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- W2380260441 abstract "The present study aimed to investigate the mRNA expression levels of collagen, matrix metalloproteinases (MMPs), and tissue inhibitors of metalloproteinases (TIMPs) in the left and right atria in patients with chronic atrial fibrillation (CAF). Forty five patients with valvular heart disease were sampled in this study, including 18 patients with sinus rhythm (SR), 27 patients with CAF. Clinical data of these patients were collected, and the left and right atrial appendages were obtained from these patients during heart valvular replacement surgery. The mRNA levels of collagen type I, collagen type III, MMP1, MMP9, TMP1 of the atria were then measured by semi-quantitative RT-PCR. The results obtained were as follows. Compared to those in SR group, in atria of CAF group, the mRNA levels of collagen type I, MMP1 and MMP9 increased (P 0.05). In CAF group, the mRNA level of MMP1 in the right atrium was higher than that in the left atrium (P<0.05), however, the mRNA level of MMP9 in the left atrium was higher than that in the right atrium (P<0.01). In both the left and right atria, the mRNA of collagen type I was positively correlated with the corresponding atrial diameter; the mRNA of MMP1 and MMP9 was positively correlated with the mRNA of collagen type I, and was negatively correlated with the mRNA of TMP1. These results suggest that the increased level of collagen type I associated with selective upregulation of MMP1, 9 and downregulation of TMP1, 9 in the atrium might be the molecular basis of atrial interstitial fibrosis in patients with CAF. Moreover, during CAF development, there is difference in the expression of MMPs between the left and right atria." @default.
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- W2380260441 date "2009-06-25" @default.
- W2380260441 modified "2023-09-23" @default.
- W2380260441 title "Differential expression of collagen and matrix metalloproteinases between left and right atria in patients with chronic atrial fibrillation" @default.
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