Effects of Acute Estrogen Therapy on Bone Formation

Bone Loss, Age-related Clinical Trial

Official title:

Effects of Acute Estrogen Therapy on Bone Formation

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02349113
• Other study ID #: 09-001935
• Status: Completed
• Phase: Phase 1
• First received: January 23, 2015
• Last updated: February 13, 2015
• Start date: February 2012
• Est. completion date: September 2012

Study information

• Verified date: February 2015
• Source: Mayo Clinic
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Interventional

Clinical Trial Summary

This study is being done to study age-related bone changes in women. The investigators know that the major cause of osteoporosis is a shortage of the female hormone estrogen. This study will look closer at how this shortage of estrogen works to cause a decrease in bone formation.

Description:

Estrogen (E) deficiency is the major cause of postmenopausal osteoporosis. Understanding the mechanisms by which E regulates bone metabolism is critical for developing novel approaches to prevent and treat this disorder. We will focus on defining mechanisms for the age-related decrease in bone formation and the role of E deficiency in mediating this decrease. We will use novel methods we have developed to examine gene expression in highly purified bone marrow osteoblastic cells. We will test whether the increase in bone formation previously observed following acute E treatment in women is associated with an increase in markers of Wnt/bone morphogenetic protein (BMP) signaling and/or production and in othe genes related to bone formation by osteoblastic cells.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 20
• Est. completion date: September 2012
• Est. primary completion date: September 2012
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 65 Years and older

Eligibility

Inclusion Criteria:

• At least 10 years postmenopausal; Menopause is defined as no menses for at least 1 year (or documented ovariectomy) and a serum follicle-stimulating hormone (FSH) above 30 IU/L.

Exclusion Criteria:

1. Clinically significant abnormality in any of the following screening laboratory studies (to be reviewed and determined by PI or CI) : serum 25-hydroxyvitamin D (see below); phosphorus (minor change outside of normal guidelines is acceptable and does not impact the study); alkaline phosphatase and aspartate transaminase (AST) (minor change outside of normal guidelines is acceptable but not to exceed 50% above normal or ineligible); Creatinine (Cr) (minor change outside of normal guidelines is acceptable but not to exceed a value of 1.2 or ineligible); serum calcium must not exceed upper limits of normal guidelines or subject ineligible; FSH needs to be =30; thyroid-stimulating hormone (TSH) needs to be above 0.3 and not > 10;

2. Presence of significant liver disease, renal disease, malignancy (including breast cancer and myeloma), malabsorption syndrome, hypoparathyroidism, hyperparathyroidism, acromegaly, Cushing's syndrome, hypopituitarism, severe chronic obstructive pulmonary disease, untreated gallbladder disease, history of myocardial infarction (MI) or stroke, or history of thrombophlebitis or deep venous thrombosis;

3. Undergoing treatment with any of the following drugs: adrenocorticoid steroids (3 months or longer at anytime or > 10 days of treatment within the previous 12 months), anticonvulsant therapy (within the previous year), sodium fluoride (any history of treatment with fluoride), pharmacological doses of thyroid hormone (causing decline of TSH below normal), calcium supplementation of more than 1200 mg/d (within the preceding 3 months), bisphosphonates in the past, calcitonin (within the past six months), E therapy or treatment with a selective estrogen receptor modulator (within the past 6 months), parathyroid hormone (PTH) use in the past. Subjects with a clinical history of an osteoporotic fracture (vertebral, hip, or distal forearm) within the previous 3 years will also be excluded.

Study Design

Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science

Related Conditions & MeSH terms

• Bone Loss, Age-related
• Osteoporosis

Intervention

Drug:
• Estrogens (Climara)
Treatment with estrogens: Estradiol dermal patch 0.1mg/d transdermally

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Mayo Clinic

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Gene expression (RNAseq analysis of gene expression from needle bone biopsies)	RNAseq analysis of gene expression from needle bone biopsies	3 weeks	No