On June 4, 2018 Euronext Paris: FR0010331421 – IPH) reported updated preliminary clinical data from an ongoing Phase I dose escalation and expansion study evaluating the safety and efficacy of the combination of monalizumab, a first-in-class monoclonal antibody targeting NK and T cell checkpoint receptor NKG2A, with durvalumab in patients with recurrent/metastatic microsatellite-stable colorectal cancer (MSS-CRC) (Press release, Innate Pharma, JUN 4, 2018, View Source [SID1234527252]). This trial is being conducted by MedImmune, AstraZeneca’s global biologics research and development arm, through a co-development and commercialization agreement.
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In a poster presentation made at the Gastrointestinal (Colorectal) Cancer session on Sunday, June 3 2018, during the annual meeting of the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper), the combination of monalizumab and durvalumab showed encouraging anti-tumor activity in this difficult-to-treat patient subset.
"The preliminary data so far suggest that the combination of monalizumab and durvalumab may hold promise in some patients with MSS-CRC, a population historically unresponsive to PD-1/L1 therapy", said study investigator Neil H. Segal, MD., PhD., medical oncologist at Memorial Sloan Kettering Cancer Center, New York.
Pierre Dodion, Chief Medical Officer at Innate Pharma, added: "We are encouraged by the preliminary results from the ongoing trial observed in a heavily pretreated MSS-CRC patient population. These data have prompted our partner AstraZeneca/MedImmune to further expand the study with additional patient cohorts to explore the novel combination of this first-in-class antibody, monalizumab, with durvalumab on top of current standard of care therapies in patients with less heavily pretreated disease".
Key findings from the MSS-CRC expansion cohort:
Updated preliminary clinical data on the expansion cohort of microsatellite-stable colorectal cancer patients (MSS-CRC) presented at ASCO (Free ASCO Whitepaper) are based on the cut-off date of April 23, 2018. Forty patients are evaluable for safety and 39, for efficacy. Thirty five (88%) patients had 2 or more prior lines of therapy for recurrent/metastatic disease. Efficacy data show an overall response rate (ORR) of 8%, with confirmed partial response in 3 patients (8%) and stable disease (SD) in 11 patients (28%), including 3 SD patients with tumor reduction who continued therapy for >200 days. The median duration of response was 16.1 weeks at the cut-off date. Data demonstrated a disease control rate (DCR) of 31% at 16 weeks.