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| Registros recuperados: 38 | |
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| Sauzet, S; Besseau, L; Perez, P; Coves, Denis; Chatain, Beatrice; Peyric, E; Boeuf, G; Munoz Cueto, J; Falcon, J. |
| Melatonin contributes to synchronizing behaviors and physiological functions to daily and seasonal rhythm in fish. However, no coherent vision emerges because the effects vary with the species, sex, moment of the year or sexual cycle. And, scarce information is available concerning the melatonin age, receptors, which is crucial to our understanding of the role melatonin plays. We report here the full length cloning of three different melatonin receptor subtypes in the sea bass Dicentrarchus labrax, belonging, respectively, to the MT1, MT2 and Mellc subtypes. MT1, the most abundantly expressed, was detected in the central nervous system, retina, and gills. MT2 was detected in the pituitary gland, blood cells and, to a lesser extend, in the optic tectum,... |
| Tipo: Text |
Palavras-chave: Retina; Melatonin receptors; Sea bass. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4513.pdf |
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| Pellón,Mario; Rojas,Mariana; Yaikin,Pabla; del Sol,Mariano. |
| La retina de peces teleósteos como pez cebra, se ha transformado en un importante modelo para el estudio de la plasticidad neuronal y la neurogénesis. Se ha demostrado además que la retina experimenta cambios ontogenéticos para adaptarse a distintos medios ambientes durante su vida. Este estudio tiene como objetivo describir el desarrollo ontogenético de la retina del alevín de salmón desde la eclosión hasta la fase de juvenil. Se trabajó con 30 salmones divididos en tres grupos de 10. Grupo I: recién eclosionados, con saco vitelino y 18 mm de longitud. Grupo II: sin saco vitelino y 30 mm de longitud. Grupo III: 100 mm de longitud. Cinco alevinesde cada grupo fueron procesados según el protocolo de Hanken & Wassersug para medir los diámetros... |
| Tipo: Journal article |
Palavras-chave: Retina; Ojo; Alevín; Peces teleósteos; Salmón; Desarrollo. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200058 |
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| Özevren,Hüseyin; Deveci,Engin. |
| Head trauma affects the optic nerve visual function and visual acuity. As a result of head trauma occurring in the retina of the various biochemical, histological and immunohistochemical effects were investigated. The protective effect of Ganoderma lucidum was evaluated on the damage to the retina of the rats. Sprague-Dawley rats were subjected to traumatic brain injury with a weight-drop device using 300 g-1 m weight-height impact. Thirty rats were divided into three groups as group 1 control, 2 group trauma, 3 group trauma+Gonoderma lucidum (20 mL/kg per day via gastric gavage) Ganoderma lucidum was administered for 7 days after trauma.All rats were decapitated 5 days after the induction of trauma, and the protective effects of Ganoderma lucidum in... |
| Tipo: Journal article |
Palavras-chave: Head trauma; Retina; Ganoderma lucidum; Rat. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300040 |
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| Pellón,Mario; Rojas,Mariana; Saint-Pierre,Gustavo; Hartley,Ricardo; del Sol,Mariano. |
| It has been demonstrated that hypoxia retards the growth of fish, reduces the survival of their larvae, deforms their vertebral column, but despite this teleost fish have the ability to completely regenerate many of their tissues, particularly the retina. As we do not have enough information about the effects of hypoxia on the eyeball, orbit and retina of Atlantic salmon (Salmo salar), we propose the following objectives: 1) Compare the morphological changes of the eyeball of fish subject to hypoxia and normoxia. 2) Determine changes in the orbit structure. 3) Describe the retina of salmon alevins. 4). Recognize hypoxic cells using the anti-Hif1a antibody in the retina of alevins as a sensor. 5) Determine the Shh morphogenic expression in alevins exposed... |
| Tipo: Journal article |
Palavras-chave: Eyeball; Orbit; Retina; Salmo salar; Hypoxia; HIF1a; Shh. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100046 |
