Partial Double-Blind, Placebo-Controlled Study to Assess the Effect of Anastrozole on the Endometrium in Healthy Volunteers
- Registration Number
- NCT00467493
- Lead Sponsor
- Meditrina Pharmaceuticals
- Brief Summary
Aromatase inhibitors have been approved for use in postmenopausal women to treat and prevent breast cancer. They act by blocking the action of the enzyme, aromatase, that is necessary for the production of estradiol. This class of drugs, aromatase inhibitors, are very effective in reducing estradiol levels in postmenopausal women and in treating estrogen receptor positive breast cancers. This study is examining the effect of a specific inhibitor, anastrozole, on endometrial thickness in premenopausal women. The endometrium is sensitive to estradiol and also has local aromatase which, if inhibited, may result in reduced endometrial thickness. The main hypothesis is that anastrozole can be administered at any time during the menstrual cycle and reduce endometrial thickness compared to placebo.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Female
- Target Recruitment
- 64
- Between the ages of 25 and 45 and pre-menopausal;
- Non-lactating and not pregnant
- able to follow the schedule of procedures
- able to freely provide informed consent
- have clinically acceptable physical examination and safety laboratory studies
- current use of any form of systemic contraceptive
- have self-reported irregular menstrual cycles
- intercurrent illness(es) detected on the screening physical
- unwilling or unable to use barrier methods of contraception
- have evidence of endometrial polyps or myomata on TVU/SIS that would interfere with endometrial thickness measurement
- detection of ovarian cyst(s) during adnexal examination on screening TVU/SIS measuring greater than 5 cm
- have history of, or current cancer, on any form exclusive of basal cell carcinoma
- BMI >= 35
- history of alcohol or drug abuse in the past 5 years
- unwilling or unable to undergo study procedures within the necessary time frames
- history or current liver abnormalities as defined by ALT or AST > 2X ULN
- treated or untreated diabetes defined as fasting blood sugar >= 126 mg/dL
- untreated hypertension
- impaired renal function by estimated creatinine clearance < 80mL/min
- have estradiol levels < 20 pg/ml and FSH levels > 40 mIU/mL or
- have a history of adverse reaction any aromatase inhibitor
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Anastrozole -B Anastrozole Treatment for 7 consecutive days early in menstrual cycle Anastrozoe - C Anastrozole Treatment for 7 consecutive days mid follicular phase Anastrozole - D Anastrozole Treatment for 7 consecutive days - mid cycle Anastrozole - E Anastrozole Treatment for 7 consecutive days - luteal Anastrozole - A Anastrozole Treatment for 26 consecutive days Anastrozole - F Anastrozole Treatment with placebo for 26 consecutive days
- Primary Outcome Measures
Name Time Method Endometrial thickness as measured by transvaginal ultrasound, safety Over one menstrual cycle
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (2)
Jasper Research Clinic
🇺🇸Kalamazoo, Michigan, United States
University Women's Care
🇺🇸Southfield, Michigan, United States