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Studying Changes in Breast Density in Patients With Early-Stage Breast Cancer Treated With Metformin Hydrochloride or Placebo on CAN-NCIC-MA.32

9 juli 2013 bijgewerkt door: Cancer and Leukemia Group B

Change in Mammographic Density With Metformin Use: A Companion Study to NCIC Study MA.32

RATIONALE: Learning about the effect of metformin hydrochloride in breast density of women with early-stage breast cancer may help plan treatment.

PURPOSE: This trial studies changes in breast density in patients with early-stage breast cancer treated with metformin hydrochloride or placebo on CAN-NCIC-MA.32.

Studie Overzicht

Toestand

Onbekend

Conditie

Borstkanker

Interventie / Behandeling

Gedetailleerde beschrijving

OBJECTIVES:

Primary

To evaluate the change in percent mammographic density in contralateral (unaffected breast) from prior to the initiation of metformin hydrochloride (metformin) or placebo treatment through one year of therapy in patients with hormone receptor-negative breast cancer (i.e., not on endocrine therapy).

Secondary

To evaluate the change in percent breast density in contralateral (unaffected breast) from prior to the initiation of metformin or placebo treatment through two years of therapy in patients with hormone receptor-negative breast cancer (i.e., not on endocrine therapy).
To evaluate whether baseline mammographic density correlates with baseline of fasting plasma insulin, glucose levels, and Homeostasis Model Assessment (HOMA) (collected on the treatment protocol CAN-NCIC-MA.32) (MA.32).
To evaluate whether changes in dense area in response to metformin therapy from pre-treatment through two years of therapy correlate with changes in fasting plasma insulin, glucose levels, and HOMA (collected on the treatment protocol MA.32) over the same time period.
To explore whether change in mammographic density for women on metformin is associated with risk of second primary breast cancer.

OUTLINE: Patients' mammograms taken at baseline and at approximately 1 and 2 years of metformin or placebo treatment are retrieved and analyzed for breast-density change. Pre-menopausal patients' menstrual cycle information is also collected at baseline and every 6 months for 2 years.

Studietype

Observationeel

Inschrijving (Verwacht)

458

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 74 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Vrouw

Beschrijving

DISEASE CHARACTERISTICS:

Patients must either be concurrently enrolling or previously enrolled to Canada (CAN) National Cancer Institute of Canada (NCIC) study MA.32 (CAN-NCIC-MA.32) (MA.32); eligible patients may be either pre- or post-menopausal
Patients must have hormone receptor-negative breast cancer
Patients must have breast density ≥ 25% (correlating with the Breast Imaging-Reporting and Data [BIRAD]-2 category of "scattered fibroglandular densities" or greater)
Baseline digital mammograms taken within 12 months prior to registration to MA.32, with at least a craniocaudal (CC) view used for enrollment to MA.32 must be available for submission; if the patient has previously enrolled to MA.32 and one year has elapsed from baseline mammograms, one-year mammograms must also be available for submission
Contralateral unaffected breast in place (with no prior cancer or radiation, no implants, and no plan for breast surgery on contralateral breast over the course of the study); women with a prior biopsy on the unaffected breast are eligible

PATIENT CHARACTERISTICS:

Not specified

PRIOR CONCURRENT THERAPY:

See Disease Characteristics
Women receiving endocrine therapy (e.g., tamoxifen, aromatase inhibitors) are not eligible

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Change in percent mammographic breast density in contralateral (unaffected) breast from baseline to 1 year using two-sample t-test or Wilcoxon rank-sum test

Secundaire uitkomstmaten

Uitkomstmaat
Change in percent mammographic breast density in contralateral (unaffected) breast from baseline to 2 years using two-sample t-test
Correlation between baseline mammographic density and baseline plasma fasting insulin, glucose levels, and HOMA using a scatter plot, correlation-coefficient estimation, and linear-regression method
Correlation of changes in dense area in response to metformin therapy from pre-treatment to on treatment (at year 1 and year 2) with plasma fasting insulin, glucose levels, and HOMA using simple linear-regression method
Correlation between mammographic density and the incidence of second primary breast cancer using correlation coefficient and scatter plot

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Cancer and Leukemia Group B

Medewerkers

National Cancer Institute (NCI)

Onderzoekers

Hoofdonderzoeker: Marie E. Wood, MD, University of Vermont

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start

1 augustus 2012

Primaire voltooiing (Verwacht)

1 april 2013

Studie voltooiing

7 december 2022

Studieregistratiedata

Eerst ingediend

14 augustus 2012

Eerst ingediend dat voldeed aan de QC-criteria