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Adeno-associated viral vector-mediated expression of NT4-ADNF-9 fusion gene protects against aminoglycoside-induced auditory hair cell loss in vitro
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
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2011 (English)In: Acta Oto-Laryngologica, ISSN 0001-6489, Vol. 131, no 2, 136-141 p.Article in journal (Refereed) Published
Abstract [en]

Conclusion: The present study suggests that adeno-associated viral vector AAV2-mediated expression of activity-dependent neurotrophic factor-9 (ADNF-9) in the cochlea could be a promising approach to protect the cochlea from aminoglycoside-induced impairment, although a further in vivo study is needed. Objectives: To construct vectors over-expressing ADNF-9 to overcome its short half-life and investigate the effect of ADNF-9 on aminoglycoside-induced hair cell impairment. Methods: We ligated ADNF-9 cDNA to the signal and leader peptides of neurotrophin 4 (NT4) and the fusion gene was named NT4-ADNF-9. NT4-ADNF-9 was subcloned into the prokaryotic expression vector pBV220 to obtain pBV220/NT4-ADNF-9. The induced recombinant ADNF-9 proteins were added into the dorsal root ganglia (DRG) cultures of embryonic day 8 chickens. In addition, we constructed the recombinant vector rAAV-NT4-ADNF-9 and transfected rat neonatal organ of Corti explants in the presence of aminoglycoside G418. Results: Our data showed that the induced expression of ADNF-9 protein could promote cultured DRG neuronal survival and neurite outgrowth. In addition, transfection of rAAV-NT4-ADNF-9 could prevent hair cell loss induced by G418 treatment in the rat organ of Corti.

Place, publisher, year, edition, pages
2011. Vol. 131, no 2, 136-141 p.
Keyword [en]
Activity-dependent neurotrophic factor-9, gene therapy, neurotrophin 4, sensorineural hearing loss
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-149084DOI: 10.3109/00016489.2010.518974ISI: 000286647900004PubMedID: 21062116OAI: oai:DiVA.org:uu-149084DiVA: diva2:403990
Available from: 2011-03-15 Created: 2011-03-15 Last updated: 2011-03-15Bibliographically approved

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