J Am Soc Nephrol:局部应用纳米颗粒包裹的1α,25(OH)2D3可预防动静脉瘘的静脉内膜增生和静脉狭窄形成

2021-02-26 MedSci原创 MedSci原创

很少有疗法能预防动静脉瘘(AVF)中的静脉内膜增生(VNH)和静脉狭窄(VS)形成。

很少有疗法能预防动静脉瘘(AVF)中的静脉内膜增生(VNH)和静脉狭窄(VS)形成。即刻早期反应基因X-1(lex-1,又被称为ler3)的表达,被认为与小鼠AVF的VNH和血管狭窄有关。

本研究旨在确定包埋在温敏性Pluronic F127水凝胶(1,25NP)中的聚乳酸-乙醇酸共聚物(PLGA)纳米粒子中的ler3的长效抑制剂1α-25(OH)2D3的局部释放是否会影响大型动物模型中的VNH/VS形成

在猪肾功能衰竭模型中建立了AVF后,立即向AVF流出静脉的外膜间隙注射1,25NP或对照颗粒。采用扫描电镜和动态光散射表征药物和对照颗粒。分别在3天和28天后处死动物进行基因表达、免疫组织学、磁共振成像和血管造影以及超声分析。对AVF流出静脉进行全转录组RNA测序和差异基因表达分析。

将1α,25(OH)2D3包裹在PLGA纳米粒中,形成大小均匀的纳米粒,与未包埋1α,25(OH)2D3的纳米粒相似。

用1,25NP处理的AVF具有较低的VNH/VS、ler3基因表达和IER-3、MCP-1、CD68、HIF-1α及VEGF-A免疫染色、纤维化和增殖。用1,25NP处理的AVF的血流和血管管腔面积明显增加,收缩期峰值速度和室壁切应力明显降低。治疗增加了杨氏模量,并与纤维化的组织学评估相关,且没有血管钙化的证据。测序分析显示与炎症、转化生长因子β-1和凋亡通路相关的基因表达发生了变化。

总之,在动静脉瘘猪模型中,局部释放1,25NP改善了动静脉瘘的血流和血流动力学,减少了狭窄、炎症、细胞凋亡和纤维化的发生。

原始出处:

Singh Avishek K,Cai Chuanqi,Kilari Sreenivasulu et al. 1α,25-Dihydroxyvitamin D Encapsulated in Nanoparticles Prevents Venous Neointimal Hyperplasia and Stenosis in Porcine Arteriovenous Fistulas. J Am Soc Nephrol, 2021, 10.1681/ASN.2020060832

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    2021-10-01 fusion
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    2021-02-28 chg122
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    2021-02-26 T2DM终结者

    纳米药物?

    0

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