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Clin Immunol. 2018 Aug;193:80-87. doi: 10.1016/j.clim.2018.02.003. Epub 2018 Feb 6.

Diminished antibody response to influenza vaccination is characterized by expansion of an age-associated B-cell population with low PAX5.

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Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, IL, USA.
Department of Immunobiology and the Arizona Center on Aging, University of Arizona College of Medicine, Tucson, AZ, USA.
Department of Family Medicine, Rush University Medical Center, Chicago, IL, USA; Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA.
Geriatric Research, Education, and Clinical Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA; Department of Internal Medicine, Case Western Reserve University, Cleveland, OH, USA.
Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, IL, USA. Electronic address:


Individuals over the age of 65 comprise a substantial portion of the world population and become more susceptible to vaccine-preventable infections with age as vaccination response diminishes. The underlying reason for this impaired vaccine response in older individuals is not entirely clear. We evaluated potential differences in phenotypic and functional responses of B cells from healthy younger (22-45years) and older (64-95years) individuals that may associate with a diminished antibody response to influenza vaccination. We report that age is associated with expansion of atypical memory B cells (CD10-CD20+CD21-CD27-) and an age-associated B cell (ABC, CD21-T-bet+CD11c+) phenotype. Reduced expression of PAX5 was also seen in older individuals. Poor influenza-specific antibody production following vaccination was associated with low PAX5 expression and a distinct composition of the ABC compartment. Collectively, these findings demonstrate that the characteristics of the ABC populations of older individuals are associated with antibody production following influenza vaccination.

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