CClinicalTrials.gg
RecruitingNCT07451613REGEN4HDUpdated Apr 13, 2026

Safety and Tolerability Study of Human Neural Stem Cells for Huntington's Disease

A Phase 1/2 interventional study of hNSC-01 in Huntington Disease, sponsored by Leslie Thompson. Recruiting at 1 site in United States. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2026-04-13.

Sponsored by Leslie Thompson · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Started Apr 2026; still recruiting 6 months later.
Phase
Phase 1/2
Study type
Interventional
Enrollment
21
Allocation
Non-randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

The purpose of this research study is to determine whether an implantation of hNSC-01 is a safe and tolerable study intervention for Huntington's disease. This study is the first time that hNSC-01 is being tested in people.

02

Conditions studied

  • Huntington Disease

Browse trials for

Keywords

  • Huntington's disease
  • stem cell
  • REGEN4HD
03

In context

Huntington Disease

285 studies on the registry are indexed under Huntington Disease; 49 are open to participants now.

This study's planned enrollment of 21 is below the median of 40 across 203 interventional studies indexed under Huntington Disease.

Browse Huntington Disease studies →

Lead sponsor

This is the only study on the registry with Leslie Thompson as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Please note this may not be a complete list of eligibility criteria.

Inclusion criteria

Inclusion Criteria:

  • Have decision-making capacity and be able to provide written informed consent.
  • Are between 18 to 65 years of age
  • Have genetically confirmed diagnosis of Huntington's Disease
  • Able to undergo MRI scans, tolerate neurosurgical procedure, blood draws and lumbar puncture.

Exclusion criteria

Exclusion Criteria:

  • Are pregnant
  • Test positive for human immunodeficiency virus (HIV), hepatitis C or chronic hepatitis B at Screening
  • Have an implanted deep brain stimulation device.
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
21 participants (estimated)

Study arms

  • Active comparator
    Cohort A

    Unilateral, low dose

    Biological: hNSC-01

  • Active comparator
    Cohort B

    Bilateral, low dose

    Biological: hNSC-01

  • Active comparator
    Cohort C

    Bilateral, mid-dose

    Biological: hNSC-01

  • Active comparator
    Cohort D

    Bilateral, high dose

    Biological: hNSC-01

Interventions

  • BiologicalhNSC-01

    neural stem cell therapy

06

What researchers measure

Primary outcomes

  1. Number of participants with treatment-related adverse events as assessed by CTCAE v5.0 after 6 and 12 weeks after dosing.

    To determine the safety and tolerability of hNSC-01s implanted into the striatum of individuals affected with HD.

    Time frame: Safety is assessed 6 weeks following each surgery for Cohort A and 12 weeks following cohort B-D completion

Secondary outcomes

  1. Number of participants with treatment-related adverse events as assessed by CTCAE v5.0 after 12 months after dosing.

    Longer term (12 month) safety of implantation with absence of development of clinically significant inflammatory and/or immune reaction, and adverse events related to clinical safety laboratory tests, vital signs, ECGs, neurological and physical examinations.

    Time frame: 12 months

  2. Change in Total Motor Score (TMS)

    To evaluate change in TMS after 1-year post-implantation.

    Time frame: 12 months

  3. Change in Functional Imaging: FDG-PET

    To evaluate change in Functional Imaging: FDG-PET at 12 months compared to Baseline

    Time frame: 12 months

  4. Change in structural MRI

    To evaluate change in structural MRI at 12 months compared to Baseline

    Time frame: 12 months

  5. Change in NfL in CSF.

    To evaluate change in NfL levels in CSF.

    Time frame: 12 months

  6. Change in NfL in plasma.

    To evaluate change in NfL levels in plasma.

    Time frame: 12 months

  7. Change in PENK levels in CSF.

    To evaluate change in PENK levels in CSF.

    Time frame: 12 months

  8. Change in cognition using the MMSE.

    To evaluate change in cognition using the MMSE.

    Time frame: 12 months

  9. Change in cognition using Stroop Word Reading Test.

    To evaluate change in cognition using the Stroop Word Reading Test.

    Time frame: 12 months

  10. Change in Total Functional Capacity (TFC)

    To evaluate change in Total Functional Capacity (TFC) after 1-year post-implantation

    Time frame: 12 months

  11. Change in Problem Behaviors Assessment-short version

    Assess improvement in Problem Behaviors Assessment - short version (PBA-s) score

    Time frame: 12 months

07

Study locations

1 of 1 sites recruiting
  • University of California, Irvine
    Irvine, California 92697, United States
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes

Supporting information: Study protocol, Sap, Icf

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 13, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07451613
Lead sponsor
Leslie Thompson
Collaborators
California Institute for Regenerative Medicine (CIRM), University of California, Irvine
Responsible party
Leslie Thompson (Bren Professor, Departments of Psychiatry and Human Behavior, Neurobiology and Behavior, and Biological Chemistry, Co-Director, UCI Sue & Bill Gross Research Center, University of California, Irvine) — Sponsor-investigator
First posted
Mar 5, 2026
Start date
Apr 6, 2026
Primary completion
Jun 2028 (estimated)
Completion
Jan 2031 (estimated)
Last update
Apr 13, 2026

Study contacts

UCI Alpha Clinic
Contact
alphaclinic@hs.uci.edu
949-824-3990

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion