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- W2093171072 abstract "31P-NMR spectroscopic studies were performed in vivo on brains of rats fed 30-35% normal dietary Mg intake for 6 weeks. Within 2 weeks of the moderately restricted Mg diet serum Mg fell 50%, and brain intracellular free [Mg2+]i fell 15%; within 3 weeks of restricted diet, brain [Mg2+]i fell 40% and remained at this level for the additional 3 weeks. Intracellular pH (pH[i]) progressively rose in a reciprocal manner for 4 weeks. At no interval of time did brain phosphocreatine (PCr), [ATP], or inorganic phosphate change despite the fall in brain [Mg2+]i, brain pH(i) and serum Mg. The Mg-deficiency-induced cytosolic loss of protons (resulting in an alkaline cytosol) could be a compensatory mechanism to stabilize [PCr], [ATP] and [ADP] levels via creatine kinase, thus maintaining cytosolic phosphorylation potential. The rise in pH(i) associated with Mg-deficiency would also account for increased cerebral vascular muscle contractility under these conditions. Lastly, these studies indicate that brain [Mg2+]i may change without a concomitant change in cell [ATP], and that brain [Mg2+]i may be a useful marker for total body Mg2+ status." @default.
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- W2093171072 date "1997-08-01" @default.
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- W2093171072 title "Short-term reduction in dietary intake of magnesium causes deficits in brain intracellular free Mg2+ and [H+]i but not high-energy phosphates as observed by in vivo 31P-NMR" @default.
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- W2093171072 doi "https://doi.org/10.1016/s0167-4889(97)00077-3" @default.
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