Development of a simplified spinal cord ischemia model in mice.

Published

Journal Article

Use of genetically manipulated mice facilitates understanding pathological mechanisms in many diseases and contributes to therapy development. However, there is no practical and clinically relevant mouse model available for spinal cord ischemia. This report introduces a simplified long-term outcome mouse model of spinal cord ischemia. Male C57Bl/6J mice were anesthetized with isoflurane and endotracheally intubated. The middle segment of the thoracic aorta was clamped for 0, 8, 10 or 12 min via left lateral thoracotomy. Rectal temperature was maintained at 37.0+/-0.5 degrees C. A laser Doppler probe was used to measure lumbar spinal cord blood flow during thoracic aorta cross-clamping. Open field locomotor function and rotarod performance were evaluated at 1h and 1, 3, 5, and 7 days post-injury. Surviving neurons in the lumbar ventral horn were counted at 7 days post-injury. Cross-clamping the middle segment of the thoracic aorta resulted in approximately 90% blood flow reduction in the lumbar spinal cord. Neurological deficit and neuronal cell death were associated with ischemia duration. Another set of mice were subjected to 10 min aortic clamping or sham surgery and neurological function was examined at 1h and 1, 3, 5, 7, 14, and 28 days. Four of 5 mice (80%) in the injured group survived 28 days and had significant neurological deficit. This study indicates that cross-clamping of the aorta via left thoracotomy is a simple and reliable method to induce spinal cord ischemia in mice allowing definition of long-term outcome.

Full Text

Duke Authors

Cited Authors

  • Wang, Z; Yang, W; Britz, GW; Lombard, FW; Warner, DS; Sheng, H

Published Date

  • June 15, 2010

Published In

Volume / Issue

  • 189 / 2

Start / End Page

  • 246 - 251

PubMed ID

  • 20394775

Pubmed Central ID

  • 20394775

Electronic International Standard Serial Number (EISSN)

  • 1872-678X

Digital Object Identifier (DOI)

  • 10.1016/j.jneumeth.2010.04.003

Language

  • eng

Conference Location

  • Netherlands