<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>Salmonella</italic> infection is most common in patients with infected aortic aneurysm, especially in Asia. When the aortic wall is heavily atherosclerotic, the intima is vulnerable to invasion by <italic>Salmonella</italic>, leading to the development of infected aortic aneurysm. By using THP-1 macrophage-derived foam cells to mimic atherosclerosis, we investigated the role of three <italic>Salmonella enterica</italic> serotypes – Typhimurium, Enteritidis, and Choleraesuis – in foam cell autophagy and inflammasome formation. Herein, we provide possible pathogenesis of <italic>Salmonella</italic>-associated infected aortic aneurysms. Three <italic>S. enterica</italic> serotypes with or without virulence plasmid were studied. Through Western blotting, we investigated cell autophagy induction and inflammasome formation in <italic>Salmonella</italic>-infected THP-1 macrophage-derived foam cells, detected CD36 expression after <italic>Salmonella</italic> infection through flow cytometry, and measured interleukin (IL)-1β, IL-12, and interferon (IFN)-α levels through enzyme-linked immunosorbent assay. At 0.5 h after infection, plasmid-bearing <italic>S</italic>. Enteritidis OU7130 induced the highest foam cell autophagy – significantly higher than that induced by plasmid-less OU7067. However, plasmid-bearing <italic>S.</italic> Choleraesuis induced less foam cell autophagy than did its plasmid-less strain. In foam cells, plasmid-less <italic>Salmonella</italic> infection (particularly <italic>S</italic>. Choleraesuis OU7266 infection) led to higher CD36 expression than did plasmid-bearing strains infection. OU7130 and OU7266 infection induced the highest IL-1β secretion. OU7067-infected foam cells secreted the highest IL-12p35 level. Plasmid-bearing <italic>S.</italic> Typhimurium OU5045 induced a higher IFN-α level than did other <italic>Salmonella</italic> serotypes. <italic>Salmonella</italic> serotypes are correlated with foam cell autophagy and IL-1β secretion. <italic>Salmonella</italic> may affect the course of foam cells formation, or even aortic aneurysm, through autophagy.</p></abstract>

Salmonella infection is most common in patients with infected aortic aneurysm, especially in Asia. When the aortic wall is heavily atherosclerotic, the intima is vulnerable to invasion by Salmonella, leading to the development of infected aortic aneurysm. By using THP-1 macrophage-derived foam cells to mimic atherosclerosis, we investigated the role of three Salmonella enterica serotypes – Typhimurium, Enteritidis, and Choleraesuis – in foam cell autophagy and inflammasome formation. Herein, we provide possible pathogenesis of Salmonella-associated infected aortic aneurysms. Three S. enterica serotypes with or without virulence plasmid were studied. Through Western blotting, we investigated cell autophagy induction and inflammasome formation in Salmonella-infected THP-1 macrophage-derived foam cells, detected CD36 expression after Salmonella infection through flow cytometry, and measured interleukin (IL)-1β, IL-12, and interferon (IFN)-α levels through enzyme-linked immunosorbent assay. At 0.5 h after infection, plasmid-bearing S. Enteritidis OU7130 induced the highest foam cell autophagy – significantly higher than that induced by plasmid-less OU7067. However, plasmid-bearing S. Choleraesuis induced less foam cell autophagy than did its plasmid-less strain. In foam cells, plasmid-less Salmonella infection (particularly S. Choleraesuis OU7266 infection) led to higher CD36 expression than did plasmid-bearing strains infection. OU7130 and OU7266 infection induced the highest IL-1β secretion. OU7067-infected foam cells secreted the highest IL-12p35 level. Plasmid-bearing S. Typhimurium OU5045 induced a higher IFN-α level than did other Salmonella serotypes. Salmonella serotypes are correlated with foam cell autophagy and IL-1β secretion. Salmonella may affect the course of foam cells formation, or even aortic aneurysm, through autophagy.

<italic>Salmonella</italic>-Infected Aortic Aneurysm: Investigating Pathogenesis Using <italic>Salmonella</italic> Serotypes

Polish Journal of Microbiology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

-Infected Aortic Aneurysm: Investigating Pathogenesis Using  Serotypes

Salmonella infection is most common in patients with infected aortic aneurysm, especially in Asia. When the aortic wall is heavily atherosclerotic, the intima...

Salmonella-Infected Aortic Aneurysm: Investigating Pathogenesis Using Salmonella Serotypes

Article Category: original-paper

Publié en ligne: 22 oct. 2019

Pages: 439 - 447

Reçu: 17 avr. 2019

Accepté: 19 août 2019

DOI: https://doi.org/10.33073/pjm-2019-043

Mots clés
serotype, virulence plasmid, foam cell, autophagy, inflammasome

© 2019 Chishih Chu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Salmonella-Infected Aortic Aneurysm: Investigating Pathogenesis Using Salmonella Serotypes

Article Category: original-paper

Publié en ligne: 22 oct. 2019

Pages: 439 - 447

Reçu: 17 avr. 2019

Accepté: 19 août 2019

DOI: https://doi.org/10.33073/pjm-2019-043

Mots clésserotype, virulence plasmid, foam cell, autophagy, inflammasome

© 2019 Chishih Chu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
serotype, virulence plasmid, foam cell, autophagy, inflammasome