Long-Term Follow Up of CLN6 Batten Disease Subjects Following Gene Transfer

N/AActive Not RecruitingNCT04273243

Emily de los Reyes10 enrolled

Overview

This is a long-term safety and efficacy study in subjects with CLN6 Batten disease who previously received a single intrathecal administration of AT-GTX-501.

This is a long-term safety and efficacy study in subjects with CLN6 Batten disease (also know as variant late infantile neuronal ceroid lipofuscinosis associated with mutation(s) in the CLN6 gene \[vLINCL6\] disease),who previously received a single intrathecal administration of AT-GTX-501. The assessments described in this long-term follow-up (LTFU) study (AT-GTX-501-02) are performed following and in addition to the initial 2 years of post-treatment assessments in the treatment study (AT-GTX-501-01). In this LTFU study, subjects complete safety and efficacy assessments throughout the study's 3-year duration. Combining the duration of the initial treatment study and this LTFU study, the overall duration reflects a follow-up period up-to 5 years since gene transfer via AT-GTX-501. The primary outcome for this study is to assess the long-term safety of AT-GTX-501 in subjects with CLN6 Batten disease. The secondary outcome measure of this study is to assess the long-term efficacy of AT-GTX-501 in subjects with CLN6 Batten disease.

Study Type

OBSERVATIONAL

Enrollment

Conditions

CLN6 Batten Disease

Interventions

AT-GTX-501GENETIC

No study drug is administered in this study. Subjects who received AT-GTX-501 in a previous trial will be evaluated in this trial for long-term safety and efficacy.

Eligibility

Sex: ALLMin age: 12 Months

Medical Language ↔ Plain English

Inclusion Criteria: * Subject received AT-GTX-501 (scAAV9.CB.CLN6) in the study "Phase I/IIa Gene Transfer Clinical Trial for Variant Late Infantile Neuronal Ceroid Lipofuscinosis, Delivering the CLN6 Gene by Self-Complementary AAV9." * Subject completed or prematurely discontinued from the study "Phase I/IIa Gene Transfer Clinical Trial for Variant Late Infantile Neuronal Ceroid Lipofuscinosis, Delivering the CLN6 Gene by Self-Complementary AAV9." * Subject has a legally authorized representative who has provided written informed consent and authorization for use and disclosure of personal health information or research-related health information. Exclusion Criteria: * None

Locations (1)

Nationwide Children's Hosptial

Columbus, Ohio, United States

Outcomes

Primary Outcomes

Long-term safety assessment based on Adverse Events (AEs)

All AEs that occur during this study will be classified as treatment-emergent adverse events (TEAEs), as AT-GTX-501 was previously received by all subjects in this study.

Time frame: up to 3 years

Secondary Outcomes

Hamburg Scale

The Hamburg scale is an established tool to capture the rate of decline or regression. From the Hamburg Scale, the individual motor and language scores and the motor plus language aggregated score will be summarized.

Time frame: up to 3 years

Data from ClinicalTrials.gov

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