✦ LIBER ✦

Cholesteryl phosphate and cholesteryl pyrophosphate inhibit formation of the hexagonal phase

✍ Scribed by Richard M. Epand; Remo Bottega; Kelli Robinson

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 356 KB
Volume: 55
Category: Article
ISSN: 0009-3084
DOI: 10.1016/0009-3084(90)90148-k

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✦ Synopsis

The effects of cholesteryl phosphate and cholesteryl sulfate on the Lo--H. phase transition temperature of dielaidoylphosphatidylethanolamine were compared. Both compounds raise the Lo--H, transition temperature. This effect is decreased with decreasing pH. Cholesteryl sulfate is a somewhat better bilayer stabilizer and the effect is observed to lower pH values. Cholesteryl pyrophosphate was synthesized. This compound raises the Lo--H. transition temperature at pH 7.4 to the same extent as does cholesteryl sulfate. It is concluded that charged sterol amphiphiles are good bilayer stabilizers but that this effect is not very sensitive to the nature of the polar group.

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