A Phase 1/2 Study of STP938 for Adult Subjects With Relapsed/Refractory B-Cell and T-Cell Lymphomas

NCT ID: NCT05463263

Last Updated: 2025-04-15

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/PHASE2

Total Enrollment

180 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-08-03

Study Completion Date

2025-12-31

Brief Summary

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The Phase 1 part of the study is a dose escalation of STP938 as monotherapy.

The Phase 2 part of the study is cohort expansion of STP938 as a monotherapy in 5 different B and T cell lymphomas.

Detailed Description

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The drug STP938 is an inhibitor of an enzyme called cytidine triphosphate synthase 1 (CTPS1). CTPS1, and a very similar enzyme cytidine triphosphate synthase 2 (CTPS2), control the final step in the production of the cytidine triphosphate (CTP). CTP is an essential building block of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Studies of people with inherited mutations of the CTPS1 gene indicate that certain types of blood cells required CTPS1 in order to divide rapidly, whereas other cells in the body use the CTPS2 enzyme. Based on these observations, it is expected that blocking CTPS1, using the drug STP938, may be an effective treatment for certain types of cancer that arise from blood cells.

The purpose of this study is to see if STP938 is effective at treating different types of lymphoma. STP938 will be given as a tablet. Blood samples will be taken during the study in order to understand the effects of STP938 on the lymphoma and on the rest of the body. The main outcome of the first part of the study is to see if STP938 can be given safely to patients with lymphoma, and to work out the best dose of STP938. The main outcome of the second part of the study is to see if ST938 is effective in treating different types of lymphoma.

Conditions

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Lymphoma, B-Cell Lymphoma, T-Cell

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Patients will be assigned to a dose level of STP938 (Phase 1) or an expansion cohort (Phase 2) at the time of their enrollment.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Phase 1 (Part 1, Dose Escalation)

Up to 5 dose levels with STP938 administered as oral monotherapy

Group Type EXPERIMENTAL

STP938

Intervention Type DRUG

Small molecule

Phase 2 (Part 2; expansion)

At defined dose level(s) with STP938 administered as oral monotherapy

Group Type EXPERIMENTAL

STP938

Intervention Type DRUG

Small molecule

Interventions

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STP938

Small molecule

Intervention Type DRUG

Eligibility Criteria

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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.
* Relapsed/refractory patients with histologically confirmed diagnosis of B cell or T cell lymphoma
* Must have received at least 2 prior systemic therapies and have no treatment options known to provide clinical benefit
* Must have measurable disease per Lugano lymphoma classification except for cutaneous T-cell lymphoma (CTCL) which is measured via International Society for Cutaneous Lymphomas (ISCL)/ European Organization of Research and Treatment of Cancer (EORTC).
* 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.

Exclusion Criteria

* Pregnant or breastfeeding females and women of child bearing potential or males unwilling to comply with contraception requirements.
* Known carcinomatous meningitis or central nervous system (CNS) involvement with lymphoma.
* Active malignancy within 2 years of study enrollment
* Prior radiation or surgical resection of their lymphoma without additional sites of measurable disease outside of the radiation field or subjects who have received prior radiation or surgical resection of their lymphoma ≤2 weeks prior to the first dose of study drug.
* 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 who have received a live vaccine within 30 days prior to study enrollment or whilst participating in the study.
* 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).
* Subjects who received a severe acute respiratory syndrome coronavirus 2 vaccine ≤3 weeks prior to study drug dosing.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Step Pharma, SAS

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Maureen Higgins

Role: STUDY_DIRECTOR

Step Pharma

Locations

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Colorado Blood Cancer Institute

Denver, Colorado, United States

Site Status RECRUITING

Florida Cancer Specialists

Sarasota, Florida, United States

Site Status RECRUITING

Memorial Sloan Kettering

New York, New York, United States

Site Status RECRUITING

The Centre Léon Bérard

Lyon, , France

Site Status RECRUITING

Institut Paoli Calmettes

Marseille, , France

Site Status RECRUITING

CHU de Nantes

Nantes, , France

Site Status RECRUITING

Hôpital Saint-Louis

Paris, , France

Site Status RECRUITING

Institut Gustave Roussy

Villejuif, , France

Site Status RECRUITING

University Hospitals of Leicester NHS Trust

Leicester, , United Kingdom

Site Status RECRUITING

Imperial College / Clinical Trials Unit, Hammersmith Hospital

London, , United Kingdom

Site Status RECRUITING

The Christie

Manchester, , United Kingdom

Site Status RECRUITING

Nottingham City Hospital

Nottingham, , United Kingdom

Site Status RECRUITING

Churchill Hospital

Oxford, , United Kingdom

Site Status RECRUITING

Derriford Hospital

Plymouth, , United Kingdom

Site Status RECRUITING

The Royal Marsden

Sutton, , United Kingdom

Site Status RECRUITING

Countries

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United States France United Kingdom

Central Contacts

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Maureen Higgins

Role: CONTACT

+33 1 86 26 43 56

Duc Tran

Role: CONTACT

+33 1 86 26 43 56

Facility Contacts

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M Tees

Role: primary

M Patel

Role: primary

Robert Stuver

Role: primary

646-608-4308

Yann Guillerman

Role: primary

Jean Laurent L'Attention

Role: primary

: +33 (0)4 9122 37 29

Benoit Tessoulin

Role: primary

Halim Bataouche

Role: primary

Vincent Ribrag

Role: primary

Matthew Ahearne

Role: primary

Lucy Cook

Role: primary

0203 313 4340

Kim Linton

Role: primary

Chris Fox

Role: primary

Graham Collins

Role: primary

David Lewis

Role: primary

Dima El Sharkawi

Role: primary

References

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Asnagli H, Minet N, Pfeiffer C, Hoeben E, Lane R, Laughton D, Birch L, Jones G, Novak A, Parker AE, Ludwig H, Fischer A, Latour S, Beer PA. CTP Synthase 1 Is a Novel Therapeutic Target in Lymphoma. Hemasphere. 2023 Mar 28;7(4):e864. doi: 10.1097/HS9.0000000000000864. eCollection 2023 Apr.

Reference Type DERIVED
PMID: 37008165 (View on PubMed)

Other Identifiers

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STP938-101

Identifier Type: -

Identifier Source: org_study_id

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