相关实验视频

Updated: Jan 8, 2026

Functional Reconstitution and Channel Activity Measurements of Purified Wildtype and Mutant CFTR Protein

Functional Reconstitution and Channel Activity Measurements of Purified Wildtype and Mutant CFTR Protein

Published on: March 9, 2015

对W1282X CFTR药理学救援的障碍

Candela Manfredi¹, Andras Rab¹, Disha Joshi¹

¹Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia 30322, United States.

|December 12, 2025

概括

在阿什基纳兹犹太人群体中常见的W1282X囊性纤维化跨膜导电性调节器 (CFTR) 变体,在现有的CFTR调节器中表现出更好的功能. 这些药物,通常用于F508del突变,意外地增强了W1282X CFTR的表达和活性.

科学领域:

生物化学生物化学
遗传学是一个遗传学.
药理学药理学是指药理学的学科.

背景情况:

W1282X变种是亚什肯纳兹犹太人的囊性纤维化 (CF) 的普遍原因.
目前没有针对W1282X CFTR的向药物治疗方法.
了解W1282X CFTR突变机制对于开发有效治疗方法至关重要.

研究的目的:

调查现有的CFTR调节器对W1282X变异的疗效.
阐明调制剂影响W1282X CFTR的潜在机制.
探索W1282X相关的囊性纤维化新的治疗策略.

主要方法:

在体外对W1282X CFTR表达细胞进行治疗,使用CFTR增强剂 (例如VX-770) 和校正剂 (例如VX-809,VX-661).
评估W1282X CFTR蛋白表达,表面定位和离子运输功能.
用G551D CFTR进行的分子动力学模拟和福斯科林剂量反应研究.
在W1282X CFTR上对读透剂 (G418) 和蛋白酶体抑制剂 (ALLN) 的研究.

主要成果:

VX-770 (增强剂) 在血膜中增加了W1282X CFTR,表现出类似校正器的功能.
已批准的校正器 (VX-809,VX-661) 增强了W1282X CFTR依赖的离子运输.
读透剂G418意外增加了W1282XmRNA和表面蛋白质,增强了CFTR功能.
蛋白质酶阻断部分挽救了W1282X CFTR在血上的作用.

结论:

现有的CFTR调节器对W1282X变种表现出意想不到的疗效,它们既起着校正作用,又起着增强作用.
机制研究表明,校正剂可以通过改变蛋白质构造来急剧增强CFTR门.
像W1282X这样的罕见CFTR变异的调节器功能可能与F508delCFTR的已知影响有很大差异,需要量身定制的治疗方法.

更多相关视频

Forskolin-induced Swelling in Intestinal Organoids: An In Vitro Assay for Assessing Drug Response in Cystic Fibrosis Patients

Forskolin-induced Swelling in Intestinal Organoids: An In Vitro Assay for Assessing Drug Response in Cystic Fibrosis Patients

Published on: February 11, 2017

Purification of the Cystic Fibrosis Transmembrane Conductance Regulator Protein Expressed in Saccharomyces cerevisiae

Purification of the Cystic Fibrosis Transmembrane Conductance Regulator Protein Expressed in Saccharomyces cerevisiae

Published on: May 10, 2014

相关概念视频

Cystic Fibrosis: Management

Cystic Fibrosis: Management

Cystic fibrosis (CF) is an autosomal recessive disorder that predominantly affects individuals of Northern European descent, occurring at a rate of 1 in 3500. It is caused by a genetic mutation in a gene on chromosome 7, most commonly the ΔF508 mutation, that codes for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. This results in thicker mucus secretions and obstruction pathologies in multiple organs, including the lungs and sinuses.
Sinus disease and chronic...

Cystic Fibrosis: Pathogenesis

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...