کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9406355 | 1290112 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Intake inhibition by NPY and CCK-8: A challenge of the notion of NPY as an “Orexigen”
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Intake inhibition by NPY and CCK-8: A challenge of the notion of NPY as an “Orexigen” Intake inhibition by NPY and CCK-8: A challenge of the notion of NPY as an “Orexigen”](/preview/png/9406355.png)
چکیده انگلیسی
We tested the hypothesis that neuropeptide Y (NPY) interacts with cholecystokinin octapeptide (CCK-8) in inhibition of intake of an intraorally infused solution of sucrose, a test of consummatory ingestive behavior. Both intracerebroventricular infusion of NPY (10 μg) and intraperitoneal injection of CCK-8 (0.5 μg/kg) reduced the intake of a 1 M solution of sucrose infused intraorally at a rate of 0.5 ml/min in ovariectomized female rats, but the two peptides did not interact in inhibiting intraoral intake. By contrast, NPY increased intake if the sucrose solution was ingested from a bottle, a test demanding both appetitive and consummatory ingestive responses. CCK-8 inhibited intake in this test and its inhibitory effect was increased by simultaneous treatment with NPY. The activity in the nucleus of the solitary tract (NTS), a brainstem relay mediating inhibition of intake, judged by the expression of c-fos-like immunoreactivity, was significantly increased after treatment with CCK-8 or NPY to approximately the same extent. Combined treatment with NPY and CCK-8 did not increase the c-fos-like immunoreactivity in the NTS above treatment with NPY or CCK-8 alone. These results strengthen the hypothesis that NPY, like CCK-8, is an inhibitor of consummatory ingestive behavior and suggest that this inhibition is mediated via the NTS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Behavioural Brain Research - Volume 161, Issue 1, 3 June 2005, Pages 82-87
Journal: Behavioural Brain Research - Volume 161, Issue 1, 3 June 2005, Pages 82-87
نویسندگان
A.A. Ammar, R. NergÃ¥rdh, B.B. Fredholm, U. Brodin, P. Södersten,