title: Hepatitis B virus-associated antigen deposition in renal tissue from patients with systemic lupus erythematosus.
abstract: OBJECTIVE
  To determine the significance of hepatitis B virus (HBV)-associated antigen deposition in renal tissue from patients with systemic lupus erythematosus (SLE).
  
  
  METHODS
  The medical records of 166 inpatients with lupus nephritis and 384 controls without SLE were analyzed retrospectively. Patients with SLE were classified as positive or negative depending on whether HBV-associated antigen deposition was detected in renal biopsies.
  
  
  RESULTS
  HBV-associated antigen deposition was mainly detected in renal tissue from patients with SLE (50.6%), primary renal glomerular disease (20.8%), and allergic purpura (21.7%). It was not detected in renal tissue from patients with diabetic nephropathy, hypertensive nephrosclerosis, thin basement membrane nephropathy, or Alport syndrome. Hepatitis B surface antigen and core antigen were deposited in the mesangial region and vascular loops. The positive group had a significantly higher frequency of IgG, IgA, and IgM deposition than the negative group (53.6% vs 30.5%; p < 0.01). There was no significant difference in the types of lupus nephritis observed between the 2 groups.
  
  
  CONCLUSIONS
  There was a high prevalence of HBV-associated antigen deposition in renal tissue of patients with SLE by indirect immunofluorescence, which may result mainly from the cross-reactivity with deposited immunoglobulins.
authors.affiliation: Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China.
authors.forename: Zhuolong
authors.initials: Z
authors.lastname: Wang
authors.forename: Mengtao
authors.initials: M
authors.lastname: Li
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Zeng
authors.forename: Xinjian
authors.initials: X
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology / Q000276:immunology* / Q000473:pathology*; D006801:Humans; D007668:Kidney / Q000378:metabolism / Q000473:pathology / Q000821:virology*; D008180:Lupus Erythematosus, Systemic / Q000453:epidemiology / Q000473:pathology / Q000821:virology*; D008181:Lupus Nephritis / Q000453:epidemiology / Q000473:pathology / Q000821:virology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D055815:Young Adult