title: B-cell numbers in the blood of patients with non-HLA*B8 or non-HLA*B44 common variable immunodeficiency.
abstract: BACKGROUND
  Genetic susceptibility to common variable immunodeficiency (CVID) has been linked to the inheritance of part or all of 2 extended major histocompatibility complex haplotypes: HLA*B8*DR3(17) and HLA*B44*DR7.
  
  
  OBJECTIVE
  To determine whether the inheritance of these major histocompatibility complex susceptibility haplotypes correlates with absolute B-cell numbers.
  
  
  METHODS
  A retrospective medical record review of 55 consecutive patients with CVID whose blood was analyzed for B-cell numbers using a fluorescent-activated cell sorter.
  
  
  RESULTS
  The mean +/- SD absolute count of CD19+ B cells among the 36 patients (65%) with CVID who had inherited HLA*B8 or HLA*B44 was 218 +/- 23 cells/mm3 compared with 119 +/- 27 cells/mm3 in those who had not inherited HLA*B8 or HLA*B44 (P = .008). There were no significant differences in B-cell numbers among the 33 patients (60%) with CVID who had inherited HLA*DR7 or HLA*DR3(17) and those who had not.
  
  
  CONCLUSIONS
  Patients with CVID who inherited HLA*B44 or HLA*B8 tended to have higher numbers of B cells in the blood than those who did not, suggesting that the mechanism of immunodeficiency may differ.
authors.affiliation: Division of Developmental and Clinical Immunology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama 35294-2182, USA.
authors.forename: Douglas T
authors.initials: DT
authors.lastname: Johnston
authors.forename: Harry W
authors.initials: HW
authors.lastname: Schroeder
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D001402:B-Lymphocytes / Q000276:immunology*; D017074:Common Variable Immunodeficiency / Q000097:blood* / Q000235:genetics* / Q000276:immunology; D005260:Female; D015235:HLA-B Antigens / Q000235:genetics*; D059948:HLA-B44 Antigen; D015795:HLA-B8 Antigen / Q000235:genetics*; D006239:Haplotypes; D006801:Humans; D007132:Immunoglobulin Isotypes / Q000097:blood; D018655:Lymphocyte Count; D008297:Male
chemical_list: D015235:HLA-B Antigens; D059948:HLA-B44 Antigen; D015795:HLA-B8 Antigen; D007132:Immunoglobulin Isotypes