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A Phase 1a/1b Study of ACTM-838 in Patients With Advanced Solid Tumors

A Phase 1a/1b Open-label, Dose-Escalation and Expansion Study of ACTM-838 as a Single Agent in Patients With Advanced Solid Tumors

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06336148
Enrollment
10
Registered
2024-03-28
Start date
2024-06-05
Completion date
2025-08-28
Last updated
2025-10-15

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

Conditions

Solid Tumor

Keywords

non-small cell lung cancer, head and neck cancer, esophageal cancer, ovarian cancer, cervical cancer, stomach cancer, thyroid cancer, renal cell cancer, mesothelioma, breast cancer, pancreatic cancer, colorectal cancer, sarcoma, immunotherapy, melanoma, bladder cancer, cholangiocarcinoma, bile duct cancer

Brief summary

This is a first in human (FIH) 2-part study using ACTM-838 in patients with advanced solid tumors resistant to standard of care treatment. Part 1a will evaluate dose escalation and Part 1b will evaluate dose expansion.

Detailed description

This study has 2 parts. Part 1a will evaluate the safety and tolerability and activity of escalating doses of ACTM-838 to estimate the maximum tolerated dose (MTD) and/or the optimum biological dose (OBD) for ACTM-838 as a monotherapy and determine the dose recommended for Part 1b. Part 1b will further evaluate ACTM-838 in patients with advanced specific tumor types (defined pathologically, clinically and/or molecularly) based on data emerging from the Phase 1a and the pre-clinical program. The details on the Phase 1b dose expansion part will be incorporated in a future protocol amendment.

Interventions

DRUGACTM-838

Escalating doses of ACTM-838 in Part 1a and recommended dose in Part 1b

Sponsors

Actym Therapeutics, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Masking description

Open label

Intervention model description

This is an Open label Single dose study.

Eligibility

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

Inclusion criteria

1. Advanced solid tumor for which there is no remaining standard curative therapy and no therapy with a demonstrated survival benefit, or they must be ineligible to receive or refuse to receive such therapy 2. At least one measurable lesion per Response Evaluation Criteria in Solid Tumors (RECIST ) v1.1; amenable for biopsy, and radiographically apparent on computed tomography (CT) or magnetic resonance imaging (MRI ) 3. Eastern Cooperative Oncology Group (ECOG) 0-1 4. Adequate hematologic, hepatic, pulmonary, and cardiac function 5. CD4 count \>500/mL at screening 6. Additional protocol defined inclusion criteria may apply

Exclusion criteria

1. Active autoimmune disease requiring systemic treatment (i.e., with use of disease modifying agents, systemic corticosteroids or immunosuppressive drug) within the past 6 months prior to dosing of investigational product. 2. History of permanent artificial implants (e.g., prosthetic joints, artificial heart valves, pacemakers, orthopaedic screw\[s\], metal plate\[s\], bone graft\[s\], or other exogenous implant\[s\] 3. Known history of cholelithiasis or urolithiasis 4. History of valvular disease, arterial aneurisms or arterial or venous malformation 5. Known active brain metastases 6. Documented active Salmonella infection or vaccination with Salmonella typhi within 6 months prior to investigational product dosing 7. Additional protocol defined inclusion/

Design outcomes

Primary

MeasureTime frame
Incidence and severity of adverse events and serious adverse events - Part 1a1 year
Proportion of participants experiencing dose limiting toxicities - Part 1a28 Days

Secondary

MeasureTime frame
Clinical Benefit Rate (CR, PR, or stable disease (SD) as best overall response) - Part 1a1 year
Duration of Response (DoR), defined as the time from date of first response (CR or PR) - Part 1a1 year
Progression free survival (PFS) - Part 1a1 year
Objective response rate (ORR) defined as complete response (CR) or partial response (PR) - Part 1a1 year
Amount of ACTM-838 in blood, urine, and faeces as measured by digital droplet-polymerase chain reaction (ddPCR) - Part 1a1 year
Tumor PD colonization as measured by ddPCR and payload delivery as measured by RNA detection - Part 1a1 year
Incidence of antidrug antibodies (ADA) to ACTM-838 - Part 1a1 year
Change in tumor markers - Part 1a1 year
Confirmed ORR defined as confirmed CR or confirmed PR - Part 1a1 year

Countries

Australia, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026