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Expression of human B-Cell specific receptor FCRL1 in healthy individuals and in patients with autoimmune diseases


The expression levels of the FCRL1 gene, which encodes a human B-cell surface receptor, were compared in healthy individuals and patients with autoimmune diseases. The expression levels were evaluated using DNA dot hybridization on membranes with spotted cDNA samples derived from blood-cell sub-populations of patients with autoimmune diseases. Quantification of the hybridization signals showed that FCRL1 expression in peripheral blood B-lymphocytes of patients with multiple sclerosis, lupus anticoagulants, Takayasu’s arteritis, and von Willebrand disease was significantly higher than in healthy individuals. Monoclonal and polyclonal FCRL1-specific antibodies that enable FCRL1 detection in Western blotting, immunohistochemistry, and flow-cytometry assays were generated. It was found that FCRL1 is expressed on the surfaces of mature CD19+ B-cells. In the tonsils, FCRL1-positive cells were located in the crypt area, i.e., in the mantle zone of secondary lymphoid follicles and among the cells of lymphoid epithelium. FCRL1-positive cells were also found in B-cell follicles of the spleen.

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FcR-like receptor


monoclonal antibody


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Correspondence to K. O. Baranov.

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Original Russian Text © K.O. Baranov, O.Yu. Volkova, L.V. Mechetina, N.A. Chikaev, E.S. Reshetnikova, G.M. Nikulina, A.V. Taranin, A.M. Najakshin, 2012, published in Molekulyarnaya Biologiya, 2012, Vol. 46, No. 3, pp. 500–507.

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Baranov, K.O., Volkova, O.Y., Mechetina, L.V. et al. Expression of human B-Cell specific receptor FCRL1 in healthy individuals and in patients with autoimmune diseases. Mol Biol 46, 450–456 (2012).

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  • B cells
  • FCRL family
  • autoimmune diseases
  • monoclonal antibody
  • immunohistochemistry
  • flow cytometry