Phase II Pharmacodynamic Trial to Determine the Effects of Bardoxolone Methyl on eGFR in Patients With Type 2 Diabetes and Chronic Kidney Disease

NCT ID: NCT01053936

Last Updated: 2025-05-29

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

129 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-01-31

Study Completion Date

2011-02-28

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

This study assesses the effects of a new formulation of bardoxolone methyl on eGFR in Patients with Chronic Kidney Disease and Type 2 Diabetes.

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Bardoxolone methyl (RTA 402) is an Antioxidant Inflammation Modulator (AIM) that is undergoing clinical testing in chronic kidney disease (CKD). Bardoxolone methyl and other AIMs inhibit immune-mediated inflammation by restoring redox homeostasis in inflamed tissues through the induction of the cytoprotective transcription factor Nrf2. In the diabetic population, adipocytes produce cytokines and mobilize free fatty acids which induce insulin resistance. Resultant hyperglycemia and increased cytokine production induces reactive oxygen and nitrogen species which in turn induce vascular inflammation and endothelial dysfunction. These stimuli cause further activation of NF-kB, promoting inflammation, mesangial cell contraction, mesangial expansion and endothelial dysfunction, the end result of which is decreased renal function. By inducing Nrf2 and suppressing redox-driven inflammation, we hypothesize that inflammation and resultant adverse renal functional changes in patients with chronic kidney disease resulting from diabetes can be suppressed.

In a Phase IIa open label study of patients with CKD and type 2 diabetes, treatment with bardoxolone methyl for 28 days resulted in significant improvements in renal function, including increases in eGFR, and decreases in serum creatinine, cystatin C, BUN, phosphorus, uric acid, creatinine clearance, and angiotensin II; improvements in glycemic control as assessed by hemoglobin A1c; and improvements in markers of endothelial dysfunction and systemic inflammation, such as circulating endothelial cells and adiponectin. These data are consistent with the hypothesis that bardoxolone methyl improves renal function through suppression of renovascular oxidative stress and inflammation.

A new formulation of bardoxolone methyl has been developed, which is the same chemical entity but manufactured to contain an amorphous dispersion rather than a crystalline solid state. The new amorphous dispersion formulation of bardoxolone methyl has been shown to be more orally bioavailable in non-human primates. The purpose of this study is to determine the appropriate dose of the new bardoxolone methyl formulation to use in future clinical studies by determining the dose response relationship on eGFR.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Renal Insufficiency, Chronic Diabetes Mellitus, Type 2

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Bardoxolone methyl: 5 mg

Group Type EXPERIMENTAL

Bardoxolone methyl (amorphous dispersion)

Intervention Type DRUG

Oral, once daily

Bardoxolone methyl: 10 mg

Group Type EXPERIMENTAL

Bardoxolone methyl (amorphous dispersion)

Intervention Type DRUG

Oral, once daily

Bardoxolone methyl: 15 mg

Group Type EXPERIMENTAL

Bardoxolone methyl (amorphous dispersion)

Intervention Type DRUG

Oral, once daily

Bardoxolone methyl: 30 mg

Group Type EXPERIMENTAL

Bardoxolone methyl (amorphous dispersion)

Intervention Type DRUG

Oral, once daily

Bardoxolone methyl: 2.5 mg

Group Type EXPERIMENTAL

Bardoxolone methyl (amorphous dispersion)

Intervention Type DRUG

Oral, once daily

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Bardoxolone methyl (amorphous dispersion)

Oral, once daily

Intervention Type DRUG

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

1. Patients must have a history of type 2 diabetes; diagnosis of type 2 diabetes should have been made at \>30 years of age (if diabetes developed at a younger age, C-peptide level may be obtained to confirm diagnosis);
2. Patients must be at least 18 years of age;
3. The average of 2 eGFR values collected during screening must be within 15 - 45 mL /min/1.73m2 inclusive.
4. Patients must be receiving an angiotensin converting enzyme (ACE) inhibitor and/or an angiotensin II receptor blocker (ARB) for at least 8 weeks prior to screening, where the dose of the ACE inhibitor or the ARB is considered appropriate for that patient, and the patient has been stable and maintained on that dose for at least 8 weeks prior to randomization (Day 1). No change in ACE or ARB therapy should be anticipated or planned for the period of the study.
5. Male and female patients must agree to use effective contraception during the entire study period and for at least 2 months after the last dose of study drug, unless documentation of infertility exists
6. Women of child-bearing potential must have a negative serum pregnancy test result at screening and a confirmed negative urine pregnancy test result prior to administration of the first dose of study medication;
7. Patient is willing and able to cooperate with all aspects of the protocol;
8. Patient is willing and able to give written informed consent for study participation

Exclusion Criteria

1. Any patient with Type 1 (insulin-dependent; juvenile onset) diabetes; or any history of diabetic ketoacidosis;
2. Any patient with known non-diabetic renal disease, family history of a hereditary form of kidney disease, or patients with a history of a renal transplant.
3. Any patient with clinical or renal biopsy evidence of any non-diabetic renal disease other than nephro-sclerosis;
4. Any patient with blood pressure (BP) that is unable to be controlled to a systolic pressure (SeSBP) \<160 mmHg and a diastolic pressure (SeDBP) of \<90 mmHg. BP will be determined by the average of 3 readings, taken after being seated for at least 5-minutes. BP must be within this range taken at 2 separate time-points at least 4 days apart during the screening period;
5. Any patient with Hemoglobin A1c level \>10% collected at screening;
6. Any patient with cardiovascular disease as follows:

