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- W2769969480 abstract "Abstract Cholesterol is a key component of the cell plasma membrane. It has been suggested that the t‐tubule membrane of cardiac ventricular myocytes is enriched in cholesterol and that this plays a role in determining t‐tubule structure and function. We have used methyl‐ β ‐cyclodextrin (M β CD ) to deplete cholesterol in intact and detubulated mouse ventricular myocytes to investigate the contribution of cholesterol to t‐tubule structure, membrane capacitance, and the distribution of Ca flux pathways. Depletion of membrane cholesterol was confirmed using filipin; however, di‐8‐ ANEPPS staining showed no differences in t‐tubule structure following M β CD treatment. M β CD treatment had no significant effect on the capacitance:volume relationship of intact myocytes or on the decrease in capacitance:volume caused by detubulation. Similarly, Ca influx and efflux were not altered by M β CD treatment and were reduced by a similar amount following detubulation in untreated and M β CD ‐treated cells. These data show that cholesterol depletion has similar effects on the surface and t‐tubule membranes and suggest that cholesterol plays no acute role in determining t‐tubule structure and function." @default.
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- W2769969480 date "2017-11-01" @default.
- W2769969480 modified "2023-10-10" @default.
- W2769969480 title "Cholesterol depletion does not alter the capacitance or Ca handling of the surface or t-tubule membranes in mouse ventricular myocytes" @default.
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- W2769969480 doi "https://doi.org/10.14814/phy2.13500" @default.
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