| Methyl beta-cyclodextrin reduces accumulation of reactive oxygen species and cell death in yeast. | |
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MedLine Citation:
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PMID: 19272445 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Stabilized F-actin structures have been shown to be detrimental to both mammalian and yeast cells. In yeast, stabilization of actin caused by addition of jasplakinolide, by point mutations in the act1 gene, or by deletion of certain genes that regulate F-actin leads to cell death with hallmarks of apoptosis. In particular, there is an elevation in the levels of reactive oxygen species, and we have shown the importance of the Ras/cAMP pathway for this effect. Here we show that in yeast cells deleted for end3, which functions to regulate actin organization during endocytosis, treatment of cells with methyl beta-cyclodextrin reduces levels of reactive oxygen species and inhibits cell death progression. Methyl beta-cyclodextrin is widely used to disrupt lipid rafts that contain cholesterol. The mechanism through which the rescue is achieved was investigated and we demonstrate that methyl beta-cyclodextrin reduces accumulation of Ras2 at the plasma membrane in Deltaend3 cells. We use FRAP and live cell imaging to determine the possible mechanism through which methyl beta-cyclodextrin functions to elicit this effect on Ras2 localization. Finally, we demonstrate that addition of methyl beta-cyclodextrin to wild-type cells can act to protect cells from acute oxidative stress caused by addition of hydrogen peroxide. |
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Authors:
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Wei Du; Kathryn R Ayscough |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-03-09 |
Journal Detail:
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Title: Free radical biology & medicine Volume: 46 ISSN: 1873-4596 ISO Abbreviation: Free Radic. Biol. Med. Publication Date: 2009 Jun |
Date Detail:
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Created Date: 2009-05-04 Completed Date: 2009-12-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8709159 Medline TA: Free Radic Biol Med Country: United States |
Other Details:
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Languages: eng Pagination: 1478-87 Citation Subset: IM |
Affiliation:
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Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Actins
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genetics,
metabolism Animals Apoptosis Cell Membrane Cytoprotection Cytoskeletal Proteins / genetics*, metabolism Endocytosis Ergosterol / metabolism Fluorescence Recovery After Photobleaching Hydrogen Peroxide / metabolism Oxidative Stress Protein Stability Protein Transport Reactive Oxygen Species / metabolism Saccharomyces cerevisiae / physiology* Saccharomyces cerevisiae Proteins / genetics*, metabolism Sequence Deletion Signal Transduction beta-Cyclodextrins / metabolism* ras Proteins / metabolism |
| Grant Support | |
ID/Acronym/Agency:
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G117/394//Medical Research Council |
| Chemical | |
Reg. No./Substance:
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0/Act1 protein, S cerevisiae; 0/Actins; 0/Cytoskeletal Proteins; 0/END3 protein, S cerevisiae; 0/Reactive Oxygen Species; 0/Saccharomyces cerevisiae Proteins; 0/beta-Cyclodextrins; 0/methyl-beta-cyclodextrin; 57-87-4/Ergosterol; 7722-84-1/Hydrogen Peroxide; EC 3.6.5.2/RAS2 protein, S cerevisiae; EC 3.6.5.2/ras Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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