獻(xiàn)血者HEV標(biāo)志物分析及ORF3抗體在HEV毒株分型上的應(yīng)用
發(fā)布時間:2018-08-12 19:59
【摘要】:背景:戊型肝炎病毒(hepatitis E virus,HEV)是引起戊型肝炎的主要病原體。根據(jù)世界衛(wèi)生組織統(tǒng)計,2015年7月數(shù)據(jù),全球每年大約有2000萬人感染戊型肝炎,300多萬急性戊肝病例,5.66萬例與戊肝有關(guān)的死亡。在反復(fù)輸血和器官移植的患者中,戊型肝炎的比例要顯著高于普通人群,近年來,輸血傳播戊型肝炎的病例被廣泛報道出來。目的:為了解南京地區(qū)獻(xiàn)血人群中戊型肝炎的感染情況,及對血液安全的影響。利用Ⅰ-Ⅳ型ORF3抗原的結(jié)構(gòu)及免疫的特異性,對HEV-IgM陽性血清樣本進(jìn)行基因分型。方法:本研究針對通過檢驗科篩檢,按照目前標(biāo)準(zhǔn)可以供應(yīng)臨床使用,HBV、HCV、HIV、TP和ALT檢測均合格的獻(xiàn)血者樣本。進(jìn)一步進(jìn)行HEV的IgG、IgM水平的檢測,并且對HEVIgM陽性樣本進(jìn)行HEVRNA核酸檢測。另外采用真核細(xì)胞表達(dá)系統(tǒng),表達(dá)Ⅰ-Ⅳ型不同基因型的HEVORF3抗原,對HEVIgM陽性的血清樣本中ORF3抗體水平進(jìn)行檢測。利用Ⅰ-Ⅳ型ORF3抗原的結(jié)構(gòu)及免疫的特異性,對HEV-IgM陽性血清樣本進(jìn)行基因分型。使用western的方法,確證ORF3抗體的特異性及基因分型結(jié)果的準(zhǔn)確性。結(jié)果:本研究共檢測南京地區(qū)獻(xiàn)血者合格樣本5256例,其中HEV IgM陽性為99 例(1.88%),HEVIgG 陽性為 1624 例(30.90%),HEVIgM 和 HHEV-IgG 合并陽性為72例(1.37%)。HEV IgM陽性樣本中,檢測到HEV RNA陽性樣本1例(0.019%),HEV ORF3 抗體陽性 42 例,占 HEV IgM 陽性比 42.42%。經(jīng) ORF3抗體分型,全部為基因Ⅰ型和Ⅳ型,Ⅰ型13例(30.95%),Ⅳ型37例(88.09%),Ⅰ型、Ⅳ型合并感染者8例(19.04%)。結(jié)論:本研究在健康獻(xiàn)血人群的合格血液中,仍然能檢測到多項HEV的標(biāo)志物。按照目前的檢測手段和標(biāo)準(zhǔn),無法有效的排除戊型肝炎的感染風(fēng)險。Ⅰ-Ⅳ型ORF3抗體的檢測識別可用于HEV基因分型,通過western blot的檢測可用于確認(rèn)ORF3抗體的特異性,排除假陽性。
[Abstract]:Background: hepatitis E virus (hepatitis E virus) is the main pathogen of hepatitis E. According to the statistics of the World Health Organization (WHO), about 20 million people worldwide are infected with more than 3 million acute hepatitis E cases and 56600 deaths are related to hepatitis E every year, according to the statistics of the World Health Organization (WHO). The proportion of hepatitis E in patients with repeated blood transfusion and organ transplantation is significantly higher than that in the general population. In recent years, cases of transfusion transmitted hepatitis E have been widely reported. Objective: to investigate the infection of hepatitis E in blood donors in Nanjing and its influence on blood safety. The genotyping of HEV-IgM positive serum samples was carried out by using the structure and immunological specificity of type 鈪,
本文編號:2180202
[Abstract]:Background: hepatitis E virus (hepatitis E virus) is the main pathogen of hepatitis E. According to the statistics of the World Health Organization (WHO), about 20 million people worldwide are infected with more than 3 million acute hepatitis E cases and 56600 deaths are related to hepatitis E every year, according to the statistics of the World Health Organization (WHO). The proportion of hepatitis E in patients with repeated blood transfusion and organ transplantation is significantly higher than that in the general population. In recent years, cases of transfusion transmitted hepatitis E have been widely reported. Objective: to investigate the infection of hepatitis E in blood donors in Nanjing and its influence on blood safety. The genotyping of HEV-IgM positive serum samples was carried out by using the structure and immunological specificity of type 鈪,
本文編號:2180202
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