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| She,Qiusheng; An,Zhenqiang; Xia,Chengqiang; Kong,Yunfei; Chen,Enxiang. |
| The objective of this study was to explore the relationship between the retinal structure and its life adaptation to the environment of Ctenopharyngodon idella, Cynops orientalis, Bufo bufo gargarizans, Gekko japonicus and Columba livia . Measuring retinal thickness of each layer, the nuclei layer, and the diameter of each nuclear layer of the five animals, the statistical data analysis shows that: the nuclei layers of five animals are all 4, and their structures can be divided to 10 layers when observing with optical microscope. The retinal thickness of Ctenopharyngodon idella was 190.49 mm, Cynops orientalis was 173.07 µm, and the Bufo bufo gargarizans was 195.06 µm, Gekko japonicus was 224.32 µm and Columba livia was 174.10 µm. The number of retinal... |
| Tipo: Journal article |
Palavras-chave: Ctenopharyngodon idella; Cynops orientalis; Bufo bufo gargarizans; Gekko japonicas; Columba livia; Retina; Comparative histology. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300028 |
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| Segovia,Y. |
| La apoptosis o muerte celular programada es un proceso que ocurre durante el desarrollo del sistema nervioso. El objetivo de este estudio fue observar los patrones de apoptosis que se producen durante el desarrollo embrionario de la retina, desde el estadio S16 al momento del nacimiento, mediante miscoscopía óptica y electrónica. Se utilizaron retinas de embriones de tortuga. Nuestros datos muestran que los primeros signos de apoptosis comienzan en el estadio S16, en la capa nuclear interna y alcanzan su máxima densidad tanto en la capa nuclear interna como en la capa de células ganglionares en S20, para extinguirse, prácticamente, en el momento del nacimiento. Por otra parte, la apoptosis sigue un gradiente centro-periferia. |
| Tipo: Journal article |
Palavras-chave: Trachemys scripta elegans; Apoptosis; Retina; Tortuga. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100020 |
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| Hüseyin,Özevren; Engin,Deveci. |
| Traumatic head injury is a leading cause of mortality and morbidity. As a result of head trauma occurring in the retina of the various biochemical, histological and immunohistochemical effects were investigated. SpragueDawley rats were subjected to traumatic brain injury with a weight-drop device using 300 g-1 m weightheight impact. Twenty one rats were divided into three groups, as group 1 (vehicle-treated control), group 2 (vehicle-treated trauma) group 3 trauma + Potentilla fulgens ( P. Fulgens) 400 mg/kg/day, i.p.). Distilled water was used as vehicle. All rats were decapitated 5 days after the induction of trauma, and the protective effects of P. Fulgens were evaluated by histological, immunohistochemical and biochemical analyses. Although further... |
| Tipo: Journal article |
Palavras-chave: Traumatic injury; Retina; Potentilla fulgens; Rat. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300007 |
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| Mengual,R; Segovia,Y; García,M. |
| Existe una estrecha relación entre las características morfológicas de los sistemas sensoriales, su funcionamiento y el hábitat al que están adaptados los organismos. En este sentido, de todos los mamíferos marinos estudiados, los cetáceos son los que más profundamente han modificado su estructura y fisiología ocular por su estrecha adaptación a una vida exclusivamente acuática. Para aportar más datos a la literatura, el objetivo de este trabajo es describir morfológicamente la retina de la ballena piloto a través de técnicas de microscopia óptica, con el fin de relacionarla con su adaptación al medio acuático. Nuestros datos muestran que la retina de Globicephala melas se organiza de acuerdo al mismo plan básico de los vertebrados. Tiene un grosor medio... |
| Tipo: Journal article |
Palavras-chave: Globicephala melas; Visión de cetáceos; Retina. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400044 |
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| Donatti,Lucélia; Fanta,Edith. |
