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转铁蛋白功能化的纳米结构脂质载体诱导脑内皮细胞表达 P-糖蛋白和 BCRP 转运体:治疗阿尔茨海默病的潜在策略的第一步。

Induced expression of P-gp and BCRP transporters on brain endothelial cells using transferrin functionalized nanostructured lipid carriers: A first step of a potential strategy for the treatment of Alzheimer's disease.

机构信息

Department of Pharmacy - Pharmaceutical Sciences, University of Bari "Aldo Moro", Orabona St. 4, 70125 Bari, Italy.

Laboratory of Experimental Pharmacology, IRCCS Istituto Tumori "Giovanni Paolo II", O. Flacco St., 70124 Bari, Italy.

出版信息

Int J Pharm. 2020 Dec 15;591:120011. doi: 10.1016/j.ijpharm.2020.120011. Epub 2020 Oct 22.

Abstract

P-glycoprotein (P-gp) and Breast Cancer Resistance Protein (BCRP) are two transporters expressed in human neural stem/progenitor cells and at the Blood-Brain Barrier (BBB) level with decreased activity in the early stage of Alzheimer's disease (AD). Both proteins, have a protective role for the embryonic stem cells in the early developmental step, maintaining them in an undifferentiated state, and limit the access of exogenous and endogenous agents to the brain. Recently, MC111 selected from a P-gp/BCRP ligands library was investigated as multitarget strategy for AD treatment, considering its ability to induce the expression and activity of both proteins. However, MC111 clinical use could be limited for the ubiquitous physiological expression of efflux transporters and its moderate toxicity towards endothelial cells. Therefore, a selective MC111 delivery system based on nanostructured lipid carriers (NLC) functionalized with transferrin were developed. The results proved the formation of NLC with average size about 120 nm and high drug encapsulation efficiency (EE% greater than 50). In vitro studies on hCMEC/D3 cells revealed that the MC111 was selectively released by NLC at BBB level and then inducing the activity and expression of BCRP and P-gp, involved in the clearance of amyloid β peptide on brain endothelial cells.

摘要

P-糖蛋白(P-gp)和乳腺癌耐药蛋白(BCRP)是两种在人神经干细胞/祖细胞中表达的转运蛋白,在阿尔茨海默病(AD)的早期阶段其活性降低。这两种蛋白在胚胎干细胞的早期发育阶段具有保护作用,使它们保持未分化状态,并限制外源性和内源性物质进入大脑。最近,从 P-gp/BCRP 配体库中筛选出的 MC111 被作为 AD 治疗的多靶点策略进行了研究,因为它能够诱导这两种蛋白的表达和活性。然而,由于外排转运体的广泛生理性表达和对内皮细胞的中度毒性,MC111 的临床应用可能会受到限制。因此,开发了一种基于转铁蛋白功能化的纳米结构脂质载体(NLC)的 MC111 选择性递送系统。研究结果证明了 NLC 的形成,其平均粒径约为 120nm,且具有较高的药物包封效率(EE%大于 50%)。在 hCMEC/D3 细胞的体外研究中,发现 NLC 能够在血脑屏障水平上选择性地释放 MC111,然后诱导 BCRP 和 P-gp 的活性和表达,这与脑内皮细胞中淀粉样β肽的清除有关。

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