Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198479
Type: Artigo de periódico
Title: Ultrastructural Characterization Of The New Ng97ht Human-derived Glioma Cell Line Using Two Different Electron Microscopy Technical Procedures.
Author: Machado, Camila Maria Longo
Zorzeto, Tatiane Queiroz
Bianco, Juares E Romero
Rosa, Renata Giardini
Genari, Selma Candelaria
Joazeiro, Paulo Pinto
Verinaud, Liana
Abstract: On the basis of transmission electron microscopy observations in tumor cell lines, oncologists have made innumerous diagnostic and therapeutical progresses. Following this path, the UNICAMP immunopathologies laboratory established the NG97 cell line derived from a human astrocytoma grade III, which when injected to the athymic nude mouse flank developed a grade IV astrocytoma. In this study, we focused on ultrastructural characterization of the NG97 cells after being recovered from xenotransplant (NG97ht). These cells in culture were assayed by two different electron microscopy procedures to characterize ultrastructures related to grade IV astrocytomas and to observe their structures through cell subcultivation. Additionally, comparative morphological descriptions of different cell passages in these technical procedures could be a useful tool for improving electron microscopy cell lineage protocols. Results from many cell passage observations showed ultrastructural similarities, which suggest malignant and glioblastoma phenotypes. In the first procedure, NG97ht cells were harvested and then incorporated into agarose before subjecting them to electron microscopy protocols, whereas in the second one, monolayer cells grew first on cover slides. Comparison among protocols revealed that organelles, cytoplasmatic extensions, spatial conformation of filopodia, and cell attachment to substrate were more preserved in the second procedure. Furthermore, in this latter procedure, a unique ellipsoidal structure was observed, which was already described when dealing with gliosarcoma cell line elsewhere. Therefore, these analyses demonstrated a morphological characterization of a new NG97ht cell line using electron transmission microscopy. Moreover, it has been shown that the second procedure provides more detailed information compared with the first.
Subject: Animals
Astrocytoma
Cell Culture Techniques
Cell Line, Tumor
Humans
Mice
Microscopy, Electron, Transmission
Neoplasm Transplantation
Transplantation, Heterologous
Rights: fechado
Identifier DOI: 10.1002/jemt.20653
Address: http://www.ncbi.nlm.nih.gov/pubmed/19009596
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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