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Extracorporeal cardiac shock wave therapy ameliorates myocardial fibrosis by decreasing the amount of fibrocytes after acute myocardial infarction in pigs.
MedLine Citation:
PMID:  23839111     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVES: Extracorporeal shock wave (SW) therapy ameliorates cardiac remodeling after acute myocardial infarction (AMI). However, it remains to be examined whether and how SW therapy ameliorates myocardial fibrosis after AMI. Fibrocytes are associated with myocardial fibrosis. Thus, we examined whether SW therapy ameliorates myocardial fibrosis and whether fibrocytes are associated after AMI in pigs.
MATERIALS AND METHODS: AMI was created by coronary embolism. Twenty-five pigs were divided into three groups: AMI+SW group (AMI with SW therapy, n=15), AMI group (without SW therapy, n=5), and sham+SW group (SW therapy without AMI, n=5). The collagen area fraction was examined by Masson's trichrome staining. The presence of fibrocytes was identified by immunofluorescence and confocal microscopy. The location of CXCL12 was examined by immunohistochemistry.
RESULTS: Compared with the AMI group, the AMI+SW group showed significantly ameliorated myocardial fibrosis in terms of collagen area fraction (27.21±8.13 vs. 10.13±4.96, P<0.05) and reduced fibrocytes (CD34/α-smooth muscle actin: 35.40±11.72 vs. 12.27±7.71, P<0.05; CXCR4/α-smooth muscle actin: 40.80±8.96 vs. 16.54±6.38, P<0.05). There were positive correlations between the collagen area fraction and the number of fibrocytes (r=0.936; P<0.05) and between the number of CXCR4 fibrocytes and the SDF-1/CXCL12 cells (r=0.802; P<0.05) in the three groups.
CONCLUSION: The results show that SW therapy ameliorates myocardial fibrosis after AMI in pigs, which is associated with the decreased amount of fibrocytes.
Pu-Ping Lei; Si-Ming Tao; Qun Shuai; Yu-Xia Bao; Shang-Wen Wang; Yong-Qiang Qu; Dian-Hua Wang
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Coronary artery disease     Volume:  24     ISSN:  1473-5830     ISO Abbreviation:  Coron. Artery Dis.     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-07-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9011445     Medline TA:  Coron Artery Dis     Country:  England    
Other Details:
Languages:  eng     Pagination:  509-15     Citation Subset:  IM    
aDepartment of Forensic Medicine, Kunming Medical University bDepartment of Cardiovascular Medicine, The Fourth Affiliated Hospital of Kunming Medical University cDepartment of Forensic Medicine, Yunnan Judicial Police Professional College dDepartment of Laboratory Medicine, The First Affiliated Hospital of Kunming Medical University eCompilation Branch of the Journal of Kunming Medical University, Kunming Medical University, Kunming, Yunnan Province, China.
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