期刊
BLOOD ADVANCES
卷 6, 期 11, 页码 3440-3450出版社
ELSEVIER
DOI: 10.1182/bloodadvances.2021006434
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资金
- Pharmacyclics LLC, an AbbVie Company
This study reports long-term follow-up data from the RESONATE-2 phase 3 study of ibrutinib in previously untreated CLL patients. The results show that ibrutinib provides sustained benefit in terms of progression-free survival and overall survival, even in patients with high-risk genomic features.
We report long-term follow-up from the RESONATE-2 phase 3 study of the once-daily Bruton's tyrosine kinase inhibitor ibrutinib, which is the only targeted therapy with significant progression-free survival (PFS) and overall survival (OS) benefit in multiple randomized chronic lymphocytic leukemia (CLL) studies. Patients (>_65 years) with previously untreated CLL, without del(17p), were randomly assigned 1:1 to once-daily ibrutinib 420 mg until disease progression/unacceptable toxicity (n = 136) or chlorambucil 0.5-0.8 mg/kg #12 cycles (n = 133). With up to 8 years of follow-up (range, 0.1-96.6 months; median, 82.7 months), significant PFS benefit was sustained for ibrutinib vs chlorambucil (hazard ratio [HR], 0.154; 95% confidence interval [CI], 0.108-0.220). At 7 years, PFS was 59% for ibrutinib vs 9% for chlorambucil. PFS benefit was also observed for ibrutinib-vs chlorambucil-randomized patients with high-risk genomic features: del(11q) (HR, 0.033; 95% CI, 0.010-0.107) or unmutated immunoglobulin heavy chain variable region (HR, 0.112; 95% CI, 0.065-0.192). OS at 7 years was 78% with ibrutinib. Prevalence of adverse events (AEs) was consistent with previous 5-year follow-up. Ibrutinib dosing was held (>_7 days) for 79 patients and reduced for 31 patients because of AEs; these AEs resolved or improved in 85% (67 of 79) and 90% (28 of 31) of patients, respectively. With up to 8 years of follow-up, 42% of patients remain on ibrutinib. Long-term RESONATE-2 data demonstrate sustained benefit with first-line ibrutinib treatment for CLL, including for patients with high-risk genomic features. These trials were registered at www.clinicaltrials.gov as #NCT01722487 and #NCT01724346.
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