title: [Abnormal percentage of memory B cells in tonsils and peripheral blood in clinical progression of IgA nephropathy].
abstract: OBJECTIVE
  To observe an abnormal expression of humoral immune response induced by memory B cells in tonsils and peripheral blood of patients with IgA nephropathy (IgAN), the variation of memory B cells after tonsillectomy, and to discover the role of tonsillectomy in IgAN.
  
  
  METHODS
  In the study, 28 patients were diagnosed as IgAN via renal biopsy, and 27 patients suffering from chronic tonsillitis without nephritis and 10 normal human beings were selected as controls. The expression of memory B cells in the tonsils and peripheral blood was tested by flow cytometry, and the same method was used to test the variation of the expression of memory B cells in peripheral blood of patients with IgAN after tonsillectomy.
  
  
  RESULTS
  In this study, higher percentages of memory B cells were observed in tonsil and peripheral blood of IgAN patients, which were 5.72%±5.26%, 4.92%±5.10%. After tonsillectomy, the percentage of memory B cells was 1.10%±0.65%, lower than that before tonsillectomy (P<0.05). Meanwhile, in tonsils and peripheral blood, the percentage of memory B cells varied with the variation of the urinary findings of the IgAN patients.
  
  
  CONCLUSIONS
  The percentage of memory B cell in tonsils and peripheral blood could predict disease progression of IgAN to a certain extent.
authors.affiliation: Renal Division, The Sencond Xiangya Hospital of Central South University, Kidney Research Institute of Central South University, Changsha 410011, China; Renal Division, Northern Jiangsu People's Hospital, Clinical Medical School of Yangzhou University, Jiangsu Yangzhou 225001, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Wu
authors.affiliation: Renal Division, The Sencond Xiangya Hospital of Central South University, Kidney Research Institute of Central South University, Changsha 410011, China.
authors.forename: You-ming
authors.initials: YM
authors.lastname: Peng
authors.affiliation: Renal Division, Northern Jiangsu People's Hospital, Clinical Medical School of Yangzhou University, Jiangsu Yangzhou 225001, China.
authors.forename: Dao-liang
authors.initials: DL
authors.lastname: Xu
authors.affiliation: Renal Division, Northern Jiangsu People's Hospital, Clinical Medical School of Yangzhou University, Jiangsu Yangzhou 225001, China.
authors.forename: Chang-hua
authors.initials: CH
authors.lastname: Liu
mesh_terms: D016175:B-Lymphocyte Subsets / Q000276:immunology*; D016022:Case-Control Studies; D002908:Chronic Disease; D018450:Disease Progression; D005434:Flow Cytometry; D005922:Glomerulonephritis, IGA / Q000503:physiopathology*; D006801:Humans; D014066:Palatine Tonsil / Q000166:cytology* / Q000276:immunology; D014068:Tonsillectomy; D014069:Tonsillitis