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  3. .博碩士學位論文
  4. 102學年度
  5. 介入富含n-3多元不飽和脂肪酸之油脂對大鼠非酒精性脂肪肝疾病與粒線體功能之影響
 
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介入富含n-3多元不飽和脂肪酸之油脂對大鼠非酒精性脂肪肝疾病與粒線體功能之影響

Other Title
Effects of oils rich in n-3 polyunsaturated fatty acids on non-alcoholic fatty liver disease and mitochondrial function in rats
Type
thesis
Date Issued
2014-06-23
Author(s)
蔡偉恩
Advisor
謝榮鴻
Subjects
系所名稱:保健營養學研究所
Description
學位別:碩士
語文別:中文
指導教授:謝榮鴻
共同指導教授:
口試委員:謝秀梅;葉添順
中文關鍵字:非酒精性脂肪肝疾病;粒線體;磷蝦油;魚油;亞麻籽油
Abstract
非酒精性脂肪肝疾病為非過量攝取酒精或非特殊原因造成脂肪堆積於肝臟,其主要成因之一為不當日常飲食習慣,當飲食中過多脂肪被攝入時,因送入肝臟三酸甘油酯過多,過度增加肝臟粒線體β氧化產生活性氧屬,攻擊肝臟細胞,使脂肪酸氧化降低;且極低密度脂蛋白無法有效將三酸甘油酯運送出肝臟,使其堆積於肝臟內,最終造成非酒精性脂肪肝疾病。n-3多元不飽和脂肪酸為碳基端算起第3個碳含雙鍵之不飽和脂肪酸,其功能為穩定細胞膜、訊號傳遞及能量儲備等。過去針對n-3 多元不飽和脂肪酸研究發現,其可改善血脂組成、胰島素抗性、調節脂質代謝基因並降低發炎反應等功效。常見之n-3 多元不飽和脂肪酸為α-次亞麻油酸、二十碳五烯酸以及二十二碳六烯酸,本次實驗之油脂使用為磷蝦油、魚油及亞麻籽油;而磷蝦油與魚油富含二十碳五烯酸及二十二碳六烯酸,亞麻籽油則富含α-次亞麻油酸。
實驗目的為探討磷蝦油、魚油、亞麻籽油等富含n-3 多元不飽和脂肪酸油脂介入以45 %高脂飲食誘發非酒精性脂肪肝疾病之Sprague-Dawley (SD)大鼠,對其血脂、肝臟脂肪、脂肪酸生成酵素活性、抗氧化酵素活性及粒線體功能之影響。實驗共分8組:控制組-C,高脂組-HF,磷蝦油一、三倍劑量組-KO1、3,魚油一、三倍劑量組-FO1、3,亞麻籽油一、三倍劑量組-LO1、3。除C組外,其餘組別皆給予高脂飲食;除C、HF組外,其餘組別介入不同種類及劑量之油品;而一倍、三倍劑量組別分別將其n-3總量固定為每天每克飼料4.2及13.0 毫克。12週後犧牲,取其血液及肝臟樣本進行後續分析。其結果入下, FO及LO組於血漿三酸甘油酯濃度顯著低於HF組;而胰島素抗性部分則HF、KO3、FO3顯著高於C組。KO1、FO1及LO組於肝臟三酸甘油酯濃度與病理切片有顯著改善。脂肪酸生成酵素活性為KO3及FO3組顯著高於C組。抗氧化酵素、粒線體呼吸鏈複合體酵素活性及粒線體生合成則為KO1、FO1及LO組顯著高於HF組。
以45 %高脂飲食成功誘發大鼠非酒精性脂肪肝疾病模式下,同時額外添加富含n-3多元不飽和脂肪酸油脂磷蝦油每天每公斤體重273.4毫克、魚油每天每公斤體重149.6毫克、亞麻籽油每天每公斤體重147.0與466.5毫克,其可降低血脂、肝臟脂肪與脂肪酸生成酵素活性,提升肝臟抗氧化能力與粒線體功能,達到延緩或預防非酒精性脂肪肝疾病之進展。
URI
https://203.71.86.71/handle/123456789/56752

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