title: B memory cells in the thymus: part of the pool of potentially circulating memory cells.
abstract: Immunization of mice with sheep red blood cells (SRBC) or Escherichia coli lipopolysaccharide (LPS) induces the appearance of B memory cells in the thymus. In this paper the origin of these B memory cells was investigated. Therefore, mice primed with either SRBC or LPS 6 months previously and nonprimed mice were joined for parabiosis. Four weeks later the parabiotic mice were separated from each other. Another 3 weeks later thymus cells from the primed and nonprimed mice were transferred separately into lethally irradiated mice in order to determine the adoptive PFC response. It was found that the 4-week period of parabiosis could account for the appearance of a distinct population of B memory cells in the thymus of the nonprimed mice. This result suggest that the B memory cells which appear in the thymus belong to the pool of potentially circulating memory cells.
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial; D001402:B-Lymphocytes / Q000276:immunology*; D002465:Cell Movement; D004926:Escherichia coli / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007156:Immunologic Memory; D008070:Lipopolysaccharides / Q000276:immunology; D008198:Lymph Nodes / Q000276:immunology; D051379:Mice; D010227:Parabiosis; D013154:Spleen / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008070:Lipopolysaccharides