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- 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).
-
-