Sphingoid bases as possible diagnostic parameters.

Aim: To determine the concentrations and ratios of sphingoid bases, sphinganine and sphingosine, in the serum and urine of healthy individuals, as a basis for the normal value range, which may be useful in the diagnosis of diseases characterized by sphingolipid metabolism impairment. Possible sex differences were also investigated, as well as effects of hormonal changes on sphingoid base concentrations during pregnancy or menopause.

Method: Sphingolipids were extracted from the serum and urine and hydrolyzed.

Dependence of the sphingoid bases concentration on growth phase and temperature in the yeast Yarrowia lipolytica.

The aim of this research was to investigate the effect of growth phase and temperature on the concentrations of the individual molecular species of sphingoid based obtained by acid hydrolysis of total sphingolipids from the yeast Yarrowia lipolytica. Our results showed C18 phytosphingosine to be the major long-chain base in Y. lipolytica regardless of growth phase or temperature.