Filamentous particle formation by human parainfluenza virus type 2.

Filamentous particle formation by human parainfluenza virus type 2.
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2 型人类副流感病毒形成丝状颗粒。

DOI:
10.1099/0022-1317-81-5-1305
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发表时间:
2000
期刊:
The Journal of general virology.
影响因子:
--
通讯作者:
Compans,RW
Compans,RW
中科院分区:
--
文献类型:
--
作者:
Yao,Q;Compans,RW

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一些副粘病毒形成长的丝状病毒颗粒:然而,丝状体形成的决定因素以及这些颗粒在病毒传播和致病性中的作用尚不清楚。通过使用常规免疫荧光显微镜,我们发现人副流感病毒2型(HPIV 2)在病毒感染的极化上皮细胞中形成长度为5至15 μm的丝状颗粒。丝状颗粒的形成被发现是病毒类型特异性的,并且当相同的细胞类型被副流感病毒3型或仙台病毒感染时没有观察到,这表明不同的副粘病毒属表现出不同的形态学特性。发现细胞松弛素D(CD)或茉莉花激酶处理以剂量依赖性方式抑制HPIV 2丝状颗粒形成。在4 μg/ml CD或1 μM茉莉花内酯的存在下,丝状颗粒的形成被完全消除,尽管出现了类似的血凝和p.f.u.发现在感染后24小时病毒滴度释放到培养基中。这些观察结果表明,宿主细胞成分,包括肌动蛋白微丝网络,是副流感病毒形态的重要决定因素。丝状颗粒在极化上皮细胞中的优势可能反映了这些颗粒在人类上皮组织感染中的特定致病作用。
Some paramyxoviruses form long filamentous virus particles: however, the determinants of filament formation and the role of such particles in virus transmission and pathogenicity are not clearly defined. By using conventional immunofluorescence microscopy, we found that human parainfluenza virus type 2 (HPIV2) forms filamentous particles ranging from 5 to 15 μm in length in virus-infected, polarized epithelial cells. The formation of filamentous particles was found to be virus type-specific and was not observed when the same cell types were infected with parainfluenza virus type 3 or Sendai virus, suggesting that different paramyxovirus genera exhibit distinct morphological properties. HPIV2 filamentous particle formation was found to be inhibited by cytochalasin D (CD) or jasplakinolide treatment in a dose-dependent manner. In the presence of 4 μg/ml CD or 1 μM jasplakinolide, the formation of filamentous particles was completely abolished, although similar haemagglutination and p.f.u. titres of virus were found to be released into the culture medium at 24 h post-infection. These observations indicate that host cell components, including the actin microfilament network, are important determinants of the morphology of parainfluenza viruses. The predominance of filamentous particles in polarized epithelial cells may reflect specific pathogenic roles of these particles in infection of human epithelial tissues.
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