home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9602.ZIP
/
M9620732.TXT
< prev
next >
Wrap
Text File
|
1996-02-26
|
3KB
|
44 lines
Document 0732
DOCN M9620732
TI Accumulation of activated CD4+ lymphocytes in the lung of individuals
infected with HIV accompanied by increased virus production in patients
with secondary infections.
DT 9602
AU Franchini M; Walker C; Henrard DR; Suter-Gut D; Braun P; Villiger B;
Suter M; Swiss Institute of Allergy and Asthma Research (SIAF), Davos;
Platz, Switzerland.
SO Clin Exp Immunol. 1995 Nov;102(2):231-7. Unique Identifier : AIDSLINE
MED/96069868
AB The lung is continuously exposed to infectious and non-infectious agents
causing cell activation. Activated cells in the lung such as
antigen-presenting cells which harbour HIV may favour this organ as a
site for virus production. To test this hypothesis, cells from blood and
bronchoalveolar lavage (BAL) of HIV-infected patients and healthy
controls were obtained and the activation of the cells were analysed by
measuring the expression of IL-2 receptor, HLA-DR and VLA-1. The
HIV-infected individuals were subdivided into 'lung symptomatic' or
'lung asymptomatic' patients, depending on the presence or absence of
secondary lung diseases besides HIV. All HIV-infected individuals
demonstrated a decreased number of CD4+ lymphocytes in blood; however,
normal numbers of these cells were found in BAL. The activation state of
CD4+ and CD8+ T lymphocytes in blood and BAL was higher in lymphocytes
from HIV-infected patients compared with controls. The activation state
was highest in the lung symptomatic group. Lung symptomatic patients and
lung asymptomatic patients with extrapulmonary infections had increased
levels of free virus in plasma. Four out of four individuals without or
with only low amounts of cell-free HIV in plasma belonged to the
symptom-free subgroup. These results suggest that microorganisms other
than HIV may promote viral replication via antigen-driven accumulation
and activation of CD4+ cells in the lung or other organs, and thus may
be responsible for the loss of helper T cells and the progression of the
disease.
DE Bronchoalveolar Lavage Fluid/CYTOLOGY CD4-Positive
T-Lymphocytes/*IMMUNOLOGY Female Human HIV
Infections/COMPLICATIONS/*IMMUNOLOGY HIV-1/GROWTH & DEVELOPMENT Lung
Diseases/COMPLICATIONS/*IMMUNOLOGY Male Support, Non-U.S. Gov't
*Virus Replication JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).