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三角波形低频脉冲磁场对大鼠心肌微血管内皮细胞增殖、迁移和细胞周期的影响 被引量:3

Effects of triangular low-frequency pulsed magnetic fields on proliferation,migration and cell cycle of cardiac microvascular endothelial cells
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摘要 目的:研究在固定时间和频率下,三角波形的低频脉冲磁场(LF-PMF)对大鼠心肌微血管内皮细胞(CMECs)增殖、迁移以及细胞周期的影响。方法:实验分为4组(对照组,1.0mT组,1.4mT组,1.8mT组)。对照组不加磁场干预;其余各组分别在频率为15 Hz,磁场强度分别为1.0mT、1.4mT和1.8mT,时间为4 h/d,连续照射3 d的条件下,用三角波形作用离体培养的大鼠CMECs。利用MTT法检测细胞增殖情况,transwell法观察细胞迁移状况,流式细胞仪技术检测细胞周期变化。结果:1.4 mT和1.8 mT组磁场促进CMECs增殖的作用差异显著[(0.200±0.043)A值,vs.(0.159±0.037)A值,(0.225±0.042)A值,vs.(0.159±0.037)A值,P<0.05]。迁移能力与对照组相比也有显著提高[(27.20±4.76)个/视野vs.(22.60±4.77)个/视野,(33.80±3.19)个/视野vs.(22.60±4.77)个/视野,P<0.05]。CMECs在细胞周期中的分布发生改变,DNA合成期(S期)和合成后期(G2期)细胞的比例增加。1.0mT组LF-PMF胞对细胞增殖、迁移以及细胞周期的影响均不明显。结论:低频脉冲磁场磁场对CMECs的生物学作用与磁场的强度相关,1.4mT和1.8mT组LF-PMF促进细胞增殖、迁移及使其DNA合成的能力提高。 AIM:To investigate the effects of low-frequency pulsed magnetic fields(LF-PMFs) on the proliferation,cell cycle and migration of cardiac microvascular endothelial cells(CMECs).METHODS:Cells were randomly divided into four groups(control group,1.0 mT group,1.4 mT group and 1.8 mT group).CMECs(except for those in the control group) were exposed to triangular low-frequency pulsed magnetic fields(15 Hz) for 4 h every day and cultured for 3 days.RESULTS:After a 3-day intervention,1.4 mT and 1.8 mT magnetic fields were found to have accelerated the proliferation [(0.200±0.043)A vs.(0.159±0.037)A,(0.225±0.042)A,vs.(0.159±0.037)A,P〈0.05] and the migration(27.20±4.76 vs.22.60±4.77;33.80±3.19 vs.22.60±4.77,P〈0.05) of CMECs.The percentage of cells at the S+G2 phase increased,but no obvious changes were observed in the 1.0 mT group(P〈0.05).CONCLUSION:LF-PMFs of 1.4 mT and 1.8 mT accelerate proliferation and migration of CMECs.The percentage of cells at the S+G phase increases.
出处 《心脏杂志》 CAS 2011年第1期73-76,共4页 Chinese Heart Journal
基金 国家自然科学基金项目资助(30600580)
关键词 心肌微血管内皮细胞 低频脉冲磁场 细胞增殖 细胞迁移 细胞周期 low-frequency pulsed magnetic fields; cardiac microvascular endothelial cells; proliferation; cell cycle; migration;
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