Expression of heregulin and ErbB receptors in mesenchymal stem cells  

作　　者：GUI Chun WANG Jian-an HE Ai-na CHEN Tie-long LIU Xian-bao LUO Rong-hua JIANG Jun 

机构地区：[1]Division of Cardiology, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, China

出　　处：《Chinese Medical Journal》2008年第2期155-160,共6页中华医学杂志（英文版）

基　　金：This study was supported by a grant from the National Natural Science Foundation of China （No. 30670868） and the Provincial Natural Science Foundation of Zhejiang （No. R206007）.

摘　　要：Background Mesenchymal stem cells are a promising cell type for cell transplantation in myocardial infarction. Type I neuregulins-1, also known as heregulin, can promote the survival of cardiomyocytes and stimulate angiogenesis. The purpose of this study was to investigate the expression of heregulin and ErbB receptors in mesenchymal stem cells, then further detect the secretion of heregulin and the changes in expression of heregulin and ErbB receptors under conditions of serum deprivation and hvooxia. Methods Mesenchymal stem cells isolated from bone marrow of 180 g male Sprague-Dawley rats were cultured. Passage 3 cells were detected experimentally by regular reverse transcriptase-polymerase chain reaction （RT-PCR）, quantitative real time PCR and Western blotting.Results Heregulin and ErbB receptors were expressed in mesenchymal stem cells, and all three ErbB receptors mRNA expressions were significantly down-regulated by serum deprivation and hypoxia, but serum deprivation and hypoxia significantly increased the protein expression of heregulin. Serum deprivation and hypoxia more than 12 hours could induce the secretion of heregulin.Conclusions Mesenchymal stem cells can express all three ErbB receptors and heregulin. Serum deprivation and hypoxia decrease the mRNA expression of ErbB receptors, increase the expression of heregulin, and activate the secretion of heregulin.Background Mesenchymal stem cells are a promising cell type for cell transplantation in myocardial infarction. Type I neuregulins-1, also known as heregulin, can promote the survival of cardiomyocytes and stimulate angiogenesis. The purpose of this study was to investigate the expression of heregulin and ErbB receptors in mesenchymal stem cells, then further detect the secretion of heregulin and the changes in expression of heregulin and ErbB receptors under conditions of serum deprivation and hvooxia. Methods Mesenchymal stem cells isolated from bone marrow of 180 g male Sprague-Dawley rats were cultured. Passage 3 cells were detected experimentally by regular reverse transcriptase-polymerase chain reaction （RT-PCR）, quantitative real time PCR and Western blotting.Results Heregulin and ErbB receptors were expressed in mesenchymal stem cells, and all three ErbB receptors mRNA expressions were significantly down-regulated by serum deprivation and hypoxia, but serum deprivation and hypoxia significantly increased the protein expression of heregulin. Serum deprivation and hypoxia more than 12 hours could induce the secretion of heregulin.Conclusions Mesenchymal stem cells can express all three ErbB receptors and heregulin. Serum deprivation and hypoxia decrease the mRNA expression of ErbB receptors, increase the expression of heregulin, and activate the secretion of heregulin.

关 键 词：HEREGULIN ErbB receptor mesenchymal stem cell serum deprivation HYPOXIA 

分 类 号：R457[医药卫生—治疗学]