Prediction of sustained remission after tyrosine kinase inhibitor discontinuation with BCR::ABL1 digital PCR in chronic myeloid leukemia patients
Precise and reliable predictive parameters to accurately identify chronic myeloid leukemia (CML) patients who can successfully discontinue their tyrosine kinase inhibitor (TKI) treatment are lacking. One promising parameter is depth of molecular response measured by BCR::ABL1 digital PCR (dPCR). The...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
November 2024
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| In: |
European journal of haematology
Year: 2024, Volume: 113, Issue: 5, Pages: 606-613 |
| ISSN: | 1600-0609 |
| DOI: | 10.1111/ejh.14271 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1111/ejh.14271 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/ejh.14271 
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| Author Notes: | Camille Kockerols, Peter J.M. Valk, Jeroen J.W.M. Janssen, Pauline Hogenbirk, Jan J. Cornelissen, Susanne Saussele, Birgit Spiess, Maria Agustina Perusini, Dennis Kim, Peter E. Westerweel |
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| 245 | 1 | 0 | |a Prediction of sustained remission after tyrosine kinase inhibitor discontinuation with BCR::ABL1 digital PCR in chronic myeloid leukemia patients |c Camille Kockerols, Peter J.M. Valk, Jeroen J.W.M. Janssen, Pauline Hogenbirk, Jan J. Cornelissen, Susanne Saussele, Birgit Spiess, Maria Agustina Perusini, Dennis Kim, Peter E. Westerweel |
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| 520 | |a Precise and reliable predictive parameters to accurately identify chronic myeloid leukemia (CML) patients who can successfully discontinue their tyrosine kinase inhibitor (TKI) treatment are lacking. One promising parameter is depth of molecular response measured by BCR::ABL1 digital PCR (dPCR). The aim of this study was to validate a previously described prediction cutoff of 0.0023%IS and to assess the value of dPCR for treatment-free remission (TFR) prediction in relation to other clinical parameters. A droplet-based dPCR assay assessed BCR::ABL1 %IS prior to TKI discontinuation. The primary endpoint was molecular recurrence (MolR) by 36 months. A total of 186 patients from Canada, Germany, and the Netherlands were included. In patients with a first TKI discontinuation attempt (n = 163), a BCR::ABL1 dPCR < and ≥0.0023%IS had a MolR probability of 33% and 70%, respectively. Patients treated less than 6 years with a BCR::ABL1 dPCR <0.0023%IS had a MolR probability of 31%. After correction for treatment duration, both high dPCR value and the use of imatinib (vs. second-generation TKI) were significantly associated with a higher risk of MolR (HR of 3.66, 95%CI 2.06-6.51, p < .001; and 2.85, 95%CI 1.25-6.46, p = .013, respectively). BCR::ABL1 dPCR was not associated with TFR outcome after second TKI discontinuation, however, with the limitation of a small number of patients analyzed (n = 23). In conclusion, BCR::ABL1 digital PCR based on the cutoff of 0.0023%IS is a valuable predictive tool to identify CML patients with a high probability of TFR success after first TKI discontinuation, including patients treated for less than 6 years. | ||
| 650 | 4 | |a BCR::ABL1 digital PCR | |
| 650 | 4 | |a chronic myeloid leukemia | |
| 650 | 4 | |a treatment-free remission | |
| 650 | 4 | |a tyrosine kinase inhibitor discontinuation | |
| 700 | 1 | |a Valk, Peter J. M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Janssen, Jeroen J. W. M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hogenbirk, Pauline |e VerfasserIn |4 aut | |
| 700 | 1 | |a Cornelissen, Jan J. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Kim, Dennis |e VerfasserIn |4 aut | |
| 700 | 1 | |a Westerweel, Peter E. |e VerfasserIn |4 aut | |
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