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  5. 代謝及DNA修復途徑之基因多型性與肺癌發生風險之關聯性研究
 
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代謝及DNA修復途徑之基因多型性與肺癌發生風險之關聯性研究

Other Title
Association of Genetic Polymorphisms in Metabolism Genes and DNA Repair Pathway Genes with Risk of Lung Cancer in Taiwan
Type
thesis
Date Issued
2013-06-22
Author(s)
陳玟苑
Advisor
陳香吟
Subjects
系所名稱:藥學系(碩博士班)
Description
學位別:碩士
語文別:中文
指導教授:陳香吟
共同指導教授:
口試委員:黃耀斌;方嘉佑;張偉嶠;劉興璟
中文關鍵字:肺癌風險;基因多型性;DNA修復途徑;解毒代謝;分類與迴歸樹
Abstract
背景:肺癌是臺灣癌症死亡率之首要原因。以往的研究顯示基因多型性可能造成疾病感受性之個體間差異。然而,單一基因影響較不足夠,預測價值亦較低。因此,本研究使用分類與迴歸樹 (CART) 模型,探討多基因與肺癌風險可能的關聯性,包括DNA修復途徑基因、代謝解毒路徑基因以及誘導細胞凋亡相關基因。
方法:本研究設計係醫院為基礎之病例對照研究,共納入109位肺癌患者和109位經年齡、性別配對之對照組。將所收集周邊血檢體以ABI 7300 real time PCR儀器進行檢測基因型。以 (i) 多變量邏輯斯迴歸 (multiple logistic regression)、(ii) 基因合併分析及 (iii) 分類與迴歸樹三種方法來分析數據。
結果:本研究所有檢測之單核苷酸多型性 (SNP) 皆符合哈溫平衡。單一基因分析,GSTP1 Ile105Val (代謝解毒路徑基因) 基因變異與增加肺癌風險有關 (OR = 3.03,95% CI = 1.63-5.64,p < 0.01),特別是在抽煙族群 (OR = 6.06,95% CI = 1.86-19.77,p < 0.01);然而,XPD Arg156Arg (DNA修復途徑基因) 則僅於抽菸族群看到其基因變異與降低肺癌風險有關 (OR = 0.21,95% CI = 0.07-0.59,p < 0.01)。此外,NAT2快速型酵素 (rapid acetylator) 與女性肺癌患者有關。合併分析中,針對DNA修復途徑基因,結果顯示危險性對偶基因之個數與肺癌風險有顯著的劑量效應 (p for trend = 0.024)。CART分析中,於抽菸族群可能存在基因交互作用之候選基因為GSTP1 Ile105Val與XPD Arg156Arg,而不抽菸組候選基因為GSTP1 Ile105Val、NAT2及NQO1 Pro187Ser。
結論:本研究主要發現GSTP1 Ile105Val和XPD Arg156Arg可能與抽煙造成的肺癌有關,而帶有NAT2快速型酵素,以及間接推測環境中雜環胺 (heterocyclic amines) 的暴露,可能係臺灣不抽煙女性肺癌危險因子之一。未來仍需要更多研究來驗證與進一步分析探討。
URI
https://203.71.86.71/handle/123456789/14042

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