Shedding of Syndecan-4 contributes to inflammation in the left atrial tissue in patients with valvular atrial fibrillation
- VernacularTitle:多配体蛋白聚糖-4脱落在瓣膜性心房颤动患者左心房炎症反应中的作用
- Author:
Huihua YUAN
;
Han WU
;
Ran LI
;
Jun XIE
;
Guannan LI
;
Qinhua CHEN
;
Biao XU
- Publication Type:Journal Article
- Keywords:
Valvular heart disease;
Atrial fibrillation;
In-flammation;
Syndecan-4
- From:
Journal of Medical Postgraduates
2014;(8):820-824
- CountryChina
- Language:Chinese
-
Abstract:
Objective Inflammation plays a critical role in the presence , development and maintenance of atrial fibrillation ( AF) , but it remains unclear what factors induce inflammation in AF patients , especially in those with valvular heart disease ( VHD) . The aim of this paper was to investigate the role of the shedding of Syndecan -4 in left atrial inflammation in patients with valvular atrial fibrillation. Methods Sixty VHD patients scheduled for valvuloplasty or valve replacement surgery were divided into three groups of equal number:sinus rhythm (SR), paroxysmal atrial fibrillation (PaAF), and persistent atrial fibrillation (PeAF).Another 10 pa-tients with congenital heart disease but no valve damage and atrial fibrillation were included in a control group .Baseline clinical data were recorded and tissues were obtained from the left atrial appendage during operation .The expressions of iNOS , HMGB1, and Syn-decan-4 in the left atrium were detected by Western blot , and the pathological changes of the left atrial tissue observed by HE staining . Results Western blot analysis was performed to detect expression levels of proteins .The iNOS level was significantly higher in pa-tients from the paroxysmal AF group (1.61 ±0.10) and persistent AF group (1.67 ±0.08) than those from sinus group (1.06 ± 0.11) and control group (1.02 ±0.12), as was the protein level of HMGB1 (0.63 ±0.05, 0.95 ±0.10, 0.45 ±0.07 and 0.46 ± 0.06 in paroxysmal AF group, persistent AF group, sinus group and controlgroup respectively ).Inflammatory cell infiltration in-creased, while syndecan 4 was down-regulated in AF groups.All these comparisons were significant (P<0.05). Conclusion The decreased expression of Syndecan-4 and enhanced inflammatory response in the left atrial tissue indicate that the shedding of Synde-can-4 may play a role in the presence and development of inflamma-tion in the left atrium .
