A Study To Investigate The Metabolism And Excretion Of 14C SB-751689 Given To Healthy Males And Postmenopausal Women

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00499928
Recruitment Status : Completed
First Posted : July 12, 2007
Last Update Posted : May 18, 2009
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Brief Summary:
This study will examine the biological fate of radioactive SB-751689 administered to healthy males and healthy postmenopausal women. Subjects will receive a single oral dose of radioactive SB-751689. Excreta and blood samples will be taken over the course of 7 days. This study will help determine the major route of elimination of SB-751689 in humans. It will also provide samples (blood, plasma, urine, and stools) for analysis of metabolites, if any.

Condition or disease Intervention/treatment Phase
Osteoporosis Drug: SB-751689 Phase 1

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 6 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: An Open-Label Study to Investigate the Excretion and Metabolic Disposition of a Single, Oral Dose of [14C]-SB-751689 (a Calcium-Sensing Receptor Antagonist) in Healthy Male Subjects and Healthy Postmenopausal Female Subjects
Study Start Date : April 2007
Actual Primary Completion Date : July 2007
Actual Study Completion Date : July 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Osteoporosis

Primary Outcome Measures :
  1. The total amount of administered radioactivity recovered in excreta and the primary route of excretion over 7 days [ Time Frame: over 7 days ]

Secondary Outcome Measures :
  1. The amount of radioactivity associated with blood vs. plasma. The total amount radioactivity vs. SB-751689 radioactivity (metabolite vs. parent) over 7 days [ Time Frame: over 7 days ]

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Ages Eligible for Study:   35 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy adult males of age 35 to 65 years, inclusive, or healthy ambulatory postmenopausal women defined as being amenorrheic for at least 2 years and 40 to 65 years of age, inclusive, at screening with FSH levels consistent with menopause. Healthy postmenopausal women, who are between ages 40 to 50 years, inclusive, must also have a documented history of bilateral oophorectomy (with or without hysterectomy) and be at least 6 weeks post-surgery.)
  • Non-smokers
  • Body weight > or = 50 kg and BMI within the range 19 - 32 kg/m2
  • A history of regular bowel movements
  • Capable of giving written informed consent

Exclusion Criteria:

  • Any clinically relevant biological or physical abnormality found or reported at screening which, in the opinion of the investigator, is clinically significant and would preclude safe participation in this study
  • QTc interval of > 450 msec at screening
  • Positive urine drug screen at screening
  • Positive urine test for alcohol at pre-dose
  • Positive for HIV at screening
  • Chronic hepatitis B and C, as evidenced by positive Hepatitis B surface antigen or Hepatitis C antibody
  • Urinary cotinine levels indicative of smoking at screening
  • History of smoking or use of nicotine containing products within one year of the study or >10 pack-year history of smoking overall
  • History of regular alcohol consumption exceeding 7 units/week for women and 14 units/week for men within 6 months of screening
  • History of drug abuse within 6 months of the study
  • Participation in a clinical study and received a drug or a new chemical entity with 30 days or 5 half-lives, or twice the duration of the biological effect of any drug prior to the first dose of the current study medication
  • Exposure to more than four new chemical entities within 12 months prior to the first dosing day
  • Subjects who have received a total body radiation dose of greater than 5.0 mSv or exposure to significant radiation in the 12 months prior to this study
  • Radiation exposure from the previous 3 year period is over 10 mSv for subjects who have been exposed to ionizing radiation above background as a result of their work with radiation as category A workers or as a result of research studies they may have been involved in. Clinical exposure will not be included
  • Condition that could interfere with the accurate assessment and recovery of radiocarbon [14C]
  • Use of prescription or nonprescription drugs including antacids, including vitamins, herbal and dietary supplements within 7 days prior to the first dose of study medication.
  • Consumption of red wine, grapefruit, grapefruit juice or grapefruit-containing products within 14 days prior to the first dose of study medication
  • Donation of blood in excess of 500 mL within 56 days prior to dosing.
  • Evidence of renal, hepatic or biliary impairment
  • History of serious gastrointestinal disease or history of a gastrointestinal surgical procedure that might affect the absorption of SB-751689
  • History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the physician responsible, contraindicates their participation
  • History of clinically significant cardiovascular disease
  • History of pernicious anemia, pancreatitis, osteosarcoma or kidney stones.
  • Conditions that might alter bone metabolism, including hyperparathyroidism, hypoparathyroidism, hyperthyroidism, hypothyroidism, Paget's disease, myeloma, malabsorption, or Cushing's syndrome, and hypogonadism (for male subjects), hypocalcemia, hypercalcemia, hypophosphatemia, hypomagnesemia, hypermagnesemia, osteopetrosis, osteomalacia, and recent history of fracture or prolonged bed rest
  • Liver function tests, PTH, or CPK outside the reference range at screening
  • Males unwilling to refrain from fathering a child during the study and for 14 days after

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00499928

United States, Wisconsin
GSK Investigational Site
Madison, Wisconsin, United States, 53704
Sponsors and Collaborators
Study Director: GSK Clinical Trials, M.D. GlaxoSmithKline

Responsible Party: Study Director, GSK Identifier: NCT00499928     History of Changes
Other Study ID Numbers: CR9106327
First Posted: July 12, 2007    Key Record Dates
Last Update Posted: May 18, 2009
Last Verified: May 2009

Keywords provided by GlaxoSmithKline:

Additional relevant MeSH terms:
Bone Diseases, Metabolic
Bone Diseases
Musculoskeletal Diseases
Metabolic Diseases