Phase 1
Completed N=69
First-in-Human Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Mirvetuximab Soravtansine in Adults With Ovarian Cancer and Other Folate Receptor 1 (FOLR1)-Positive Solid Tumors
Source: ClinicalTrials.gov NCT01609556 ↗Enrolled (actual)
69
Serious AEs
38.4%
Results posted
Feb 2021
Primary outcomePrimary: Dose-Escalation Phase: Maximum Tolerated Dose (MTD) of Mirvetuximab Soravtansine — 6.0; 2.0 mg/kg
Summary
The purpose of this study is to test mirvetuximab soravtansine (IMGN853) in participants with ovarian cancer and other FOLR-1 positive tumors.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Dose-Escalation Phase: Maximum Tolerated Dose (MTD) of Mirvetuximab Soravtansine |
6.0; 2.0 | — |
| PRIMARY Dose-Escalation Phase: Recommended Phase 2 Dose (RP2D) of Mirvetuximab Soravtansine |
6.0 | — |
| SECONDARY Number of Participants With TEAEs |
2; 1; 0; 1; 9; 18 | — |
| SECONDARY Number of Participants With Shift From Baseline Grade <=2 in Clinical Laboratory Parameters to Grade 3 or Grade 4 on Study |
0; 0; 0; 0; 0; 0 | — |
| SECONDARY Number of Participants With Clinically Significant Abnormalities in Physical Examination Findings and Vital Signs |
0; 0; 0; 0; 0; 0 | — |
| SECONDARY Number of Participants With Clinically Significant Abnormalities in Electrocardiogram (ECG) |
0; 0; 0; 0; 0; 0 | — |
| SECONDARY Number of Participants With Treatment-Emergent Ocular AEs |
0; 0; 0; 0; 1; 4 | — |
| SECONDARY Maximum Observed Plasma Concentration (Cmax) of Mirvetuximab Soravtansine and Total M9346A Antibody at RP2D |
146.9; 154.6; 149.2; 170.4 | — |
| SECONDARY Cmax of Free DM4 and S-Methyl DM4 at RP2D |
5.014; 5.016; 12.43; 9.974 | — |
| SECONDARY Area Under the Plasma Concentration-Time Curve Extrapolated to Infinity (AUC0-inf) of Mirvetuximab Soravtansine and Total M9346A Antibody at RP2D |
17.39; 20.40; 24.00; 37.27 | — |
| SECONDARY AUC0-inf of Free DM4 and S-Methyl DM4 at RP2D |
292.9; 290.6; 2656; 1928 | — |
| SECONDARY Area Under the Plasma Concentration-Versus Time Curve From Time of Dose Until Tlast (AUClast) of Mirvetuximab Soravtansine and Total M9346A Antibody at RP2D |
16.44; 18.91; 20.27; 29.29 | — |
| SECONDARY AUClast of Free DM4 and S-Methyl DM4 at RP2D |
246.0; 270.1; 2485; 1806 | — |
| SECONDARY Terminal Half-Life (t1/2) of Mirvetuximab Soravtansine,Total M9346A Antibody, DM4, and S-Methyl DM4 at RP2D |
119.4; 127.8; 186.7; 218.8; 73.80; 80.62 | — |
| SECONDARY Clearance (CL) of Mirvetuximab Soravtansine and Total M9346A Antibody at RP2D |
22.20; 19.80; 16.89; 13.26 | — |
| SECONDARY CL of DM4 and S-Methyl DM4 at RP2D |
1421; 1338; 218.9; 258.4 | — |
| SECONDARY Time to Reach Maximum Observed Concentration (Tmax) of Mirvetuximab Soravtansine, Free DM4, S-Methyl DM4, and Total M9346A Antibody at RP2D |
3.80; 3.20; 3.60; 3.20; 5.80; 5.00 | — |
| SECONDARY Volume of Distribution at Steady State (Vss) of Mirvetuximab Soravtansine Free DM4, S-Methyl DM4, and Total M9346A Antibody at RP2D |
3.198; 3.172; 3.744; 3.671; 107400; 114300 | — |
| SECONDARY Objective Response Rate (ORR): Percentage of Participants With Objective Response as Assessed by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1) |
5; 13; 30; 8 | — |
| SECONDARY Duration of Response (DOR) as Assessed by RECIST v1.1 |
21.3; 60.2; 19.3; 28.6 | — |
| SECONDARY Progression-Free Survival (PFS) as Assessed by RECIST v1.1 |
2.6; 3.9; 4.3; 2.8 | — |
| SECONDARY Time to Progression (TTP) as Assessed by RECIST v1.1 |
2.7; 3.9; 4.4; 2.8 | — |
| SECONDARY Number of Participants With Anti-Drug Antibodies (ADA) |
0; 0; 1; 0; 1; 1 | — |
| SECONDARY Number of Participants With Gynecologic Cancer Intergroup (GCIG) CA-125 Criteria Clinical Responses |
0; 0; 0; 0; 0; 3 | — |
Eligibility Criteria
Inclusion Criteria
- Participants with advanced solid tumor that is refractory to standard treatment, for which no standard treatment is available, or the participant refuses standard therapy.
