home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9410p.zip
/
M94A3219.TXT
< prev
next >
Wrap
Text File
|
1994-10-25
|
3KB
|
45 lines
Document 3219
DOCN M94A3219
TI Modulation of Th1 responses in HIV infection and tuberculosis (TB).
DT 9412
AU Barnes P; Zhang M; Jones B; Univ. of Southern California, Los Angeles.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):126 (abstract no. PA0122). Unique
Identifier : AIDSLINE ICA10/94369356
AB To evaluate the Th1/Th2 cytokine profile in HIV-infected TB patients, we
evaluated proliferative responses to M. tb and patterns of cytokine
production by PBMC from 40 TB patients, with or without concomitant HIV
infection. Upon stimulation with M. tb in vitro, PBMC from HIV-infected
TB patients had reduced proliferation (mean delta cpm 1989 versus 26110,
p < 0.0001) and production of IFN-gamma (mean 822 versus 2278 pg/ml, p =
0.004), but IL-10 production was not diminished (mean 711 versus 578
pg/ml). We next used RT-PCR with internal controls to quantitate
cytokine mRNA in M. tb-stimulated PBMC from TB patients, 12 with and 13
without HIV infection. Samples were normalized to contain 0.4 attoM of
CD3 delta chain cDNA, then amplified by PCR with cytokine-specific
primers. mRNA for the Th1 cytokines IFN-gamma and IL-2 was significantly
reduced in HIV-infected TB patients (mean .069 versus .544 attoM of
IFN-gamma cDNA, and .003 versus .025 attoM of IL-2 cDNA). In contrast,
mRNA for the Th2 cytokines IL-4 and IL-10 was comparable in TB patients
with or without HIV infection. In purified CD4+ cells, mRNA for Th1
cytokines was still lower in HIV-infected patients. M. tb-induced
proliferative responses by PBMC from HIV-infected TB patients were
markedly enhanced by addition of anti-IL-10 in 10/11 patients, and by
addition of recombinant IL-12 in 6/10 patients. Proliferation was not
enhanced by anti-IL-4. M. tb-induced production of IFN-gamma was
markedly enhanced by anti-IL-10 or IL-12. We conclude that Th1 responses
are reduced in HIV-infected TB patients, and that these responses can be
augmented by antibodies to IL-10 or by IL-12.
DE Antibodies/PHARMACOLOGY AIDS-Related Opportunistic
Infections/*IMMUNOLOGY Cells, Cultured Comparative Study
Cytokines/*BIOSYNTHESIS DNA Primers Human Interferon Type
II/BIOSYNTHESIS Interleukin-10/ANTAGONISTS & INHIB/BIOSYNTHESIS
Interleukin-2/BIOSYNTHESIS Interleukin-4/ANTAGONISTS & INHIB
Interleukins/PHARMACOLOGY Lymphocyte Transformation/DRUG EFFECTS
Lymphocytes/DRUG EFFECTS/*IMMUNOLOGY Polymerase Chain Reaction
Recombinant Proteins/PHARMACOLOGY RNA, Messenger/BIOSYNTHESIS
Tuberculosis/*IMMUNOLOGY MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).