Apoptosis of olfactory receptor neurons induced by bulbectomy / 中华耳鼻咽喉头颈外科杂志
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
;
(12): 297-300, 2006.
Artículo
en Chino
| WPRIM
| ID: wpr-308917
ABSTRACT
<p><b>OBJECTIVE</b>To study whether apoptosis plays a role in controlling the number of olfactory receptor neurons, so as to reveal the specialty and mystery of neurogenesis.</p><p><b>METHODS</b>Using terminal deoxynucleotidyl transferase-mediated dUTP-fluorescein nick end labeling (TUNEL) and transmission electron microscopy to detect apoptosis in olfactory mucosa of normal adult rats and damaged olfactory mucosa of 16, 32, 48 hours and 3, 7, 30 days after bulbectomy.</p><p><b>RESULTS</b>In normal olfactory epithelium, a subpopulation of immature neurons, as well as mature neurons, showed internucleosomal DNA-fragmentation. The number of TUNEL-labeled neurons increased dramatically 32 hours after removal of olfactory bulb. Then it declined quickly and remained at low level. Ultrastructural data of olfactory mucosa showed that the feature of apoptotic neurons was chromatin condensation and cell shrinkage. Besides, some dying cells were characterized by the formation of numerous autophagic vacuoles, and few had some of the features of necrosis but without obvious mitochondrial swelling.</p><p><b>CONCLUSIONS</b>Apoptosis might play a role in turnover of the olfactory epithelium and regeneration in adult rats. There might be other two types of neural death through different mechanism.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Bulbo Olfatorio
/
Patología
/
Periodo Posoperatorio
/
Cirugía General
/
Mucosa Olfatoria
/
Ratas Sprague-Dawley
/
Apoptosis
/
Neuronas Receptoras Olfatorias
/
Biología Celular
Límite:
Animales
Idioma:
Chino
Revista:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
Año:
2006
Tipo del documento:
Artículo
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