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A Phase 2 Study to Evaluate the Safety and Efficacy of CTP-499 in Type 2 Diabetic Nephropathy Patients

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: NCT01487109
Recruitment Status : Completed
First Posted : December 7, 2011
Last Update Posted : August 16, 2021
Information provided by (Responsible Party):
Concert Pharmaceuticals

Brief Summary:
This study is being conducted to evaluate the safety and efficacy of treatment with CTP-499 for 24 weeks in patients with chronic kidney disease, Type 2 diabetic nephropathy and who are currently receiving treatment with an angiotensin converting enzyme inhibitor (ACEI) and/or angiotensin II receptor blocker (ARB).

Condition or disease Intervention/treatment Phase
Type 2 Diabetes Mellitus Chronic Kidney Disease Drug: CTP-499 Drug: Placebo Phase 2

Detailed Description:
There are two parts to this study, each part includes double-blind treatment with either CTP-499 or placebo. Part 1 will evaluate the safety and efficacy of treatment with CTP-499 twice daily for 24 weeks. Part 2 will evaluate the effects of longer term dosing for an additional 24 weeks. Following Part 2, patients will be allowed to participate in an Open Label extension with CTP-499 for a period of an additional 48 weeks.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 170 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: A Phase 2, Randomized, Double Blind, Placebo-Controlled Study to Evaluate the Safety and Efficacy of CTP-499 in Type 2 Diabetic Nephropathy Patients Currently Treated With ACEI and/or ARB Therapy
Study Start Date : January 2012
Actual Primary Completion Date : January 2015
Actual Study Completion Date : January 2015

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Placebo Comparator: Placebo
matching placebo tablets
Drug: Placebo
Matching placebo tablet

Active Comparator: CTP-499
600 mg tablet
Drug: CTP-499
600 mg tablet twice daily

Primary Outcome Measures :
  1. To assess the change in urinary albumin to creatinine ratio [ Time Frame: Weeks 16, 20, 24 ]

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or female 18 years or older
  • Patient diagnosed with Type 2 diabetes mellitus and chronic kidney disease
  • On a stable regimen of ACE inhibitors and/or ARB drugs for a minimum of 4 weeks
  • Not expected to start dialysis for one year
  • Patient has blood pressure less than or equal to 145/90 mm Hg
  • Patient has UACR greater than or equal to 200 mg/g if male and 300 mg/g if female but not more than 5000 mg/g
  • Patient has glycosylated hemoglobin A1c less than or equal to 10.5%

Exclusion Criteria:

  • Patient has concurrent condition such as uncontrolled inflammatory disease, acute infection or other unstable illnesses
  • Patient has a history of allergy or sensitivity to pentoxifylline or methylxanthines
  • Patient has acute, active and/or unstable renal impairment or has been hospitalized for acute renal failure within the previous year
  • Patient has active malignancy or history of neoplastic disease
  • Patient has a QTc interval greater than 450 milliseconds
  • Patient has ALT or AST greater than 3 times the upper limit of normal or a potassium greater than or equal to 5.5mEq/L at screening
  • Patient is breast feeding or pregnant

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): NCT01487109

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Sponsors and Collaborators
Concert Pharmaceuticals
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Study Director: LuAnn Sabounjian Concert Pharmaceuticals
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Responsible Party: Concert Pharmaceuticals Identifier: NCT01487109    
Other Study ID Numbers: CP505.2001
First Posted: December 7, 2011    Key Record Dates
Last Update Posted: August 16, 2021
Last Verified: July 2014
Keywords provided by Concert Pharmaceuticals:
Type 2 diabetes
chronic kidney disease
Additional relevant MeSH terms:
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Kidney Diseases
Renal Insufficiency, Chronic
Diabetic Nephropathies
Diabetes Mellitus, Type 2
Diabetes Mellitus
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Urologic Diseases
Renal Insufficiency
Diabetes Complications