Possible Mechanism Responsible for the Acquisition of Resistance to Cis-Diamminedichloroplatinum (II) by Cultured Human Testicular Seminoma Cells

作者: TATSUYA KOBAYASHI , TOMOHIRO FUJII , YOSHIMASA JO , KEIGO KINUGAWA , MASATO FUJISAWA

DOI: 10.1097/01.JU.0000122901.70300.20

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摘要: ABSTRACTPurpose: We established a cis-diamminedichloroplatinum (II) (CDDP) resistant cell line and determined the mechanisms of CDDP resistance.Materials Methods: The JKT/DDP was from highly metastatic human testicular seminoma JKT-HM by long-term intermittent administration low dose CDDP. Growth curves, sensitivity intracellular concentrations were compared in JKT/DDP, JKT-1 cells. Expression mRNA MDR1, MRP, LRP GST-π also compared.Results: growth curve doubling time similar to those culture without but different with added culture. Morphologically cytoplasm segmentation chromatin aggregation observed when present, while cells spindle-shaped showed cobblestone growth.The IC50 for collagen gel drop embedded drug test that JKT...

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