Changes in Breast Density and Blood Hormone Levels in Postmenopausal Women Receiving Anastrozole or Exemestane for Breast Cancer

Changes in Breast Density and Plasma Hormone Levels After One Year of Aromatase Inhibitor Therapy

RATIONALE: Studying changes in breast density and blood hormone levels in women receiving anastrozole or exemestane for breast cancer may help doctors learn more about the long-term effects of treatment and may help the study of breast cancer in the future.

PURPOSE: This clinical trial is studying changes in breast density and blood hormone levels in postmenopausal women receiving anastrozole or exemestane for breast cancer.

Study Overview

• Status: Completed
• Conditions: Breast Cancer
• Intervention / Treatment: Genetic: polymorphism analysis; Other: laboratory biomarker analysis; Other: high performance liquid chromatography; Procedure: radiomammography

Detailed Description

OBJECTIVES:

• To assess the changes in percent breast density (in response to 1 year of aromatase inhibitor therapy) from levels prior to the initiation of treatment.
• To assess the changes in dense area (in response to 1 year of aromatase inhibitor therapy) from levels prior to the initiation of treatment.
• To examine whether changes in percent breast density (in response to 1 year of aromatase inhibitor therapy) from pre-treatment levels correlate with changes in plasma hormone levels (estrone, estrone-sulfate, estradiol, and SHBG) and drug levels (anastrozole or exemestane) over the same time period.
• To examine whether changes in dense area (in response to 1 year of aromatase inhibitor therapy) from pre-treatment mammogram correlate with changes in plasma hormone levels (estrone, estrone-sulfate, estradiol, and SHBG) and drug levels (anastrozole or exemestane) over the same time period.
• To assess whether women with high pre-treatment percent density (upper tertile) experience greater decreases in percent breast density after 1 year of aromatase inhibitor therapy than women with low pre-treatment percent density (lower tertile).
• To assess whether women with high pre-treatment dense area (upper tertile) experience greater decreases in dense area after 1 year of aromatase inhibitor therapy than women with low pre-treatment dense area (lower tertile).
• To examine the associations of haplotype-tagged single nucleotide polymorphisms in genes in the aromatase pathway identified through the Mayo Clinic and Indiana University Pharmacogenomics Research Network Projects, with changes in percent and area density, plasma hormone levels, and drug levels after 1 year of aromatase inhibitor therapy.

OUTLINE: This is a multicenter study.

Patients undergo blood sample collection at baseline and at 1 year after initiation of aromatase inhibitor therapy (anastrozole or exemestane). Samples are analyzed for estrogen and testosterone levels and additional hormone levels and growth factors that have been previously linked with breast density and that could be altered by aromatase inhibitor use (i.e., sex hormone-binding globulin [SHBG], DHEA, DHEA sulfate, progesterone, prolactin, insulin-like growth factor-1 [IGF-1], and insulin-like growth factor binding protein 3 [IGF BP3]). Samples are also analyzed for anastrozole and exemestane levels by HPLC. Pharmacogenetic studies are also performed. Haplotype-tagged single nucleotide polymorphisms in genes in the aromatase pathway are examined.

Patients also undergo mammogram at baseline (≤ 6 months prior to study registration) and at 1 year after initiation of aromatase inhibitor therapy.

