Amyotrophic lateral sclerosis (ALS) is a progressive uniformly lethal neurodegenerative disorder for which there is no known effective therapy. Risk factors for the development of ALS and determinants of age of onset and disease severity are largely unknown. In addition, there are currently no reliable biological markers of disease progression in ALS. Recent genetic and biochemical studies implicate free radical toxicity as a possible cause of familial ALS and by implication sporadic ALS. The applicants long term objectives are to gain insights into th underlying disease pathogenesis in ALS and to determine whether free radical-mediated toxicity has a significant role in the pathogenesis in ALS. The proposed study will (1) determine risk factors and potential biological markers for ALS and disease severity and (2) determine whether therapeutic intervention with the anti-oxidant, Procysteine, will slow disease progression in patients with ALS. To achieve these goals the applicant will identify specific clinical features and molecular abnormalities which influence age of onset and disease severity in a retrospective cohort study of patients with familial or sporadic ALS(more than 600 patients). Subsequently, the applicant will follow 75 patients with familial or sporadic ALS in a two year prospective cohort study to quantify the natural rate of disease progression and define clinical characteristics, molecular abnormalities, and laboratory-based biological markers of free radical mediated oxidative damage which influence disease severity. The applicant will also determine the pharmacokinetic and pharmacodynamics properties of the anti-oxidant, Procysteine in a phase 1 study in 20 subjects with ALS. This will be followed by a phase II double-blind efficacy trial of Procysteine compared with the anti-glutamate agent Riluzole in 80 subjects with ALS. The study will be designed to determine whether Procysteine treatment slows the progressive deterioration of motor and pulmonary function in patients with ALS and also to assess the effects of this experimental therapy on endogenous antioxidant levels and free radical stress as measured in the cerebrospinal fluid (CSF), blood and urine.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Clinical Investigator Award (CIA) (K08)
Project #
5K08NS001896-03
Application #
2702942
Study Section
NST-2 Subcommittee (NST)
Program Officer
Kerza-Kwiatecki, a P
Project Start
1996-08-10
Project End
2001-04-30
Budget Start
1998-05-01
Budget End
1999-04-30
Support Year
3
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Massachusetts General Hospital
Department
Type
DUNS #
City
Boston
State
MA
Country
United States
Zip Code
02199
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Ellis, T; Cudkowicz, M E; Sexton, P M et al. (2000) Clozapine and risperidone treatment of psychosis in Parkinson's disease. J Neuropsychiatry Clin Neurosci 12:364-9
Rosas, H D; Koroshetz, W J; Jenkins, B G et al. (1999) Riluzole therapy in Huntington's disease (HD). Mov Disord 14:326-30
Cudkowicz, M E; Sexton, P M; Ellis, T et al. (1999) The pharmacokinetics and pharmaco-dynamics of Procysteine in amyotrophic lateral sclerosis. Neurology 52:1492-4