Relative stability of meningococcal serogroup A and X polysaccharides

Berti, F. and Romano, M. R. and Micoli, F. and Pinto, V. and Cappelletti, E. and Gavini, M. and Proietti, D. and Pluschke, G. and MacLennan, C. A. and Costantino, P.. (2012) Relative stability of meningococcal serogroup A and X polysaccharides. Vaccine : the official journal of the International Society for Vaccines, 30. pp. 6409-6415.

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Official URL: http://edoc.unibas.ch/dok/A6094339

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Prior to the introduction of the MenAfriVac? serogroup A glycoconjugate vaccine in September 2010, serogroup A was the major epidemic disease-causing meningococcal serogroup in the African meningitis belt. However, recently serogroup X meningococcal (MenX) disease has received increased attention because of outbreaks recorded in this region, with increased endemic levels of MenX disease over the past 2 years. Whereas polysaccharide-protein conjugate vaccines against meningococcal serogroups A, C, W and Y (MenA, MenC, MenW, MenY) are on the market, a vaccine able to protect against MenX has never been achieved. The structure of serogroup A, C, W and Y meningococcal polysaccharides has been already fully elucidated by NMR. MenX capsular polysaccharide (MenX CPS) structure is also documented but fewer characterization data have been published. We have applied here (1)H NMR, (31)P NMR and HPLC to evaluate the stability of MenX CPS in aqueous solution as compared to MenA capsular polysaccharide (MenA CPS). The stability study demonstrated that MenA CPS is more susceptible to hydrolytic degradation than MenX CPS. The different stereochemistry of the N-acetyl group at position C(2) of mannosamine (MenA CPS) and glucosamine (MenX CPS) respectively might play a fundamental role in this susceptibility to polysaccharide chain degradation. The satisfactory stability of MenX CPS predicts the possibility that a stable fully-liquid MenX polysaccharide or glycoconjugate vaccine could be developed.
Faculties and Departments:09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Medical Parasitology and Infection Biology (MPI) > Molecular Immunology (Pluschke)
UniBasel Contributors:Pluschke, Gerd
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:03 May 2018 10:23
Deposited On:19 Jul 2013 07:42

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