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EMD 128130 for the Treatment of Parkinson's Disease

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: NCT00009048
Recruitment Status : Completed
First Posted : January 24, 2001
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

This study will evaluate the effects of an experimental drug called EMD 128130 on Parkinson's disease symptoms and on dyskinesias (involuntary movements) that develop as a result of long-term treatment with levodopa. EMD 128130 inhibits the function of serotonin, a chemical messenger thought to regulate dopamine release, and thus affect Parkinson's disease symptoms.

Patients with relatively advanced Parkinson's disease between 30 and 80 years of age may be eligible for this 3-phase study.

  • Phase 1 - Baseline Evaluation

Participants will have a medical history, physical examination, detailed neurologic evaluation, routine blood tests, urinalysis and an electrocardiogram. A chest X-ray and MRI or CT scan of the brain will be done if needed. In addition, an ACTH stimulation test will be done before and at the end of the study. For this test, a hormone called ACTH is injected into a vein. A small amount of blood is drawn before the injection and 30 and 60 minutes afterwards to measure levels of another hormone called cortisol. After these tests are completed, patients will, if possible, stop taking all antiparkinsonian medications except levodopa (Sinemet) for one month before the study begins and throughout its duration.

  • Phase 2 - Levodopa and Apomorphine Dose Finding

For 1 to 3 days, patients will be admitted to the NIH Clinical center to undergo a levodopa and apomorphine (a dopamine agonist) "dose-finding" procedure. For this procedure, patients will stop taking Sinemet and instead will have levodopa, and subsequently apomorphine, infused through a vein. During the infusions, the drug dose will be increased slowly until either 1) parkinsonian symptoms improve, 2) unacceptable side effects occur, or 3) the maximum study dose is reached. Symptoms will be monitored frequently to find two infusion rates: 1) one that is less than what is needed to relieve symptoms, and 2) one that relieves symptoms but may produce dyskinesias.

  • Phase 3 - Active Study

Patients will begin the treatment phase within 3 months of the dose-finding phase. After a brief physical examination, routine blood tests, and evaluation of parkinsonism symptoms, patients will begin taking either EMD 128130 tablets or capsules or a placebo (a look-alike pill with no active ingredient) twice a day, along with Sinemet, for 3 weeks. All participants will receive placebo at least 1 week during the study, and about four patients, selected at random, will receive only placebo the entire 3 weeks. Levodopa and apomorphine infusions will be repeated at the end of weeks 1, 2 and 3 of Phase 3. The procedure for the infusions will be the same as in the dose-finding phase.

Throughout the study, parkinsonian symptoms and dyskinesias will be assessed and blood samples will be drawn periodically to measure drug levels. Patients will return for a follow-up evaluation 2 weeks after the end of the study.

Condition or disease Intervention/treatment Phase
Parkinson's Disease Drug: EMD 128130 Drug: IV Levodopa Phase 2

Detailed Description:
The objective of this study is to evaluate the acute effects of a selective agonist of serotonin 5-HT1A receptors on the severity of parkinsonian signs and levodopa-associated motor response complications in patients with moderately advanced Parkinson's disease. In a controlled proof-of-principle clinical trial, the efficacy of EMD 128130 will be assessed through the use of validated motor function scales. Safety will be monitored by means of frequent clinical evaluations and laboratory tests.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 30 participants
Primary Purpose: Treatment
Official Title: Effect of Serotoninergic Treatment in Parkinson's Disease
Study Start Date : January 2001
Study Completion Date : December 2003

Resource links provided by the National Library of Medicine

Drug Information available for: Levodopa

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.

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Males and females between the ages of 30-80.

Females must be either at least one year post-menopausal, or using an adequate contraceptive method for at least one month prior to and during participation in this study.

Patients will carry the diagnosis of idiopathic Parkinson's disease based on the presence of a characteristic clinical history and neurologic findings.

Patients will have relatively advanced disease with levodopa-associated motor response complications, including peak-dose dyskinesias and wearing-off fluctuations.

Patients with the presence or history of any medical condition that can reasonably be expected to subject the patient to unwarranted risk will be excluded.

Patients with clinically significant laboratory abnormalities including liver enzyme elevations more than two times the upper limit of normal will be excluded.

Patients who are unable to be treated with levodopa/carbidopa alone or with a single, relatively short-acting dopamine agonist will be excluded.

Patients with a form of parkinsonism other than idiopathic PD will be excluded.

Patients with unacceptable prior/concomitant medications will be excluded.

No pregnant women. Female and male patients must be practicing effective means of birth control.

Patients with prior bilateral surgical intervention for the treatment of parkinsonian symptoms, i.e. deep brain stimulation, pallidotomy, fetal tissue transplantation will be excluded.

Patients at risk for hypotension, cardiac arrhythmia, and/or myocardial ischemia secondary to intravenous levodopa challenge will not be eligible.

Patients with cognitive impairment (MMSE less than 25) will not be eligible.

Patients with subnormal serum cortisol responses to acute ACTH stimulation will be excluded.

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): NCT00009048

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United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
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ClinicalTrials.gov Identifier: NCT00009048    
Other Study ID Numbers: 010071
First Posted: January 24, 2001    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: December 2003
Keywords provided by National Institutes of Health Clinical Center (CC):
L-Dopa Infusion
Clinical Trial
Motor Function
Parkinson's Disease
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
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs