Study of Tissue Samples From Women Treated With Paclitaxel for Breast Cancer on Clinical Trial CALGB-9344 or CALGB-9741
August 7, 2017 updated by: Alliance for Clinical Trials in Oncology
Intrinsic Breast Cancer Subtypes and Benefit of Paclitaxel in CALGB 9344 and Dose Dense Therapy in CALGB 9741
RATIONALE: Studying the genes expressed in samples of tumor tissue from patients with cancer may help doctors identify biomarkers related to cancer.
PURPOSE: This research study is looking at tissue samples from women treated with paclitaxel for breast cancer on clinical trial CALGB 9344 or CALGB 9741.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
OBJECTIVES:
Primary
- To determine whether subtype-specific treatment effects correlate with disease-free survival (DFS), as determined by a significant interaction between PAM50-based intrinsic subtypes, and (a) paclitaxel benefit in CLB-9344 and (b) dose density in CALGB-9741.
- To determine whether subtype-specific treatment effects correlate with DFS for the HER2-negative subsets in CALGB-9344 and CALGB-9741, as determined by analysis of tissue microarray (TMA) and slides.
- To determine the relationship between PAM50-defined risk of relapse (ROR) score and DFS in CALGB-9344 and CALGB-9741.
- To evaluate the relationship between PAM50-defined ROR score and DFS in the HER2-negative subsets in CALGB-9344 and CALGB-9741, as determined by analysis of TMA and slides.
- To examine the relationship between PAM50-defined proliferation score and DFS in CALGB-9344 and CALGB-9741 in multivariate Cox-proportional hazards models including the following covariates: (a) number of positive lymph nodes, square root transformation; (b) menopausal status (pre versus peri/post); CALGB-9344 only; c) dose of doxorubicin hydrochloride (60/75/90 mg/m^2); and CALGB-9741 only; and (d) sequence of treatment.
Secondary
- To evaluate overall survival (OS) in a Cox-proportional hazards-regression model for testing the interaction between ROR with (a) paclitaxel benefit in CALGB-9344 and (b) dose density in CALGB-9741.
- To test for a significant interaction between ROR and paclitaxel benefit at 5-year and 10-year DFS.
- To test whether 5-year and 10-year DFS rates can be associated to a significant interaction between the proliferation score with (a) paclitaxel benefit in CALGB-9344 and (b) dose density in CALGB-9741.
OUTLINE: Tissue blocks from CALGB-9344 and CALGB-9741 are utilized to purify RNA to be tested in the PAM50 assay (a 50-gene quantitative PCR assay, that provides an intrinsic breast cancer subtype diagnosis) and generate risk of relapse (ROR) scores.
The assay identifies five subtypes with the following characteristics:
- Luminal A: This subtype expresses estrogen receptor (ER) accompanied by high levels of ER-associated gene expression. Genes associated with cell cycle activation are not highly expressed and this tumor type is only very rarely HER2+. This subgroup has the most favorable prognosis and is enriched for endocrine therapy responsive tumors.
- Luminal B: This subtype expresses ER and ER-associated gene expression but to a lower extent. Genes associated with cell cycle activation are highly expressed and this tumor type can be HER2+ (~20%) or HER2- thus, from the clinical perspective, Luminal B tumors are at least two further subtypes defined by the presence or absence of HER2-gene amplification. The prognosis is unfavorable (despite ER expression) and endocrine therapy responsiveness is generally diminished.
- Basal-like: This subtype is ER-, is almost always clinically HER2- and expresses a suite of "basal" biomarkers. Genes associated with cell cycle activation are highly expressed.
- HER2-enriched: This subtype is ER- and is HER2+ in the majority of cases. Genes associated with cell cycle activation are highly expressed and these tumors have a poor outcome. Tumors within this classification that are clinically HER2- fall into a class previously described as double-negative non-basal.
- Normal-like: A tumor subtype diagnosis cannot be provided from samples that exhibit a normal-like profile. Since this profile was trained on samples without cancer, "normal-like" implies there are too few tumor cells in the sample to make a true tumor subtype diagnosis.
PROJECTED ACCRUAL: A total of 2,245 tissue blocks from CALGB-9544 and 1,432 tissue blocks from CALGB-9741 will be accrued for this study.
Study Type
Observational
Enrollment (Anticipated)
3677
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
Female
Sampling Method
Non-Probability Sample
Study Population
Patients diagnosed with breast cancer previously treated with paclitaxel and enrolled on CALGB-9344 or CALGB-9741.
Description
DISEASE CHARACTERISTICS:
Diagnosis of stage II or IIIA breast cancer
- Received treatment with paclitaxel on clinical trial CALGB-9344 or CALGB-9741
- Tissue blocks available
PATIENT CHARACTERISTICS:
- See Disease Characteristics
- Pre-, peri-, or postmenopausal
PRIOR CONCURRENT THERAPY:
- See Disease Characteristics
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Case-Only
- Time Perspectives: Retrospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
|---|---|
|
Group 1
Tissue blocks from CALGB-9344 and CALGB-9741 are utilized to purify RNA to be tested in the PAM50 assay (a 50-gene quantitative PCR assay, that provides an intrinsic breast cancer subtype diagnosis) and generate risk of relapse (ROR) scores.
For more information, see Details section.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
|---|---|
|
Disease-free survival (DFS)
Time Frame: Up to 10 years
|
Up to 10 years
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
|---|---|
|
Overall survival
Time Frame: Up to 10 years
|
Up to 10 years
|
|
5- and 10-year DFS rates
Time Frame: Up to 10 years
|
Up to 10 years
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
April 1, 2009
Primary Completion (Actual)
May 1, 2010
Study Completion (Actual)
February 1, 2012
Study Registration Dates
First Submitted
October 6, 2009
First Submitted That Met QC Criteria
October 6, 2009
First Posted (Estimate)
October 7, 2009
Study Record Updates
Last Update Posted (Actual)
August 8, 2017
Last Update Submitted That Met QC Criteria
August 7, 2017
Last Verified
August 1, 2017
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- CALGB-159905C-ICSC
- CDR0000647570 (Registry Identifier: NCI Physician Data Query)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.