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1996-02-26
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Document 0718
DOCN M9620718
TI Cutaneous immunopathology of cyclosporin-A-induced autoimmunity in the
rat.
DT 9602
AU Damoiseaux JG; Beijleveld LJ; van Breda Vriesman PJ; Department of
Immunology, University of Limburg, Maastricht, The; Netherlands.
SO Clin Immunol Immunopathol. 1995 Dec;77(3):315-23. Unique Identifier :
AIDSLINE MED/96080360
AB Syngeneic bone marrow transplantation following lethal X-irradiation and
subsequent administration of cyclosporin A (CsA) results after cessation
of CsA treatment in an autoimmune disease which is thymus dependent and
resembles graft-versus-host disease. The chronic dermal changes of this
experimental autoimmune model have similarities with human scleroderma
in terms of skin histopathology. In this study we evaluated the possible
role of different effector leukocytes in the rat model of CsA-induced
autoimmunity (CsA-AI) by examining the skin by immunohistology. In the
acute phase both CD4+ and CD8+ TCR alpha beta + T-cells together with
activated ED1+ macrophages and class II MHC-upregulated keratinocytes
were seen in the epidermis; no selective use of TCR V beta was observed.
Few TCR alpha beta + T-cells were seen in the dermis where CD4+ ED2+
macrophages were abundant. With the change from acute to chronic,
scleroderma-like lesions the CD4+ T-cells disappeared from the epidermis
and the TCR alpha beta + cells were now almost exclusively CD8+; both
class II MHC-upregulated keratinocytes and macrophages persisted.
Changes in TCR gamma delta + T-cells were not observed in the acute or
chronic phase. As a possible effector mechanism CD4+ T-cells in the
acute-phase of CsA-AI may cause the observed activation of macrophages
and keratinocytes. Furthermore, CD4+ T-cells may be necessary for the
homing of the CD8+ T-cells in the epidermis. Especially the activated
keratinocytes are suspected of being the target cells which may
perpetuate the ongoing autoimmune response into the chronic phase as
established by CD8+ T-cells only.
DE Animal Antibodies, Monoclonal/IMMUNOLOGY Autoimmune
Diseases/*CHEMICALLY INDUCED/PATHOLOGY Bone Marrow Transplantation
Cyclosporine/*TOXICITY CD4-Positive T-Lymphocytes/IMMUNOLOGY
CD8-Positive T-Lymphocytes/IMMUNOLOGY Female Histocompatibility
Antigens Class II/IMMUNOLOGY Immunoenzyme Techniques
Macrophages/IMMUNOLOGY Rats Rats, Inbred Lew Receptors, Antigen,
T-Cell, alpha-beta/IMMUNOLOGY Receptors, Antigen, T-Cell,
gamma-delta/IMMUNOLOGY Skin/IMMUNOLOGY/*PATHOLOGY Skin
Diseases/IMMUNOLOGY/*PATHOLOGY Specific Pathogen-Free Organisms
Support, Non-U.S. Gov't Thymectomy JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).