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Weekes CD, Rosen LS, Capasso A, Wong KM, Ye W, Anderson M, McCall B, Fredrickson J, Wakshull E, Eppler S, Shon-Nguyen Q, Desai R, Huseni M, Hegde PS, Pourmohamad T, Rhee I, Bessudo A. Phase I study of the anti-α5β1 monoclonal antibody MINT1526A with or without bevacizumab in patients with advanced solid tumors. Cancer Chemother Pharmacol 2018; 82:339-351. [PMID: 29905898 DOI: 10.1007/s00280-018-3622-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/08/2018] [Indexed: 02/05/2023]
Abstract
PURPOSE MINT1526A is a monoclonal antibody that blocks the interaction of integrin alpha 5 beta 1 (α5β1) with its extracellular matrix ligands. This phase I study evaluated the safety and pharmacokinetics of MINT1526A with or without bevacizumab in patients with advanced solid tumors. METHODS MINT1526A was administered every 3 weeks (Q3W) as monotherapy (arm 1) or in combination with bevacizumab 15 mg/kg, Q3W (arm 2). Each arm included a 3 + 3 dose-escalation stage and a dose-expansion stage. RESULTS Twenty-four patients were enrolled in arm 1 (dose range 2-30 mg/kg) and 30 patients were enrolled in arm 2 (dose range 3-15 mg/kg). Monocyte α5β1 receptor occupancy was saturated at a dose of 15 mg/kg. No dose-limiting toxicities were observed, and the maximum tolerated dose was not reached in either arm. The most common adverse events, regardless of causality, included abdominal pain (25%), diarrhea (25%), nausea (21%), vomiting (21%), and fatigue (21%) in arm 1 and nausea (40%), fatigue (33%), vomiting (30%), dehydration (30%), headache (30%), and hypertension (30%) in arm 2. No grade ≥ 3 bleeding events were observed in either arm. No confirmed partial responses (PR) were observed in arm 1. In arm 2, one patient with thymic carcinoma experienced a confirmed PR and two patients with hepatocellular carcinoma (HCC) experienced durable minor radiographic responses. CONCLUSIONS MINT1526A, with or without bevacizumab, was well-tolerated. Preliminary evidence of combination efficacy, including in patients with HCC, was observed, but cannot be distinguished from bevacizumab monotherapy in this phase I study.
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Affiliation(s)
- Colin D Weekes
- Division of Hematology/Oncology, Massachusetts General Hospital, 55 Fruit St, Yawkey 7E, Boston, MA, 02114, USA.
| | - Lee S Rosen
- Division of Hematology-Oncology, University of California-Los Angeles, Santa Monica, CA, USA
| | - Anna Capasso
- Division of Medical Oncology, University of Colorado School of Medicine and Developmental Therapeutics Program, University of Colorado Cancer Center, Aurora, CO, USA
| | - Kit Man Wong
- Division of Medical Oncology, University of Washington School of Medicine, Seattle, WA, USA
| | - Weilan Ye
- Genentech, Inc., South San Francisco, CA, USA
| | | | | | | | | | | | | | - Rupal Desai
- Genentech, Inc., South San Francisco, CA, USA
| | | | | | | | - Ina Rhee
- Genentech, Inc., South San Francisco, CA, USA
| | - Alberto Bessudo
- California Cancer Associates for Research & Excellence, Encinitas, CA, USA
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