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Experimental Antisense Oligonucleotide for DRPLA with ATN1 Mutation

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Study Aim

This study aims to evaluate the safety and tolerability of an experimental antisense oligonucleotide treatment in individuals with Dentatorubral-Pallidoluysian Atrophy who have the ATN1 mutation.

What is being tested

nL-ATN1-001

Drug
Who is being recruted

Epileptic Syndromes+5

+ Brain Diseases

+ Central Nervous System Diseases

Over 22 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Phase 1 & 2
Interventional
Study Start: November 2025
See protocol details

Summary

Principal Sponsorn-Lorem Foundation
Last updated: December 11, 2025
Sourced from a government-validated database.Claim as a partner

Study start date: November 1, 2025

Actual date on which the first participant was enrolled.

This clinical trial focuses on evaluating a new treatment approach for a rare genetic disorder called Dentatorubral-pallidoluysian Atrophy (DRPLA), which is caused by a specific mutation in the ATN1 gene. The study is designed to test the safety and effectiveness of a new drug called antisense oligonucleotide (ASO) in a single participant. DRPLA is a serious condition that affects movement and mental functions due to genetic changes, and finding effective treatments is crucial as current options are limited. In this study, the participant receives the experimental ASO treatment, which is customized for their specific genetic mutation. The treatment is administered, and researchers closely monitor the participant to assess how safe the treatment is and how well it works. Although no specific outcomes are listed, the study likely involves regular check-ups and tests to observe any changes in symptoms or side effects, helping researchers understand the potential benefits and risks of this new approach for DRPLA.

Official TitleAn Open-label Single Center, Single Participant Study of an Experimental Antisense Oligonucleotide Treatment for Dentatorubral-pallidoluysian Atrophy (DRPLA) Due to ATN1 Mutation 
NCT07221760
Principal Sponsorn-Lorem Foundation
Last updated: December 11, 2025
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

1 patient to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Male

Biological sex of participants that are eligible to enroll.

Over 22 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Epileptic SyndromesBrain DiseasesCentral Nervous System DiseasesEpilepsyEpilepsy, GeneralizedEpilepsies, MyoclonicNervous System DiseasesMyoclonic Epilepsies, Progressive

Criteria

Inclusion Criteria: * Informed consent/assent provided by the participant (when appropriate), and/or participant's parent(s) or legally authorized representative(s) * Ability to travel to the study site and adhere to study-related follow-up examinations and/or procedures and provide access to participant's medical records * Genetically confirmed Dentatorubral-pallidoluysian atrophy (DRPLA) due to ATN1 mutation Exclusion Criteria: * Use of investigational medication within 5 half-lives of the drug at enrolment * Participant has any condition that in the opinion of the Site Investigator would ultimately prevent the completion of study procedures

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

One single intervention group is designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Dell Children's

Austin, United StatesSee the location
Recruiting soonOne Study Center