A Study of RGLS8429 in Patients With Autosomal Dominant Polycystic Kidney Disease

Prior treatment

• Administration of tolvaptan in the 28 days before randomization
• History or presence of alcoholism or drug abuse within the past 2 years prior to screening
• Only one kidney or kidney transplant recipient
• Participation in another clinical trial and/or exposure to any investigational drug or approved therapy for investigational use within 28 days or 5 half-lives of the investigational drug's dosing, whichever is longer, prior to dosing. The 28-day or 5-half-life windows will be calculated from the date of the last dosing in the previous study to Day 1 of the current study.

Other illness

• Any medical condition or social circumstance that, in the opinion of the Investigator, may make the subject unlikely to complete the study or comply with study procedures and requirements; or may pose a risk to the subject's safety

Other

• Subject is mentally incapacitated or has significant emotional problems

• Male or female ADPKD patients, 18 to 70 years old
• Class 1C, 1D, or 1E Mayo Imaging Classification of ADPKD (based upon either the MRI obtained during screening, or a prior MRI obtained within 5 years of screening with documented Mayo classification)
• eGFR between 30 to 90 mL/min/1.73 m2
• Body mass index (BMI) 18 to 35 kg/m2
• Must understand and consent to the study procedures explained in the ICF and be willing and able to comply with the protocol