• Study Type: Observational
• Enrollment (Actual): 140

Contacts and Locations

Study Locations

• United States
  • Georgia
    • Augusta, Georgia, United States, 30912
      • MBCCOP - Medical College of Georgia Cancer Center
  • Illinois
    • Aurora, Illinois, United States, 60504
      • Rush-Copley Cancer Care Center
    • Bloomington, Illinois, United States, 61701
      • St. Joseph Medical Center
    • Canton, Illinois, United States, 61520
      • Graham Hospital
    • Carthage, Illinois, United States, 62321
      • Memorial Hospital
    • Effingham, Illinois, United States, 62401
      • St. Anthony's Memorial Hospital
    • Eureka, Illinois, United States, 61530
      • Eureka Community Hospital
    • Galesburg, Illinois, United States, 61401
      • Galesburg Cottage Hospital
    • Galesburg, Illinois, United States, 61401
      • Galesburg Clinic, PC
    • Havana, Illinois, United States, 62644
      • Mason District Hospital
    • Hopedale, Illinois, United States, 61747
      • Hopedale Medical Complex
    • Joliet, Illinois, United States, 60435
      • Joliet Oncology-Hematology Associates, Limited - West
    • Macomb, Illinois, United States, 61455
      • Mcdonough District Hospital
    • Moline, Illinois, United States, 61265
    • Moline, Illinois, United States, 61265
      • Trinity Cancer Center at Trinity Medical Center - 7th Street Campus
    • Normal, Illinois, United States, 61761
      • Bromenn Regional Medical Center
    • Normal, Illinois, United States, 61761
      • Community Cancer Center
    • Ottawa, Illinois, United States, 61350
      • Community Hospital of Ottawa
    • Ottawa, Illinois, United States, 61350
      • Oncology Hematology Associates of Central Illinois, PC - Ottawa
    • Pekin, Illinois, United States, 61554
      • Cancer Treatment Center at Pekin Hospital
    • Peoria, Illinois, United States, 61636
      • Methodist Medical Center of Illinois
    • Peoria, Illinois, United States, 61614
      • Proctor Hospital
    • Peoria, Illinois, United States, 61637
      • OSF St. Francis Medical Center
    • Peoria, Illinois, United States, 61615
      • CCOP - Illinois Oncology Research Association
    • Peoria, Illinois, United States, 61615
      • Oncology Hematology Associates of Central Illinois, PC - Peoria
    • Peru, Illinois, United States, 61354
      • Illinois Valley Community Hospital
    • Princeton, Illinois, United States, 61356
      • Perry Memorial Hospital
    • Spring Valley, Illinois, United States, 61362
      • St. Margaret's Hospital
    • Urbana, Illinois, United States, 61801
      • Carle Cancer Center at Carle Foundation Hospital
    • Urbana, Illinois, United States, 61801
      • CCOP - Carle Cancer Center
  • Indiana
    • Beech Grove, Indiana, United States, 46107
      • St. Francis Hospital and Health Centers - Beech Grove Campus
    • Michigan City, Indiana, United States, 46360
      • Saint Anthony Memorial Health Centers
    • Richmond, Indiana, United States, 47374
      • Reid Hospital & Health Care Services
  • Iowa
    • Ames, Iowa, United States, 50010
      • McFarland Clinic, PC
    • Bettendorf, Iowa, United States, 52722
    • Des Moines, Iowa, United States, 50309
      • CCOP - Iowa Oncology Research Association
    • Des Moines, Iowa, United States, 50309
      • John Stoddard Cancer Center at Iowa Methodist Medical Center
    • Des Moines, Iowa, United States, 50309
      • Medical Oncology and Hematology Associates at John Stoddard Cancer Center
    • Des Moines, Iowa, United States, 50314
      • Medical Oncology and Hematology Associates at Mercy Cancer Center
    • Des Moines, Iowa, United States, 50314
      • Mercy Cancer Center at Mercy Medical Center - Des Moines
    • Des Moines, Iowa, United States, 50316
      • John Stoddard Cancer Center at Iowa Lutheran Hospital
    • Des Moines, Iowa, United States, 50307
      • Mercy Capitol Hospital
    • Mason City, Iowa, United States, 50401
      • Mercy Cancer Center at Mercy Medical Center - North Iowa
    • Sioux City, Iowa, United States, 51101
      • Siouxland Hematology-Oncology Associates, LLP
    • Sioux City, Iowa, United States, 51104
