Background Bone marrow derived mesenchymal stem cel induced by different inductors individually or collectively. In s （BMdMSCs） can differentiate into cardiomyocyte-like cells this study, by inducing BMdMSCs with p5...Background Bone marrow derived mesenchymal stem cel induced by different inductors individually or collectively. In s （BMdMSCs） can differentiate into cardiomyocyte-like cells this study, by inducing BMdMSCs with p53 inhibitor （p-fifty three inhibitor-alpha, PFT-a）, 5-azacytidine （5-AZA）, angiotensin-II （Ang-II） and bone morphogenic protein-2 （BMP-2） we compared the influences of four inductors on the differentiation of rat BMdMSCs into caridomyocyte like-cells. Methods BMdMSCs were collected from the bone marrow of Sprague Dawley rats and after the fourth generation, the purified cells were divided into five groups： 5-AZA （10 μmol/L）, Ang-II （0.1 μmol/L）, PFT-α （20 μmol/L）, BMP-2 （10μg/L） and control. The purity of the BMdMSCs and the cardiac differentiation rates were obtained by flow cytometry. The expressions of cTnT in the BMdMSCs after four weeks of induction were detected by immunofluorescence and the expressions of cTnl and Cx43 detected by Western blotting. The green fluorescent levels reflecting intracellular calcium transient function were determined by laser scanning confocal microscopy. The total potassium current levels of cells were measured on patch clamp. Results All inductors affected to a different degree the differentiation of BMdMSCs into cardiomyocyte-like cells and the expressions of cTnT, cTnl and Cx43 suggesting that the combination of inductors could be an improved method for cardiac regenerative medicine. In addition, the total potassium current level and calcium transient in PFT-a cardiomyocyte-like cells were higher than other groups. Conclusions The cardiac differentiation of BMdMSCs induced by PFT-α, 5-AZA, Ang-II and BMP-2 has been improved at different levels. PFT-a has an advantage of differentiation rate and electrophysiological function over other inductors.展开更多
目的建立一种简单易行,满足多种药理学实验需要的大鼠DRG神经元急性分离方法,探讨大鼠DRG神经元的电生理特性。方法对160-220 g SD大鼠DRG神经元进行急性分离,并采用全细胞膜片钳技术记录电压门控离子通道钠电流、钙电流和钾电流。结果...目的建立一种简单易行,满足多种药理学实验需要的大鼠DRG神经元急性分离方法,探讨大鼠DRG神经元的电生理特性。方法对160-220 g SD大鼠DRG神经元进行急性分离,并采用全细胞膜片钳技术记录电压门控离子通道钠电流、钙电流和钾电流。结果急性分离的大鼠DRG神经元呈圆形或椭圆形,胞质均一,折光性好,所表达的钠通道电流、钙电流和钾电流符合其电生理特性。结论运用该方法急性分离细胞操作简单易行,容易获得和辨认,电生理特征明确,适用于疼痛等疾病的电生理研究和相关药物的作用机制考察。展开更多
文摘Background Bone marrow derived mesenchymal stem cel induced by different inductors individually or collectively. In s （BMdMSCs） can differentiate into cardiomyocyte-like cells this study, by inducing BMdMSCs with p53 inhibitor （p-fifty three inhibitor-alpha, PFT-a）, 5-azacytidine （5-AZA）, angiotensin-II （Ang-II） and bone morphogenic protein-2 （BMP-2） we compared the influences of four inductors on the differentiation of rat BMdMSCs into caridomyocyte like-cells. Methods BMdMSCs were collected from the bone marrow of Sprague Dawley rats and after the fourth generation, the purified cells were divided into five groups： 5-AZA （10 μmol/L）, Ang-II （0.1 μmol/L）, PFT-α （20 μmol/L）, BMP-2 （10μg/L） and control. The purity of the BMdMSCs and the cardiac differentiation rates were obtained by flow cytometry. The expressions of cTnT in the BMdMSCs after four weeks of induction were detected by immunofluorescence and the expressions of cTnl and Cx43 detected by Western blotting. The green fluorescent levels reflecting intracellular calcium transient function were determined by laser scanning confocal microscopy. The total potassium current levels of cells were measured on patch clamp. Results All inductors affected to a different degree the differentiation of BMdMSCs into cardiomyocyte-like cells and the expressions of cTnT, cTnl and Cx43 suggesting that the combination of inductors could be an improved method for cardiac regenerative medicine. In addition, the total potassium current level and calcium transient in PFT-a cardiomyocyte-like cells were higher than other groups. Conclusions The cardiac differentiation of BMdMSCs induced by PFT-α, 5-AZA, Ang-II and BMP-2 has been improved at different levels. PFT-a has an advantage of differentiation rate and electrophysiological function over other inductors.
文摘目的建立一种简单易行,满足多种药理学实验需要的大鼠DRG神经元急性分离方法,探讨大鼠DRG神经元的电生理特性。方法对160-220 g SD大鼠DRG神经元进行急性分离,并采用全细胞膜片钳技术记录电压门控离子通道钠电流、钙电流和钾电流。结果急性分离的大鼠DRG神经元呈圆形或椭圆形,胞质均一,折光性好,所表达的钠通道电流、钙电流和钾电流符合其电生理特性。结论运用该方法急性分离细胞操作简单易行,容易获得和辨认,电生理特征明确,适用于疼痛等疾病的电生理研究和相关药物的作用机制考察。
