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Chronic hepatitis C virus infection impairs natural killer cells–dendritic cells cross‐talk: An in vitro culture study
Microbiology and Immunology ( IF 2.6 ) Pub Date : 2020-11-05 , DOI: 10.1111/1348-0421.12858
Dina Ragab 1 , Dalia Samaha 1 , Nesrine Mohamed 1 , Mona Rafik 1 , Walid Abdel Hady 1
Affiliation  

To examine the cross‐talk between NK cells and DCs in hepatitis C virus (HCV) infection, we isolated monocytes and NK cells from 20 chronic HCV patients and 20 healthy controls. Monocytes were used to generate immature DCs which were pulsed with HCV peptides (core, NS3–NS4, and NS5). Four different cocultures were carried out: E1, both DCs and NK cells were from a chronic HCV patient; E2, NK cells from a healthy control cocultured with DCs from a chronic HCV patient; E3, NK cells from a chronic HCV patient cocultured with DCs from a healthy control; and E4, both DCs and NK cells were from a healthy control. Using flow cytometry, we assessed the effect of these different cocultures on levels of maturation markers on DCs and levels of activation/inhibition markers on NK cells. Results showed that peptide‐pulsed HCV DCs showed a maturation defect in the form of decreased HLA‐DR, decreased CD86, and increased CD83 expression especially when cocultured with HCV NK. This was mainly due to core peptide pulsing and to a lesser extent due to NS5 pulsing, whereas there was no effect with NS3–NS4 pulsing. Alternatively, HCV NK cells upregulated both activation and inhibition markers especially when cocultured with healthy DCs. Compared with E2, E1 resulted in higher apoptosis of both NK cells and DCs with the percentage of NK apoptosis higher than that of DCs. Taken together, the data indicate that HCV infection impairs NK–DC cross‐talk which may be a leading cause in viral persistence and chronicity.

中文翻译:

慢性丙型肝炎病毒感染损害自然杀伤细胞-树突状细胞串扰:一项体外培养研究

为了检查丙型肝炎病毒 (HCV) 感染中 NK 细胞和 DC 之间的串扰,我们从 20 名慢性 HCV 患者和 20 名健康对照者中分离了单核细胞和 NK 细胞。单核细胞用于产生未成熟的 DC,这些 DC 用 HCV 肽(核心、NS3-NS4 和 NS5)进行脉冲处理。进行了四种不同的共培养:E1,DC 和 NK 细胞均来自慢性 HCV 患者;E2,来自健康对照的 NK 细胞与来自慢性 HCV 患者的 DC 共培养;E3,来自慢性 HCV 患者的 NK 细胞与来自健康对照的 DC 共培养;在 E4 中,DC 和 NK 细胞均来自健康对照。使用流式细胞术,我们评估了这些不同共培养物对 DC 成熟标志物水平和 NK 细胞激活/抑制标志物水平的影响。结果表明,肽脉冲的 HCV DC 表现出成熟缺陷,表现为 HLA-DR 降低、CD86 降低和 CD83 表达增加,尤其是与 HCV NK 共培养时。这主要是由于核心肽脉冲,在较小程度上是由于 NS5 脉冲,而 NS3-NS4 脉冲没有影响。或者,HCV NK 细胞上调激活和抑制标志物,尤其是与健康 DC 共培养时。与 E2 相比,E1 导致 NK 细胞和 DCs 更高的凋亡,NK 细胞凋亡百分比高于 DCs。总之,数据表明 HCV 感染会损害 NK-DC 串扰,这可能是病毒持续存在和慢性化的主要原因。这主要是由于核心肽脉冲,在较小程度上是由于 NS5 脉冲,而 NS3-NS4 脉冲没有影响。或者,HCV NK 细胞上调激活和抑制标志物,尤其是与健康 DC 共培养时。与 E2 相比,E1 导致 NK 细胞和 DCs 更高的凋亡,NK 细胞凋亡百分比高于 DCs。总之,数据表明 HCV 感染会损害 NK-DC 串扰,这可能是病毒持续存在和慢性化的主要原因。这主要是由于核心肽脉冲,在较小程度上是由于 NS5 脉冲,而 NS3-NS4 脉冲没有影响。或者,HCV NK 细胞上调激活和抑制标志物,尤其是与健康 DC 共培养时。与 E2 相比,E1 导致 NK 细胞和 DCs 更高的凋亡,NK 细胞凋亡百分比高于 DCs。总之,数据表明 HCV 感染会损害 NK-DC 串扰,这可能是病毒持续存在和慢性化的主要原因。E1 导致 NK 细胞和 DCs 更高的凋亡率,NK 细胞凋亡率高于 DCs。总之,数据表明 HCV 感染会损害 NK-DC 串扰,这可能是病毒持续存在和慢性化的主要原因。E1 导致 NK 细胞和 DCs 更高的凋亡率,NK 细胞凋亡率高于 DCs。总之,数据表明 HCV 感染会损害 NK-DC 串扰,这可能是病毒持续存在和慢性化的主要原因。
更新日期:2020-11-05
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