Working…
COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC: https://www.coronavirus.gov.

Get the latest research information from NIH: https://www.nih.gov/coronavirus.
ClinicalTrials.gov
ClinicalTrials.gov Menu

Cognitive Dysfunction In Parkinson's (KL2)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02468804
Recruitment Status : Active, not recruiting
First Posted : June 11, 2015
Last Update Posted : July 10, 2019
Sponsor:
Information provided by (Responsible Party):
University of Colorado, Denver

Brief Summary:
We hypothesize that reductions in gamma activity are a key mechanism underlying cognitive dysfunction in PD and that interventions to increase gamma activity will improve cognition.

Condition or disease Intervention/treatment Phase
Parkinson's Device: rTMS Device: Sham TMS Not Applicable

Detailed Description:

Parkinson's disease (PD) is the second most common neurodegenerative illness (after Alzheimer's disease) affecting 1-2% of people over age 65.3 Although PD is traditionally characterized by its motor symptoms (e.g. tremor, stiffness, slowness), research demonstrates that cognitive dysfunction has a greater impact on patient suffering and caregiver burden despite being under-recognized. Cognitive dysfunction is a significant risk factor for psychosis, dementia, nursing home placement and affects 20- 40% of PD patients even at the time of initial diagnosis.4,5 In patients with PD surviving 20 years or longer, cognitive dysfunction is the leading cause of nursing home placement and three fourths of PD patients ultimately develop dementia.6

We know that neurons in the brain communicate with each other by firing at certain frequencies. A growing literature shows that high frequency (30-50 Hz) brain activity called gamma activity is particularly important for communication between distant brain areas and is critical to normal cognition.7 Prior studies also show that gamma activity is reduced in PD.8 However, we do not know why gamma activity is reduced in PD or the relationship between changes in gamma activity and cognitive dysfunction. We hypothesize that reductions in gamma activity are a key mechanism underlying cognitive dysfunction in PD and that interventions to increase gamma activity will improve cognition.

To test this hypothesis we propose to use a novel combination of research methods including magnetoencephalography (MEG) and repetitive transcranial magnetic stimulation (rTMS). MEG measures magnetic activity over the scalp to determine brain activity. We will use MEG to determine whether reductions in gamma activity are related to cognitive dysfunction in PD. TMS uses a magnetic coil placed over the scalp to stimulate brain activity. While there is evidence that repetitive TMS (transcranial magnetic stimulation) increases gamma activity and may improve cognition, it has not been studied for this purpose in PD. We will apply repetitive TMS to PD patients to determine whether gamma activity and/or cognitive function may be improved non-invasively.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 120 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Basic Science
Official Title: Cognitive Dysfunction in Parkinson's Disease
Study Start Date : August 2013
Actual Primary Completion Date : November 2016
Estimated Study Completion Date : December 2020

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Parkinson's Disease Subjects
The PD subjects will be randomized, and on a separate day receive a course of either real (rTMS) or sham TMS. Twenty minutes after this treatment subjects will again perform the same working memory task (at 9am to control for fatigue and diurnal effects) while having MEG data recorded
Device: rTMS
TMS: Repetitive TMS will be administered using a 70-mm diameter air-cooled figure-of-8 coil and SuperRapid2 Stimulator (Magstim, Jali Medical US distributors, Woburn, MA). Repetitive pulses will be delivered to the right and left pre-frontal cortex (Brodman area 46) using a frameless stereotactic navigation system and the subject's MRI in Brainsight software. Stimuli will be delivered at 20 Hz at 90% of the subjects resting motor threshold (rMT) for 25 trains of 30 pulses per train, inter-train interval of 30 seconds for a total of 750 pulses per hemisphere. The same TMS parameters as active stimulation but with the coil held at 90° to the scalp to induce similar somatic sensations and noise as in the active group with minimal direct brain effects.
Other Name: Repetitive Transcranial Magnetic Stimulation

Device: Sham TMS
Sham TMS will be administered with a Magstim sham coil with electrodes attached to mimic the sounds and sensation of real TMS. The site and frequency of stimulation will be identical to the real TMS described above.

