Experimental study on the treatment of cerebral infarction rabbits by ultrasound mediated targeted micro bubbles
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摘要: 目的 探究采用超声介导靶向微泡[自制,含造影剂(全氟显)、血管内皮生长因子165c脱氧核糖核酸(VEGF165c DNA)、抗细胞间粘附因子(ICAM-1)单克隆抗体]治疗脑梗死白兔的动物实验效果,同时观察VEGF165c DNA基因转染对改善受损血管内膜的作用。 方法 选取60只新西兰大白兔,通过高脂饮食制作脑梗死模型,随机分为3组,分别采用超声介导靶向微泡(A组)、爱通立(B组)、生理盐水(对照组)进行治疗,观察各组白兔治疗后血管再通情况、梗死部位坏死区中性粒细胞浸润情况、梗死区质量比重。 结果 治疗后A组及B组血管再通情况优于对照组(P<0.05),但A组与B组血管再通情况比较差异无统计学意义(P>0.05);治疗后A组梗死部位坏死区中性粒细胞平均计数明显少于B组及对照组(P<0.05),但B组与对照组梗死部位坏死区中性粒细胞平均计数对比差异无统计学意义(P>0.05);治疗后A组梗死区质量占比低于B组及对照组(P<0.05),且B组梗死区质量占比低于对照组(P<0.05)。 结论 超声联合靶向微泡介导脑梗死治疗的动物实验VEGF165c DNA基因转染治疗效果较好,能改善血管再通情况,减轻梗死区域的炎性反应,减少梗死区质量占比,有利于治疗脑梗死。Abstract: Objective To investigate effect of animal experiment by ultrasound combined targeted microbubbles[homemade, consist of contrast medium (fluorocarbon), vascular endothelial growth factor165 complementary deoxyribose nucleic acid (VEGF165 c DNA), anti-intercellular adhesion molecule (ICAM-1) monoclonal antibody]mediated therapy for cerebral infarction, and to observe effect by VEGF165 c DNA gene transfection for improving damaged endangium. Methods A total of 60 New Zealand white rabbits were taken into high fat dietingcerebral infarction model, and randomly divided into three groups. They respectively received ultrasound combined targeted microbubbles (group A), actilyse (group B), and normal saline (control gorup) for treatment. Revascularization, neutrophil infiltration in infarction necrotic zone, and infarction area quality proportion were observed in each group. Results After treatment, groups A and B had better revascularization condition than control group (P < 0. 05), while there was no statistically significant difference of revascularization condition between groups A and B (P > 0. 05). Group A had obviously less average neutrophil count in infarction necrotic zone than group B after treatment (P < 0. 05), but the difference of average neutrophil count in infarction necrotic zone had no statistical significance between group B and control group (P > 0. 05). Infarction area quality proportion after treatment was much lower in group A than in group B (P < 0. 05), and that in group B was also lower than that in control group (P <0. 05). Conclusion Ultrasound combined targeted microbubbles mediated provides precise effect in adjuvant therapy for VEGF165 c DNA gene transfection in animal experiment of cerebral infarction. This method can remarkably improve revascularization, decrease inflammatory reaction in infarction area, neutrophil infiltration and infarction area quality proportion.It is beneficial for cerebral infarction treatment.
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Key words:
- Ultrasound /
- Targeted micro bubbles /
- Cerebral infarction /
- Treatment
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