Back to Search
Start Over
Oral Administration of TrkB Agonist, 7, 8–Dihydroxyflavone Regenerates Hair Cells and Restores Function after Gentamicin–Induced Vestibular Injury in Guinea Pig.
- Source :
-
Pharmaceutics . Feb2023, Vol. 15 Issue 2, p493. 16p. - Publication Year :
- 2023
-
Abstract
- The causes of vestibular dysfunction include the loss of hair cells (HCs), synapses beneath the HCs, and nerve fibers. 7, 8–dihydroxyflavone (DHF) mimics the physiological functions of brain-derived neurotrophic factor. We investigated the effects of the orally-administered DHF in the guinea pig crista ampullaris after gentamicin (GM)-induced injury. Twenty animals treated with GM received daily administration of DHF or saline for 14 or 28 days (DHF (+) or DHF (−) group; N = 5, each). At 14 days after GM treatment, almost all of the HCs had disappeared in both groups. At 28 days, the HCs number in DHF (+) and DHF (−) groups was 74% and 49%, respectively, compared to GM-untreated control. In the ampullary nerves, neurofilament 200 positive rate in the DHF (+) group was 91% at 28 days, which was significantly higher than 42% in DHF (−). On day 28, the synaptic connections observed between C–terminal–binding protein 2-positive and postsynaptic density protein-95-positive puncta were restored, and caloric response was significantly improved in DHF (+) group (canal paresis: 57.4% in DHF (+) and 100% in DHF (−)). Taken together, the oral administration of DHF may be a novel therapeutic approach for treating vestibular dysfunction in humans. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19994923
- Volume :
- 15
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Pharmaceutics
- Publication Type :
- Academic Journal
- Accession number :
- 162158941
- Full Text :
- https://doi.org/10.3390/pharmaceutics15020493