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2017 ; 14
(5
): 4231-4237
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Snail1 is positively correlated with atrial fibrosis in patients with atrial
fibrillation and rheumatic heart disease
#MMPMID29104639
Guo F
; Yi X
; Li M
; Fu J
; Li S
Exp Ther Med
2017[Nov]; 14
(5
): 4231-4237
PMID29104639
show ga
The present study investigated the association between Snail1 and atrial fibrosis
in patients with atrial fibrillation (AF) and rheumatic heart disease (RHD) and
to determine the possible mechanism underlying this interrelation. A total of 19
patients were included in the current study and were divided into two groups: A
sinus rhythm (SR) group (n=9) and an AF group (n=10). All patients underwent
heart valve replacement surgery, during which ~200 mg right atrium tissue was
obtained. Hematoxylin and eosin and Masson's trichrome-stained sections were used
to evaluate the morphological changes of cardiomyocytes and the level of
fibrosis. Immunohistochemistry was applied to observe the location and expression
of Snail1. Reverse transcription-quantitative polymerase chain reaction was used
to measure Snail1 mRNA levels. Western blotting was used to determine changes in
the expression of Snail1, as well as in the expression of proteins involved in
the Wnt pathway, including Wnt1, Wnt 3a, Wnt8a, Wnt5a and Wnt11. Compared with
the SR group, expanded cardiomyocytes and higher collagen deposition was detected
in the atrial tissue of the AF group. The expression of Snail1 mRNA and protein
was significantly higher in the AF group than in the SR group (P<0.05).
Additionally, the expression of Wnt1, 3a and 8a in the canonical Wnt signaling
pathway, and Wnt5a and 11 in the noncanonical Wnt signaling pathway were
significantly increased in the AF group. Furthermore, the phosphorylation level
of glycogen synthase kinase 3? (GSK3?) and the levels of ?-catenin and GSK3? were
significantly increased in the AF group compared with the SR group (P<0.05).
Snail1 may be involved in the development and maintenance of atrial fibrosis in
patients with atrial fibrillation and rheumatic heart disease and may be
developed as a novel biomarker to evaluate myocardial fibrosis in the future.
Additionally, the current study suggests that the Wnt signaling pathway may
participate in the process of increased Snail1 expression and atrial fibrosis in
patients with AF and RHD.