Cited by 229T-cell and B-cell ImmunologyImmune responses and vaccinationsImmunodeficiency and Autoimmune Disorders

Regulation of Aged Humoral Immune Defense against Pneumococcal Bacteria by IgM Memory B Cell

Open access
Shi, Yuhui, Yamazaki, Takashi, Okubo, Yoshio, Uehara, Yoshio, Sugane, Kazuo, Agematsu, Kazunaga·2005·The Journal of Immunology

Abstract

Elderly persons have a high incidence of lethal infections by encapsulated bacteria. However, mechanisms involved in their poor defense and maintenance of immunological memory have been poorly understood. The present study characterized the population of B cells known as IgM memory B cell compartment and their response by pneumococcal vaccine in elderly people. CD27+ memory B cells, particularly IgD+IgM+CD27+ IgM memory B cells, had dramatically declined in the aged. Their Ig syntheses by B cells and the differentiation into plasma cells were diminished in vitro compared with those in adults. A rise of anti-pneumococcal IgM in sera of elderly persons was found with lower levels compared with those in adults after pneumococcal vaccination. Although diminished function itself of aged B cells surely exist, decline of the IgM memory B cell pool is expected to result in a poor humoral immunity against pneumococcal infection in elderly people.

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Crossref · 10.4049/jimmunol.175.5.3262

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  • The decline in human B cell number is likely due to fewer IgM+ memory and switched memory B cells, because total naive B cells remain unchanged by aging.

    “This decline is likely due to decreased numbers of IgM + memory and switched memory B cells, because the total number of naive B cells remains unchanged by aging (51,52).”

    From Causes, consequences, and reversal of immune system aging (2013) · cites this paper as [52]

  • The percentage of switched memory B cells decreases with age.

    “Using these markers, it has been shown that the percentage of switched memory B cells, the predictors of optimal antibody responses [114], decreases with age [115, 116].”

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Authors
Shi, Y., Yamazaki, T., Okubo, Y., Uehara, Y., Sugane, K., & Agematsu, K.
Affiliations
  • Shinshu University (JP)
  • Department of Infectious Immunology, Graduate School of Medicine , Matsumoto ,
  • Kochi Medical School Hospital (JP)
Venue
The Journal of Immunology
Published
2005-09-01
Volume
175
Issue
5
Pages
3262-3267
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1539270061
Cited by
229
References
37
Citations by year
2026: 4 · 2025: 6 · 2024: 9 · 2023: 6 · 2022: 8 · 2021: 11 · 2020: 10 · 2019: 10 · 2018: 12 · 2017: 12 · 2016: 9 · 2015: 21 · 2014: 12 · 2013: 24 · 2012: 16
FWCI
2.25
Type
journal article
Language
en
Open access
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Life Sciences › Immunology and Microbiology › Immunology › Immunodeficiency and Autoimmune Disorders
Keywords
IgM memory B cells, aging, humoral immunity, pneumococcal infection, Streptococcus pneumoniae, pneumococcal vaccine, CD27+ memory B cells, immunosenescence, immunological memory, plasma cell differentiation, antibody production, encapsulated bacteria
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Antibodies, Bacterial, Antibody Formation, B-Lymphocytes, Female, Humans, Immunoglobulin D, Immunoglobulin M, Immunologic Memory, Male, Middle Aged, Streptococcus pneumoniae, Tumor Necrosis Factor Receptor Superfamily, Member 7, Pneumococcal Vaccines

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