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Taniguchi, Makoto; Okazaki, Toshiro
Biochimica et biophysica acta, 05/2014, Letnik: 1841, Številka: 5Journal Article
Sphingomyelin constitutes membrane microdomains such as lipid raft, caveolae, and clathrin-coated pits and implicates in the regulation of trans-membrane signaling. On the other hand, sphingomyelin emerges as an important molecule to generate bioactive sphingolipids through ceramide. Sphingomyelin synthase is an enzyme that generates sphingomyelin and diacylglycerol from phosphatidylcholine and ceramide. Although ceramide has a well-known role as a lipid mediator to regulate cell death and survival, the only known biological role of sphingomyelin regulated by sphingomyelin synthases was limited to being a source of bioactive lipids. Here, we describe the basic characters of sphingomyelin synthases and discuss additional roles for sphingomyelin and sphingomyelin synthase in biological functions including cell migration, apoptosis, autophagy, and cell survival/proliferation as well as in human disorders such as cancer and cardiovascular disorders. It is expected that a better understanding of the role of sphingomyelin regulated by sphingomyelin synthase will shed light on new mechanisms in cell biology, physiology and pathology. In the future, novel therapeutic procedures for currently incurable diseases could be developed through modifying the function of not only sphingolipids, such as sphingomyelin and ceramide, but also of their regulatory enzymes. This article is part of a Special Issue entitled New Frontiers in Sphingolipid Biology. •Sphingomyelin (SM) is a key component of membrane microdomain.•SM synthases (SMSs) generate SM from ceramide and phosphatidylcholine.•SM and SMSs are widely distributed in organisms.•This review summarizes the functions of SM and SMSs on a diverse of cell functions.
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