Production and Characterization of Monoclonal Antibodies against Two Haptenic Derivatives of 1α, 25-Dihydroxyvitamin D_3 Conjugated with Bovine Serum Albumin through the C-3 or C-24 Position

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To develop the immunochemical methods for determining 1α, 25-dihydroxyvitamin D_3 [1,25(OH)_2D_3] in clinical samples, a variety of monoclonal anti-1,25(OH)_2D_3 antibodies have been generated. Two kinds of hapten-carrier conjugates, 25-hydroxyvitamin D_3 3-hemisuccinate (hapten 3-HS) and 1α-hydroxy-25,26,27-trinorvitamin D_3 24-oic acid (hapten 24-OA) conjugated with bovine serum albumin, were used for immunization. Spleen cells from SD rats or BALB/c mice, each immunized with the conjugate of hapten 3-HS or 24-OA, were fused with P3/NS1/1-Ag4-1 myeloma cells. After screening by ELISA employing β-galactosidase-labeled haptens, seven kinds of hybridomas secreting anti-1,25(OH)_2D_3 antibodies were established. Binding characteristics of these antibodies (K_a 0.73-20×10^9 M^<-1>) were investigated by an RIA using tritium-labeled 1,25(OH)_2D_3. The data suggested that the rat monoclonal antibody 3R-1 derived from the hapten 3-HS and the mouse monoclonal antibody 24M-3 from the hapten 24-OA would be available for developing practical analytical systems.
公益社団法人日本薬学会の論文
1997-09-15