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Träfflista för sökning "L773:1421 9778 srt2:(2005-2009)"

Sökning: L773:1421 9778 > (2005-2009)

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  • Janson, Veronica, et al. (författare)
  • Acquisition of Cisplatin-resistance in Malignant Mesothelioma Cells Abrogates Na,K(+),2Cl(-;)-cotransport Activity and Cisplatin-induced Early Membrane Blebbing
  • 2008
  • Ingår i: Cellular Physiology and Biochemistry. - : S. Karger. - 1015-8987 .- 1421-9778. ; 22:1-4, s. 45-56
  • Tidskriftsartikel (refereegranskat)abstract
    • AIMS: Resistance mechanisms are important limiting factors in the treatment of solid malignancies with cis-diamminedichloroplatinum(II) (cisplatin). To gain further understanding of the effects of acquired cisplatin-resistance, we compared a human malignant pleural mesothelioma cell line (p31) to a sub-line (p31res1.2) with acquired cisplatin-resistance.METHODS AND RESULTS: The role of Na(+),K(+),2Cl(-)-cotransport (NKCC1) activity in cisplatin-induced morphological changes and acquired cisplatin-resistance was investigated in a time-resolved manner. Acquisition of cisplatin-resistance resulted in markedly reduced NKCC1 activity, absence of cisplatin-induced early membrane blebbing, and increased basal caspase-3 activity. At equitoxic cisplatin concentrations, P31res1.2 cells had a faster activation of caspase-3 than P31 cells, but the end-stage cytotoxicity and number of cells with DNA fragmentation was similar. Bumetanide inhibition of NKCC1 activity in P31 cells repressed cisplatin-induced early-phase membrane blebbing but did not increase P31 cell resistance to cisplatin.CONCLUSIONS: Together, these results suggest that active NKCC1 was necessary for cisplatin-induced early membrane blebbing of P31 cells, but not for cisplatin-resistance. Thus, acquisition of cisplatin-resistance can affect mechanisms that have profound effects on cisplatin-induced morphological changes but are not necessary for the subsequent progression to apoptosis.
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