Study of CB-839 in Combination w/ Paclitaxel in Participants of African Ancestry and Non-African Ancestry With Advanced Triple Negative Breast Cancer (TNBC)

NCT ID: NCT03057600

Last Updated: 2022-09-28

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

52 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-05-01

Study Completion Date

2019-11-25

Brief Summary

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CX-839-007 is an open-label Phase 2 study of the combination of CB-839 with paclitaxel in participants of African ancestry and non-African ancestry with advanced triple negative breast cancer. Multiple single-arm cohorts will be enrolled in which 800 mg twice daily (BID) CB-839 will be administered in combination with the full approved dose of paclitaxel.

Detailed Description

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Participants will be enrolled into 4 cohorts, as follows:

* Cohort 1: patients of African ancestry with 2 or more lines of prior therapy for metastatic disease
* Cohort 2: patients of African ancestry with no prior lines of therapy for metastatic disease
* Cohort 3: same as cohort 1 but in patients of non-African ancestry
* Cohort 4: same as cohort 2 but in patients of non-African ancestry

Conditions

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Triple Negative Breast Cancer TNBC - Triple-Negative Breast Cancer

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Participants will be assigned to one of 4 arms depending on the number of prior lines of therapy they have received and whether or not they have African ancestry
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Cohort 1 - African ancestry, 3rd line+

Intervention = Paclitaxel- CB-839 (Pac-CB) combination

1. Participants must self-identify as African ancestry (includes African American).
2. At least 2 prior lines of systemic therapy for advanced/metastatic disease including a taxane.

* Prior taxane (paclitaxel, docetaxel, or nab-paclitaxel) for advanced/metastatic disease is required but must not have been received in the immediate prior line of therapy.
* Systemic neoadjuvant and/or adjuvant therapy is considered a line of therapy for advanced/metastatic disease if the time to recurrence from completion of treatment was ≤ 12 mo.

Group Type EXPERIMENTAL

Paclitaxel

Intervention Type DRUG

standard weekly paclitaxel in 28-day cycles

CB-839

Intervention Type DRUG

CB-839 administered as oral tablets twice daily (BID)

Cohort 2 - African ancestry, 1st line

Intervention = Pac-CB combination

1. Participants must self-identify as African ancestry (includes African American).
2. No prior systemic therapy for advanced or metastatic disease.

* Systemic neoadjuvant or adjuvant therapy, including taxane, is allowed if time to recurrence was \> 12 mo.

Group Type EXPERIMENTAL

Paclitaxel

Intervention Type DRUG

standard weekly paclitaxel in 28-day cycles

CB-839

Intervention Type DRUG

CB-839 administered as oral tablets twice daily (BID)

Cohort 3 - Non-African ancestry, 3rd line+

Intervention = Pac-CB combination

1. Participants do not self-identify as African ancestry.
2. Otherwise have the same criteria as Cohort 1.

Group Type EXPERIMENTAL

Paclitaxel

Intervention Type DRUG

standard weekly paclitaxel in 28-day cycles

CB-839

Intervention Type DRUG

CB-839 administered as oral tablets twice daily (BID)

Cohort 4 - Non-African ancestry, 1st line

Intervention = Pac-CB combination

1. Participants do not self-identify as African ancestry.
2. Otherwise have the same criteria as Cohort 2.

Group Type EXPERIMENTAL

Paclitaxel

Intervention Type DRUG

standard weekly paclitaxel in 28-day cycles

CB-839

Intervention Type DRUG

CB-839 administered as oral tablets twice daily (BID)

Interventions

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Paclitaxel

standard weekly paclitaxel in 28-day cycles

Intervention Type DRUG

CB-839

CB-839 administered as oral tablets twice daily (BID)

Intervention Type DRUG

Other Intervention Names

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Taxane telaglenastat

Eligibility Criteria

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Inclusion Criteria

* Meets criteria for 1 of the 4 defined study cohorts
* TNBC, defined as estrogen receptor (ER) and progesterone receptor (PR) negative (\< 1% by immunohistochemistry) and human epidermal growth factor receptor 2 (HER2)-negative (immunohistochemistry 0 to 1+ or fluorescence in situ hybridization \[FISH\] negative)
* Metastatic disease or locally-advanced disease not amenable to curative intent treatment
* Adequate hepatic, renal, cardiac, and hematologic function
* Eastern Cooperative Oncology Group (ECOG) performance status 0-1
* Recovery to baseline or ≤ Grade 1 Common Terminology Criteria for Adverse Events (CTCAE) version.4.0

Exclusion Criteria

* Known brain metastases or central nervous system (CNS) cancer unless adequately treated with radiotherapy and/or surgery and stable for ≥ 2 mo
* Unable to receive oral medications
* Known hypersensitivity to Cremophor®-based agents
* Major surgery within 28 days of Cycle 1 Day 1
Minimum Eligible Age

18 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Calithera Biosciences, Inc

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Sam Whiting, MD, PhD

Role: STUDY_DIRECTOR

Calithera Biosciences, Inc

Locations

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University of Alabama at Brimingham

Birmingham, Alabama, United States

Site Status

University of South Alabama, Mitchell Cancer Institute

Mobile, Alabama, United States

Site Status

Yale Cancer Center

New Haven, Connecticut, United States

Site Status

Georgetown University - Lombardi Comprehensive Cancer Center

Washington D.C., District of Columbia, United States

Site Status

Washington Cancer Institute

Washington D.C., District of Columbia, United States

Site Status

University of Miami

Miami, Florida, United States

Site Status

Moffitt Cancer Center and Research Institute

Tampa, Florida, United States

Site Status

University Cancer and Blood Center

Athens, Georgia, United States

Site Status

Winship Cancer Institute - Emory University

Atlanta, Georgia, United States

Site Status

Northwest Georgia Oncology

Marietta, Georgia, United States

Site Status

Ochsner Clinic Foundation

New Orleans, Louisiana, United States

Site Status

Weinberg Cancer Institute at Franklin Square

Baltimore, Maryland, United States

Site Status

Henry Ford Hospital

Detroit, Michigan, United States

Site Status

Saint Louis University

St Louis, Missouri, United States

Site Status

JTCC at Hackensack UMC

Hackensack, New Jersey, United States

Site Status

Columbia University

New York, New York, United States

Site Status

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Site Status

Magee Womens Hospital - UPMC

Pittsburgh, Pennsylvania, United States

Site Status

Charleston Hematology Oncology Associates

Charleston, South Carolina, United States

Site Status

Greenville Health System (GHS) Cancer Institute

Greenville, South Carolina, United States

Site Status

West Cancer Center

Germantown, Tennessee, United States

Site Status

Baylor College of Medicine

Houston, Texas, United States

Site Status

MD Anderson

Houston, Texas, United States

Site Status

Northwest Medical Specialties, PLLC

Tacoma, Washington, United States

Site Status

Froedtert and the Medical College of Wisconsin

Milwaukee, Wisconsin, United States

Site Status

Countries

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United States

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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CX-839-007

Identifier Type: -

Identifier Source: org_study_id

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