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Mouse Monoclonal to CD1a

HI149 (IgG1)

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CD1a, together with CD1b and c, belongs to group 1 of CD1 glycoproteins. These proteins serve as antigen-presenting molecules for a subset of T cells that responds to specific lipids and glycolipids found in the cell walls of bacterial pathogens or self-glycolipid antigens such as gangliosides, and they have also roles in antiviral immunity. Unlike CD1b, CD1a is excluded from late endosomal compartments and instead traffics independently in the recycling pathway of the early endocytic system, and CD1a antigen presentation is independent upon vesicular acidification.


The antibody HI149 reacts with CD1a (T6), a 49 kDa polypeptide associated with beta2-microglobulin expressed on cortical thymocytes (strongly), Langerhans cells, dendritic cells and some T cell leukemias and lymphomas.
The antibody does not react with peripheral blood T and B lymphocytes, monocytes, granulocytes, platelets and erythrocytes.
HLDA V; WS Code CD01.01

Regulatory Status


Human thymocytes

Species Reactivity:

  • Human
  • Other not tested

Negative Species:


  • Flow Cytometry
  • Immunohistochemistry (frozen sections)
Usage note:
Indicated dilutions are recommended starting points for use of this product. Working concentrations should be determined by the investigator.

General references

  • *Sugita M, Grant EP, van Donselaar E, Hsu VW, Rogers RA, Peters PJ, Brenner MB: Separate pathways for antigen presentation by CD1 molecules. Immunity. 1999 Dec;11(6):743-52.
  • *Hiromatsu K, Dascher CC, Sugita M, Gingrich-Baker C, Behar SM, LeClair KP, Brenner MB, Porcelli SA: Characterization of guinea-pig group 1 CD1 proteins. Immunology. 2002 Jun;106(2):159-72. [Full Text]
  • *Raftery MJ, Winau F, Kaufmann SH, Schaible UE, Schönrich G: CD1 antigen presentation by human dendritic cells as a target for herpes simplex virus immune evasion. J Immunol. 2006 Nov 1;177(9):6207-14. [Full Text]
  • Product Specific References

  • *Leukocyte Typing V., Schlossman S. et al. (Eds.), Oxford University Press (1995).
  • *Angel CE, Lala A, Chen CJ, Edgar SG, Ostrovsky LL, Dunbar PR: CD14+ antigen-presenting cells in human dermis are less mature than their CD1a+ counterparts. Int Immunol. 2007 Nov;19(11):1271-9. [Abstract] [Full Text]
  • *Favali C, Tavares N, Clarêncio J, Barral A, Barral-Netto M, Brodskyn C: Leishmania amazonensis infection impairs differentiation and function of human dendritic cells. J Leukoc Biol. 2007 Dec;82(6):1401-6. [Abstract] [Full Text]
  • *Hunger RE, Sieling PA, Ochoa MT, Sugaya M, Burdick AE, Rea TH, Brennan PJ, Belisle JT, Blauvelt A, Porcelli SA, Modlin RL: Langerhans cells utilize CD1a and langerin to efficiently present nonpeptide antigens to T cells. J Clin Invest. 2004 Mar;113(5):701-8. [Abstract] [Full Text]
  • *Mayer WJ, Irschick UM, Moser P, Wurm M, Huemer HP, Romani N, Irschick EU: Characterization of antigen-presenting cells in fresh and cultured human corneas using novel dendritic cell markers. Invest Ophthalmol Vis Sci. 2007 Oct;48(10):4459-67. [Abstract] [Full Text]
  • *Demedts IK, Brusselle GG, Vermaelen KY, Pauwels RA: Identification and characterization of human pulmonary dendritic cells. Am J Respir Cell Mol Biol. 2005 Mar;32(3):177-84. [Abstract] [Full Text]
  • *Kirsch BM, Zeyda M, Stuhlmeier K, Grisar J, Smolen JS, Watschinger B, Stulnig TM, Hörl WH, Zlabinger GJ, Säemann MD: The active metabolite of leflunomide, A77 1726, interferes with dendritic cell function. Arthritis Res Ther. 2005;7(3):R694-703. [Abstract] [Full Text]
  • *Perros F, Dorfmüller P, Souza R, Durand-Gasselin I, Mussot S, Mazmanian M, Hervé P, Emilie D, Simonneau G, Humbert M: Dendritic cell recruitment in lesions of human and experimental pulmonary hypertension. Eur Respir J. 2007 Mar;29(3):462-8. [Abstract] [Full Text]
  • *McKenna RW, Asplund SL, Kroft SH: Immunophenotypic analysis of hematogones (B-lymphocyte precursors) and neoplastic lymphoblasts by 4-color flow cytometry. Leuk Lymphoma. 2004 Feb;45(2):277-85. [Abstract]
  • *Chen X, Murakami T, Oppenheim JJ, Howard OM: Triptolide, a constituent of immunosuppressive Chinese herbal medicine, is a potent suppressor of dendritic-cell maturation and trafficking. Blood. 2005 Oct 1;106(7):2409-16. [Abstract] [Full Text]
  • *Säemann MD, Parolini O, Böhmig GA, Kelemen P, Krieger PM, Neumüller J, Knarr K, Kammlander W, Hörl WH, Diakos C, Stuhlmeier K, Zlabinger GJ: Bacterial metabolite interference with maturation of human monocyte-derived dendritic cells. J Leukoc Biol. 2002 Feb;71(2):238-46. [Abstract] [Full Text]
  • *Ohradanova-Repic A, Machacek C, Charvet C, Lager F, Le Roux D, Platzer R, Leksa V, Mitulovic G, Burkard TR, Zlabinger GJ, Fischer MB, Feuillet V, Renault G, Blüml S, Benko M, Suchanek M, Huppa JB, Matsuyama T, Cavaco-Paulo A, Bismuth G, Stockinger H: Extracellular Purine Metabolism Is the Switchboard of Immunosuppressive Macrophages and a Novel Target to Treat Diseases With Macrophage Imbalances. Front Immunol. 2018 Apr 27;9:852. [Abstract]
  • *And many other.
  • For research use only. Not for drug, diagnostic or other use.

    Related Products

  • Mouse IgG1 Isotype Control
  • Example Data

    HI149 APC

    Fig. 1. Detection of human CD1a on the surface of MOLT-4 (partially positive, red) and SP2 cells (negative, blue), determined using anti-human CD1a (HI149) APC.

    HI149 FITC

    Fig. 2. Detection of human CD1a on the surface of MOLT-4 cells (compared with blank) using anti-human CD1a (HI149) FITC.

    HI149 PE

    Fig. 3. Detection of human CD1a on the surface of MOLT-4 cells using anti-human CD1a (HI149) PE.

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