Pharmacokinetics and Safety Pilot Study of Single-Dose Oral and Intravenous CTAP101 in Stage 3 and 4 Chronic Kidney Disease Subjects

This study has been completed.
Information provided by:
Cytochroma Inc. Identifier:
First received: April 23, 2009
Last updated: February 24, 2010
Last verified: February 2010

This study will investigate how the levels of a single dose of CTAP101 changes in the body over time (pharmacokinetics, PK) and how CTAP101 affects other mineral and hormonal balances (pharmacodynamics, PD) in patients with Stage 3 or 4 chronic kidney disease (CKD) with vitamin D insufficiency and secondary hyperparathyroidism (SHPT).

Condition Intervention Phase
Chronic Kidney Disease
Secondary Hyperparathyroidism
Chronic Renal Insufficiency
Chronic Renal Failure
Drug: CTAP101
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Pharmacokinetics/Dynamics Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Randomized, Open-Label, Single-Dose Pilot Study of Oral and i.v. CTAP101 Evaluating PK and Safety in Stage 3 and 4 CKD Subjects With Vitamin D Insufficiency and SHPT

Resource links provided by NLM:

Further study details as provided by Cytochroma Inc.:

Primary Outcome Measures:
  • To assess the PK and bioavailability of CTAP101 in Stage 3 and 4 CKD subjects with vitamin D insufficiency and SHPT [ Time Frame: from 3 to 0 hours prior to dosing until 42 days post dosing ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • To assess the safety and tolerability of CTAP101 capsules and injection [ Time Frame: From signing of ICF (Day -35) through study completion (Day 42 post dosing) ] [ Designated as safety issue: Yes ]
  • To assess the pharmacodynamics of single dose CTAP101 in Stage 3 and Stage 4 CKD subjects with vitamin D insufficiency and SHPT. [ Time Frame: From signing of ICF (Day -35) through study completion (Day 42 post dosing) ] [ Designated as safety issue: No ]

Enrollment: 92
Study Start Date: May 2009
Study Completion Date: December 2009
Primary Completion Date: November 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
low dose capsule
Drug: CTAP101
450 mcg, (90 mcg /capsule), single administration
Experimental: 2
high dose capsule
Drug: CTAP101
900 mcg, (90 mcg /capsule), single administration
Experimental: 3
iv injection
Drug: CTAP101
448 mcg /iv injection/ single administration


Ages Eligible for Study:   18 Years to 80 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Body mass index between great than or equal to 18 and less than or equal to 40 kg/m2
  • Plasma iPTH value for Stage 3 CKD greater than or equal to 70 pg/mL and lower than or equal to 1000 pg/mL
  • Plasma iPTH value for Stage 4 CKD greater than or equal to 110 pg/mL and lower than or equal to 1000 pg/mL
  • Adjusted serum total calcium value greater than 8.4 mg/dL and lower than 10.0 mg/dL
  • Serum phosphorus value greater than or equal to 2.5 mg/dL and lower than or equal to 5.5 mg/dL
  • Serum 25-hydroxyvitamin D level greater than 15 ng/mL and lower than 30 ng/mL
  • Hemoglobin level greater than or equal to 10 g/dL

Exclusion Criteria:

  • Has nephrotic range proteinuria
  • Has liver disease or significant hepatic dysfunction
  • Is taking Cytochrome P450 3A4 inhibitors or inducers
  • Has adult history of kidney stones and dysphagia
  • Has known history of alcohol/controlled substance abuse or are positive for drug of abuse screen
  • Currently on dialysis
  • Current serious illness such as cancer, HIV, cardiovascular event or hepatitis
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00888069

United States, Arizona
Pivotal Research Centers
Peoria, Arizona, United States, 85381
United States, Illinois
Research by Design
Evergreen Park, Illinois, United States, 60805
United States, Massachusetts
Western New England Renal & Transplant Associates
Springfield, Massachusetts, United States, 01107
United States, Minnesota
Twin Cities Clinical Research
Brooklyn Center, Minnesota, United States, 55430
United States, Ohio
Cincinnati, Ohio, United States, 45206
MetroHealth Medical Center
Cleveland, Ohio, United States, 44109-1998
United States, Pennsylvania
Northeast Clinical Research
Allentown, Pennsylvania, United States, 18103
United States, Tennessee
Southeast Renal Research Institute
Chattanooga, Tennessee, United States, 37404
Vanderbilt University Medical Center
Nashville, Tennessee, United States, 37232
United States, Texas
Southwest Houston Research Ltd
Houston, Texas, United States, 77099
United States, Wisconsin
Purity Dialysis Centers / Nephrology Associates
Delafield, Wisconsin, United States, 53018
Gunderson Clinic Ltd.
La Crosse, Wisconsin, United States, 54601
Sponsors and Collaborators
Cytochroma Inc.
Study Director: Joel Melnick, MD Cytochroma Inc.
  More Information

No publications provided

Responsible Party: Joel Melnick MD /Vice President, Clinical Research & Development, Cytochroma Inc Identifier: NCT00888069     History of Changes
Other Study ID Numbers: CTAP101-CL-2004
Study First Received: April 23, 2009
Last Updated: February 24, 2010
Health Authority: United States: Food and Drug Administration

Keywords provided by Cytochroma Inc.:
Parathyroid Diseases
Renal Insufficiency
Kidney Failure, Chronic
Hyperparathyroidism, Secondary
Vitamin D
Renal Insufficiency, Chronic
Kidney Diseases
Kidney Failure

Additional relevant MeSH terms:
Hyperparathyroidism, Secondary
Kidney Diseases
Kidney Failure, Chronic
Renal Insufficiency, Chronic
Renal Insufficiency
Parathyroid Diseases
Endocrine System Diseases
Urologic Diseases processed this record on August 27, 2014