Canalostomy for Local Drug Delivery into the Inner Ear of an Adult Mouse
Published: May 31, 2024
Abstract
Source: Guo, J. et al., Canalostomy as a Surgical Approach to Local Drug Delivery into the Inner Ears of Adult and Neonatal Mice. J. Vis. Exp. (2018)
This video showcases canalostomy, a procedure that allows local drug delivery into the inner ear of a mouse through the semicircular canal with minimal damage to hearing and vestibular function. This method enables the inoculation of viral vectors, pharmaceuticals, and small molecules into the mouse's inner ear.
Protocol
All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board. 1. Device Preparations To make the injection cannula (Figure 1A), connect polyimide tubing (inner diameter 114.3 µm, outer diameter 139.7 µm, length ~3 cm) to polyethylene tubing (inner diameter 280 µm, outer diameter 640 µm, length ~40 cm). Using superglue, seal the connection with at …
Representative Results
Figure 1: Device preparation. (A) The polyimide tubing (i) and the polyethylene tubing (ii) are sealed to make an injection cannula (iii). (B) The cannula is connected to a 10-µL micro-syringe with a 30 G needle and then installed on a pump. Arrow indicates the cannula tip. (C) Injection reagent and normal saline are separated by an air gap. <p class="jo…
Divulgaciones
The authors have nothing to disclose.
Materials
| Polymide Tubing | A-M Systems | 823400 | |
| Polyethylene Tubing | Scientific Commodities Inc. | BB31695-PE/1 | |
| 10μl Microsyringe | Hamilton Company | 80001 | |
| Xylazine HCL | Sigma-Aldrich Co. Llc. | X-1251 | |
| Operating Miroscope | Carl Zeiss Optical LLC. | Pico | |
| Micro Forceps | Dumont Dumostar | 10576 | |
| Fast-green Dye | Sigma-Aldrich Co. Llc. | F7252 | |
| AAV8-GFP | BioMiao Biological Technology Co. Ltd (Beijing, China) | 20161101 | Titer: 2×10e12 vg/mL |
| Streptomycin Sulfate | Sigma-Aldrich Co. Llc. | S9137 | |
| Microinjection Pump | Stoelting Co. | 789100S | |
| Electric Pad | Pet Fun | 11072931136 | |
| 1 cc Syringe | Mishawa Medical Industries Ltd. (Shanghai, China) | 2011-3151258 | |
| Ketamine HCL | Gutian Pharmaceutical Co., Ltd. (Fujian, China) | H35020148 | |
| Electric Animal Clipper | Codos Electrical Appliances Co., Ltd. (Guangdong, China) | CP-8000 | |
| Cotton Pellet | Yatai Healthcare Ltd. (Henan, China) | Yu-2008-1640081 | |
| Suture | Shanghai Pudong Jinhuan Medical Products Co., Ltd. (Shanghai, China) | Hu-2013-2650207 | |
| Eye Ointment | Beijing Shuangji Pharmaceutical Ltd. (Beijng China) | H11021270 |
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Canalostomy for Local Drug Delivery into the Inner Ear of an Adult Mouse. J. Vis. Exp. (Pending Publication), e22275, doi: (2024).