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Modifications of Bordetella bronchiseptica core lipopolysaccharide influence immune response without affecting protective activity.
- Source :
-
Bioorganic & medicinal chemistry letters [Bioorg Med Chem Lett] 2017 Feb 01; Vol. 27 (3), pp. 432-436. Date of Electronic Publication: 2016 Dec 21. - Publication Year :
- 2017
-
Abstract
- Bordetella bronchiseptica produces respiratory disease primarily in mammals including humans. Although a considerably amount of research has been generated regarding lipopolysaccharide (LPS) role during infection and stimulating innate and adaptive immune response, mechanisms involved in LPS synthesis are still unknown. In this context we searched in B. bronchiseptica genome for putative glycosyltransferases. We found possible genes codifying for enzymes involved in sugar substitution of the LPS structure. We decided to analyse BB3394 to BB3400 genes, closed to a previously described LPS biosynthetic locus in B. pertussis. Particularly, conservation of BB3394 in sequenced B. bronchiseptica genomes suggests the importance of this gene for bacteria normal physiology. Deletion of BB3394 abolished resistance to naive serum as described for other LPS mutants. When purified LPS was analyzed, differences in the LPS core structure were found. Particularly, a GalNA branched sugar substitution in the core was absent in the LPS obtained from BB3394 deletion mutant. Absence of GalNA in core LPS alters immune response in vivo but is able to induce protective response against B. bronchiseptica infection.<br /> (Copyright © 2016. Published by Elsevier Ltd.)
- Subjects :
- Animals
Bacterial Proteins genetics
Bacterial Proteins metabolism
Bordetella bronchiseptica genetics
Bordetella bronchiseptica immunology
Genes, Bacterial
Glycosyltransferases genetics
Glycosyltransferases metabolism
Immune System metabolism
Lipopolysaccharides chemistry
Lipopolysaccharides immunology
Mice
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Bordetella bronchiseptica metabolism
Lipopolysaccharides biosynthesis
Subjects
Details
- Language :
- English
- ISSN :
- 1464-3405
- Volume :
- 27
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Bioorganic & medicinal chemistry letters
- Publication Type :
- Academic Journal
- Accession number :
- 28040392
- Full Text :
- https://doi.org/10.1016/j.bmcl.2016.12.049