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1996-02-26
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Document 0539
DOCN M9620539
TI CD28-B7 costimulatory blockade by CTLA4Ig prevents actively induced
experimental autoimmune encephalomyelitis and inhibits Th1 but spares
Th2 cytokines in the central nervous system.
DT 9602
AU Khoury SJ; Akalin E; Chandraker A; Turka LA; Linsley PS; Sayegh MH;
Hancock WW; Multiple Sclerosis Unit, Brigham and Women's Hospital,
Harvard; Medical School, Boston, MA 02115, USA.
SO J Immunol. 1995 Nov 15;155(10):4521-4. Unique Identifier : AIDSLINE
MED/96062263
AB We studied the contribution of the CD28-B7 costimulatory T cell
activation pathway to the pathogenesis of experimental autoimmune
encephalomyelitis in the Lewis rat model. Systemic administration of
CTLA4Ig suppressed clinical disease and was effective even when CTLA4Ig
was delayed until day 10 postimmunization, a time when pathologic
disease is evident. This protection was not reversible by systemic
administration of high doses of IL-2. Detailed immunohistologic studies
showed that CTLA4Ig therapy resulted in suppression of the inflammatory
response with inhibition of Th1 (IL-2 and IFN-gamma) and sparing of Th2
(IL-4, IL-10, and IL-13) cytokines in the central nervous system. These
results indicate that the CD28-B7 T cell costimulatory pathway plays an
important role in experimental autoimmune encephalomyelitis, a
Th1-mediated disease, and suggest that blockade of this costimulatory
pathway protects against active disease by causing a state of immune
deviation towards Th2 function. The ability of CTLA4Ig to treat animals
with pathologically established disease may have important clinical
implications for patients with multiple sclerosis.
DE Animal Antigens, CD28/*METABOLISM Antigens,
Differentiation/*PHARMACOLOGY Central Nervous System/IMMUNOLOGY
Cytokines/METABOLISM Encephalomyelitis, Allergic/IMMUNOLOGY/*PREVENTION
& CONTROL Interleukin-2/PHARMACOLOGY Lymphocyte Transformation/DRUG
EFFECTS Rats Rats, Inbred Lew Signal Transduction Support, Non-U.S.
Gov't Support, U.S. Gov't, P.H.S. Th1 Cells/*IMMUNOLOGY Th2
Cells/*IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).