Acute lymphoblastic leukemia (ALL) is the most frequent cancer in children, decreases in adolescence and adulthood, and a second peak can be recorded starting from the 6th decade of life. While the outcome in children is excellent, in the adolescent/adult population, the prognosis, though improved over the decades, it is still unsatisfactory and novel biologically-driven approaches are urgently needed. In this setting, thanks to the introduction of genome wide technologies, it was possible to recognize specific subset of ALL. Among those, the BCR/ABL1-like ALL are of extreme importance, since they are characterized by an unfavourable outcome and, on the other hand, can benefit of a targeted treatment, in particular with the pan-tyrosine kinase inhibitor ponatinib. The primary objective is to evaluate the clinical response - in terms of MRD negativity - in patients with a BCR/ABL1-like profile, according to the BCR/ABL1-like predictor tool, treated with Ponatinib in combination with chemotherapy.
This is an interventional, phase II study, foreseeing a run-in phase for adult BCR/ABL1-like ALL patients. Thirty-two newly-diagnosed B-lineage ALL cases with a BCR/ABL1-like profile will be treated (≥18 years old, up to the age of 65 years). This implies that about 100-120 B-lineage ALL patients negative at the conventional molecular screening (BCR/ABL1, ALL1/AF4, E2A/PBX1) will undergo the recently reported "BCR/ABL1 predictor" (13). The estimated timing for both the conventional and the BCR/ABL1-like screening is within the steroid pre-phase (7 days). After a steroid pre-treatment phase (prednisone: 60 mg/m2/day, day -6 up to day 0), that can occurr before enrollment during the screening period, patients who prove BCR/ABL1-like will be treated with Ponatinib in combination with a pediatric-inspired and minimal residual disease (MRD)-driven treatment scheme - as in the previous GIMEMA LAL1913 protocol (EudraCT number 2009-016075-30) -, for the first 2 cycles (C1 and C2). In order to avoid toxicity, namely thrombotic, pancreatic and hepatic events, Asparaginase will be omitted from this scheme. As for the run-in phase, patients will receive ponatinib at the dosage of 15 mg. If no relevant toxicities are observed (i.e. 2 distinct patients developing a Grade IV non hematologic toxicity related to ponatinib within the first cycle of induction, 28 days), Ponatinib will be administered at the dose of 30 mg in the remaining patients. MRD will be evaluated at week 4, 10, 16, and 22. If a donor is available (MUD and haploidentical donors allowed, HLA typing carried out as soon as possible), MRD-positive patients will proceed to an allogeneic transplant after cycle 3; otherwise, if no donor is available, they will continue treatment with 5 additional consolidation/reinduction blocks, followed by 24 28-day cycles of maintenance, as detaield in the treatment scheme. If beneficial for the patients, ponatinib will be provided until disease progression. CNS prophylaxis will be carried out throughout the course of treatment with 12 medicated rachicenteses (Methotrexate 12.5 mg, Aracytin 50 mg, Urbason 20 mg).
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
32
Ponatinib is a novel, synthetic, orally-active TKI discovered using a computational and structure based drug design approach. Ponatinib was specifically designed to inhibit all clinically relevant variants of BCR-ABL1, including the T315I mutant (15-17). In vitro assays have demonstrated that Ponatinib potently inhibits the kinase enzymatic activity of the T315I ABL kinase domain, as well as that of the native (unmutated) enzyme. In leukemia cell lines expressing these BCR-ABL1 variants, Ponatinib potently inhibited BCR-ABL1 signaling, leading to the reduction of cellular proliferation and induction of apoptosis. Ponatinib also inhibits the proliferation of cell lines expressing other major clinically-observed Imatinib-resistant mutants of BCR-ABL1.
Ematologia con Unità di Trapianto
Avellino, AV, Italy
RECRUITINGEmatologia Presidio Ospedaliero Tortora
Pagani, SA, Italy
RECRUITINGEmatologia ASST Papa Giovanni XXIII
Bergamo, Italy
RECRUITINGEmatologia AOU S.ORSOLA-MALPIGHI
Bologna, Italy
RECRUITINGEmatologia ASST Spedali Civili
Brescia, Italy
RECRUITINGEmatologia AOU Policlinico Vittorio Emanuele-Ferrarotto
Catania, Italy
RECRUITINGEmatologia AOU Careggi
Florence, Italy
RECRUITINGEmatologia Ospedale V.Fazzi
Lecce, Italy
RECRUITINGEmatologia Ospedale dell'Angelo
Mestre, Italy
RECRUITINGEmatologia Ospedale Maggiore Policlinico
Milan, Italy
RECRUITING...and 14 more locations
MRD Negativity Rate after 3 cycles (TP2) in patients with BCR/ABL1-like ALL treated with a Ponatinib plus chemotherapy approach
The primary outcome is to evaluate the clinical response - in terms of MRD negativity - in patients with a BCR/ABL1-like profile, according to the BCR/ABL1-like predictor tool, treated with Ponatinib in combination with chemotherapy
Time frame: 3 months
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