Phase III ASCEND trial of Calquence shows PFS improvement in chronic lymphocytic leukaemia

AstraZeneca announced positive results from the 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.

ASCEND (ACE-CL-309) is a global, randomised, multicentre, open-label Phase III trial in which 310 patients were randomised (1:1) into two groups. Patients in the first group received Calquence monotherapy (100mg twice daily until disease progression). Patients in the second group received rituximab plus physician’s choice of idelalisib or bendamustine. 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).

Comment: 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 refractory mantle cell lymphoma (MCL) in the US, Brazil, the UAE, and Qatar, and is being developed for the treatment of CLL and other blood cancers.