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Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Respir+J 2016 ; 10 (1): 22-31 Nephropedia Template TP
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Critical role of RIG-I-like receptors in inflammation in chronic obstructive pulmonary disease #MMPMID24992168
Zhang Q; Wan H; Huang S; Zhang Y; Wang Y; Guo X; He P; Zhou M
Clin Respir J 2016[Jan]; 10 (1): 22-31 PMID24992168show ga
INTRODUCTION: Viral infection is a significant cause of chronic obstructive pulmonary disease (COPD) and acute exacerbation of COPD. Retinoic acid inducible gene I (RIG-I)-like receptors (RLRs), including RIG-I and melanoma differentiation associated gene 5 (MDA-5), are important pattern recognition receptors for viral elimination. OBJECTIVE: The study aims to investigate the role of RIG-I and MDA-5 in COPD pathogenesis. METHODS: We examined the expression of RIG-I and MDA-5 by immunohistochemistry, real-time PCR and Western blots in COPD patients and control subjects. RESULTS: Our results showed that MDA-5 expression was upregulated in lung tissues and peripheral blood mononuclear cells of COPD patients and there was a negative correlation between MDA-5 mRNA levels and forced expiratory volume in 1 s %pred. COPD patients had higher interleukin (IL)-1 and IL-8 mRNA expression levels, and these inflammatory cytokines positively correlate with MDA-5 levels. However, there was no difference in the expression of RIG-I between COPD patients and control subjects. CONCLUSION: Our results suggested that MDA-5, but not RIG-I, may play a critical role in airway inflammation in COPD.