当前位置： SCI文献检索 > ARCHIVES OF ORAL BIOLOGY期刊下所有文献 > In vitro effect of Porphyromonas gingivalis combined with influenza A virus on respiratory epithelial cells.

In vitro effect of Porphyromonas gingivalis combined with influenza A virus on respiratory epithelial cells.

Abstract：

OBJECTIVE:Respiratory epithelial cells are the first natural barrier against bacteria and viruses; hence, the interactions among epithelial cells, bacteria, and viruses are associated with disease occurrence and development. The effect of co-infection by P. gingivalis and influenza A virus (IAV) on respiratory epithelial cells remains unknown. The aim of this study was to analyze in vitro cell viability and apoptosis rates in respiratory epithelial A549 cells infected with P. gingivalis or IAV alone, or a combination of both pathogens. DESIGN:A549 cells were first divided into a control group, a P. gingivalis group, an IAV group, and a P. gingivalis + IAV group, to examine cell viability and apoptosis rates, the levels of microtubule associated protein 1 light chain 3 B (LC3-II), microtubule associated protein 1 light chain 3A (LC3-I), and sequestosome 1 (P62), and the formation of autophagosomes. The autophagy inhibitor, 3-methyladenine (3MA), was used to assess autophagy and apoptosis in A549 cells infected with P. gingivalis or IAV. RESULTS:An MTT assay revealed that cell viability was significantly lower in the IAV group than in the P. gingivalis + IAV group (P < 0.05). Flow cytometry indicated that the apoptosis rate was significantly higher in the IAV group than in the P. gingivalis + IAV group (P < 0.05). The fluorescence levels of GFP-LC3 increased significantly, the LC3-II/LC3-I ratio was significantly higher, and the P62 protein levels were statistically lower in the P. gingivalis + IAV group compared with the IAV group (all P < 0.05). Western blotting revealed that the LC3- II/LC3-I ratio was significantly lower, and caspase-3 levels were significantly higher in the 3MA + P. gingivalis + IAV group compared to the P. gingivalis + IAV group (all P < 0.05). CONCLUSION:In vitro studies showed that infection by P. gingivalis combined with IAV temporarily inhibited apoptosis in respiratory epithelial cells, and this may be related to the initiation of autophagy.

journal_name

Arch Oral Biol

journal_title

Archives of oral biology

authors

Li X,Li C,Liu JC,Pan YP,Li YG

doi

10.1016/j.archoralbio.2018.04.003

subject

Has Abstract

pub_date

2018-11-01 00:00:00

pages

125-133

eissn

0003-9969

issn

1879-1506

pii

S0003-9969(18)30096-7

journal_volume

pub_type

杂志文章

在线工具

In vitro effect of Porphyromonas gingivalis combined with influenza A virus on respiratory epithelial cells.