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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Local insulin application on the carotid artery inhibits neointima formation
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Local insulin application on the carotid artery inhibits neointima formation

机译:颈动脉局部应用胰岛素可抑制新内膜形成

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Anti-mitogenic agents currently used to prevent restenosis in drug-eluting stents delay re-endothelialization. Delayed re-endothelialization is now considered as the main cause of late stent thrombosis with drug-eluting stents, which emphasizes the need for new treatments. We have shown that systemic insulin treatment decreases neointimal growth and accelerates re-endothelialization after arterial injury in a rat model of restenosis. However, systemic insulin treatment cannot be given to non-diabetic individuals because of the risk of hypoglycemia. Thus, we investigated whether local insulin treatment is also effective in reducing neointimal growth after arterial injury. Rats were given local vehicle or local insulin delivered via Pluronic gel applied around the carotid artery immediately following balloon injury. Plasma glucose and systemic insulin levels were not affected by local insulin treatment. Insulin decreased inthnal area at 28 days (P < 0.05) and also inhibited vascular smooth muscle cell migration by 60% at 4 days (P < 0.05). NPH (a longer-lasting insulin) also decreased neointimal area. These results indicate that local insulin treatment can lead to decreased restenosis, suggesting a protective vascular effect of insulin in vivo and that local insulin treatment, possibly via insulin-eluting stents, may be clinically relevant.
机译:当前用于预防药物洗脱支架中再狭窄的抗促有丝分裂剂会延迟重新内皮化。现在,延迟的重新内皮化被认为是药物洗脱支架导致晚期支架血栓形成的主要原因,这强调了对新疗法的需求。我们已经显示,在再狭窄的大鼠模型中,全身性胰岛素治疗可减少新内膜生长并加速动脉损伤后的内皮再形成。但是,由于存在低血糖的风险,因此无法对非糖尿病患者进行全身性胰岛素治疗。因此,我们调查了局部胰岛素治疗是否还有效减少动脉损伤后新内膜的生长。给予大鼠球囊损伤后立即通过颈动脉周围施用Pluronic凝胶递送的局部赋形剂或局部胰岛素。血浆葡萄糖和全身性胰岛素水平不受局部胰岛素治疗的影响。胰岛素在28天时减少了血流面积(P <0.05),并且在4天时也抑制了60%的血管平滑肌细胞迁移(P <0.05)。 NPH(持续时间更长的胰岛素)也减少了新内膜面积。这些结果表明局部胰岛素治疗可导致再狭窄的减少,表明胰岛素在体内具有保护性血管作用,并且可能通过胰岛素洗脱支架进行局部胰岛素治疗可能与临床相关。

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