Abstract
Analysis of expression of CD38, CD45R (B220), IgM and IgD on splenic B lymphocytes from mice of different ages demonstrated CD38 on both immature (B220(+), BCR(-)) and mature (B220(+), BCR(+)) B lymphocytes. Similarly, CD38 is expressed as early as B220 on the surface of progenitor B cells in the bone marrow. In spite of expressing of CD38 and IgM, neonatal B cells, in contrast to the adult, failed to proliferate to either anti-CD38 or anti-IgM cross-linking when IL-4 was present. They did, however, respond to LPS and anti-CD40, and by 2 weeks of age they began to respond to anti-CD38 and anti-IgM, reaching adult B cell levels by 4 weeks. Although the distribution of CD38 on adult B cells from most different lymphoid compartments was broadly similar, significantly higher levels of CD38 were expressed on peritoneal B lymphocytes. A detailed analysis, using IgM / IgD ratio and staining with anti-CD5 confirmed that B1 lymphocytes were expressing a high level of CD38. Interestingly, both immature B cells and peritoneal B1 lymphocytes were unresponsive to anti-CD38. However, they were activated by LPS or anti-CD40.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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ADP-ribosyl Cyclase
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ADP-ribosyl Cyclase 1
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Aging / immunology
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Animals
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Antibodies
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Antigens, CD*
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Antigens, Differentiation / analysis
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Antigens, Differentiation / immunology
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Antigens, Differentiation / metabolism*
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B-Lymphocytes / cytology
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B-Lymphocytes / immunology*
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B-Lymphocytes / metabolism*
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Bone Marrow Cells / immunology
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Bone Marrow Cells / metabolism
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CD40 Antigens / immunology
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Cell Differentiation
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Cell Division
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Female
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Flow Cytometry
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Immunoglobulin D / analysis
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Immunoglobulin D / immunology
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Immunoglobulin M / analysis
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Immunoglobulin M / immunology
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Lipopolysaccharides / immunology
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Lymphocyte Activation
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Membrane Glycoproteins
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Mice
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Mice, Inbred BALB C
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Mice, Inbred C3H
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Mice, Inbred C57BL
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NAD+ Nucleosidase / analysis
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NAD+ Nucleosidase / immunology
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NAD+ Nucleosidase / metabolism*
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Peritoneal Cavity / cytology
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Peyer's Patches / immunology
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Receptor Aggregation
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Spleen / immunology
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Stem Cells / cytology
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Stem Cells / immunology
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Stem Cells / metabolism
Substances
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Antibodies
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Antigens, CD
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Antigens, Differentiation
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CD40 Antigens
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Immunoglobulin D
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Immunoglobulin M
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Lipopolysaccharides
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Membrane Glycoproteins
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ADP-ribosyl Cyclase
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Cd38 protein, mouse
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NAD+ Nucleosidase
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ADP-ribosyl Cyclase 1