| Journal: | Biological research |
| Database: | PERIÓDICA |
| System number: | 000269167 |
| ISSN: | 0716-9760 |
| Authors: | Varela, Patricia1 Tapia, Gladys2 Fernández, Virginia Videla, Luis A |
| Institutions: | 1Universidad de Chile, Programa de Biología Molecular y Celular, Santiago de Chile. Chile 2Universidad de Chile, Programa de Farmacología Clínica y Molecular, Santiago de Chile. Chile |
| Year: | 2006 |
| Volumen: | 39 |
| Number: | 4 |
| Pages: | 611-617 |
| Country: | Chile |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Thyroid hormone (TH; 3,3',5-triiodothyronine, T3) is required for the normal function of most tissues, with major effects on 02 consumption and metabolic rate. These are due to transcriptional activation of respiratory genes through the interaction of T3-liganded TH receptors with TH response elements or the activation of intermediate factors, with the consequent higher production of reactive 02 species (ROS) and antioxidant depletion. T3-induced oxidative stress in the liver triggers the redox upregulation of the expression of cytokines (tumor necrosis factor-α [TNF-α], interleukin-10), enzymes (inducible nitric oxide synthase, manganese superoxide dismutase), and anti-apoptotic proteins (Bcl-2), via a cascade initiated by TNF-α produced by Kupffer cells, involving inhibitor of κB phosphorylation and nuclear factor-κB activation. Thus, TH calorigenesis triggers an expression pattern that may represent an adaptive mechanism to re-establish redox homeostasis and promote cell survival under conditions of ROS toxicity secondary to TH-induced oxidative stress. Mechanisms of expression of respiratory and redox-sensitive genes may be functionally integrated, which could be of importance to understand the complexities of TH action and the outcome of thyroid gland dysfunction |
| Disciplines: | Química, Medicina |
| Keyword: | Bioquímica, Metabolismo y nutrición, Genética, Hormonas tiroideas, Calorigénesis, Estrés oxidativo, Expresión génica |
| Keyword: | Chemistry, Medicine, Biochemistry, Metabolism and nutrition, Thyroid hormones, Calorigenesis, Oxidative stress, Gene expression, Genetics |
| Full text: | Texto completo (Ver HTML) |
