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Non-invasive Vagus Nerve Stimulation for Parkinson's Disease (VNS)

2 november 2026 uppdaterad av: Vincent Mok, Chinese University of Hong Kong

Although breakthroughs in the management of Parkinson's disease (PD) have emerged in recent decades resulting in better control in symptoms, majority of patients with PD are still living with various disabling motor and non-motor symptoms despite they are already receiving the best contemporary medical or surgical treatments available to them. There is obviously a need to develop additional treatment modality to further optimize the control of symptoms and/or slow the disease progression for patients having PD.

Vagus nerve stimulation (VNS), a type of noninvasive brain stimulation is believed to modify brain rhythms by modulating the nucleus of the solitary tract and locus coeruleus and other regions known to play a role in gait. Moreover, VNS may modulate inflammatory pathways and reduce oxidative stress, making it a potential disease modifying treatment approach for neurodegenerative diseases linked to neuroinflammation such as PD

Further study is warranted to explore the efficacy of non-invasive VNS for its effects on gait and other symptoms of PD as well as the anti-inflammatory effects.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Detaljerad beskrivning

The objective of the present study is to investigate the feasibility, safety, and potential efficacy of 2 different non-invasive VNS stimulation protocols (conventional and exploratory) for patients with PD. The immediate effects of VNS as well as the medium-term effects of daily VNS at 2 and 4 weeks poststimulation, and the delayed effects of non-invasive VNS at 8 weeks of both stimulation protocols will be investigated. The effects of non-invasive VNS of the 2 different stimulation protocols will also be compared with sham stimulation. The study will be a randomized single blind study. The tested subjects, not the assessor, will be kept unaware of which treatment protocols they are receiving.

The investigator hypothesize the VNS stimulations may provide immediate effects, medium term effects and delayed effects.

Studietyp

Interventionell

Inskrivning (Beräknad)

60

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

40 år till 75 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  1. Idiopathic PD as defined by the UK Parkinson's Disease Society Brain Bank Diagnostic Criteria

  2. Age 40 - 75 years old

  3. Presence of gait impairment as defined by any one of the below:

    a UPDRS Part 2 Item 15 (Walking) with a score of 2 b. UPDRS Part 3 Item 26 (leg Agility) with score of 2 or 3 c. UPDRS Part 3 Item 29 (Gait) with score of 1 or 2

  4. Availability of a caregiver at home

  5. Cantonese speaker

Exclusion Criteria:

  1. Patients with atypical parkinsonism (e.g., multiple system atrophy, progressive supranuclear palsy, dementia with Lewy Bodies)
  2. PD with dementia
  3. PD patients with DBS in-situ
  4. Severe PD with a Hoehn and Yahr staging of 4 or above
  5. Low blood pressure with systolic of < 110 mmHg or with postural hypotension as defined by a decrease in systolic and diastolic blood pressure by 20 mmHg and 10mmHg upon standing, respectively)
  6. Cardiac pacemaker in-situ

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Enda

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Aktiv komparator: conventional VNS

Parkinson Disease
Enhet: cVNS

The cVNS emits a low-voltage 5.56 KHz sinusoidal wave electrical signal bursts lasting 0.9 ms via two flat stimulation contact surfaces. (Figure 2) These bursts repeat once every 38 millisecond (ms). Each set of stimulation will be applied for 2 minutes. Stimulation current can be self-adjusted by the subject. This conventional stimulation waveform was approved by the US FDA for the treatment of migraines.
Aktiv komparator: exploratory VNS
Enhet: eVNS

The eVNS emits the company-proprietary low-voltage of 3~8 KHz sine-variant smooth-transition wave electrical signal bursts lasting near 0.9 ms via two flat stimulation contact surfaces. These bursts repeat once in intervals of approximately 40 ms. A potential benefit of this waveform is that it can produce less unpleasant skin sensations at a given current intensity and this may enhance the subject to tolerate higher current intensity than that of the conventional stimulation.
Sham Comparator: sham VNS
Enhet: sVNS

The sVNS delivers mechanical motor vibrations to provide a similar perceptible stimulation feeling to the skin. No electrical stimulations are delivered. The device that delivers the sham stimulation is identical in appearance, weight, and user interface. A button to adjust "stimulation current" is also available in the sham device so as to allow the subject/caregiver to adjust the "stimulation current"

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change of gait
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Timed UP and Go test: Participant sits back in a standard armchair with their back against the chair and hands resting on the armrests. Regular footwear and usual walking aids (like a cane or walker) are used. On the word "Go", the person stands up, walks a distance of 3 meters (10 feet) to a marked line or cone at a normal, safe pace, turns around, walks back to the chair, and sits down again. A stopwatch starts the moment the word "Go" is spoken and stops the moment the person's buttocks touch the seat. The results in second will be interpret to assist mobility and risk of falling. The longer the time, the high risk of fall
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Severity and progression of Parkinson's disease
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Using Unified Parkinson's Disease Rating Scale to motor and non-motor symptoms. Score from 0 to 4. 0 is normal while 4 is severe/marked impairment
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Quantitative Gait Assessment
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Using an app to track the mobility of participants in a 20 sec walking
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Cognitive status
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Using Hong Kong Montreal Cognitive Assessment to evaluate the cognitive status. score from 0-30. The lower the score, the more cognitive impaired.
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Change in mood
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Using Geriatric depression scale which contain 15 questions. Score from 0-15. The higher the score, the more severe the depressed mood
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change of blood pressure
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Safety measures- record of adverse event and serious adverse event
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

To investigate any possibility and relativity of AE and SAE with the treatment
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Electrocardiogram
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

To investigate any possibility and relativity of the change of ECG with the treatment
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Andra resultatmått

Resultatmått
Tidsram
Blood-based biomarkers
Tidsram: Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits
Baseline, Day 1 stimulation visit, 4 week post-home stimulation visits and 8 week post-home stimulation visits

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Chinese University of Hong Kong

Publikationer och användbara länkar

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Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

20 november 2026

Primärt slutförande (Beräknad)

31 december 2027

Avslutad studie (Beräknad)

30 juni 2028

Studieregistreringsdatum

Först inskickad

22 september 2026

Först inskickad som uppfyllde QC-kriterierna

28 oktober 2026

Första postat (Faktisk)

2 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

3 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

2 november 2026

Senast verifierad

1 november 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 2025.519

Plan för individuella deltagardata (IPD)

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JA

IPD-planbeskrivning

only IPD used in the results publication will be shared

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