title: Predicting beneficial response to a protein-redistribution diet in fluctuating Parkinson's disease.
abstract: To identify factors that might help in predicting the benefit to be gained from a protein-redistribution diet (PRD) we subjected 26 parkinsonian patients with motor fluctuations refractory to optimal timing and dosage of levodopa plus bromocriptine to a 2,000-2,500 Kcal., 65-80 g/d protein containing diet maintained for 8-12 weeks. Fifteen patients were eligible for evaluation, 10 of whom being benefited by the PRD (79 percent reduction in the mean "off" time in "on-off" charts). When the duration and pattern of the fluctuations were compared in the 10 diet-benefit patients with those in 5 diet-failure patients only dose-failures consistently occurring postprandially were resolved by the PRD. Wearing-off failures responded unpredictably while random "on-off" fluctuations were present only in the diet-failure group. Nocturnal akinesia and peak-dose dyskinesias often worsened. In no patient "on"-time quality was modified by the diet. In addition, the diet-failure group was characterized by a younger mean age at onset (p less than 0.05) and by longer duration in their fluctuations (p less than 0.001). Though requiring confirmation in a larger series, our results suggest that parkinsonian patients showing fluctuations over prolonged periods, particularly those having a pattern of random "on-off" oscillations in motor performance and dose-failures unrelated to meals are unlikely to benefit from a PRD.
authors.affiliation: Department of Neurology, Hospital General Gregorio Marañón, Madrid, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Giménez-Roldán
authors.forename: D
authors.initials: D
authors.lastname: Mateo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003131:Combined Modality Therapy; D015930:Diet Records; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010276:Parasympatholytics / Q000627:therapeutic use; D010300:Parkinson Disease / Q000178:diet therapy* / Q000523:psychology; D011597:Psychomotor Performance
chemical_list: D004044:Dietary Proteins; D010276:Parasympatholytics