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    Thyroid state-dependent effect of retinoic acid on thyroid hormone and retinoic acid receptors

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    Thyroid state-dependent effect of retinoic acid on thyroid hormone and retinoic acid receptors

    A new case of Marine-Lenhart syndrome with a papillary thyroid carcinoma

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    We report the case of a patient with the coexistence of Graves’ disease and autonomously functioning thyroid nodules. Because of the suspicious ultrasound pattern, he was submitted to fine-needle aspiration of the hot nodule and cytology revealed a papillary thyroid cancer. After total thyroidectomy a papillary thyroid cancer was found

    The molecular basis of thyroid hormone action

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    During the 1950s and 60s, thyroid hormone was believed to control metabolic action by uncoupling oxidative phosphorylation (1, 2), despite obser- vations that oxidative phosphorylation in muscle of thyrotoxic humans and animals was normally cou- pled to generation of high-energy phosphate bonds (3). In 1967 Tata andWilliams-Ashman (4) showed that thyroid hormone caused prompt changes in mRNA and protein synthesis, thereby shifting inte- rest to a nuclear site of act ion for the hormone . Following recogn ition of nuclear receptors for estro- gen and glucocorticoid (5, 6), Schad low et al. and Oppenheimer et al. reported in 1972 the presence of thyroid hormone binding substances , putative re- ceptors, in pituitary, kidney, and liver (7,8) . Since that time, the concept that thyroid hormone carries out its action through nuclear receptors has dominated re- search in this field, although there is evidence for entirely separate actions of thyroid hormone at the cell membrane (9) and on mitochondria (10)
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