Record and his colleagues timely focus their manuscript on another type of lipidic structure released by cells in addition to lipoproteins, namely the exosomes. These nanovesicles transfer intracellular ma- terials, including lipids, from cell to cell. Their involvement in cholesterol-related diseases is highlighted herein. Micro- and nano-membrane domains that are rich in cholesterol and sphingo- lipids play pivotal roles in cell physiology. Defects in the biosyn- thesis and recycling of such membrane domains can alter brain function and global lipid homeostasis as described in a review from Thierry Galli and Diana Molino. Lipids are transported be- tween membranes in intracellular compartments. The proteins that favor lipid exchanges are named StAR related proteins (START). This large family of proteins is fascinating and it was shown that mutations or deregulated expression of STARTs was linked to pa- thologies like autoimmune diseases and cancers. These aspects and the START-related transfer mechanisms are extensively reviewed in a paper from Fabien Alpy and Catherine Tomasetto. We decided to advertise these proteins in the front cover of the cur- rent issue.