Comparison of differentiated endothelial cells from the embryonic stem cells with human umbilical vein endothelial cells / 中南大学学报(医学版)

Objective:To compare the differentiated endothelial cells from the embryonic stem cells in vitro with human umbilical vein endothelial cells (HUVECs).Methods:Induction of the stem cells HUES9 to endothelial cells follows 2 steps.Stem cells were treated with CHIR99021 (10 μmol/L) and bone morphogenetic protein 4 (25 ng/mL) for 3 days to keep mesoderm state,then subsequent exposure them to VEGF165 (200 ng/mL) and Forskolin (2 μmol/L) to differentiate into endothelial cells.The morphology of differentiated endothelial cells were compared with HUVECs.The surface marker CD144 on differentiated cells and HUVECs were detected.The capabilities of two types of endothelial ceils in migration and angiogenesis were examined.Results:The differentiated endothelial cells show the same morphology with HUVECs.After 6 days of differentiation,the efficiency reached 73.4％.The positive percentage of CD144 for the differentiated endothelial cells and HUVECs was 86.6％ and 94.4％,respectively.Both of them show capabilities of migration and angiogenesis,especially when they were treated with SB431542 to inhibit TGF-β signal pathway.Conclusion:The method for induction of stem cells to endothelial cells is productivity and it can be used for further study.

Circulating miR-214 level and its correlation with the extent of coronary lesion in patients with acute myocardial infarction / 中南大学学报(医学版)

OBJECTIVE@#To examine the circulating levels of miR-214 in acute myocardial infarction (AMI) patients and to explore the relationship between the circulating levels of miR-214 and the degree of coronary lesion.@*METHODS@#A total of 45 patients with AMI (AMI group) were enrolled from Xiangya Hospital of Central South University between September, 2011 and January, 2012. Twenty healthy volunteers served as a normal control group (n=20). According to the coronary artery lesion area, AMI group was also divided into a single-branch group, a double-branch group and a triple-branch group (n=20, 13, 12 respectively). Circulating levels of miR-214 and plasma levels of placental growth factor (PLGF) were measured by real time-PCR assay and enzyme-linked immunosorbent assay respectively on the day when the patients admitted to the hospital. The plasma levels of miR-214 and PLGF were compared among the various branch groups. The correlation between miR-214 and PLGF was analyzed in AMI subgroups.@*RESULTS@#The miR-214 levels in the AMI subgroups were lower than that in the control group. The more decrease in miR-214 level, the larger size of coronary lesion. There was significant difference in the different groups (all P<0.05). Compared with the control group, the levels of plasma PLGF were significantly higher in the AMI subgroups. The more increase in PLGF level, the larger size of coronary lesion. There was significant difference in the different groups (all P<0.05). The plasma levels of miR- 214 were negatively correlated with that of PLGF in the AMI group (r=-0.588, P<0.01).@*CONCLUSION@#The circulating level of miR-214 was significantly decreased in the AMI group, which might be correlated with the extent of the coronary lesion. Circulating miR-214 may be a promising biomarker for the diagnosis and prognosis of severe AMI.

Change of serum MCP-1 level and CCR2 protein expression in isolated monocytes in patients with acute coronary syndrome / 中南大学学报(医学版)

OBJECTIVE@#To investigate the change of serum MCP-1 level and CCR2 expression in isolated monocytes in patients with acute coronary syndrome (ACS) and its possible relationship with ACS pathogenesis.@*METHODS@#Thirty ACS patients and 30 healthy controls were enrolled. Serum MCP-1 levels were determined by ELISA in all subjects. The protein expression of CCR2 in isolated monocytes was assessed by flow cytometry.@*RESULTS@#Serum MCP-1 concentrations in ACS patients were higher than those in healthy controls (P<0.05) and the ratio of CCR2 protein expression in monocytes in ACS patients was higher than that in healthy controls (P<0.01).@*CONCLUSION@#The serum MCP-1 concentrations and protein expression of CCR2 in ACS patients are significantly higher than those in healthy controls, which might be associated with the pathogenesis of ACS.