作为OATP1B型运输机的光探针的帕克利塔克塞尔的太平洋蓝色衍生品
Mahesh R Nepal1, Yue Xu1, Yan Jin1
1Division of Pharmaceutics and Pharmacology, The Ohio State University, Columbus, Ohio, USA.
Clinical and translational science
|January 27, 2026
概括
新的光帕克利塔塞尔 (Taxol) 衍生物,PB-taxoids,有效地模仿帕克利塔塞尔的运输和神经毒性. 这些探针有助于研究与OATP载体相关的药物相互作用和毒性.
科学领域:
- 药理学 药理学是指药理学的学科.
- 毒理学 毒理学 毒理学
- 生物化学 生物化学
背景情况:
- 帕克利塔塞尔 (Taxol) 是一种重要的抗癌药物,以其肝脏代谢和剂量限制的外周神经毒性而闻名.
- 有机离子载体多 (OATP1B1和OATP1B3) 调解关键细胞中帕克利塔塞尔的吸收,并且对抑制敏感.
研究的目的:
- 评估PB-Gly-Taxol和PB-GABA-Taxol作为帕克利塔塞尔的光生物标志物探针.
- 评估它们在体外和体内研究中对药物相互作用和毒性概况的有用性.
主要方法:
- 使用转染的HEK293细胞进行运输研究,以评估通过OATP1B/Oatp1b运输体吸收PB-taxoid.
- 在乳腺癌细胞系上进行细胞活力测试.
- 在小鼠体内进行神经毒性研究,以评估Oatp1b2依赖的效果.
主要成果:
- PB-taxoids 通过人类和小鼠OATP1B/Oatp1b 载体的介导显示出高效的吸收,与对照组相比增加了多达100倍.
- 已知的OATP抑制剂抑制了运输.
- 在实验室中,PB-taxoids的细胞毒性较低,但在依赖Oatp1b2.2.的小鼠中诱导了可比的外围神经毒性.
结论:
- PB-taxoids精确地复制了帕克利塔塞尔的运输和毒性动因特征.
- 这些光探针是研究OATP介导的药物相互作用和与帕克利塔塞尔相关的神经毒性的宝贵工具.
相关概念视频
Primary Active Transport
197.9K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
197.9K
Facilitated Transport
147.5K
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
147.5K
Secondary Active Transport
137.7K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
137.7K
Regulated mRNA Transport
7.0K
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
7.0K
Phloem and Sugar Transport
39.9K
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
39.9K
Electron Transport Chains
112.0K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...
112.0K


