BD Pharmingen™ Alexa Fluor™ 700 Mouse Anti-Human CD8
Clone HIT8a (RUO)
Multiparameter flow cytometric analysis of CD8 expression on Human peripheral blood leukocyte populations. Human whole blood was first treated with BD Pharm Lyse™ Lysing Buffer (Cat. No. 555899) to lyse erythrocytes, washed, and then preincubated with BD Pharmingen™ Human BD Fc Block™ (Cat. No. 564219/564220). The leukocytes were then stained with either Alexa Fluor™ 700 Mouse IgG1, κ Isotype Control (Cat. No. 557882; Left Plot) or Alexa Fluor™ 700 Mouse Anti-Human CD8 antibody (Cat. No. 570799/570875; Right Plot). The bivariate pseudocolor density plot showing the correlated expression of CD8 (or Ig Isotype control staining) versus side-light scatter (SSC-A) signals was derived from gated events with the forward and side light-scatter characteristics of viable leukocytes. Flow cytometry and data analysis were performed using a BD LSRFortessa™ X-20 Cell Analyzer System and FlowJo™ Software.
Multiparameter flow cytometric analysis of CD8 expression on Human peripheral blood leukocyte populations. Human whole blood was first treated with BD Pharm Lyse™ Lysing Buffer (Cat. No. 555899) to lyse erythrocytes, washed, and then preincubated with BD Pharmingen™ Human BD Fc Block™ (Cat. No. 564219/564220). The leukocytes were then stained with either Alexa Fluor™ 700 Mouse IgG1, κ Isotype Control (Cat. No. 557882; Left Plot) or Alexa Fluor™ 700 Mouse Anti-Human CD8 antibody (Cat. No. 570799/570875; Right Plot). The bivariate pseudocolor density plot showing the correlated expression of CD8 (or Ig Isotype control staining) versus side-light scatter (SSC-A) signals was derived from gated events with the forward and side light-scatter characteristics of viable leukocytes. Flow cytometry and data analysis were performed using a BD LSRFortessa™ X-20 Cell Analyzer System and FlowJo™ Software.
Preparation And Storage
Recommended Assay Procedures
BD® CompBeads can be used as surrogates to assess fluorescence spillover (compensation). When fluorochrome conjugated antibodies are bound to BD® CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cell and BD® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.
Product Notices
- Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
- This reagent has been pre-diluted for use at the recommended Volume per Test. We typically use 1 × 10^6 cells in a 100-µl experimental sample (a test).
- An isotype control should be used at the same concentration as the antibody of interest.
- Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
- For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
- Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
- This product is provided under an intellectual property license between Life Technologies Corporation and BD Businesses. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The buyer cannot sell or otherwise transfer (a) this product (b) its components or (c) materials made using this product or its components to a third party or otherwise use this product or its components or materials made using this product or its components for Commercial Purposes. Commercial Purposes means any activity by a party for consideration and may include, but is not limited to: (1) use of the product or its components in manufacturing; (2) use of the product or its components to provide a service, information, or data; (3) use of the product or its components for therapeutic, diagnostic or prophylactic purposes; or (4) resale of the product or its components, whether or not such product or its components are resold for use in research. For information on purchasing a license to this product for any other use, contact Life Technologies Corporation, Cell Analysis Business Unit Business Development, 29851 Willow Creek Road, Eugene, OR 97402, USA, Tel: (541) 465-8300. Fax: (541) 335-0504.
- Alexa Fluor™ is a trademark of Life Technologies Corporation.
- For U.S. patents that may apply, see bd.com/patents.
Companion Products
The HIT8a monoclonal antibody specifically binds to CD8a (CD8α). CD8α is a type I transmembrane glycoprotein and a member of the immunoglobulin superfamily. CD8α is expressed by the majority of thymocytes, by subpopulations of αβ T cells and γδ T cells and by some NK cells. Cell surface CD8α is expressed either as a disulfide-linked homodimer (CD8αα) or as a heterodimer (CD8αβ) when disulfide-bonded to a CD8 beta chain (CD8β). CD8-positive αβ T cells coexpress both CD8αα homodimers and CD8αβ heterodimers whereas some γδ T cells and NK cells express CD8αα homodimers. CD8 plays important roles in T cell activation and selection. The extracellular IgSF domain of CD8α binds to a non-polymorphic determinant on HLA class I molecules (α3 domain) and enables CD8 to function as a co-receptor with MHC class I-restricted TCR during T cell recognition of antigen. The cytoplasmic domain of CD8α associates with Lck, a Src family protein tyrosine kinase that is involved in intracellular signaling. Clones HIT8a and RPA-T8 are not cross-blocking.
Development References (6)
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Flores-Villanueva PO, Ganachari M, Guio H, Mejia JA, Granados J. An Isolated TCR αβ Restricted by HLA-A*02:01/CT37 Peptide Redirecting CD8+ T Cells To Kill and Secrete IFN-γ in Response to Lung Adenocarcinoma Cell Lines.. J Immunol. 2018; 200(8):2965-2977. (Clone-specific). View Reference
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Garbrecht F, Loebel A, Disanto JP, Flomenberg N. Chatacterization of Workshop antiCD8 mAb using human CD8-expressing murine L-cell transfectants. In: Schlossman SF. Stuart F. Schlossman .. et al., ed. Leucocyte typing V : white cell differentiation antigens : proceedings of the fifth international workshop and conference held in Boston, USA, 3-7 November, 1993. Oxford: Oxford University Press; 1995:354-356.
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Lang C, Wang J, Chen L. CD25-expressing Th17 cells mediate CD8+ T cell suppression in CTLA-4 dependent mechanisms in pancreatic ductal adenocarcinoma.. Exp Cell Res. 2017; 360(2):384-389. (Clone-specific: Flow cytometry). View Reference
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Lin G-X, Yang X, Hollemweguer E, et al. Cross-reactivity of CD antibodies in eight animal species. In: Mason D. David Mason .. et al., ed. Leucocyte typing VII : white cell differentiation antigens : proceedings of the Seventh International Workshop and Conference held in Harrogate, United Kingdom. Oxford: Oxford University Press; 2002:519-523.
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Rabin RL, Park MK, Liao F, Swofford R, Stephany D, Farber JM. Chemokine receptor responses on T cells are achieved through regulation of both receptor expression and signaling. J Immunol. 1999; 162(7):3840-3850. (Clone-specific: Flow cytometry). View Reference
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Schlossman SF. Stuart F. Schlossman .. et al., ed. Leucocyte typing V : white cell differentiation antigens : proceedings of the fifth international workshop and conference held in Boston, USA, 3-7 November, 1993. Oxford: Oxford University Press; 1995.
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Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims. Comparisons are not made against non-BD technologies, unless otherwise noted.
For Research Use Only. Not for use in diagnostic or therapeutic procedures.