A Study of SR-8541A (ENPPI Inhibitor) in Advanced/Metastatic Solid Tumors

NCT ID: NCT06063681

Last Updated: 2025-06-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE1

Total Enrollment

25 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-10-12

Study Completion Date

2025-12-31

Brief Summary

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This is an open-label, dose-escalation, multi-center phase 1 study evaluating the safety, tolerability, and pharmacokinetics (PK) of SR-8541A administered orally as a monotherapy or in combination with an immune checkpoint inhibitor (ICI) in subjects with solid tumors.

Detailed Description

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SR-8541A, an ENPP1 inhibitor, will be administered orally as a monotherapy to assess safety, tolerability, and pharmacokinetics (PK) in subjects with advanced/metastatic solid tumors.

Subjects eligible for treatment include those whose disease is refractory to standard therapeutic options, or for which there are no standard therapeutic options available.

All enrolled patients will orally administer SR-8541A daily. Treatment may continue until the subject's disease worsens or another treatment discontinuation criterion is met.

The combination part will only commence once the SRC has deemed it safe to proceed and a SR-8541A dose from the dose escalation part is selected as the RP2D. The ICI will be either nivolumab or pembrolizumab and dosing will be per SOC. Both investigational products will start on C1D1. Treatment with ICI may be continued if SR-8541A is discontinued and treatment with SR-8541A may be continued after ICI is discontinued.

Approximately 10 subjects will be enrolled.

Conditions

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Advanced / Metastatic Solid Tumor

Study Design

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Allocation Method

NA

Intervention Model

SEQUENTIAL

The study will follow an accelerated titration dose (ATD) escalation scheme. Single-subject cohorts will open sequentially when previous cohort milestones are met, e.g. completion of the Dose-Limiting Toxicity (DLT) period.

If the single evaluable subject within an ATD cohort experiences a grade ≥ 2 toxicity during the DLT period, the ATD scheme will stop and a traditional 3+3 design will be implemented.

The combination part will only commence once the SRC has deemed it safe to proceed and a SR-8541A dose from the dose escalation part is selected as the RP2D. The ICI will be either nivolumab or pembrolizumab and dosing will be per SOC. Both investigational products will start on C1D1. Treatment with ICI may be continued if SR-8541A is discontinued and treatment with SR-8541A may be continued after ICI is discontinued.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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SR-8541A Monotherapy

SR-8541A will be orally administered.

Group Type EXPERIMENTAL

SR-8541A

Intervention Type DRUG

orally administered ENPP1 inhibitor

Immune checkpoint inhibitor (ICI)

Intervention Type DRUG

The ICI will be either nivolumab or pembrolizumab.

Interventions

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SR-8541A

orally administered ENPP1 inhibitor

Intervention Type DRUG

Immune checkpoint inhibitor (ICI)

The ICI will be either nivolumab or pembrolizumab.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

1. Life expectancy of at least 3 months
2. Eastern Cooperative Oncology Group (ECOG) performance status 0 - 1
3. Histopathologically/cytologically confirmed advanced solid tumor, which is refractory to standard therapeutic options, or for which there are no standard therapeutic options.
4. Measurable disease per RECIST v1.1
5. Willing to provide archival or fresh tumor tissue during screening (required) and post-treatment (optional)
6. Adequate hematologic, renal and hepatic function

Exclusion Criteria

1. Primary central nervous system (CNS) tumor
2. Prior systemic anti-cancer treatment including other investigational agents, surgery, or radiation within 28 days or 5 half-lives, whichever is less
3. Continuous systemic treatment with either corticosteroids (\>10 milligram \[mg\] daily prednisone equivalents) or other immunosuppressive medications within 28 days
4. Active autoimmune disease that has required systemic treatment in past 2 years
5. History of documented congestive heart failure (New York Heart Association \[NYHA\] class II - IV); unstable angina; poorly controlled hypertension; clinically significant valvular heart disease; high-risk uncontrolled arrhythmias (including sustained ventricular tachycardia); myocardial infarction, unstable angina, cerebrovascular accident, or transient ischemic attack within the last 6 months, or Canadian Cardiovascular Society angina class \> 2
6. Troponin I \> ULN
7. Blood pressure (BP) - Systolic \< 95 mmHg or \> 160 mmHg or diastolic \> 100 mmHg
8. Resting heart rate (HR) \> 100 beats per minute (BPM)
9. Corrected QT interval by Fridericia (QTcF) ≥ 470 ms
10. Left Ventricular Ejection Fraction (LVEF) \< 50%
11. Symptomatic uncontrolled CNS disease requiring treatment with steroids or anti-seizure medications within 2 months
12. Leptomeningeal disease
13. Spinal cord compression not definitively treated with surgery and/or radiation or previously diagnosed and treated spinal cord compression without evidence that disease has been clinically stable for at least 8 weeks
14. Bleeding diathesis due to underlying medical condition or anticoagulation medication which is unable to be promptly reversed by medical treatment
15. Prior additional malignancy that is progressing or has received treatment the previous 3 years
16. Active infection requiring systemic treatment
17. Positive for human immunodeficiency virus (HIV) (HIV antibodies) or active hepatitis B (e.g., HbsAg reactive) or active hepatitis C (e.g., HCV ribonucleic acid \[RNA\] qualitative) infection with detectable viral load
18. Major surgery within 28 days prior to Day 1 and/or minor surgery (excluding biopsy) within 7 days
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Stingray Therapeutics

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Vinod Ganju, MD

Role: PRINCIPAL_INVESTIGATOR

Peninsula & South Eastern Haematology & Oncology Group

Locations

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Scientia Clinical Research Ltd

Randwick, New South Wales, Australia

Site Status RECRUITING

Monash Health

Clayton, Victoria, Australia

Site Status RECRUITING

Peninsula & South Eastern Haematology & Oncology Group

Frankston, Victoria, Australia

Site Status RECRUITING

Countries

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Australia

Central Contacts

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Sunil Sharma

Role: CONTACT

Jonathan Northrup

Role: CONTACT

317-517-9500

Facility Contacts

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Charlotte Lemech

Role: primary

Amy Body

Role: primary

Vinod Ganju

Role: primary

Other Identifiers

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StingrayTx

Identifier Type: -

Identifier Source: org_study_id

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