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  • Title: Use of recombinant human thyroid-stimulating hormone for thyrotropin stimulation test in euthyroid dogs.
    Author: Sauvé F, Paradis M.
    Journal: Can Vet J; 2000 Mar; 41(3):215-9. PubMed ID: 10738600.
    Abstract:
    The purpose of this study was to evaluate the effects of the recombinant human thyroid-stimulating hormone (rhTSH) on serum total thyroxine (TT4) concentration in euthyroid dogs. Six healthy beagle dogs were used in each of the 3 phases of this study. Phase I: thyroid-stimulating hormone response tests were performed by using a total dose of 25 micrograms, 50 micrograms, and 100 micrograms of rhTSH, administered intravenously. Phases II and III: thyroid-stimulating hormone response tests were performed by using 50 micrograms of rhTSH administered by intramuscular and subcutaneous routes, respectively. In each phase and following all the administered doses of rhTSH, an increase in the serum TT4 concentration was noted, although it was not always significant. For phase I, there was a significant increase in serum TT4 concentrations. Based on this study, 50 micrograms was judged to be the optimal intravenous dose of rhTSH. For phases II and III, there was no significant increase in serum TT4 after the administration of rhTSH. Results of this study suggest that rhTSH could be a good substitute for bovine TSH, when used by the intravenous route, for the TSH stimulation test in dogs. Further studies are required to confirm its clinical usefulness.
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