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The Stanford Parkinson's Disease Plasma Study (SPDP)

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ClinicalTrials.gov Identifier: NCT02968433
Recruitment Status : Completed
First Posted : November 18, 2016
Results First Posted : December 30, 2020
Last Update Posted : December 30, 2020
Information provided by (Responsible Party):
Helen M. Bronte-Stewart, Stanford University

Brief Summary:
The purpose of this study is to demonstrate that young plasma infusions can be performed safely in patients with Parkinson's Disease (PD). Secondary outcomes will include behavioral and laboratory data that will support the next study that will inquire whether young plasma infusions improve or slow the progression of cognitive, mood and/or motor impairment and rate markers of the disease.

Condition or disease Intervention/treatment Phase
Parkinson Disease(PD) Drug: Infusions of young plasma Phase 1

Detailed Description:

Parkinson's disease (PD) is a neurodegenerative disease that affects over 1.6 million people in the United States and whose incidence increases with age, affecting over 1% of people over the age of 65. The neuropathological processes involved in PD are widespread throughout the brain, and are reflected in a constellation of motor, cognitive, mood and other non-motor symptoms. Treatments to date have largely focused on dopamine replacement strategies or deep brain stimulation, both symptomatic treatments.

As neurodegenerative diseases progress, there are major changes throughout the body and brain. These changes are transmitted in the body via the circulatory system between organs, tissues and cells. Recent findings from multiple laboratories have shown that infusions of young plasma into aging rodents can have beneficial effects on cognitive functions. This suggests that the circulating components of plasma can improve cognitive and disease-relevant symptoms. This has motivated the field to treat multiple disorders with blood products and their constituent active components.

The established safety of blood transfusions allows the investigators to test whether infusions of young plasma can ease the neurological symptoms in human subjects with neurodegenerative diseases. A related study of plasma infusions has already been completed at Stanford in patients with Alzheimer's disease (ClinicalTrials.gov identifier NCT02256306).

The investigator proposes to test the safety and efficacy of transfusing young plasma into PD participants, in order to establish its effects on motor and cognitive functions in participants in a Phase 1 study. The successful completion of this study will inform the design of future, larger and multicenter studies with the goal to determine whether infusions of young plasma can ameliorate the neurodegenerative symptoms and underlying pathophysiology in Parkinson's disease.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 16 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: The Stanford Parkinson's Disease Plasma (SPDP) Study: Intravenously-Administered Plasma From Young Donors for Treatment of Moderate Parkinson's Disease
Actual Study Start Date : November 2016
Actual Primary Completion Date : December 2019
Actual Study Completion Date : December 2019

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Infusions of Young Plasma

All participants will undergo neuropsychological, neuropsychiatric, and kinematic assessments prior to receiving infusions of young plasma as the treatment.

Participants will receive 1 unit of young plasma, twice a week over a four week duration.

After the four weeks of plasma infusions, participants will undergo neuropsychological, neuropsychiatric and kinematic reassessments. No deception will be used.

Drug: Infusions of young plasma
Participants will receive four twice- weekly infusions of 1 unit young plasma (male, ages between 18-25)

Primary Outcome Measures :
  1. Number of Related and Unrelated Adverse Events [ Time Frame: 8 weeks ]
    The primary outcome measure is the number of adverse events across all participants that might be related to young plasma infusions as a novel treatment to Parkinson's Disease symptoms. Adverse events were categorized as probably, possibly, or not related to the study intervention.

Other Outcome Measures:
  1. Change in Quantitative Data of Cognitive Ability (Neuropsychological Battery) [ Time Frame: 8 weeks ]

    Change in quantitative data of cognitive ability. Raw scores and normative scores were calculated for all measures according to standardized procedures across all 3 time points.

    The cognitive test battery included:

    • Trail Making Test Part A (0-92; lower scores indicate better performance) and B (0-300; lower scores indicate better performance)
    • Digit Symbol Modalities Test (Oral: 0-110 and Written: 0-110; higher scores indicate better performance)
    • Animal Naming Test (0-no maximum; higher scores indicate better performance)
    • Controlled Oral Word Association Test (COWAT) (0-no maximum; higher score indicates better performance)
    • CogStateTM Groton Maze Learning Test (GML) (minimum score is 0; lower scores indicate better performance)
    • Wechsler Abbreviated Scale of Intelligence-II (WASI-II) Block Design (0-71; higher scores indicate better performance) and Matrix Reasoning (0-30; higher scores indicate better performance)

  2. Change in Quality of Life [ Time Frame: 8 weeks ]
    Quality of life (QOL) changes were tracked using the self-report Parkinson's Disease Questionnaire-39 (PDQ-39). The PDQ-39 includes 8 sub-scales: Mobility (raw score range 0-40), Activities of Daily Living (raw score range 0-24), Emotional Well-Being (raw score range 0-24), Stigma (raw score range 0-16), Social Support (raw score range 0-12), Cognition (raw score range 0-16), Communication (raw score range 0-12), and Bodily Discomfort (raw score range 0-12). Subscales scores are totaled then converted to a percentage to calculate the Total score (0 to 100, higher scores indicating the more problems). Ratings are based on participant experiences over the course of the prior month. Lower scores represent better quality of life for all scores.

