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http://repositorio.pediatria.gob.mx:8180/handle/20.500.12103/2617| Título : | Morphological Studies of Nucleologenesis in Giardia lamblia |
| Creador: | Lara Martínez Reyna |
| Nivel de acceso: | Open access |
| Palabras clave : | Nucléolo Celular - química Nucléolo Celular - metabolismo Nucléolo Celular - ultraestructura Núcleo Celular - química Núcleo Celular - metabolismo Núcleo Celular - ultraestructura ADN Ribosómico - metabolismo Giardia lamblia - citología Giardia lamblia - metabolismo Giardia lamblia - ultraestructura Microscopía Electrónica de Transmisión Mitosis - fisiología Proteínas Nucleares - metabolismo Región Organizadora del Nucléolo - química Región Organizadora del Nucléolo - metabolismo Región Organizadora del Nucléolo - ultraestructura Cell Nucleolus/chemistry Cell Nucleolus/metabolism Cell Nucleolus/ultrastructure Cell Nucleus/chemistry Cell Nucleus/metabolism* Cell Nucleus/ultrastructure DNA, Ribosomal/metabolism Giardia lamblia/cytology Giardia lamblia/metabolism* Giardia lamblia - ultrastructure Microscopy, Electron, Transmission Mitosis - physiology Nuclear Proteins/metabolism Nucleolus Organizer Region/chemistry Nucleolus Organizer Region/metabolism* Nucleolus Organizer Region/ultrastructure Giardia lamblia, región del organizador nucleolar, nucleologenesis, nucleolo Giardia lamblia, nucleolar organizer region, nucleologenesis, nucleolus |
| Descripción : | The nucleolus is a nuclear organelle involved in ribosome biogenesis. In most eukaryotes this structure disperses during prophase through anaphase and reorganizes at telophase by a process known as nucleologenesis. This process involves new transcription of ribosomal DNA at the nucleolar organizer region and the formation of prenucleolar bodies fusing to it. In Giardia lamblia, for a long time considered the only anucleolated eukaryote, a very small nucleolus has been recently described. In order to evaluate whether nucleologenesis is also present in Giardia, we analyzed the distribution of nucleolar material during telophase using different light and electron microscopy techniques including silver staining for the nucleolar organizer. Results indicate that in G. lamblia, nucleolar elements persist mainly as an intranuclear peripheral organelle during all stages of division, including telophase, however, no prenucleolar bodies are detected in the nucleoplasm. Therefore, in the parasite, nucleolar material is present throughout cell division including telophase and formation of prenucleolar bodies may not be required for nucleologenesis. Anat Rec, 299:549-556, 2016. © 2016 Wiley Periodicals, Inc. |
| Colaborador(es) u otros Autores: | Segura-Valdez María de Lourdes De La Mora-De La Mora Ignacio López-Velázquez Gabriel Jiménez García Luis Felipe |
| Fecha de publicación : | 2016 |
| Tipo de publicación: | Artículo |
| Formato: | |
| Identificador del Recurso : | 10.1002/ar.23323 |
| Fuente: | Anatomical Record 299(5):549 - 556 |
| URI : | http://repositorio.pediatria.gob.mx:8180/handle/20.500.12103/2617 |
| Idioma: | eng |
| Aparece en las colecciones: | Artículos |
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