Lipid metabolism: sphingolipids- from membrane constituents to signaling molecules that control cell-to-cell communications

Department of Physiology, Cell Biology and Morphology, Lausanne University, Lausanne, Switzerland Correspondence to Christian Widmann, Department of Physiology, Rue du Bugnon 7/9, 1005 Lausanne, Switzerland Tel: +41 21 692 5123; fax: +41 21 692 5255; e-mail: [email protected]