Characterization of psoriasiform and alopecic skin lesions in HLA-B27 transgenic rats

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Abstract

We have previously reported a multisystem inflammatory, disease in transgenic rat lines with high expression of HLA-B*2705 and human β2 microglobulin. Skin disease in these rats includes two predominant lesions: 1) marked psoriasiform dermatitis of the tail and digits; and 2) progressive alopecia of face, neck, trunk, and extremities. Here we present the results of a systematic survey of these lesions. Tall and digit skin showed psoriasiform hyperplasia of the epidermis associated with parakeratosis, with marked dermal and epidermal inflammation. The alopecic skin showed perifollicular and follicular mononuclear infiltration and increased numbers of atrophic follicles. Immunohistochemical analysis revealed that B27 expression was prominent on keratinocytes in hyperplastic epidermis where lymphocytic infiltrates were prominent, but was absent in the absence of inflammation. In alopecic lesions, B27 was strongly expressed on follicular epithelium and dermal hair papillae associated with mononuclear infiltrates. T cells, both CD8 and CD4, were most prominent in inflammatory lesions and rat MHC-II expression on keratinocytes, and follicular epithelium was dramatically increased. This study suggests that T cell-mediated immune mechanisms participate in development of cutaneous lesions in HLA-B27 transgenic rats.

Original languageEnglish (US)
Pages (from-to)955-964
Number of pages10
JournalAmerican Journal of Pathology
Volume147
Issue number4
StatePublished - 1995

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Transgenic Rats
HLA-B27 Antigen
Skin
Keratinocytes
Epidermis
Epithelium
Parakeratosis
Inflammation
T-Lymphocytes
Alopecia
Dermatitis
Skin Diseases
Hair
Hyperplasia
Tail
Neck
Extremities

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

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title = "Characterization of psoriasiform and alopecic skin lesions in HLA-B27 transgenic rats",
abstract = "We have previously reported a multisystem inflammatory, disease in transgenic rat lines with high expression of HLA-B*2705 and human β2 microglobulin. Skin disease in these rats includes two predominant lesions: 1) marked psoriasiform dermatitis of the tail and digits; and 2) progressive alopecia of face, neck, trunk, and extremities. Here we present the results of a systematic survey of these lesions. Tall and digit skin showed psoriasiform hyperplasia of the epidermis associated with parakeratosis, with marked dermal and epidermal inflammation. The alopecic skin showed perifollicular and follicular mononuclear infiltration and increased numbers of atrophic follicles. Immunohistochemical analysis revealed that B27 expression was prominent on keratinocytes in hyperplastic epidermis where lymphocytic infiltrates were prominent, but was absent in the absence of inflammation. In alopecic lesions, B27 was strongly expressed on follicular epithelium and dermal hair papillae associated with mononuclear infiltrates. T cells, both CD8 and CD4, were most prominent in inflammatory lesions and rat MHC-II expression on keratinocytes, and follicular epithelium was dramatically increased. This study suggests that T cell-mediated immune mechanisms participate in development of cutaneous lesions in HLA-B27 transgenic rats.",
author = "H. Yanagisawa and Richardson, {James A} and Taurog, {Joel D} and Hammer, {Robert E}",
year = "1995",
language = "English (US)",
volume = "147",
pages = "955--964",
journal = "American Journal of Pathology",
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TY - JOUR

T1 - Characterization of psoriasiform and alopecic skin lesions in HLA-B27 transgenic rats

AU - Yanagisawa, H.

AU - Richardson, James A

AU - Taurog, Joel D

AU - Hammer, Robert E

PY - 1995

Y1 - 1995

N2 - We have previously reported a multisystem inflammatory, disease in transgenic rat lines with high expression of HLA-B*2705 and human β2 microglobulin. Skin disease in these rats includes two predominant lesions: 1) marked psoriasiform dermatitis of the tail and digits; and 2) progressive alopecia of face, neck, trunk, and extremities. Here we present the results of a systematic survey of these lesions. Tall and digit skin showed psoriasiform hyperplasia of the epidermis associated with parakeratosis, with marked dermal and epidermal inflammation. The alopecic skin showed perifollicular and follicular mononuclear infiltration and increased numbers of atrophic follicles. Immunohistochemical analysis revealed that B27 expression was prominent on keratinocytes in hyperplastic epidermis where lymphocytic infiltrates were prominent, but was absent in the absence of inflammation. In alopecic lesions, B27 was strongly expressed on follicular epithelium and dermal hair papillae associated with mononuclear infiltrates. T cells, both CD8 and CD4, were most prominent in inflammatory lesions and rat MHC-II expression on keratinocytes, and follicular epithelium was dramatically increased. This study suggests that T cell-mediated immune mechanisms participate in development of cutaneous lesions in HLA-B27 transgenic rats.

AB - We have previously reported a multisystem inflammatory, disease in transgenic rat lines with high expression of HLA-B*2705 and human β2 microglobulin. Skin disease in these rats includes two predominant lesions: 1) marked psoriasiform dermatitis of the tail and digits; and 2) progressive alopecia of face, neck, trunk, and extremities. Here we present the results of a systematic survey of these lesions. Tall and digit skin showed psoriasiform hyperplasia of the epidermis associated with parakeratosis, with marked dermal and epidermal inflammation. The alopecic skin showed perifollicular and follicular mononuclear infiltration and increased numbers of atrophic follicles. Immunohistochemical analysis revealed that B27 expression was prominent on keratinocytes in hyperplastic epidermis where lymphocytic infiltrates were prominent, but was absent in the absence of inflammation. In alopecic lesions, B27 was strongly expressed on follicular epithelium and dermal hair papillae associated with mononuclear infiltrates. T cells, both CD8 and CD4, were most prominent in inflammatory lesions and rat MHC-II expression on keratinocytes, and follicular epithelium was dramatically increased. This study suggests that T cell-mediated immune mechanisms participate in development of cutaneous lesions in HLA-B27 transgenic rats.

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