人偏肺病毒入胞機(jī)制的研究
[Abstract]:Human metapneumovirus (hMPV) is an important pathogen causing respiratory tract infections in infants and young children. It mainly causes upper and lower respiratory tract infections in infants and young children. There are two main types of host cells: membrane fusion and endocytosis. In this study, we first studied whether hMPV is membrane fusion or endocytosis. Indirect immunofluorescence, R18 fusion, and R18/DiOC dual-wavelength imaging demonstrated that hMPV has endocytosis when it enters Vero E6 cells. Lipid raft is widely distributed on the surface of cell membrane, so we have studied whether lipid raft is involved in the process of hMPV endocytosis. Part I: The purpose of this study is to explore the entry mode of hMPV into Vero E6 cells by endocytosis, and to find an effective way to block the infection of hMPV through the study of its entry mechanism. Free hMPV was washed and fixed at 60 min, 120 min. The fusion protein (F protein) coated with green fluorescent antibody was labeled and the core protein (n protein) located in the nucleus was labeled with red fluorescent antibody. The number of hMPV entering veroe6 cells at 0 min, 30 min, 60 min and 120 min after infection and the number of hMPV entering veroe6 cells were observed by laser confocal microscopy. The location of hMPV in the cells was observed by R18 dye. the cells were infected with the stained hMPV for 4 hours. the fusion of hMPV in the cytoplasm of veroe 6 cells was observed by confocal laser microscopy. finally, the hMPV envelope was stained with dioc and R18 dyes, and veroe 6 cells were infected with the stained hMPV Results: Fluorescent antibody labeling of hMPV F protein and N protein showed that co-localization of F protein and N protein was observed in veroe 6 cells at different time points and the number of co-localization points increased with time. The results showed that Hpv maintained the integrity of virus granule structure when it entered veroe 6 cells. In R18 fusion experiment, red fluorescence was observed and increased gradually with the increase of time, indicating that membrane fusion occurred during the process of entry. In dioc / R18 fusion experiment, red fluorescence was observed throughout the whole process. The green fluorescence appeared later than the red fluorescence, and the yellow fluorescence showed a sharp rise after 30 minutes, indicating that the membrane fusion between the hMPV envelope and the cell membrane occurred in the cytoplasm after 30 minutes. In the process of experiment, indirect immunofluorescence was used to prove that hMPV could enter the cell completely; then R18 fusion experiment was used to prove that hMPV fused with the cell membrane when it entered the cell; finally, R18 / dioc fusion experiment was used to prove that the membrane fusion took place in the cytoplasm when hMPV entered the cell for 30 minutes, and the location of membrane fusion took place in the cytoplasm. Objective: To investigate the role of lipid rafts in the process of human metapneumovirus (HMPV) entry into Vero E6 cells, and to further understand the process of HMPV entry through the study of lipid rafts. Cholera toxin subunit (CTB) was added to 6 HBE cells at the same time. Fixed cells were immobilized at 0, 30, 60 and 120 minutes after infection, labeled with red fluorescent antibodies for fusion protein of h-MPV (F protein), and the relationship between CTB and h-MPV at different time points was observed by confocal laser microscopy. H MPV titer was detected by fluorescence quantitative PCR 24 hours after treatment with 20 ug/ml, 30 ug/ml Nystatin and 15 mg/ml exogenous cholesterol and 5 mg/ml M beta CD respectively. The co-localization of the labeled cholera toxin subunits was found, and the co-localization point increased gradually with the increase of time; the H MPV gradually moved toward the nucleus with the increase of CTB. The titer of H MPV decreased by 81%, 90% and 98% respectively with the increase of drug concentration after Mbeta CD treatment; the titer of H MPV decreased by 90% and 98% respectively with the increase of drug concentration after Nystatin treatment. When the concentration of cholesterol reached 100 ug/ml, the infection of H MPV was significantly increased, and the titer of H MPV was 4 times as high as that of the drug treatment group. First, CTB was used to label lipid rafts, and CTB was used to observe the location relationship between lipid rafts and H MPV at different time points. Then, the effect of lipid raft destruction on the infection of H MPV was detected by using two drug-treated cells, M-beta-CD and Nystatin. Finally, the possibility of adding exogenous cholesterol was detected by exogenous cholesterol salvage test. In order to restore h MPV infection, these experiments confirmed that lipid rafts were involved in the process of human PPV endocytosis.
