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اثر عوامل آگونیست و آنتاگونیست گیرنده های دوپامین بر ترشح بزاق در موش صحرایی | ||
| فصلنامه علمی زیست شناسی جانوری تجربی | ||
| مقاله 2، دوره 6، شماره 3، اسفند 1396، صفحه 27-37 اصل مقاله (598.47 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.30473/eab.2018.6167 | ||
| نویسنده | ||
| فاطمه شهبازی* | ||
| عضو هیات علمی و مدیر گروه زیست شناسی دانشگاه پیام نور استان البرز واحد کرج | ||
| چکیده | ||
| ارتباط دوجانبه بین هسته شکمی میانی هیپوتالاموس و سیستم دوپامینی، ممکن است نقش مهمی در ترشح غدد برون ریز دستگاه گوارشی، رفتارها و عادات تغذیه ای ایجاد نماید. هدف از این مطالعه بررسی نقش گیرنده های دوپامینی در تنظیم غدد برون ریز و آیا ترشح بزاق تحت سیستم عصبی مرکزی است یا فقط در اثر تغییرات سطح گرسنگی، تشنگی و هضم مواد غذایی در دهان صورت می پذیرد؟ 90 سر موش صحرایی تحت بیهوشی عمومی زیر دستگاه استرئوتاکس قرار گرفتند و به 9 گروه: دو گروه کنترل، شم a و b، گروه SCH23390 (آنتاگونیست گیرنده دوپامینی D1) گروه بروموکریپتین (آگونیست گیرنده های دوپامینی D1 و D2)، گروه مخلوط SCH23390 با بروموکریپتین، گروه پیلوکارپین و گروه مخلوط پیلوکارپین و بروموکریپتین تقسیم شدند. میزان ترشح بزاق برحسب حجم (میلی لیتر) اندازه گیری و با کمک برنامه SPSS گروه ها با هم دیگر مقایسه شدند (تست Anova). یافته های مطالعه نشان داد که گروه SCH23390 و گروه مخلوط به طور معنی داری حجم بزاق را افزایش می دهند. بروموکریپتین به تنهایی ترشح پایه بزاق را تغییر نداد. پیلوکارپین ترشح بزاق را افزایش داد و بروموکریپتین در مخلوط با پیلوکارپین بطور معنی داری میزان ترشح بزاق را کاهش داد. SCH23390 بتنهایی و در حضور بروموکریپتین بطور معنی داری ترشح بزاق را افزایش داد. یافته های پژوهش حاضر نشان میدهند که سیستم دوپامینی هسته شکمی میانی هیپوتالاموس روی ترشح بزاق تاثیر بسزایی دارد به صورتی که آگونیست های دوپامین میزان آن را کاهش و آنتاگونیست های دوپامین میزان ترشح بزاق را افزایش میدهند. | ||
| کلیدواژه‌ها | ||
| SCH23390؛ بروموکریپتین؛ هسته شکمی میانی؛ گیرنده دوپامین؛ ترشح بزاق | ||
| عنوان مقاله [English] | ||
| Interaction of the agonist and antagonist of dopamine receptors on the saliva secretion in the rat | ||
| نویسندگان [English] | ||
| Fatemeh Shahbazi | ||
| چکیده [English] | ||
| The bilateral relationship between Ventro Medial Nucleus and dopaminergic system may play an important role in the secretion of the gastrointestinal exocrine glands, nutritional behaviors and habits. The aim of this study was to investigate the role of dopaminergic receptors in regulation of the exocrine glands and to find out whether the change in saliva secretion is the primary effects of central nervous system or there are subsequences of taking food, lick, swallowing and digestion in the mouth. Ninety rats were stereotaxically implanted under urethane anesthesia. The rats were divided into 9 groups: one control group, one fasted control group, two sham groups given surgery and surgery plus medicine solvents, one SCH23390 group, one bromocriptine group, one mixed group: SCH23390 along with bromocriptine, one pilocarpine and a mixed group: bromocriptine along with pilocarpine. In this study, saliva secretion was gathered from submandibular glands by cannulas and measures then volume of secretion by using SPSS program the groups were compared (Test Anova). The saliva secretion was not significantly different between all groups except SCH23390 group, pilocarpine, and both mixed groups which showed significant differences in the saliva secretion. This study showed that SCH23390 (7.5 μg) could increase saliva secretion. Bromocriptine could not affect saliva secretion. Bromocriptine along with pilocarpine significantly decreased saliva secretion. However, this agonist together with SCH23390 significantly increased saliva secretion. So the dopaminergic system of the Ventro Medial Nucleus has a considerable effect on the secretion of the exocrine glands in the digestive system. | ||
| کلیدواژه‌ها [English] | ||
| SCH23390, bromocriptine, Ventro Medial Nucleus, Saliva secretion, Dopamine receptor | ||
| مراجع | ||
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