Study Phase III Randomized Study to Investigate the Use of Acalabrutinib in the Treatment of Patients with Early Stage CLL With High Risk of Early Disease Progression.
The study will consist of a screening phase, a treat¬ment/observation phase until progression, and a follow-up phase for progression in patients who discontinue treatment with Acalabrutinib without confirmed progression. Patients who progress will be followed for survival and initiation of subsequent antileukemic therapy. In the study, 130 patients from 20 centers in Spain with intermediate, high or very high risk will be randomized (1:1) to receive Acalabrutinib (n=65) or clinical observation (n=65). Acalabrutinib will be administered orally 100 mg twice daily on a continuous schedule.
Even though the majority of patients with CLL are currently diagnosed at early stages of the disease, there is a consensus that the standard of care in these patients is clinical observation (watch & wait) despite of the presence of risk factors for premature disease progression. Early treatment in patients with adverse prognostic parameters could prevent a disease evolving to a more advanced stage, and therefore more difficult to treat. So far, conventional chemotherapy did not show any benefit in terms of overall survival in patients with early stage CLL. (Dighiero 1998, Hoechstetter Leukemia 2017) Alongside this, treatment with chemotherapy may provoke two undesired effects: first, the occurrence of bone marrow toxicity that may hamper the subsequent administration of other treatments during the course of the disease; second, but not less relevant, genotoxic drug delivery may elicit a phenomenon of clonal selection leading to the appearance of CLL cells with genetic aberrations associated with refractoriness and aggressive outcome (i.e., TP53).
Against this background, it is of interest to investigate the role of new non-genotoxic drugs in the treatment of patients with CLL in early stages. Among different scores for selecting cases that are likely to progress rapidly, the German CLL Study Group (GCLLSG) risk score that includes 8 independent predictors for OS and PFS, differentiates patients with low-risk PFS vs. those with risk of early disease progression (median PFS 87 months vs. less than 27 months), allowing for a risk-adapted treatment approach in early stage CLL. (Pflug 2014, Langerbeins 2015).
Acalabrutinib, a second-generation, selective inhibitor of BTK, has shown substantial activity in patients with CLL. Acalabrutinib is a non-genotoxic drug active in cases with genetic lesions associated with chemorefratoriness and adverse outcome, including patients with alterations of TP53. Therefore, acalabrutinib represents a suitable compound for the treatment of patients with CLL in early stages with risk of early disease progression, including the high-risk CLL patient population with TP53 alterations.
Randomized, open-label, parallel-group, multicenter, phase III trial with two arms, one with acalabrutinib (Arm A) and the other with the standard of care for the management of early Binet stage A patients "clinical observation (watch & wait)" (Arm B) in patients with untreated early stage CLL and risk factors for early disease progression. Early risk of disease progression will be defined by the GCLLSG prognostic index: intermediate (3-5), high (6-10) or very high (11-14) risk scores are required to be included in the study. Randomization will be managed through an IRT system:
The enrolment period is estimated in 24 months. A treatment cycle is defined as lasting 28 days.
The duration of the study will be of 60 months from the inclusion of the first patient to the last patient has completed the last follow up visit.
Study visits will no longer be carried out for patients who have withdrawn their informed consent, have died or have been lost to follow-up.
2. Study drug - dosage and administration:
Acalabrutinib is orally administered and is suitable for formulating in capsules. Acalabrutinib will be supplied by ASTRAZENECA FARMACÉUTICA SPAIN, S.A., on behalf of the Sponsor, as hard gelatin capsules of 100 mg for oral administration. Acalabrutinib can be taken with or without food. As acalabrutinib is metabolized by CYP3A, subjects should be cautioned against using herbal remedies or dietary supplements (in particular, St John's wort, which is a potent CYP3A inducer). Otherwise, subjects should maintain a normal diet unless modifications are required to manage an AE such as diarrhea, nausea or vomiting.
3. Description of Procedures
Disease Evaluation: Objective response will be categorized as CR, CR with incomplete bone marrow recovery (CRi), nodular partial remission (nPR), partial response (PR), stable disease, or progressive disease-all based upon IWCLL criteria (Hallek 2018). Patients who achieve PR in all parameters except lymphocyte count will be considered a PR with lymphocytosis, for the purposes of the Protocol. CRs must be confirmed by bone marrow biopsy/aspirate.
