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Rhinovirus-induced alterations on peripheral blood mononuclear cell phenotype and costimulatory molecule expression in normal and atopic asthmatic subjects

Rhinovirus-induced alterations on peripheral blood mononuclear cell phenotype and costimulatory molecule expression in normal and atopic asthmatic subjects
Rhinovirus-induced alterations on peripheral blood mononuclear cell phenotype and costimulatory molecule expression in normal and atopic asthmatic subjects
BackgroundRhinovirus (RV) infection is the commonest trigger of acute asthma exacerbations; however, the immune response to these viruses and any potential implications in the mechanisms leading to asthma exacerbations are not well understood.
ObjectiveTo assess the effects of in vitro RV infection on the phenotype and expression of costimulatory molecules on peripheral blood mononuclear cells (PBMC) from normal and atopic asthmatic subjects, as a model for RV antigen presentation.
MethodsPBMC from seven normal and seven asthmatic subjects were exposed to one infectious unit/cell of RV16 for 48 h. Surface expression of CD25, CD28, CD40, CD54, CD80, CD86 and CTLA-4 was evaluated on CD3, CD4, CD8, CD14 and CD19 PBMC subpopulations by three-colour flow cytometry.
ResultsNo changes in the percentage of CD3, CD4, CD8 or CD19 were observed. CD14 was significantly reduced by the infection and this was more pronounced in normal subjects. On Th cells CTLA-4 was increased after RV infection only in the asthmatic group. Levels of CD80 and CD86 in the control cultures were lower in the asthmatic group. RV infection induced a significant increase of CD80 on monocytes and of CD86 on B cells, which occurred in both groups but were less marked in atopic asthmatic subjects.
ConclusionExposure of PBMC to RV is able to activate the antigen presentation machinery. Differences between normal and atopic asthmatic individuals are compatible with the hypothesis that an aberrant immune response to RV may be involved in the development of acute exacerbations in atopic asthmatic subjects.
0954-7894
537-542
Papadopoulos, N.G.
fac5aea9-7ee2-4579-90c8-e547b6a4bdf7
Stanciu, L.A.
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Papi, A.
e64601e5-163a-416d-867d-c548aa80dd75
Holgate, S.T.
2e7c17a9-6796-436e-8772-1fe6d2ac5edc
Johnston, S.L.
f31c4376-1118-4eba-807d-9264c8df10a1
Papadopoulos, N.G.
fac5aea9-7ee2-4579-90c8-e547b6a4bdf7
Stanciu, L.A.
0c4d1073-f1b5-4b4b-8aa0-90694922cd3e
Papi, A.
e64601e5-163a-416d-867d-c548aa80dd75
Holgate, S.T.
2e7c17a9-6796-436e-8772-1fe6d2ac5edc
Johnston, S.L.
f31c4376-1118-4eba-807d-9264c8df10a1

Papadopoulos, N.G., Stanciu, L.A., Papi, A., Holgate, S.T. and Johnston, S.L. (2002) Rhinovirus-induced alterations on peripheral blood mononuclear cell phenotype and costimulatory molecule expression in normal and atopic asthmatic subjects. Clinical & Experimental Allergy, 32 (4), 537-542. (doi:10.1046/j.0954-7894.2002.01313.x).

Record type: Article

Abstract

BackgroundRhinovirus (RV) infection is the commonest trigger of acute asthma exacerbations; however, the immune response to these viruses and any potential implications in the mechanisms leading to asthma exacerbations are not well understood.
ObjectiveTo assess the effects of in vitro RV infection on the phenotype and expression of costimulatory molecules on peripheral blood mononuclear cells (PBMC) from normal and atopic asthmatic subjects, as a model for RV antigen presentation.
MethodsPBMC from seven normal and seven asthmatic subjects were exposed to one infectious unit/cell of RV16 for 48 h. Surface expression of CD25, CD28, CD40, CD54, CD80, CD86 and CTLA-4 was evaluated on CD3, CD4, CD8, CD14 and CD19 PBMC subpopulations by three-colour flow cytometry.
ResultsNo changes in the percentage of CD3, CD4, CD8 or CD19 were observed. CD14 was significantly reduced by the infection and this was more pronounced in normal subjects. On Th cells CTLA-4 was increased after RV infection only in the asthmatic group. Levels of CD80 and CD86 in the control cultures were lower in the asthmatic group. RV infection induced a significant increase of CD80 on monocytes and of CD86 on B cells, which occurred in both groups but were less marked in atopic asthmatic subjects.
ConclusionExposure of PBMC to RV is able to activate the antigen presentation machinery. Differences between normal and atopic asthmatic individuals are compatible with the hypothesis that an aberrant immune response to RV may be involved in the development of acute exacerbations in atopic asthmatic subjects.

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Published date: 2002

Identifiers

Local EPrints ID: 27308
URI: http://eprints.soton.ac.uk/id/eprint/27308
ISSN: 0954-7894
PURE UUID: cf051c88-2857-44f7-b725-772d6c526487

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Date deposited: 25 Apr 2006
Last modified: 15 Mar 2024 07:17

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Contributors

Author: N.G. Papadopoulos
Author: L.A. Stanciu
Author: A. Papi
Author: S.T. Holgate
Author: S.L. Johnston

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