| The Antarctic fish Trematomus newnesi (Boulenger, 1902) occurs from benthic to pelagic habitats, in seasonally and daily varied photic conditions that induce retinomotor movements. Fish were experimentally kept under constant darkness or light, and 12Light/12Dark for seven days. The retinomotor movement of the pigment epithelium was established through the pigment index, while that of the cones was calculated as the length of the myoid. The retinomotor movement of the pigment epithelium in T.newnesi,revealed that the adaptation to constant light occurred in the one hour of exposure, remaining constant for the next seven days. However, the adaptation to constant darkness, was slower. The difference between the mean values of the pigment indices in the time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photic variation; Photoreceptors; Retina. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200025 |
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| Donatti,Lucélia; Fanta,Edith. |
| The retina of Metynnis roosevelti Eigenmann, 1915, a very active freshwater fish, was investigated by light and electron microscopy and was found to have a complex neuronal structure that allows rapid responses of visual stimuli. Retina photoreceptors are double cones, single long cones, single short cones and rods. Cone inner segments are arranged as mosaics. The outer nuclear layer contains small nuclei of twin cones, long and wide nuclei of long single cones, spherical large nuclei of short cones, and small dense nuclei of rods. Horizontal, amacrine, bipolar and ganglion neurones are responsible for connections and integration between photoreceptor cells and afferent neurones. The pigmented epithelium comprises a single layer of cylindrical cells each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Retina; Morphology; Red light. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100011 |
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| MÁRQUEZ GARCÍA,Asarí; SALAZAR,Víctor; LIMA,Lucimey. |
| RESUMEN La deficiencia de zinc en humanos produce disminución de antioxidantes, asociados a taurina, en la retina y se relaciona con adaptación anormal a la oscuridad, cataratas, ceguera y degeneración macular. Existe escasa evidencia acerca del efecto del zinc sobre el sistema de taurina en retina de mamíferos, por lo cual estudiamos el efecto del zinc sobre el transportador de taurina (TAUT) y los transportadores de zinc (ZnT-1 y 3) usando el quelante de zinc extracelular, ácido dietileno-triamino-penta-acético (DTPA), mediante inmunocitoquímica e inmunohistoquímica fluorescentes en células ganglionares (CG) y en las capas de la retina de ratas. Tres días después de la administración de DTPA (10μM) se utilizaron anticuerpos primarios y secundarios... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Retina; Taurina; Transportador de taurina; Transportadores de zinc; Zinc. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2017000200002 |
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| TOVAR BOHÓRQUEZ,MARIO OSWALDO; CONTRERAS BRAVO,LUISA FERNANDA; CALDAS,MARIA LEONOR; RODRÍGUEZ CAICEDO,DANIEL; HURTADO GIRALDO,HERNÁN. |
| La visión es de importancia variable dependiendo de la relación de los peces con su hábitat, siendo clave en algunas especies y secundaria en otras. El objetivo de este estudio fue realizar una comparación entre el ojo de capitán de la sabana y trucha arco iris. La primera, nativa del altiplano cundiboyacence. La segunda es una especie introducida al país y con alta importancia en la piscicultura. Se obtuvieron cortes de ojo a 5 µm de espesor en ambas especies. Las dos presentan la estructura ocular típica de teleósteos conformada por una retina con ocho capas y dos membranas, células fotorreceptoras (conos y bastones), así como los otros tipos de células neuronales características (bipolares, horizontales, amacrinas y ganglionares), y un cristalino casi... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ojo; Retina; Morfometría; Trucha arco iris; Capitán de la sabana. |
| Ano: 2008 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2008000200005 |
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| Crivelaro,R.M.; Thiesen,R.; Aldrovani,M.; Lima,T.B.; Ortêncio,K.P.; Padua,I.R.M.; Duarte,J.M.B.; Laus,J.L.. |
