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Soluble thymic stromal lymphopoietin receptors are absent in murine sera – detection with anti-mTSLPR monoclonal antibodies

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Rosenqvist L, Andersson AM, Ohls S, Boström M, Nordström T, Lindqvist C. Soluble thymic stromal lymphopoietin receptors are absent in murine sera – detection with anti-mTSLPR monoclonal antibodies. APMIS 2005;113:324–31.

Two monoclonal antibodies, termed nnIE11 and nnIG11, were generated against the murine thymic stromal lymphopoietin receptor, mTSLPR, using traditional hybridoma technology. The antibody-producing hybridoma clones were obtained by fusing P3X63-Ag8.653 myeloma cells with splenocytes from Balb/c mice immunized with anti-FLAG M2 affinity-purified FLAG-tagged mTSLPR from pSVL-mTSLPR-FLAG-transfected COS cells and Ni-NTA-purified his-tagged mTSLPR from recombinant FastBacHisB-mδ1 baculovirus-infected Sf9 cells. Several monoclonal anti-mTSLPR-specific hybridoma clones were obtained and two of these clones are further characterized here. The generated antibodies could in an immunoblotting identify baculovirus-expressed mTSLPR proteins with a molecular weight corresponding to 50 kDa. Both immunoblotting and ELISA with recombinant mouse TSLPR/Fc chimera as antigen, having only the N-terminal domain of mTSLPR present, indicated that the generated monoclonal antibodies identify the C-terminus of mTSLPR. Although sandwich ELISAs performed with a goat anti-mTSLPR antiserum as capture antibody and nnIE11 as indicator antibody were able to detect mTSLPR in the range of 5 ng/ml, no souble mTSLPR could be observed in serum samples from CBA/H, Balb/c and C57Bl/6 mice.
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Keywords: ELISA; Monoclonal antibodies; baculovirus; mTSLPR; serum

Document Type: Research Article

Affiliations: 1: Biology, and 2: Biochemistry and Pharmacy, Åbo Akademi University, Turku, Finland

Publication date: 2005-05-01

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