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	Provedor de dados BJMBR (1) Genet. Mol. Biol. (1) International Journal of Morphology (1) Autor Abdelhay,Eliana (1) Bluhm,A.P.C. (1) Castrucci,A.M.L. (1) Cofre,Jaime (1) Díaz Murillo,H (1) Obeid,N.N. (1) Pedemonte Campos,C (1) Visconti,M.A. (1) Mais... Palavra-chave Xenopus laevis (3) Bmal1 (1) Carboxyl terminal tail (1) Clock (1) Connexins (1) Dermal melanophores (1) Dorso-ventral axis (1) Early development in amphibians (1) Melanina (1) Melanopsin (1) Melatonin (1) Per1 (1) Per2 (1) Radiación ultravioleta (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Journal article (1) Ano 2013 (1) 2012 (1) 2007 (1) País Brazil (2) Chile (1) Idioma Inglês (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Connexins in the early development of the African clawed frog Xenopus laevis (Amphibia): The role of the connexin43 carboxyl terminal tail in the establishment of the dorso-ventral axis Genet. Mol. Biol. Cofre,Jaime; Abdelhay,Eliana. Connexins are a family of related proteins identified in vertebrate forming gap junctions, which mediate cell-to-cell communication in early embryos, with an important role in establishing embryonic asymmetry and ‘communication compartments’. By in situ hybridization, immunocytochemistry, reverse transcriptase PCR (RT-PCR) and western blotting we show that a Cx43-like molecule is present in oocytes and embryos of the African clawed frog Xenopus laevis, with specific localization in the animal-vegetal axis. This specific distribution is suggestive for an important role for this protein in the establishment of the dorso-ventral axis. Antisense RNA and antibodies directed against rat carboxyl terminal tail of the Cx43 (CT-Cx43) and injected in 1-cell stage... Tipo: Info:eu-repo/semantics/article Palavras-chave: Connexins; Carboxyl terminal tail; Dorso-ventral axis; Early development in amphibians; Xenopus laevis. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300030 Aparición de Melanina como Pigmento Protector en el Encéfalo de Xenopus laevis para Protegerlo de los Efectos de la Radiación Ultravioleta International Journal of Morphology Díaz Murillo,H; Pedemonte Campos,C. Con el fin de proteger al organismo de condiciones estresantes, tales como cambios de osmolaridad y de temperatura, además de actuar como pantalla protectora en contra de los rayos ultravioleta (UV). Se ha observado que ciertos anfibios han desarrollado pigmentación en su encéfalo como una posible protección ante el aumento de la radiación UV, causada por el daño en la capa de ozono, la cual estaría alterando al ecosistema. En este trabajo se describe la presencia de pigmentación en el encèfalo de X. laevis durante el desarrollo larvario y su posible función protectora frente a la radiación UV. Para ello, se recolectaron individuos de diferentes estados larvarios, los que fueron obtenidos de distintas localidades de la región de Valparaíso (V región,... Tipo: Journal article Palavras-chave: Melanina; Radiación ultravioleta; Xenopus laevis. Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300055 The expression of melanopsin and clock genes in Xenopus laevis melanophores and their modulation by melatonin BJMBR Bluhm,A.P.C.; Obeid,N.N.; Castrucci,A.M.L.; Visconti,M.A.. Vertebrates have a central clock and also several peripheral clocks. Light responses might result from the integration of light signals by these clocks. The dermal melanophores of Xenopus laevis have a photoreceptor molecule denominated melanopsin (OPN4x). The mechanisms of the circadian clock involve positive and negative feedback. We hypothesize that these dermal melanophores also present peripheral clock characteristics. Using quantitative PCR, we analyzed the pattern of temporal expression of Opn4x and the clock genes Per1, Per2, Bmal1, and Clock in these cells, subjected to a 14-h light:10-h dark (14L:10D) regime or constant darkness (DD). Also, in view of the physiological role of melatonin in the dermal melanophores of X. laevis, we determined... Tipo: Info:eu-repo/semantics/article Palavras-chave: Xenopus laevis; Dermal melanophores; Melatonin; Melanopsin; Per1; Per2; Bmal1; Clock. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000800007 Registros recuperados: 3 Primeira ... 1 ... Última

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