Effects of adenoviral vector-mediated BDNF expression on the bulbectomy-induced apoptosis of olfactory receptor neurons.
The expression of adenoviral vector (Ad)-mediated lacZ and brain-derived neurotrophic factor (BDNF) in mouse olfactory epithelium (OE) was examined, and the effect of BDNF on the survival of the bulbectomized OE was evaluated. A recombinant adenovirus, Ax1CAlacZ, was administrated into the mouse OE after bulbectomy, and the expression of a transferred E. coli beta-galactosidase (beta-gal) gene was confirmed by X-gal staining. The expression and effects of exogenous BDNF in the OE after bulbectomy were examined using immunohistochemistry and the TUNEL method. The adenoviral vector-mediated expression of beta-gal in the mouse OE was detectable for up to 14 days after bulbectomy in vivo. The Ad-mediated expression of BDNF was also observed in the OE after bulbectomy. Exogenously induced BDNF suppressed the degenerative changes of bulbectomized OE. TUNEL staining indicated that the exogenous BDNF enhanced the survival of the bulbectomized OE by inhibiting apoptosis. Ad-mediated expression of BDNF in the mouse nasal mucosa alleviated degenerative changes in bulbectomized OE. Ad-mediated transfer of neurotrophic factors might be applicable in the treatment of olfactory disorders.
Department of Otorhinolaryngology (J2), Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chiba 260-8670, Japan.
Kyoko
K
Isoyama
Hiroshi
H
Nagata
Yuji
Y
Shino
Naohisa
N
Isegawa
Yukiko
Y
Arimoto
Masao
M
Koda
Keiichiro
K
Kumahara
Yoshitaka
Y
Okamoto
Hiroshi
H
Shirasawa
D000256:Adenoviridae / Q000235:genetics* / Q000378:metabolism; D000818:Animals; D017209:Apoptosis / Q000502:physiology*; D019208:Brain-Derived Neurotrophic Factor / Q000235:genetics / Q000378:metabolism*; D002470:Cell Survival; D005260:Female; D017930:Genes, Reporter; D005822:Genetic Vectors; D006367:HeLa Cells; D006801:Humans; D020287:In Situ Nick-End Labeling; D051379:Mice; D008807:Mice, Inbred BALB C; D009830:Olfactory Bulb / Q000033:anatomy & histology / Q000601:surgery*; D018034:Olfactory Receptor Neurons / Q000166:cytology / Q000502:physiology*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism
D019208:Brain-Derived Neurotrophic Factor; D011993:Recombinant Fusion Proteins