A Phase 1/1b Study of IAM1363 in HER2 Cancers

Iambic Therapeutics

Status and phase: Enrolling; Phase 1

Conditions: HER2-positive Breast Cancer; HER2 + Gastric Cancer; HER2-positive Gastroesophageal Cancer; HER2 + Breast Cancer; HER2; Brain Metastases from HER2 and Breast Cancer; HER2-Positive Solid Tumors; Brain Metastases from Solid Tumors; HER2-positive Colorectal Cancer; HER2-positive Bladder Cancer; CNS Metastases; NSCLC (non-small Cell Lung Cancer); HER2 Mutation-Related Tumors

Treatments: Drug: IAM1363

Study type: Interventional

Funder types: Industry

Identifiers

NCT06253871

IAM1363-01

Details and patient eligibility

About

This is a Phase 1/1b open-label, multi-center dose escalation and dose optimization study designed to evaluate the safety and preliminary efficacy of IAM1363 in participants with advanced cancers that harbor HER2 alterations.

Full description

This is a Phase 1/1b open-label, multi-center study, designed to evaluate IAM1363 in participants with advanced cancers that harbor HER2 alterations.

This study consists of the following 3 parts, which are described in further detail below:

• Part 1 (Monotherapy Dose Escalation)
• Part 2 (Dose Optimization)
• Part 3 (Simon 2-Stage Evaluation)

Part 1 will enroll participants with a confirmed, relapsed/refractory malignancy with documented diagnosis of HER2 alterations including participants with brain metastases. Once a provisional maximum tolerated dose (MTD)/recommended Phase 2 dose (RP2D) has been determined, Part 2 will enroll additional cohorts to optimize dose selection and to further evaluate the safety and preliminary efficacy of IAM1363. Following completion of Dose Optimization, Part 3 will be opened to enroll tumor-specific cohorts utilizing a Simon 2-Stage Minimax Design to evaluate IAM1363 at the selected dose(s).

Enrollment: 243 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

• Age ≥ 18 years
• Have relapsed/refractory HER2-altered malignancy
• Have progression of disease after the last systemic therapy, or be intolerant of last systemic therapy
• Have radiographically measurable disease by RECIST v1.1 and/or RANO-BM
• Eastern Cooperative Oncology Group (ECOG) performance score 0-1
• Have adequate baseline hematologic, liver and renal function
• Have left ventricular ejection fraction (LVEF) ≥ 50%

Key Exclusion Criteria:

• Clinically significant cardiac disease
• Infection with human immunodeficiency virus (HIV)-1 or HIV-2. Exception: Patients with well-controlled HIV (e.g., CD4 >350/mm3 and undetectable viral load) are eligible
• Current active liver disease including hepatitis A, hepatitis B , or hepatitis C
• Refractory nausea and vomiting, malabsorption, external biliary shunt, or significant small bowel resection that would preclude adequate absorption
• Uncontrolled diabetes
• History of solid organ transplantation
• History of Grade ≥2 CNS hemorrhage, or any CNS hemorrhage within 28 days before C1D1
• Patients requiring immediate local therapy for brain metastases

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

---

243 participants in 1 patient group

IAM1363 Monotherapy

Experimental group

Description:

Treatment with IAM1363 capsules, dosed orally either once or twice daily in 21-day cycles.

Treatment:

Drug: IAM1363