home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9601.ZIP
/
M9610476.TXT
< prev
next >
Wrap
Text File
|
1996-01-30
|
3KB
|
49 lines
Document 0476
DOCN M9610476
TI Differential antibody isotype reactivity to specific antigens in human
lymphatic filariasis: gp15/400 preferentially induces immunoglobulin E
(IgE), IgG4, and IgG2.
DT 9601
AU Yazdanbakhsh M; Paxton WA; Brandenburg A; Van Ree R; Lens M; Partono F;
Maizels RM; Selkirk ME; Department of Parasitology, University of
Leiden, The; Netherlands.
SO Infect Immun. 1995 Oct;63(10):3772-9. Unique Identifier : AIDSLINE
MED/96009726
AB Lymphatic filarial infection in humans is associated with a strong
skewing of the immune response towards the TH2 arm, with prominent
interleukin 4-producing cells and elevated levels of immunoglobulin G4
(IgG4) and IgE antibodies in peripheral blood. To determine how such a
generalized TH2 imbalance governs responses to individual parasite
antigens, the profiles of isotypes of antibodies to two recombinant
proteins of Brugia spp. were studied. One molecule was the C-terminal
portion of the filarial heat shock protein 70 (Bpa-26), representative
of a cytoplasmic protein, and the second antigen was a single unit of
the tandem repeats of a Brugia polypeptide (BpL-4), a secreted product
which is prominently exposed to the immune system. Serum samples from
146 individuals resident in areas in which brugian filariasis is endemic
were used, and it was found that whereas the levels of IgG1 and IgG3
responses to both Bpa-26 and BpL-4 were high, IgG4 and IgE antibodies to
only BpL-4, not to Bpa-26, were prominent. Thus, an antigen which is
chronically exposed to the immune system elicited a TH2-dependent
isotype switch, as manifested by increased IgG4 and IgE responses.
Moreover, IgG4 and IgE responses to BpL-4 showed a strong negative
association, suggesting that mediators other than interleukin 4 must be
responsible for such differential regulation of these two isotypes. When
the data were analyzed as a function of clinical status, a striking
association between elevated levels of IgG3 antibodies to Bpa-26 and
manifestation of chronic obstructive disease was found; elephantiasis
patients showed significantly higher levels of IgG3 antibodies to Bpa-26
than microfilaremics and asymptomatic amicrofilaremics. This indicates
that an imbalance of isotypes of antibodies to particular filarial
antigens might play a role in the pathogenesis of chronic disease.
DE Adolescence Adult Aged Animal Antibodies, Helminth/*BIOSYNTHESIS
Antigens, Helminth/*IMMUNOLOGY Brugia/*IMMUNOLOGY Elephantiasis,
Filarial/*IMMUNOLOGY Female Helminth Proteins/*IMMUNOLOGY Human
IgE/BIOSYNTHESIS IgG/BIOSYNTHESIS/CLASSIFICATION Immunoglobulin
Isotypes/*BIOSYNTHESIS Male Middle Age Support, Non-U.S. Gov't 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).