Mitochondrial injury in enterovirus 71-infected Vero cells and its mechanism
- VernacularTitle:肠道病毒71型对Vero细胞线粒体的损伤作用及机制
- Author:
Peixin LIN
1
;
Hong SHEN
;
Lulu GAO
;
Yeen HUANG
;
Yaozhong ZHANG
;
Qing CHEN
Author Information
1. 南方医科大学 基础医学院病理学系
- Keywords:
enterovirus 71;
Vero cells;
ultrastructure;
mitochondrial injury
- From:
Journal of Southern Medical University
2015;(6):857-861
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the mitochondrial injury in enterovirus 71 (EV71)-infected Vero cells and explore the possible mechanism. Methods A clinical isolate of EV71 was inoculated to Vero cells and the EV71 antigen was detected by immunofluorescence assay. The morphological changes of Vero cells were observed using optical microscopy and transmission electron microscopy. The diameter and area density of the viral particles and the ratio and area density of vacuolated mitochondria in the cells were measured on the ultrastructural images. Results EV71-infected Vero cells underwent obvious changes and to a spherical morphology followed by cell death EV71 particles were detected in the cytoplasm by immunofluorescence. Ultrastructurally, the infected cells contained a large number of viral particles in the cytoplasm, with a clustered distribution and lattice-like arrangement. The diameter of the particles were 16.3 nm and the mean area density was 38.3% . Most of the mitochondria presented with swelling, vacuoles and degeneration. The ratio of the vacuolated mitochondria was 90.9%with a mean area density of 89.2%. Viral particles were also found in some mitochondria. Conclusion EV71 proliferates in the cytoplasm and invades the mitochondria of infected Vero cells leading to mitochondrial injury and cell death, suggesting that mitochondria are the targets for EV71 infection.
