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Parkinson's DiseasePhase 1STARNCT06683378

A Study to Evaluate Feasibility, Safety, and Clinical Responses of Implanting Autologous Peripheral Nerve Tissue Into the Brain for Non-motor or Motor Symptoms in Patients With Parkinson's Disease Undergoing DBS Surgery

A Phase 1 study testing Reparative Autologous peripheral nerve tissue in people with Parkinson's Disease, run by Craig van Horne, MD, PhD at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The investigators propose a Phase I single surgical-center, double-blinded randomized parallel clinical trial involving bilateral autologous peripheral nerve tissue (PNT) delivery into the NBM or the alternate target also affecting cognition in this population, the substantia nigra (SN), to address "repair cell"… Read more about this study

Who is it for?
Ages 45 to 75 years
Conditions the study is for
Parkinson's Disease
What is being tested?
Reparative Autologous peripheral nerve tissue
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
24 participants
Where
1 siteUnited States
Study dates
21 Jul 2025to 28 May 2030
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 45 to 75 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Undergoing DBS
  • Diagnosis of clinically established or clinically probably PD as defined by MDS criteria
  • Age 45-75, inclusive
  • Able to tolerate the surgical procedure
  • Able to undergo all planned assessments
  • Available access to the sural nerve

Who cannot join

  • Any condition that would not make the subject a candidate for DBS
  • Dementia diagnosis
  • Previous PD surgery or intracranial surgery
  • Unable to undergo an MRI
  • An obstructed trajectory path to the substantia nigra and nucleus basalis of Meynert

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Group Monitored Email contact

nervegraft@uky.edu

United States1 site, 1 recruiting
  • University of Kentucky

    Lexington, Kentucky, 40536

    Jaimie Hixson, 859-323-1908, jaimie.henderson@uky.edu

    Recruiting

Other trials in United States

About this study

Official title: Phase I Randomized, Double-blind Study to Evaluate Feasibility, Safety, and Clinical Responses of Implanting Autologous Peripheral Nerve Tissue Into the Nucleus Basalis of Meynert or Substantia Nigra for Non-motor or Motor Symptoms in Patients With Parkinson's Disease Undergoing DBS Surgery

The investigators propose a Phase I single surgical-center, double-blinded randomized parallel clinical trial involving bilateral autologous peripheral nerve tissue (PNT) delivery into the NBM or the alternate target also affecting cognition in this population, the substantia nigra (SN), to address "repair cell" support of these areas. Twenty-four participants with idiopathic Parkinson's Disease (PD) who have selected, qualified and agreed to receive as standard of care deep brain stimulation (DBS) will be enrolled and randomly allocated to receive bilateral PNT deployment to either the NBM or SN at the time of DBS surgery. Participants will be allocated equally among both assignments over the course of three years (8 Year 1, 10 Year 2, 6 Year 3). Participants will be evaluated for neurocognitive, motoric function, activities of daily living, and quality of life at enrollment before surgery, two-weeks after surgery, and 6, 12, and 24 months after surgery.

Being tested
Reparative Autologous peripheral nerve tissue
Keywords
Parkinson's Disease, Deep Brain Stimulation, DBS, Cell and Tissue Based Therapy
Medical subject headings
Parkinson Disease

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Reparative Autologous peripheral nerve tissueProcedure or surgery

    At the time participants are receiving the standard of care deep brain stimulation (DBS) surgery, a standard incision on the lateral aspect near the ankle is made, the sural nerve is identified, an about 3 cm biopsy of the sural nerve is obtained and the incision is closed.

    From the biopsied section, the epineurium is removed, fascicles are cut, and (~5 pieces per side; ~ 5mm length x 1.5 mm diameter: approximately 10 cubic millimeters) implanted bilaterally into the nucleus basalis of Meynert (NBM) or substantia nigra (SN).

Study groups in NCT06683378
Study groupRoleWhat they receive
Peripheral nerve tissue (PNT) deployment to the Substantia NigraActive comparatorNot described
Receives: Procedure: Reparative Autologous peripheral nerve tissue
Peripheral nerve tissue (PNT) deployment to the nucleus basalis of MeynertActive comparatorNot described
Receives: Procedure: Reparative Autologous peripheral nerve tissue

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Successful deployment of bilateral peripheral nerve tissue (PNT) into the brain

    Number of participants in each study arm who successfully receive bilateral PNT delivery.

