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A Phase 3 Trial in Advanced Epithelioid Mesothelioma

A Phase 3, Randomized, Open-label Trial Comparing VT3989 Versus Gemcitabine or Vinorelbine in Participants With Advanced Epithelioid Mesothelioma, Who Previously Received Platinum-Based Systemic Chemotherapy and Immunotherapy

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07824986
Acronym
sTEADfast
Enrollment
350
Registered
2026-09-17
Start date
2026-12-01
Completion date
2031-01-01
Last updated
2026-09-17

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

Conditions

Mesothelioma, Pleural Mesothelioma

Keywords

Mesothelioma

Brief summary

This randomized, open-label, multicenter Phase 3 trial will compare VT3989 with Investigator's choice of gemcitabine or vinorelbine in adults with advanced epithelioid pleural mesothelioma whose disease progressed after prior platinum-based systemic chemotherapy and immunotherapy.

Detailed description

Approximately 350 participants will be randomized 1:1 to VT3989 (Arm A) or Investigator's choice chemotherapy with gemcitabine or vinorelbine (Arm B). VT3989 will be administered orally at 100 mg once daily for 2 weeks on treatment followed by 2 weeks off treatment in each 4-week cycle. Comparator treatment will be gemcitabine or vinorelbine using the protocol-specified regimen or local prescribing/institutional practice. The trial includes screening, treatment, safety follow-up, and survival follow-up periods. A QTc Sub-Study will evaluate cardiac repolarization using time-matched pharmacokinetic samples and ECGs in approximately 25 Arm A participants. Overall survival is the primary endpoint; BICR-assessed progression-free survival is the key secondary endpoint.

Interventions

DRUGVT3989

• 100 mg orally once daily for 2 weeks on treatment followed by 2 weeks off treatment (2W/2W) in each 4-week cycle

DRUGgemcitabine

• 1,000 mg/m2 IV on Days 1 and 8 of each 3-week cycle, or per local prescribing information/institutional practice

DRUGVinorelbine

• 25-30 mg/m2 IV on Days 1 and 8 of each 3-week cycle, or per local prescribing information/institutional practice

Sponsors

Vivace Therapeutics, Inc
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Participants will be randomized 1:1 to VT3989 or Investigator's choice chemotherapy (gemcitabine or vinorelbine).

Eligibility

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

Inclusion criteria

* Male or female, age 18 years or older at informed consent. * Pathologically confirmed advanced epithelioid pleural mesothelioma previously treated with platinum-based systemic chemotherapy and immunotherapy, given sequentially or concurrently. * Radiologically measurable disease by modified RECIST v1.1 or RECIST v1.1. * ECOG: 0-1. * Adequate organ functions, including the liver, kidneys, and hematopoietic system.

Exclusion criteria

* Active brain metastases or primary CNS (central nervous system) tumors. * History of leptomeningeal metastases * Active or chronic, uncontrolled bacterial, viral, or fungal infection(s) requiring systemic therapy * Known HIV positive or active Hepatitis B or Hepatitis C * Clinically significant cardiovascular disease and prior exposure to cardiotoxic agents * Corrected QT (QTcF) interval \> 470 msec (using Fridericia's correction formula). * Women who are pregnant or breastfeeding * Non-pleural mesothelioma at initial diagnosis or an aggressive histologic type such as sarcomatoid or biphasic mesothelioma. * Prior treatment with a TEAD inhibitor, including VT3989 or another agent targeting the same molecular pathway. * Prior receipt of both comparator treatments, gemcitabine and vinorelbine, alone or in combination, or known hypersensitivity to both. A participant who received only one comparator may enroll but must not be assigned to that same comparator.

Design outcomes

Primary

MeasureTime frameDescription
Overall Survival (OS)Approximately 32-35 months after first randomizationTime from randomization to death from any cause. Participants without an observed death will be censored at the last date known alive or the analysis cut-off date, whichever is earlier.

Secondary

MeasureTime frameDescription
Progression-Free Survival by BICRFrom randomization through radiologic progression, death, up to approximately 3 years or moreTime from randomization to the first BICR-assessed radiologic progressive disease or death, using protocol-defined censoring rules.
Treatment-Emergent Adverse Events and Serious Adverse EventsFrom first dose through the safety follow-up visit, (28 days after the last dose), up to approximately 3 years or more.Incidence and severity of Treatment-Emergent Adverse Events and Serious Adverse Events
Disease-related symptoms and health-related quality of life outcomesBaseline through treatment and protocol-specified follow-up; up to approximately 3 years or moreDisease-related symptoms, treatment side effects, functioning, and health-related quality of life outcomes and time to deterioration.
Overall Response Rate by BICRTumor assessments during treatment and applicable follow-up; up to approximately 3 years or moreOverall Response Rate by BICR Proportion with best overall response of complete response or partial response by RECIST v1.1 and/or modified RECIST v1.1, assessed by BICR.
Duration of ResponseFrom first documented response through progression, death, or analysis cut-off; up to approximately 3 years or moreAmong participants with a complete or partial response, time from first documented response to progressive disease or death, with protocol-defined censoring.
Disease Control Rate by BICRTumor assessments during treatment and applicable follow-up; up to approximately 3 years or moreProportion with best overall response of complete response, partial response, or stable disease by RECIST v1.1 and/or modified RECIST v1.1, assessed by BICR.
Time to ResponseFrom randomization to first documented response; up to approximately 3 years or moreTime from randomization to the first documented complete or partial response by RECIST v1.1 and/or modified RECIST v1.1.
EORTC QLQ-LC13Baseline through treatment and protocol-specified follow-up; up to approximately 3 years or moreLung cancer- and treatment-related symptoms using the EORTC Quality of Life Questionnaire Lung Cancer Module 13.
EQ-5D-5LBaseline through treatment and protocol-specified follow-up; up to approximately 3 years or moreHealth status and health-related quality of life using the EuroQol 5 Dimension-5 Levels instrument.
Time to DeteriorationFrom baseline/randomization through protocol-defined deterioration; up to approximately 3 years or moreTime to protocol-defined deterioration in disease-related symptoms and health-related quality of life; detailed definition will be specified in the Statistical Analysis Plan.

Contacts

CONTACTArick Wong
vt3989-003@vivacetherapeutics.com650-666-2753
CONTACTDereck Amakye
info@vivacetherapeutics.com650-666-2753

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 18, 2026