A Phase I/II Clinical Study of CTS3497 in Patients With MTAP Deficient Malignacies

NCT ID: NCT06971523

Last Updated: 2025-05-14

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

224 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-12-25

Study Completion Date

2029-06-30

Brief Summary

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The primary objective of Phase I of this study is to evaluate the safety and tolerability, and to determine the maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D) of CTS3497 in patients with metastatic or locally advanced methylthioadenosine phosphorylase (MTAP)-deficient solid tumors and lymphomas.

The primary objective of Phase II of this study is to evaluate the efficacy of CTS3497 in patients with metastatic or locally advanced MTAP-deficient solid tumors and lymphomas.

Detailed Description

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The primary objective of Phase I of this study is to evaluate the safety, tolerability, PK, PD and efficacy to determine the maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D) of CTS3497 in patients with metastatic or locally advanced methylthioadenosine phosphorylase (MTAP)-deficient solid tumors and lymphomas.

The primary objective of Phase II of this study is to evaluate the efficacy and safety of CTS3497 in patients with metastatic or locally advanced MTAP-deficient solid tumors and lymphomas.

Conditions

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Solid Tumor Lymphoma

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Phase I: CTS3497 Monotherapy Dose Escalation/Dose Expansion

7 dose groups are pre-specified in Dose Escalation,and 2-3 dose groups in Dose Expansion.

Group Type EXPERIMENTAL

CTS3497

Intervention Type DRUG

CTS3497: Orally via capsules

Phase II: CTS3497 Monotherapy Expansion

CTS3497 RP2D administered to patients with MTAP homozygous deletion including the following cohorts: esophageal squamous cell carcinoma \[ESCC\], pancreatic adenocarcinoma \[PAAD\], biliary tract cancer \[BTC\], non-small cell lung carcinoma\[NSCLC\], malignant pleural mesothelioma \[MPM\], Urothelial cancer, high-grade gliomas, other solid tumors, and lymphomas.

Group Type EXPERIMENTAL

CTS3497

Intervention Type DRUG

CTS3497: Orally via capsules

Interventions

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CTS3497

CTS3497: Orally via capsules

Intervention Type DRUG

Other Intervention Names

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CTS3497 capsules

Eligibility Criteria

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Inclusion Criteria

* ≥ 18 years of age at the signing of ICF.
* Patients with histologically or cytologically confirmed locally advanced or metastatic solid tumors who cannot be treated surgically and have failed standard of care (SoC). Or patients with refractory/relapsed lymphomas.
* MTAP deficiency is confirmed by IHC or NGS.
* At least one evaluable tumor lesion at screening for patients in escalation part, and at least one measurable tumor lesion for patients in expansion part.
* ECOG performance status of 0 to 1.
* Adequate hematopoietic function, cardiac function, liver function, renal function, and coagulation function per local laboratory.

Exclusion Criteria

* Female patients in pregnancy or lactation.
* Patients with dysphagia; or a condition that seriously affects gastrointestinal absorption.
* Allergic or intolerant to the active ingredients or excipients of the investigational product.
* Anti-tumor therapy within 28 days of study day 1.
* Prior treatment with an methionine adenosyltransferase 2α (MAT2A) inhibitor or a protein arginine methyltransferase 5 (PRMT5) inhibitor.
* Central nervous system (CNS) metastasis at screening.
* Live vaccine therapy within 4 weeks before study drug administration.
* Use of therapeutic anti-coagulation for treatment of active thromboembolic events.
* Use of prescription medications that are known strong inducers or inhibitors of cytochrome P450 3A4 (CYP3A4) within 14 days or 5 half-lives (whichever is longer) before study day 1.
* Unresolved toxicity from prior anti-cancer therapy.
* Active infection of HIV, HBV or HCV.
* Patients who are judged by the investigator to have a history of other serious systemic diseases, or not suitable for participating in the trial for any other reason.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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CytosinLab Therapeutics Co., Ltd.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Haiping Wu, PhD

Role: STUDY_CHAIR

CytosinLab Therapeutics Co., Ltd.

Locations

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Beijing Cancer Hospital

Beijing, Beijing Municipality, China

Site Status RECRUITING

Countries

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China

Central Contacts

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Shuning Xing, MS

Role: CONTACT

0086-21-58920766

Jifang Gong, MD

Role: CONTACT

0086-10-88196561

Facility Contacts

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Lin Shen, MD

Role: primary

0086-10-88196561

Jifang Gong, MD

Role: backup

0086-10-88196561

Other Identifiers

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CTS3497-CI01

Identifier Type: -

Identifier Source: org_study_id

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