Abstract:
BACKGROUND:The cyclooxygenase- (COX-) 2/microsomal PGE-synthase- (mPGES-) 1/PGE-receptor- (EP-) 4 axis could play a key role in the physiopathology of abdominal aortic aneurysm (AAA) in humans. In this study, we investigated the influence of cardiovascular risk factors on the expression of the PGE2 pathway in human AAA. METHODS:Aortic (n = 89) and plasma (n = 79) samples from patients who underwent AAA repair were collected. Patients were grouped according to risk factors. COX-isoenzymes, mPGES-1, EPs, α-actin, and CD45 and CD68 transcripts levels were quantified by QRT-PCR and plasma PGE2 metabolites by EIA. RESULTS:Current smoking (CS) patients compared to no-CS had significantly higher local levels of mPGES-1 (P = 0.009), EP-4 (P = 0.007), and PGE2 metabolites plasma levels (P = 0.008). In the multiple linear regression analysis, these parameters remained significantly enhanced in CS after adding confounding factors. Results from association studies with cell type markers suggested that the increased mPGES-1/EP-4 levels were mainly associated with microvascular endothelial cells. CONCLUSIONS:This study shows that elements of the PGE2 pathway, which play an important role in AAA development, are increased in CS. These results provide insight into the relevance of tobacco smoking in AAA development and reinforce the potential of mPGES-1 and EP-4 as targets for therapy in AAA patients.
journal_name
Mediators Inflammjournal_title
Mediators of inflammationauthors
Dilmé JF,Solà-Villà D,Bellmunt S,Romero JM,Escudero JR,Camacho M,Vila Ldoi
10.1155/2014/316150subject
Has Abstractpub_date
2014-01-01 00:00:00pages
316150eissn
0962-9351issn
1466-1861journal_volume
2014pub_type
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journal_title:Mediators of inflammation
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journal_title:Mediators of inflammation
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