Long Term Follow-up Study of AAVAnc80-hOTOF Gene Therapy

April 1, 2026 updated by: Akouos, Inc.

An Evaluation of the Long Term Safety and Efficacy of AAVAnc80-hOTOF Gene Therapy in Individuals With Sensorineural Hearing Loss Due to Otoferlin Gene Mutations

This multi-center, observational, post-intervention long term follow-up (LTFU) study will monitor for safety and efficacy of AAVAnc80-hOTOF in individuals with sensorineural hearing loss due to otoferlin gene mutations who have previously received intracochlear administration of AAVAnc80-hOTOF in the AK-OTOF-101 Clinical Trial.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Enrolling by invitation

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

After completing one year of initial safety and efficacy assessments following an intracochlear administration of AAVAnc80-hOTOF in AK-OTOF-101, participants will continue to be observed for an additional approximately four years of safety and efficacy follow-up in this LTFU study, for a total of approximately five years of safety and efficacy observations after vector administration. For each participant, evaluations in the LTFU study will occur at approximately one and a half years and two years after vector administration, followed by annual visits through Year 5; the duration in this LTFU study is approximately four years, with the aim of understanding and mitigating any risks related to delayed adverse events, as well as characterizing the durability of effect of the AAVAnc80-hOTOF.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
30

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Spain
    • Barcelona
      • Esplugues de Llobregat, Barcelona, Spain, 08950
        • Hospital Sant Joan de Déu
  • Taiwan
    • Taiwan
      • Taipei, Taiwan, Taiwan, (R.O.C), 100
        • National Taiwan University Hospital
  • United States
    • Iowa
      • Iowa City, Iowa, United States, 52242
        • University of Iowa
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
        • Boston Children's Hospital
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19146
        • Children's Hospital of Philadelphia

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Individuals with otoferlin gene-mediated hearing loss who received intracochlear administration of AAVAnc80-hOTOF in the AK-OTOF-101 Clinical Trial.

Description

Inclusion Criteria:

  • Individuals with otoferlin gene-mediated hearing loss who received intracochlear administration of AAVAnc80-hOTOF in the AK-OTOF-101 Clinical Trial
  • Legally authorized representative and/or participant willingness to comply with all study requirements, as evidenced by successful completion of the informed consent process or permission and participant assent process (where appropriate)

Exclusion Criteria:

  • Any condition that would not allow the potential participant to complete follow-up examinations during the course of the study and/or, in the opinion of the Investigator, makes the potential participant unsuitable for the study

Study Plan

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

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Study Participants
Individuals with otoferlin gene-mediated hearing loss who received intracochlear administration of AAVAnc80-hOTOF in the AK-OTOF-101 Clinical Trial

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Long term safety of AAVAnc80-hOTOF, including the incidence and frequency of late-occurring adverse events (AEs)
Time Frame: Through study completion, approximately four years.

The following adverse events will be collected:

  1. The development of new or exacerbation of malignancies (oncologic), neurologic, rheumatologic or other autoimmune, hematologic disorders, or new infections (if the infection is potentially related to AAVAnc80-hOTOF
  2. AEs that are related to AAVAnc80-hOTOF and/or the administration procedure
  3. AEs of special interest
  4. All serious adverse events regardless of severity or of relationship to participation in the AK-OTOF-101 Clinical Trial
Through study completion, approximately four years.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Auditory Brainstem Response (ABR) Threshold
Time Frame: Through study completion, approximately four years.
Changes in ABR intensity threshold (decibels normal hearing level [dB nHL])
Through study completion, approximately four years.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Akouos, Inc.

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Eli Lilly and Company

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Peter Marks, M.D., Eli Lilly and Company

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 11, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2033

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2033

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 18, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 19, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 20, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 6, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 1, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • AK-OTOF-LTFU

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings