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Inducing Meningococcal Meningitis Serogroup C in Mice via Intracisternal Delivery
Published on: November 5, 2019
Development of new vaccines against meningococcal disease
1Chiron Vaccines, Chiron Behring GmbH & Co. KG, Post Box 1630, 35006 Marburg, Germany. Michael_Broeker@Chiron.com
Abstract:
Meningococcal diseases continue to have a major public health impact in many countries. Five major groups of Neisseria meningitidis (A, B, C, Y and W135) are responsible for most meningoccocal diseases. Plain polysaccharides vaccines for Nelsseria meningitidis groups A, C, Y and W-135 have been in use for approximately 20 years, both to prevent invasive disease in high-risk population and to control disease outbreaks. However, these conventional meningococcal vaccines induce a relatively short-lasting T-cell independent immune response, are not effective in children under two years of age and can induce hyporesponsiveness. New meningococcal group C conjugate vaccines have since been developed, which offer solid advantages over the currently licensed plain polysaccharide vaccines. There is still no vaccine available against the serogroup B, which is a major cause of invasive disease. This report summarises the different approaches to the development of vaccines against the pathogenic meningococci.
Insights
Meningococcal vaccines target five Neisseria meningitidis groups. Current vaccines have limitations, prompting research into new conjugate vaccines, especially for serogroup B, a significant invasive disease cause.
Area of Science:
- Microbiology
- Immunology
- Vaccinology
Background:
- Meningococcal diseases pose a significant public health threat globally.
- Neisseria meningitidis serogroups A, B, C, Y, and W-135 cause the majority of invasive meningococcal disease.
- Conventional polysaccharide vaccines offer limited efficacy in young children and short-lived immunity.
Purpose of the Study:
- To review current and emerging vaccine development strategies for pathogenic Neisseria meningitidis.
- To highlight the limitations of existing meningococcal vaccines.
- To address the unmet need for a serogroup B vaccine.
Main Methods:
- Review of existing literature on meningococcal vaccines.
- Analysis of polysaccharide and conjugate vaccine technologies.
- Discussion of novel vaccine approaches.
Main Results:
- Plain polysaccharide vaccines (MPSV) against serogroups A, C, Y, and W-135 have been used for decades.
- Conjugate vaccines for meningococcal group C (MenCC) demonstrate improved immunogenicity and efficacy.
- No licensed vaccine currently exists for Neisseria meningitidis serogroup B, a leading cause of invasive disease.
Conclusions:
- Advances in conjugate vaccine technology have improved protection against certain meningococcal serogroups.
- Development of an effective serogroup B meningococcal vaccine remains a critical public health priority.
- Continued research into novel vaccine platforms is essential to combat meningococcal disease globally.
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