A Phase 1b/2 Study of the Anti-CD47 Antibody Magrolimab with Cetuximab in Patients with Colorectal Cancer and Other Solid Tumors.

IF 4.4 3区医学 Q2 ONCOLOGY

Targeted Oncology Pub Date : 2025-03-26 DOI:10.1007/s11523-025-01130-y

Cathy Eng, Nehal J Lakhani, Philip A Philip, Charles Schneider, Benny Johnson, Adel Kardosh, Mark P Chao, Amita Patnaik, Fadi Shihadeh, Yeonju Lee, Kai Song, Denise Jin, Yanan Huo, Michael Howland, George A Fisher, J Randolph Hecht

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引用次数: 0

Abstract

Background: Chemotherapy plus epidermal growth factor receptor (EGFR) inhibitors, such as cetuximab, is standard therapy for KRAS wild-type (KRASwt) colorectal cancer (CRC); however, responses are infrequent. Magrolimab is a monoclonal antibody targeting CD47, an antiphagocytic signal overexpressed in solid tumors (STs).

Objective: This open-label, multicenter phase 1b/2 study (NCT02953782) aimed to determine the recommended phase 2 dose (RP2D) and evaluate the safety, tolerability, and efficacy of magrolimab + cetuximab in patients with advanced CRC or other STs.

Patients and methods: A total of 78 patients were enrolled at eight study sites in the USA. In phase 1b, patients with advanced STs received weekly maintenance doses of magrolimab at 10-45 mg/kg and cetuximab at 200-250 mg/m² following 3 + 3 dose-escalation. In phase 2, patients with anti-EGFR-refractory CRC received magrolimab + cetuximab at RP2Ds. Primary endpoints were dose-limiting toxicities, adverse events, and objective response rate (ORR; phase 2).

Results: The maximum tolerated dose was not reached in phase 1b. Two RP2Ds were explored in phase 2: magrolimab at 30 or 45 mg/kg plus cetuximab at 250 mg/m². Most common treatment-related adverse events (TRAEs) were dermatitis acneiform (35.9%), infusion-related reactions (33.3%), dry skin (32.1%), fatigue (32.1%), and headache (29.5%). Most common grade ≥ 3 TRAEs were anemia (11.5%), increased blood bilirubin (9.0%), and decreased lymphocyte count (9.0%). Discontinuation of any study treatment owing to TRAEs occurred in 3.8% of patients. No deaths occurred due to TRAEs. In phase 2, ORR was 6.3% and 0% in the KRASwt and KRASmt CRC cohorts, respectively; disease control rate was 50.0% and 38.1%, and median overall survival was 9.5 and 7.6 months, respectively.

Conclusions: These results indicate tolerability and potential antitumor activity when combining anti-CD47 therapy and cetuximab in heavily pretreated patients with CRC.

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来源期刊

Targeted Oncology 医学-肿瘤学

CiteScore

8.40

自引率

3.70%

发文量

审稿时长

>12 weeks

期刊介绍： Targeted Oncology addresses physicians and scientists committed to oncology and cancer research by providing a programme of articles on molecularly targeted pharmacotherapy in oncology. The journal includes: Original Research Articles on all aspects of molecularly targeted agents for the treatment of cancer, including immune checkpoint inhibitors and related approaches. Comprehensive narrative Review Articles and shorter Leading Articles discussing relevant clinically established as well as emerging agents and pathways. Current Opinion articles that place interesting areas in perspective. Therapy in Practice articles that provide a guide to the optimum management of a condition and highlight practical, clinically relevant considerations and recommendations. Systematic Reviews that use explicit, systematic methods as outlined by the PRISMA statement. Adis Drug Reviews of the properties and place in therapy of both newer and established targeted drugs in oncology.