The company has announced positive results from their Phase III ASCEND trial of Calquence (acalabrutinib) in previously-treated patients with chronic lymphocytic leukaemia (CLL).
Results showed a statistically-significant and clinically-meaningful improvement in progression-free survival (PFS) with Calquence monotherapy compared to a combination regimen of rituximab plus physician’s choice of idelalisib or bendamustine. Importantly, the safety and tolerability of Calquence was consistent with the known profile.
“Calquence is the first BTK inhibitor to show benefit in a Phase III trial as a monotherapy compared to current standard-of-care combinations used in relapsed or refractory chronic lymphocytic leukaemia. We look forward to presenting detailed results at a forthcoming medical meeting,” says José Baselga, Executive Vice President, R&D Oncology, AstraZeneca.
Within AstraZeneca’s development programme for Calquence, ASCEND is the first of two Phase III CLL trials expected to read out in 2019. The second is ELEVATE-TN (ACE-CL-007) in treatment-naïve, front-line CLL. Calquence is currently approved for the treatment of adults with relapsed or refractorymantle cell lymphoma (MCL) in the US, Brazil, the UAE, and Qatar, and is being developed for the treatment of CLL and other blood cancers.
ASCEND (ACE-CL-309) is a global, randomised, multicentre, open-label Phase III trial evaluating the efficacy of Calquencein previously-treated patients with CLL. In the trial, 310 patients were randomised (1:1) into two groups. Patients in the first group received Calquencemonotherapy (100mg twice daily until disease progression). Patients in the second group received rituximab plus physician’s choice of idelalisib or bendamustine.1
The primary endpoint is PFS assessed by an independent review committee (IRC), and key secondary endpoints include physician-assessed PFS, IRC- and physician-assessed overall response rate and duration of response, as well as overall survival, patient reported outcomes and time to next treatment (TTNT).1
Calquence (acalabrutinib) was granted accelerated approval by the US Food and Drug Administration (FDA) in October 2017 for the treatment of adult patients with MCL who have received at least one prior therapy. Continued approval for this indication may be contingent upon verification and description of clinical benefit in confirmatory trials.
Calquenceis an inhibitor of Bruton tyrosine kinase (BTK). Calquencebinds covalently to BTK, thereby inhibiting its activity2. In B-cells, BTK signalling results in activation of pathways necessary for B-cell proliferation, trafficking, chemotaxis, and adhesion.
As part of an extensive clinical development programme, AstraZeneca and Acerta Pharma are currently evaluating Calquence in 26 clinical trials that are company-sponsored. Calquence is being developed for the treatment of multiple B-cell blood cancers including CLL, MCL, diffuse large B-cell lymphoma, Waldenstrom macroglobulinaemia, follicular lymphoma, and multiple myeloma and other haematologic malignancies. Several Phase III clinical trials in CLL are ongoing, including ASCEND, ELEVATE-TN, ELEVATE-RR (ACE-CL-006) evaluating Calquencevs. ibrutinib in previously-treated CLL and ACE-CL-311 evaluating Calquence in combination with venetoclax and obinutuzumab in previously-untreated fit patients with CLL.