Title: A Phase 2a, Open-label, Single-arm Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of VX-407 in Subjects with Autosomal Dominant Polycystic Kidney Disease Who Have a Subset of PKD1 Gene Variants

Brief Title: Efficacy and Safety of VX-407 in Subjects with ADPKD

Brief Summary: The purpose of the study is to evaluate the effect of VX-407 on height-adjusted total kidney volume (htTKV), safety, tolerability, and pharmacokinetics (PK) of VX-407.

Title: A Phase 2, Multicenter, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety and Efficacy of ABBV-CLS-628 in Adult Subjects with Autosomal Dominant Polycystic Kidney Disease (ADPKD)

Brief Title: Study of ABBV-CLS-628 in Adults with ADPKD

Brief Summary: Autosomal Dominant Polycystic Kidney Disease (ADPKD) is the most common genetic cause of kidney disease that causes fluid-filled cysts to develop in the kidneys. The purpose of this study is to assess the safety and efficacy of ABBV-CLS-628 for the treatment of ADPKD in adult participants. ABBV-CLS-628 is an investigational drug being developed for the treatment of ADPKD. Participants are placed in 1 of 4 groups, called treatment arms. Each group receives a different treatment. There is a 1 in 4 chance that participants will be assigned to placebo. Around 240 adult participants with ADPKD will be enrolled at approximately 100 sites worldwide. Participants will receive IntraVenous ABBV-CLS-628 or placebo every 4 weeks for 92 weeks. Participants will be followed for up to 15 weeks. There may be higher treatment burden for participants in this trial compared to their standard of care . Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires.

Title: Development of a clinical experimental heat stress protocol and exploration of the effect of Niacinamide on physiologic, metabolic, and biochemical responses to heat stress

Brief Title: Experimental heat stress metabolomics and the effect of Nam

Brief Summary: The goal of this clinical trial is to learn about the processes occurring in the kidneys while under heat stress in healthy volunteers. The main questions it aims to answer are: - How do the chemicals produced by the body change under conditions of higher versus lower heat stress? - What role does a specific area of the body's metabolism, known as NAD+ metabolism, play in the body's response to heat stress, and can this response be modified by taking vitamin B3?

Title: A Phase 2/3 Adaptive, Double-blind, Placebo- Controlled Study to Evaluate the Efficacy and Safety of VX-147 in Adults and Pediatric Subjects With APOL1-mediated Proteinuric Kidney Disease

Brief Title: Phase 2/3 Adaptive Study of VX-147 in Adults With APOL1-medi

Brief Summary: The purpose of this study is to evaluate the efficacy, safety, tolerability, and pharmacokinetics (PK) of VX-147 in adult and pediatric participants with apolipoprotein L1 (APOL1)-mediated proteinuric kidney disease.