DOAJ Open Access 2021

Intra-Abdominal Lipopolysaccharide Clearance and Inactivation in Peritonitis: Key Roles for Lipoproteins and the Phospholipid Transfer Protein

Maxime Nguyen Maxime Nguyen Maxime Nguyen Maxime Nguyen Gaëtan Pallot +33 lainnya

Abstrak

IntroductionDuring peritonitis, lipopolysaccharides (LPS) cross the peritoneum and pass through the liver before reaching the central compartment. The aim of the present study was to investigate the role of lipoproteins and phospholipid transfer protein (PLTP) in the early stages of LPS detoxification.Material and MethodsPeritonitis was induced by intra-peritoneal injection of LPS in mice. We analyzed peritoneal fluid, portal and central blood. Lipoprotein fractions were obtained by ultracentrifugation and fast protein liquid chromatography. LPS concentration and activity were measured by liquid chromatography coupled with mass spectrometry and limulus amoebocyte lysate. Wild-type mice were compared to mice knocked out for PLTP.ResultsIn mice expressing PLTP, LPS was able to bind to HDL in the peritoneal compartment, and this was maintained in plasma from portal and central blood. A hepatic first-pass effect of HDL-bound LPS was observed in wild-type mice. LPS binding to HDL resulted in an early arrival of inactive LPS in the central blood of wild-type mice.ConclusionPLTP promotes LPS peritoneal clearance and neutralization in a model of peritonitis. This mechanism involves the early binding of LPS to lipoproteins inside the peritoneal cavity, which promotes LPS translocation through the peritoneum and its uptake by the liver.

Topik & Kata Kunci

Immunologic diseases. Allergy

Penulis (38)

Maxime Nguyen

Gaëtan Pallot

Antoine Jalil

Annabelle Tavernier

Aloïs Dusuel

Naig Le Guern

Laurent Lagrost

Jean-Paul Pais de Barros

Hélène Choubley

Victoria Bergas

Pierre-Grégoire Guinot

David Masson

Belaid Bouhemad

Thomas Gautier

Format Sitasi

APA MLA BibTeX

Nguyen, M., Nguyen, M., Nguyen, M., Nguyen, M., Pallot, G., Pallot, G. et al. (2021). Intra-Abdominal Lipopolysaccharide Clearance and Inactivation in Peritonitis: Key Roles for Lipoproteins and the Phospholipid Transfer Protein. https://doi.org/10.3389/fimmu.2021.622935

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Informasi Jurnal

Tahun Terbit: 2021
Sumber Database: DOAJ
DOI: 10.3389/fimmu.2021.622935
Akses: Open Access ✓