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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 羅翊禎 | |
dc.contributor.author | Chih-Chuan Chang | en |
dc.contributor.author | 張志銓 | zh_TW |
dc.date.accessioned | 2021-06-16T16:11:57Z | - |
dc.date.available | 2015-03-15 | |
dc.date.copyright | 2013-03-15 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-02-18 | |
dc.identifier.citation | Acharya, S., Wilson, T., Gradia, S., Kane, M.F., Guerrette, S., Marsischky, G.T.,
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/62836 | - |
dc.description.abstract | 塑化劑是種廣泛用於工業用途上的化合物,常被使用添加於塑膠製品中,而使用最普遍的則是一群稱為鄰苯二甲酸酯類的化合物。目前已知鄰苯二甲酸酯類是種環境賀爾蒙,會造成類似雌激素的作用,由動物實驗已知會造成生殖毒性、DNA損傷等,且在雄性子代中會造成隱睪症、尿道下裂症、不孕症和睪丸異常等生殖相關疾病。其他研究也指出在小鼠實驗發現,會造成其肝臟損傷以及過氧化體增生,造成致癌,且也發現會誘發氧化壓力產生及粒線體的功能缺失。然而,塑化劑對於動物體甚至於人體之基因穩定性及基因突變率的影響仍是未知的。因此,我們以酵母菌做為模式生物,探討塑化劑對細胞基因穩定性之影響。我們首先利用不同劑量的塑化劑dibutyl phthalate (DBP)和dimethyl phthalate (DMP),將其溶解在液態培養液中與正常及錯誤配對基因剔除 (msh2Δ, msh3Δ, msh6Δ)的酵母菌共培養,觀察其不同天數的生長曲線和細胞存活率。而對於基因穩定性之影響則是藉由基因突變分析法 (CANr, Hom+, Lys+)觀察其突變率。結果顯示,塑化劑DBP及DMP對於正常及突變的酵母菌細胞的生長曲線皆有抑制效果,其中以最高濃度的DMP (5mM)最為顯著。而突變率分析試驗則是發現塑化劑DMP會造成msh6Δ突變株的酵母菌細胞之突變率顯著增加。而在ROS產生量方面,正常及突變細胞在加入塑化劑後,其過氧化氫及超氧陰離子的含量與控制組相比並無差異,但是對於正常細胞在加入DMP後,其過氧化氫量隨天數有顯著增加,此點與Lys+的結果相同。根據我們的研究,塑化劑對於正常細胞及突變細胞都會造成影響,且塑化劑會造成錯誤配對修復缺陷菌株之突變率增加,尤其以DMP會造成msh6Δ細胞株突變率有最明顯的上升,不過對於ROS的產生量,除了加入DMP的正常細胞外,其他組別並沒有顯著的影響。 | zh_TW |
dc.description.abstract | Plasticizers are abundant compounds used in the manufacturing industry. Some are known as endocrine disruptors, such as xenoestrogens. Others induce reproductive toxicity and damage to DNA. It was shown to cause liver damage, peroxisome proliferation, and induce carcinogenesis in mouse. Animal studise also showed that DEHP caused oxidative stress, mitochondrial dysfunction and contributed phthalate-induced disruption of spermatogenesis. However, it is not known whether DEHP and other derivatives can cause genome instability, which is a hallmark of cancer. Thus, the objective of this study is to study the effect of DBP and DMP on genome stability using S. cerevisiae as a model. We treated yeast cells with various concentrations (0.05mM, 0.5mM, 5mM) of DBP and DMP determined cell growth and viabilities. Normal cells and DNA repair defective cells (msh2Δ, msh3Δ, msh6Δ) were cultured with DBP and DMP or without. Genome stability can be evaluated by measuring rates of gene mutation, including CANr, Hom+ and Lys+ mutation assays. Results showed that plasticizers inhibited cells growth and cell viabilities. Particularly, five milimole of DMP showed the most effective inhibition. We observed that DMP induced the highest mutation rate in msh6Δ cells compared to WT, msh2Δ and msh3Δ cells. There was no significant difference on ROS levels in cells treated with or without DBP and DMP. Our results suggest that DBP and DMP may have adverse effect on genome stability in mismatch repair defective cells. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T16:11:57Z (GMT). No. of bitstreams: 1 ntu-102-R99641018-1.pdf: 1839961 bytes, checksum: 8be09054bbd4bb423538d6e451aa30b0 (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | 誌謝................................................................i
