Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10201/18954

Título: 55-Azacytidine (5Az) inducesapoptosis in PC12 cells: a model for 5Az-induced apoptosis in developing neuronal cells
Fecha de publicación: 1997
Editorial: Murcia : F. Hernández
ISSN: 0213-3911
Materias relacionadas: CDU::6 - Ciencias aplicadas::61 - Medicina
Palabras clave: Apoptosis
5-Azacytidine
Resumen: Our previous in vivo and in vitro studies showed that 5-azacytidine (5Az), a cytidine analog, induced apoptosis in developing neuronal cells in mice. To develop a system in which the precise molecular mechanism of 5Az-induced apoptosis in developing neuronal cells could be elucidated, we carried out the present study with PC12 cells. These cells are derived from a rat pheochromocytoma and extrude neurites in response to nerve growth factor (NGF). Light microscopy showed dose-dependent pyknotic and karyorrhectic changes in undifferentiated PC12 cells. Although they were less sensitive to 5Az, NGF-treated differentiated cells showed the same changes. Analysis by the TUNEL method (an in situ method for the detection of apoptosis) showed positive signals in the pyknotic and fragmented nuclei of these cells. Transmission electron microscopy revealed margination, segmentation, and condensation of nuclear chromatin, cell body shrinkage, and cytoplasmic vacuolization. Scanning electron microscopy demonstrated bleb formation on the cell surface. These pathomorphological changes are typical of apoptosis. 5Az seemed to affect cells that were in the proliferative stage; when the cells were terminally differentiated, their sensitivity to 5Az appeared to decline. PC12 cells could be used as a pathomorphological and biochemical model for studies of 5Az-induced neuronal cell apoptosis at the molecular and genetic level.
Autor/es principal/es: Hossain, M.M.
Nakayama, Hiroyuki
Takashima, A.
Goto, N.
Doi, K.
Forma parte de: Histology and histopathology
URI: http://hdl.handle.net/10201/18954
Tipo de documento: info:eu-repo/semantics/article
Número páginas / Extensión: 7
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:Vol.12, nº 2 (1997)



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