RATIONALE: Studying samples of blood and breast tissue from healthy women in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to breast cancer risk. PURPOSE: This research study is looking at breast tissue in women not previously diagnosed with breast cancer who are undergoing fine-needle aspiration.
OBJECTIVES: Primary * To determine if breast tissue DNA methylation profile and hormone concentration change across follicular and luteal phase, or across menopause, in random fine needle aspiration samples of women with no prior diagnosis or treatment for breast cancer. * To determine if DNA methylation profile and breast hormone levels correlate with mammographic density, cytomorphology, or Gail risk estimates. * To develop a high throughput commercial assay for DNA methylation profiling for assessing breast cancer risk. * To develop a highly sensitive, specific, and novel nanoassay for estradiol and progesterone. OUTLINE: This is a multicenter study. Premenopausal women are stratified by menstrual cycle phase (mid-follicular \[day 5-10\] vs mid-luteal \[day 20-25\]), based on an adjusted 28-day cycle. Patients undergo breast density measurement by digital mammography. Blood samples are obtained and analyzed for estradiol, progesterone, and follicle-stimulating hormone measurements, to define menstrual/menopausal status, and for DNA extraction. Patients also undergo random fine needle aspiration. Biopsy material from aspiration is analyzed for cytomorphology, steroid radioimmunoassay (RIA), steroid nanoassay, and DNA methylation studies (via polymerase chain reaction). The aspiration samples are also analyzed for estradiol and progesterone levels using high-pressure liquid chromatography and RIA.
Study Type
OBSERVATIONAL
Enrollment
385
Deep infiltration into the tissue of each breast with up to a 21 gauge needle attached to a syringe with about 4-5 passes at each location (up to 8-10 passes per breast) under local anesthesia (lidocaine).
Standard mammography of both breasts to obtain images for breast density measurement.
Robert H. Lurie Comprehensive Cancer Center at Northwestern University
Chicago, Illinois, United States
Differences in DNA methylation profiles between women in different menstrual stages
Time frame: One time rFNA procedure to collect samples.
Differences in DNA methylation profiles between women in different menstrual stages
Time frame: One time rFNA procedure to collect samples
Correlation between DNA methylation profiles and mammographic density, cytomorphology, or Gail risk estimate
Time frame: One time rFNA procedure to collect sample to compare with baseline mammogram and risk info.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.