title: CSF-changes of HVA and 5-HIAA during intermittent and continuous Parkinson therapy with particular regard to prodipin application.
abstract: The influence of prodipin, a putative dopamine releasing compound, on the concentration of homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA) in the spinal liquor of 28 patients with Parkinson's disease was investigated. The patients were divided into three groups. In group 1 the combined antiparkinson therapy was interrupted, and 20 mg prodipin was infused. In group 2 and 3 the therapy was continued, while an additional 20 mg of prodipin was administered by infusion only to group 3. 4 Liquor-samples were obtained from each patient: 1 basic value and three additional samples 5, 8 and 24 hours after administration of 2 g probenecid. The base concentration of HVA was 15 ng/ml and this was not increased by probenecid in group 1; the concentration of 5-HIAA was 11.6 ng/ml and this was doubled by probenecid to 22.9 ng/ml. The HVA concentration increased to a maximum of 28.9 ng/ml during continued therapy (group 2); the elevated 5-HIAA remained unchanged. Prodipin does not cause an alteration in metabolite concentration in cases of interrupted therapy (group 1), but leads, in the case of continued therapy, to a 1.8-fold increase in HVA, and a 1.6-fold increase in 5-HIAA (group 3).
mesh_terms: D000368:Aged; D000978:Antiparkinson Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D005260:Female; D006719:Homovanillic Acid / Q000134:cerebrospinal fluid*; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000134:cerebrospinal fluid*; D008297:Male; D008875:Middle Aged; D010302:Parkinson Disease, Secondary / Q000134:cerebrospinal fluid / Q000188:drug therapy*; D010648:Phenylacetates / Q000134:cerebrospinal fluid*; D010880:Piperidines / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D000978:Antiparkinson Agents; D010648:Phenylacetates; D010880:Piperidines; C016695:prodipin; D006897:Hydroxyindoleacetic Acid; D006719:Homovanillic Acid