Immunohistochemical detection of proliferation and differentiation in discoid lupus erythematosus.

Abstract:

:Discoid lupus erythematosus lesions show hyperkeratosis and atrophy, which may reflect abnormal epidermal proliferation, differentiation, or both. In this investigation, markers for epidermal proliferation, differentiation and inflammation were studied in cutaneous lesions of discoid lupus erythematosus. Frozen sections of biopsy specimens from 20 patients were examined immunohistochemically regarding Ki-67 staining and keratin 16 expression (parameters for proliferation), and the expression of keratin 10, involucrin, and filaggrin (parameters for differentiation). The inflammatory infiltrate was characterized with the use of antibodies against T lymphocytes, monocytes/macrophages, and Langerhans cells. With these markers, epidermal proliferation was found to be increased in discoid lupus erythematosus. Keratin 10 expression, a marker for early differentiation, showed the pattern of normal skin. Involucrin and filaggrin, markers for terminal differentiation, were expressed already in the lower part of the stratum spinosum, whereas in normal skin these markers were restricted to the stratum granulosum and the upper layers of the stratum spinosum, and the stratum granulosum and stratum corneum, respectively. Infiltrate analysis revealed the well-established picture. We conclude that in cutaneous lesions of discoid lupus erythematosus, hyperproliferation is combined with normal early differentiation and premature terminal differentiation of keratinocytes.

journal_name

J Am Acad Dermatol

authors

de Jong EM,van Erp PE,Ruiter DJ,van de Kerkhof PC

doi

10.1016/0190-9622(91)70303-j

subject

Has Abstract

pub_date

1991-12-01 00:00:00

pages

1032-8

issue

6 Pt 1

eissn

0190-9622

issn

1097-6787

pii

0190-9622(91)70303-J

journal_volume

25

pub_type

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