Decoy receptor 3 (Dcr3), also known as tumor necrosis factor receptor superfamily member 6B (TNFRSF6B), TR6 and M68, is a soluble protein of the tumor necrosis factor receptor superfamily which inhibits Fas ligand-induced apoptosis.[1][2][3]
Dcr3 was identified in 1998 by the search of genes with homology to the TNFR gene superfamily in expressed sequence tag (EST) database.
Structure
The open reading frame of TNFRSF6B encodes 300 amino acids with a 29-residue signal sequence and four tandem cystein-rich repeats. Two transcript variants encoding the same isoform, but differing in the 5' UTR, have been observed for this gene.[3] Unlike most of the other members of TNFR superfamily, TNFRSF6 is a soluble protein which contains no transmembrane domain.
Function
This gene belongs to the tumor necrosis factor receptor superfamily. It acts as a decoy receptor that competes with death receptors for ligand binding. The encoded protein is postulated to play a regulatory role in suppressing FasL- and LIGHT-mediated cell death and T cell activation as well as to induce angiogenesis via neutralization of TL1A. Overexpression of this gene has been noted in various tumors e.g. gastrointestinal tract tumors, and it is located in a gene-rich cluster on chromosome 20, with other potentially tumor-related genes.[3]
↑ 1.01.1Pitti RM, Marsters SA, Lawrence DA, Roy M, Kischkel FC, Dowd P, Huang A, Donahue CJ, Sherwood SW, Baldwin DT, Godowski PJ, Wood WI, Gurney AL, Hillan KJ, Cohen RL, Goddard AD, Botstein D, Ashkenazi A (Jan 1999). "Genomic amplification of a decoy receptor for Fas ligand in lung and colon cancer". Nature. 396 (6712): 699–703. doi:10.1038/25387. PMID9872321.
↑ 2.02.12.2Yu KY, Kwon B, Ni J, Zhai Y, Ebner R, Kwon BS (Jun 1999). "A newly identified member of tumor necrosis factor receptor superfamily (TR6) suppresses LIGHT-mediated apoptosis". J Biol Chem. 274 (20): 13733–6. doi:10.1074/jbc.274.20.13733. PMID10318773.
↑ 5.05.1Hsu TL, Chang YC, Chen SJ, Liu YJ, Chiu AW, Chio CC, Chen L, Hsieh SL (May 2002). "Modulation of dendritic cell differentiation and maturation by decoy receptor 3". J. Immunol. 168 (10): 4846–53. doi:10.4049/jimmunol.168.10.4846. PMID11994433.
Further reading
Kikuno R, Nagase T, Ishikawa K, et al. (1999). "Prediction of the coding sequences of unidentified human genes. XIV. The complete sequences of 100 new cDNA clones from brain which code for large proteins in vitro". DNA Res. 6 (3): 197–205. doi:10.1093/dnares/6.3.197. PMID10470851.
Deloukas P, Matthews LH, Ashurst J, et al. (2002). "The DNA sequence and comparative analysis of human chromosome 20". Nature. 414 (6866): 865–71. doi:10.1038/414865a. PMID11780052.
Migone TS, Zhang J, Luo X, et al. (2002). "TL1A is a TNF-like ligand for DR3 and TR6/DcR3 and functions as a T cell costimulator". Immunity. 16 (3): 479–92. doi:10.1016/S1074-7613(02)00283-2. PMID11911831.
Hsu TL, Chang YC, Chen SJ, et al. (2002). "Modulation of dendritic cell differentiation and maturation by decoy receptor 3". J. Immunol. 168 (10): 4846–53. doi:10.4049/jimmunol.168.10.4846. PMID11994433.
Mild G, Bachmann F, Boulay JL, et al. (2002). "DCR3 locus is a predictive marker for 5-fluorouracil-based adjuvant chemotherapy in colorectal cancer". Int. J. Cancer. 102 (3): 254–7. doi:10.1002/ijc.10711. PMID12397645.
Wan X, Zhang J, Luo H, et al. (2003). "A TNF family member LIGHT transduces costimulatory signals into human T cells". J. Immunol. 169 (12): 6813–21. doi:10.4049/jimmunol.169.12.6813. PMID12471113.
Wan X, Shi G, Semenuk M, et al. (2003). "DcR3/TR6 modulates immune cell interactions". J. Cell. Biochem. 89 (3): 603–12. doi:10.1002/jcb.10523. PMID12761893.
Tsuji S, Hosotani R, Yonehara S, et al. (2003). "Endogenous decoy receptor 3 blocks the growth inhibition signals mediated by Fas ligand in human pancreatic adenocarcinoma". Int. J. Cancer. 106 (1): 17–25. doi:10.1002/ijc.11170. PMID12794752.
Shi G, Wu Y, Zhang J, Wu J (2004). "Death decoy receptor TR6/DcR3 inhibits T cell chemotaxis in vitro and in vivo". J. Immunol. 171 (7): 3407–14. doi:10.4049/jimmunol.171.7.3407. PMID14500635.
Wu SF, Liu TM, Lin YC, et al. (2004). "Immunomodulatory effect of decoy receptor 3 on the differentiation and function of bone marrow-derived dendritic cells in nonobese diabetic mice: from regulatory mechanism to clinical implication". J. Leukoc. Biol. 75 (2): 293–306. doi:10.1189/jlb.0303119. PMID14634066.
Chang YC, Hsu TL, Lin HH, et al. (2004). "Modulation of macrophage differentiation and activation by decoy receptor 3". J. Leukoc. Biol. 75 (3): 486–94. doi:10.1189/jlb.0903448. PMID14657214.