    Measured: Intraoperative

  2. Number of participants completing 12 month study visit

    Total number of participants to complete study visit by arm assignment

    Measured: 12-month study visit

  3. Study-related adverse events as assessed by MedDRA v27

    Total number of study-related adverse events experienced by participants.

    Measured: Enrollment to 24-month study visit

  4. Study-related serious adverse events as assessed by MedDRA v.27

    Total number of serious adverse events experienced by participants

    Measured: Enrollment to 24-month study visit

Secondary outcomes (14)
  1. PNT deployment attempts

    Number of deployment attempts required, per participant, to deliver bilateral PNT by group allocation

    Measured: During surgery

  2. Mean change in Montreal Cognitive Assessment (MoCA) scores

    Mean change in MoCA scores for participants at study visits compared to baseline by group allocation. Assessment is scored from 0-30 with a score of 26 or better indicating normal cognition. A score less than 26 indicates a cognitive deficit.

    Measured: Baseline 6, 12 and 24 months after surgery

  3. Mean change in Neuropsychological assessment scores

    Participants complete a neuropsychological assessment battery that meets the Movement Disorder Society (MDS) guidelines for determining mild cognitive impairment/mild neurocognitive disorder. Domains include attention and working memory, executive functioning, memory (verbal and visual), language, and visuospatial skills. Participants' raw scores will be converted to standardized scores based on appropriate norms (e.g., age-based norms). Participants' 12 and 24-month re-evaluation will be compared to their baseline pre-surgical assessment to determine change from baseline on each measure. A change that exceeds 1.5 standard deviation from their baseline performance will be considered notable.

    Measured: Baseline, 12 and 24 months

  4. Change in Neuropsychological diagnosis

    Changes in participant neuropsychological diagnoses during scheduled evaluations will be reported. e.g. No cognitive diagnosis progressing to mild neurocognitive disorder.

    Measured: Baseline, 12 and 24 months

  5. Change in Neuropsychological domains with impairment

    A count of the number of domains with impairment at each study visit to compare with previous study visits.

    Measured: At 12, 24 months compared to baseline

  6. Mean change in Modified Schwab and England Scale of Activities of Daily Living scores

    Mean change participant independence levels as measured in Schwab and England Scale of Activities of Daily Living scores. 100% = completed independent and 0% being completely dependent.

    Measured: At 6, 12, 24 months compared to baseline

  7. Mean change in Parkinson's Disease Questionnaire-8 (PDQ-8) quality of life scores

    Assess changes in participant's quality of life. Questionnaire is scored from 0-32 with higher scores indicating poorer quality of life.

    Measured: At 12 and 24 months compared to baseline

  8. Mean change in Non-motor symptom scale scores

    Assessment used to identify Parkinson's disease related non-motor symptoms experienced by participants. The scale measures the frequency and severity of symptoms and is scored from 0-360 with higher scores indicating more frequent and severe symptoms.

    Measured: At 12 and 24 months compared to baseline

  9. Mean change of the Movement Disorder Society - Unified Parkinsons Disease Rating Scale (MDS-UPDRS) Part I scores

    MDS-UPDRS Part I scores non-motor symptoms effecting activities of daily living in those with Parkinson's Disease. Scores range from 0-52 with higher scores indicating greater symptom severity.

    Measured: 6, 12, and 24 months as compared to baseline

  10. Mean change of the MDS-UPDRS Part II scores

    MDS-UPDRS Part II scores motor symptoms effecting activities of daily living in those with Parkinson's Disease. Scores range from 0-52 with higher scores indicating greater symptom severity.

    Measured: At 6, 12, 24 months compared to baseline

  11. Mean change in MDS-UPDRS Part III scores

    MDS-UPDRS Part III scores motor symptoms associated with Parkinson's Disease. Part III scores range from 0-132 with higher scores indicating higher symptom severity.

    Measured: At 6, 12, 24 months compared to baseline

  12. Mean change in MDS-UPDRS Part IV scores

    MDS-UPDRS Part IV scores motor complications such as fluctuations and dyskinesia's associated with anti-Parkinson's medications. Scores range from 0-24 with higher scores indicating greater severity in motor complications.

