Multipolar Cells
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Cytoarchitecture of the superior olivary complex of three neotropical species of bats (Noctilio leporinus, Phyllostomus hastatus and Carollia perspicillata) with different foraging behavior
Resumo O entendimento da ecolocalização pelo estudo de diferentes núcleos auditivos de morcegos pode ser um elo importante na elucidação das inúmeras questões que surgem em relação ao seu comportamento de forrageamento. O complexo olivar superior (SOC) é o principal centro de processamento das pistas binaurais usadas na localização do som, já qu
Braz. J. Biol.. Publicado em: 09/05/2019
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2. Estudo da Expressão do Canal para Sódio Dependente de Voltagem Nav1.6 nas Células Octopus e Multipolares do PVCN no Núcleo Coclear do Sistema Auditivo
O presente trabalho teve como objetivo avaliar quais subunidades de canais para sódio voltagem dependentes estão presentes em subpopulações neuronais da região póstero-ventral do núcleo coclear (PVCN). Reações de imunofluorescência de simples ou dupla marcação em fatias parassagitais do núcleo coclear revelaram a expressão do canal Nav1.6 no se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/2011
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3. Genotoxicity and mutagenicity of water contaminated with tannery effluents, as evaluated by the micronucleus test and comet assay using the fish Oreochromis niloticus and chromosome aberrations in onion root-tips
Cytotoxicity of metals is important because some metals are potential mutagens able to induce tumors in humans and experimental animals. Chromium can damage DNA in several ways, including DNA double strand breaks (DSBs) which generate chromosomal aberrations, micronucleus formation, sister chromatid exchange, formation of DNA adducts and alterations in DNA r
Genetics and Molecular Biology. Publicado em: 2006
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4. A Golgi study of the sixth layer of the cerebral cortex. II. The gyrencephalic brain of Carnivora, Artiodactyla and Primates.
The sixth layer of the cerebral cortex has been studied by means of the Golgi method in Carnivora (dog and cat), Artiodactyla (cow and sheep), and Primates (human) brains; a basic structural uniformity being observed in all these species. Projection neurons of lamina VIa were large and medium sized pyramidal neurons (including atypical and multiapical), smal
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5. A Golgi study of the sixth layer of the cerebral cortex. I. The lissencephalic brain of Rodentia, Lagomorpha, Insectivora and Chiroptera.
A study of the morphological characteristics of the neurons in layer VI of the cerebral cortex was carried out using the rapid Golgi method in several lissencephalic species including Rodentia (rat, mouse, vole (Microtus agrestis) and hamster), Lagomorpha (rabbit), Insectivora (hedgehog) and in the Chiroptera the dwarf bat (Pipistrellus pipistrellus). There
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6. Structural and numerical chromosome changes in colon cancer develop through telomere-mediated anaphase bridges, not through mitotic multipolarity
Telomere dysfunction has been associated with chromosomal instability in colorectal carcinoma, but the consequences of telomere-dependent instability for chromosome integrity and clonal evolution have been little explored. We show here that abnormally short telomeres lead to a wide spectrum of mitotic disturbances in colorectal cancer cell lines, including a
National Academy of Sciences.
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7. Chromosomal instability and cytoskeletal defects in oral cancer cells
Oral squamous cell carcinomas are characterized by complex, often near-triploid karyotypes with structural and numerical variations superimposed on the initial clonal chromosomal alterations. We used immunohistochemistry combined with classical cytogenetic analysis and spectral karyotyping to investigate the chromosomal segregation defects in cultured oral s
The National Academy of Sciences.
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8. Excessive centrosome abnormalities without ongoing numerical chromosome instability in a Burkitt's lymphoma
Numerical and structural centrosome abnormalities are detected in various human malignancies and have been implicated in the formation of multipolar mitoses, chromosome missegregation, and chromosomal instability. Despite this association between centrosome abnormalities and cancerous growth, a causative role of centrosome aberrations in generating chromosom
BioMed Central.
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9. Characterization of a slowly proliferative cell along the oligodendrocyte differentiation pathway.
A single bipotential glial progenitor cell of newborn rat optic nerve (the O-2A progenitor) characterized by its reactivity with antibodies to surface gangliosides (A2B5) and the presence of vimentin, can grow in microcultures in conditions which favor this progenitor's differentiation into oligodendrocytes. We selected at 8 days larger clones derived from s
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10. TOGp, the Human Homolog of XMAP215/Dis1, Is Required for Centrosome Integrity, Spindle Pole Organization, and Bipolar Spindle Assembly
The XMAP215/Dis1 MAP family is thought to regulate microtubule plus-end assembly in part by antagonizing the catastrophe-promoting function of kin I kinesins, yet XMAP215/Dis1 proteins localize to centrosomes. We probed the mitotic function of TOGp (human homolog of XMAP215/Dis1) using siRNA. Cells lacking TOGp assembled multipolar spindles, confirming resul
The American Society for Cell Biology.
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11. Intracellular dye-marked enkephalin neurons in the magnocellular preoptic nucleus of the goldfish hypothalamus.
A method that combines intracellular recording, dye marking, and immunocytochemistry makes the study of functional and morphological aspects of enkephalin neurons in the magnocellular preoptic nucleus of the goldfish hypothalamus feasible. By use of multiple techniques, enkephalin neurons can be distinguished from other brain cells and can be reconstructed f
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12. Differential regulation of maternal vs. paternal centrosomes
Centrosomes are the main microtubule-organizing centers in animal cells. During meiosis and mitosis, two centrosomes form the poles that direct the assembly of a bipolar spindle, thus ensuring the accurate segregation of chromosomes. Cells cannot tolerate the presence of more than two active centrosomes during meiosis or mitosis because doing so results
The National Academy of Sciences.