Rayaldee

Approximately 56 participants who are 1 month old to 17 years old will be enrolled in this study. The total duration for this study will be 38 weeks (or up to 42 weeks when participants require a washout period due to prior exposure to prohibited medications) and includes the following periods: * Active screening period of 6 weeks (or, up to 10 weeks for participants requiring a washout period). * Treatment period of 28 weeks consisting of a 19-week dose titration period and 9-week stable dose period. * Safety follow-up period of 4 weeks.

The goal of this clinical trial is to evaluate safety, tolerability, and how CTAP101 Capsules work to treat Pediatric Participants with Secondary Hyperparathyroidism, Stage 3 or 4 Chronic Kidney Disease and Vitamin D Insufficiency. The main questions it aims to answer are: 1. To assess the pharmacokinetics (PK) and Pharmacodynamics (PD) of CTAP101 Capsules 2. To investigate the safety and tolerability of CTAP101 Capsules Participants will take a daily dosage of CTAP101 Capsules at bedtime for 8 weeks.

The goal of this clinical trial is to learn if a home-based exercise program can be safely and feasibly used to improve physical activity and physical function in adults waiting for a kidney transplant. The study will also learn how acceptable and useful this program is for participants. The main questions it aims to answer are: * Can a remote exercise program be delivered successfully to people on the kidney transplant waiting list? * Do participants follow the exercise program and wear a physical activity tracker as asked? * Is the program safe and well tolerated? Researchers will compare two groups to see if the exercise program leads to higher physical activity and better physical function: * Usual pre-transplant care with a physical activity tracker * Usual pre-transplant care plus an online exercise program Participants will: * Wear a wrist activity tracker to measure daily physical activity * Complete a one-week baseline period before being assigned to a study group * Be randomly assigned (like flipping a coin) to one of two groups * If assigned to the exercise group, take part in online exercise classes at home for 12 weeks with reminders and feedback, and then another 12 weeks without reminders and feedback * Answer questionnaires about their health, activity, and experience in the study This study may help researchers learn how to better support people waiting for kidney transplant through safe, home-based exercise programs.

The goal of this crossover clinical trial is to explore the effects of red meat intake on serum and fractional urinary excretion of uremic toxins including trimethylamine N-oxide in people with chronic kidney disease.

This phase 1B trial tests the safety, side effects and best dose of rh-Hsc70- BZLF1 peptide complex (OSU-2131) with Stimulon (Trademark) QS-21 and evaluates how well it works in preventing Epstein-Barr virus (EBV) infection and related cancers in healthy volunteers and patients awaiting a solid organ transplant. Currently, patients who receive an organ transplant receive immune suppression therapy which can make it harder for the body to fight infections. This treatment also increases the risk for cancers that are triggered by the EBV. Vaccines made from synthetic peptide (RAKFKQLL) derived from the BZLF1 protein, may help the body build an effective immune response against EBV infections. QS-21, a saponin adjuvant, is a substance from plants that, when given with vaccine therapy, may improve the way the immune system responds to disease. Giving OSU-2131 with QS-21 may help the immune system fight EBV and protect against EBV infection and the cancers that it can cause in patients awaiting solid organ transplants.

The goal of this clinical trial is to learn about the safety (good or bad) of giving two AION-301 intravenous (IV) infusions, in adults with Stage 3 Chronic Kidney Disease (CKD). It will also help to learn if AION-301 reduces the symptoms of CKD and/or progression. The main questions it aims to answer are: * Do participants have medical problems (adverse events) after receiving two infusions of AION-301? * Do participants feel better (have reduced and/or delayed CKD symptoms)? * To learn about how AION-301 works in participants with CKD? Researchers will compare AION-301 to a placebo (a look-alike substance that contains no drug) to see if AION-301 works to treat Stage 3 CKD. Participants will: * Receive two infusions of AION-301 or placebo on two separate days (Day 0 and Day 4). * Receive oral vitamins at the clinic and to take at home for 90 days. * Visit the clinic for a minimum of 9 times, over 6 months for checkups and tests, but could be up to 12 times, over 24 months for checkups and tests.

This trial tests a special stem cell transplant followed by a kidney transplant in patients who need a new kidney. The goal is to prevent kidney rejection without lifelong medication by preparing the immune system to accept the new kidney.

This is a phase 3 trial of etelcalcetide in pediatric participants with secondary hyperparathyroidism (SHPT) and chronic kidney disease (CKD) on hemodialysis.