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  5. n-6與n-3多元不飽和脂肪酸比例對腸炎小鼠免疫調節之影響
 
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n-6與n-3多元不飽和脂肪酸比例對腸炎小鼠免疫調節之影響

Other Title
Eeffect of the n-6 PUFAs and n-3 PUFAs ratio on immunomodulation in mice with inflammatory bowel disease
Type
thesis
Date Issued
2014-06-16
Author(s)
黃瓊慧
Advisor
葉松鈴
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:葉松鈴
共同指導教授:
口試委員:蔡帛蓉;商惠芳
中文關鍵字:發炎性腸道疾病;n-3 PUFAs;輔助型T細胞;調節型T細胞
Abstract
發炎性腸道疾病為致病機制不明之消化道反覆發炎疾病,其中體內輔助型T細胞(helper T lymphocyte, Th)與調節型T細胞(regulatory T lymphocyte, Treg)失衡為影響腸道發炎的重要因子。n-3多元不飽和脂肪酸(polyunsaturated fatty acids, PUFAs)具免疫調節的功能並可緩解發炎反應。本實驗探討飲食中不同的n-6 / n-3 PUFAs比例,對於腸炎時期的免疫調控與發炎反應間之相關性。動物隨機分為3組非腸炎組(C、LF、HF組)及3組腸炎組(DC、DLF、DHF組),C及DC組餵食一般半純化飲食,其餘組別則持相同飲食但以魚油部分替代大豆油之型式供應;C與DC組飲食中n-6 / n-3 PUFAs = 7 : 1、LF及DLF組飲食中n-6 / n-3 PUFAs = 4 : 1、HF及DHF組飲食中n-6 / n-3 PUFAs = 2 : 1。連續餵食上述飲食2週後,於腸炎組之飲水添加2% Dextran sulfate sodium連續5天,再予以正常飲水5天並於隔日犧牲。結果顯示,非腸炎組間在各分析項目皆無統計差異。血液中Th與Treg次群比率部分,DLF及DHF組顯著較DC組減少Th1、Th2及Th17次群比率,並增加Th22與Treg次群表現;DC組血漿haptoglobin及interleukin (IL)-6濃度、大腸沖洗液中prostaglandin E2、leukotriene B4、immunoglobulin (Ig) A、IgG、monocyte chemoattractant protein-1、tumour necrosis factor (TNF) -α、IL-6與IL-1β濃度皆較C組高,但DLF與DHF組則皆低於DC組。大腸組織mRNA表現量方面,DLF及DHF皆顯著較DC組降低heat shock protein 72、mucin 2、trefoil factor family 3、IL-17A、TNF-α及keratinocyte-derived chemokine。因此,經調整飲食中n-6 / n-3 PUFAs為4 : 1 - 2 : 1,可調控Th與Treg平衡並降低發炎反應,進而減緩疾病嚴重度,且n-6 / n-3 PUFAs為2 : 1較4 : 1的效果佳。
URI
https://203.71.86.71/handle/123456789/56747

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