中华医学杂志（英文版）2009，Vol.122Issue(2)：183-187,5.DOI:10.3760/cma.j.issn.0366-6999.2009.02.014
Chemokine stromal cell-derived factor 1/CXCL12 increases homing of mesenchymal stem cells to injured myocardium and neovascularization following myocardial infarction
Chemokine stromal cell-derived factor 1/CXCL12 increases homing of mesenchymal stem cells to injured myocardium and neovascularization following myocardial infarction
ZHUANG Yu 1CHEN Xin 1XU Ming 1ZHANG Lei-yang 1XIANG Fei1
作者信息
- 1. Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210006, China
- 折叠
摘要
Abstract
Background Heart failure due to ischemic heart disease is still a major health problem. Myocardium regeneration emerges as a novel therapeutic method for treating myocardial infarction (MI). However, it is affected by many factors. The present study was aimed to investigate the effect of chemokine stromal cell-derived factor 1 (SDF-1)/CXCL12 on mesenchymal stem cells (MSCs) homing to injured myocardium in a rat myocardial infarction model. Methods A rat myocardial infarction model was established by permanent left anterior descending branch ligation. Mesenchymal stem cells from donor rats were cultured in IMDM and labeled with bromodeoxyuridine. The rats were divided into two groups. SDF-1 expression was measured by in situ hybridization and immunohistochemistry in the sham operated or infarcted hearts at 1, 2, 4, 7, 14 and 28 days post operation in the SDF-1 detection group. The rats in the intervention groups were injected with SDF-1, anti-SDF-1 antibody or saline 4 days after myocardial infarction. Then, a total of 5x106 cells in 2.5 ml of phosphate-buffered saline were injected through the tail vein. The number of the labeled MSCs in the infarcted hearts was counted on the 3rd clay post injection. Cardiac function and blood vessel density were assessed on the 28th day post injection. Results Self-generating SDF-1 expression was increased at the first day post MI, peaked at the 7th day and decreased thereafter while it remained unchanged in sham operated hearts. The MSCs enrichment in the host hearts were more abundant in the MI groups than in the non-MI group (P=0.000); the MSCs enrichment in the host hearts were more abundant in the SDF-1 injected group than in the anti-SDF-1 antibody and saline injected groups (P = 0.000). Cardiac function was improved more in the SDF-1 injected group than in the anti-SDF-1 antibody and saline injected groups (P = 0.000). Neovascularization in the SDF-1 injected group increased significantly compared to the other groups (P = 0.000). Conclusion Myocardial SDF-1 expression was increased only in the early phase post MI. SDF-1 may enhance MSCs homing to the injured heart and improve cardiac function by promoting neovascularization.关键词
mesenchymal stem cells/homing behavior/myocardial infarction/chemokine CXCL12Key words
mesenchymal stem cells/homing behavior/myocardial infarction/chemokine CXCL12分类
医药卫生引用本文复制引用
ZHUANG Yu,CHEN Xin,XU Ming,ZHANG Lei-yang,XIANG Fei..Chemokine stromal cell-derived factor 1/CXCL12 increases homing of mesenchymal stem cells to injured myocardium and neovascularization following myocardial infarction[J].中华医学杂志（英文版）,2009,122(2):183-187,5.
