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Advanced Solid TumorsPhase 1NCT05389462

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

A Phase 1 study testing ADCT-601 and Gemcitabine in people with Advanced Solid Tumors, run by ADC Therapeutics S.A. at 14 sites in 4 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial 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. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Advanced Solid Tumors
What is being tested?
ADCT-601 and Gemcitabine
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
128 participants
Where
14 sitesin 4 countries
Study dates
13 Jul 2022to 17 Apr 2025
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male or female participant aged 18 years or older.
  • Pathologic diagnosis of solid tumor malignancy that is locally advanced or metastatic at time of screening:
  • Part 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.
Show all 17Show fewer
  • 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:
  • Combination therapy arms: Sarcoma indications and PAAD.
  • Monotherapy arms: PAAD, NSCLC and solid tumors with AXL expression.
  • Participants who are refractory to or intolerant to available standard therapy(ies) known to provide clinical benefit for their condition per Investigator judgment.
  • Participants with measurable disease as determined by Response Evaluation Criteria in Solid Tumors (RECIST) v1.1.
  • Eastern Cooperative Oncology Group (ECOG) performance status 0 - 1.
  • PAAD only: Royal Marsden Hospital Prognostic Score 0 - 1.

Who cannot join

  • History of recent infection requiring intravenous (IV) antibiotics, IV antiviral, or IV antifungal treatment within 4 weeks of Cycle 1 Day 1 (C1D1).
  • 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.
  • 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).
  • 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).
  • Use of any other experimental medication within 14 days prior to start of study drug (C1D1).

Trial locations and contacts

14 sites in 4 countries.

14 sites in 4 countries

United States6 sites
  • University of IOWA

    Iowa City, Iowa, 52242

  • Vanderbilt University Medical Center (VUMC) - Ingram Cancer Center

    Nashville, Tennessee, 37232

  • Sarah Cannon at University of Oklahoma Health Sciences Center

    Oklahoma City, Oklahoma, 78229

  • Sarcoma Oncology Research Center

    Santa Monica, California, 90403

  • Washington University School of Medicine

    St Louis, Missouri, 63110

  • Stanford Cancer Center, Stanford Medicine at Stanford University

    Stanford, California, 94305

Other trials in United States

France3 sites
  • Institut Bergonié

    Bordeaux, Gironde, 33076

  • Institut Léon Bérard

    Lyon, 69008

  • Centre Antoine Lacassagne

    Nice, 06189

Other trials in France

Spain3 sites
  • Hospital Universitario Vall d'Hebron

    Barcelona, 08035

  • Hospital Universitario Fundacion Jimenez Diaz

    Madrid, 28040

  • Hospital Universitario Madrid Sanchinarro

    Madrid, 28050

Other trials in Spain

United Kingdom2 sites
  • The Royal Marsden NHS Foundation Trust

    London, England, SW3 6JJ

  • The Christie NHS Foundation Trust

    Manchester, England, M20 4BX

Other trials in United Kingdom

About this study

Official title: 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

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.

Being tested
ADCT-601, Gemcitabine
Keywords
Advanced solid tumors, Mipasetamab uzoptirine, ADCT-601, Sarcoma, Gemcitabine, AXL, Pancreatic cancer, NSCLC
Medical subject headings
Sarcoma, Pancreatic Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ADCT-601Drug

