Bone Mass Accrual in Adolescent Athletes
The adolescent and young adult years are a critical window in time for bone mineral accrual. More than 90% of peak bone mass is achieved by 18 years, and data indicate that insults sustained during adolescence and young adulthood may result in permanent deficits in bone accrual. Adult athletes with amenorrhea (AA) have low bone mineral density (BMD) secondary to hypogonadism, associated with increased fracture risk and associated co-morbidities. We will examine whether estrogen replacement will increase BMD and improve measures of bone microarchitecture in adolescents and young women with AA, thus optimizing peak bone mass.
Young female athletes 18-21 years old will be randomized to estrogen (and progesterone) with lifestyle modification versus lifestyle modification alone for a 12 month period. Bone density and structure will be assessed over this period. Hormonal evaluations will also be performed.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
Massachusetts General Hospital
Massachusetts General Hospital
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00827151
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Estrogen Receptor Alpha
One of the ESTROGEN RECEPTORS that has marked affinity for ESTRADIOL. Its expression and function differs from, and in some ways opposes, ESTROGEN RECEPTOR BETA.
A second generation selective estrogen receptor modulator (SERM) used to prevent osteoporosis in postmenopausal women. It has estrogen agonist effects on bone and cholesterol metabolism but behaves as a complete estrogen antagonist on mammary gland and uterine tissue.
Estrogen Replacement Therapy
The use of hormonal agents with estrogen-like activity in postmenopausal or other estrogen-deficient women to alleviate effects of hormone deficiency, such as vasomotor symptoms, DYSPAREUNIA, and progressive development of OSTEOPOROSIS. This may also include the use of progestational agents in combination therapy.
Estrogen Receptor Beta
One of the ESTROGEN RECEPTORS that has greater affinity for ISOFLAVONES than ESTROGEN RECEPTOR ALPHA does. There is great sequence homology with ER alpha in the DNA-binding domain but not in the ligand binding and hinge domains.
One of the SELECTIVE ESTROGEN RECEPTOR MODULATORS with tissue-specific activities. Tamoxifen acts as an anti-estrogen (inhibiting agent) in the mammary tissue, but as an estrogen (stimulating agent) in cholesterol metabolism, bone density, and cell proliferation in the ENDOMETRIUM.
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