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lüll Gangliosides as apoptotic signals in ER stress response d'Azzo A; Tessitore A; Sano RCell Death Differ 2006[Mar]; 13 (3): 404-14Renewed attention has been given lately to gangliosides and to their function as intracellular messengers of the adaptive responses to stress. Gangliosides are vital components of cell membranes; therefore, deleterious consequences can result from changes in their chemical composition and concentration, that is, membrane dynamics and structure can be altered as can the behavior of other membrane proteins. The importance of gangliosides in human health is evident in neurodegenerative diseases associated with defects in their degradation. As key modulators of intracellular calcium flux, gangliosides are involved in cellular processes downstream of calcium signaling. In this review, we focus on the effect of ganglioside accumulation on the endoplasmic reticulum calcium homeostasis and on the integrity of the mitochondrial membranes. We discuss how these events elicit an apoptotic program that ultimately leads to cell death. Owing to interorganelle crosstalk, these events are not necessarily self-contained, and gangliosides may serve as the common factor.|*Apoptosis[MESH]|Animals[MESH]|Disease Models, Animal[MESH]|Endoplasmic Reticulum/*physiology[MESH]|Gangliosides/*metabolism[MESH]|Humans[MESH]|Mitochondria/metabolism[MESH]|Signal Transduction[MESH]|Sphingolipidoses/*etiology[MESH] |