  3. Change in Quantitative Data of Motor Movements up to 8 Weeks [ Time Frame: 8 weeks ]

    The second outcome measure is the change in the quantitative data of current motor movement ability.

    Patients completed a repetitive Wrist Flexion Extension (rWFE) task with both hands, off therapy at the baseline, immediate-post, and delayed-post visits. Patients were instructed to flex and extend their hands at the wrist as quickly as possible after a "Go" command was given and to stop when instructed. This movement was self-paced, lasted 30 seconds, and was measured using wearable sensors attached to the dorsum of each hand (Motus Bioengineering, Inc.). Variables of interest included the mean angular velocity (Vrms), the variability of mean angular velocity, (CV Vrms), and rhythmicity, defined as the regularity of the interstrike interval (CV ISI). MA = more affected; LA = less affected.

Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • A diagnosis of clinically probable or established Parkinson's Disease (MDS criteria)
  • Subject must be on a stable dose of dopaminergic medication and/or Deep Brain Stimulation (DBS) parameters for at least 4 weeks prior to screening and for the duration of the study
  • Subject must be competent to sign consent
  • Subject must be willing to commit to being available for testing and infusions for 6 consecutive weeks (2 testing consecutive weeks, 4 infusion consecutive weeks) followed by two visits a month after final infusion.
  • The availability of a study partner who knows the patient well and is willing to accompany the subject to all trial (optional if participant is able to consent and travel by self)

Exclusion Criteria:

  • The participation in any other interventional clinical trial
  • The inability to travel to Stanford
  • Inability to walk without assistance in the off or on medication state
  • The clinically determined presence of dementia
  • A clinical suspicion/diagnosis of Multiple System Atrophy (MSA), Progressive Supranuclear Palsy (PSP), Lewy Body Dementia (LBD), Essential Tremor (ET)
  • Subject's pregnancy or likelihood of pregnancy within the next 6 months.
  • Subject's positive test results for Hepatitis B, Hepatitis C or HIV at screening
  • Any other condition or situation that the investigator believes may interfere with the safety of the subject or the intent and conduct of the study
  • Subject's medical history of:

Stroke Anaphylaxis Gout- may cause an increase in uric acid Prior adverse reaction to any human blood product Any history of a blood coagulation disorder or hypercoagulability Congestive heart failure Uncontrolled hypertension Renal failure Prior intolerance to intravenous fluids Recent history of uncontrolled atrial fibrillation immunoglobulin A deficiency (by history)

  • Subject's relation to medications or other treatments:
  • Any concurrent use of an anticoagulant therapy. Antiplatelet drugs (e.g., aspirin or clopidogrel) are acceptable.
  • The use of Inosine, which may alter urate levels
  • Initiation or change in the dosage of a cholinesterase inhibitor or memantine during the trial. A participant already on a cholinesterase inhibitor or memantine must be on a stable dose for at least one month prior to Screening.
  • Concurrent participation in another interventional treatment trial for Parkinson's disease. If there was prior participation, the last dose of the investigational agent must have been at least 6 months prior to Screening.
  • Treatment with any human blood product, including intravenous immunoglobulin, during the 6 months prior to Screening or during the trial.
  • Concurrent daily treatment with benzodiazepines, typical or atypical antipsychotics, long-acting opioids, or other medications that, in the investigator's opinion, interfere with cognition. Intermittent treatment with short-acting benzodiazepines or atypical antipsychotics may be permitted, provided that no dose is administered within the 72 hours preceding any cognitive assessment.

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): NCT02968433

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United States, California
Stanford Movement Disorders Clinic
Stanford, California, United States, 94304
Sponsors and Collaborators
Stanford University
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Principal Investigator: Helen Bronte-Stewart, MS, MD Stanford University
  Study Documents (Full-Text)

Documents provided by Helen M. Bronte-Stewart, Stanford University:
Publications of Results:
Other Publications:
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Responsible Party: Helen M. Bronte-Stewart, Primary Investigator, Stanford University
ClinicalTrials.gov Identifier: NCT02968433    
Other Study ID Numbers: IRB 38417
First Posted: November 18, 2016    Key Record Dates
Results First Posted: December 30, 2020
Last Update Posted: December 30, 2020
Last Verified: December 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by Helen M. Bronte-Stewart, Stanford University:
Young Male Plasma
Additional relevant MeSH terms:
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Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases