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- W2163122654 abstract "Cholesterol is an important constituent of cellular membranes. It has been suggested that cholesterol segregates into sterol-rich and -poor domains in the plasma membrane, although clear evidence for this is lacking. By fluorescence imaging of the natural sterol dehydroergosterol (DHE), the lateral sterol distribution has been visualized in living cells. The spatial labeling pattern of DHE coincided with surface structures such as ruffles, microvilli, and filopodia with correlation lengths in the range of 0.8–2.5 μm. DHE staining of branched tubules and of nanotubes connecting two cells was detected. Dynamics of DHE in folded and plane membrane regions was comparable as determined by fluorescence recovery after photobleaching. DHE colocalized with fluid membrane-preferring phospholipids in surface structures and at sites of cell attachment as well as in the cleavage furrow of dividing cells, but it was not particularly enriched in those regions. Fluorescent sterol showed homogeneous staining in membrane blebs induced by F-actin disruption. Cross-linking the ganglioside GM1—a putative raft marker—did not affect the cell surface distribution of DHE. The results suggest that spatial heterogeneities of plasma membrane staining of DHE resolvable by light microscopy reflect the cell surface topography but not phase-separated sterol domains in the bilayer plane." @default.
- W2163122654 created "2016-06-24" @default.
- W2163122654 creator A5090901298 @default.
- W2163122654 date "2007-01-01" @default.
- W2163122654 modified "2023-09-26" @default.
- W2163122654 title "Plasma Membrane Sterol Distribution Resembles the Surface Topography of Living Cells" @default.
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- W2163122654 doi "https://doi.org/10.1091/mbc.e06-05-0445" @default.
- W2163122654 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1751316" @default.
- W2163122654 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17065557" @default.
- W2163122654 hasPublicationYear "2007" @default.