Sphinganine (d20:0) is a natural isomer of dihydro-D-erythro-sphinganine (sphinganine (d18:0); that is a precursor of ceramide and sphingosine as well as a substrate for sphingosine kinases, which generate sphingosine-1-phosphate (d18:1) . In S. cerevisiae, the amount of sphinganine (d20:0) increases 10.8-fold in response to heat stress, indicating it is involved in heat stress adaptation. Sphinganine levels increase significantly in response to certain mycotoxins, including fumonisins as well as in some cancers. Sphinganine can block protein kinase C activation in some cases but not others.
C8 Dihydroceramide acts as a negative control for C8 Ceramide, a cell-permeable analog of natural ceramides. C8 Ceramide, also known as N-Octanoyl-D-erythro-sphingosine, exhibits potent chemotherapeutic properties and anti-proliferation effects. Additionally, it stimulates dendritic cells to enhance T cell responses during viral infections. In vitro studies have also shown that C8 Ceramide induces a slight activation of protein kinase (PKC) [4].
Sphingosine (d18:1), an amino alcohol, is chiefly recognized for its 18-carbon unsaturated hydrocarbon chain. Nevertheless, in mammalian tissues, both sphingosine and its variant, dihydrosphingosine, feature hydrocarbon chains ranging from 12 to 26 carbons. Sphingosine (d15:1) represents a naturally rare variant, serving as an internal standard for chromatographic or spectrometric analyses of sphingoid compounds.