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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: pdf
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
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