B-cell activation by lipopolysaccharide. Distinct pathways for induction of mitosis and antibody production
- PMID: 303685
- PMCID: PMC2181908
- DOI: 10.1084/jem.146.6.1640
B-cell activation by lipopolysaccharide. Distinct pathways for induction of mitosis and antibody production
Abstract
The role played by macrophages in two effects of lipopolysaccharide (LPS) on the immune system of the mouse-substitution for helper T cells and induction of B-cell mitosis-has been investigated. C3H/HeJ mice are unresponsive and do not produce (as other strains do) antibody to 2,4,6-trinitrophenol (TNP) conjugated with autologous mouse erythrocytes (MRBC-TNP) in the presence of LPS. We found that C3H/HeJ spleen cells produce antibody to MRBC-TNP when (a) LPS and macrophages from LPS-responsive C3HeB/FeJ mice or (b) tumor necrosis serum ([TNS] induced by LPS in responsive mice) are added. The mitotic response was not restored. The findings suggest that adjuvanticity and mitogenicity represent distinct pathways of B-cell activation by LPS, subject to different regulatory mechanisms.
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