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  1. Home
  2. .TMU Publications / 北醫出版品(教師升等著作 / 教學實踐 / 學位論文)
  3. .博碩士學位論文
  4. .97學年度
  5. PART 1:Antrodia Camphorate純化物抑制人類直腸腫瘤細胞(COLO 205) 生長及細胞週期G0/G1調控 PART 2:探討LOX(Lysyl Oxidase)在乳癌細胞中所扮演之角色
 
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PART 1:Antrodia Camphorate純化物抑制人類直腸腫瘤細胞(COLO 205) 生長及細胞週期G0/G1調控 PART 2:探討LOX(Lysyl Oxidase)在乳癌細胞中所扮演之角色

Other Title
PART 1:Studies on the Mechanism of SY-1 Induced Apoptosis and G0/G1 Cell Cycle Arrest in Human Colon Adenocarcinoma Cells
PART 2:Studies on the Role of LOX(Lysyl Oxidase) in Breast Cancer
Type
thesis
Date Issued
2009-06-12
Author(s)
林曉薇
Advisor
何元順
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:何元順
共同指導教授:
口試委員:王應然;李宣佑;王朝鐘;謝易修
中文關鍵字:牛樟芝;乳癌;大腸癌
Abstract
PART 1:本篇論文研究來自三種不同牛樟芝(Antrodia camphorate;AC) 的子實體中之純化物4,7- Dimethoxy-5- methyl-l,3- benzodioxole (稱做SY-1)。AC是一種藥用傘菌,主要生長在牛樟樹樹幹腐朽之心材內壁,或枯死倒伏之牛樟樹木材潮濕表面,而且可以利用於中藥上,具有抗腫瘤和免疫調節作用。我們證實SY-1能有效抑制人類直腸腫瘤細胞(COLO 205)的生長,濃度在75-225μM 的SY-1的濃度劑量會使癌細胞之細胞週期停留在G0/G1期,而在SY-1 濃度大於 225μM時,則會誘導細胞產生細胞凋亡(apoptosis)。SY-1調控之COLO 205細胞週期停留在G0/G1期時,p53 、 p21/Cip1及p27/Kip1蛋白的表現會增加,而cyclin D1 、cyclin D3及 cyclin A表現量則減少。相較之下,我們使用人類正常結腸黏膜細胞(FHC),給予SY-1後,並沒有引起顯著的影響細胞週期G0/G1期調控蛋白的表現量改變。將COLO 205細胞培養於軟性瓊膠(soft agar)上,給予SY-1之後觀察群落之生成與型態,發現細胞群落聚集的現象有明顯降低的趨勢。根據以上結果證實,我們首先證實SY-1可以抑制COLO 205細胞的增殖,主要是經由抑制細胞生長和群落的聚集。
PART 2:Lysyl oxidase是一種需銅的氨基氧化酶,位於細胞外基質,會與膠原蛋白和彈力蛋白相互作用。最近研究發現,lysyl oixdase會去氧化細胞外基質內的蛋白,lysyl oixdase對組織生長、細胞增生、細胞內訊息傳遞及細胞轉移是扮演重要的角色。由Real time PCR定量mRNA的表現量,發現lysyl oixdase在乳癌腫瘤病人組織表現量比正常組織較多,大約占62%。更進一步利用雷射顯微擷取Laser Capture Microdissection (LCM)和IHC的方法,確認其再現性及表現分布。另一方面,利用實驗室現有乳癌及正常細胞株中lysyl oixdase的表現,發現在MDA-MB-231細胞株中lysyl oixdase被大量表現。在過去研究發現,lysyl oixdase會與鄰近的lysine結合分泌出過氧化氫,會使FAK/Src pathway被活化,進而使癌細胞移動能力增加。因此使用lysyl oixdase抑制劑(β-aminopropionitrile;βAPN),抑制其活性,發現過氧化氫分泌減少和下游FAK/Src pathway磷酸化也降低。接著利用wound healing assay觀察MDA-MB-231細胞移動能力,由結果得知加入lysyl oixdase抑制劑能有效抑制MDA-MB-231細胞移動能力。因此,我們發現lysyl oixdase在乳癌細胞中大量表現,主要功能是促進細胞移動能力。
URI
https://203.71.86.71/handle/123456789/12956
https://hdl.handle.net/11296/f5wqcv
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C0191294.pdf

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12.97 MB

Format

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Checksum

(MD5):fe336c5124799889c10088c9b580b914

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