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Abdelmagid MG, Al-Kali A, Litzow MR, Begna KH, Hogan WJ, Patnaik MS, Hashmi SK, Elliott MA, Alkhateeb H, Karrar OS, Fleti F, Elnayir MH, Rivera CE, Murthy HS, Foran JM, Kharfan-Dabaja MA, Badar T, Viswanatha DS, Reichard KK, Gangat N, Tefferi A. Real-world experience with ponatinib therapy in chronic phase chronic myeloid leukemia: impact of depth of response on survival and prior exposure to nilotinib on arterial occlusive events. Blood Cancer J 2023; 13:122. [PMID: 37567878 PMCID: PMC10421909 DOI: 10.1038/s41408-023-00891-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/11/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023] Open
Abstract
We surveyed the performance of ponatinib, as salvage therapy, in a real-world setting of chronic phase chronic myeloid leukemia (CML-CP). Among 55 consecutive patients (median age 49 years) with relapsed/refractory CML-CP, 35 (64%) had failed ≥3 tyrosine kinase inhibitors (TKIs), 35 (64%) were pre-treated with nilotinib, and 14 (28%) harbored ABL1T315I. At start of ponatinib (median dose 30 mg/day), 40 patients were already in complete hematologic (CHR), 4 in complete cytogenetic (CCyR), 3 in major molecular (MMR) remission, while 8 had not achieved CHR (NR). Ponatinib improved the depth of response in 13 (33%), 3 (75%), 2 (66%), and 4 (50%) patients with CHR, CCyR, MMR, and NR, respectively (p = 0.02). At a median follow-up of 42 months, 13 (23%) deaths, 5 (9%) blast transformations, and 25 (45%) allogeneic transplants were recorded. Five/10-year post-ponatinib survival was 77%/58% with no significant difference when patients were stratified by allogeneic transplant (p = 0.94), ponatinib-induced deeper response (p = 0.28), or a post-ponatinib ≥CCyR vs CHR remission state (p = 0.25). ABL1T315I was detrimental to survival (p = 0.04) but did not appear to affect response. Prior exposure to nilotinib was associated with higher risk of arterial occlusive events (AOEs; 11% vs 0%; age-adjusted p = 0.04). Ponatinib starting/maintenance dose (45 vs 15 mg/day) did not influence either treatment response or AOEs. Our observations support the use of a lower starting/maintenance dose for ponatinib in relapsed/refractory CML-CP but a survival advantage for deeper responses was not apparent and treatment might not overcome the detrimental impact of ABL1T315I on survival. The association between prior exposure to nilotinib and a higher risk of post-ponatinib AOEs requires further validation.
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Affiliation(s)
| | - Aref Al-Kali
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Mark R Litzow
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | | | | | | | | | | | | | - Omer S Karrar
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | - Farah Fleti
- Division of Hematology, Mayo Clinic, Rochester, MN, USA
| | | | | | | | - James M Foran
- Division of Hematology, Mayo Clinic, Jacksonville, FL, USA
| | | | - Talha Badar
- Division of Hematology, Mayo Clinic, Jacksonville, FL, USA
| | - David S Viswanatha
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Kaaren K Reichard
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | | | - Ayalew Tefferi
- Division of Hematology, Mayo Clinic, Rochester, MN, USA.
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Tefferi A, Begna KH, McCullough KB. Tyrosine kinase inhibitors dosing for chronic phase chronic myeloid leukemia: The case for starting low with dasatinib (50 mg/day) and ponatinib (15 mg/day). Am J Hematol 2022; 97:1394-1397. [PMID: 35996356 DOI: 10.1002/ajh.26695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 01/28/2023]
Affiliation(s)
- Ayalew Tefferi
- Division of Hematology, Mayo Clinic, Rochester, Minnesota, USA
| | - Kebede H Begna
- Division of Hematology, Mayo Clinic, Rochester, Minnesota, USA
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