Cited by 170T-cell and B-cell ImmunologyHematopoietic Stem Cell TransplantationLymphoma Diagnosis and Treatment

B Cell Maintenance in Aged Mice Reflects Both Increased B Cell Longevity and Decreased B Cell Generation

Kline, Gregory H, Hayden, Tracy A, Klinman, Norman R·1999·The Journal of Immunology

Abstract

In aged mice the population of mature peripheral B cells is maintained despite a severalfold decrease in the population of bone marrow B cell progenitors. The analysis of the rate of accumulation of 5′-bromo-2-deoxyuridine (BrdU)-labeled splenic B cells in mice fed BrdU for 8 days to 8 wk demonstrated a severalfold increase in the half-life of mature B cells in aged mice. Consistent with a role for decreased B cell turnover in maintaining the mature B cell population of aged mice, several findings indicate that fewer newly generated B cells enter the spleen from the bone marrow in aged vs young adult mice. These include 1) a fourfold decrease in the population of relatively immature splenic B cells, defined as cells that express high levels of heat-stable Ag and accumulate BrdU within 8 wk of labeling; and 2) an equivalent decrease in the population of bone marrow cells representative of later stages of B cell maturation (sIgD−sIgMint-high). Surprisingly, despite a four- to sixfold decrease in pre-B cells, the population of least mature bone marrow B cells (IgD−sIgMvery low) remains intact. Because this population accumulates BrdU-labeled cells more slowly in aged mice than in younger mice, and bone marrow B cells at more mature developmental stages are diminished, it appears that in aged mice B cell development beyond the sIgMvery low stage may be retarded and that cells, therefore, accumulate within this population.

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Crossref · 10.4049/jimmunol.162.6.3342

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Authors
Kline, G. H., Hayden, T. A., & Klinman, N. R.
Affiliations
Scripps Research Institute (US)
Venue
The Journal of Immunology
Published
1999-03
Volume
162
Issue
6
Pages
3342-3349
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2156242308
Cited by
170
References
48
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 3 · 2022: 3 · 2021: 5 · 2020: 6 · 2019: 9 · 2018: 3 · 2017: 6 · 2016: 3 · 2015: 5 · 2014: 3 · 2013: 5 · 2012: 9
FWCI
1.94
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (P01AG001743, T32AG000080, AG-01743, T32 AG-00080)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
Keywords
B cell aging, splenic B cells, B cell maturation, pre-B cells, CD24, BrdU labeling, immunosenescence
MeSH terms
Aging, Animals, B-Lymphocytes, Bone Marrow Cells, Bromodeoxyuridine, Cell Cycle, Cell Differentiation, Cell Survival, Immunoglobulin M, Lymphocyte Activation, Receptors, Antigen, B-Cell, Spleen, Stem Cells, Cell Lineage, Mice

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