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A Study of Mipasetamab Uzoptirine (ADCT-601) in Participants With Solid Tumors

A Phase 1b, Open-Label, Dose-Escalation and Dose-Expansion Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antitumor Activity of Mipasetamab Uzoptirine (ADCT-601) Monotherapy and in Combination With Other Anti-Cancer Therapies in Patients With Selected Advanced Solid Tumors

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05389462
Enrollment
128
Registered
2022-05-25
Start date
2022-07-13
Completion date
2025-04-17
Last updated
2025-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Advanced Solid Tumors

Keywords

Advanced solid tumors, Mipasetamab uzoptirine, ADCT-601, Sarcoma, Gemcitabine, AXL, Pancreatic cancer, NSCLC

Brief summary

The primary objective of this study is to identify the recommended phase 2 dose (RP2D) and/or the maximum tolerated dose (MTD), and characterize the safety and tolerability of ADCT-601 monotherapy and in combination with gemcitabine.

Interventions

Intravenous (IV) infusion

DRUGGemcitabine

Intravenous (IV) infusion

Sponsors

ADC Therapeutics S.A.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Male or female participant aged 18 years or older. 2. Pathologic diagnosis of solid tumor malignancy that is locally advanced or metastatic at time of screening: Part 1: 1. Combination therapy arms: Selected sarcoma indications from the following 2 separate categories. * Soft tissue sarcoma: leiomyosarcoma, liposarcoma, undifferentiated pleomorphic sarcoma (UPS; covering malignant fibrous histiocytoma) and synovial sarcoma. * Bone sarcoma: Ewing's sarcoma (including extraskeletal), osteosarcoma, and chondrosarcoma. 2. Monotherapy arms: * Sarcoma indications (including those listed for combination therapy arms) regardless of AXL gene amplification status. * NSCLC regardless of AXL gene amplification status. * Solid tumors (lymphomas participants are excluded) with known AXL gene amplification. Part 2: 1. Combination therapy arms: Sarcoma indications and PAAD. 2. Monotherapy arms: PAAD, NSCLC and solid tumors with AXL expression. 3. Participants who are refractory to or intolerant to available standard therapy(ies) known to provide clinical benefit for their condition per Investigator judgment. 4. Participants with measurable disease as determined by Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. 5. Eastern Cooperative Oncology Group (ECOG) performance status 0 - 1. 6. PAAD only: Royal Marsden Hospital Prognostic Score 0 - 1.

Exclusion criteria

1. History of recent infection requiring intravenous (IV) antibiotics, IV antiviral, or IV antifungal treatment within 4 weeks of Cycle 1 Day 1 (C1D1). 2. Symptomatic central nervous system (CNS) metastases or evidence of leptomeningeal disease (brain magnetic resonance imaging \[MRI\] or previously documented cerebrospinal fluid \[CSF\] cytology). Previously treated asymptomatic CNS metastases are permitted provided that the last treatment (systemic anticancer therapy and/or local radiotherapy) was completed ≥4 weeks prior to Day 1 except usage of low dose of steroids on a taper (i.e., up to 10 mg prednisone or equivalent on Day 1 and consecutive days is permissible if being tapered down). Participants with discrete dural metastases are eligible. 3. Clinically significant third space fluid accumulation (i.e., ascites requiring drainage or any serosal effusion that is either requiring drainage or associated with shortness of breath). 4. Active diarrhea Common Terminology Criteria for Adverse Events (CTCAE) Grade 2 or a medical condition associated with chronic diarrhea (such as irritable bowel syndrome, inflammatory bowel disease). 5. Use of any other experimental medication within 14 days prior to start of study drug (C1D1).

Design outcomes

Primary

MeasureTime frameDescription
Safety and Tolerability as Assessed by Number of Participants with Adverse Events (AEs)Up to approximately 2 yearsAdverse events (AEs) and serious adverse events (SAEs) are defined as any untoward medical occurrence in participants whether or not considered related to the investigational medicinal product. Any clinically significant changes in vital signs, laboratory values, 12-lead electrocardiogram (ECG) and Eastern Cooperative Oncology Group (ECOG) performance status results will be recorded as AEs and SAEs.
Number of Participants who Experience a Dose Limiting Toxicity (DLT)Day 1 to Day 21
Number of Participants who Experience a Dose InterruptionUp to approximately 2 years
Number of Participants who Experience a Dose ReductionUp to approximately 2 years

Secondary

MeasureTime frame
Overall Response Rate (ORR)Up to approximately 2 years
Duration of Response (DOR)Up to approximately 2 years
Progression-Free Survival (PFS)Up to approximately 2 years
Overall Survival (OS)Up to approximately 2 years
Serum Concentration of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199Day 1 up to approximately 2 years
Maximum Concentration (Cmax) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Time to Maximum Concentration (Tmax) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Area Under the Concentration-time Curve from Time Zero to the Last Quantifiable Concentration (AUClast) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Area Under the Concentration-time Curve from Time Zero to the End of the Dosing Interval (AUCtau) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Area Under the Concentration-time Curve from Time Zero to Infinity (AUCinf) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Apparent Terminal Elimination Half-life (T1/2) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Apparent Clearance (CL) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Apparent Steady-state Volume of Distribution (Vss) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Accumulation Index (AI) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in SerumDay 1 up to approximately 2 years
Number of Participants With an Anti-drug Antibody (ADA) Response to ADCT-601Day 1 up to approximately 2 years
Number of Participants With Anti-drug Antibody (ADA) Titers to ADCT-601Day 1 up to approximately 2 years

Countries

France, Spain, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 6, 2026