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1996-02-27
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Document 0706
DOCN M9630706
TI Major histocompatibility complex class I-restricted CD8+ T cells and
class II-restricted CD4+ T cells, respectively, mediate and regulate
contact sensitivity to dinitrofluorobenzene.
DT 9603
AU Bour H; Peyron E; Gaucherand M; Garrigue JL; Desvignes C; Kaiserlian D;
Revillard JP; Nicolas JF; INSERM U.80, Universite Claude Bernard Lyon I,
Faculte A.; Carrel, France.
SO Eur J Immunol. 1995 Nov;25(11):3006-10. Unique Identifier : AIDSLINE
MED/96085168
AB Contact sensitivity (CS) is a form of delayed-type hypersensitivity to
haptens applied epicutaneously and is thought to be mediated, like
classical delayed-type hypersensitivity responses, by CD4+ T helper-1
cells. The aim of this study was to identify the effector T cells
involved in CS. We studied CS to the strongly sensitizing hapten
dinitrofluorobenzene (DNFB) in mice rendered deficient by homologous
recombination in either major histocompatibility complex (MHC) class I,
MHC class II, or both, and which exhibited deficiencies in,
respectively, CD8+, CD4+, or both, T cells. MHC class I single-deficient
and MHC class I/class II double-deficient mice, both of which have a
drastic reduction in the number of CD8+ T cells, were unable to mount a
CS response to DNFB. In contrast, both MHC class II-deficient mice and
normal mice treated with an anti-CD4 monoclonal antibody (mAb) developed
exaggerated and persistent responses relative to heterozygous control
littermates. Furthermore, anti-CD8 mAb depletion of class II-deficient
mice totally abolished their ability to mount an inflammatory response
to DNFB. Removal of residual CD4+ T cells in class II-deficient mice by
anti-CD4 mAb treatment did not diminish the intensity of CS. These data
clearly demonstrate that class I-restricted CD8+ T cells are sufficient
for the induction of CS to DNFB, and further support the idea that MHC
class II-restricted CD4+ T cells down-regulate this inflammatory
response.
DE Animal CD4-Positive T-Lymphocytes/*IMMUNOLOGY CD8-Positive
T-Lymphocytes/*IMMUNOLOGY Dermatitis, Allergic Contact/*IMMUNOLOGY
Dinitrofluorobenzene/*IMMUNOLOGY Down-Regulation (Physiology)/GENETICS
Female Haptens/*IMMUNOLOGY Histocompatibility Antigens Class
I/GENETICS Histocompatibility Antigens Class II/GENETICS Major
Histocompatibility Complex/*GENETICS Male Mice Mice, Inbred C57BL
Mice, Mutant Strains Support, Non-U.S. Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).