A First-in-human Study of PARP1 Selective Inhibitor, IMP1734, in Participants With Advanced Solid Tumors

Eikon Therapeutics

Status and phase: Enrolling; Phase 2; Phase 1

Conditions: Advanced Solid Tumor

Treatments: Drug: IMP1734

Study type: Interventional

Funder types: Industry

Identifiers

NCT06253130

2023-509230-19 (EudraCT Number)

EIK1003-001 (IMP1734-101)

Details and patient eligibility

About

This study will evaluate the preliminary efficacy of IMP1734 in patients with recurrent advanced/metastatic breast cancer, ovarian cancer and metastatic castrate resistant prostate cancer (mCRPC) with deleterious/suspected deleterious mutations of select homologous recombination repair (HRR) genes.

Full description

This study will evaluate the safety, tolerability and preliminary efficacy of IMP1734 as monotherapy in patients with recurrent, advanced/metastatic solid tumors. The study consists of 3 parts: Dose escalation, Dose Optimization and Dose expansion.

In dose escalation (Part1), the study will identify the maximum tolerated dose (MTD) or maximum achievable dose (MAD) in solid tumor.

In dose optimization (Part 2), the study will further evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and anti-tumor activity of select doses of IMP1734.

In dose expansion (Part 3) the recommended dose escalation (RDE) of IMP1734 monotherapy will be evaluated in patients with recurrent, advanced/metastatic breast cancer, ovarian cancer and mCRPC with deleterious/suspected deleterious mutations of select homologous recombination repair (HRR) gene mutations.

Enrollment: 70 estimated patients

Sex: All

Ages: 18 to 89 years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria

• Breast cancer; must have received at least one prior chemotherapy in neoadjuvant/adjuvant/metastatic setting, must have received hormonal therapy if HR+,
• HGSOC or high grade endometrioid EOC, fallopian tube or primary peritoneal cancer; must have received at least one prior platinum-based chemotherapy for advanced disease
• mCRPC with ongoing ADT, must have received NHA and up to 1 prior line of taxane chemotherapy
• Age ≥ 18 years at the time of informed consent
• Eastern Cooperative Oncology Group (ECOG) performance status ≤1
• Adequate organ function
• Life expectancy ≥ 12 weeks
• Should have evaluable disease as defined by RECIST1.1 and/or CA125 or PSA
• Female subjects of childbearing potential and male subjects must agree to use an effective method of contraception from study entry up to 6 months after the last dose of IMP1734
• deleterious or suspected deleterious germline or somatic mutations of select HRR genes
• up to 1 prior line of PARP inhibitor containing treatment

Key Exclusion Criteria:

• Any investigational or approved anti-cancer therapies administered within 28 days/ before the first dose of IMP1734

• Have received prior PARP1 selective inhibitors

• Mean resting QTcF > 470 ms or QTcF < 340 ms

• Active or untreated central nervous system (CNS) metastases and/or carcinomatous meningitis.

• Infections

  • An active hepatitis B/C infection

• Any known predisposition to bleeding

• Unable to swallow oral medications OR have malabsorption syndrome or any other uncontrolled gastrointestinal condition that might impair the bioavailability

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Sequential Assignment

Masking: None (Open label)

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70 participants in 1 patient group

Cohort 1

Experimental group

Description:

IMP1734 monotherapy; oral tablet(s) daily (except for the single-dose period). The maximum trial duration is 3 years after the last participant's first treatment in the trial.

Treatment:

Drug: IMP1734