home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9603.zip
/
M9630705.TXT
< prev
next >
Wrap
Text File
|
1996-02-27
|
3KB
|
44 lines
Document 0705
DOCN M9630705
TI Modulation of immunity to Borrelia burgdorferi by ultraviolet
irradiation: differential effect on Th1 and Th2 immune responses.
DT 9603
AU Brown EL; Rivas JM; Ullrich SE; Young CR; Norris SJ; Kripke ML;
Department of Immunology, University of Texas M.D. Anderson; Cancer
Center, Houston 77030, USA.
SO Eur J Immunol. 1995 Nov;25(11):3017-22. Unique Identifier : AIDSLINE
MED/96085170
AB Ultraviolet B (UVB) radiation suppresses the delayed-type
hypersensitivity (DTH) response to alloantigen by a mechanism involving
interleukin (IL)-10. It has been hypothesized, based on this result,
that UV irradiation shifts the immune response from a Th1 to a Th2
response. We tested this hypothesis using Borrelia burgdorferi (Bb) as
an antigen under conditions where both DTH and antibody responses could
be assessed. Mice were irradiated with a single dose of UV and then
immunized with Bb in complete Freund's adjuvant (CFA). DTH was assessed
by footpad challenge. At various time points thereafter, mice were bled,
and the serum antibodies to Bb were quantitated. Only IgG1, IgG2a, and
IgG2b were produced in response to Bb. The IgG2a and IgG2b antibody
responses, as well as the DTH response to Bb, showed UV dose-dependent
reductions after UV irradiation. The primary IgG1 response to Bb was
very low and was unaffected by UV irradiation; however, the IgG1
secondary response was elevated in UV-irradiated mice. Injection of
anti-IL-10 antibody into UV-irradiated mice within 24 h after UV
exposure restored the DTH response, as well as the IgG2a and IgG2b
antibody responses. In addition, injecting recombinant murine IL-10
mimicked some of the effects of UV radiation. Our results support the
hypothesis that in vivo, UV irradiation down-regulates Th1 immune
responses, while leaving Th2 responses intact, and suggest that IL-10 is
an important mediator of this effect.
DE Animal Antibodies, Bacterial/*BIOSYNTHESIS Borrelia
burgdorferi/*IMMUNOLOGY Female Hypersensitivity, Delayed/*IMMUNOLOGY
IgG/BIOSYNTHESIS Immunosuppression/METHODS
Interleukin-10/*PHARMACOLOGY Mice Mice, Inbred C3H Support, U.S.
Gov't, P.H.S. Th1 Cells/DRUG EFFECTS/*IMMUNOLOGY/RADIATION EFFECTS Th2
Cells/DRUG EFFECTS/*IMMUNOLOGY/RADIATION EFFECTS *Ultraviolet Rays
Whole-Body Irradiation JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).