RELATIONSHIP BETWEEN CHOLESTEROL SULFATE AND INTERCELLULAR COHESION OF THE STRATUM-CORNEUM - DEMONSTRATION USING A PUSH-PULL METER AND AN IMPROVED HIGH-PERFORMANCE THIN-LAYER CHROMATOGRAPHIC-SEPARATION SYSTEM OF ALL MAJOR STRATUM-CORNEUM LIPIDS

To investigate the role of cholesterol sulfate (CS) as an intercellular glue or cement in the stratum corneum, we compared the relationship between CS levels and magnitude of the intercellular cohesion of the stratum corneum between the palm and the upper arm. Using a push-pull meter, the palm displayed approximately seven times the magnitude of cohesion of the stratum corneum as the upper arm (n = 11). CS and other stratum corneum lipids were extracted from the palm and the upper arm (n = 22) by a cup method and determined by our improved high-performance thin-layer chromatography (HPTLC). Despite a great difference in the magnitude of cohesion (p < 0.01), CS levels and ratios of CS to ceramides and CS to cholesterol in the stratum corneum showed no significant differences between the palm and the upper arm. Our results suggest that differences in CS cannot account for the differences in cohesion between palm and upper arm.