Abnormal levels of expression of plasma microRNA-33 in patients with psoriasis.

Abstract

INTRODUCTION AND OBJECTIVES:

Circulating microRNAs (miRNA) are involved in the posttranscriptional regulation of genes associated with lipid metabolism (miRNA-33) and vascular function and angiogenesis (miRNA-126). The objective of this exploratory study was to measure plasma levels of miRNA-33 and miRNA-126 in patients with plaque psoriasis and evaluate their association with clinical parameters.

MATERIAL AND METHODS:

We studied 11 patients with plaque psoriasis. The median Psoriasis Area Severity Index (PASI) was 13 (interquartile range [IQR], 9-14) and body surface area involvement was 12 (IQR, 11-15). Eleven healthy controls matched for age and sex were also included. We analyzed cardiovascular risk factors and subclinical carotid atheromatosis. Plasma miRNAs were evaluated using quantitative real-time polymerase chain reaction.

RESULTS:

Carotid intima-media thickness was greater in patients (0.57mm; IQR, 0.54-0.61; n=11) than in controls (0.50mm; IQR, 0.48-0.54; data available for 9 controls) (P=.0055, Mann-Whitney). Expression of miRNA-33 in patients (5.34; IQR, 3.12-7.96; n=11) was significantly higher than in controls (2.33; IQR, 1.71-2.84; only detected in 7 of 11 controls) (P=.0049, Wilcoxon signed rank). No differences in miRNA-126 levels were observed between patients and controls. In patients (n=11), we observed a positive correlation between miRNA-33 and insulin levels (r=0.7289, P=.0109) and a negative correlation between miRNA-126 and carotid intima-media thickness (r=-0.6181, P=.0426).

CONCLUSION:

In psoriasis patients plasma levels of lipid and glucose metabolism-related miRNA-33 are increased and correlated with insulin. The study of circulating miRNA-33 in psoriasis may provide new insights about the associated systemic inflammatory abnormalities.

• Authors: S García-Rodríguez, S Arias-Santiago, J Orgaz-Molina, C Magro-Checa, I Valenzuela, P Navarro, R Naranjo-Sintes, J Sancho, M Zubiaur
• Journal: Actas dermo-sifiliograficas (Actas Dermosifiliogr) Vol. 105 Issue 5 Pg. 497-503 (Jun 2014) ISSN: 1578-2190 [Electronic] Spain
• PMID: 24656994 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2013 Elsevier España, S.L. and AEDV. All rights reserved.

Chemical References

• MIRN126 microRNA, human
• MIRN33a microRNA, human
• MicroRNAs

Topics

• Adult
• Female
• Gene Expression Regulation
• Humans
• Male
• MicroRNAs (blood, genetics)
• Psoriasis (blood, genetics)