960 resultados para Protogenes, active 300 B.C.


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Hay un ejemplar encuadernado con: Discret rahonament, quiexa formal que fan contra el Micalet de la Seu, la Torre de Espioca, y la Torre de Paterna, sobre la gran visita que éste tingué en lo dia cinc de Deembre [sic] ... per veure y admirar tan magnífica obra y deliciosa vista ... Carlos Quart (que Deu guart) y el señor Don Fernando de Borbó ... : (XVIII/1105).

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Contiene: Glosas de un amante, que se despide de su dama, hechas por el A, B, C ; Respuesta de la Dama en las otras letras restantes del abecedario

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The transcription factor nuclear factor κB (NFκB) is a key factor in the immune response triggered by a wide variety of molecules such as inflammatory cytokines, or some bacterial and viral products. This transcription factor represents a new target for the development of anti-inflammatory molecules, but this type of research is currently hampered by the lack of a convenient and rapid screening assay for NFκB activation. Indeed, NFκB DNA-binding capacity is traditionally estimated by radioactive gel shift assay. Here we propose a new DNA-binding assay based on the use of multi-well plates coated with a cold oligonucleotide containing the consensus binding site for NFκB. The presence of the DNA-bound transcription factor is then detected by anti-NFκB antibodies and revealed by colorimetry. This assay is easy to use, non-radioactive, highly reproducible, specific for NFκB, more sensitive than regular radioactive gel shift and very convenient for high throughput screening.

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Human c-sis/PDGF-B proto-oncogene has been shown to be overexpressed in a large percentage of human tumor cells establishing a growth-promoting, autocrine growth circuit. Triplex forming oligonucleotides (TFOs) can recognize and bind sequences in duplex DNA, and have received considerable attention because of their potential for targeting specific genomic sites. The c-sis/PDGF-B promoter contains a unique homopurine/homopyrimidine sequence (SIS proximal element, SPE), which is crucial for binding nuclear factors that provoke transcription. In order to develop specific transcriptional inhibitors of the human c-sis/PDGF-B proto-oncogene, 20 potential TFOs targeting part or all of the SPE were screened by gel mobility analysis. DNase I footprinting shows that the TFOs we designed can form a sequence-specific triplex with the target. Protein binding assays demonstrate that triplex formation inhibits nuclear factors binding the c-sis/PDGF-B promoter. Both transient and stable transfection experiments demonstrate that the transcriptional activity of the promoter is considerably inhibited by the TFOs. We propose that TFOs represent a therapeutic potential to specifically diminish the expression of c-sis/PDGF-B proto-oncogene in various pathologic settings where constitutive expression of this gene has been observed.

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National Highway Traffic Safety Administration, Washington, D.C.

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Includes index.

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Exhibition and sale at the American Art Galleries, New York.

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Frontispiece accompanied by leaf with descriptive letterpress.

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Vol. 2 cite as: P.Col. IV

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Includes bibliographical references.

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Vita.

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Includes index.