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Influence of vanadate on glycolysis, intracellular sodium, and pH in perfused r...
Geraldes, Carlos F. G. C.; Castro, M. Margarida C. A.; Sherry, A. Dean; Ramasamy, RavichandranVanadium compounds have been shown to cause a variety of biological and metabolic effects including inhibition of certain enzymes, alteration of contractile function, and as an insulin like regulator of glucose metabolism. However, the influence of vanadium on metabolic and ionic changes in hearts remains to be understood. In this study we have examined the influence of vanadate on glucose metabolism and sodium...
Multinuclear NMR study of the interaction of the shift reagent lanthanide(III) ...
Ramasamy, Ravichandran; Freitas, Duarte Mota de; Geraldes, Carlos F. G. C.; Peters, Joop A.The paramagnetic ion-induced relaxation rate enhancements of 6Li in adducts of Li+ and Ln(PPP)J- complexes (Ln = Dy, Tm) in aqueous solution show that up to seven monovalent counterions can coordinate in the second coordination sphere of the Ln(II1) ion to the outer oxygens of the triphosphate ligands. However, the pseudocontact ’Li NMR shift data suggest that in the second coordination sphere some preference o...
Effects of negatively charged shift reagents on red blood cell morphology, lith...
Ramasamy, Ravichandran; Freitas, Duarte Mota de; Jones, Warren; Wezeman, Frederick; Labotka, Richard; Geraldes, Carlos F. G. C.Lanthanide shift reagents have been used extensively in multinuclear magnetic resonance (NMR) applications in order to obtain information regarding ion distribution and transport in cellular systems. The aqueous reagents used in this study were Dy(PPP)J-, Tm( PPP)J-, Dy(TTHA)’-, Dy(PcPcP);-, and Dy(DOTP)’-, where Dy3+ and Tm3+ represent dysprosium and thulium ions and PPPs-, TTHA6-, PcPcPs-, and DOTP*- denote t...
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