Safety and Tolerability Study With VY-HTT01, in Adults With Early Manifesting Huntington's Disease

August 9, 2021 updated by: Voyager Therapeutics

A Phase 1B, Open-label, Randomized, Controlled, Multicenter, Dose Escalation Study of the Safety, Tolerability, and Biological Effects of VY-HTT01 Administered Via Intraparenchymal Infusion of the Putamen and Thalamus in Adults With Huntington's Disease

This is the first clinical study of VY-HTT01, a gene therapy for early-stage Huntington's Disease (HD) patients. The primary goal of this trial is to evaluate the safety and tolerability of VY-HTT01. This study is a first in human study, Phase 1b, open-label, randomized, multicenter, dose escalation study with a delayed treatment control arm.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

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.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This dose escalation trial will evaluate the safety and tolerability of 4 single dose levels of VY-HTT01. The maximum duration that a subject randomized to treatment may be involved in the study is up to 15 months. Delayed treatment subjects will be followed for a minimum of 6 months as a control before moving up into the treatment arm in the next cohort. The maximum duration that a delayed treatment subject may be involved in the study is up to 24 months. Subjects who participate in this study will be asked to enroll in a long-term observation study.

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.
Interventional

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Must be at least 18 years old.
  • Have CAGn repeat >39.
  • Have diagnostic confidence score of 4 based on motor, cognitive, or behavioral symptoms.
  • Have a TFC score of 13 to 11.
  • Have stable dosing of neurological and psychiatric medications.
  • Capable of giving informed consent.
  • Able to comply with all procedures and study visits.

Exclusion Criteria:

  • Have any significant structural or degenerative neurologic disease other than HD.
  • Have any chronic disability, significant systemic illness and/or, unstable medical condition, or clinical findings noted.
  • Have primary or secondary immune-compromise due to infections or medical conditions or chronic therapies.
  • Have contraindications to lumbar puncture or increased risks of bleeding upon surgery.
  • Started or changed dose of a concomitant CNS medication within 30 days.
  • Had prior neurosurgical procedures that could complicate the study procedures.
  • Have used any investigational therapies within 30 days prior to Screening, oligonucleotide therapies within 9 months prior to Baseline, or any prior gene therapy.
  • Male or female with reproductive capacity and is unwilling to use highly effective contraception for 12 months after surgery.
  • Have contraindications to MRI such as claustrophobia, embedded metal in the body, or known allergy or intolerance to contrast agents.

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Cohort 1 Unilateral low dose
3.0 x 10^9 (vg/mL) rAAV1-miHHT
Genetic: Intraparenchymal rAAV1 - (mi)RNA HTT
Single dose MRI guided intraparenchymal infusion of rAAV1 - (mi)RNA HTT.
Other Names:
  • VY-HTT01
Experimental: Cohort 2 Bilateral low dose
3.0 x 10^9 (vg/mL) rAAV1-miHHT
Genetic: Intraparenchymal rAAV1 - (mi)RNA HTT
Single dose MRI guided intraparenchymal infusion of rAAV1 - (mi)RNA HTT.
Other Names:
  • VY-HTT01
Experimental: Cohort 3 Bilateral mid dose
1.7 x 10^10 (vg/mL) rAAV1-miHHT
Genetic: Intraparenchymal rAAV1 - (mi)RNA HTT
Single dose MRI guided intraparenchymal infusion of rAAV1 - (mi)RNA HTT.
Other Names:
  • VY-HTT01
Experimental: Cohort 4 Bilateral high dose
9.9 x 10^10 (vg/mL) rAAV1-miHHT
Genetic: Intraparenchymal rAAV1 - (mi)RNA HTT
Single dose MRI guided intraparenchymal infusion of rAAV1 - (mi)RNA HTT.
Other Names:
  • VY-HTT01

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
Incidence and type of AEs
Time Frame: Collected for duration of study, average of 1 year after treatment
Safety will be assessed by measuring the number and type of AE or SAEs.
Collected for duration of study, average of 1 year after treatment

