An ERp57-mediated disulphide exchange promotes the interaction between Burkholderia cenocepacia and epithelial respiratory cells

Scientific Reports
Francesca PacelloAndrea Battistoni

Abstract

Previous studies have demonstrated that extracellular glutathione reduces the ability of the Cystic Fibrosis pathogen Burkholderia cenocepacia to infect primary or immortalized epithelial respiratory cells. We report here that the adhesion and invasion ability of B. cenocepacia is limited also by thiol-oxidizing and disulphide-reducing agents and by protein disulfide isomerase (PDI) inhibitors. PDI inhibitors also reduce the proinflammatory response elicited by cells in response to Burkholderia. These findings indicate that a membrane-associated PDI catalyzes thiol/disulphide exchange reactions which favor bacterial infection. The combined use of selective PDI inhibitors, RNA silencing and specific antibodies identified ERp57 as a major PDI involved in the interaction between B. cenocepacia and epithelial cells. This study contributes to the elucidation of the Burkholderia pathogenic mechanisms by showing that this microorganism exploits a membrane-associated host protein to infect epithelial cells and identifies ERp57 as a putative pharmacological target for the treatment of Burkholderia lung infections.

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Citations

Feb 12, 2019·Nature Nanotechnology·Krishna DanYamuna Krishnan
Aug 20, 2017·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Ellyse CipollaRagini Vittal
Jul 21, 2017·Pharmacology & Therapeutics·Aubryanna HettinghouseChuan-Ju Liu
Sep 2, 2021·JACS Au·Quentin LaurentStefan Matile

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PCR
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