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Título: | Identification of a thyroid hormone response element in the promoter region of the rat lipocalin-type prostaglandin D synthase (β-trace) gene |
Autor: | García-Fernández, Luis F. CSIC; Bernal, Juan CSIC ORCID; Muñoz Terol, Alberto CSIC ORCID | Fecha de publicación: | 1998 | Editor: | Elsevier | Citación: | Molecular Brain Research 55(2): 321-330 (1998) | Resumen: | We have previously reported that mRNA levels for the rat lipocalin-type prostaglandin (PG) D synthase/β-trace (PGDS) gene, the enzyme responsible for the production of PGD2 in the central nervous system, are regulated by thyroid hormone in vivo. In this study, we describe the identification of a thyroid hormone (T3) response element (T3RE) in the 5'-flanking region of the rat PGDS gene. By radioimmunoprecipitation of genomic fragments using thyroid hormone receptor (TR) protein and specific anti-TR antibodies, gel-shift, foot-printing, mutational analysis, and transactivation assays we have identified a spaced four imperfect direct repeat (DR4) element, GGTTCACTTCAGGGTA (positions -586/-571), which functions as a T3RE when fused to a heterologous promoter. Our results suggest that thyroid hormone regulates the expression of the rat lipocalin-type PGDS gene through this element. Remarkably, the element identified also confers regulation by retinoic acid. Giving the important roles proposed for the PGDS enzyme and its product, PGD2, the major PG in the mammalian brain, the altered expression of the PGDS gene may contribute to the deleterious effects of hypothyroidism in the central nervous system. | URI: | http://hdl.handle.net/10261/79452 | DOI: | 10.1016/S0169-328X(98)00015-1 | Identificadores: | doi: 10.1016/S0169-328X(98)00015-1 issn: 0169-328X |
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