Abstract:
CONCLUSION:Cochleostomy is the most efficient approach in delivering PEG-b-PCL polymersomes (PMs) to the inner ear. PMs can be delivered to the vestibule by transtympanic injection or cochleostomy. OBJECTIVE:To evaluate the efficiency of delivering PEG-b-PCL PMs into the inner ear using different approaches. METHODS:The PEG-b-PCL PMs were administered either by sustained topical round window membrane (RWM) delivery using gelatin sponge pledgets in combination with an osmotic pump, transtympanic injection, or cochleostomy. The distribution of the PMs in the inner ear was observed by confocal microscopy using either whole mount specimens or cryosections. RESULTS:Cochleostomy resulted in distribution of the PMs in the spiral ligament (SL), mesothelial cells beneath the organ of Corti, supporting cells in the organ of Corti, and spiral ganglion cells (SGCs). Transtympanic injection induced uptake of the PMs in the SL and mesothelial cells beneath the organ of Corti. Topical administration showed distribution of the PMs only in the SL. In the vestibulum, transtympanic injection and cochleostomy induced more distribution of the PMs than did topical RWM delivery (p < 0.05, Kruskal-Wallis test).
journal_name
Acta Otolaryngoljournal_title
Acta oto-laryngologicaauthors
Zhang Y,Zhang W,Johnston AH,Newman TA,Pyykk I,Zou Jdoi
10.3109/00016489.2011.615066subject
Has Abstractpub_date
2011-12-01 00:00:00pages
1249-56issue
12eissn
0001-6489issn
1651-2251journal_volume
131pub_type
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