PH1

This is a single-arm, open-label, single-dose dose-escalation study. It aims to evaluate the safety and tolerability of YOLT-203 in Chinese patients with Primary Hyperoxaluria Type 1 (PH1), and to preliminarily assess the effect of a single administration of YOLT-203 on 24-hour urinary oxalate excretion. The clinical trial will first evaluate the safety and tolerability in adult patients. After the safety profile is preliminarily confirmed, the trial will be sequentially conducted in adolescents, older children, and younger children.

This study will be conducted to evaluate the efficacy and safety of YOLT-203 in children and adults with Primary Hyperoxaluria Type 1. After the initial randomized, 6-month double-blind, placebo-controlled period, participants who were initially assigned to placebo will receive a single-dose of YOLT-203 treatment whereas participants in the YOLT-203 group will receive a single-dose of placebo infusion. For patients interested in additional information on how to participate, please follow this link: https://mytomorro.ws/ph1trial.