- Participants must be willing to provide an archival tumor tissue block or slides for biomarker analysis.
- Eastern Cooperative Oncology Group (ECOG) Performance Status 0 or 1.
- Time from prior therapy:
- Systemic anti-neoplastic therapy: five half-lives or four weeks, whichever is shorter (6 weeks for prior nitrosoureas or mitomycin C).
- Radiotherapy: wide-field radiotherapy (for example, greater than [>] 30 percent [%] of marrow-bearing bones) completed at least four weeks, or focal radiation completed at least two weeks, prior to starting study drug.
- Participants must have recovered or stabilized from all therapy-related toxicities.
- Major surgery (not including placement of vascular access device or tumor biopsies) must be completed four weeks prior to Day 1. Participants must have recovered or stabilized from the side effects prior to study treatment.
- Participants must have adequate hematologic, liver and kidney function.
- Participants with central nervous system (CNS) disease involvement are eligible if they have had brain metastases resected or have received radiation therapy ending at least 4 weeks prior to study day 1 and they meet all of the following criteria: Residual neurological symptoms less than or equal to ( 1 neuropathy.
- Any active or chronic corneal disorder, including, but not limited to the following: Sjogren's syndrome, Fuch's corneal dystrophy (requiring treatment), history of corneal transplantation, active herpetic keratitis, and also active ocular conditions requiring ongoing treatment/monitoring such as wet age-related macular degeneration requiring intravitreal injections, active diabetic retinopathy with macular edema, presence of papilledema, acquired monocular vision.
- Serious concurrent illness, including, but not limited to the following:
- Clinically relevant active infection including known active hepatitis B or C, Human Immunodeficiency Virus (HIV) infection, varicella-zoster virus (shingles) or cytomegalovirus infection or any other known concurrent infectious disease, requiring IV antibiotics within 2 weeks of study enrollment.
- Significant cardiac disease such as recent myocardial infarction ( class II), uncontrolled hypertension (greater than or equal to [>=] Common Terminology Criteria for Adverse Events Version 4.03 [CTCAE v4.03] Grade 3), uncontrolled cardiac arrhythmias, severe aortic stenosis, or >=Grade 3 cardiac toxicity following prior chemotherapy.
- History of multiple sclerosis or other demyelinating disease, Eaton-Lambert syndrome (para-neoplastic syndrome), history of hemorrhagic or ischemic stroke within the last six months, or alcoholic liver disease.
- Previous clinical diagnosis of treatment-related pneumonitis.
- Any other concomitant anti-cancer treatment such as immunotherapy, biotherapy, radiotherapy, chemotherapy, investigative therapy, or high-dose steroids; however, low dose steroids and Luteinizing Hormone Releasing Hormone (LHRH) at doses that have been stable for >=14 days are permitted for participants with prostate cancer.
- Known hypersensitivity to previous monoclonal antibody therapy or maytansinoids.
- Prior history of solid tumor malignancy within the last 3 years except for adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, in situ breast cancer, in situ prostate cancer (participants must have shown no evidence of active disease for 2 years prior to enrollment).
- Concomitant administration of folate-containing vitamins.
- Participants who have received prior allogeneic or autologous bone marrow transplants.
- Women of childbearing potential who are pregnant or breast feeding.
Data sourced from ClinicalTrials.gov (NCT01609556). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.