نتایج جستجو برای: chloride channel

تعداد نتایج: 305756  

2017
Michael L Lucas

This historical approach to past CF research shows that the evidence for the mucus hydration view is slender and can be called into question as providing adequate proof. This approach also indicates that associated smooth muscle cell pathophysiology in CF has been overlooked but may prove to be the more productive hypothesis. Present views on the pathophysiology of cystic ibrotic lung function ...

Journal: :The Journal of clinical investigation 1998
N Obermüller N Gretz W Kriz R F Reilly R Witzgall

The mammalian genome encodes at least nine different members of the ClC family of chloride channels. So far only two of them could be localized on a cellular level in the kidney. We now report on the precise intrarenal localization of the mRNAs coding for the chloride channels ClC-2, ClC-3 and ClC-5. Expression of ClC-2 mRNA, encoding a swelling-activated chloride channel, could be demonstrated...

Journal: :American journal of physiology. Cell physiology 2007
John D Lueck Codrin Lungu Ami Mankodi Robert J Osborne Stephen L Welle Robert T Dirksen Charles A Thornton

Transmembrane chloride ion conductance in skeletal muscle increases during early postnatal development. A transgenic mouse model of myotonic dystrophy type 1 (DM1) displays decreased sarcolemmal chloride conductance. Both effects result from modulation of chloride channel 1 (CLCN1) expression, but the respective contributions of transcriptional vs. posttranscriptional regulation are unknown. He...

Journal: :The Journal of General Physiology 2007
Anita M. Engh José D. Faraldo-Gómez Merritt Maduke

ClC-0 is a chloride channel whose gating is sensitive to both voltage and chloride. Based on analysis of gating kinetics using single-channel recordings, a five-state model was proposed to describe the dependence of ClC-0 fast-gate opening on voltage and external chloride (Chen, T.-Y., and C. Miller. 1996. J. Gen. Physiol. 108:237-250). We aimed to use this five-state model as a starting point ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Shashank Bharill Zhu Fu Raz Palty Ehud Y Isacoff

Human Bestrophin 1 (hBest1) is a calcium-activated chloride channel that regulates neuronal excitability, synaptic activity, and retinal homeostasis. Mutations in hBest1 cause the autosomal-dominant Best macular dystrophy (BMD). Because hBest1 mutations cause BMD, but a knockout does not, we wondered if hBest1 mutants exert a dominant negative effect through interaction with other calcium-activ...

Journal: :Plant physiology 1987
F Homblé J M Ferrier J Dainty

Passive transport of potassium through the plasma membrane of a protoplasmic droplet isolated from large internodal cells of Chara corallina Klein ex Willd., em, R.D.W. has been investigated using the patchclamp technique. When the membrane is hyperpolarized the conductance of a single K(+)-channel is of the order of magnitude of 100 picoSiemens and is reduced by tetraethylammonium chloride. It...

Journal: :Lab on a chip 2013
Byung-Ju Jin Eun-A Ko Wan Namkung A S Verkman

We previously developed cell-based kinetics assays of chloride channel modulators utilizing genetically encoded yellow fluorescent proteins. Fluorescence platereader-based high-throughput screens yielded small-molecule activators and inhibitors of the cAMP-activated chloride channel CFTR and calcium-activated chloride channels, including TMEM16A. Here, we report a microfluidics platform for sin...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Adrian Britschgi Anke Bill Heike Brinkhaus Christopher Rothwell Ieuan Clay Stephan Duss Michael Rebhan Pichai Raman Chantale T Guy Kristie Wetzel Elizabeth George M Oana Popa Sarah Lilley Hedaythul Choudhury Martin Gosling Louis Wang Stephanie Fitzgerald Jason Borawski Jonathan Baffoe Mark Labow L Alex Gaither Mohamed Bentires-Alj

The calcium-activated chloride channel anoctamin 1 (ANO1) is located within the 11q13 amplicon, one of the most frequently amplified chromosomal regions in human cancer, but its functional role in tumorigenesis has remained unclear. The 11q13 region is amplified in ∼15% of breast cancers. Whether ANO1 is amplified in breast tumors, the extent to which gene amplification contributes to ANO1 over...

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