Magnesium Transport Defect with Hypercalcaemia

Symptomatic hypercalcaemia precipitated by magnesium therapy.

A patient with Crohn's disease receiving vitamin D and calcium had normal serum calcium levels when serum magnesium was low. Hypercalcaemia was precipitated when supplemental magnesium was given. The reason why serum calcium was initially normal is probably related to the effect of magnesium deficiency in reducing serum calcium level.

Hypercalcaemia associated with tuberculosis.

Magnesium transport in Escherichia coli.

Escherichia coli has a specitic active transport system for magnesium which can be studied with the radioisotope 28Mg. The accumulation of 2*Mg is temperature-dependent and inhibited by cyanide, dinitrophenol, and m-chlorophenyl carbonylcyanide hydrazone. The initial rate of uptake of SMg shows typical saturation kinetics with a & = 18 /LM magnesium and a V,,,,, = 0.56 pmole per min per 1012 ce...

Magnesium transport in freshwater teleosts

The magnesium handling of freshwater teleost fish is discussed, with an emphasis on the role of branchial, intestinal and renal transport. In response to the eminent threat of constant diffusive losses of minerals such as magnesium, freshwater fish have developed efficient mechanisms for magnesium homeostasis. Magnesium losses are overcome by the uptake of magnesium from the food, making the in...

Hypercalcaemia.

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