Experimental: Control Subjects
The control subjects will be randomized, and on a separate day receive a course of either real (rTMS) or sham TMS. Twenty minutes after this treatment subjects will again perform the same working memory task (at 9am to control for fatigue and diurnal effects) while having MEG data recorded
Device: rTMS
TMS: Repetitive TMS will be administered using a 70-mm diameter air-cooled figure-of-8 coil and SuperRapid2 Stimulator (Magstim, Jali Medical US distributors, Woburn, MA). Repetitive pulses will be delivered to the right and left pre-frontal cortex (Brodman area 46) using a frameless stereotactic navigation system and the subject's MRI in Brainsight software. Stimuli will be delivered at 20 Hz at 90% of the subjects resting motor threshold (rMT) for 25 trains of 30 pulses per train, inter-train interval of 30 seconds for a total of 750 pulses per hemisphere. The same TMS parameters as active stimulation but with the coil held at 90° to the scalp to induce similar somatic sensations and noise as in the active group with minimal direct brain effects.
Other Name: Repetitive Transcranial Magnetic Stimulation

Device: Sham TMS
Sham TMS will be administered with a Magstim sham coil with electrodes attached to mimic the sounds and sensation of real TMS. The site and frequency of stimulation will be identical to the real TMS described above.




Primary Outcome Measures :
  1. Performance on working memory task (N-back task) [ Time Frame: Change immediately after a single session TMS (pre will be done 1 week prior) ]
    The primary cognitive outcome will be error rates on the 3-back task. Accuracy and reaction time data will also be collected and separated by condition (Target vs. Non-target), N-back level (0-3), group (PD vs. HC), time (pre and post TMS) and treatment (real vs. sham TMS for secondary analyses.



Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Layout table for eligibility information
Ages Eligible for Study:   45 Years to 90 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • We will recruit 60 PD patients through the University Colorado Hospital (UCH) Movement Disorders Clinic diagnosed with probable PD using United Kingdom (UK) Brain Bank Criteria.
  • PD patients will be of mild to moderate severity based on the Hohn and Yahr scale (score of 3 or less in on medication state) and be on a stable dose of PD medications.
  • Clinical severity will also be assessed using the Unified Parkinson Disease Rating Scale.
  • We do not anticipate recruitment to be difficult as UCH Movement clinics see over 800 PD patients annually, the majority of whom are stage 3 or less.
  • Controls will be approximately matched for age and gender as a group and recruited through clinic (spouses) and advertisements in the community.

Exclusion Criteria:

  • Subjects will be excluded if they have significant depression (Beck Depression Inventory33 > 14)
  • Dementia (Mini Mental State Examination34 < 26 or Frontal Assessment Battery35 < 14)
  • Other neurological or psychiatric illness
  • Significant history of head injury, significant systemic medical diseases (e.g. liver failure, kidney failure, poorly controlled diabetes)
  • Deep Brain Stimulation (DBS)
  • Cognitive enhancing medications (e.g. stimulants or acetylcholinesterase inhibitors) or contraindications to either TMS or MRI (pregnancy, pacemaker, unstable cardiac disease, skull lesion, claustrophobia, history of epilepsy or on medications known to lower seizure threshold).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02468804


Locations
Layout table for location information
United States, Colorado
UC Denver Building 534
Aurora, Colorado, United States, 80045
Sponsors and Collaborators
University of Colorado, Denver
Investigators
Layout table for investigator information
Principal Investigator: Benzi Kluger, MD University of Colorado, Denver
Layout table for additonal information
Responsible Party: University of Colorado, Denver
ClinicalTrials.gov Identifier: NCT02468804    
Other Study ID Numbers: 10-0771
First Posted: June 11, 2015    Key Record Dates
Last Update Posted: July 10, 2019
Last Verified: July 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Plan Description: In Progress
Keywords provided by University of Colorado, Denver:
Parkinson's
Non-parkinsons
Additional relevant MeSH terms:
Layout table for MeSH terms
Parkinson Disease
Cognitive Dysfunction
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases
Cognition Disorders
Neurocognitive Disorders
Mental Disorders