Spots Global Cancer Trial Database for One Week Parathyroid Hormone-related Protein (PTHrP) IV Dose Escalation Study

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Trial Identification

Brief Title: One Week Parathyroid Hormone-related Protein (PTHrP) IV Dose Escalation Study

Official Title: Determining the Maximal Safe Dose of a Continuous Infusion of Parathyroid Hormone-related Protein(1-36): Effects on Bone Formation

Study ID: NCT00580788

Conditions

Osteoporosis

Humoral Hypercalcemia of Malignancy

Hyperparathyroidism

Interventions

PTHrP (1-36)

Study Description

Brief Summary: This is a dose escalation study to determine the maximum tolerable dose of Parathyroid Hormone-related Protein, PTHrP, that can be given safely over one week. The investigators plan to infuse low doses of intravenous PTHrP 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 on markers of bone turnover, and plasma 1,25 (OH)2 vitamin D regulation in healthy human volunteers.

Detailed Description: During this research the investigators administer PTHrP to healthy young volunteers in a controlled, continuous intravenous manner. As research subjects complete the week-long study without adverse effects, the dose of PThrP will be increased in later subjects. In the event of a significant adverse effect, immediate action will be taken to reverse it. The investigators want to estimate the effect of a sustainable level of mild hypercalcemia achieved by a week-long intravenous infusion of PTHrP has on vitamin D metabolism, markers of bone turnover and fractional excretion of calcium.