Immunocytochemistry/ Immunofluorescence: CD8 Antibody (53-6.7) [NBP1-49045] - CD8 alpha Antibody (53-6.7) [NBP1-49045] - Analysis of immersion fixed splenocytes. Primary antibody was used at a dilution of 10 ug/mL and ...read more
Immunohistochemistry: CD8 Antibody (53-6.7) [NBP1-49045] - Histopathological analysis of spinal cord in EAE mice. Representative spinal cord sections from wild-type (WT), Asic1-/-, and Asic2-/- mice at 45 days after ...read more
Immunohistochemistry-Frozen: CD8 Antibody (53-6.7) [NBP1-49045] - CD8 alpha Antibody (53-6.7) [NBP1-49045] - Analysis of mosue spleen sections. CD8+ lymphocytes are marked by brown labeling of the cell surface.
Immunohistochemistry-Frozen: CD8 Antibody (53-6.7) [NBP1-49045] - Analysis of CD8+ T cells in allogeneic skin grafted onto a mouse.
Flow Cytometry: CD8 Antibody (53-6.7) [NBP1-49045] - Analysis of fixed murine splenocytes by multiple staining.
This CD8 alpha antibody serves as an effective marker of cytotoxic T lymphocytes by binding to the CD8 co-receptor expressed on the cell surface of cytotoxic T cells, recognizing the topological domain of CD8 alpha. Because this CD8 antibody is made to the alpha chain it will recognize both the CD8 alpha - CD8 beta heterodimer, the most common form, as well as the CD8 alpha - CD8 alpha homodimer. The CD8A gene is also expressed in natural killer cells (NK cells), dendritic cells and cortical thymocytes making the CD8 alpha antibody a potential marker for these cells.
CD8 Antibody (53-6.7) was developed against mouse thymus or spleen.
Most thymocytes, T cell subset, some NK cells
Protein A or G purified
Test in a species/application not listed above to receive a full credit towards a future purchase.
Each lot of this CD8a antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For immunofluorescent staining, the suggested use of this reagent is <0.25 ug/10^6 cells in 100 uL volume. It is recommended that the reagent be titrated for optimal performance for each application. The 53-6.7 antibody has been reported to block antigen presentation via MHC class I and inhibit T cell responses to IL-2. This antibody has also been used for depletion of CD8a+ cells. Additional reported applications (for the relevant formats) include: immunoprecipitation, in vivo and in vitro cell depletion, inhibition of CD8 T cell proliferation, blocking of cytotoxicity, and immunohistochemical staining of both acetone-fixed frozen sections and zinc-fixed paraffin-embedded sections. Use in ICC/IF was reported in scientific literature. Use in Immunohistochemistry-Paraffin reported in scientific literature (PMID 24565643).
27 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Read 2 Reviews rated 5 using NBP1-49045 in the following applications:
Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
0.02% Sodium Azide
Protein A or G purified
Alternate Names for CD8 Antibody (53-6.7)
53-6.7 CD8 Alpha
53-6.7 CD8 Aplha
CD8 antigen, alpha polypeptide (p32)
Cytotoxic T cell marker
Cytotoxic T lymphocyte marker
Leu2 T-lymphocyte antigen
OKT8 T-cell antigen
T cell co-receptor
T cell marker
T8 T-cell antigen
T-cell antigen Leu2
T-cell surface glycoprotein CD8 alpha chain
T-lymphocyte differentiation antigen T8/Leu-2
CD8, also known as Leu-2 or T8 in human and Lyt2 or Lyt3 in mouse, is a cell surface glycoprotein belonging to the immunoglobulin supergene family (1, 2). CD8 is expressed on cytotoxic T-lymphocytes (T-cells), most thymocytes, between 35-45% of peripheral blood lymphocytes, and a population of natural killer (NK) cells (1, 2). The CD8 molecule consists of disulfide-linked alpha (alpha) and beta (beta) chains that present on T-cells as either CD8alphaalpha homodimers or CD8alphabeta heterodimers (1, 3). Both alpha and beta chains consist of a signaling sequence, an extracellular Ig-like domain, a membrane proximal stalk region, a transmembrane domain, and a cytoplasmic tail (3). Human CD8alpha is processed as 235 amino acids (aa) in length with a theoretical molecular weight of ~26 kDa, while mouse CD8alpha is 247 aa and has a theoretical molecular weight of 27.5 kDa (4, 5). Functionally, CD8 acts as an antigen coreceptor on cytotoxic T-cells and interacts with the major histocompatibility complex (MHC) class I molecules on antigen presenting cells (APCs), mediating cell-cell interactions within the immune system. Conversely, CD4 molecules interact with antigens presented on MHC class II molecules and are activated to become helper T-cells (TH) (1,2). Interestingly, thymocytes can transiently express both CD4 and CD8 during the maturation process (2). Furthermore, the cytoplasmic tail of CD8 has a Lck (lymphocyte-specific protein tyrosine kinase) binding domain where Lck interacts with CD8, initiating a phosphorylation cascade that activates transcription factors and promotes T-cell activation (6). More specifically, CD8alphabeta functions as a T-cell co-receptor, while CD8alphaalpha promotes T-cell survival and differentiation (7).
