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Transforming growth factor-beta enhances rhinovirus infection by diminishing early innate responses.
Am J Respir Cell Mol Biol 2009; 41(3):339-47AJ

Abstract

Individuals with asthma are prone to viral and bacterial infections, and most asthma exacerbations have been linked to viruses, particularly rhinovirus. Excess transforming growth factor (TGF)-beta present in asthmatic airways may cause immune suppression, as well as transdifferentiate fibroblasts to myofibroblasts, thereby augmenting proinflammatory responses after rhinovirus infection. After rhinovirus infection we examined virus replication and host cell immune responses in airway fibroblasts in the presence of TGF-beta1 and in myofibroblasts. Primary culture fibroblasts were pretreated with TGF-beta1 or transdifferentiated into myofibroblasts, and then infected with rhinovirus. Viral replication, virus release, chemokine production, and interferon (IFN) responses were measured over 72 hours. Rhinovirus replication and virus release into supernatants were enhanced in fibroblasts incubated with TGF-beta1 and in fibroblasts obtained from patients with asthma. Myofibroblasts also showed more rhinovirus replication, and infected myofibroblasts produced excess neutrophil chemokines. Examination of innate responses revealed blunting of type I IFN reactions with dissociated viral RNA and IFN mRNA responses. Addition of type I IFN restituted antiviral responses, and the effect of TGF-beta1 appeared to be mediated via actions on IFN regulatory factor-3 pathways. These data demonstrate that TGF-beta1 mediates enhanced virus replication and proinflammatory responses in airway cells. TGF-beta may act as an endogenous immunosuppressant promoting virus replication and inflammation during the evolution of acute severe asthma associated with rhinovirus infection.

Authors+Show Affiliations

Departments of Respiratory and Sleep Medicine, Medicine and Surgery, Monash Medical Centre, Clayton, Victoria 3168, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19168696

Citation

Thomas, Belinda J., et al. "Transforming Growth Factor-beta Enhances Rhinovirus Infection By Diminishing Early Innate Responses." American Journal of Respiratory Cell and Molecular Biology, vol. 41, no. 3, 2009, pp. 339-47.
Thomas BJ, Lindsay M, Dagher H, et al. Transforming growth factor-beta enhances rhinovirus infection by diminishing early innate responses. Am J Respir Cell Mol Biol. 2009;41(3):339-47.
Thomas, B. J., Lindsay, M., Dagher, H., Freezer, N. J., Li, D., Ghildyal, R., & Bardin, P. G. (2009). Transforming growth factor-beta enhances rhinovirus infection by diminishing early innate responses. American Journal of Respiratory Cell and Molecular Biology, 41(3), pp. 339-47. doi:10.1165/rcmb.2008-0316OC.
Thomas BJ, et al. Transforming Growth Factor-beta Enhances Rhinovirus Infection By Diminishing Early Innate Responses. Am J Respir Cell Mol Biol. 2009;41(3):339-47. PubMed PMID: 19168696.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Transforming growth factor-beta enhances rhinovirus infection by diminishing early innate responses. AU - Thomas,Belinda J, AU - Lindsay,Mandy, AU - Dagher,Hayat, AU - Freezer,Nicholas J, AU - Li,Dongsheng, AU - Ghildyal,Reena, AU - Bardin,Philip G, Y1 - 2009/01/23/ PY - 2009/1/27/entrez PY - 2009/1/27/pubmed PY - 2009/9/29/medline SP - 339 EP - 47 JF - American journal of respiratory cell and molecular biology JO - Am. J. Respir. Cell Mol. Biol. VL - 41 IS - 3 N2 - Individuals with asthma are prone to viral and bacterial infections, and most asthma exacerbations have been linked to viruses, particularly rhinovirus. Excess transforming growth factor (TGF)-beta present in asthmatic airways may cause immune suppression, as well as transdifferentiate fibroblasts to myofibroblasts, thereby augmenting proinflammatory responses after rhinovirus infection. After rhinovirus infection we examined virus replication and host cell immune responses in airway fibroblasts in the presence of TGF-beta1 and in myofibroblasts. Primary culture fibroblasts were pretreated with TGF-beta1 or transdifferentiated into myofibroblasts, and then infected with rhinovirus. Viral replication, virus release, chemokine production, and interferon (IFN) responses were measured over 72 hours. Rhinovirus replication and virus release into supernatants were enhanced in fibroblasts incubated with TGF-beta1 and in fibroblasts obtained from patients with asthma. Myofibroblasts also showed more rhinovirus replication, and infected myofibroblasts produced excess neutrophil chemokines. Examination of innate responses revealed blunting of type I IFN reactions with dissociated viral RNA and IFN mRNA responses. Addition of type I IFN restituted antiviral responses, and the effect of TGF-beta1 appeared to be mediated via actions on IFN regulatory factor-3 pathways. These data demonstrate that TGF-beta1 mediates enhanced virus replication and proinflammatory responses in airway cells. TGF-beta may act as an endogenous immunosuppressant promoting virus replication and inflammation during the evolution of acute severe asthma associated with rhinovirus infection. SN - 1535-4989 UR - https://www.unboundmedicine.com/medline/citation/19168696/Transforming_growth_factor_beta_enhances_rhinovirus_infection_by_diminishing_early_innate_responses_ L2 - http://www.atsjournals.org/doi/full/10.1165/rcmb.2008-0316OC?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -