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Serum thyroxine, triiodothytonine and reverse triiodothyronine in early postnatal period in pig (preliminary communication).

Slebodziński Ab, Greg Nowak, H Zamysłowska

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Abstract

The rapid increase in serum thyroxine (T4), triiodothyronine (T3) and reverse triiodothyronine (rT3) in the pig shortly birth presumably due to enhanced secretory activity of the thyroid gland was observed. During the 2nd and 3rd week of live T3 and T4 remained essentially unchanged but rT3 continued to rise to a high plateau level. This resulted in an increase in rT3/T4 ratio to about two and rT3/T3 raio to about one. A shift to rT3 production seems to be a reflection of an increased capacity of 5-iodothyronine deiodinase with age.

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What this paper is about

The rapid increase in serum thyroxine (T4), triiodothyronine (T3) and reverse triiodothyronine (rT3) in the pig shortly birth presumably due to enhanced secretory activity of the thyroid gland was observed. During the 2nd and 3rd week of live T3 and T4 remained essentially unchanged but rT3 continued to rise to a high plateau level. This resulted in an increase in rT3/T4 ratio to about two and rT3/T3 raio to about one. A shift to rT3 production seems to be a reflection of an increased capacity of 5-iodothyronine deiodinase with age.

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Available abstract

The rapid increase in serum thyroxine (T4), triiodothyronine (T3) and reverse triiodothyronine (rT3) in the pig shortly birth presumably due to enhanced secretory activity of the thyroid gland was observed. During the 2nd and 3rd week of live T3 and T4 remained essentially unchanged but rT3 continued to rise to a high plateau level. This resulted in an increase in rT3/T4 ratio to about two and rT3/T3 raio to about one. A shift to rT3 production seems to be a reflection of an increased capacity of 5-iodothyronine deiodinase with age.

Key concepts: Reverse triiodothyronine, Triiodothyronine, Deiodinase, Internal medicine, Endocrinology, Free thyroxine, Thyroid, Period (music)

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Serum thyroxine, triiodothytonine and reverse triiodothyronine in early postnatal period in pig (preliminary communication). — Research Paper | ScholarLens