Abstract：
:Expression of resistance to cis-diamminedichloroplatinum(II) (CDDP), one of the most effective chemotherapeutic drugs used to treat a variety of malignancies, remains a serious obstacle for improving cancer treatment. To study possible genetic mechanisms underlying the development of CDDP resistance, we have adopted the approach of retroviral insertional mutagenesis. An early-stage CDDP-sensitive human melanoma cell line, WM35, was infected with a defective amphotropic murine retrovirus (murine stem cell virus), and the pooled cells were subsequently selected for CDDP-resistant variants. Nine CDDP-resistant clones independently derived from murine stem cell virus-infected WM35 cells were analyzed and it was found that five of these clones acquired an identical retroviral integration site, designated as CDDP resistance locus 1 (CRL-1), as revealed by isolation of retroviral flanking sequences. Furthermore, using the flanking sequence as probe, we have detected a 3.5-4.0-kilobase message, the expression of which is strongly increased in clones carrying a rearranged CRL-1 locus. These results strongly suggest that overexpression of CRL-1 confers resistance to CDDP in these clones. In addition, the present study indicates that retroviral insertional mutagenesis represents a potential strategy to identify genes responsible for CDDP resistance and possibly other chemotherapeutic drugs as well.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Lu SJ,Man S,Bani MR,Adachi D,Hawley RG,Kerbel RS,Ben-David Ysubject
Has Abstractpub_date
1995-03-01 00:00:00pages
1139-45issue
5eissn
0008-5472issn
1538-7445journal_volume
55pub_type
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