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題 名 | Adenosine對於大白鼠攝食行為及下丘中神經元活性之影響=Effect of Adenosine on Food Intake and Expression of cFos in the Hypothalamus |
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作 者 | 王慧如; 王雅貞; 劉佳宜; 陳貴米; 楊齊生; | 書刊名 | 弘光學報 |
卷 期 | 33 1999.04[民88.04] |
頁 次 | 頁43-52 |
分類號 | 381.48 |
關鍵詞 | 下視丘; 攝食行為; Adenosine; cFos; Hypothalamus; Food intake; |
語 文 | 中文(Chinese) |
中文摘要 | Adenosine可有效抑制攝食行為,因此本實驗利用 cFoS 為神經元活化指標,尋找 adenosine 在中樞可能的作用位置。將雄性大白鼠食物剝奪 24 小時以刺激其食慾,再以腹 腔注射 (intraperitonealinjection) 及頸靜脈管之方式給予輸注 adenosine,分別觀察攝 食行為之變化和 paraventriculainucleus(PVN) 與 supraopicnucleus(SON) 中的 cFoS 表 現情形。結果顯示 100mg adenosine /kg 能明顯抑制攝食行為,並且在高劑量 (100mg/kg) 顯著的增加 PVN 中 cFoS 之含量 (P<0.01), 但 cFos 在 SON 的表現情形並無顯著的差異 , 在給予大白鼠低劑量 adenosine 10mg/kg 有顯著降低 PVN 中 cFos 含量 (P<0.01),因 此 adenosine 對雄性大白鼠的攝食行為的作用可能和 PVN 中部份神經元的活化有關。 |
英文摘要 | Adenosine exerts an inhibitory effect on food intake via a central mechanism. In the present study, cFos expression was used to investigate possible sites in the hypothalamus that may be involved in the anorexigeniceffect of adenosine. Male rats received intraperitoneal (i.p.) or intravenous (i.v.) injection of adenosine following 24-hr fasting to induce ingestive behavior. In the first experiment, higher dose of adenosine (100 mg/kg body weight, i.p.) consistently reduced food intake in fasted animals. In a subsequent experiment, cFos expression was studied in animals receivingintravenous infusion of adenosine. In the paraventricular nucleus (PVN) of the hypothalamus, there was an increase in cFos immunoreactivity in rats administered with 100 mg/kg adenosine (p<0.01), whereas a decrease in cFos was observed after given 10 mg/kg adenosine (p<0.01). However, cFos expression in the supraoptic nucleus was not different among groups. Therefore, the effect of adenosine on PVN neuronal activation was areaspeci fic, suggesting that PVN may be involved in the inhibitory effect of adenosine on food intake in fasted animals. |
本系統中英文摘要資訊取自各篇刊載內容。