      • St. Luke's Regional Medical Center
    • Sioux City, Iowa, United States, 51104
      • Mercy Medical Center - Sioux City
  • Kansas
    • Chanute, Kansas, United States, 66720
      • Cancer Center of Kansas, PA - Chanute
    • Dodge City, Kansas, United States, 67801
      • Cancer Center of Kansas, PA - Dodge City
    • El Dorado, Kansas, United States, 67042
      • Cancer Center of Kansas, PA - El Dorado
    • Kingman, Kansas, United States, 67068
      • Cancer Center of Kansas, PA - Kingman
    • Liberal, Kansas, United States, 67901
      • Southwest Medical Center
    • Newton, Kansas, United States, 67114
      • Cancer Center of Kansas, PA - Newton
    • Parsons, Kansas, United States, 67357
      • Cancer Center of Kansas, PA - Parsons
    • Pratt, Kansas, United States, 67124
      • Cancer Center of Kansas, PA - Pratt
    • Salina, Kansas, United States, 67042
      • Cancer Center of Kansas, PA - Salina
    • Wellington, Kansas, United States, 67152
      • Cancer Center of Kansas, PA - Wellington
    • Wichita, Kansas, United States, 67214
      • Wesley Medical Center
    • Wichita, Kansas, United States, 67208
      • Cancer Center of Kansas, PA - Medical Arts Tower
    • Wichita, Kansas, United States, 67214
      • Cancer Center of Kansas, PA - Wichita
    • Wichita, Kansas, United States, 67214
      • CCOP - Wichita
    • Wichita, Kansas, United States, 67214
      • Via Christi Cancer Center at Via Christi Regional Medical Center
    • Wichita, Kansas, United States, 67208
      • Associates in Womens Health, PA - North Review
    • Winfield, Kansas, United States, 67156
      • Cancer Center of Kansas, PA - Winfield
  • Michigan
    • Adrian, Michigan, United States, 49221
      • Hickman Cancer Center at Bixby Medical Center
    • Lambertville, Michigan, United States, 48144
      • Haematology-Oncology Associates of Ohio and Michigan, PC
    • Monroe, Michigan, United States, 48162
      • Community Cancer Center of Monroe
    • Monroe, Michigan, United States, 48162
      • Mercy Memorial Hospital - Monroe
  • Minnesota
    • Bemidji, Minnesota, United States, 56601
      • MeritCare Bemidji
    • Burnsville, Minnesota, United States, 55337
      • Fairview Ridges Hospital
    • Coon Rapids, Minnesota, United States, 55433
      • Mercy and Unity Cancer Center at Mercy Hospital
    • Duluth, Minnesota, United States, 55805
      • CCOP - Duluth
    • Duluth, Minnesota, United States, 55805-1983
      • Duluth Clinic Cancer Center - Duluth
    • Duluth, Minnesota, United States, 55805
      • Miller - Dwan Medical Center
    • Edina, Minnesota, United States, 55435
      • Fairview Southdale Hospital
    • Fridley, Minnesota, United States, 55432
      • Mercy and Unity Cancer Center at Unity Hospital
    • Hutchinson, Minnesota, United States, 55350
      • Hutchinson Area Health Care
    • Lichfield, Minnesota, United States, 55355
      • Meeker County Memorial Hospital
    • Mankato, Minnesota, United States, 56002
      • Immanuel St. Joseph's
    • Maplewood, Minnesota, United States, 55109
      • Minnesota Oncology Hematology, PA - Maplewood
    • Maplewood, Minnesota, United States, 55109
      • HealthEast Cancer Care at St. John's Hospital
    • Minneapolis, Minnesota, United States, 55407
      • Virginia Piper Cancer Institute at Abbott - Northwestern Hospital
    • Minneapolis, Minnesota, United States, 55415
      • Hennepin County Medical Center - Minneapolis
    • Robbinsdale, Minnesota, United States, 55422-2900
      • Hubert H. Humphrey Cancer Center at North Memorial Outpatient Center
    • Saint Louis Park, Minnesota, United States, 55416
      • CCOP - Metro-Minnesota
    • Saint Louis Park, Minnesota, United States, 55416
      • Park Nicollet Cancer Center
    • Saint Paul, Minnesota, United States, 55102
      • United Hospital
    • Saint Paul, Minnesota, United States, 55102
      • HealthEast Cancer Care at St. Joseph's Hospital
    • Shakopee, Minnesota, United States, 55379
      • St. Francis Cancer Center at St. Francis Medical Center
    • St. Paul, Minnesota, United States, 55101
      • Regions Hospital Cancer Care Center