    Measured: At 6, 12, and 24 months compared to baseline

  13. Number of participants completing 24-month study visit

    Total number of participants completing 24 month study visit by group allocation

    Measured: 24-month study visit

  14. Mean change in Dementia Rating Scale (DSRS)

    A survey to assess and rate changes the cognitive and behavioral functioning of participants. Scale is scored from 0-54 with being higher numbers indicating greater dementia severity.

    Measured: Baseline 6, 12 and 24 months after surgery

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 Nov 2024
  2. Study start21 Jul 2025
  3. Primary completion31 Dec 2028 (estimated)
  4. Study completion28 May 2030 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
24 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06683378
Sponsor's protocol ID
90066
Other IDs
1R01AG081356-01A1
Acronym
STAR
Status last verified
Aug 2026
First submitted
7 Nov 2024
Last updated
31 Aug 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: The focus of this study is PD, but images and results will be made available to other researchers by asking participants, at the time of consent, their willingness to permit sharing of data and bio-specimens.

Publications

  • Daly SR, Quintero JE, Koehl L, Wallace E, Guduru Z, Gurwell JA, Hines T, Hixson J, Hulou S, Slevin JT, Schmitt FA, Gerhardt GA, van Horne CG. Autologous Peripheral Nerve Tissue Grafts Implanted into the Nucleus Basalis of Meynert and Substantia Nigra at the Time of Bilateral Deep Brain Stimulation in Parkinson Disease: A Report of 2 Cases. Neurosurg Pract. 2025 Dec 15;7(1):e000189. doi: 10.1227/neuprac.0000000000000189. eCollection 2026 Mar.

    PubMed 41399615
  • Ali S, Quintero JE, Richert M, Koehl L, Anderson-Mooney AJ, Gurwell JA, Manning KS, Hulou S, Hines T, Slevin JT, Gerhardt GA, Schmitt FA, van Horne CG. Implantation of autologous peripheral nerve tissue to the nucleus basalis of Meynert in patients with Parkinson's disease during deep brain stimulation surgery: a 2-year report of safety, feasibility, and clinical response. J Neurosurg. 2026 Aug 14:1-10. doi: 10.3171/2026.3.JNS251474. Online ahead of print.

    PubMed 42600181
  • Quintero JE, Chau MJ, Slevin JT, Koehl L, Gurwell JA, Wallace E, Kryscio RJ, El Khouli R, Anderson-Mooney AJ, Schmitt FA, Gerhardt GA, van Horne CG. Two-year feasibility and safety of open-label autologous peripheral nerve tissue implantation during deep brain stimulation in patients with Parkinson's disease. J Parkinsons Dis. 2025 Mar;15(2):397-408. doi: 10.1177/1877718X241312409. Epub 2025 Feb 25.

    PubMed 40007169
  • van Horne CG, Quintero JE, Slevin JT, Anderson-Mooney A, Gurwell JA, Welleford AS, Lamm JR, Wagner RP, Gerhardt GA. Peripheral nerve grafts implanted into the substantia nigra in patients with Parkinson's disease during deep brain stimulation surgery: 1-year follow-up study of safety, feasibility, and clinical outcome. J Neurosurg. 2018 Dec 1;129(6):1550-1561. doi: 10.3171/2017.8.JNS163222. Epub 2018 Feb 18.

    PubMed 29451447
  • Quintero JE, Slevin JT, Gurwell JA, McLouth CJ, El Khouli R, Chau MJ, Guduru Z, Gerhardt GA, van Horne CG. Direct delivery of an investigational cell therapy in patients with Parkinson's disease: an interim analysis of feasibility and safety of an open-label study using DBS-Plus clinical trial design. BMJ Neurol Open. 2022 Jul 14;4(2):e000301. doi: 10.1136/bmjno-2022-000301. eCollection 2022.

    PubMed 35949912

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Reparative Autologous peripheral nerve tissue in people with Parkinson's Disease, run by Craig van Horne, MD, PhD at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 31 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Jaimie Hixson (8593231908, jaimie.henderson@uky.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Successful deployment of bilateral peripheral nerve tissue (PNT) into the brain (time frame: Intraoperative). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06683378, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 31 Aug 2026.

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