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  5. 大豆蛋白對非酒精性脂肪變性肝炎影響機制之探討
 
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大豆蛋白對非酒精性脂肪變性肝炎影響機制之探討

Other Title
Mechanisms of the Beneficial Effects of Soy Protein
on Non-Alcoholic Steatohepatitis
Type
thesis
Date Issued
2008-06-23
Author(s)
邱詩涵
Advisor
陳俊榮
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:陳俊榮
共同指導教授:
口試委員:楊賢馨;趙振瑞
中文關鍵字:非酒精性脂肪變性肝炎;大豆蛋白;胰島素抗性;PPARs;氧化壓力
Abstract
摘要
本研究室先前發現以大豆蛋白取代酪蛋白作為大鼠飼料中50%的蛋白質來源時,可延緩非酒精性脂肪變性肝炎 (non-alcoholic steatohepatitis, NASH) 疾病進程之作用。本研究誘發大鼠NASH後,將實驗組飲食中的蛋白質來源改為大豆蛋白或大豆蛋白胃蛋白酶水解物,以探討大豆蛋白中可改善NASH的功效成分及機制。實驗共進行18週,前12週為誘發飲食期,後6週為實驗飲食期。C組於實驗進行中全程餵食AIN-93M標準飲食,其餘所有動物於誘發飲食期間餵食NASH誘發飲食,實驗飲食期則將分別餵予各組實驗飼料,包括:N 組 (NASH誘發飲食)、NA組(NASH誘發飲食 + 大豆蛋白SPI )、 NS 組 (NASH誘發飲食 + 大豆蛋白水解物水溶性成分SSP)及NP 組 (NASH誘發飲食 + 大豆蛋白水解物非水溶性成分 PSP)。結果顯示,飼料中添加大豆蛋白及大豆蛋白水解物,可顯著降低NASH大鼠口服葡萄糖後血漿葡萄糖濃度、肝臟中總膽固醇、三酸甘油酯及游離脂肪酸濃度,但肝臟中PPAR-α、PPAR-γ蛋白質表現量在各組間並無顯著差異。另一方面,添加大豆蛋白及其水解物的實驗組中,肝臟CYP2E1、CYP4A蛋白質表現、TNF-α及Hydroxyproline濃度皆顯著低於N組。由研究結果推論,大豆蛋白及其水解物皆可在不影響 PPAR-α、PPAR-γ蛋白質表現的路徑下,藉由降低胰島素抗性、減少肝臟脂質堆積並可改善氧化壓力、肝臟發炎情形,進而延緩肝細胞走向纖維化,達到延緩 NASH 疾病進程之作用。
URI
https://203.71.86.71/handle/123456789/12564
https://hdl.handle.net/11296/cm52es
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