    Also called Mipasetamab uzoptirine

    Intravenous (IV) infusion

  • GemcitabineDrug

    Intravenous (IV) infusion

Study groups in NCT05389462
Study groupRoleWhat they receive
Part 1: Dose Escalation, ADCT-601 Combination TherapyExperimentalIn Part 1 (dose escalation), participants with selected sarcoma indications will receive escalating doses of ADCT-601 in combination with gemcitabine.
Receives: Drug: ADCT-601; Drug: Gemcitabine
Part 1: Dose Escalation, ADCT-601 MonotherapyExperimentalIn Part 1 (dose escalation), participants with sarcoma indications (regardless of AXL gene amplification status), non-small-cell lung cancer (NSCLC) (regardless of AXL gene amplification status), and solid tumors with AXL gene amplification, will receive ADCT-601 monotherapy.
Receives: Drug: ADCT-601
Part 2: Dose Expansion, ADCT-601 Combination TherapyExperimentalIn Part 2 (dose expansion), participants with selected sarcoma indications will receive ADCT-601 in combination with gemcitabine. Participants will be split into 3 cohorts: Cohorts 5 and 6: Sarcoma indications. Cohort 7: Pancreatic cancer.
Receives: Drug: ADCT-601; Drug: Gemcitabine
Part 2: Dose Expansion, ADCT-601 MonotherapyExperimentalIn Part 2 (dose expansion), participants with a selected indication will receive ADCT-601 monotherapy. Participants will be split into cohorts: Cohort 1: Soft tissue sarcoma (STS). Cohort 2: Pancreatic adenocarcinoma (PAAD). Cohort 3: NSCLC. Cohort 4: Solid tumors with known AXL expression.
Receives: Drug: ADCT-601

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Safety and Tolerability as Assessed by Number of Participants with Adverse Events (AEs)

    Adverse 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.

    Measured: Up to approximately 2 years

  2. Number of Participants who Experience a Dose Limiting Toxicity (DLT)

    Measured: Day 1 to Day 21

  3. Number of Participants who Experience a Dose Interruption

    Measured: Up to approximately 2 years

  4. Number of Participants who Experience a Dose Reduction

    Measured: Up to approximately 2 years

Secondary outcomes (16)
  1. Overall Response Rate (ORR)

    Measured: Up to approximately 2 years

  2. Duration of Response (DOR)

    Measured: Up to approximately 2 years

  3. Progression-Free Survival (PFS)

    Measured: Up to approximately 2 years

  4. Overall Survival (OS)

    Measured: Up to approximately 2 years

  5. Serum Concentration of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199

    Measured: Day 1 up to approximately 2 years

  6. Maximum Concentration (Cmax) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  7. Time to Maximum Concentration (Tmax) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  8. 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 Serum

    Measured: Day 1 up to approximately 2 years

  9. 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 Serum

    Measured: Day 1 up to approximately 2 years

  10. 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 Serum

    Measured: Day 1 up to approximately 2 years

  11. Apparent Terminal Elimination Half-life (T1/2) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  12. Apparent Clearance (CL) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  13. Apparent Steady-state Volume of Distribution (Vss) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  14. Accumulation Index (AI) of ADCT-601 Total Antibody, Pyrrolobenzodiazepine (PBD)-Conjugated Antibody, and Unconjugated Warhead SG3199 in Serum

    Measured: Day 1 up to approximately 2 years

  15. Number of Participants With an Anti-drug Antibody (ADA) Response to ADCT-601

    Measured: Day 1 up to approximately 2 years

  16. Number of Participants With Anti-drug Antibody (ADA) Titers to ADCT-601

    Measured: Day 1 up to approximately 2 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 May 2022
  2. Study start13 Jul 2022
  3. Primary completion17 Apr 2025
  4. Study completion17 Apr 2025

Why it stopped: Sponsor decided to halt further development of ADCT-601

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
128 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05389462
Sponsor's protocol ID
ADCT-601-102
Other IDs
2021-005566-18
Status last verified
May 2025
First submitted
20 May 2022
Last updated
22 May 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing ADCT-601 and Gemcitabine in people with Advanced Solid Tumors, run by ADC Therapeutics S.A. at 14 sites in 4 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 17 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 22 May 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 14 sites in United States, France, Spain, United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study was stopped early (reason given: Sponsor decided to halt further development of ADCT-601). Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Safety and Tolerability as Assessed by Number of Participants with Adverse Events (AEs) (time frame: Up to approximately 2 years). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 May 2025.

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