[Beta-2-microglobulin expression in oral lichen planus].

Abstract

In 15 patients suffering from oral lichen planus (OLP), we took biopsies of both involved and noninvolved oral mucosa. The specimens were immunohistochemically studied with regard to the expression of beta-2-microglobulin (beta 2-M). In contrast to noninvolved mucosa, we proved definite beta 2-M expression in keratinocytes from OLP lesions. Our findings agree with the assumption that an autoimmunological process is involved in the pathogenesis of OLP.