人細(xì)小病毒B19VP2蛋白的優(yōu)勢(shì)表達(dá)與抗原活性檢測(cè)
[Abstract]:Objective: human parvovirus B19 (Human parvovirus B19 may cause idiopathic thrombocytopenic purpura and acute aplastic anemia. Childhood rheumatoid arthritis, Henoch-Schonlein purpura and other diseases, and can cause fetal edema, stillbirth, abortion and congenital malformation, The genome of B19 mainly encodes two structural proteins VP1 (85KDa) and VP2 (58KDa) and a non-structural protein NS (77KDa). VP1 and VP2 have antigenicity. Can stimulate the body to produce the corresponding IgM and IgG antibodies, can be used in the diagnosis of B19 virus infection. Specific antibodies could be produced after infection with B19 virus in children with normal immune function. The positive results of B19-VP2-IgM suggested that short-term infection or acute infection could be detected 3 days after onset, and reached the peak at 2-3 weeks and lasted for 2-3 months. It is suitable for early diagnosis of B19 virus infection. However, due to the difficult source of B19 virus antigen, there are few serological detection reagents in China. Most of the clinical diagnosis uses expensive imported ELISA kit. With the development of molecular biology, many viral capsid proteins can be expressed in vitro, which opens up a new way to solve the problem of B19 virus antigen source. In this study, the bioinformatics analysis of the VP2 sequence of B19 virus showed that the fragment of 4354-4662bp (309bp, 351x454 amino acid) with high surface accessibility was selected as the research object. The fragment of VP2 gene and the recombinant VP2 protein were obtained by molecular biological method. The biological function of the recombinant protein was analyzed by ELISA. Content and results of the study:
【學(xué)位授予單位】:中國(guó)人民解放軍軍事醫(yī)學(xué)科學(xué)院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2006
【分類號(hào)】:R373
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