摘要...............................................................ii Abstract............................................................iii 目錄...............................................................iv 圖目錄.............................................................vii 表目錄.............................................................ix 縮寫對照表...........................................................x 第一章、前言.........................................................1 第二章、文獻整理.....................................................2 第一節 鄰苯二甲酸酯類(Phthalates) ..............................2 一、鄰苯二甲酸酯類之結構.....................................3 二、鄰苯二甲酸酯類對動物的影響...............................6 三、鄰苯二甲酸酯類在人體之代謝...............................7 四、鄰苯二甲酸酯類對於人體造成之影響.........................9 第二節 鄰苯二甲酸酯類對動物體之影響機制.....................11 一、 鄰苯二甲酸酯類做為內分泌甘擾素影響賀爾蒙...............11 二、鄰苯二甲酸酯類對動物體影響之反應機制....................13 第三節 酵母菌 Saccharomyces cerevisiae可做為一良好模式生物.....17 一、酵母菌做為模式生物的優點................................18 二、與癌症發生相關的可能調控機制............................19 第四節 DNA修復............................................21 一、非同源黏合 (Non-homologous end joining, NHEJ) .............22 二、同源重組修復 (Homologous recombination, HR)...............23 三、鹼基切割修復 (Base-excision repair, BER)....................25 四、核甘酸切割修復 (Nucleotide-excision repair, NER).............25 五、複製後修復 (Post-replication repair, PRR).....................25 六、錯誤配對修復 (Mismatch repair, MMR)......................26 第五節、 錯誤配對修復 (MMR)...................................28 一、錯誤配對修復系統的修復機制..............................29 (I) DNA損傷部位確認....................................29 (II) DNA修復複合體之交互作用...........................31 (III) 新舊股之辨認......................................33 (IV) DNA股切割、合成與黏合.............................33 二、MMR系統缺陷與癌症之間的關係...........................34 第三章、實驗架構....................................................35 第四章、材料與方法..................................................36 第一節、實驗材料................................................36 一、酵母種類................................................36 二、培養液及培養皿..........................................37 三、Canavanine培養皿........................................38 四、Lys及Thr胺基酸剔除培養皿...............................39 五、塑化劑..................................................40 第二節、實驗儀器................................................41 第三節、實驗方法................................................42 一、酵母菌培養方式..........................................42 二、酵母菌生長曲線及存活率..................................42 三、突變率分析試驗..........................................43 四、活性態氧自由基測試......................................46 五、統計分析................................................46 第五章、結果與討論 第一節、不同種類及濃度的塑化劑對酵母菌生長曲線之影響............47 第二節、不同種類及濃度的塑化劑對酵母菌存活率之影響..............51 第三節、在塑化劑處理下對酵母菌基因突變率之影響..................54 一、Can耐受突變(Can forward mutation).........................54 二、Hom回復突變(Hom revertant mutation).......................57 三、Lys回復突變(Lys revertant mutation).........................59 第四節、塑化劑處理下對酵母菌ROS產生量之影響...................62 第六章、結論........................................................66 第七章、參考文獻....................................................68 | |
dc.language.iso | zh-TW | |
dc.title | 塑化劑對酵母菌基因穩定性之影響 | zh_TW |
dc.title | The effect of plasticizer on genome stability in S. cerevisiae. | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 高承福,謝淑貞 | |
dc.subject.keyword | 塑化劑,DNA損傷,氧化壓力,基因突變,錯誤配對修補, | zh_TW |
dc.subject.keyword | plasticizer,DNA damage,oxidative stress,gene mutation,mismatch repair, | en |
dc.relation.page | 94 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2013-02-18 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 食品科技研究所 | zh_TW |
顯示於系所單位: | 食品科技研究所 |
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