A Double-Blind, Randomized, Placebo-Controlled Safety Study Evaluating the Effects of Residual Renal Function (RFF) in Patients With End-Stage Renal Disease and Type 2 Diabetes Mellitus on Peritoneal Dialysis

Inclusion Criteria:

1. Patients must have ESRD and been on PD for longer than 3 months

2. Patients must have had a diagnosis of T2DM prior to starting dialysis

3. Patients must have RRF, as defined by the mean of urea and creatinine clearance on a
24 hour urine collection, ≥ 25 Liters/week/1.73 m2 documented in the four months
prior to the Screen A visit

4. Patients must have RRF, as defined by the mean of urea and creatinine clearances on a
24 hour urine collection, ≥ 25 Liters/week/1.73 m2 at both the Screen A and Screen B
visits

5. The RRF value obtained at the Screen B visit, must not be less than 50% of the RRF
value obtained at the Screen A visit

6. Patients must be at least 18 years of age

7. Patients must have a mean systolic blood pressure (SBP) on three readings at both
Screen A and Screen B visits ≤ 160 mmHg and ≥ 90 mmHg

8. Patients must have a mean diastolic blood pressure (DBP) on three readings at both
Screen A and Screen B visits < 100 mmHg and ≥ 40 mmHg

9. Patients must be willing to practice methods of birth control (both males who have
partners of childbearing potential and females of childbearing potential) during
screening, while taking study drug and for at least 30 days after the last dose of
study drug is ingested

10. Patients must be willing and able to cooperate with all aspects of the protocol

11. Patients must be willing and able to give written informed consent to participate in
the study. They must provide consent for access to medical data according to
appropriate local data protection legislation and allow authorization to access
medical records that describe events captured in the endpoints

Exclusion Criteria:

1. History of Autosomal Dominant Polycystic Kidney Disease

2. Currently Active Systemic Lupus Erythematosus

3. History of Hepatitis B Surface Antigen +

4. History of Hepatitis C Antibody + being treated with antiviral therapy

5. History of an organ transplant

6. A planned renal transplant from a living donor during the study

7. History of hospitalization for congestive heart failure or pulmonary edema within 12
weeks before study randomization

8. History of cirrhosis of the liver

9. History of amyloidosis or light chain nephropathy

10. History of hemoglobin A1c level > 11.0% (97 mmol/mol) within 12 weeks before study
randomization

11. History of recently active cardiovascular disease defined as:

1. Unstable angina pectoris within 12 weeks before study randomization

2. Myocardial infarction, coronary artery bypass graft surgery, or percutaneous
transluminal coronary angioplasty/stent within 12 weeks before study
randomization

3. Cerebrovascular accident, including transient ischemic attack within 12 weeks
before study randomization

12. History of a diagnostic or interventional procedure that required intravenous
administration of an iodinated contrast agent or gadolinium within 12 weeks before
study randomization

13. History of known severe obstructive valvular heart disease or severe obstructive
hypertrophic cardiomyopathy

14. History of known 2o or 3o atrioventricular block not successfully treated with a
pacemaker

15. History or resuscitated sudden cardiac death

16. History of an automatic implantable defibrillator

17. QTc greater than 0.50 seconds on an ECG obtained during either Screen A or Screen B
visits

18. A serum magnesium level less than 1.4 meq/L on either Screen A or Screen B visit
laboratory test results

19. History of systemic immunosuppression for more than 15 days, cumulatively, within the
12 weeks prior to study randomization or anticipated need for more than 15 days of
immunosuppression during the study

20. Total bilirubin, aspartate transaminase (AST), or alanine transaminase (ALT) level
greater than the upper limit of normal (ULN) or alkaline phosphatase level greater
than two times the ULN on either the Screen A and Screen B visit laboratory test
results

21. Known hypersensitivity to any component of the study drug

22. Current history of drug or alcohol abuse, as assessed by the investigator

23. History of clinically significant infection requiring intravenous administration of
antibiotics or hospitalization within 12 weeks before study randomization

24. In patients who have been on peritoneal dialysis for ≥ 6 months, two or more episodes
of peritonitis in the 6 months before study randomization. In patients who have been
on peritoneal dialysis for <6 months, one episode of peritonitis before study
randomization

25. History of a diagnosis or treatment of a malignancy in the past 5 years, excluding
non-melanoma skin cancer and carcinoma in situ of the cervix

26. History of a clinical condition that, in the judgment of the investigator, could
potentially pose a health risk to the patient while involved in the study

27. Patient is unable to communicate or cooperate with the investigator due to language
problems, poor mental development, or impaired cerebral function

28. Participation in a clinical study involving any intervention within 30 days prior to
Screen A visit, concurrent participation in such a study, or participation in a prior
clinical study involving bardoxolone methyl in any form

29. Female patients who are pregnant, intend to become pregnant during this study, or are
nursing