FlowMAb PE anti-human CD3
Product Details
The OKT-3 monoclonal antibody reacts with human CD3Īµ, a 20 kDa transmembrane cell-surface protein that belongs to the immunoglobulin superfamily. CD3Īµ is one of five polypeptide chains that combine to form the TCR complex. CD3Īµ is expressed on T lymphocytes, NK-T cells, and, to varying degrees, on developing thymocytes. CD3 plays roles in TCR signaling, T lymphocyte activation, and antigen recognition. The OKT3 antibody clone can block the binding of clones SK7 and UCHT1. This R-phycoerythrin (R-PE or PE)-conjugated version of the OKT-3 antibody is useful for flow cytometry.Specifications
| Isotype | Mouse IgG2a,Ā Īŗ |
|---|---|
| Recommended Isotype Control(s) | FlowMAb PE mouse IgG2a isotype control, unknown specificity |
| Conjugation | PE |
| Excitation Source | Yellow-Green 488 nm, 532 nm, 561 nm |
| Excitation Max | 496 nm, 566 nm |
| Emission Max | 576 nm |
| Immunogen | Not available or unknown |
| Reported Applications | Flow cytometry |
| Formulation |
PBS, pH 7.0 Contains 0.09% Sodium Azide |
| Production | Purified from cell culture supernatant in an animal-free facility |
| Purification | Protein G. Conjugated with R-phycoerythrin under optimal conditions. |
| Storage | The antibody solution should be stored at the stock concentration at 4Ā°C and protected from prolonged exposure to light. Do not freeze. |
Additional Formats
Recommended Products
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Recommended Isotype Control(s)
FlowMAb PE mouse IgG2a isotype control, unknown specificity
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Recommended Dilution Buffer
InVivoPure pH 7.0 Dilution Buffer
Flow Cytometry
Willing, A., et al. (2014). "CD8(+) MAIT cells infiltrate into the CNS and alterations in their blood frequencies correlate with IL-18 serum levels in multiple sclerosis" Eur J Immunol 44(10): 3119-3128. PubMed
Recent findings indicate a pathogenic involvement of IL-17-producing CD8(+) T cells in multiple sclerosis (MS). IL-17 production has been attributed to a subset of CD8(+) T cells that belong to the mucosal-associated invariant T (MAIT) cell population. Here, we report a reduction of CD8(+) MAIT cells in the blood of MS patients compared with healthy individuals, which significantly correlated with IL-18 serum levels in MS patients. In vitro stimulation of peripheral blood mononuclear cells from healthy individuals and MS patients with IL-18 specifically activated CD8(+) MAIT cells. Moreover, IL-18 together with T-cell receptor stimulation induced, specifically on CD8(+) MAIT cells, an upregulation of the integrin very late antigen-4 that is essential for the infiltration of CD8(+) T cells into the CNS. Notably, we were able to identify CD8(+) MAIT cells in MS brain lesions by immunohistochemistry while they were almost absent in the cerebrospinal fluid (CSF). In summary, our findings indicate that an IL-18-driven activation of CD8(+) MAIT cells contributes to their CNS infiltration in MS, in turn leading to reduced CD8(+) MAIT-cell frequencies in the blood. Therefore, CD8(+) MAIT cells seem to play a role in the innate arm of immunopathology in MS.