Aluminium interferes with signal transduction in neuroblastoma cells

¹Department of Microbiology and Public Health, Michigan State University, East Lansing 48824.

|October 1, 1992

Abstract:

The effects of aluminium on inositol phosphate formation were examined in murine neuroblastoma cells labelled with [3H]-myo-inositol. In aluminium-pretreated cells, the bradykinin-triggered inositol triphosphate, IP3, release and the change in intracellular [Ca2+] were appreciably less compared with the control group. Stimulating digitonin-permeabilized cells with non-hydrolyzable guanosine 5'-[gamma-thio]-triphosphate, GTP[S], inositol phosphate formation decreased in the presence of aluminium. A primary target of aluminium toxicity may reside on the guanine nucleotide-binding protein(Gp)/phospholipase C system, at a site different from that of the GTP[S] binding site.

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Abstract:

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