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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

A surface glycoprotein complex related to the adhesive receptors of the VLA family, shared by epidermal Langerhans cells and basal keratinocytes.

A murine monoclonal antibody, designated K20, was raised by immunization with a human malignant T-cell line. It reacted specifically with membrane glycoprotein complexes on early haematopoietic cells, T cells, and monocytes. In epidermis, K20 specifically reacted with Langerhans cells and basal keratinocytes, as demonstrated by double labeling experiments. Membrane immunoprecipitation analysis demonstrated that the antigen identified by K20 on lymphoid cells and epidermal cells was different. While on lymphoid cells, K20 recognized glycoprotein complexes made of a constant 130-kD subunit associated with subunits of higher molecular weight ranging from 150 to 200 kD, a complex of 105-145 kD was precipitated from Langerhans and basal cells. Metabolic labeling studies demonstrated that these proteins were synthesized by the basal cells. The antigen identified by K20 was thought to belong to the integrins, a family of cell surface receptors that play a role in cell adhesion, cell interactions, wound healing, and immune defense mechanisms. K20 is the first monoclonal antibody that specifically recognizes a membrane antigen common to Langerhans and basal cells. Additionally, K20 is the first of five reported monoclonal antibodies to have been characterized on the epidermal cells that detect antigens shared by lymphoid subpopulations and normal basal keratinocytes.[1]

References

  1. A surface glycoprotein complex related to the adhesive receptors of the VLA family, shared by epidermal Langerhans cells and basal keratinocytes. Staquet, M.J., Dezutter-Dambuyant, C., Schmitt, D., Amiot, M., Boumsell, L., Thivolet, J. J. Invest. Dermatol. (1989) [Pubmed]
 
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