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Phase 1 Completed N=69 Treatment

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

OutcomeResultp-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.
View full record on ClinicalTrials.gov →

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.

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