Study of STP938 in Advanced Solid Tumours

NCT06297525RecruitingPHASE1INTERVENTIONAL

Summary

Key Facts

Lead Sponsor

Step Pharma, SAS

Enrollment

70

Start Date

2024-08-02

Completion Date

2026-12-01

Study Type

INTERVENTIONAL

Official Title

An Open-Label, Phase 1 Study to Evaluate Safety, Tolerability and Pharmacokinetics of the CTPS1 Inhibitor STP938 in Adult Subjects With Advanced Solid Tumors, With a Safety Expansion in Advanced CTPS2 Null Ovarian Cancer

Interventions

STP938

Conditions

Solid Tumor

Eligibility

Age Range

18 Years+

Sex

ALL

Main Inclusion Criteria:

* Signed and dated informed consent, and able to comply with the study procedures and any locally required authorization.
* Male or female aged ≥ 18 years.
* Advanced disease not curable by available therapies and requires systemic therapy.
* Histologically confirmed diagnosis of eligible cancer type.
* Must have tumor tissue available for biomarker testing.
* Measurable disease (Part 1) and measurable disease per RECIST (Part2)
* Eastern Cooperative Oncology Group (ECOG) performance status ≤2.
* Life expectancy \> 3 months as assessed by the Investigator.
* Adequate organ function (bone marrow, hepatic, renal function and coagulation).
* All toxicities (except alopecia) from prior cancer treatments or procedures must have resolved to ≤Grade 1 or returned to baseline levels prior to enrollment.

Main Exclusion Criteria:

* Pregnant or breastfeeding females and women of childbearing potential or males unwilling to comply with contraception requirements.
* Known active or symptomatic CNS metastases, carcinomatous meningitis, leptomeningeal disease or a history of spinal cord compression
* Active malignancy within 2 years of study enrollment
* Prior radiation within 2 weeks of start of therapy.
* Systemic cancer treatments, monoclonal antibody-directed therapies, other investigational agents within 4 weeks before enrollment, or \<5 half-lives since completion of previous investigational therapy, whichever is shorter.
* Uncontrolled intercurrent illness.
* Immunocompromised subjects with increased risk of opportunistic infections or history of opportunistic infection in the last 12 months.
* Known active or chronic hepatitis B or active hepatitis C virus (HCV) infection.
* Subjects with corrected QT interval \>470 msec based on averaged triplicate electrocardiogram (ECG) readings at the Screening Visit using the QT interval corrected for heart rate using Fridericia's method (QTcF).

Outcome Measures

Primary Outcomes

Safety and Tolerability

Incidence of dose limiting toxicities (DLTs), serious adverse events (SAEs), treatment-emergent adverse events (TEAEs)

Time frame: Through study completion, an average of 6 months

Secondary Outcomes

Area under the curve (AUC) of STP938

Pharmacokinetic parameter from plasma STP938 levels

Time frame: 9 days

Maximum plasma concentration (Cmax)

Pharmacokinetic parameter from plasma STP938 levels

Time frame: 9 Days

Time to reach maximum concentration (TMax)

Pharmacokinetic parameter from plasma STP938 levels

Time frame: 9 Days

Evaluation of preliminary clinical activity of STP938

Evaluation of ORR using standard response criteria

Time frame: Through study completion, an average of 6 months

Evaluation of best overall response of STP938

Evaluation of best overall response (Complete response \[CR\], Partial response \[PR\], Stable disease \[SD\], Progression of disease \[PD\], Not evaluable, Not applicable) using standard response criteria

Time frame: Through study completion, an average of 6 months

Evaluation of Duration of Response

Duration of response (DoR) is defined as the time, in days, from the date measurement criteria that are first met for CR or PR (whichever is first recorded) to the first date that relapse, progressive disease or death, whichever occurs first

Time frame: Through study completion, an average of 6 months

Evaluation of Progression Free Survival

Progression-free survival (PFS) is defined as the time from first STP938 dose to the date of disease progression or death, whichever occurs first

Time frame: Through study completion, an average of 6 months

Change in serum CA125 (ovarian cancer only)

Evaluation of CA125 using standard response criteria

Time frame: Through study completion, an average of 6 months

Locations

Comprehensive Hematology Oncology, LLC, St. Petersburg, United States

Mary Crowley Cancer Research Center, Dallas, United States

Next Oncology, San Antonio, United States

Institut Gustave Roussy, Villejuif, France

The Beatson Institute for Cancer Research, Glasgow, United Kingdom

University College London, London, United Kingdom

The Christie, Manchester, United Kingdom

Study of STP938 in Advanced Solid Tumours