Hugh Adler, Daniela M Ferreira, Stephen B Gordon, Jamie Rylance
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引用次数: 29
Abstract
Immunity to pneumococcal infections is impaired in older people, and current vaccines are poorly protective against pneumococcal disease in this population. Naturally acquired immunity to pneumococcal capsular polysaccharides develops during childhood and is robust in young adults but deteriorates with advanced age. In particular, antibody levels and function are reduced in older people. Pneumococcal vaccines are recommended for people >65 years old. However, the benefits of polysaccharide and protein-conjugated vaccines in this population are small, because of both serotype replacement and incomplete protection against vaccine serotype pneumococcal disease. In this review, we overview the immune mechanisms by which naturally acquired and vaccine-induced pneumococcal capsular polysaccharide immunity declines with age, including altered colonization dynamics, reduced opsonic activity of antibodies (particularly IgM), and impaired mucosal immunity.
期刊介绍：
Cessation. First launched as Clinical and Diagnostic Laboratory Immunology (CDLI) in 1994, CVI published articles that enhanced the understanding of the immune response in health and disease and after vaccination by showcasing discoveries in clinical, laboratory, and vaccine immunology. CVI was committed to advancing all aspects of vaccine research and immunization, including discovery of new vaccine antigens and vaccine design, development and evaluation of vaccines in animal models and in humans, characterization of immune responses and mechanisms of vaccine action, controlled challenge studies to assess vaccine efficacy, study of vaccine vectors, adjuvants, and immunomodulators, immune correlates of protection, and clinical trials.
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