| ABSTRACT The aim of this study was to establish normal baseline ERG values of 23 anesthetized deer belonging to 8 neotropical species (Mazama americana, Mazama nemorivaga, Mazama gouazoubira, Mazama nana, Mazama bororo, Ozotocerus bezoarticus, Odocoileus virginianus and Blastocerus dichotomus). Only right eyes were studied. Chemical restraint was performed using xylazine associated with ketamine, IM, for M. americana, M. gouazoubira, M. nemorivaga, M. nana, M. bororo, O. bezoarticus and O. virginianus. A combination of tiletamine/zolazepam diluted in xylazine 2% was used for B. dichotomus individuals. After 20min of dark adaptation, electroretinograms were obtained using a handheld electroretinography (ERG) machine using the QuickRetCheck Protocol at three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cervidae; Habitat; Retina; Wild animal; ERG. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501505 |
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| Morais,T.L.; Neves,C.A.; Borges,N.C; Lima,A.M.V; Silva,L.F.L; Castro,L.T.S; Espindola,S.O; Cunha,P.H.J. |
| RESUMO No presente estudo, foram avaliados parâmetros oftalmológicos de 38 bovinos das raças Nelore (n= 19; grupo GN) e Gir (n= 19; grupo GG), machos, com idade média de 15 meses. Os exames oftalmológicos realizados foram teste lacrimal de Schirmer 1 (TLS-1), tonometria de aplanação, retinografia e biometria por ultrassonografia em modo B. Os resultados do TLS-1, tonometria de aplanação e biometria ocular foram avaliados por meio da análise de variância (ANOVA), e as médias comparadas pelo teste de Tukey. Para o exame de retinografia, foi realizada a análise descritiva das estruturas anatômicas. O TLS-1 e a tonometria não diferiram (P≥0,05) nas comparações entre os olhos e entre os grupos raciais. A retinografia permitiu a visualização do disco óptico, dos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oftalmologia; Retina; Schirmer; Tonometria; Ultrassonografia. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000100177 |
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| ALBORNOZ,AMELINA; YÁÑEZ,JOSÉ M; FOERSTER,CLAUDIA; AGUIRRE,CELESTE; PEREIRO,LUISA; BURZIO,VERÓNICA; MORAGA,MAURICIO; REYES,ARIEL E; ANTONELLI,MARCELO. |
| Protein kinase CK1 is a ser/thr protein kinase family which has been identified in the cytosol cell fraction, associated with membranes as well as in the nucleus. Several isoforms of this gene family have been described in various organisms: CK1á, CK1ß, CK1δ, CK1å and CK1γ. Over the last decade, several members of this family have been involved in development processes related to wnt and sonic hedgehog signalling pathways. However, there is no detailed temporal information on the CK1 family in embryonic stages, even though orthologous genes have been described in several different vertebrate species. In this study, we describe for the first time the cloning and detailed expression pattern of five CK1 zebrafish genes. Sequence analysis... |
| Tipo: Journal article |
Palavras-chave: CK1; Casein Kinase 1; Expression pattern; Development; Zebrafish; Otic vesicles; Retina; Lens; Pectoral fin bud; Tegmentum; Myelencephalon; Telencephalon; Diencephalon; Mesencephalon; Rhombomeres. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200015 |
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| Tanan,C.L.; Ventura,D.F.; de Souza,J.M.; Grotzner,S.R.; Mela,M.; Gouveia Jr.,A.; Oliveira-Ribeiro,C.A.. |
| Methyl mercury (MeHg) is highly neurotoxic, affecting visual function in addition to other central nervous system functions. The effect of mercury intoxication on the amplitude of horizontal cell responses to light was studied in the retina of the fish Hoplias malabaricus. Intracellular responses were recorded from horizontal cells of fish previously intoxicated with MeHg by intraperitoneal injection (IP group) or by trophic exposure (T group). Only one retina per fish was used. The doses of MeHg chloride administered to the IP group were 0.01, 0.05, 0.1, 1.0, 2.0, and 6.0 mg/kg. The amplitudes of the horizontal cell responses were lower than control in individuals exposed to 0.01 (N = 4 retinas), 0.05 (N = 2 retinas) and 0.1 mg/kg (N = 1 retina), whereas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Methyl mercury; Horizontal cells; Electrophysiology; Hoplias malabaricus; Retina. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000700017 |
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| Registros recuperados: 38 | |
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