相关实验视频
Updated: Jun 29, 2025

06:03
Delivery of Modified mRNA in a Myocardial Infarction Mouse Model
Published on: June 11, 2020
9.1K
在血管系统中通过LNP介导的mRNA输送的生理基础建模
Hamideh Parhiz1, Vladimir V Shuvaev2, Qin Li1
1Division of Infectious Diseases, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Molecular therapy. Nucleic acids
|April 5, 2024
概括
为mRNA-脂质纳米颗粒 (LNP) 开发一种基于生理学的模型有助于预测药物递送和基因表达,弥合RNA治疗的药理动力学-药理动力学差距.
科学领域:
- 生物医学工程 生物医学工程
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- 包括mRNA-脂质纳米颗粒 (LNP) 在内的RNA疗法在治疗各种疾病方面显示出很大的前景.
- 一个关键的挑战是理解药物递送动力学与治疗效果之间的联系.
- RNA药物的延迟起作用使药理动力学 (PK) 和药理动力学 (PD) 评估复杂化.
研究的目的:
- 开发一种基于生理学的PK/PD模型,用于在小鼠体内系统注射的mRNA-LNP.
- 描述LNP的PK和转基因表达的动力学.
- 为了验证模型对LNP传递和基因表达的预测准确性.
主要方法:
- 为mRNA-LNP创建了一个基于生理学的PK/PD模型.
- 该模型结合了mRNA传递,血管向和纳米粒子涂层效应等因素.
- 使用ex vivo测定和in vivo生物发光成像收集PK/PD数据.
主要成果:
- 该模型准确地描述了LNP血液和组织的药理动力学.
- 它成功地描述了组织特异性转基因表达的动力学.
- 对于纳米粒子传递和基因表达的模型预测在器官之间是2倍的误差.
结论:
- 开发的建模平台有效地预测了mRNA-LNP的体内行为.
- 这种方法可以指导RNA疗法的发展,用于各种疾病.
- 该模型为预测跨物种和各种应用的LNP行为提供了基础.
相关概念视频
Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models
78
Physiological pharmacokinetic models, often called flow-limited or perfusion models, typically assume a swift drug distribution between tissue and venous blood, creating a rapid drug equilibrium. This premise is based on the idea that drug diffusion is extremely fast, and the cell membrane presents no barrier to drug permeation. In this scenario, where no drug binding occurs, the drug concentration in the tissue equals that of the venous blood leaving the tissue. This greatly simplifies the...
78
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
38
Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
A recent model describes pravastatin's hepatobiliary excretion,...
A recent model describes pravastatin's hepatobiliary excretion,...
38
Regulated mRNA Transport
6.3K
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...
6.3K
Model Approaches for Pharmacokinetic Data: Physiological Models
43
Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
43

