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ADCT-901

Phase 1

Advanced Solid Tumors | Small molecule | Oncology |ADC Therapeutics SA|Trials Updated: May 22, 2025

ADCT-901 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Jul 2021

ADCT-901 target and mechanism

Molecular targetKAAG1
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment30

FDA Designations

No designations recorded

ADCT-901 clinical trials

ADCT-901 · 1 trial · 1 indication

Phase 1 1
NCT04972981A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antitumor Activity of ADCT-901 in Participants With Selected Advanced Solid TumorsAdvanced Solid Tumors
COMPLETED30 Analytics
PHASE1COMPLETED
A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antitumor Activity of ADCT-901 in Participants With Selected Advanced Solid Tumors
Advanced Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and Tolerability as Assessed by Number of Participants with Adverse Events (AEs)
Up to approximately 2.5 years

Adverse events (AEs) and serious adverse events (SAEs) were 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) During the Dose-Escalation Phase
Day 1 to Day 21
Number of Participants Who Experience a Dose Interruption
Up to approximately 2.5 years
Number of Participants Who Experience a Dose Reduction
Up to approximately 2.5 years

Secondary Endpoints

Overall Response Rate (ORR)
Up to approximately 2.5 years
Duration of Response (DOR)
Up to approximately 2.5 years
Progression-Free Survival (PFS)
Up to approximately 2.5 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1: Dose EscalationEXPERIMENTALIn Part 1 (dose escalation) participants with selected advanced solid tumors will receive escalating doses of ADCT-901 as monotherapy. Participants can receive ADCT-901 until disease progression, adverse event (AE), or other discontinuation criteria, whichever occurs first.
Part 2: Dose ExpansionEXPERIMENTALIn Part 2 (dose expansion), participants will receive ADCT-901 monotherapy at the dose identified as the RP2D/MTD in Part 1 (dose escalation). Participants will be split into two groups: Group 1: An indication for which ADCT-901 showed in Part 1 to have preliminary activity. Group 2: A group of participants with Part 1 indications, except for the one selected in Group 1 of Part 2. No more than 30% of participants with the same indication are allowed in this basket group. Participants can receive ADCT-901 until disease progression, AE, or other discontinuation criteria, whichever occurs first.

Interventions

NameTypeDescription
ADCT-901DRUGIntravenous infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: 1. Pathologic diagnosis of selected solid tumor malignancy that is locally advanced or metastatic at time of Screening: cholangiocarcinoma, ovarian/fallopian tube cancers, prostate cancer, renal cell carcinoma, and triple negative breast cancer (TNBC). Note: Histologic varia...

Countries:United StatesSpainUnited Kingdom
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Competitive Landscape -Other Solid Tumors 10 trials (matched to "Advanced Solid Tumors")

Frequently asked questions about ADCT-901

What is ADCT-901?

ADCT-901 is an investigational small molecule developed by ADC Therapeutics SA for the treatment of selected advanced solid tumors. It is designed to target KAAG1, a tumor-associated antigen. ADCT-901 has been studied in a Phase 1 clinical trial and is not approved for any indication.

What is ADCT-901 used for?

ADCT-901 is being evaluated for use in patients with selected advanced solid tumors. The Phase 1 study enrolled adults aged 18 years and older with these cancers. It is an investigational therapy and has not been approved for commercial use in any indication.

What does ADCT-901 target?

ADCT-901 targets KAAG1, a tumor-associated antigen expressed in certain solid tumors. By binding to KAAG1, the agent is designed to deliver its therapeutic effect selectively to cancer cells. This targeted approach is intended to focus activity on tumor tissue while limiting effects on normal cells.

Who is developing ADCT-901?

ADCT-901 is being developed by ADC Therapeutics SA, a clinical-stage oncology company that trades under the ticker ADCT. The company is the sponsor of the Phase 1 study evaluating ADCT-901 in advanced solid tumors. ADC Therapeutics focuses on antibody-drug conjugate and related targeted oncology therapies.

What phase is ADCT-901 in?

ADCT-901 is in Phase 1 clinical development. The single Phase 1 trial, NCT04972981, has been completed, and no active trials are currently listed. ADCT-901 is investigational and has not received FDA approval for any indication.

What clinical trials is ADCT-901 in?

ADCT-901 has been studied in one Phase 1 trial, NCT04972981, titled a study to evaluate the safety, tolerability, pharmacokinetics, and antitumor activity of ADCT-901 in participants with selected advanced solid tumors. The trial enrolled 30 participants across the United States, Spain, and the United Kingdom and is now completed.