1. Unstable angina pectoris within 3 months before study randomization;
2. Myocardial infarction, coronary artery bypass graft surgery, or percutaneous transluminal coronary angioplasty/stent within 3 months before study randomization;
3. Transient ischemic attack within 3 months before study randomization;
4. Cerebrovascular accident within 3 months before study randomization;
5. Obstructive valvular heart disease or hypertrophic cardiomyopathy;
6. 2nd degree or 3rd degree atrioventricular block not successfully treated with a pacemaker;
7. Current diagnosis of Class III or IV congestive heart failure ;
7. Any patient with QTc Fredericia interval \> 450 milliseconds as determined by the average of values reported by a central reader from 3 ECGs taken at the Screening Visit.
8. Any patient with need for chronic (\>2 weeks) immunosuppressive therapy, including corticosteroids (excluding intra-articular injections inhaled or nasal steroids) within 3 months prior to randomization;
9. Any patient who requires more than occasional (once or twice weekly) use of non-steroidal anti-inflammatory agents (NSAIDS);
10. Any patient who requires a change or dose adjustment in any of the following medications: ACE inhibitors and ARBs within 8 weeks; other anti-hypertensive, and other anti-diabetic medications within 6 weeks prior to study randomization;
11. Any patient who is unable or unwilling to discontinue the following medications throughout the study period: Niacin® (nicotinic acid), Niaspan® (nicotinic acid), Niacor® (nicotinic acid), Nicolar® (nicotinic acid),Nicobid® (nicotinic acid), Nydrazid® (isoniazid), Dantrium® (dantrolene), Normodyne® (labetalol), Trandate® (labetalol), Cylert® (pemoline), Tradon® (pemoline), PemADD® (pemoline), Felbatol® (felbamate), Zyflo® (zileuton),Tasmar® (tolcapone), or Tricor® (fenofibrate), Antaram® (fenofibrate), Triglide® (fenofibrate), Lofibra® (fenofibrate), Lipidil Micro® (fenofibrate), Lipidil Supra® (fenofibrate); including fenofibrate derivatives e.g. Lopid® (gemfibrozil) and Atromid-S® (clofibrate) . Patient must discontinue the aforementioned medications for a minimum of two weeks prior to randomization. Patients may continue use of multi-vitamins (e.g., Centrum) ®, which have a maximum total daily consumption of \<= 50 mg of nicotinic acid (Niacin®);
12. Any patient with evidence of hepatic or biliary dysfunction including levels of total bilirubin \>1.0 mg/dL (\>17 micromole/L), aspartate aminotransferase (AST) or alanine aminotransferase (ALT) \> upper limit of normal (ULN), or alkaline phosphatase \>2.0 times the ULN on ANY screening laboratory test result;
13. If a patient provides a history of hepatitis B or C but has normal liver enzyme levels, the investigator should perform a serologic hepatitis screen and call the Medical Monitor to discuss patient eligibility. Patients with a history of hepatitis A that is resolved and who do not demonstrate any liver enzyme level elevation are eligible for protocol randomization;
14. Any female patient who is pregnant, nursing or planning a pregnancy;
15. Any patient with known hypersensitivity to any component of the study drug;
16. Any patient who has undergone diagnostic or intervention procedure requiring a contrast agent within the last 30 days prior to study randomization;
17. Patient with a current history of drug or alcohol abuse as per the Investigator's assessment;
18. Any patient with a history of neoplastic disease (except basal or squamous cell carcinoma of the skin) within 5 years prior to study randomization;
19. Any patient who has had dialysis within 3 months before randomization and/or have not maintained a stable level of kidney function within 3 months of randomization per Investigator assessment;
20. Any patient who has any concurrent clinical conditions that in the judgment of the investigator could either potentially pose a health risk to the patient while involved in the study or could potentially influence the study outcome;
21. Any patient who has participated in another clinical study involving investigational or marketed products within 30 days prior to randomization or would concomitantly participate in such a study, or any patient who has received bardoxolone methyl in any form;
22. Any patient who is unable to communicate or cooperate with the Investigator due to language problems, poor mental development, or impaired cerebral function.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

Meet the organizations funding or collaborating on the study and learn about their roles.

Biogen

INDUSTRY

Sponsor Role lead

Responsible Party

Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.

Responsibility Role SPONSOR

Locations

Explore where the study is taking place and check the recruitment status at each participating site.

Montgomery, Alabama, United States

Site Status

Phoenix, Arizona, United States

Site Status

Tempe, Arizona, United States

Site Status

La Mesa, California, United States

Site Status

Riverside, California, United States

Site Status

San Dimas, California, United States

Site Status

Washington D.C., District of Columbia, United States

Site Status

Brandon, Florida, United States

Site Status

Port Charlotte, Florida, United States

Site Status

West Palm Beach, Florida, United States

Site Status

Augusta, Georgia, United States

Site Status

Canton, Georgia, United States

Site Status

Chicago, Illinois, United States

Site Status

Peoria, Illinois, United States

Site Status

Brooklyn Center, Minnesota, United States

Site Status

Morehead City, North Carolina, United States

Site Status

Winston-Salem, North Carolina, United States

Site Status

Pittsburgh, Pennsylvania, United States

Site Status

Providence, Rhode Island, United States

Site Status

Chattanooga, Tennessee, United States

Site Status

Corpus Christi, Texas, United States

Site Status

Dallas, Texas, United States

Site Status

Greenville, Texas, United States

Site Status

Houston, Texas, United States

Site Status

San Antonio, Texas, United States

Site Status

Federal Way, Washington, United States

Site Status

Countries

Review the countries where the study has at least one active or historical site.

United States

Other Identifiers

Review additional registry numbers or institutional identifiers associated with this trial.

RTA 402-C-0902

Identifier Type: -

Identifier Source: org_study_id

More Related Trials

Additional clinical trials that may be relevant based on similarity analysis.

A Phase 2b Diabetic Kidney Disease Study
NCT04170543 COMPLETED PHASE2