动脉粥样硬化并肢体缺血模型兔接受低频电磁场刺激促进新生血管形成

背景：磁场治疗肢体缺血性疾病的基础研究报道不多，原因是受试动物的依从性差及所受磁场作用强度的稳定性难以掌控，由此造成实验误差大，结果可信度下降。作者针对此类问题，采用磁性饲养笼进行低频电磁治疗缺血肢体的实验研究，由此克服了受试动物依从性差及磁场强度的稳定性难以掌控的两大难题。 目的：探讨自制磁性饲养笼低频电磁场对家兔缺血肢体新生血管生长促进因子表达的影响。 方法：构建动脉粥样硬化模型兔96只，编号随机分入缺血组和无缺血组(每组12个处理组合)，按析因设计要求每组重复实验4次。因素A电磁场作用强度(0，3，6，12 mT)和因素B电磁场作用时间(3，5，7 d)。 结果与结论：低频磁场能够明显促进家兔缺血肢体缺氧诱导因子1α、血管内皮生长因子及CD34表达，磁场作用强度(因素A)是促进缺氧诱导因子1α、血管内皮生长因子及CD34表达的主要因素，作用时间(因素B)为次要因素。低频磁场也促进无缺血肢体缺氧诱导因子1α的表达，但对无缺血肢体血管内皮生长因子及CD34表达无明显促进作用，揭示在肢体缺血状态下血管内皮生长因子及CD34表达除了受缺氧诱导因子1α的调控作用外可能还受其他因素的调控。 中国组织工程研究杂志出版内容重点：肾移植；肝移植；移植；心脏移植；组织移植；皮肤移植；皮瓣移植；血管移植；器官移植；组织工程全文链接：

Low-frequency magnetic fields promote neovascularization in a rabbit model of atherosclerosis combined with limb ischemia

BACKGROUND:Studies on basic research of magnetic treatment of limb ischemic disease are not much, because poor compliance of animals and the stability of the magnetic field strength are difficult to control, resulting in big experimental error and decreased credibility of the results. For this kind of problem, experimental study on low-frequency electromagnetic magnetic cages for treatment of ischemic limbs was conducted, thus overcoming the two major issues of poor compliance of animals and difficult control of the stability of magnetic field strength. OBJECTIVE:To investigate the effects of self-made low-frequency magnetic fields of rabbit cages on neovascular growth-promoting factor of rabbits with limb ischemia. METHODS:A total of 96 rabbit models of atherosclerosis were constructed, numbered and randomly divided into ischemia group and non-ischemia group (12 treatment combination in each group). Experiments in each group were performed four times according to the requirement of factorial design. Electromagnetic field intensity factor A (0, 3, 6, 12 mT) and the time factor B (3, 5, 7 days) were set. RESULTS AND CONCLUSION:Low-frequency magnetic field could apparently promote hypoxia inducible factor-1α, vascular endothelial growth factor and CD34 expression in ischemic limb of rabbits. Electromagnetic field intensity factor A was a key factor for contributing to the expression of hypoxia inducible factor-1α, vascular endothelial growth factor and CD34, and the time factor B was secondary factor. Low-frequency magnetic field also promoted hypoxia inducible factor-1α expression in non-ischemia limb, but did not promote vascular endothelial growth factor and CD34 expression. Thus, the expression of vascular endothelial growth factor and CD34 was regulated by hypoxia inducible factor-1α, as well as other factors, in the ischemic state.