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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Aluminium inhibits muscarinic agonist-induced inositol 1,4,5-trisphosphate production and calcium mobilization in permeabilized SH-SY5Y human neuroblastoma cells.

The effects of aluminium (as Al3+) on carbachol-induced inositol 1,4,5-trisphosphate (InsP3) production and Ca2+ mobilisation were assessed in electropermeabilised human SH-SY5Y neuroblastoma cells. Al3+ had no effect on InsP3-induced Ca2+ release but appreciably reduced carbachol-induced Ca2+ release (IC50 of approximately 90 microM). Al3+ also inhibited InsP3 production (IC50 of approximately 15 microM). Dimethyl hydroxypyridin-4-one, a potent Al3+ chelator (Ks = 31), at 100 microM was able to abort and reverse the effects of Al3+ on both Ca2+ release and InsP3 production. These data suggest that, in permeabilised cells, the effect of Al3+ on the phosphoinositide-mediated signalling pathway is at the level of phosphatidylinositol 4,5-bisphosphate hydrolysis. This may reflect interference with receptor-G protein-phospholipase C coupling or an interaction with phosphatidylinositol 4,5-bisphosphate.[1]

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