Remagen W, Guncaga J, Lauffenburger T. Comparison of the effects of vitamin D3, dihydrotachysterol, and parathormone on calcium kinetics in the rat.
RESEARCH IN EXPERIMENTAL MEDICINE. ZEITSCHRIFT FUR DIE GESAMTE EXPERIMENTELLE MEDIZIN EINSCHLIESSLICH EXPERIMENTELLER CHIRURGIE 1975;
165:285-90. [PMID:
169559 DOI:
10.1007/bf01971388]
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Abstract
Rats were treated with 100 I.U. (= 2.5 mcg) Vit. D3/day during 14 days and submitted to a radio-Calcium assay of Calcium kinetics. The results were compared with those obtained in weight-matched pair-fed controls, and with those obtained in former experiments applying dihydrotachysterol and parathormone. Vit. D3, which is transformed to a hormone, increased the fast exchange compartment, the exchange rate between the compartments, the endogenous fecal Calcium excretion rate, and the bone uptake and release rates. These findings indicate that the Vit. D-hormone is more similar in its action to the other hormone, parathormone, than to its close chemical relative dihydrotachysterol.
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