Enoblituzumab (MGA271) in Children With B7-H3-expressing Solid Tumors
Study Details
Study Description
Brief Summary
This study is a Phase 1, open-label, dose escalation and cohort expansion trial designed to characterize the safety, tolerability, PK, PD, immunogenicity and preliminary antitumor activity of enoblituzumab administered IV on a weekly schedule for up to 96 doses (approximately 2 years) in children and young adults with B7-H3-expressing relapsed or refractory malignant solid tumors.
Condition or Disease | Intervention/Treatment | Phase |
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Phase 1 |
Detailed Description
This study is a Phase 1, open-label, dose escalation and cohort expansion trial designed to characterize the safety, tolerability, PK, PD, immunogenicity and preliminary antitumor activity of enoblituzumab administered IV on a weekly schedule for up to 96 doses (approximately 2 years) in children and young adults with B7-H3-expressing relapsed or refractory malignant solid tumors.
The study consists of a Dose Escalation Phase to determine the MTD (or MAD) of enoblituzumab followed by a Cohort Expansion Phase to further define the safety and initial antitumor activity of enoblituzumab. In the cohort expansion phase, 5 cohorts of 10 patients each will be enrolled to further evaluate the safety and potential efficacy of enoblituzumab administered at the MTD/MAD in patients with:1) neuroblastoma - measurable disease, 2) neuroblastoma - non-measurable disease, 3) rhabdomyosarcoma, 4) osteosarcoma, and 5) Ewing's sarcoma, Wilms' tumor, desmoplastic small round cell tumors, or malignant solid tumors of any other histology that test positive for B7-H3.
All tumor evaluations will be carried out by both Response Evaluation Criteria in Solid Tumors (RECIST) and immune-related response criteria (irRC). Disease assessment in patients with neuroblastoma will use neuroblastoma overall response criteria.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Experimental: Dose Escalation & Cohort Expansion enoblituzumab administered IV weekly |
Drug: Enoblituzumab
enoblituzumab administered IV weekly for up to 96 weeks
Other Names:
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Outcome Measures
Primary Outcome Measures
- Safety and tolerability of enoblituzumab. [Time of first dose through end of treatment (up to 2 years)]
Adverse events, SAEs, incidence of treatment-emergent AE
Secondary Outcome Measures
- Peak plasma concentration [Time of first dose through end of treatment (up to 96 weeks)]
PK of enoblituzumab
- Number of participants that develop anti-drug antibodies [Time of first dose through end of treatment (up to 96 weeks)]
Proportion of patients who develop anti-MGA271 antibodies, immunogenicity
- Antitumor activity of enoblituzumab [Time of first dose through end of treatment (up to 96 weeks)]
Anti-tumor activity of enoblituzumab using conventional RECIST 1.1 and immune related RECIST criteria
Eligibility Criteria
Criteria
General Inclusion Criteria:
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Age at treatment 1 to 35 years.
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Relapsed or refractory malignant solid tumors of any histology for which no standard curative therapy is available (escalation phase).
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Histologically proven: neuroblastoma, rhabdomyosarcoma, osteosarcoma, Ewing's sarcoma/ primitive neuroectodermal tumor, Wilms tumor, desmoplastic small round cell tumor or malignant solid tumors of any other histology that test positive for B7-H3 .
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Must have malignant solid tumors that demonstrate B7-H3 expression at 2+ or greater levels on the membranous surface of at least 10% of tumor cells or ≥ 25% of tumor vasculature by IHC.
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With the exception of patients with non-measurable neuroblastoma patients must have measurable disease as per RECIST 1.1
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Karnofsky (patients ≥ 16 years)/Lansky (patients < 16 years) index ≥ 70.
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Acceptable laboratory parameters and adequate organ reserve.
Exclusion Criteria:
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Patients are to be excluded from the study if they have any of the following:
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Patients with a history of symptomatic central nervous system (CNS) unless they have been treated and are asymptomatic.
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Patients with any history of known or suspected autoimmune disease with the specific exceptions of vitiligo, resolved childhood atopic dermatitis, psoriasis not requiring systemic treatment within the past 2 years, and patients with a history of Grave's disease that are now euthyroid clinically and by laboratory testing.
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History of prior allogeneic bone marrow/stem-cell or solid organ transplantation.
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Patients receiving autologous stem cell transplantation must wait 8 weeks before initiation of study drug administration.
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Treatment with systemic chemotherapy or investigational therapy within 4 weeks of first study drug administration; other agents (e.g., biologics) within 2 weeks; radiation within 2 weeks; patients receiving 131I-MIBG therapy must wait 6 weeks prior to the initiation of study drug administration; corticosteroids (≥ 0.2 mg/kg/day prednisone or equivalent) or other immune suppressive drugs within the 2 weeks prior to the initiation of study drug administration.
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History of clinically significant cardiovascular disease
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Active viral, bacterial, or systemic fungal infection requiring parenteral treatment within 7 days prior to the initiation of study drug.
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Known positive testing for human immunodeficiency virus or history of acquired immune deficiency syndrome.
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Known history of hepatitis B or hepatitis C infection or known positive test for hepatitis B surface antigen, hepatitis B core antigen, or hepatitis C polymerase chain reaction.
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Second primary invasive malignancy that has not been in remission for greater than 2 years.
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History of severe trauma or major surgery within 4 weeks prior to the initiation of study drug administration.
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Known hypersensitivity to recombinant proteins, polysorbate 80 or any excipient contained in the drug formulation for enoblituzumab
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Patients in Canada may not have a history or evidence of latent or active tuberculosis infection.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Lucile Packard Children's Hospital, Stanford | Palo Alto | California | United States | 94304 |
2 | National Cancer Institute, Center for Cancer Research | Bethesda | Maryland | United States | 20892 |
3 | Children's Hospital of Philadelphia | Philadelphia | Pennsylvania | United States | 19104 |
4 | Texas Children's Hospital | Houston | Texas | United States | 77030 |
5 | Seattle Children's | Seattle | Washington | United States | 98105 |
6 | University of Wisconsin, American Family Children's Hospital | Madison | Wisconsin | United States | 53792 |
Sponsors and Collaborators
- MacroGenics
Investigators
- Study Director: Chief Medical Officer, MacroGenics
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- CP-MGA271-04