    • Waconia, Minnesota, United States, 55387
      • Ridgeview Medical Center
    • Woodbury, Minnesota, United States, 55125
      • Minnesota Oncology Hematology, PA - Woodbury
    • Woodbury, Minnesota, United States, 55125
      • HealthEast Cancer Care at Woodwinds Health Campus
  • Missouri
    • Saint Louis, Missouri, United States, 63131
      • Missouri Baptist Cancer Center
    • Saint Louis, Missouri, United States, 63141
      • Arch Medical Services, Incorporated at Center for Cancer Care and Research
  • Montana
    • Billings, Montana, United States, 59101
      • CCOP - Montana Cancer Consortium
    • Billings, Montana, United States, 59101
      • Hematology-Oncology Centers of the Northern Rockies - Billings
    • Billings, Montana, United States, 59101
      • Northern Rockies Radiation Oncology Center
    • Billings, Montana, United States, 59101
      • St. Vincent Healthcare Cancer Care Services
    • Billings, Montana, United States, 59107-7000
      • Billings Clinic - Downtown
    • Bozeman, Montana, United States, 59715
      • Bozeman Deaconess Cancer Center
    • Butte, Montana, United States, 59701
      • St. James Healthcare Cancer Care
    • Great Falls, Montana, United States, 59405
      • Great Falls Clinic - Main Facility
    • Great Falls, Montana, United States, 59405
    • Helena, Montana, United States, 59601
      • St. Peter's Hospital
    • Kalispell, Montana, United States, 59901
      • Kalispell Regional Medical Center
    • Kalispell, Montana, United States, 59901
      • Glacier Oncology, PLLC
    • Kalispell, Montana, United States, 59901
      • Kalispell Medical Oncology at KRMC
    • Missoula, Montana, United States, 59801
      • Community Medical Center
    • Missoula, Montana, United States, 59804
      • Guardian Oncology and Center for Wellness
    • Missoula, Montana, United States, 59807-7877
      • Montana Cancer Specialists at Montana Cancer Center
    • Missoula, Montana, United States, 59807
      • Montana Cancer Center at St. Patrick Hospital and Health Sciences Center
  • North Carolina
    • Rutherfordton, North Carolina, United States, 28139
      • Rutherford Hospital
  • North Dakota
    • Bismarck, North Dakota, United States, 58501
      • Bismarck Cancer Center
    • Bismarck, North Dakota, United States, 58501
      • Medcenter One Hospital Cancer Care Center
    • Bismarck, North Dakota, United States, 58501
      • Mid Dakota Clinic, PC
    • Bismarck, North Dakota, United States, 58502
      • St. Alexius Medical Center Cancer Center
    • Fargo, North Dakota, United States, 58122
      • CCOP - MeritCare Hospital
    • Fargo, North Dakota, United States, 58122
      • MeritCare Broadway
  • Ohio
    • Bellefontaine, Ohio, United States, 43311
      • Mary Rutan Hospital
    • Bowling Green, Ohio, United States, 43402
      • Wood County Oncology Center
    • Chillicothe, Ohio, United States, 45601
      • Adena Regional Medical Center
    • Columbus, Ohio, United States, 43214-3998
      • Riverside Methodist Hospital Cancer Care
    • Columbus, Ohio, United States, 43222
      • Mount Carmel Health - West Hospital
    • Columbus, Ohio, United States, 43215
      • CCOP - Columbus
    • Columbus, Ohio, United States, 43215
      • Grant Medical Center Cancer Care
    • Columbus, Ohio, United States, 43228
      • Doctors Hospital at Ohio Health
    • Dayton, Ohio, United States, 45405
      • Grandview Hospital
    • Dayton, Ohio, United States, 45406
      • Good Samaritan Hospital
    • Dayton, Ohio, United States, 45415
      • Samaritan North Cancer Care Center
    • Dayton, Ohio, United States, 45429
      • CCOP - Dayton
    • Delaware, Ohio, United States, 43015
      • Grady Memorial Hospital
    • Elyria, Ohio, United States, 44035
      • Hematology Oncology Center
    • Findlay, Ohio, United States, 45840
      • Blanchard Valley Medical Associates
    • Franklin, Ohio, United States, 45005-1066
      • Middletown Regional Hospital
    • Kettering, Ohio, United States, 45429
      • Charles F. Kettering Memorial Hospital
    • Lancaster, Ohio, United States, 43130
      • Fairfield Medical Center
