title: Peripheral blood lymphocyte imbalance in Koreans with active vitiligo.
abstract: BACKGROUND
  An immune-mediated destruction of melanocytes is the most popular current theory of vitiligo. There have been a few published reports on the assessment of lymphocyte population in vitiligo, and they showed mixed results. The purpose of our investigation was to assess peripheral lymphocyte subpopulations in Koreans with actively spreading vitiligo.
  
  
  METHODS
  Fifty patients with actively spreading vitiligo and 30 normal persons were studied for peripheral blood lymphocyte imbalance using flow cytometry. The percentages of total T-lymphocytes, B-lymphocytes, helper T cells, suppressor T cells, and natural killer cells were evaluated with the use of CD3, CD19, CD4, CD8, and CD16 monoclonal antibodies, respectively.
  
  
  RESULTS
  The mean value of helper T cells showed a significant difference between the two groups with the value being 38.2% in patients and 43.5% in control subjects. Seventeen of the 50 patients showed reversed helper/suppressor T cell ratio, whereas only 1 of 30 control subjects showed reversed ratio. There was a statistically significant difference in the mean percentage of helper T cells and suppressor T cells between generalized vitiligo patients and control subjects. The percentage of B cells in patients with recent onset less than 1 year was higher than control subjects and patients with late onset. The mean percentage of natural killer cells was increased significantly in patients with negative autoantibody test.
  
  
  CONCLUSIONS
  The present data show that immunologic abnormalities, both cellular and humoral, are involved in the pathogenesis of vitiligo.
authors: Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea.
authors: S K
authors: SK
authors: Hann
authors: Y K
authors: YK
authors: Park
authors: K Y
authors: KY
authors: Chung
authors: H I
authors: HI
authors: Kim
authors: S
authors: S
authors: Im
authors: J H
authors: JH
authors: Won
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D002648:Child; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007694:Killer Cells, Natural; D007723:Korea / Q000453:epidemiology; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D016176:T-Lymphocyte Subsets; D006377:T-Lymphocytes, Helper-Inducer; D050378:T-Lymphocytes, Regulatory; D014820:Vitiligo / Q000097:blood* / Q000208:ethnology / Q000276:immunology