Study of FibroGen (FG)-3019 in Subjects With Type 2 Diabetes Mellitus and Kidney Disease on ACEi and/or ARB Therapy

The primary objective of this study is to assess the effect of FG-3019 on proteinuria as
assessed by urinary albumin/creatinine ratio (ACR).

Key Inclusion Criteria:

1. Signed written informed consent

2. Males and females 18-75 years of age, inclusive

3. Diagnosis of type 2 diabetes mellitus according to American Diabetes Association (ADA)
criteria

4. 24-hour urinary ACR 200-3000 mg/g, inclusive, on two occasions during screening at
least 2 days apart

5. Estimated glomerular filtration rate (eGFR) (by MDRD equation) >20 mL/min/1.73 m2

6. Mean systolic blood pressure less than or equal to 150 mmHg and a mean diastolic blood
pressure less than or equal to 95 mmHg

7. Receiving ACEi and/or ARB therapy at an unchanged dose at or above the minimum trial
dosage for at least 3 months prior to the first Screening visit and willing to
maintain these doses throughout the treatment period

Key Exclusion Criteria:

1. Females who are pregnant or breast feeding

2. Organ transplant recipient, history of dialysis, or known non-diabetic renal disease
other than benign cysts or anatomical variants

3. History of New York Heart Association class III/IV heart failure

4. Screening electrocardiogram showing acute and/or clinically significant findings
including but not limited to ST depression

5. History of any of the following events within 3 months prior to Screening: coronary
artery bypass graft, cerebrovascular accident, myocardial infarction, transient
ischemic attack, unstable angina, uncontrolled cardiac arrhythmia, atrial
fibrillation, percutaneous coronary intervention, or vascular stent placement

6. History of anaphylactic or systemic allergic reaction to human, humanized, chimeric,
or murine monoclonal antibodies

7. Aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) >2.5 times the
upper limit of normal; direct bilirubin above the upper limit of normal, or >2.5 times
the upper limit of normal in cases of documented Gilbert's syndrome

8. Hemoglobin <10 g/dL

9. Hemoglobin A1c (HbA1c) >9 %

10. Low density lipoprotein (LDL) >130 mg/dL