Adherence of Lactobacillus salivarius to HeLa Cells Promotes Changes in the Expression of the Genes Involved in Biosynthesis of Their Ligands

The attachment of a variety of to the mucosal surfaces is accomplished through the interaction of OppA, a superficial bacterial protein also involved in oligopeptide internalization, and the glycosaminoglycan moiety of the proteoglycans that form the epithelial cell glycocalyx. Upon the interaction...

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Bibliographic Details
Published in:Frontiers in immunology 2020-01, Vol.10, p.3019-3019
Main Authors: Martín, Carla, Fernández-Vega, Iván, Suárez, Juan E, Quirós, Luis M
Format: Article
Language:English
Subjects:
bacterial adherence
glycosaminoglycan
heparan sulfate
Immunology
Lactobacillus
OppA
proteoglycan
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Summary:The attachment of a variety of to the mucosal surfaces is accomplished through the interaction of OppA, a superficial bacterial protein also involved in oligopeptide internalization, and the glycosaminoglycan moiety of the proteoglycans that form the epithelial cell glycocalyx. Upon the interaction of the vaginal isolate Lv72 and HeLa cell cultures, the expression of increased more than 50-fold over the following 30 min, with the overexpression enduring, albeit at a lower rate, for up to 24 h. Conversely, transcriptional analysis of 62 genes involved in proteoglycan biosynthesis revealed generalized repression of genes whose products catalyze different steps of the whole pathway. This led to decreases in the superficial concentration of heparan (60%) and chondroitin sulfate (40%), although the molecular masses of these glycosaminoglycans were higher than those of the control cultures. Despite this lowering in the concentration of the receptor, attachment of the proceeded, and completely overlaid the underlying HeLa cell culture.
ISSN:1664-3224
1664-3224
DOI:10.3389/fimmu.2019.03019