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- W2042520753 abstract "The BCR/ABL oncogene is responsible for the phenotype of Philadelphia chromosome-positive (Ph+) leukemia. BCR/ABL exhibits an aberrant ABL-tyrosine kinase activity. The treatment of advanced Ph+ leukemia with selective ABL-kinase inhibitors such as Imatinib, Nilotinib and Dasatinib is initially effective but rapidly followed by resistance mainly because of specific mutations in BCR/ABL. Tetramerization of ABL through the N-terminal coiled-coil region (CC) of BCR is essential for the ABL-kinase activation. Targeting the CC-domain forces BCR/ABL into a monomeric conformation reduces its kinase activity and increases the sensitivity for Imatinib. We show that (i) targeting the tetramerization by a peptide representing the Helix-2 of the CC efficiently reduced the autophosphorylation of both unmutated and mutated BCR/ABL; (ii) Helix-2 inhibited the transformation potential of BCR/ABL independently of the presence of mutations; and (iii) Helix-2 efficiently cooperated with Imatinib as revealed by their effects on the transformation potential and the factor-independence related to BCR/ABL with the exception of mutant T315I. These findings support earlier observations that BCR/ABL harboring the T315I mutation have a transformation potential that is at least partially independent of its kinase activity. These data provide evidence that the inhibition of tetramerization inhibits BCR/ABL-mediated transformation and can contribute to overcome Imatinib-resistance. © 2008 Wiley-Liss, Inc." @default.
- W2042520753 created "2016-06-24" @default.
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- W2042520753 date "2008-01-01" @default.
- W2042520753 modified "2023-10-06" @default.
- W2042520753 title "Targeting of the N-terminal coiled coil oligomerization interface by a helix-2 peptide inhibits unmutated and imatinib-resistant BCR/ABL" @default.
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- W2042520753 doi "https://doi.org/10.1002/ijc.23467" @default.
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