title: Spontaneous DNA synthesis in tonsillar lymphocytes and its clinical implications.
abstract: Spontaneous DNA synthesis (SDS) in tonsillar lymphocytes was investigated in 58 cases by [3H]-thymidine incorporation under a certain culture condition without any mitogens. Tonsillar lymphocytes showed an extremely higher uptake of [3H]thymidine than peripheral blood lymphocytes. Cells exhibiting SDS were mainly B cells, but, however, they needed the helper functions of T cells and glass-adherent cells to synthesize DNA. SDS in tonsillar lymphocytes decreased with age and was lowest in the 21-30 year age group. SDS in cases with complications such as chronic sinusitis, nasal allergy or secretory otitis media was significantly higher than that in cases with no complications.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004247:DNA / Q000096:biosynthesis*; D005260:Female; D006801:Humans; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010033:Otitis Media / Q000276:immunology; D014066:Palatine Tonsil / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D012130:Respiratory Hypersensitivity / Q000276:immunology; D012397:Rosette Formation; D012852:Sinusitis / Q000276:immunology
chemical_list: D004247:DNA