Given its role in the immune system, CD8-deficiency in T-cells is a hallmark of many diseases and pathologies (8-10). Specifically, CD8+ T-cell deficiency is prevalent in chronic autoimmune diseases including multiple sclerosis, rheumatoid arthritis, ulcerative colitis, Crohn's disease, type 1 diabetes mellitus, and Graves' disease (8). Furthermore, cancers or chronic infection can lead to CD8 T-cell exhaustion as the continual antigen presentation and inflammatory signals eventually cause the CD8+ T-cells to lose functionality (9, 10). However, animal models and clinical studies have suggested that T-cells are capable of being reinvigorated using inhibitory receptor blockade resulting in better disease outcomes and these exhausted T-cells may be a potential therapeutic target (9, 10).
Alternative names for CD8 includes CD antigen: CD8a, CD8 antigen, alpha polypeptide (p32), CD8a molecule, CD8A, Leu2 T-lymphocyte antigen, LEU2, MAL, OKT8 T-cell antigen, p32, T cell co-receptor, T8 T-cell antigen, T-cell antigen Leu2, T-cell surface glycoprotein CD8 alpha chain, and T-lymphocyte differentiation antigen T8/Leu-2.
1. Littman D. R. (1987). The structure of the CD4 and CD8 genes. Annual review of immunology. https://doi.org/10.1146/annurev.iy.05.040187.003021
2. Naeim F. (2008). Chapter 2- Principles of Immunophenotyping. Hematopathology. https://doi.org/10.1016/B978-0-12-370607-2.00002-8.
3. Gao, G. F., & Jakobsen, B. K. (2000). Molecular interactions of coreceptor CD8 and MHC class I: the molecular basis for functional coordination with the T-cell receptor. Immunology today. https://doi.org/10.1016/s0167-5699(00)01750-3
4. UniProt (P01732)
5. UniProt (P01731)
6. Kappes D. J. (2007). CD4 and CD8: hogging all the Lck. Immunity. https://doi.org/10.1016/j.immuni.2007.11.002
7. Gangadharan, D., & Cheroutre, H. (2004). The CD8 isoform CD8alphaalpha is not a functional homologue of the TCR co-receptor CD8alphabeta. Current opinion in immunology. https://doi.org/10.1016/j.coi.2004.03.015
8. Pender M. P. (2012). CD8+ T-Cell Deficiency, Epstein-Barr Virus Infection, Vitamin D Deficiency, and Steps to Autoimmunity: A Unifying Hypothesis. Autoimmune diseases. https://doi.org/10.1155/2012/189096
9. Kurachi M. (2019). CD8+ T cell exhaustion. Seminars in immunopathology. https://doi.org/10.1007/s00281-019-00744-5
10. Hashimoto, M., Kamphorst, A. O., Im, S. J., Kissick, H. T., Pillai, R. N., Ramalingam, S. S., Araki, K., & Ahmed, R. (2018). CD8 T Cell Exhaustion in Chronic Infection and Cancer: Opportunities for Interventions. Annual review of medicine. https://doi.org/10.1146/annurev-med-012017-043208
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.
FAQs for CD8 Antibody (NBP1-49045). (Showing 1 - 1 of 1 FAQs).
Could you provide me with any suggestions for CD8 antibodies that work well with a CD4 antibody?
NBP1-28254, NBP1-28336, NBP1-28238, NBP1-49045 and NBP2-80658 have images of mostly Flow Cytometry analyses for CD4 and CD8. NB200-578 induces transplantation tolerance when used in conjunction with CD4 antibodies. I would suggest taking a look at these products to determine if they would be suitable for your experiments.
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