کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5843284 | 1126958 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced cognitive performance of dopamine D3 receptor “knock-out” mice in the step-through passive-avoidance test: Assessing the role of the endocannabinoid/endovanilloid systems
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
داروشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Increasing evidence suggests a pivotal role of the D3 receptor (D3R) in cognitive processes and the involvement of endocannabinoid/endovanilloid signaling in the pathophysiology of neurodegenerative disorders such as Alzheimer's disease. This study was undertaken to investigate both the basal and β-amyloid peptide 1-42 (BAP 1-42)-impaired cognitive performance of D3R(â/â) mice, and the role therein of endocannabinoids/endovanilloids. D3R(â/â) mice were either untreated or injected i.c.v. with 400 pMol BAP 1-42 or vehicle to be tested 14 days later in a step-through passive-avoidance paradigm. The CB1 receptor antagonist, rimonabant (1 mg/kg), or the transient receptor potential vanilloid-type 1 channel (TRPV1) antagonist SB366791, were injected intraperitoneally for 11 or 7 days. The retention test was performed 1, 7 and 14 days after the learning trial. Wild-type (WT) mice were subjected to the same procedures. D3R(â/â) mice exhibited a better basal cognitive performance as compared to WT mice (p < 0.001), which was reversed by TRPV1 antagonism. BAP 1-42 induced a pronounced worsening of the passive-avoidance response in all tests and in both genotypes (p < 0.001). Rimonabant treatment never affected the cognitive performance of healthy mice, but fully counteracted BAP 1-42-induced amnesic effects in both D3R(â/â) and WT mice only when administered for 11 days, whereas, when administered for 7 days, only transiently affected WT mice and caused more prolonged cognitive ameliorations in D3R(â/â) mice. These results support the involvement of D3R and TRPV1 in cognitive processes and the concept that Aβ peptides inhibit memory retention in mice through the involvement of endocannabinoids.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pharmacological Research - Volume 61, Issue 6, June 2010, Pages 531-536
Journal: Pharmacological Research - Volume 61, Issue 6, June 2010, Pages 531-536
نویسندگان
Vincenzo Micale, Luigia Cristino, Alessandra Tamburella, Stefania Petrosino, Gian Marco Leggio, Vincenzo Di Marzo, Filippo Drago,