【學(xué)位授予單位】:重慶醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:R373
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 呂治林;青壯年和老年人中的人偏肺病毒感染[J];國(guó)外醫(yī)學(xué).流行病學(xué)傳染病學(xué)分冊(cè);2003年05期
2 陳勇;人偏肺病毒的研究概況[J];國(guó)外醫(yī)學(xué).流行病學(xué)傳染病學(xué)分冊(cè);2004年05期
3 王華麗;徐新獻(xiàn);;人偏肺病毒感染的認(rèn)識(shí)和研究[J];醫(yī)學(xué)綜述;2007年20期
4 蘇淵;徐通;;兒童人偏肺病毒感染[J];中國(guó)兒童保健雜志;2011年07期
5 趙穎;;人偏肺病毒感染的研究進(jìn)展[J];寧夏醫(yī)學(xué)雜志;2013年07期
6 苗正友;徐營(yíng);李平;;嘉興地區(qū)住院嬰幼兒感染人偏肺病毒的研究[J];中華醫(yī)院感染學(xué)雜志;2010年24期
7 高文娟;謝會(huì)卿;楊清;馮惠清;;兒童人偏肺病毒感染的研究進(jìn)展[J];中國(guó)兒童保健雜志;2013年05期
8 過(guò)依;萬(wàn)歡英;;人偏肺病毒研究進(jìn)展[J];上海交通大學(xué)學(xué)報(bào)(醫(yī)學(xué)版);2007年02期
9 沈軍;朱啟昒;;人偏肺病毒研究進(jìn)展[J];傳染病信息;2007年02期
10 任妍;陳昕;杜麗娜;趙曉東;;人偏肺病毒檢測(cè)方法的比較[J];中國(guó)生物制品學(xué)雜志;2010年02期
相關(guān)會(huì)議論文 前10條
1 毛華偉;趙曉東;;人偏肺病毒在中國(guó)大陸的首次分離及其特征[A];中華醫(yī)學(xué)會(huì)第十四次全國(guó)兒科學(xué)術(shù)會(huì)議論文匯編[C];2006年
2 吳栩;汪天林;陳志敏;吳亦棟;鄭劍峰;;熒光定量PCR檢測(cè)呼吸道標(biāo)本中的人偏肺病毒[A];中華醫(yī)學(xué)會(huì)第十七次全國(guó)兒科學(xué)術(shù)大會(huì)論文匯編(下冊(cè))[C];2012年
3 吳栩;汪天林;陳志敏;吳亦棟;鄭劍峰;;熒光定量PCR檢測(cè)呼吸道標(biāo)本中的人偏肺病毒[A];中華醫(yī)學(xué)會(huì)第十三屆全國(guó)兒科呼吸學(xué)術(shù)會(huì)議論文匯編[C];2012年
4 汪天林;陳志敏;唐蘭芳;湯宏峰;;兒童人偏肺病毒下呼吸道感染的流行病學(xué)調(diào)查[A];中華醫(yī)學(xué)會(huì)第十七次全國(guó)兒科學(xué)術(shù)大會(huì)論文匯編(上冊(cè))[C];2012年
5 王婷;李昌崇;陳小芳;;溫州地區(qū)人偏肺病毒在急性喘息患兒中的檢測(cè)及其臨床特征的分析[A];2012年江浙滬兒科學(xué)術(shù)年會(huì)暨浙江省醫(yī)學(xué)會(huì)兒科學(xué)分會(huì)學(xué)術(shù)年會(huì)、兒內(nèi)科疾病診治新進(jìn)展國(guó)家級(jí)學(xué)習(xí)班論文匯編[C];2012年
6 丁妞;饒花平;金世杰;羅力妍;楊婷;;2009-2011年湖南地區(qū)兒童呼吸道人偏肺病毒及其他病毒混合感染的流行特征[A];中華醫(yī)學(xué)會(huì)第十三屆全國(guó)兒科呼吸學(xué)術(shù)會(huì)議論文匯編[C];2012年