    • Lima, Ohio, United States, 45804
      • Lima Memorial Hospital
    • Marietta, Ohio, United States, 45750
      • Strecker Cancer Center at Marietta Memorial Hospital
    • Maumee, Ohio, United States, 43537
      • Northwest Ohio Oncology Center
    • Maumee, Ohio, United States, 43537
      • St. Luke's Hospital
    • Newark, Ohio, United States, 43055
      • Licking Memorial Cancer Care Program at Licking Memorial Hospital
    • Oregon, Ohio, United States, 43616
      • St. Charles Mercy Hospital
    • Oregon, Ohio, United States, 43616
      • Toledo Clinic - Oregon
    • Sandusky, Ohio, United States, 44870
      • Firelands Regional Medical Center
    • Sandusky, Ohio, United States, 44870
      • North Coast Cancer Care, Incorporated
    • Springfield, Ohio, United States, 45505
      • Community Hospital of Springfield and Clark County
    • Springfield, Ohio, United States, 45504
      • Mercy Medical Center
    • Sylvania, Ohio, United States, 43560
      • Flower Hospital Cancer Center
    • Tiffin, Ohio, United States, 44883
      • Mercy Hospital of Tiffin
    • Toledo, Ohio, United States, 43608
      • St. Vincent Mercy Medical Center
    • Toledo, Ohio, United States, 43606
      • Toledo Hospital
    • Toledo, Ohio, United States, 43614
      • Medical University of Ohio Cancer Center
    • Toledo, Ohio, United States, 43617
      • CCOP - Toledo Community Hospital
    • Toledo, Ohio, United States, 43623
      • Toledo Clinic, Incorporated - Main Clinic
    • Troy, Ohio, United States, 45373-1300
      • UVMC Cancer Care Center at Upper Valley Medical Center
    • Wauseon, Ohio, United States, 43567
      • Fulton County Health Center
    • Westerville, Ohio, United States, 43081
      • Mount Carmel St. Ann's Cancer Center
    • Wilmington, Ohio, United States, 45177
      • Clinton Memorial Hospital
    • Xenia, Ohio, United States, 45385
      • Ruth G. McMillan Cancer Center at Greene Memorial Hospital
    • Zanesville, Ohio, United States, 43701
      • Genesis - Good Samaritan Hospital
  • Oklahoma
    • Tulsa, Oklahoma, United States, 74136
      • Natalie Warren Bryant Cancer Center at St. Francis Hospital
  • Pennsylvania
    • Danville, Pennsylvania, United States, 17822-0001
      • Geisinger Cancer Institute at Geisinger Health
    • Hazleton, Pennsylvania, United States, 18201
      • Geisinger Hazleton Cancer Center
    • State College, Pennsylvania, United States, 16801
      • Geisinger Medical Group - Scenery Park
    • Wilkes-Barre, Pennsylvania, United States, 18711
      • Frank M. and Dorothea Henry Cancer Center at Geisinger Wyoming Valley Medical Center
    • Wilkes-Barre, Pennsylvania, United States, 18765
      • Mercy Hospital at Wilkes-Barre
  • South Carolina
    • Anderson, South Carolina, United States, 29621
      • AnMed Cancer Center
    • Spartanburg, South Carolina, United States, 29303
      • CCOP - Upstate Carolina
    • Spartanburg, South Carolina, United States, 29303
      • Gibbs Regional Cancer Center at Spartanburg Regional Medical Center
  • South Dakota
    • Rapid City, South Dakota, United States, 57701
      • Rapid City Regional Hospital
    • Sioux Falls, South Dakota, United States, 57105
      • Avera Cancer Institute
    • Sioux Falls, South Dakota, United States, 57105
      • Medical X-Ray Center, PC
    • Sioux Falls, South Dakota, United States, 57117-5039
      • Sanford Cancer Center at Sanford USD Medical Center
  • Virginia
    • Fredericksburg, Virginia, United States, 22401
      • Fredericksburg Oncology, Incorporated
  • Washington
    • Kirkland, Washington, United States, 98033
      • Cascade Cancer Center at Evergreen Hospital Medical Center
    • Port Angeles, Washington, United States, 98362
      • Olympic Medical Center
    • Renton, Washington, United States, 98055
      • Southlake Clinic
    • Seattle, Washington, United States, 98101
      • Virginia Mason Medical Center
    • Seattle, Washington, United States, 98101
      • CCOP - Virginia Mason Research Center
  • Wyoming
    • Sheridan, Wyoming, United States, 82801
      • Welch Cancer Center at Sheridan Memorial Hospital

