相关实验视频

Updated: May 5, 2026

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Published on: July 11, 2012

表面修饰在肺癌细胞中CdTe量子点和ABC载体之间的相互作用中的作用

Yu Zheng¹, Tongkuo Yuan¹, Iqra Arooj²

¹School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou, Jiangsu, 215163, PR China; CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu, 215163, PR China.

Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

|November 23, 2024

概括

Telluride 量子点 (QD) 的表面修饰会影响它们与肺癌细胞中的 ABC 载体的相互作用. 这项研究阐明了QD流量机制,有助于环境排毒策略.

科学领域:

纳米技术纳米技术
生物化学生物化学
细胞生物学细胞生物学

背景情况:

化量子点 (CdTe QD) 是一种纳米材料,在生物医学成像和治疗中具有应用.
耐多克索鲁比肺癌细胞 (A549/DOX) 由于药物排放机制,在治疗中存在挑战.
ATP结合盒 (ABC) 载体在各种化合物,包括药物和潜在的纳米材料的细胞外流中发挥着至关重要的作用.

研究的目的:

研究CdTe QD的表面修饰如何影响它们与A549/DOX细胞中的ABC载体的相互作用.
阐明表面电荷 (负与正) 在QD细胞吸收,积累和毒性的作用.
了解由ABC传送器介导的CdTe QD流出的特定机制.

主要方法:

合成和修改了CdTe QDs与谷氨 (GSH),碳氧 (COOH) 和氨基 (NH2) 组,从而产生负电荷和正电荷纳米粒子.
进行了细胞活力测试,以评估A549/DOX细胞中不同QD的毒性.
细胞内QD积累在存在或缺少ABC载体抑制剂时被测量.
分析了ABC载体的mRNA表达水平,以确定QD是否诱导它们的表达.

主要成果:

所有测试的CdTe QD都以度依赖的方式降低了细胞活力,NH2-CdTe QD (正电荷) 显示出更高的毒性.
带正电荷的NH2-CdTe QDs在细胞中表现出增强的粘附和积累,这可能是由于与负电荷细胞膜的相互作用.
抗ABC载体抑制剂显著增加了负电荷的QDs (GSH和COOH-CdTeQDs) 的细胞内积累和毒性,这表明它们在分泌这些QDs中的作用.
相反,载体抑制剂对NH2-CdTe QDs的影响很小或逆转,这表明ABC载体主要是负电荷的QDs的排放.
CdTe QDs对ABC载体的mRNA表达的影响很小,可能是由于膜破坏效应.

结论:

而ABC载体主要介导来自A549/DOX细胞的负电荷的CdTe QDs的流出.
CdTe QDs的表面修饰和由此产生的电荷显著影响它们与细胞外流系统的相互作用和整体毒性.
了解这些相互作用对于设计更安全的纳米材料和开发QDs环境排毒策略至关重要.

关键词:

美国ABC运输商ABC运输商耐多克索鲁比的肺癌细胞具有耐药性.量子点是一个量子点.表面的修改是表面的修改.泽塔潜力是什么意思

更多相关视频

Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

Encapsulation of Cancer Therapeutic Agent Dacarbazine Using Nanostructured Lipid Carrier

Encapsulation of Cancer Therapeutic Agent Dacarbazine Using Nanostructured Lipid Carrier

Published on: April 26, 2016

相关概念视频

ABC Transporters: Exporter

ABC Transporters: Exporter

ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...

ABC Transporters: Importer

ABC Transporters: Importer

ATP-binding cassette or ABC transporters are a class of ATP-driven pumps that hydrolyze ATP to move solutes across the membrane. They can be grouped into importers and exporters. While exporters are present in all domains of life, importers exist only in bacteria and some plants.
In bacteria, based on the number of transmembrane helices and the chemical nature of their substrates, the ABC importers can be divided into three types: