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  • Title: Redistribution of subcellular calcium in rat liver on administration of vanadate.
    Author: Gullapalli S, Shivaswamy V, Ramasarma T, Kurup CK.
    Journal: Mol Cell Biochem; 1989 Oct 31; 90(2):155-64. PubMed ID: 2573825.
    Abstract:
    Mitochondria isolated from the livers of rats administered with sodium meta-, ortho-, or polyvanadate, but not vanadyl sulphate, exhibited enhanced Ca2+ -stimulated respiration and uptake of calcium. These effects were shown also by mitochondria isolated from livers perfused with polyvanadate. The concentration of acid-soluble calcium decreased significantly in the mitochondrial fraction on vanadate treatment, while that in the cytosol showed a corresponding increase. Phenoxybenzamine, an antagonist to alpha-adrenergic receptors, effectively inhibited vanadate-induced Ca2+ mobilization, but surgical sympathectomy was without effect. This is the first demonstration of vanadate mimicking alpha-adrenergic agonists in vivo.
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