Given the known mechanism of action of BCR-inhibiting agents, including acalabrutinib, and the treatment-related lymphocytosis frequently observed during treatment with acalabrutinib, isolated treatment-related lymphocytosis (in absence of other clinical, CT, or laboratory evidence of disease progression) will not be considered progressive disease. This approach is supported by the IWCLL guidelines (Hallek 2018).
5. Safety, Monitoring and Reporting: An adverse event (AE) is any untoward medical occurrence in a patient or clinical investigation subject administered a medicinal product and which does not necessarily have a causal relationship with the treatment. An AE can therefore be any unfavourable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product.
PETHEMA Foundation has delegated Pharmacovigilance functions to the Pharmacovigilance Department of the CRO Dynamic Science S.L.
6. Warnings, Precautions, and Adverse Effects: Acalabrutinib is contraindicated in subjects with clinically significant hypersensitivity to the compound itself or to the excipients in its formulation.
Hemorrhagic events, including CNS, respiratory, and gastrointestinal hemorrhage, have been reported in clinical trials with acalabrutinib. The mechanism for hemorrhage is not well understood.
Serious infections, including fatal events, have been reported in clinical studies with acalabrutinib. The most frequently reported Grade 3 or 4 infection was pneumonia. Cases of hepatitis B virus reactivation (resulting in liver failure and death in 1 case) and cases of progressive multifocal leukoencephalopathy have occurred in subjects with hematologic malignancies.
Cytopenias: treatment-emergent Grade 3 or 4 cytopenias including neutropenia, anemia, and thrombocytopenia have occurred in clinical studies with acalabrutinib.
Events of second primary malignancies, including non-skin carcinomas, have been reported in clinical studies with acalabrutinib. The most frequently reported was skin cancer.
Events of atrial fibrillation/flutter have been reported in clinical studies with acalabrutinib, particularly in subjects with cardiac risk factors, hypertension, diabetes mellitus, acute infections, and a previous history of atrial fibrillation. The mechanism for atrial fibrillation is not well understood.
Subjects should be managed per institutional guidelines with supportive care and diagnostic evaluations as clinically indicated.
7. Drug-drug Interactions: Acalabrutinib is partially metabolized by CYP3A; its exposure is affected when coadministered with strong CYP3A inducers or inhibitors. Consequently, the concomitant use of strong inhibitors/inducers of CYP3A should be avoided when possible. Subjects who require therapy with strong inhibitors of CYP3A should not be enrolled into the study.
Subjects should avoid the use of calcium carbonate containing drugs or supplements for a period of at least 2 hours before and 2 hours after taking acalabrutinib. Use of omeprazole, esomeprazole, lansoprazole or any other proton pump inhibitors while taking acalabrutinib is not recommended due to a potential decrease in study drug exposure. For subjects who require H2 antagonists, the recommendation is that acalabrutinib is taken at least 2 hours before the H2 antagonist.
8. Treatment-related lymphocytosis, for the purposes of this Protocol, is defined as an elevation in blood lymphocyte count of ≥50% compared to baseline. Acalabrutinib associated treatment-related lymphocytosis generally occurs within the first weeks of therapy, peaks within the first few months, and resolves slowly. Patients with treatment-related lymphocytosis should remain on study treatment and continue with all study-related procedures.
9. Once the complete study is explained, written Informed Consent will be obtained from the patient, legal guardian or representative before starting participation in the study.
10. In order to respect patient privacy, patients will be identified by patient number in all case report forms, study drug accountability logs, study reports and communications. Confidentiality of patients will be kept and their identity will not be disclosed as far as permitted by the law and relevant regulations. Regulation (EU) 2016/679 of the European Parliament and of the Council, of 27 April 2016, on the protection of natural persons with regard to the processing of personal data and the free movement of such data, and Organic Law 3/2018 of December 5, on the Protection or Personal Data and guarantee of digital rights.
11. Early study discontinuation: This study may be discontinued early if, in the Sponsor's opinion, there is sufficient reasonable cause.
12. Data registering and storage: The investigator will keep all study records in compliance with ICH-GCP requirements and current regulations.
13. Responsibility and insurance: The Sponsor has taken out an insurance policy covering, in its terms and conditions, the liability for damages caused to participants and derived from this research, performed fully in compliance with both the scientific Protocol and the applicable law and professional standards.
Condition | Chronic Lymphocytic Leukemia- Binet Staging System |
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Treatment | Acalabrutinib 100 MG Oral Capsule |
Clinical Study Identifier | NCT04178798 |
Sponsor | PETHEMA Foundation |
Last Modified on | 24 March 2022 |
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