7 丁妞;饒花平;金世杰;羅力妍;楊婷;;2009-2011年湖南地區(qū)兒童呼吸道人偏肺病毒及其他病毒混合感染的流行特征[A];中華醫(yī)學(xué)會(huì)第十七次全國(guó)兒科學(xué)術(shù)大會(huì)論文匯編(上冊(cè))[C];2012年
8 張麗榮;;人偏肺病毒(hMPV)研究進(jìn)展[A];新發(fā)和再發(fā)傳染病防治熱點(diǎn)研討會(huì)論文集[C];2011年
9 宋秦偉;朱汝南;錢(qián)淵;趙林清;鄧潔;孫宇;王芳;丁雅馨;;應(yīng)用LAMP技術(shù)檢測(cè)人偏肺病毒核酸方法的建立[A];中華醫(yī)學(xué)會(huì)第十七次全國(guó)兒科學(xué)術(shù)大會(huì)論文匯編(上冊(cè))[C];2012年
10 駱亞麗;季偉;季正華;王宇清;吳軍華;黃璐;;人偏肺病毒與呼吸道合胞病毒感染患兒外周血細(xì)胞因子變化比較及意義[A];第六屆江浙滬兒科學(xué)術(shù)會(huì)議暨兒科學(xué)基礎(chǔ)與臨床研究進(jìn)展學(xué)術(shù)班論文匯編[C];2009年
相關(guān)博士學(xué)位論文 前5條
1 余春梅;免疫缺陷小鼠人偏肺病毒感染特點(diǎn)[D];重慶醫(yī)科大學(xué);2010年
2 沈軍;人偏肺病毒及多種病原體致兒童急性下呼吸道感染的臨床及分子流行病學(xué)特征[D];復(fù)旦大學(xué);2009年
3 劉文培;在湖南地區(qū)分離的人偏肺病毒株的基因分型及其候選疫苗的初步研究[D];中國(guó)疾病預(yù)防控制中心;2008年
4 陳昕;人偏肺病毒感染分子流行病學(xué)及與哮喘發(fā)作的關(guān)系[D];重慶醫(yī)科大學(xué);2010年
5 劉立穎;人偏肺病毒結(jié)構(gòu)蛋白N、F在三種不同系統(tǒng)中的表達(dá)[D];中國(guó)協(xié)和醫(yī)科大學(xué);2007年
相關(guān)碩士學(xué)位論文 前10條
1 郭鑫;貴陽(yáng)市500例兒童人偏肺病毒感染特征調(diào)查研究[D];貴陽(yáng)醫(yī)學(xué)院;2015年
2 張?jiān)坪?太原地區(qū)急性呼吸道人偏肺病毒與人博卡病毒感染兒童臨床特征分析[D];山西醫(yī)科大學(xué);2016年
3 何浩;人偏肺病毒入胞機(jī)制的研究[D];重慶醫(yī)科大學(xué);2017年
4 周真;人偏肺病毒標(biāo)準(zhǔn)株病毒適合度與致病性關(guān)系的探討[D];遵義醫(yī)學(xué)院;2012年
5 孔雯驊;武漢地區(qū)人偏肺病毒的分子流行病學(xué)研究[D];華中科技大學(xué);2013年
6 毛華偉;人偏肺病毒分離、融合蛋白表達(dá)及主要蛋白的免疫信息學(xué)分析[D];重慶醫(yī)科大學(xué);2006年
7 邱秀娟;2009-2012年蘇州地區(qū)住院兒童人偏肺病毒感染臨床研究[D];蘇州大學(xué);2015年
8 吳栩;熒光定量PCR檢測(cè)呼吸道標(biāo)本中的人偏肺病毒[D];浙江大學(xué);2010年
9 任妍;人偏肺病毒間接免疫熒光方法的建立及各種檢測(cè)方法的對(duì)比研究[D];重慶醫(yī)科大學(xué);2009年
10 佘薇薇;人偏肺病毒在不同細(xì)胞的復(fù)制動(dòng)力學(xué)[D];重慶醫(yī)科大學(xué);2010年
,本文編號(hào):2234574
本文鏈接:http://sikaile.net/yixuelunwen/jichuyixue/2234574.html