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
Level of VY-HTT01 in blood
Time Frame: Collected for duration of study, average of 1 year after treatment
Change in baseline of the levels of VY-HTT01 vector genome in blood over time.
Collected for duration of study, average of 1 year after treatment
Unified Huntington Disease Rating Scale (UHDRS)
Time Frame: Collected for duration of study, average of 1 year after treatment
UHDRS will assess changes from baseline in summary scores of motor function, cognitive function, behavioral function, and functional abilities. UHDRS uses a 5-point ordinal scale ranging from 0-4 with the highest score indicating a more severe (worse) outcome.
Collected for duration of study, average of 1 year after treatment
Clinical Global Impression (CGI) Measures
Time Frame: Collected for duration of study, average of 1 year after treatment
CGI-Global Improvement measure will assess changes from baseline in CGI-Severity of Illness score. Both CGI-Global Improvement and CGI- Severity measures are based on a 7-point scale, with the highest score indicating a more severe (worse) outcome.
Collected for duration of study, average of 1 year after treatment
Huntington's Disease Quality of Life (HD-QOL) Measure
Time Frame: Collected for duration of study, average of 1 year after treatment
HD-QOL measure will assess changes from baseline in the HD-QOL score using a 40-question scale to identify quality of life in HD. HD-QOL is based on a 7-point scale of frequency ranging from "never" to "all of the time" with "extreme problems" indicating a more severe (worse) outcome.
Collected for duration of study, average of 1 year after treatment
EuroQol 5 Dimension 5 Level (EQ-5D-5L) Measure
Time Frame: Collected for duration of study, average of 1 year after treatment
EQ-5D-5L measure will assess changes from baseline in the EQ-5D-5L score across 5 domains: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. The EQ-5D-5L is scored on a 5-level severity ranking that ranges from "no problems" through "extreme problems", with "extreme problems" indicating a more severe (worse) outcome.
Collected for duration of study, average of 1 year after treatment

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Magnetic Resistance Imagining (MRI)
Time Frame: Collected for duration of study, average of 1 year after treatment
MRI assessments will include whole brain volume, white matter volume, gray matter volume, and ventricular volume, and volumes of the putamen and thalamus covered by VY-HTT01 infusions during surgery.
Collected for duration of study, average of 1 year after treatment
Levels of HTT protein in CSF
Time Frame: Collected for duration of study, average of 1 year after treatment
Change from baseline in levels of HTT protein in CSF (Cerebrospinal fluid) over time.
Collected for duration of study, average of 1 year after treatment
Levels of HTT protein in blood
Time Frame: Collected for duration of study, average of 1 year after treatment
Change from baseline in levels of HTT protein in blood over time.
Collected for duration of study, average of 1 year after treatment
Huntington's Disease Cognitive Assessment Battery (HD-CAB) Measure
Time Frame: Collected for duration of study, average of 1 year after treatment
HD-CAB measure will assess changes from baseline in the HD-CAB score for cognitive dysfunction in early manifest HD patients. HD-CAB consists of 6 tests; (1) Symbol Digit Modality Test (SDMT), (2) Paced Tapping, (3) One Touch Stockings of Cambridge, (4) Emotional Recognition, (5) Trial Making B and (6) Hopkins Learning Test. A multi-component score is derived by transforming the subject's score on each cognitive test to a z-score. The six z-scores are averaged to produce the HD-CAB score. A positive change from baseline indicates improvement in cognitive function; a negative change indicates worsening in cognitive function.
Collected for duration of study, average of 1 year after treatment
Level of Neurofilament Light chain (NfL) in CSF
Time Frame: Collected for duration of study, average of 1 year after treatment
Change from baseline in levels of NfL in CSF over time.
Collected for duration of study, average of 1 year after treatment
Level of Neurofilament Light chain (NfL) in blood
Time Frame: Collected for duration of study, average of 1 year after treatment
Change from baseline in levels of NfL in blood over time.
Collected for duration of study, average of 1 year after treatment

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.
Voyager Therapeutics

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 (Anticipated)

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.
July 30, 2021

Primary Completion (Anticipated)

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.
December 30, 2024

Study Completion (Anticipated)

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.
December 30, 2024

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).
March 2, 2021

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.
May 7, 2021

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.
May 13, 2021

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.
August 16, 2021

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.
August 9, 2021

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.
August 1, 2021

More Information

Terms related to this study

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.
  • VY-HTT01-1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

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