THE EFFECT OF CERTAIN METALLIC CATIONS ON THE IODIDE UPTAKE IN THE THYROID GLAND OF MICE

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Abstract
Ferric, cupric, mercuric, zinc, cadmium and nickel ions at the dose level of 0.1 millimole per kg body weight were found to decrease the uptake of iodine in the thyroid gland. Manganous ions exhibited a similar effect when the dose was doubled. A parallel decrease in the BF4− uptake could be demonstrated; this suggests an interference at the stage of iodide accumulation. Cobaltous, cobaltic, magnesium, beryllium and zirconium ions were shown to have no effect on iodine uptake at the same dose level. The mechanism of the effect is discussed.

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