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  5. 甘草酸胺、醋磺內酯鉀及蔗糖對正常及以高脂飲食誘導C57BL/6 小鼠肥胖其體重、脂肪組織、葡萄糖恆定及腸道菌相的影響
 
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甘草酸胺、醋磺內酯鉀及蔗糖對正常及以高脂飲食誘導C57BL/6 小鼠肥胖其體重、脂肪組織、葡萄糖恆定及腸道菌相的影響

Other Title
Effects of monoammonium glycyrrhizinate, acesulfame-potassium and sucrose on body weight, adiposity, glucose homeostasis and gut microbiota in normal and high fat diet-induced obese C57BL/6 mice
Type
thesis
Date Issued
2022-07-12
Author(s)
黃郁慈
Advisor
陳玉華
Subjects
系所名稱:保健營養學系碩士班
Publisher
保健營養學系碩士班
Description
口試委員:陳玉華 CHEN, YUE-HWA;趙振瑞 CHAO, JANE CHEN-JUI;陳雅琳 CHEN, YA-LING
網際網路,開放日期為2022-07-21
Abstract
非營養性甜味劑 (non- nutritive sweeteners, NNS)為熱量極低的甜味劑,但甜度一般較蔗糖高,因此被健康人及肥胖者廣泛使用於控制體重及血糖。本次研究目的為探討不同NNS與蔗糖相比對於正常及以高脂飲食誘導小鼠肥胖之影響。小鼠分為給予AIN-93M飲食之健康組與60%高脂飲食 (high fat diet, HFD),餵予八週誘導之肥胖,於介入前先進行急性暴露 (acute exposure)接著分別於健康組給予水、低高劑量的甘草酸胺 (monoammonium glycyrrhizinate, MAG),HFD組以等甜度的劑量給予蔗糖、低劑量的MAG、醋磺內酯鉀 (acesulfame-potassium, ACE-K)與水,介入八週後收集糞便,接著進行口服葡萄糖耐受試驗 (oral glucose tolerance test, OGTT)犧牲取其血液及器官組織做分析。結果顯示,高劑量的MAG可降低健康小鼠的體重、脂肪組織重量、肝臟中脂肪堆積,並改善血脂及增加肌肉的相對重量與腓腸肌合成指標MyoG的mRNA表現量,但短時間或長期給予MAG後,不影響其OGTT之血糖的曲線下面積,且腸道菌相Firmicutes/Bacteroidetes (F/B)比例及脂肪合成與分解之mRNA表現量無顯著差異; HFD誘導肥胖後,蔗糖體重顯著增加,而蔗糖、MAG及ACE-K相比,脂肪組織含量、F/B比例無顯著差異,但MAG及ACE-K的曲線下面積顯著高於給予水的組別,此外,MAG的F/B比例顯著低於ACE-K。表示高劑量的MAG對於正常小鼠具有抗肥胖的作用,然而對於肥胖小鼠,蔗糖具有增加體重的風險,MAG及ACE-K與蔗糖相比,其體重、血糖及脂肪組織則無正面影響,而MAG的腸道菌相F/B比例低於ACE-K,表示MAG增加肥胖的風險較低,對於肥胖者來說MAG相較於蔗糖及ACE-K是比較好的選擇。
關鍵字:肥胖、non-nutritive sweeteners、monoammonium glycyrrhizinate、acesulfame-potassium
URI
https://handle.ncl.edu.tw/11296/5jw76a
https://203.71.86.71/handle/123456789/10775

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