HCoV-OC43逃避人樹(shù)突狀細(xì)胞免疫清除機(jī)制的初步研究
[Abstract]:Aim: to investigate the mechanism of human coronavirus OC43 (Human coronavirus OC43 (HCoV-OC43) escaping the immune surveillance of human Dendritic cells. Methods: OC43 virus was isolated from BSC-1 cells infected with HCoV-OC43 positive patients, detected by phase contrast microscope and identified by real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), differentiation of DC was induced by human cytokine GM-CSF and IL-4 combination. After 7 days of induction, DC2 was infected with HCoV-OC43 virus. The expression of DC function-related cytokines and the ratio of DC and the expression of function-related costimulatory molecules were detected by transmission electron microscopy (TEM) and real-time PCR. Results: the system of DC infected with HCoV-OC43 in vitro. HCoV-OC43 could infect DC and stimulate its immune response. However, the infection of HCoV-OC43 could significantly down-regulate the expression of IFN- 偽 -IFN- 尾 CCL3 and CCL5 in DC cells. However, the expression of HLA-DRN CD1c and CD86 was not inhibited. ConclusionHCoVOC43 can infect human DC cells and stimulate them to produce immune response, but HCoV-OC43 can prevent immune escape by inhibiting the secretion of IFN- 偽 and other related inflammatory factors and chemokines in host DC cells.
【作者單位】: 廣州醫(yī)科大學(xué)基礎(chǔ)學(xué)院病原生物學(xué)與免疫學(xué)教研室;中山大學(xué)熱帶病防治研究教育部重點(diǎn)實(shí)驗(yàn)室;中山大學(xué)香港大學(xué)粵港傳染病監(jiān)測(cè)聯(lián)合實(shí)驗(yàn)室;中山大學(xué)附屬第一醫(yī)院MICU室;
【基金】:國(guó)家傳染病防治科技重大專項(xiàng)(No.2012ZX10004-213) 國(guó)家自然科學(xué)基金項(xiàng)目(No.81000230) 廣東省自然科學(xué)基金青年項(xiàng)目(No.A030310282)資助
【分類號(hào)】:R392
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