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BioMed Research International
Volume 2014 (2014), Article ID 670814, 9 pages
Research Article

The Step Further to Understand the Role of Cytosolic Phospholipase A2 Alpha and Group X Secretory Phospholipase A2 in Allergic Inflammation: Pilot Study

1Department of Immunopathology, Faculty of Biomedical Sciences and Postgraduate Training, Medical University of Lodz, 7/9, Zeligowskiego Street, 90-752 Lodz, Poland
2Critical Care Medicine Department, Critical Center, National Institutes of Health, Bethesda, MD 20892-1662, USA
3Department of Internal Diseases, Asthma and Allergy, Medical University of Lodz, 90-153 Lodz, Poland

Received 27 June 2014; Revised 11 August 2014; Accepted 11 August 2014; Published 27 August 2014

Academic Editor: Hiroto Matsuse

Copyright © 2014 Ewa Pniewska et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Allergens, viral, and bacterial infections are responsible for asthma exacerbations that occur with progression of airway inflammation. cPLA2α and sPLA2X are responsible for delivery of arachidonic acid for production of eicosanoids—one of the key mediators of airway inflammation. However, cPLA2α and sPLA2X role in allergic inflammation has not been fully elucidated. The aim of this study was to analyze the influence of rDer p1 and rFel d1 and lipopolysaccharide (LPS) on cPLA2α expression and sPLA2X secretion in PBMC of asthmatics and in A549 cell line. PBMC isolated from 14 subjects, as well as A549 cells, were stimulated with rDer p1, rFel d1, and LPS. Immunoblotting technique was used to study the changes in cPLA2α protein expression and ELISA was used to analyze the release of sPLA2X. PBMC of asthmatics released more sPLA2X than those from healthy controls in the steady state. rDer p1 induced more sPLA2X secretion than cPLA2α protein expression. rFel d1 caused decrease in cPLA2α relative expression in PBMC of asthmatics and in A549 cells. Summarizing, Der p1 and Fel d1 involve phospholipase A2 enzymes in their action. sPLA2X seems to be one of important PLA2 isoform in allergic inflammation, especially caused by house dust mite allergens.