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P-糖蛋白的核酸适配体筛选及应用研究

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P-糖蛋白的核酸适配体筛选及应用研究
Research on Selecting of P-gp Aptamers and Its Application
投稿时间:2020-10-28
DOI:10.15918/j.tbit1001-0645.2020.192
中文关键词:P-糖蛋白SELEX核酸适配体P-糖蛋白外排功能抑制剂
English Keywords:P-gpSELEXaptamersP-gp efflux functioninhibitor
基金项目:国家自然科学基金资助项目(81573693,81973572)
作者单位
李玉娟北京理工大学 生命学院, 北京 100081
梁敏北京理工大学 生命学院, 北京 100081
武广霞北京理工大学 生命学院, 北京 100081
孙欣欣北京理工大学 生命学院, 北京 100081
刘珊北京理工大学 生命学院, 北京 100081
邓玉林北京理工大学 生命学院, 北京 100081
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中文摘要:
基于SELEX技术筛选P-糖蛋白(permeability glycoprotein,P-gp)的特异性核酸适配体(aptamer,Apt),并用酶联免疫吸附测定(ELISA)法、表面等离子体共振(SPR)法表征了Apt与P-gp的结合能力,采用与P-gp结合能力最强的Apt5在人结直肠腺癌细胞(Caco-2)、人脑微管内皮细胞(hCMEC/D3)两种细胞系上考察了对P-gp外排功能的抑制效果.筛选得到10条长度为81 bp的P-gp核酸适配体,结合能力大小顺序为:Apt5>Apt8>Apt1>Apt4>Apt6>Apt10>Apt7>Apt2>Apt9>Apt3.Apt5使hCMEC/D3及Caco-2细胞内罗丹明123的蓄积量分别增加了40.77%(P<0.01),32.39%(P<0.05),能潜在抑制P-gp的外排功能.本研究首次报道了P-gp的多条核酸适配体,与P-gp有较强的结合能力,并能抑制P-gp的外排功能,有望成为P-gp的潜在新型抑制剂.
English Summary:
The SELEX technology was used to select aptamers (Apt) of permeability glycoprotein (P-gp). The enzyme linked immunosorbent assay (ELISA) and surface plasmon resonance (SPR) methods were used to determine the affinity between Apts and P-gp. Apt5 was chosen to evaluate the inhibitory effect on P-gp efflux function with immortalized human brain capillary endothelial cells (hCMEC/D3) and human epithelial colorectal adenocarcinoma cells (Caco-2). As a result, ten of 81bp Apts were selected. The affinity order of Apt was Apt5>Apt8>Apt1>Apt4>Apt6>Apt10>Apt7>Apt2>Apt9>Apt3. Further research showed that Apt5 significantly increased the cellular accumulation of rhodamine 123 both in hCMEC/D3 and Caco-2 cells, with a fold of 40.77% (P<0.01) and 32.39% (P<0.05), respectively, which indicated that Apt5potentially inhibited the efflux function of P-gp. In present study, several Apt of P-gp are presented, which had high affinity with P-gp and could inhibit P-gp efflux function. These Apts might be potential novel P-gp inhibitor.
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