This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Randomized Study of Fetal Neurotransplantation for the Treatment of Parkinson's Disease

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified January 1999 by Office of Rare Diseases (ORD).
Recruitment status was:  Active, not recruiting
University of Colorado, Denver
Information provided by:
Office of Rare Diseases (ORD) Identifier:
First received: February 24, 2000
Last updated: June 23, 2005
Last verified: January 1999


I. Assess the safety and efficacy of embryonic mesencephalic dopamine cell implants into the putamen of patients with Parkinson's disease.

Condition Intervention
Parkinson Disease Procedure: tissue implantation

Study Type: Interventional
Study Design: Allocation: Randomized
Masking: Double-Blind
Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by Office of Rare Diseases (ORD):

Estimated Enrollment: 40
Study Start Date: July 1998
Detailed Description:

PROTOCOL OUTLINE: This is a randomized, double blind, placebo controlled study. Patients are stratified by age (over and under 60). Patients are randomized to receive either sham surgery or tissue implantation.

Embryonic tissue is prepared. While patients are awake, but sedated, bilateral incisions are made in the skin and burr holes drilled in the skull. A cannula is inserted into the brain to the posterior putamen. Implant patients receive embryonic neural tissue or sham patients have no needles penetrate the brain. After 1 year, patients who receive the sham operation in the first operation may receive embryonic neural tissue in a second operation.

Patients are followed every 4 months during the first year and every 6 months thereafter.


Ages Eligible for Study:   40 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


--Disease Characteristics--

  • Idiopathic Parkinson's disease for at least 7 years with rest tremor or bradykinesia and one of the following cardinal signs: Rigidity Flexed posture Loss of postural reflexes Freezing (motor blocks)
  • Continuing response to levodopa
  • Presence of at least one of the following intractable symptoms or signs: Intractable disabling fluctuations Intractable disabling dyskinesias Intractable "on" freezing (i.e., motor blocks that interfere with walking despite being "on"
  • Bilateral parkinsonism when "off" (may be asymmetry between right and left sides)
  • Decreased dopa uptake in the striatum

--Prior/Concurrent Therapy--

  • No prior brain surgery

--Patient Characteristics--

  • Cardiovascular: No severe cardiopulmonary disease
  • Neurologic: No history of strokes No neuroleptics No encephalitis No oculogyric crisis No remission No cerebellar signs No dementia (Mini-Mental state score no greater than 22) No supranuclear gaze palsy No Babinski sign No orthostatic hypotension No hydrocephalus No brain tumor No occlusive cerebrovascular disease
  • Pulmonary: Absolute standing pressure at least 90/60 mmHg
  • Other: No diabetes mellitus No exposure to toxins No other severe medical disease Hamilton Depression Scale score of less than 20 points
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00004844

Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
University of Colorado, Denver
Study Chair: Curt R. Freed University of Colorado, Denver
  More Information Identifier: NCT00004844     History of Changes
Other Study ID Numbers: 199/13940
Study First Received: February 24, 2000
Last Updated: June 23, 2005

Keywords provided by Office of Rare Diseases (ORD):
Parkinson Disease
neurologic and psychiatric disorders
rare disease

Additional relevant MeSH terms:
Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases processed this record on July 19, 2017