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Chapter category: Immunology

Challenges and Opportunities in the Development of New Conjugate Vaccines Against Infectious Diseases

This chapter appears in the following book:

Immunobiology of Carbohydrates

Edited by: Simon Y.C. Wong and Gemma Arsequell
ISBN: 0-306-47844-7
» Get more information about this book at landesbioscience.com «

Chapter authors:
P. Moingeon, M. Moreau and A.A. Lindberg


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Chemical conjugation between capsular polysaccharides (CPS) or lipopolysaccharides (LPS) and carrier proteins represents a powerful means to create vaccines targeting bacterial carbohydrate antigens with increased immunogenicity. Using such conjugate vaccines, infections against Haemophilus influenza type b, Streptococcus pneumoniae and Neisseria meningitidis type C can be successfully controlled. Additional conjugate vaccines targeting multiple serotypes of N. meningitidis, Salmonella typhi, and Staphylococcus aureus have entered clinical efficacy trials. In this chapter, we discuss recent developments in targeting other infectious pathogens, searching for new carrier proteins, and improving conjugation methods. We also review some of the challenges associated with the development of conjugate vaccines, including issues linked with product characterization, and the need to incorporate multiple polysaccharides (PS) to cover against several serotypes for a given pathogen. In addition, both the phenomenon of epitopic suppression as well as the theoretical risk that long-term vaccination may facilitate capsular switching or serotype replacements have to be taken into consideration.

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