쥐 시신경에 주입을위한 최소 침습 기술
Summary
Direct injection into the rat optic nerve is useful for regenerative research. We demonstrate a minimally-invasive technique for direct injection into a rat optic nerve that does not involve opening the skull. Using this method, surgical complications are minimized and recovery is more rapid.
Abstract
The rat optic nerve is a useful model for stem cell regeneration research. Direct injection into the rat optic nerve allows delivery into the central nervous system in a minimally-invasive surgery without bone removal. This technique describes an approach to visualization and direct injection of the optic nerve following minor fascial dissection from the orbital ridge, using a conjunctival traction suture to gently pull the eye down and out. Representative examples of an injected optic nerve show successful injection of dyed beads.
Introduction
시신경은 중추 신경계 (CNS) 등 시신경염, 녹내장 및 외상 등의 안과 조건을 포함 재생 연구를위한 이상적인 위치를 제공합니다. 줄기 세포의 다양한 주사 어느 축삭 카운트를 증가 및 / 또는 퇴행성 질환 예방 효능을 입증되거나 손실 미엘린 장착에 약속을 보여 주었다. 1,2
인간의 시신경이 약 3.0-3.5 mm의 직경 chiasm에 망막에서 여행 약 120 만 병렬 축삭이 포함되어 있습니다. (3) 실험실에서 인간의 질병을 모델링하기 위해, 쥐가 자주 사용되어왔다. 성인 쥐의 시신경은 약 0.5 mm의 직경 내에서 약 10 만 축삭이 포함되어 있습니다. 중추 신경계의 주요 제한 4 중 하나를 재생 연구 직접 뼈없는 액세스입니다. 동물에 합병증 및 수술 위험은 두개골이나 척추가 제거 될 때 더 높다. 의 장점과 유사척추 최소 침습 방법, 두개골의 서비스 감소 합병증과 더 빠른 회복을 열지 않고 5 직접 시신경 주사.
이 기법은 이전 연구에서 이용되고있다. (6)이 원고 및 첨부 영상에서는 쥐 시신경에 줄기 세포를 주입하는 최소 침습 절차를 보여준다.
Protocol
Representative Results
Discussion
Direct injection into the optic nerve of stem cells or other products intended to facilitate regeneration provides a convenient model compared to other means of injections into the CNS. This technique takes less time, requires less total anesthesia, avoids drilling or removing skull or bone tissue, reduces complications rates and allows for more rapid recovery following surgery.
The most critical steps in this protocol include: 1. Adequate hemostasis in the surgical field to allow clear visua…
Declarações
The authors have nothing to disclose.
Acknowledgements
This study was supported by NeuralStem, Inc., and Johns Hopkins Project RESTORE.
Materials
| Name of Material/ Equipment | Company | Catalog Number | Comments/Description |
| Lewis rat | Charles River | 4 | Any rat strain will work. |
| Anesthesia machine | Surgivet | CDS9000 | CDS 9000 Small Animal Anesthesia Machine – Pole Mount |
| Infusion pump | Stoelting | 53129 | |
| Dissection microscope | National Optical | 409-411-1105 | |
| Fiber-optic light source | Fisher Scientific | 12-562-21 | |
| Dissection and Stereotaxic Instrument | Stoelting | 51400 | |
| Pipette Puller | Kopf | 750 | |
| Pipettes | World Precision Instruments | 18150-6 | |
| Disposable scalpel blades | Harvard Apparatus | 810-15-021 | |
| Iridectomy scissors | Electron Microscopy Sciences | Uniband LA-4XF |
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