The aim of the present study was the development of a reliable method to evaluate the pattern of the ongoing T-cell response in young infants affected by respiratory infection. To this purpose, we enrolled 44 infants hospitalized with a diagnosis of respiratory syncytial virus bronchiolitis. After a short-term stimulation of whole blood samples, intracellular IFN-g and IL-4 cytokines were measured in CD4+ and CD8+ T-cell subsets by flow cytometry. A stringent staining and gating strategy was used in order to maximize the reduction of background noise and to exclude false positives. The frequencies of cytokine-producing T-cell subsets, albeit low, were easily quantifiable. Cytokine responses were higher in infants sampled > 7 days from the onset of symptoms. The use of a rigorous strategy for cell staining and gating, coupled with a short-term stimulation of whole blood and a careful evaluation of time elapsed from the onset of symptoms constitutes a convincing approach for future clinical studies.
Use of a short-term whole blood intracellular staining assay to study the T-cell response in respiratory syncytial virus-infected pediatric patients / Frassanito, A; Fedele, G; Leone, P; Nenna, R; Midulla, F; Schiavoni, I. - In: JOURNAL OF BIOLOGICAL REGULATORS & HOMEOSTATIC AGENTS. - ISSN 0393-974X. - 32:5(2018), pp. 1339-1344.
Use of a short-term whole blood intracellular staining assay to study the T-cell response in respiratory syncytial virus-infected pediatric patients
Frassanito, A;Nenna, R;Midulla, F;
2018
Abstract
The aim of the present study was the development of a reliable method to evaluate the pattern of the ongoing T-cell response in young infants affected by respiratory infection. To this purpose, we enrolled 44 infants hospitalized with a diagnosis of respiratory syncytial virus bronchiolitis. After a short-term stimulation of whole blood samples, intracellular IFN-g and IL-4 cytokines were measured in CD4+ and CD8+ T-cell subsets by flow cytometry. A stringent staining and gating strategy was used in order to maximize the reduction of background noise and to exclude false positives. The frequencies of cytokine-producing T-cell subsets, albeit low, were easily quantifiable. Cytokine responses were higher in infants sampled > 7 days from the onset of symptoms. The use of a rigorous strategy for cell staining and gating, coupled with a short-term stimulation of whole blood and a careful evaluation of time elapsed from the onset of symptoms constitutes a convincing approach for future clinical studies.File | Dimensione | Formato | |
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