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- W3148331717 abstract "The relations between membrane cholesterol content, basal (unstimulated) transmembrane 45Ca2+ movements, cytosolic calcium levels, and membrane fluidity were investigated in cultured rabbit aortic smooth muscle cells (SMCs) and isolated SMC plasma membrane microsomes. SMCs were enriched with unesterified (free) cholesterol (FC) for 18-24 hours with medium containing human low density lipoprotein and FC-rich phospholipid (PL) liposomes. This procedure increased cholesterol mass without affecting PL mass, resulting in an increase in the FC/PL molar ratio compared with controls in cells (67% FC increase, p less than 0.001; 43% FC/PL ratio increase, p less than 0.01) and in SMC microsomes (52% FC increase, p less than 0.05; 43% FC/PL ratio increase, p less than 0.05). Cholesterol enrichment also increased unstimulated 45Ca2+ influx (p less than 0.001) and efflux (p less than 0.05). Cellular cholesterol content correlated in a linear fashion with these changes (influx: r = 0.722, p less than 0.01; efflux: r = ..." @default.
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- W3148331717 date "1991-01-01" @default.
- W3148331717 modified "2023-09-24" @default.
- W3148331717 title "Excess membrane cholesterol alters calcium movements, cytosolic calcium levels, and membrane fluidity in arterial smooth muscle cells." @default.
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