Participation Criteria

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

Postmenopausal women with breast cancer.

Description

DISEASE CHARACTERISTICS:

Inclusion criteria:

• Must have histologically confirmed invasive breast cancer, as defined by the following TNM staging criteria:

  • pT1, pT2, or pT3

  • pNx, pN0, pN1, pN2, or pN3*

    • Patients with positive sentinel node biopsies (pN1) must have subsequent axillary dissection to be eligible
    • Patients with negative sentinel node biopsies (pN0) do not require axillary surgery for study eligibility

  • M0, according to the following radiologic studies:

    • Bone scan (required only if alkaline phosphatase is > 2 x institutional upper limit of normal [ULN] and/or there are symptoms of metastatic disease)

      • A confirmatory x-ray or other imaging study, such as CT scan or MRI, is required if the results from the bone scan are questionable
    • Abdominal ultrasound or CT scan of the abdomen (required only if AST/ALT or alkaline phosphatase is > 2 x ULN unless the elevation is in the bone fraction)
    • Chest x-ray NOTE: *Only when the sole basis for this classification is the presence of 10 or more involved axillary nodes

• Completely resected disease

  • Surgical margins must be clear of invasive carcinoma and ductal carcinoma in situ or lobular carcinoma in situ

• Must have one intact, noncancerous breast with no history of previous breast surgery in that breast (other than a breast biopsy)

  • Mammogram of the intact, noncancerous breast required ≤ 6 months prior to study registration (both a craniocaudal [top down] and mediolateral oblique view [side view] must be available)

• Must be registered on this study ≥ 3 weeks but ≤ 3 months after completion of chemotherapy OR primary surgery*

  • Adjuvant chemotherapy and radiation therapy as prescribed by the local institution is allowed provided patient is registered on this study and hormonal treatment is begun as soon as patient has sufficiently recovered from chemotherapy NOTE: *Primary surgery is defined as the last surgical procedure to remove invasive or in situ disease
• Planning to receive anastrozole or exemestane for ≥ 1 year for treatment of breast cancer

• Hormone receptor status:

  • Estrogen receptor- and/or progesterone receptor-positive (defined as a tumor receptor content of > 10 fmol/mg protein OR receptor-positive by immunohistochemistry [ERICA or PgRICA])

PATIENT CHARACTERISTICS:

Inclusion criteria:

• Female

• Postmenopausal, defined by one of the following:

  • Age > 60 years
  • Age 45-59 years with spontaneous cessation of menses > 12 months prior to chemotherapy (if no chemotherapy was given, then prior to study registration)
  • Age 45-59 years with cessation of menses for a duration of < 12 months or secondary to hysterectomy AND an FSH level in the postmenopausal range (or ≥ 34.4 IU/L, if institutional range is not available) prior to chemotherapy (if no chemotherapy was given, then prior to study registration)
  • Age 45-59 years with an FSH level in the postmenopausal range according to institutional laboratory standards (or > 34.4 IU/L, if the institutional range is not available) prior to chemotherapy (if no chemotherapy was given, then prior to study registration)
  • Bilateral oophorectomy
• ECOG performance status 0, 1, or 2
• Life expectancy ≥ 5 years

