Ultrastructural and Functional Characterization of Mitochondrial Dynamics Induced by Human Respiratory Syncytial Virus Infection in HEp-2 Cells.

Ultrastructural and Functional Characterization of Mitochondrial Dynamics Induced by Human Respiratory Syncytial Virus Infection in HEp-2 Cells.
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DOI:
10.3390/v15071518
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发表时间:
2023-07-07
期刊:
Viruses
影响因子:
--
通讯作者:
Comas-Garcia M
Comas-Garcia M
中科院分区:
其他
文献类型:
--
作者:
Lara-Hernandez I;Muñoz-Escalante JC;Bernal-Silva S;Noyola DE;Wong-Chew RM;Comas-García A;Comas-Garcia M

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人呼吸道合胞病毒(hRSV)是全球五岁以下儿童和老年人急性下呼吸道感染的主要原因。在hRSV感染期间,宿主细胞经历内膜细胞器(包括线粒体)的变化。这种细胞器负责细胞中的能量产生,并在抗病毒反应中发挥重要作用。本研究的重点是表征超微结构和功能的变化,在hRSV感染过程中,使用薄切片透射电子显微镜和RT-qPCR。在这里,我们报告说,hRSV感染改变线粒体形态动力学通过调节抗病毒反应过程中的关键基因的表达,如Mfn 1,VDAC 2和PINK 1。我们的研究结果表明,hRSV在感染过程中改变线粒体形态,产生线粒体表型,嵴缩短,基质肿胀,膜受损。我们还观察到,hRSV感染调节上述基因的表达,可能是面对细胞抗病毒反应的逃避机制。总之,这些结果推进了我们对与hRSV感染相关的超微结构改变的认识,并可能指导未来的治疗努力,以开发有效的抗病毒药物用于hRSV治疗。
Human respiratory syncytial virus (hRSV) is the leading cause of acute lower respiratory tract infections in children under five years of age and older adults worldwide. During hRSV infection, host cells undergo changes in endomembrane organelles, including mitochondria. This organelle is responsible for energy production in the cell and plays an important role in the antiviral response. The present study focuses on characterizing the ultrastructural and functional changes during hRSV infection using thin-section transmission electron microscopy and RT-qPCR. Here we report that hRSV infection alters mitochondrial morphodynamics by regulating the expression of key genes in the antiviral response process, such as Mfn1, VDAC2, and PINK1. Our results suggest that hRSV alters mitochondrial morphology during infection, producing a mitochondrial phenotype with shortened cristae, swollen matrix, and damaged membrane. We also observed that hRSV infection modulates the expression of the aforementioned genes, possibly as an evasion mechanism in the face of cellular antiviral response. Taken together, these results advance our knowledge of the ultrastructural alterations associated with hRSV infection and might guide future therapeutic efforts to develop effective antiviral drugs for hRSV treatment.
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