Human TIM-3 Antibody Summary
Accession # Q8TDQ0.2
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.
Detection of TIM‑3 in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs) were stained with (A) Rat Anti-Human TIM-3 Monoclonal Antibody (Catalog # MAB2365R) or (B) Rat IgG2A isotype control antibody (Catalog # MAB006), followed by Phycoerythrin-conjugated Anti-Rat IgG Secondary Antibody (Catalog # F0105B) and Mouse anti-Human CD14 APC-conjugated Monoclonal Antibody (Catalog # FAB3832A). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
TIM-3 (T cell Immunoglobulin and Mucin domain-3) is a 60 kDa member of the TIM family of immune regulating molecules. TIMs are type I transmembrane glycoproteins with one Ig-like V-type domain and a Ser/Thr-rich mucin stalk (1-3). Mature human TIM-3 consists of a 181 amino acid (aa) extracellular domain (ECD), a 21 aa transmembrane segment, and a 78 aa cytoplasmic tail (4). An alternately spliced isoform is truncated following a short substitution after the Ig-like domain. Within the ECD, human TIM-3 shares 58% aa sequence identity with mouse and rat TIM-3. TIM-3 is expressed on the surface of effector T cells (CD4+ Th1 and CD8+ Tc1) but not on helper T cells (CD4+ Th2 and CD8+ Tc2) (4, 5). In chronic inflammation, autoimmune disorders, and some cancers, TIM-3 is upregulated on several other hematopoietic cell types. The Ig domain of TIM-3 interacts with a ligand on resting but not activated Th1 and Th2 cells (5, 6). The glycosylated Ig domain of TIM-3 binds cell-associated galectin-9. This induces TIM-3 Tyr phosphorylation and proapoptotic signaling (7). TIM-3 functions as a negative regulator of Th1 cell activity. Its blockade results in increased IFN-gamma production, Th1 cell proliferation and cytotoxicity (5, 6, 8), regulatory T cell development (5), and increases in macrophage and neutrophil infiltration into sites of inflammation (9).
- Anderson, A.C. and D.E. Anderson (2006) Curr. Opin. Immunol. 18:665.
- Mariat, C. et al. (2005) Phil. Trans. R. Soc. B 360:1681.
- Meyers, J.H. et al. (2005) Trends Mol. Med. 11:362.
- Monney, L. et al. (2002) Nature 415:536.
- Sanchez-Fueyo, A. et al. (2003) Nat. Immunol. 4:1093.
- Sabatos, C.A. et al. (2003) Nat. Immunol. 4:1102.
- Zhu, C. et al. (2005) Nat. Immunol. 6:1245.
- Koguchi, K. et al. (2006) J. Exp. Med. 203:1413.
- Frisancho-Kiss, S. et al. (2006) J. Immunol. 176:6411.
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