Immunological identification of 1,25-dihydroxyvitamin D3 receptors in human promyelocytic leukemic cells (HL-60) during homologous regulation.

作者: Y Lee , M Inaba , H F DeLuca , W S Mellon

DOI: 10.1016/S0021-9258(18)80055-2

关键词:

摘要: Immunological techniques were utilized to detect 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) receptor levels and characterize physical/chemical changes in receptors human promyelocytic leukemic cells (HL-60) during continuous exposure hormone. The monoclonal antibody (IVG8C11) raised against the porcine intestinal 1,25-(OH)2D3 immunoprecipitated quantitatively nuclear extracts from HL-60 cells. highly enriched electrophoresed on sodium dodecyl sulfate-polyacrylamide gels transferred polyvinylidene difluoride membranes, which probed with 125I-labeled IVG8C11. basal treated for 2 h was detected as a single form at 53 kDa. Moreover, shown be up-regulated 12 down-regulated 48 72 presence of hormone evidenced by ratio density bands, 1.0 (2 h):4.2 (12 h):1.2 (48 h):0.9 (72 h), measured laser scanning densitometry. up- also forms had same molecular mass receptor. Therefore, data presented here strongly support hypothesis homologous regulation intact target

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