Thyroid Hormone Receptors Trs
Mostrando 1-12 de 49 artigos, teses e dissertações.
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1. Mecanismos moleculares envolvidos na dominância negativa na síndrome de resistência ao hormônio tireoideano : I. genes regulados negativamente pelo receptor de hormônio tireoideano; II. genes regulados pelos receptores ativos por proliferadores de peroxissoma
A Síndrome de Resistência ao Hormônio Tireoideano (SRHT) é uma patologia caracterizada pela resposta reduzida dos tecidos-alvo ao hormônio tireoideano (HT). Ocorre comumente devido a mutações em um alelo do gene do receptor do hormônio tireoideano β (TRβ) que codifica para um TR mutante, o qual inibe a função do TRβ wt, fenômeno con
Publicado em: 2010
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2. Transporte de hormônios tireoideanos em hemácias de pacientes com hipertireoidismo ou hipotireoidismo primário
Thyroid hormones (THs) have important effects on cellular growth, differentiation and metabolism. They bind to thyroid hormone receptors (TRs), which belong to the nuclear hormone receptor superfamily. Because TRs are located intracellularly, TH action requires its transport from the extracellular compartment into target cells. It has become increasingly cle
Publicado em: 2009
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3. Receptores de hormônios da tireóide: estudos computacionais, ressonância plasmônica de superfície e ensaios celulares / Thyroid hormone receptor: computational studies, surface plasmon resonance and cell based assays
The thyroid hormone receptors (TRs) are transcriptional factors involved in cell differentiation, development, metabolism and physiological function of most tissues. Many lines of evidence show that several pharmacological actions of TRs might be beneficial in medical therapy, specially those mediated by TR that target important medical conditions like obesi
Publicado em: 2008
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4. Oligomerização, estruturas à baixa resolução, ligação ao DNA e ao ligante dos receptores de hormônios tireoidianos / Thyroid hormone receptor oligomerization, low resolution structures, DNA and ligand binding
The thyroid receptors (TRs) are proteins, which are involved in diverse and important physiological functions in the organisms, since they are regulators of development, cell divison and differentiation, metabolism and homeostasis. They are responsible by the regulation of specific gene transcription, through pleiotropic effects of lipophilic hormones in the
Publicado em: 2008
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5. Efeito da reposição do hormônio do crescimento (GH) no desenvolvimento ósseo de ratas hipotireoideas tratadas com o agonista seletivo do receptor b de hormônio tireoideano GC-1. / Effect of growth hormone (GH) replacement on bone development of hypothyroid rats treated with the thyroid hormone receptor b-selective agonist GC-1.
Sabe-se que o hipotireoidismo (Hipo) resulta em supressão do eixo hormônio de crescimento (GH)/ insulin-like growth factor I (IGF-I) e em atraso no desenvolvimento esquelético. Em um estudo anterior, vimos que o tratamento de ratas jovens Hipo com GC-1, um análogo da triiodotironina (T3) seletivo pela isoforma b de receptor de hormôn
Publicado em: 2008
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6. Regulatory functions of a non-ligand-binding thyroid hormone receptor isoform.
Gene regulation by thyroid hormones is mediated through multiple nuclear receptors. Only some of these thyroid hormone receptor (TR) isoforms become transcriptional enhancers in the presence of the thyroid hormone T3. Here we analyze the regulatory function of the human TR alpha 2 isoform. This protein does not bind T3 and is not a transcriptional activator
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7. Ciona intestinalis nuclear receptor 1: A member of steroid/thyroid hormone receptor family
Nuclear hormone receptors comprise a large family of zinc finger transcription factors, some with hydrophobic ligands, such as thyroid hormone, vitamin D, steroids, etc., and others for which no ligand has been found. Thyroid hormone receptors (TRs) generally are considered to be confined to the vertebrata that possess a thyroid gland. Tunicates represent th
The National Academy of Sciences.
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8. Both thyroid hormone and 9-cis retinoic acid receptors are required to efficiently mediate the effects of thyroid hormone on embryonic development and specific gene regulation in Xenopus laevis.
Tissue culture transfection and in vitro biochemical studies have suggested that heterodimers of thyroid hormone receptors (TRs) and 9-cis retinoic acid receptors (RXRs) are the likely in vivo complexes that mediate the biological effects of thyroid hormone, 3,5,3'-triiodothyronine (T3). However, direct in vivo evidence for such a hypothesis has been lacking
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9. Regulation of thyroid hormone receptor-mediated transcription by a cytosol protein.
Thyroid hormone receptors (TRs) are members of the steroid hormone/retinoic acid receptor superfamily, which regulate homeostasis, development, and differentiation. Their transcriptional activity is modulated by the thyroid hormone 3,3',5-triiodo-L-thyronine (T3). The present study evaluated the effect of the availability of cytoplasmic T3 on the modulation
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10. Thyroid hormone alters the DNA binding properties of chicken thyroid hormone receptors alpha and beta.
The effects of thyroid hormone agonists on thyroid hormone receptor (TR)/DNA complex formation was investigated to elucidate the mechanism by which TRs transactivate genes in response to ligand. The data, obtained from gel shift experiments, indicate that thyroid hormones alter the conformation of TRs bound to DNA, irrespective of if the element is occupied
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11. Hearing loss and retarded cochlear development in mice lacking type 2 iodothyronine deiodinase
The later stages of cochlear differentiation and the developmental onset of hearing require thyroid hormone. Although thyroid hormone receptors (TRs) are a prerequisite for this process, it is likely that other factors modify TR activity during cochlear development. The mouse cochlea expresses type 2 deiodinase (D2), an enzyme that converts thyroxine, the ma
National Academy of Sciences.
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12. Modulation of the transcriptional activity of thyroid hormone receptors by the tumor suppressor p53.
Thyroid hormone nuclear receptors (TRs) are ligand-dependent transcriptional factors that regulate growth, differentiation, and development. The molecular mechanisms by which TRs mediate these effects are unclear. One prevailing hypothesis suggests that TRs may cooperate with other transcriptional factors to mediate their biological effects. In this study, w