title: Simultaneous quantitation of ceramides and 1,2-diacylglycerol in tissues by Iatroscan thin-layer chromatography-flame-ionization detection.
abstract: Ceramides and 1,2-diacylglycerol have been demonstrated in intracellular signaling pathways. A method of simultaneous mass determination of ceramides and 1,2-diacylglycerol in tissues was developed using the latroscan which combines thin layer chromatography and flame ionization detection (TLC/FID) techniques. Because of relatively low amounts of these components in tissues, the fraction of nonpolar lipids, which included ceramides and glycerides, was eluted with chloroform/acetone mixture (3:1, vol/vol) through a silicic acid column to eliminate the polar phospholipids. Development of Chromarods was carried out using three solvent systems in a four-step development technique. The relationship of the peak area ratio to weight ratio compared with cholesteryl acetate added as an internal standard was linear. The amount of ceramides increased with incubation of rat heart homogenate and human erythrocyte membranes in the presence of sphingomyelinase (E.C. 3.1.4.12). The latroscan TLC/FID system provided a quick and reliable assessment of ceramides and 1,2-diacylglycerol.
authors.affiliation: Second Department of Internal Medicine, Nagoya University School of Medicine, Japan. kenji@tsuru.med.nagoya-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Okumura
authors.forename: K
authors.initials: K
authors.lastname: Hayashi
authors.forename: I
authors.initials: I
authors.lastname: Morishima
authors.forename: K
authors.initials: K
authors.lastname: Murase
authors.forename: H
authors.initials: H
authors.lastname: Matsui
authors.forename: Y
authors.initials: Y
authors.lastname: Toki
authors.forename: T
authors.initials: T
authors.lastname: Ito
mesh_terms: D000818:Animals; D002138:Calibration; D002518:Ceramides / Q000032:analysis*; D002855:Chromatography, Thin Layer / Q000295:instrumentation / Q000379:methods; D004075:Diglycerides / Q000032:analysis*; D004910:Erythrocyte Membrane / Q000737:chemistry; D005410:Flame Ionization / Q000295:instrumentation / Q000379:methods; D006801:Humans; D008055:Lipids / Q000302:isolation & purification*; D008297:Male; D009206:Myocardium / Q000737:chemistry; D010743:Phospholipids / Q000302:isolation & purification; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013108:Sphingomyelin Phosphodiesterase
chemical_list: D002518:Ceramides; D004075:Diglycerides; D008055:Lipids; D010743:Phospholipids; D013108:Sphingomyelin Phosphodiesterase