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EnglishResistance to tyrosine kinase inhibitors (TKIs) has many facets. The causes of resistance include low patient compliance, low plasma or intracellular drug concentration, BCR-ABL1 mutations, and clonal chromosome abnormalities in Ph+ cells, but in at least 50% of patients the causes are currently unknown. Primary resistance occurs when a predefined response level is not achieved within a prespecified period of time. Not achieving a complete hematologic response (CHR) within 3 months, not achieving a partial cytogenetic response and/or a BCR-ABL1 transcripts level <= 10% (international standard) within 6 months, and not achieving a complete cytogenetic response (CCyR) and/or a BCR-ABL1 transcripts level <1% within 12 months, define primary resistance. Secondary resistance is defined by a loss of CHR, or CCyR, or major molecular response. Resistance to imatinib calls without exceptions for a second-generation TKI. In case of resistance to two TKIs, an allogeneic stem cell transplantation should be considered
| Titolo: | Definition and treatment of resistance to tyrosine kinase inhibitors in chronic myeloid leukemia |
| Autore/i: | BACCARANI, MICHELE; CASTAGNETTI, FAUSTO; GUGLIOTTA, GABRIELE; PALANDRI, FRANCESCA; ROSTI, GIANANTONIO |
| Autore/i Unibo: | |
| Anno: | 2014 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1586/17474086.2014.900432 |
| Abstract: | Resistance to tyrosine kinase inhibitors (TKIs) has many facets. The causes of resistance include low patient compliance, low plasma or intracellular drug concentration, BCR-ABL1 mutations, and clonal chromosome abnormalities in Ph+ cells, but in at least 50% of patients the causes are currently unknown. Primary resistance occurs when a predefined response level is not achieved within a prespecified period of time. Not achieving a complete hematologic response (CHR) within 3 months, not achieving a partial cytogenetic response and/or a BCR-ABL1 transcripts level <= 10% (international standard) within 6 months, and not achieving a complete cytogenetic response (CCyR) and/or a BCR-ABL1 transcripts level <1% within 12 months, define primary resistance. Secondary resistance is defined by a loss of CHR, or CCyR, or major molecular response. Resistance to imatinib calls without exceptions for a second-generation TKI. In case of resistance to two TKIs, an allogeneic stem cell transplantation should be considered |
| Data stato definitivo: | 2015-11-30T18:46:42Z |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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