Affimed presents data from AFM24-102 Phase 1/2a combination study

Affimed announced interim safety and efficacy data on its innate cell engager AFM24 from the ongoing AFM24-102 combination study with atezolizumab, an anti-PD-L1 checkpoint inhibitor, in patients with advanced EGFR-expressing solid tumors. The data update as of December 6th, 2023, includes 15 patients from the EGFR-wildtype NSCLC cohort with a median of 2 prior lines of therapy. Importantly, all patients were pretreated with and ultimately progressed while on PD-(L)1 targeting therapy. The combination of AFM24 with atezolizumab showed encouraging signals of clinical activity, including 1 unconfirmed CR, 3 PRs and 7 patients exhibiting SD. All eleven patients with a confirmed response, unconfirmed response or stable disease are continuing treatment, with 4 patients exceeding 3 months of therapy; 2 patients improved from SD at the first scan to PR at the second scan based on RECIST criteria. Affimed’s ICE AFM24, in combination with atezolizumab, has the potential to reactivate the innate and consequently the adaptive immune system to recognize and destroy EGFR-positive NSCLC tumors. Considering the low ORR reported on atezolizumab monotherapy in checkpoint inhibitor-relapsing and refractory patients, Affimed believes the clinical activity observed in AFM24-102 is likely due to the synergy of AFM24 with atezolizumab. AFM24 has demonstrated a positive safety and tolerability profile as both a monotherapy and in combination therapy. The combination with atezolizumab has not led to unexpected toxicity, and the toxicity observed to date is in line with the toxicity profile of the individual agents alone. The majority of patients experienced only mild to moderate treatment-related adverse events. Affimed also announced that it has discontinued enrollment in AFM24-102 into the gastric cancer cohort and the basket cohort evaluating pancreatic cancer, biliary tract cancer and hepatocellular carcinoma. While clinical activity was observed in both cohorts, neither cohort is likely to achieve response rates that would meet the Company’s efficacy hurdle and the Company’s strategic focus is to advance the NSCLC program as fast as possible.