ArticlePloS one2013
Cholesterol down-regulates BK channels stably expressed in HEK 293 cells.
Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 20 citations in OpenAlex.
- High-Specificity Spatiotemporal Cholesterol Detection by Quadrature Phase-Shifted Polarization Stimulated Raman Imaging.Angewandte Chemie (International ed. in English) · 2025Article
- KCNN4 as a genomic determinant of cytosolic delivery by the attenuated cationic lytic peptide L17E.Molecular therapy : the journal of the American Society of Gene Therapy · 2025Article
- The Evaluation of Drugs as Potential Modulators of the Trafficking and Maturation of ACE2, the SARS-CoV-2 Receptor.Biomolecules · 2024Article
- The Role of Membrane Lipids in Light-Activation ofBiomolecules · 2022Review
- Structural insights into GIRK2 channel modulation by cholesterol and PIPCell reports · 2021Article
- The Membrane Cholesterol Modulates the Interaction Between 17-βEstradiol and the BK Channel.Frontiers in pharmacology · 2021Article
- Comparison of KHandbook of experimental pharmacology · 2021Article
- Regulation of interleukin-1 beta secretion from macrophages via modulation of potassium ion (KFEBS letters · 2019Article
- Calcium- and voltage-gated BK channels in vascular smooth muscle.Pflugers Archiv : European journal of physiology · 2018Review
- Cholesterol modulates the cellular localization of Orai1 channels and its disposition among membrane domains.Biochimica et biophysica acta. Molecular and cell biology of lipids · 2017Article
- Tyrphostin AG556 increases the activity of large conductance CaJournal of cellular and molecular medicine · 2017Article
- The Natural Flavone Acacetin Blocks Small Conductance CaFrontiers in pharmacology · 2017Article
- Article
- Alcohol Regulates BK Surface Expression via Wnt/β-Catenin Signaling.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2016Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cholesterol is one of the major lipid components of the plasma membrane in mammalian cells and is involved in the regulation of a number of ion channels. The present study investigates how large conductance Ca(2+)-activated K(+) (BK) channels are regulated by membrane cholesterol in BK-HEK 293 cells expressing both the α-subunit hKCa1.1 and the auxiliary β1-subunit or in hKCa1.1-HEK 293 cells expressing only the α-subunit hKCa1.1 using approaches of electrophysiology, molecular biology, and immunocytochemistry. Membrane cholesterol was depleted in these cells with methyl-β-cyclodextrin (MβCD), and enriched with cholesterol-saturated MβCD (MβCD-cholesterol) or low-density lipoprotein (LDL). We found that BK current density was decreased by cholesterol enrichment in BK-HEK 293 cells, with a reduced expression of KCa1.1 protein, but not the β1-subunit protein. This effect was fully countered by the proteasome inhibitor lactacystin or the lysosome function inhibitor bafilomycin A1. Interestingly, in hKCa1.1-HEK 293 cells, the current density was not affected by cholesterol enrichment, but directly decreased by MβCD, suggesting that the down-regulation of BK channels by cholesterol depends on the auxiliary β1-subunit. The reduced KCa1.1 channel protein expression was also observed in cultured human coronary artery smooth muscle cells with cholesterol enrichment using MβCD-cholesterol or LDL. These results demonstrate the novel information that cholesterol down-regulates BK channels by reducing KCa1.1 protein expression via increasing the channel protein degradation, and the effect is dependent on the auxiliary β1-subunit.
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