Abstract
Nerve growth factor (NGF)-induced neurite-outgrowth of PC12 cells was enhanced by polyoxometalates such as Na9[SbW(9)O(33)].19.5H(2)O (SbW(9)) and (NH(3)Pr(i))6[Mo(7)O(24)].3H(2)O (Mo(7)). Western blotting analysis of polyoxometalate/NGF-treated PC12 cells showed a strong expression of growth-associated protein 43 (GAP-43), which is associated with the neurite outgrowth. Similar effects were observed for other polyoxometalates, K(11)H[(VO)3(SbW(9)O(33))2].27H(2)O ((VO)3(SbW(9))2), K6[P(2)W(18)O(62)].14H(2)O (P(2)W(18)), and K7[PTi(2)W(10)O(40)].6H2O (PTi(2)W(10)), in contrast with little effect for monomeric tungstate and molybdate. Of the polyoxometalates tested in this study, SbW(9) and Mo(7) were the most potent.
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