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Waserman S, Nair P, Snider D, Conway M, Jayaram L, McCleary LM, Dolovich J, Hargreave FE, Marshall JS. Local and systemic immunological parameters associated with remission of asthma symptoms in children. ALLERGY, ASTHMA, AND CLINICAL IMMUNOLOGY : OFFICIAL JOURNAL OF THE CANADIAN SOCIETY OF ALLERGY AND CLINICAL IMMUNOLOGY 2012; 8:16. [PMID: 23043798 PMCID: PMC3599667 DOI: 10.1186/1710-1492-8-16] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 09/18/2012] [Indexed: 11/10/2022]
Abstract
The immunological and clinical parameters that are associated with asthma remission are poorly understood. The cytokine and local mediator changes associated with the resolution of asthma symptoms were examined in three groups of subjects 12-18 years of age (n = 15 in each group): (a) continuing asthma group (CA) who had persistent symptoms since early childhood, (b) an age, sex and atopic status-matched group who had persistent symptoms in early childhood but in whom these had resolved (RA), and (c) a non-atopic, non-asthmatic control group. Clinical parameters, sputum cell counts, peripheral blood mononuclear cell (PBMC) cytokine production and activation marker expression were determined. All of the CA had methacholine airway hyperresponsiveness compared with only half of the RA subjects. The CA showed elevated numbers of eosinophils and increased ECP and IL-5 in sputum, which were not observed in the RA. PBMC cytokine studies revealed increased production of the type 1 cytokines IL-12, IFN-γ and TNF-α in the CA group compared with the RA group, under a range of activation conditions, however, the production of IL-4 and IL-5 were unchanged. These findings suggest that decreased type 1 cytokine expression as well as decreased eosinophilic inflammation is associated with the resolution of asthma symptoms.
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Affiliation(s)
- Susan Waserman
- Departments of Medicine, McMaster University, Hamilton, ON, Canada
- Department of Allergy and Clinical Immunology, McMaster University Medical Centre, 1200 Main Street West, Hamilton, ON, Canada
| | | | - Denis Snider
- Departments of Pathology, McMaster University, Hamilton, ON, Canada
| | - Mary Conway
- Departments of Medicine, McMaster University, Hamilton, ON, Canada
| | - Lata Jayaram
- Departments of Medicine, McMaster University, Hamilton, ON, Canada
| | - Lynn M McCleary
- Microbiology & Immunology, Dalhousie University, Halifax, NS, Canada
| | - Jerry Dolovich
- Departments of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Jean S Marshall
- Departments of Pathology, Dalhousie University, Halifax, NS, Canada
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John AE, Gerard CJ, Schaller M, Miller AL, Berlin AA, Humbles AA, Lukacs NW. Respiratory syncytial virus-induced exaggeration of allergic airway disease is dependent upon CCR1-associated immune responses. Eur J Immunol 2005; 35:108-16. [PMID: 15593301 DOI: 10.1002/eji.200425439] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Severe respiratory syncytial virus (RSV) infection has a significant impact on airway function, and may alter subsequent development of asthma. CCR1 mRNA was significantly up-regulated during primary RSV infection in BALB/c mice, and was also up-regulated during allergen exposure in sensitized mice. Although CCR1(-/-) mice exhibited similar levels of airway hyperresponsiveness (AHR) as wild-type mice in response to cockroach allergen alone, in animals treated with RSV prior to cockroach antigen (CRA) sensitization and challenge, a significant decrease in exacerbated AHR was observed in the CCR1(-/-) mice. The reduction in AHR after RSV and allergen challenge in CCR1(-/-) mice was not associated with changes in peribronchial eosinophilia, but was accompanied by significantly decreased IL-13 levels in the lungs, as well as an absence of mucus cell staining within the airways. When T lymphocyte numbers were compared in animals receiving CRA to animals receiving a combination of RSV and allergen an increase in both CD4 and CD8 T lymphocytes could be detected in wild-type but not CCR1(-/-) animals. Thus, these data suggest that CCR1-mediated responses have a primary role for inducing severe disease during RSV infection, and may be responsible for altering the lung pathophysiological responses to subsequent allergen challenges via IL-13-mediated mechanisms.
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Affiliation(s)
- Alison E John
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109-0602, USA
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