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dc.contributor.authorJelinek, J
dc.contributor.authorRafferty, Joseph A
dc.contributor.authorCmejla, R
dc.contributor.authorHildinger, M
dc.contributor.authorChinnasamy, Dhanalakshmi
dc.contributor.authorLashford, Linda S
dc.contributor.authorOstertag, W
dc.contributor.authorMargison, Geoffrey P
dc.contributor.authorDexter, T Michael
dc.contributor.authorFairbairn, Leslie J
dc.contributor.authorBaum, Christopher
dc.date.accessioned2010-02-08T15:29:25Z
dc.date.available2010-02-08T15:29:25Z
dc.date.issued1999-08
dc.identifier.citationA novel dual function retrovirus expressing multidrug resistance 1 and O6-alkylguanine-DNA-alkyltransferase for engineering resistance of haemopoietic progenitor cells to multiple chemotherapeutic agents. 1999, 6 (8):1489-93 Gene Ther.en
dc.identifier.issn0969-7128
dc.identifier.pmid10467374
dc.identifier.doi10.1038/sj.gt.3300962
dc.identifier.urihttp://hdl.handle.net/10541/91413
dc.description.abstractFollowing transduction with a retrovirus (SF1MIH) expressing both the multidrug resistance 1 (MDR1) and O6-alkylguanine-DNA-alkyltransferase (ATase) proteins, human erythroleukaemic progenitor (K562) cells were isolated which were resistant to killing by the MDR1 substrate, colchicine. In colony-forming survival assays, K562-SF1MIH cells exhibited resistance to colchicine and doxorubicin, as well as to the O6-alkylating agents N-Methyl-N-nitrosourea (MNU) and temozolomide. Furthermore, the resistance to doxorubicin was abolished by preincubation with the MDR1 inhibitor verapamil while resistance to MNU was ablated by the specific ATase inactivator, O6-benzylguanine (O6-beG) confirming that resistance to doxorubicin and MNU was conferred by MDR1 and ATase, respectively. When K562-SF1MIH were exposed to combinations of colchicine and MNU or doxorubicin and temozolomide, simultaneous resistance to these agents was observed. Thus, transduction of K562 with SF1MIH conferred dual resistance to these cells. These data offer the prospect of designing vectors that will confer resistance to entire regimens of chemotherapy rather than just to individual components of such drug cocktails, thereby substantially increasing the efficacy of therapy. Furthermore, the use of such dual expression constructs is likely to be highly informative for the design of effective in vivo selection protocols, an issue likely to make a major impact in a clinical context in gene therapy in the near future.
dc.language.isoenen
dc.subjectCancer Drug Resistanceen
dc.subjectHaematopoietic Stem Cellsen
dc.subject.meshAntineoplastic Agents
dc.subject.meshDrug Resistance, Multiple
dc.subject.meshDrug Resistance, Neoplasm
dc.subject.meshGenes, MDR
dc.subject.meshGenetic Vectors
dc.subject.meshHematopoietic Stem Cells
dc.subject.meshHumans
dc.subject.meshK562 Cells
dc.subject.meshO(6)-Methylguanine-DNA Methyltransferase
dc.subject.meshRetroviridae
dc.subject.meshTransduction, Genetic
dc.titleA novel dual function retrovirus expressing multidrug resistance 1 and O6-alkylguanine-DNA-alkyltransferase for engineering resistance of haemopoietic progenitor cells to multiple chemotherapeutic agents.en
dc.typeArticleen
dc.contributor.departmentInstitute of Haematology and Blood Transfusion, Praha, Czech Republic.en
dc.identifier.journalGene Therapyen
html.description.abstractFollowing transduction with a retrovirus (SF1MIH) expressing both the multidrug resistance 1 (MDR1) and O6-alkylguanine-DNA-alkyltransferase (ATase) proteins, human erythroleukaemic progenitor (K562) cells were isolated which were resistant to killing by the MDR1 substrate, colchicine. In colony-forming survival assays, K562-SF1MIH cells exhibited resistance to colchicine and doxorubicin, as well as to the O6-alkylating agents N-Methyl-N-nitrosourea (MNU) and temozolomide. Furthermore, the resistance to doxorubicin was abolished by preincubation with the MDR1 inhibitor verapamil while resistance to MNU was ablated by the specific ATase inactivator, O6-benzylguanine (O6-beG) confirming that resistance to doxorubicin and MNU was conferred by MDR1 and ATase, respectively. When K562-SF1MIH were exposed to combinations of colchicine and MNU or doxorubicin and temozolomide, simultaneous resistance to these agents was observed. Thus, transduction of K562 with SF1MIH conferred dual resistance to these cells. These data offer the prospect of designing vectors that will confer resistance to entire regimens of chemotherapy rather than just to individual components of such drug cocktails, thereby substantially increasing the efficacy of therapy. Furthermore, the use of such dual expression constructs is likely to be highly informative for the design of effective in vivo selection protocols, an issue likely to make a major impact in a clinical context in gene therapy in the near future.


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