Exclusion criteria:

• History of other (non-breast) malignancies, except adequately treated nonmelanoma skin cancer, curatively treated in situ cancer of the cervix, or other curatively treated solid tumors with no evidence of disease for > 5 years
• Any co-existing medical or psychiatric condition that is likely to interfere with study procedures and/or results

PRIOR CONCURRENT THERAPY:

Inclusion criteria:

• See Disease Characteristics

Exclusion criteria:

• Hormone replacement therapy, oral contraceptives, tamoxifen, raloxifene, other selective estrogen-receptor modulators, or gonadotropin releasing-hormone analogues ≤ 6 months prior to the pre-registration mammogram
• Prior treatment with an aromatase inhibitor (e.g., anastrozole, exemestane, letrozole)
• Planned surgery (other than core needle biopsy) to intact non-cancerous breast (e.g., preventive/prophylactic mastectomy)

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

Group 1; Patients undergo blood sample collection at baseline and at 1 year after initiation of aromatase inhibitor therapy (anastrozole or exemestane). Samples are analyzed for estrogen and testosterone levels and additional hormone levels and growth factors that have been previously linked with breast density and that could be altered by aromatase inhibitor use (i.e., sex hormone-binding globulin [SHBG], DHEA, DHEA sulfate, progesterone, prolactin, insulin-like growth factor-1 [IGF-1], and insulin-like growth factor binding protein 3 [IGF BP3]). Samples are also analyzed for anastrozole and exemestane levels by HPLC. Pharmacogenetic studies are also performed. Haplotype-tagged single nucleotide polymorphisms in genes in the aromatase pathway are examined. Patients also undergo mammogram at baseline (≤ 6 months prior to study registration) and at 1 year after initiation of aromatase inhibitor therapy.

Genetic: polymorphism analysis; Other: laboratory biomarker analysis; Other: high performance liquid chromatography; Procedure: radiomammography

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Changes in percent breast density in response to 1 year of aromatase inhibitor therapy	Up to 12 months
Changes in dense area in response to 1 year of aromatase inhibitor therapy	Up to 12 months
Correlation of changes in percent breast density with changes in plasma hormone levels and drug levels	Up to 12 months
Correlation of changes in dense area with changes in plasma hormone levels and drug levels	Up to 12 months
Comparison of percent breast density in women with high pre-treatment percent density vs women with low pre-treatment percent density	Up to 12 months
Comparison of dense area in women with high pre-treatment dense area vs women with low pre-treatment dense area	Up to 12 months
Associations of haplotype-tagged single nucleotide polymorphisms in genes in the aromatase pathway with changes in percent and area density, plasma hormone levels, and drug levels after 1 year of aromatase inhibitor therapy	Up to 12 months

Collaborators and Investigators

• Sponsor: Alliance for Clinical Trials in Oncology
• Collaborators: National Cancer Institute (NCI)

Study record dates

Study Major Dates

• Study Start: September 1, 2007
• Primary Completion (Actual): December 1, 2009
• Study Completion (Actual): December 1, 2009

Study Registration Dates

• First Submitted: August 14, 2007
• First Submitted That Met QC Criteria: August 14, 2007
• First Posted (Estimate): August 15, 2007

Study Record Updates

• Last Update Posted (Estimate): July 13, 2016
• Last Update Submitted That Met QC Criteria: July 12, 2016
• Last Verified: July 1, 2016

More Information

Terms related to this study

• Keywords: stage IIIA breast cancer; stage II breast cancer; stage IIIC breast cancer; stage I breast cancer
• Additional Relevant MeSH Terms: Skin Diseases; Neoplasms; Neoplasms by Site; Breast Diseases; Breast Neoplasms
• Other Study ID Numbers: NCCTG-N063I; NCI-2012-02719 (Registry Identifier: CTRP (Clinical Trials Reporting System)); CDR0000560200 (Registry Identifier: PDQ (Physician Data Query))