CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 84 enrolled
Drug / intervention
TransCon CNP +1 moredrug
Likely dose
TransCon CNP 100 µgfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05598320
NCT05598320Phase 3Completed

A Phase 2b, Multicenter, Double-Blind, Randomized, Placebo-controlled Trial Evaluating Efficacy and Safety of Subcutaneous Doses of TransCon CNP Administered Once Weekly for 52 Weeks in Children With Achondroplasia Followed by an Open Label Extension Period

Ascendis Pharma Growth Disorders A/S·interventional·Posted Oct 28, 2022·Updated Jan 15, 2026

In Brief

A Phase 3 clinical trial evaluating TransCon CNP and Placebo for TransCon CNP for Achondroplasia. Completed, enrolled 84 participants across 10 sites in 7 countries.

Detailed Summary

The purpose of this clinical trial is to evaluate efficacy and safety of once weekly SC doses of 100 µg CNP/kg compared to placebo on Annualized Growth Velocity after a 52-week randomized treatment period in children aged 2 to 11 years with genetically confirmed Achondroplasia. The double-blind, placebo-controlled treatment period is followed by an Open Label Extension (OLE) period of a 52-week duration.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsAchondroplasia
CountriesAustralia, Canada, Denmark, Ireland, New Zealand, Spain, United States
Collaborators--

Timeline

Phase 3CompletedFinished
2023202420252026
First PostedOct 28, 2022
Enrollment StartMar 3, 2023
Primary CompletionAug 9, 2024
Study CompletionAug 13, 2025
TodayJul 2, 2026
Enrollment to primary: 1.4 yearsPosted 3.7 years ago

Interventions

TransCon CNPdrug

Once-weekly subcutaneous injection of 100 µg/kg TransCon CNP

Placebo for TransCon CNPdrug

Once-weekly subcutaneous injection of 100 µg/kg placebo for TransCon CNP