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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The effect of experimental hyperthyroidism and hypothyroidism on 5'-monodeiodination of 3,3',5'-triiodothyronine and 3',5'-diiodothyronine by rat liver and kidney.

To study the effect of alterations in thyroid status on 5'-monodeiodinase activity, conversions of rT3 to 3,3'-diiodothyronine and 3',5'-diiodothyronine (3',5'-T2) to 3'-monoiodothyronine were examined in vitro. Rats were injected either with T4 (10 micrograms/100 g BW, ip, daily for 12 days) to make them thyrotoxic or thyroidectomized to render them hypothyroid, and liver and kidney homogenates were prepared. Liver homogenates from hyperthyroid animals demonstrated a 2-fold increase in 5'-monodeiodination of both rT3 and 3',5'-T2; both reactions were also significantly increased in the kidneys of hyperthyroid rats. Hypothyroidism produced a significant decrease in 5'-deiodination of both rT3 and 3',5'-T2 in liver and kidney homogenates. These data indicate that the in vitro 5'-deiodination of both rT3 and 3',5'-T2 is increased in hyperthyroidism and decreased in hypothyroidism and suggest that these two iodothyronines are metabolized in a similar fashion in rat liver and kidney homogenates in states of altered thyroid function.[1]

References

  1. The effect of experimental hyperthyroidism and hypothyroidism on 5'-monodeiodination of 3,3',5'-triiodothyronine and 3',5'-diiodothyronine by rat liver and kidney. Smallridge, R.C., Wartofsky, L., Burman, K.D. Endocrinology (1982) [Pubmed]
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