title: Neuroprotective agents for clinical trials in Parkinson's disease: a systematic assessment.
abstract: BACKGROUND
  Current therapies for PD ameliorate symptoms in the early phases of disease but become less effective over time, as the underlying disease progresses. Therapies that slow the progression of PD are needed. However, there have been relatively few clinical trials aimed at demonstrating neuroprotection. The authors sought to identify potential neuroprotective agents for testing in clinical trials.
  
  
  METHODS
  First a broad array of compounds were identified by working with clinicians and researchers in academics and industry. Specific criteria were drafted for drug evaluation, including scientific rationale, blood-brain barrier penetration, safety and tolerability, and evidence of efficacy in animal models or humans. Agents were prioritized based on these criteria.
  
  
  RESULTS
  The authors identified 59 potential neuroprotective compounds, proposed by 42 clinicians and scientists from 13 countries. After systematic reviews using the specified criteria they found 12 compounds to be attractive candidates for further clinical trials in PD.
  
  
  CONCLUSIONS
  Several potential neuroprotective compounds, representing a wide range of mechanisms, are available and merit further investigation in PD.
authors.affiliation: National Institute of Neurological Disorders and Stroke, National Institutes of Health, Rockville, MD 20892-9257, USA. RavinaB@ninds.nih.gov
authors.forename: B M
authors.initials: BM
authors.lastname: Ravina
authors.forename: S C
authors.initials: SC
authors.lastname: Fagan
authors.forename: R G
authors.initials: RG
authors.lastname: Hart
authors.forename: C A
authors.initials: CA
authors.lastname: Hovinga
authors.forename: D D
authors.initials: DD
authors.lastname: Murphy
authors.forename: T M
authors.initials: TM
authors.lastname: Dawson
authors.forename: J R
authors.initials: JR
authors.lastname: Marler
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards; D004353:Drug Evaluation, Preclinical; D006801:Humans; D018696:Neuroprotective Agents / Q000145:classification / Q000493:pharmacokinetics / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy*
chemical_list: D018696:Neuroprotective Agents