Study of AVZO-021 in Patients With Advanced Solid Tumors

Avenzo Therapeutics

Status and phase: Enrolling; Phase 2; Phase 1

Conditions: Advanced Solid Tumor

Treatments: Drug: Ribociclib; Drug: Letrozole; Drug: AVZO-021; Drug: Palbociclib; Drug: Carboplatin; Drug: Fulvestrant; Drug: Abemaciclib

Study type: Interventional

Funder types: Industry

Identifiers

NCT05867251

AVZO-021-1001

Details and patient eligibility

About

This study, the first clinical trial of AVZO-021, aims to determine the safety, tolerability, pharmacokinetics, pharmacodynamics, maximum tolerated dose, and anti-tumor effects of AVZO-021 in patients with advanced solid tumors. AVZO-021 is an oral medication that inhibits cyclin-dependent kinase 2 (CDK 2).

Full description

AVZO-021 is a compound being developed for the treatment of patients with advanced solid tumors, specifically, HR+/HER2- breast cancer and cyclin E1 (CCNE1) altered malignancies. AVZO-021 is a selective and potent cyclin-dependent kinase 2 (CDK2) inhibitor, which plays an important role in cell cycle regulation. This is a Phase 1/2 first-in-human, open-label, nonrandomized, multicenter study of AVZO-021. Phase 1 is a dose-escalation phase aimed at assessing the safety and tolerability of AVZO-021 and determining the recommended phase 2 dose (RP2D) as monotherapy and combination therapy. Phase 2 is a dose-expansion phase that will be conducted to assess the antitumor activity of AVZO-021 as monotherapy and combination therapy.

Enrollment: 430 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

Key Inclusion Criteria:

1. Male or female aged ≥18 years old at screening with Eastern Cooperative Oncology Group (ECOG) 0-1.

2. Disease-related inclusion criteria by study phase and part:

   i) Phase 1a Monotherapy Dose Escalation: Locally advanced or metastatic solid tumor associated with dependency on CDK2 (eg, HR+/HER2- breast cancer, CCNE1 amplified solid tumors, FBXW7 loss of function mutation/deletion and retinoblastoma protein (Rb)1 loss of function mutation/deletion), for which standard therapies are no longer effective, appropriate, or safe in the opinion of the investigator (Cohort 1A).

   ii) Phase 1b Combination Dose Escalation: Histologically or cytologically confirmed diagnosis of locally advanced or metastatic HR+/HER2- (HER2-low may be allowed if failed standard of care therapy) breast cancer in patients who have been previously treated with inhibitor of CDK4/6 and endocrine therapy (Cohorts 1B1, 1B2, 1B3, and 1B4); or Histologically or cytologically confirmed diagnosis of CCNE1 amplified locally advanced or metastatic EOC in patients who are platinum-refractory or platinum-resistant (Cohort 1C).

   iii) Phase 2a Monotherapy dose expansion: Histologically or cytologically confirmed diagnosis of locally advanced or metastatic CCNE1 amplified solid tumors Cohort 2A

   iv) Phase 2b Combination dose expansion: Histologically or cytologically confirmed diagnosis of locally advanced or metastatic HR+/HER2- (HER2-low may be allowed if failed standard of care therapy) breast cancer who have been previously treated with no more than 1 prior CDK4/6 inhibitor and endocrine therapy (Cohorts 2B1, 2B2, 2B3, and 2B4); or Histologically or cytologically confirmed diagnosis of CCNE1 amplified locally advanced or metastatic EOC in patients who are platinum-refractory or platinum-resistant (Cohort 2C).

3. No more than 2 prior cytotoxic chemotherapy regimens for locally advanced/metastatic disease (prior chemotherapy in the adjuvant or neoadjuvant setting allowed if >12 months prior to starting AVZO-021 treatment and is not considered a prior line).

4. Measurable disease as determined by RECIST version 1.1.

5. Adequate bone marrow and organ function.

6. Ability to swallow capsules or tablets.

Key Exclusion Criteria:

1. Received an investigational agent or anticancer therapy within 2 weeks, or 5 half-lives of the drug, whichever is shorter, prior to planned start of AVZO-021.
2. Received any CDK2 inhibitor, protein kinase membrane associated tyrosine/threonine 1 (PKMYT1) inhibitor, or WEE1 inhibitor anticancer therapy.
3. Undergone major surgery within 4 weeks prior to planned start of AVZO-021.
4. Received radiotherapy for palliation within 7 days of the first dose of study treatment, unless specified otherwise in the protocol.
5. Active CNS metastases or confirmed leptomeningeal disease are not eligible.
6. Unresolved toxicities from prior therapy greater than Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 Grade >1 at the time of starting study treatment.
7. Clinically unstable cardiac function as described in the protocol.
8. Any active or chronic infection/disease that compromises the immune system.
9. Current treatment with strong or moderate cytochrome P450 (CYP)3A4 inhibitors or inducers.
10. Active second malignancy unless in remission with life expectancy > 2 years and with documented sponsor approval.
11. Pregnancy, lactation, or plans to breastfeed during the study or within 6 months of the last dose of study intervention.

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Sequential Assignment

Masking: None (Open label)

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430 participants in 4 patient groups

Phase 1, monotherapy (Part 1A)

Experimental group

Description:

Escalating doses of once daily, oral AVZO-021 in 28-day cycles.

Treatment:

Drug: AVZO-021

Phase 1, combination (Parts 1B and 1C)

Experimental group

Description:

Escalating doses of once daily, oral AVZO-021 in 28-day cycles starting at least 1 DL below the monotherapy MTD/RP2D dose in combination with: 1B1) fulvestrant 1B2) palbociclib plus either fulvestrant or letrozole 1B3) ribociclib plus either fulvestrant or letrozole 1B4) abemaciclib plus either fulvestrant or letrozole 1C) carboplatin

Treatment:

Drug: Carboplatin

Drug: Abemaciclib

Drug: Fulvestrant

Drug: Palbociclib

Drug: AVZO-021

Drug: Letrozole

Drug: Ribociclib

Phase 2, monotherapy (Part 2A)

Experimental group

Description:

Oral doses of AVZO-021 in 28-day cycles at the RP2D determined in Part 1A.

Treatment:

Drug: AVZO-021

Phase 2, combination (Parts 2B and 2C)

Experimental group

Description:

Oral doses of AVZO-021 in 28-day cycles at the RP2D determined in Parts 1B/1C, in combination with: 2B1) fulvestrant 2B2) palbociclib plus either fulvestrant or letrozole 2B3) ribociclib plus either fulvestrant or letrozole 2B4) abemaciclib plus either fulvestrant or letrozole 2C) carboplatin

Treatment:

Drug: Carboplatin

Drug: Abemaciclib

Drug: Fulvestrant

Drug: Palbociclib

Drug: AVZO-021

Drug: Letrozole

Drug: Ribociclib