Expression of macrophage inflammatory protein (MIP)-1alpha, MIP-1beta, and RANTES genes in lymph nodes from HIV+ individuals: correlation with a Th1-type cytokine response.
The in vivo response of the immune system after HIV infection in regard to cytokine production and C-C chemokine synthesis is not well known. Here we have analysed cytokine and chemokine mRNA production in lymph nodes with follicular hyperplasia (FHLN) of HIV-infected patients by in situ hybridization using anti-sense mRNA probes. The synthesis of mRNAs for interferon-gamma (IFN-gamma), IL-12p35, IL-12p40, IL-4, and for the C-C chemokines RANTES, MIP-1alpha, and MIP-1beta was compared with that of lymph nodes from non-infected individuals to define HIV-specific events. Only few cells expressing IFN-gamma, RANTES, MIP-1alpha, and MIP-1beta mRNAs were detectable in the T-dependent area of lymph nodes from HIV-negatives. In contrast, in FHLN from HIV+ patients a high number of IFN-gamma, RANTES, MIP-1alpha, and MIP-1beta mRNA-containing cells were detectable. Remarkably, only single individual IL-12p35 mRNA-producing cells were present in the T-dependent area from both HIV+ and HIV lymph nodes. Furthermore, the low number of IL-12p40 mRNA-expressing cells did not differ between HIV+ and HIV- lymph nodes. This indicates that IFN-gamma is expressed independently of IL-12, possibly by a direct T cell-mediated reaction. IL-4 mRNA-producing cells were hardly detectable in infected and control lymph nodes. The same findings were made in a limited number of samples from patients with advanced disease. Thus, these results demonstrate that a high IFN-gamma production is accompanied by a strong expression of MIP-1alpha, MIP-1beta, and RANTES in the lymph node after HIV infection. This favours the idea that a Th1-type immune response correlates with a preferential production of C-C chemokines in FHLN of HIV+ patients.
Trumpfheller
C
C
Department of Immunology, Bernhard Nocht-Institute for Tropical Medicine, Hamburg, Germany.
Tenner-Racz
K
K
Racz
P
P
Fleischer
B
B
Frosch
S
S
D000328:Adult; D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5 / Q000096:biosynthesis* / Q000276:immunology; D005260:Female; D015658:HIV Infections / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D015497:HIV-1; D006801:Humans; D008198:Lymph Nodes / Q000276:immunology*; D019402:Macrophage Inflammatory Proteins / Q000096:biosynthesis* / Q000276:immunology; D008297:Male; D008875:Middle Aged; D018417:Th1 Cells / Q000276:immunology*
D054405:Chemokine CCL3; D054407:Chemokine CCL4; D018946:Chemokine CCL5; D019402:Macrophage Inflammatory Proteins