Amgen Highlights The Versatility Of The BiTE® Immuno-Oncology Platform In Multiple Tumor Types At ASCO 2019
"Our BiTE immuno-oncology platform offers unique versatility, with the potential to treat various tumors through targeting tumor-associated antigens," said
ASCO Annual Meeting Abstract #8007: Evaluation of AMG 420, An Anti-BCMA Bispecific T Cell Engager (BiTE) Immunotherapy, In R/R Multiple Myeloma (MM) Patients: Updated Results of a First-in-Human (FIH) Phase 1 Dose-Escalation Study
Updated results from a Phase 1, first-in-human dose-escalation trial of investigational AMG 420, a B-cell maturation antigen (BCMA)-targeting BiTE molecule, in patients with R/R MM were shared during an oral presentation at the ASCO Annual Meeting. This abstract was also selected for inclusion in the Best of ASCO® educational program. The objectives of the study included assessment of the safety, tolerability and anti-tumor activity of AMG 420 per
As of the latest readout, AMG 420 induced clinical responses in 13 of 42 patients across the dosing cohorts. Of the six patients that achieved a minimal residual disease (MRD)-negative complete response (CR), five were treated at the 400 µg/d dose. In addition, at the 400 µg/d dose, one patient achieved a very good partial response, and one achieved a partial response. The overall response rate at 400 µg/d was 70 percent (7/10). The median duration of response was nine months (range 5.8-13.6 months). Median time to response was one month, with 11 of 13 patients responding in the first cycle.
Serious adverse events (AEs) were reported in 19 patients (45 percent). Sixteen required hospitalization and four had prolonged hospitalization. No grade 3 or 4 central nervous system toxicities were observed. Serious AEs occurring in more than one patient included infections (n=13) and peripheral polyneuropathy (n=2). Treatment-related serious AEs included polyneuropathy (n=2, both grade 3) and edema (n=1, grade 3). Grade 3 cytokine release syndrome (CRS) was seen in one patient. Two patients died during the study from AEs not considered treatment-related: one patient died from acute respiratory distress due to concurrent flu and aspergillosis, and the second patient died from liver failure secondary to a viral infection during the course of treatment.
"These updated results presented at the ASCO Annual Meeting showed that AMG 420 at the 400 µg/d dose was efficacious with no new safety concerns in heavily pre-treated patients with relapsed and/or refractory multiple myeloma," said
Initial results from a Phase 1 dose-escalation study of investigational AMG 212 (pasotuxizumab, formerly known as BAY 2010112), in patients with mCRPC who are refractory to standard therapy were presented in a poster at the ASCO Annual Meeting. AMG 212 is an investigational BiTE molecule which is designed to target prostate-specific membrane antigen (PSMA), a promising target in mCRPC. In the trial, 16 patients with mCRPC were enrolled into five dosing cohorts, with a target dose range of 5 to 80 µg/d delivered by continuous intravenous infusion. The primary objective was to determine safety and MTD and secondary objectives included pharmacokinetics (PK), biomarkers and tumor response. Antitumor activity as indicated by decline in serum level of prostate-specific antigen (
"Metastatic castrate-resistant prostate cancer is considered a heterogenous disease and despite advances made over the last few years, the majority of patients face a poor outlook1," said
The most common drug-related AEs were fever (94 percent, n=15) and chills (69 percent, n=11). A drug-related serious AE (fatigue) was reported in one patient. CRS was reported for three patients (19 percent); two were grade 2 and one was grade 3. No grade 5 AEs occurred.
Additional Updates on
During poster sessions, researchers shared information on the studies of AMG 596, an investigational BiTE molecule targeting epidermal growth factor receptor variant III (EGFRvIII) in glioblastoma (GBM), and AMG 757, an investigational BiTE molecule targeting delta-like ligand 3 (DLL3) in small-cell lung cancer (SCLC). GBM and SCLC are both aggressive and difficult-to-treat forms of cancer where there is a significant unmet medical need for patients.
Forty-three percent of GBM tumors test positive for amplification or mutation of the EGFR, the most common of which is the EGFRvIII gain-of-function mutation.2 A Phase 1, first-in-human, open-label, sequential dose-escalation and dose-expansion study is ongoing for investigational AMG 596, evaluating its safety, tolerability, and PK and pharmacodynamics in patients with EGFRvIII-postive glioblastoma. The study is expected to enroll 82 patients in two groups: one with recurrent GBM and a second in newly diagnosed patients in the maintenance treatment phase following standard of care treatment.
DLL3 is an inhibitory ligand of notch receptors that is expressed in most SCLC tumors but minimally expressed in normal tissues.3 An ongoing open-label, ascending, multiple-dose, Phase 1 study is evaluating investigational AMG 757 in adult patients with SCLC which has progressed or recurred after at least one platinum-based chemotherapy regimen. Primary objectives are to evaluate safety and tolerability and to determine the MTD or recommended Phase 2 dose. Secondary objectives are to characterize PK and evaluate preliminary anti-tumor activity.
For more information on these and other ongoing clinical trials, visit www.AmgenTrials.com.
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About BiTE® Technology
BiTE® (Bispecific T cell engager) technology is a targeted immuno-oncology platform that is designed to engage patients' own T cells to any tumor-specific antigen, activating the cytotoxic potential of T cells with the goal of eliminating detectable cancer. The BiTE immuno-oncology platform has the potential to treat different tumor types through tumor-specific antigens. The BiTE platform has the goal of off-the-shelf solutions, which have the potential to make innovative T cell treatment available to all providers when their patients need it.
About Amgen Oncology
Amgen Oncology is searching for and finding answers to incredibly complex questions that will advance care and improve lives for cancer patients and their families. Our research drives us to understand the disease in the context of the patient's life – not just their cancer journey – so they can take control of their lives.
For the last four decades, we have been dedicated to discovering the firsts that matter in oncology and to finding ways to reduce the burden of cancer. Building on our heritage,
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- Moreira DM, Howard LE, Sourbeer KN, et al. Predicting time from metastasis to overall survival in castration-resistant prostate cancer: Results from SEARCH. Clin Genitourin Cancer. 2017;15(1):60–66.
- Westphal M, Maire CL, Lamszus K. EGFR as a target for glioblastoma treatment: An unfulfilled promise. CNS Drugs. 2017;31(9):723-735.
- Saunders LR, Bankovich AJ, Anderson WC, et al. A DLL3-targeted antibody-drug conjugate eradicates high-grade pulmonary neuroendocrine tumor-initiating cells in vivo. Sci Transl Med. 2015;7(302):1-13
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