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A Phase 2, Safety and Efficacy Study of PRT3789 in Combination with Pembrolizumab in Patients with Advanced or Metastatic Solid Tumors with a SMARCA4 Mutation

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-516889-11-00
Acronym
PRT3789-02
Enrollment
29
Registered
2025-04-16
Start date
2025-05-21
Completion date
2025-08-14
Last updated
2025-07-29

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

Conditions

Advanced or Metastatic Solid Tumors with a SMARCA4 Mutation, Esophageal Cancer, non-small cell lung cancer (NSCLC)

Brief summary

Incidence of dose-limiting toxicities, Incidence and severity of adverse events according to the NCI CTCAE v5.0, Objective response rate defined as the proportion of patients with a confirmed best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1, Duration of response defined as the time from the date of the first documented response (complete response or partial response) to the earliest date of disease progression, as determined per investigator assessment by RECIST v1.1, or death due to any cause

Detailed description

Objective response rate defined as the proportion of patients with a best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1 (Part 1 only), Duration of response defined as the time from the date of the first documented response (complete response or partial response) to the earliest date of disease progression, as determined per investigator assessment by RECIST v1.1, or death due to any cause (Part 1 only), Clinical benefit response defined as the proportion of patients with a best overall response of complete response, partial response, or durable stable disease (24 weeks or longer), as determined per investigator assessment by RECIST v1.1, PFS defined as the time from the date of first dose of study treatment to the date of first documented progressive disease, as determined per investigator assessment by RECIST v1.1, or death due to any cause, Overall survival defined as the time from the date of first dose of study treatment to death due to any cause, Incidence and severity of adverse events according to the NCI CTCAE v5.0, Changes in clinical laboratory parameters, Incidence of dose interruptions, dose modifications, and discontinuations due to adverse events, The pharmacokinetics of PRT3789 in combination with pembrolizumab including the maximum observed plasma concentration, time of maximum concentration, AUC, steady state trough concentrations, clearance, accumulation, and half-life

Interventions

DRUGKEYTRUDA 25 mg/mL concentrate for solution for infusion

Sponsors

Prelude Therapeutics Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Incidence of dose-limiting toxicities, Incidence and severity of adverse events according to the NCI CTCAE v5.0, Objective response rate defined as the proportion of patients with a confirmed best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1, Duration of response defined as the time from the date of the first documented response (complete response or partial response) to the earliest date of disease progression, as determined per investigator assessment by RECIST v1.1, or death due to any cause

Secondary

MeasureTime frame
Objective response rate defined as the proportion of patients with a best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1 (Part 1 only), Duration of response defined as the time from the date of the first documented response (complete response or partial response) to the earliest date of disease progression, as determined per investigator assessment by RECIST v1.1, or death due to any cause (Part 1 only), Clinical benefit response defined as the proportion of patients with a best overall response of complete response, partial response, or durable stable disease (24 weeks or longer), as determined per investigator assessment by RECIST v1.1, PFS defined as the time from the date of first dose of study treatment to the date of first documented progressive disease, as determined per investigator assessment by RECIST v1.1, or death due to any cause, Overall survival defined as the time from the date of first dose of

Countries

France, Germany, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026