Transforming growth factor beta: A role in the upper airway and rhinosinusitis - Dermatophagoides pteronyssinus-induced apoptosis with pulmonary alveolar cells

Patrick D. Frisella, Jonathan Silverberg, Rauno Joks, Marianne Frieri*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Background: There is a link with the upper and lower airway and disruption of alveolar epithelial cells, which is a potential trigger for the reactivation of the epithelial-mesenchymal trophic unit (EMTU) and induced characteristic airway changes associated with allergic asthma. Dermatophagoides pteronyssinus is a common inhalant indoor allergen and is known for causing allergic rhinitis and airway inflammation. Transforming growth factor beta 1 (TGF-beta1) is a major participant in the airway remodeling of asthma, a component of cellular stress response pathways, and enhanced epithelial immunoreactivity is known to occur in allergic rhinitis. Methods: In this study, we show the ability of D. pteronyssinus allergens from dialyzed standardized immunotherapy extract to induce apoptosis and increase TGF-beta1 secretion in a confluent A549 cell line model. A549 cells were treated with either 600 AU/mL dialyzed D. pteronyssinus immunotherapy extract (eDp) or Ctl media (Ctl) for 24 hours. Cells and supernatants were collected, washed, and treated with Annexin V-FITC Apoptosis Detection Kit II (BD Pharmingen, La Jolla, CA) and then analyzed by flow cytometry. TGF-beta1 secretion was determined by ELISA using cell culture supernatants. Results: The eDp group showed a fourfold increase in early apoptotic cells with a twofold increase in late apoptotic cells versus the Ctl group, along with a 1.65-fold increase of TGF-beta1. Conclusion: eDp induced viable A549 cells to undergo apoptosis determined by flow cytometry analysis with a significant increase in TGF-beta1 secretion compared with Ctl.

Original languageEnglish (US)
Pages (from-to)231-235
Number of pages5
JournalAmerican Journal of Rhinology and Allergy
Volume25
Issue number4
DOIs
StatePublished - Jul 1 2011

ASJC Scopus subject areas

  • Immunology and Allergy
  • Otorhinolaryngology

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