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Meningitis-causing APEC can invade the host central nervous system by crossing the blood\u2013brain barrier (BBB), which is a critical step in the development of meningitis. However, the bacteria-host interaction mechanism in this process remains unclear.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this study, we examined<jats:italic>E. coli<\/jats:italic>and bEnd.3 cells transcriptomes during infection and mock infection to investigate the global transcriptional changes in both organisms using RNA sequencing approach.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>When APEC infected the bEnd.3 cells, several significant changes in the expression of genes related to cell junctional complexes, extracellular matrix degradation, actin cytoskeleton rearrangement, immune activation and the inflammatory response in bEnd.3 cells were observed as compared to the mock infection group. Thus, the immune activation of bEnd.3 cells indicated that APEC infection activated host defenses. Furthermore, APEC may exploit cell junction degradation to invade the BBB. In addition, amino acid metabolism and energy metabolism related genes were downregulated and the protein export pathway related genes were upregulated in APEC cultured with bEnd.3 cells, compared to that in control. Thus, APEC may encounter starvation and express virulence factors during incubation with bEnd.3 cells.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study provides a comprehensive overview of transcriptomic changes that occur during APEC infection of bEnd.3 cells, and offers insights into the bacterial invasion strategies and the subsequent host defense mechanism.<\/jats:p><\/jats:sec>","DOI":"10.7717\/peerj.9172","type":"journal-article","created":{"date-parts":[[2020,5,21]],"date-time":"2020-05-21T09:12:58Z","timestamp":1590052378000},"page":"e9172","source":"Crossref","is-referenced-by-count":9,"title":["Transcriptome profiling of avian pathogenic<i>Escherichia coli<\/i>and the mouse microvascular endothelial cell line bEnd.3 during interaction"],"prefix":"10.7717","volume":"8","author":[{"given":"Peili","family":"Wang","sequence":"first","affiliation":[{"name":"College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 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