Osteoporosis Clinical Trial
Official title:
Comparison of Skeletal and Mineral Metabolism Responses in Healthy African-Americans and Caucasians Using a Continuous Seven-Day Parathyroid Hormone (PTH) or Parathyroid Hormone-related Protein (PTHrP) Infusion
Verified date | December 2014 |
Source | University of Pittsburgh |
Contact | n/a |
Is FDA regulated | No |
Health authority | United States: Food and Drug Administration |
Study type | Interventional |
This is a dose escalation study to determine the maximum tolerable dose of Parathyroid Hormone-related Protein, PTHrP, or Parathyroid Hormone, PTH, that can be given safely over one week in healthy African-American volunteers. The investigators plan to infuse low doses of intravenous PTHrP or PTH to determine if it leads to a sustained and progressive suppression of bone formation as occurs in humoral hypercalcemia of malignancy (HHM) or an increase in bone formation as occurs in hyperparathyroidism (HPT). Additionally, the investigators will assess the direct influence of PTHrP and PTH on vitamin D metabolism, markers of bone turnover, and fractional excretion of calcium. These results will be compared to previous studies of Caucasian volunteers.
Status | Withdrawn |
Enrollment | 0 |
Est. completion date | July 2017 |
Est. primary completion date | July 2017 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 24 Years to 35 Years |
Eligibility |
Inclusion Criteria: - Healthy African-American subjects of both sexes between the ages of 24-35 years, who are able to spend one week on the Clinical & Translational Research Center (CTRC) at the University of Pittsburgh Medical Center (UPMC) Montefiore. Exclusion Criteria: - Subjects with cardiac, vascular, renal (serum creatinine > 1.5), pulmonary, endocrine, musculoskeletal, hepatic, hematologic, malignant, or rheumatologic disease will be excluded. - Those found to have vitamin D deficiency, defined as a 25-OH vitamin D level < 10 ng/mL will also be excluded. - Additionally, those with BMI > 30, anemia (hematocrit < 36% in women, <40% in men), significant alcohol use, illicit drug use, hypertension (BP>160/90), or baseline hypotension (systolic blood pressure < 90mmHg) will be excluded. - Those taking chronic medications (except oral contraceptive pills (OCP's) or stable doses of thyroid replacement) or those who have received an investigational drug in the past 90 days will also be excluded. - Prior participants in PTH or PTHrP studies will not be eligible to participate. - Additionally pregnant women and lactating women will be excluded; all women will have a urine pregnancy test performed immediately before starting the study. |
Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject)
Country | Name | City | State |
---|---|---|---|
United States | University of Pittsburgh Medical Center | Pittsburgh | Pennsylvania |
Lead Sponsor | Collaborator |
---|---|
University of Pittsburgh |
United States,
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* Note: There are 52 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Safety: The absence of any dose limiting toxicity (DLT) criteria consisting of one major criteria or two minor criteria. | one week | Yes | |
Secondary | Blood collections analyzed for measurements of PTH(1-34), PTH(1-84), 25-OH vitamin D, 1,25(OH)2 vitamin D, markers of bone metabolism, and fractional excretion of calcium measurements. | one week | No |
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