We have located links that may give you full text access.
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Rasagiline enhances L-DOPA-induced contralateral turning in the unilateral 6-hydroxydopamine-lesioned guinea-pig.
Neuropharmacology 2004 July
The modification of L-3,4-dihydrooxyphenylalanine- (L-DOPA-) induced turning response by the new selective monoamine oxidase type B (MAO-B) inhibitor rasagiline was studied in guinea-pigs bearing a unilateral 6-hydroxydopamine-induced lesion in the substantia nigra. In an initial experiment, it was established that contralateral turning is induced in lesioned guinea-pigs in response to apomorphine (18 mg/kg i.p.) and L-DOPA/carbidopa (15/3.5 mg/kg i.p.), while ipsilateral turning is induced by S(+)-methamphetamine (7 mg/kg i.p.). The effect of rasagiline was studied in a chronic treatment regimen, in which animals were treated with rasagiline (0.05 mg/kg s.c.) or saline s.c. daily commencing 2 weeks after lesioning, and L-DOPA/carbidopa (4:1 mg/kg) was administered once daily for 21 days. Only guinea-pigs with 95% or more depletion of striatal dopamine were included in this study. Guinea-pigs treated with rasagiline had a significantly increased intensity and duration of turning in response to L-DOPA (P <0.05 by repeated measures ANOVA) over the 21-day period. On day 21, turning averaged 806+/-105 (n=10) vs 442+/-123 (n=11) turns per 180 min for rasagiline and vehicle treated animals, respectively (P <0.05); turning duration half-time averaged 81+/-15.4 (n=10) as opposed to 33+/-7.6 (n=11) min for rasagiline and vehicle treatments (P <0.01). Concentration of dopamine in intact striatum was significantly increased (69.3+/-2.1 and 60.3+/-2.4 pmol/mg tissue for rasagiline and vehicle, P <0.05) and levels of dihydroxyphenylacetic acid and homovanillic acid were decreased by the rasagiline treatment. Activity of brain MAO-B was 8.6+/-2.9% and MAO-A was 71+/-1.5% that of control in rasagiline-treated animals. Chronic, selective inhibition of MAO-B by rasagiline potentiated L-DOPA-induced turning in this rodent model.
Full text links
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app