Timing of Levodopa Treatment in Parkinson's Disease
|First Received Date ICMJE||February 25, 2000|
|Last Updated Date||June 23, 2005|
|Start Date ICMJE||January 1998|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00004733 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Timing of Levodopa Treatment in Parkinson's Disease|
|Official Title ICMJE||Earlier Versus Later L-Dopa in Parkinson's Disease|
The ELLDOPA study is a controlled clinical trial in patients with newly diagnosed PD to determine the optimal timing and dosing with levodopa (Sinemet or its generic equivalents).
The time to begin levodopa therapy has been controversial for many years, and yet every patient with PD, along with his/her treating doctor, needs to make this decision. One school of thought is that levodopa may lead to developing motor fluctuations and involuntary movements, and therefore its introduction should be delayed. The opposing school of thought argues that it is the worsening severity of the disease over time that makes the patient susceptible to these problems, and argues that the best response to levodopa is in the early stages of the illness when an improved quality of life can be optimized with levodopa.
Another debated issue is whether levodopa offers protection or is harmful to the remaining dopamine neurons. The latest studies in tissue culture show that when glia (the brain's supportive cells) tissue is present in addition to the nerve cells, the glia tissue becomes protective against any levodopa toxicity. Because glia tissue is present in brain, the argument has been made that levodopa should not be toxic in living brain tissue. A few studies have been carried out in animal models of PD. Two of these animal studies suggest levodopa is toxic to neurons, and two show that levodopa is not toxic and may actually have a protective effect. So there is no convincing or consistent evidence that levodopa damages dopamine neurons in humans or animal models of PD.
With this uncertainty as to what levodopa may be doing to the remaining dopamine cells in patients with PD, there is a strong need to make the determination in patients as to whether levodopa protects or worsens the progression of PD.
Primary End Point: Progression of PD as determined by change in a PD rating scale, the UPDRS, between baseline examination and examination at Week 42. These two examinations are conducted by a Primary Rater who sees the subjects only twice: at baseline and at Week 42, so as not to be influenced by any effects the subject may have experienced during the 40 week exposure to investigational medication.
|Study Type ICMJE||Interventional|
|Study Phase||Phase 3|
|Study Design ICMJE||Allocation: Randomized
Primary Purpose: Treatment
|Condition ICMJE||Parkinson's Disease|
|Intervention ICMJE||Drug: levodopa|
|Study Arm (s)||Not Provided|
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Enrollment ICMJE||Not Provided|
|Completion Date||February 2004|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
|Ages||30 Years and older|
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT00004733|
|Other Study ID Numbers ICMJE||R01NS34796|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Neurological Disorders and Stroke (NINDS)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institute of Neurological Disorders and Stroke (NINDS)|
|Verification Date||February 2004|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP