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  5. 結腸直腸癌非編碼核糖核酸表現之篩選與鑑定
 
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結腸直腸癌非編碼核糖核酸表現之篩選與鑑定

Other Title
Screening and identification of non-coding RNAs in colorectal cancer
Type
thesis
Date Issued
2011-07-21
Author(s)
卓偉智
Advisor
梁有志
Subjects
系所名稱:醫學檢驗暨生物技術學系
Description
學位別:碩士
語文別:中文
指導教授:梁有志
共同指導教授:
口試委員:葉添順;劉俊仁
中文關鍵字:結腸直腸癌;非編碼核糖核酸
Abstract
近來的研究顯示,基因的轉錄(genomic transcripts)比預期的還要複雜,而其中一個新興的轉錄組群被稱為非編碼RNA(non-coding RNA)。不同於編碼RNA (coding RNA),非編碼RNA並不會轉譯成蛋白質。人類的基因體大約只有百分之二點三會轉錄成編碼RNA,顯示大部分的轉錄片段都屬於非編碼RNA。目前為止,大部分被研究的非編碼基因型轉錄為短片段的,如miRNA (microRNA) 或是snoRNA (small nucleolar RNA);但是一些重要的調節性非編碼基因轉錄是長片段。一般而言,長片段非編碼RNA被視為長度超過兩百個核苷酸,並且在哺乳類動物中佔了極大的比例。研究顯示長片段非編碼RNA能夠調控基因轉錄和修飾表面基因遺傳(epigenetic modification)。另外,長片段非編碼RNA最大的族群是非編碼反義型RNA (non-coding antisense RNA),和mRNA互補進而形成雙股RNA,直接影響到mRNA的穩定性。除此之外,許多的證據顯示長片段非編碼RNA和疾病或是癌症形成是息息相關的;其中發現到一些長片段非編碼RNA會參與在癌症轉移過程,而被當作癌症早期的生物標誌,以及越來越多的長片段非編碼RNA被發現在癌症中異常表現。雖然長片段非編碼RNA普遍存在人類細胞中,然而長片段非編碼RNA的作用機制是非常複雜並且尚未深入了解知道的。因此,在本研究中,我們想要建立一個資料庫,找出哪些長片段非編碼RNA與在結腸直腸癌有關。在多種的結腸直腸癌細胞株中,我們找到確實有某些長片段非編碼RNA的存在;並且從結腸直腸癌病人的檢體中,發現到有部分的長片段非編碼RNA比正常組織會有相對高的表現量。我們相信所找到的長片段非編碼RNA,在結腸直腸癌中扮演很重要的角色。
URI
https://203.71.86.71/handle/123456789/13635

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