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van Linge, Christine C A; Hulme, Katina D; Peters-Sengers, Hessel; Sirard, Jean-Claude; Goessens, Wil H F; de Jong, Menno D; Russell, Colin A; de Vos, Alex F; van der Poll, Tom
International journal of molecular sciences, 12/2023, Letnik: 25, Številka: 1Journal Article
Pneumonia caused by multi-drug-resistant (MDR- ) poses a major public health threat, especially to immunocompromised or hospitalized patients. This study aimed to determine the immunostimulatory effect of the Toll-like receptor 5 ligand flagellin on primary human lung epithelial cells during infection with MDR- . Human bronchial epithelial (HBE) cells, grown on an air-liquid interface, were inoculated with MDR- on the apical side and treated during ongoing infection with antibiotics (meropenem) and/or flagellin on the basolateral and apical side, respectively; the antimicrobial and inflammatory effects of flagellin were determined in the presence or absence of meropenem. In the absence of meropenem, flagellin treatment of MDR- -infected HBE cells increased the expression of antibacterial defense genes and the secretion of chemokines; moreover, supernatants of flagellin-exposed HBE cells activated blood neutrophils and monocytes. However, in the presence of meropenem, flagellin did not augment these responses compared to meropenem alone. Flagellin did not impact the outgrowth of MDR- . Flagellin enhances antimicrobial gene expression and chemokine release by the MDR- -infected primary human bronchial epithelium, which is associated with the release of mediators that activate neutrophils and monocytes. Topical flagellin therapy may have potential to boost immune responses in the lung during pneumonia.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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