Authors: Mahmoud Rezk A Hussein Wafaa M AbdelMagid Ramadan Saleh Essam Nada
Publish Date: 2008/09/17
Volume: 15, Issue: 1, Pages: 73-79
Abstract
Allergic contact dermatitis ACD is a cellmediated delayed type IV immunologic reaction Atopic dermatitis AD is a chronic inflammatory skin disease that results from a complex interaction between immunologic genetic and environmental factors Pityriasis rosea PR is a selflimited eruption of unknown etiology Immune cell infiltrate is a constant feature in the inflammatory skin diseases Here we performed phenotypical characterization of the immune cells in ACD AD and PR ten cases each We performed immunohistochemical stains for B cells CD20 T cells CD3 histiocytes CD68 and T cells with cytotoxic activity granzymeB The data were compared with findings in 20 specimens of normal skin The results were scored as mean values of positively stained immune cells Immunohistochemistry showed significantly high counts of immune cells in lesional skin ACD AD and PR compared to the normal one p 005 In the lesional skin the immune cells were composed predominantly of CD3+ T lymphocytes and CD68+ cells histiocytes Some of the CD3+ cells were granzyme B+ The counts of some immune cells CD3+ and CD68+ were high in ACD compared to AD and PR The counts of CD20+ and granzyme B+ cells were high in PR compared to ACD and AD However these differences did not reach the level of statistical significance The present data describe the profile of the immune cell infiltrate in AD ACD and PR The cellmediated immunity seems to have critical role in the development of these lesions
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