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  • Title: Aberrations in T lymphocytes and natural killer cells in vitiligo: a flow cytometric study.
    Author: Halder RM, Walters CS, Johnson BA, Chakrabarti SG, Kenney JA.
    Journal: J Am Acad Dermatol; 1986 May; 14(5 Pt 1):733-7. PubMed ID: 2940268.
    Abstract:
    Twenty-five patients with vitiligo and twenty-five healthy control subjects were evaluated with the use of flow cytometry to compare percentages of peripheral T lymphocytes and natural killer cells. The percentages of total T lymphocytes, helper T cells, suppressor T cells, and natural killer cells were evaluated with the use of OKT3, OKT4, OKT8, and Leu-7 monoclonal antibodies, respectively. Mean total T lymphocytes and helper T cells were markedly depressed; mean natural killer cells were markedly elevated and mean suppressor T cells were moderately elevated in patients with vitiligo in comparison with control subjects. These results indicate that cell-mediated immunity is subject to some defect in regulation in patients with vitiligo. It remains to be determined whether these abnormalities are a direct cause or a result of vitiligo. Antibody-dependent cytotoxicity, utilizing killer cells with recently reported antimelanocyte antibodies found in patients, may be responsible for pigment cell destruction in vitiligo. Helper T cells may be reduced because of low levels or faulty production of T lymphocyte-stimulating factors in patients or because of a serum factor in patients that is toxic to helper T cells. The presence or absence of autoimmune and/or endocrine disease in patients with vitiligo had no effect on lymphocyte populations. There seemed to be a trend toward lower levels of helper T cells in patients having vitiligo for the shortest amount of time. In summary, the data indicate immunologic abnormalities in patients with vitiligo.
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