Evaluation of Safety, Tolerability, and Efficacy of INZ-701 in Adults With ENPP1 Deficiency

Generalized Arterial Calcification of Infancy Clinical Trial

Official title: A Phase 1/2, Open-Label, Multiple Ascending Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of INZ-701 Followed by an Open-Label Long-Term Extension Period in Adults With ENPP1 Deficiency

Status Recruiting

Clinical Trial Summary

The purpose of this study is to assess the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of multiple ascending doses of INZ-701, an ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) enzyme replacement therapy, for the treatment of ENPP1 Deficiency. The goal of the study is to identify a dose regimen for further clinical development in the treatment of ENPP1 Deficiency.

Clinical Trial Description

INZ-701 is an ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) enzyme replacement therapy in development for the treatment of ENPP1 Deficiency, an ultra rare genetic disorder. Study INZ701-101 is a Phase 1/2, multi-center, first-in-human (FIH), multiple ascending dose (MAD), dose-finding study followed by a long-term open-label Extension Period conducted in adults with ENPP1 Deficiency. This study is designed to assess the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of multiple ascending doses of INZ-701. The goal of the study is to identify a dose and dose schedule (number of doses per week) for further clinical development. Exploratory endpoints for the Extension Period of the study include evaluations of skeletal assessment (X-ray and DEXA), arterial and organ calcification (either Na18F-PET/CT or low dose CT [full body] without contrast, echocardiogram, and renal ultrasound), and cardiovascular function (echocardiogram) as well as patient reported outcomes. Subject participation consists of a Screening Period of up to 30 days, a 32-day Dose Evaluation Period, and an Extension Period during which subjects may continue to receive INZ-701 (with options for self-, caregiver-, or healthcare provider administration) until INZ-701 is approved and available in the country where the subject resides or until an alternative study for subjects to continue receiving study drug is available. During the Extension Period, follow-up visits will be conducted every 4 weeks until Week 48, followed by every 12 weeks until the subject leaves the study. Subjects will complete a follow up visit 30 days after their last dose of INZ-701. ;

Related Conditions & MeSH terms

• Autosomal Recessive Hypophosphatemic Rickets
• Calcinosis
• Ectonucleotide Pyrophosphatase/phosphodiesterase1 Deficiency
• Familial Hypophosphatemic Rickets
• Generalized Arterial Calcification of Infancy
• Rickets
• Vascular Calcification

• NCT number: NCT04686175
• Study type: Interventional
• Source: Inozyme Pharma
• Contact: Inozyme Clinical Trial Information
• Phone: +1 857 330 4340
• Email: clinicaltrials@inozyme.com
• Status: Recruiting
• Phase: Phase 1/Phase 2
• Start date: November 21, 2021
• Completion date: December 5, 2023