) Blood 113:2394.
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