Decreased soluble RAGE in neutrophilic asthma is correlated with disease severity and RAGE G82S variants
- 18 December 2017
- journal article
- research article
- Published by Spandidos Publications in Molecular Medicine Reports
- Vol. 17 (3), 4131-4137
- https://doi.org/10.3892/mmr.2017.8302
Abstract
The advanced glycosylation end product-specific receptor (RAGE) has been demonstrated to be an important mediator of asthma pathogenesis. The soluble isoform of RAGE (sRAGE) acts as a decoy' to sequester RAGE ligands, and thus prevents their binding to the receptor. A number of reports have linked deficiency of sRAGE to the severity and outcomes of various human diseases, and association with RAGE G82S variants. However, whether sRAGE levels are increased or decreased in asthmatic patients is unclear. The aim of the present study was to determine plasma sRAGE levels in different asthma phenotypes and associations of plasma sRAGE levels with RAGE G82S variants. A total of 85 neutrophilic and 109 non-neutrophilic newly diagnosed asthmatic patients, and 118 healthy controls, were recruited. Plasma sRAGE levels were measured by ELISA analysis. RAGE G82S genotypes were detected using the Sanger sequencing method. Plasma sRAGE levels were decreased in neutrophilic asthmatics (443.67 +/- 208.9 pg/ml) and increased in non-neutrophilic asthmatics (677.63 +/- 300.75 pg/ml) compared with healthy controls (550.02 +/- 300.83 pg/ml) (P<0.001). Plasma sRAGE levels were positively correlated with FEV1% predicted (FEV1% Pre) (r(p)=0.258; P=0.023) in neutrophilic asthmatics. The frequency of G82S genotypes was significantly different between neutrophilic and non-neutrophilic asthmatics (P=0.009). Neutrophilic asthmatics with genotypes A/G or A/A (389.83 +/- 150.37 and 264.59 +/- 161.74 pg/ml, respectively) had significantly decreased sRAGE levels compared with the G/G genotype (498.64 +/- 235.37 pg/ml) (P=0.022). Those with the A/G and A/A genotype (60.14 +/- 22.36%) displayed a trend toward lower FEV1% Pre compared with those with the G/G genotype (64.51 +/- 27.37%). No significant difference in sRAGE levels or an association with FEV1% Pre was observed between the different genotypes in non-neutrophilic asthmatics. In conclusion, the results of the present study indicated that plasma sRAGE levels are altered in different asthma inflammatory phenotypes. Plasma sRAGE may be a biomarker of asthma severity and may be associated with G82S gene variants in neutrophilic asthmatics.Keywords
This publication has 39 references indexed in Scilit:
- The Receptor for Advanced Glycation End Products Is a Central Mediator of Asthma PathogenesisThe American Journal of Pathology, 2012
- Soluble receptor for advanced glycation end products in COPD: relationship with emphysema and chronic cor pulmonale: a case-control studyRespiratory Research, 2011
- Higher Plasma Soluble Receptor for Advanced Glycation End Products (sRAGE) Levels Are Associated With Incident Cardiovascular Disease and All-Cause Mortality in Type 1 DiabetesDiabetes, 2010
- The Receptor for Advanced Glycation End Products (RAGE) and the LungJournal of Biomedicine and Biotechnology, 2010
- Genome-wide association study identifies five loci associated with lung functionNature Genetics, 2009
- Meta-analyses of genome-wide association studies identify multiple loci associated with pulmonary functionNature Genetics, 2009
- Receptor for Advanced Glycation End Products Is Subjected to Protein Ectodomain Shedding by MetalloproteinasesJournal of Biological Chemistry, 2008
- A soluble form of the receptor for advanced glycation endproducts (RAGE) is produced by proteolytic cleavage of the membrane‐bound form by the sheddase a disintegrin and metalloprotease 10 (ADAM10)The FASEB Journal, 2008
- Global strategy for asthma management and prevention: GINA executive summaryEuropean Respiratory Journal, 2008
- Promotion of cell adherence and spreading: a novel function of RAGE, the highly selective differentiation marker of human alveolar epithelial type I cellsCell and tissue research, 2005