人心房肌细胞分离方法的改良研究

摘要

Objective To study an improved isolated method of single human atrial myocytes.Methods Enzyme digestion method was used to isolate single myocytes from human atrial and whole-cell patch clamp technique was used to record small conductance calcium activated potassium current.Results This method obtained a large number of atrial myocytes.The total amount of atrial myocytes in SR group was 320±30 while AF group was 230±20 and the difference was statistically significant(P<0.01).In this study,a large number of simple and striated single atrial myocytes were obtained,and a typical small-conductance calcium-activated potassium channel current was recorded on the isolated atrial myocytes.Conclusion The established isolated method is simple,stable and effective.We can acquire a large amount of single atrial myocytes with good quality.%目的 探索改良的人心房肌细胞分离方法.方法 采用两步酶消化法急性分离人心房肌细胞,采用膜片钳全细胞记录技术记录小电导钙激活钾通道.结果 该分离方法可获得数量较多的心房肌细胞,窦性心律患者可获得完整有横纹细胞320±30,慢性房颤患者可获得完整有横纹细胞230±20,比较差异有统计学意义(P<0.01).该方法可获得大量形态完整,横纹清晰的单个人心房肌细胞,且能在所分离的心房肌细胞上记录到典型的小电导钙激活钾通道电流.结论 该试验所采用的分离方法简便,稳定有效,可获得细胞数量多和细胞质量好的单个人心房肌细胞.