Efficacy and Safety Study of KIACTA in Preventing Renal Function Decline in AA Amyloidosis

Inclusion Criteria: * females must be of nonchildbearing potential (more than 1 yr postmenopausal)or use effective contraception for at least 2 months prior to the baseline visit and through 30 days after the last dose of study medication * confirmed diagnosis of AA amyloidosis demonstrated by positive biopsy using congo red staining and immunohistochemistry or immunoelectronmicroscopy. Mass spectroscopy will be used upon approval of the sponsor on a case to case basis. * persistent proteinuria greater than 1 g/24h at 2 distinct 24-hr urine collections * must have CrCl greater than 25 ml/min/1.73 m2 at 2 distinct 24 hr urine collections Exclusion Criteria: * evidence or suspicion of chronic kidney disease secondary to a disease other than AA amyloidosis (eg, diabetes, long-standing uncontrolled hypertension, polycystic kidney disease, recurring polynephritis, or systemic lupus erythematosus) * history of kidney transplantation * evidence or suspicion of a cause of potentially reversible acute renal failure within 3 months prior to baseline visit * presence of concomitant diseases or medication that could interfere with the interpretation of study results or compromise patient safety * presence of condition that could reduce life expectancy to less than 2 yrs * Type 1 or 2 diabetes mellitus * significant hepatic enzyme elevation * unstable angina, myocardial infarction, coronary artery bypass graft surgery, or percutaneous transluminal coronary angioplasty within 6 months prior to the baseline visit; presence of NY Heart Assoc class III or IV heart failure * presence of, or history of stroke or transient ischemic attack within 6 months prior to baseline visit * initiation of, or any changes in, angiotensin converting enzyme inhibitor, angiotensin II receptor antagonist therapy, or renin inhibitor within 3 months prior to baseline visit * initiation of, or any changes in, cytotoxic agents, anti-tumor necrosis factor agents, anti interleukin-1 or 6 agents, or colchicine therapy within 3 months prior to baseline visit * previous use of Kiacta * history of malignancy within 5 yrs prior to study entry, except for cervical carcinoma in situ, nonmelanomatous carcinoma of the skin, or ductal carcinoma in situ of the breast that has been surgically cured * use of investigational drug within 30 days prior to the first screening visit * active alcohol and/or drug abuse