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1996-02-27
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Document 0671
DOCN M9630671
TI Immediate-type hypersensitivity response followed by a late reaction is
induced by repeated epicutaneous application of contact sensitizing
agents in mice.
DT 9603
AU Kitagaki H; Fujisawa S; Watanabe K; Hayakawa K; Shiohara T; Department
of Dermatology, Kyorin University School of Medicine,; Tokyo, Japan.
SO J Invest Dermatol. 1995 Dec;105(6):749-55. Unique Identifier : AIDSLINE
MED/96086840
AB Repeated administration of antigen often leads to consequences different
from those expected with fewer encounters with the antigen, but little
attention has been paid to the effects of repeated epicutaneous
application of antigens. To investigate whether repeated epicutaneous
application of a contact-sensitizing agent that is generally thought to
evoke a typical delayed-type hypersensitivity response could result in
adverse or different consequences, BALB/c mice were sensitized with
2,4,6-trinitro-1-chlorobenzine and then were repeatedly elicited on the
original sensitized site with the same antigen for 24-48 d. Detailed
analyses showed that the time-course of antigen-specific
hypersensitivity responses shifted from a delayed-type hypersensitivity
to an immediate-type response followed by a late reaction as
epicutaneous applications were repeated, a finding different from that
previously reported. Development of these hypersensitivity responses was
antigen specific, and this shift was associated with epidermal
hyperplasia, accumulation of large numbers of mast cells and CD4+ T
cells beneath the epidermis, and elevated serum levels of
antigen-specific IgE. The immediate-type response to
2,4,6-trinitro-1-chlorobenzine was also induced in
2,4,6-trinitro-1-chlorobenzine-treated, genetically mast cell-deficient
W/Wv mice that contained significant numbers of mast cells, but not in
similarly treated S1/S1d mice devoid of mast cells. Our experimental
system would provide a simple, reproducible animal model for chronic
skin inflammation induced by various antigens.
DE Animal CD4-Positive T-Lymphocytes/PHYSIOLOGY Dermatitis,
Contact/*ETIOLOGY Hypersensitivity, Immediate/*ETIOLOGY
IgE/BIOSYNTHESIS Male Mast Cells/PHYSIOLOGY Mice Mice, Inbred BALB C
Picryl Chloride/IMMUNOLOGY Support, Non-U.S. Gov't Th2
Cells/PHYSIOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).