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A Study of PRT1419 in Patients With Advanced Solid Tumors

A Phase 1, Open-Label, Multicenter, Dose Escalation Study of PRT1419 in Patients With Advanced Solid Tumors

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04837677
Enrollment
26
Registered
2021-04-08
Start date
2021-08-11
Completion date
2023-02-06
Last updated
2023-03-15

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

Conditions

Breast Cancer, Cervical Cancer, Esophageal Cancer, Head and Neck Cancer, Lung Cancer, Melanoma, Sarcoma

Keywords

MCL1

Brief summary

This is a Phase 1 dose-escalation study of PRT1419, a myeloid cell leukemia 1 (MCL1) inhibitor, in patients with advanced solid tumors. The purpose of this study is to define the dosing schedule, maximally tolerated dose and/or estimate the optimal biological dose to be used in subsequent development of PRT1419.

Detailed description

This is a multicenter, open-label, dose-escalation Phase 1 study of PRT1419, a MCL1 inhibitor, evaluating patients with relapsed or refractory solid tumors, including breast, lung, sarcoma and melanoma as part of a 28-day treatment cycle. The study will employ a 3+3 dose escalation design. The dose may be escalated until a dose limiting toxicity is identified.

Interventions

PRT1419 will be administered by intravenous infusion

Sponsors

Prelude Therapeutics
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2 * Adequate organ function (bone marrow, hepatic, renal, cardiovascular) * Left ventricular ejection fraction of ≥ 50% * Female patients of childbearing potential must have a negative pregnancy test within 7 days of the start of treatment and must agree to use a highly effective method of contraception during the trial * Patients must have recovered from the effects of any prior cancer related therapy, radiotherapy or surgery (toxicity ≤ Grade 1) * All patients on prior investigational agents must wait at least 5 half-lives of the agent in question, or 28 days, whichever is longer before study entry * Most recent lab values meet the following criteria: * Absolute neutrophil count \> 1.0 x 10\^3/μL; * Platelet count \> 75,000/μL; * Hemoglobin \> 9.0 g/dL * Histologically confirmed advanced or metastatic solid tumor indicated below that is relapsed, refractory, or intolerant to available therapies with known benefit: * Sarcoma not amendable to curative treatment with surgery or radiotherapy; * Melanoma (non-resectable or metastatic); * Small cell lung cancer (extensive-stage); * Non-small cell lung cancer; * Triple negative breast cancer (histopathologically or cytologically confirmed). * Esophageal cancer * Cervical cancer * Head and neck cancer

Exclusion criteria

* Known hypersensitivity to any of the components of PRT1419 * Primary malignancies of the CNS, or uncontrolled CNS metastases, including impending spinal cord compression * Female patients who are pregnant or lactating * Inflammatory disorders of the gastrointestinal tract, or subjects with GI malabsorption * Mean QTcF interval of \>480 msec * History of heart failure, additional risk factors for arrhythmias or requiring concomitant medications that prolong the QT/QTc interval * HIV positive; known active hepatitis B or C * Uncontrolled intercurrent illnesses * Treatment with strong inhibitors of CYP2C8 * Prior exposure to an MCL1 inhibitor * History of another malignancy except: * Malignancy treated with curative intent with no known active disease for \>2 years at study entry; * Adequately treated non-melanoma skin cancer or lentigo maligna without evidence of disease; * Adequately treated carcinoma in situ without evidence of disease; * Other concurrent low-grade malignancies (i.e chronic lymphocytic leukemia (Rai 0)) may be considered after consultation with Sponsor.

Design outcomes

Primary

MeasureTime frameDescription
Dose limiting toxicities (DLT) of PRT1419Baseline through Day 28Dose limiting toxicities will be evaluated through the first cycle
Maximally tolerated dose (MTD) and/or optimal biological dose (OBD)Baseline through approximately 2 yearsThe MTD and/or OBD will be established for further investigation in participants with advanced solid tumors.
Recommended phase 2 dose (RP2D) and schedule of PRT1419Baseline through approximately 2 yearsThe RP2D will be established for further investigation in participants with advanced solid tumors.

Secondary

MeasureTime frameDescription
Safety and tolerability of PRT1419: AEs, SAEs, CTCAE assessmentsBaseline through approximately 2 yearsSafety and tolerability will be assessed by recording adverse events (AEs) and serious adverse events (SAEs) according to Common Terminology Criteria for Adverse Events (CTCAE)
Progression-free survivalBaseline through approximately 2 yearsProgression-free survival will be calculated from the first administration of PRT1419 until death or until the criteria for disease progression are met
Pharmacokinetic profile of PRT1419: maximum observed plasma concentrationBaseline through approximately 2 yearsPRT1419 pharmacokinetics will be calculated including the maximum observed plasma concentration
Anti-tumor activity of PRT1419: measurement of objective responsesBaseline through approximately 2 yearsAnti-tumor activity of PRT1419 will be based on the measurement of objective responses

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 9, 2026