@article{HanfsteinLausekerHehlmannetal.2014,
  author    = {Hanfstein, Benjamin and Lauseker, Michael and Hehlmann, R{\"u}diger and Saussele, Susanne and Erben, Philipp and Dietz, Christian and Fabarius, Alice and Proetel, Ulrike and Schnittger, Susanne and Haferlach, Claudia and Krause, Stefan W. and Schubert, J{\"o}rg and Einsele, Hermann and H{\"a}nel, Mathias and Dengler, Jolanta and Falge, Christiane and Kanz, Lothar and Neubauer, Andreas and Kneba, Michael and Stengelmann, Frank and Pfreundschuh, Michael and Waller, Cornelius F. and Spiekerman, Karsten and Baerlocher, Gabriela M. and Pfirrmann, Markus and Hasford, Joerg and Hofmann, Wolf-Karsten and Hochhaus, Andreas and M{\"u}ller, Martin C.},
  title     = {Distinct characteristics of e13a2 versus e14a2 BCR-ABL1 driven chronic myeloid leukemia under first-line therapy with imatinib},
  series = {Haematologica},
  volume    = {99},
  journal   = {Haematologica},
  number    = {9},
  issn      = {1592-8721},
  doi       = {10.3324/haematol.2013.096537},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-115476},
  pages     = {1441-1447},
  year      = {2014},
  abstract  = {The vast majority of chronic myeloid leukemia patients express a BCR-ABL1 fusion gene mRNA encoding a 210 kDa tyrosine kinase which promotes leukemic transformation. A possible differential impact of the corresponding BCR-ABL1 transcript variants e13a2 ("b2a2") and e14a2 ("b3a2") on disease phenotype and outcome is still a subject of debate. A total of 1105 newly diagnosed imatinib-treated patients were analyzed according to transcript type at diagnosis (e13a2, n=451; e14a2, n=496; e13a2+e14a2, n=158). No differences regarding age, sex, or Euro risk score were observed. A significant difference was found between e13a2 and e14a2 when comparing white blood cells (88 vs. 65 x 10(9)/L, respectively; P<0.001) and platelets (296 vs. 430 x 109/L, respectively; P<0.001) at diagnosis, indicating a distinct disease phenotype. No significant difference was observed regarding other hematologic features, including spleen size and hematologic adverse events, during imatinib-based therapies. Cumulative molecular response was inferior in e13a2 patients (P=0.002 for major molecular response; P<0.001 for MR4). No difference was observed with regard to cytogenetic response and overall survival. In conclusion, e13a2 and e14a2 chronic myeloid leukemia seem to represent distinct biological entities. However, clinical outcome under imatinib treatment was comparable and no risk prediction can be made according to e13a2 versus e14a2 BCR-ABL1 transcript type at diagnosis. (clinicaltrials.gov identifier: 00055874)},
  language  = {en}
}
@article{SausseleHehlmannFabariusetal.2018,
  author    = {Saussele, Susanne and Hehlmann, Ruediger and Fabarius, Alice and Jeromin, Sabine and Proetel, Ulrike and Rinaldetti, Sebastien and Kohlbrenner, Katharina and Einsele, Hermann and Falge, Christine and Kanz, Lothar and Neubauer, Andreas and Kneba, Michael and Stegelmann, Frank and Pfreundschuh, Michael and Waller, Cornelius F. and Oppliger Leibundgut, Elisabeth and Heim, Dominik and Krause, Stefan W. and Hofmann, Wolf-Karsten and Hasford, Joerg and Pfirrmann, Markus and M{\"u}ller, Martin C. and Hochhaus, Andreas and Lauseker, Michael},
  title     = {Defining therapy goals for major molecular remission in chronic myeloid leukemia: results of the randomized CML Study IV},
  series = {Leukemia},
  volume    = {32},
  journal   = {Leukemia},
  number    = {5},
  doi       = {10.1038/s41375-018-0055-7},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-227528},
  pages     = {1222-1228},
  year      = {2018},
  abstract  = {Major molecular remission (MMR) is an important therapy goal in chronic myeloid leukemia (CML). So far, MMR is not a failure criterion according to ELN management recommendation leading to uncertainties when to change therapy in CML patients not reaching MMR after 12 months. At monthly landmarks, for different molecular remission status Hazard ratios (HR) were estimated for patients registered to CML study IV who were divided in a learning and a validation sample. The minimum HR for MMR was found at 2.5 years with 0.28 (compared to patients without remission). In the validation sample, a significant advantage for progression-free survival (PFS) for patients in MMR could be detected (p-value 0.007). The optimal time to predict PFS in patients with MMR could be validated in an independent sample at 2.5 years. With our model we provide a suggestion when to define lack of MMR as therapy failure and thus treatment change should be considered. The optimal response time for 1\% BCR-ABL at about 12-15 months was confirmed and for deep molecular remission no specific time point was detected. Nevertheless, it was demonstrated that the earlier the MMR is achieved the higher is the chance to attain deep molecular response later.},
  language  = {en}
}