Superiority of early relative to late ischemic preconditioning in spinal cord protection after descending thoracic aortic occlusion

Ioannis K. Toumpoulis, John C. Papakostas, Miltiadis I. Matsagas, Vassiliki D. Malamou-Mitsi, Lina S. Pappa, George E. Drossos, Joseph DeRose, Constantine E. Anagnostopoulos

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We previously showed that ischemic preconditioning significantly reduced spinal cord injury caused by 35-minute aortic occlusion. In this study we investigated the effect of ischemic preconditioning on spinal cord injury after 45-minute aortic occlusion. Thirty-two pigs were divided as follows: group 1 (n = 6) underwent sham operation, group 2 (n = 6) underwent 20 minutes of aortic occlusion, group 3 (n = 6) underwent 45 minutes of occlusion, group 4 (n = 6) underwent 20 minutes of occlusion and 48 hours later underwent an additional 45 minutes, and group 5 (n = 8) underwent 20 minutes of occlusion and 80 minutes later underwent an additional 45 minutes. Aortic occlusion was accomplished with two balloon occlusion catheters placed fluoroscopically after the origin of the left subclavian artery and at the aortic bifurcation. Neurologic evaluation was by Tarlov score. The lower thoracic and lumbar spinal cords were harvested at 120 hours and examined histologically with hematoxylin-eosin staining. The number of neurons was counted, and the inflammation was scored (0-4). Statistical analysis was by Kruskal-Wallis and 1-way analysis of variance tests. Group 5 (early ischemic preconditioning) had better Tarlov scores than group 3 (P . 001) and group 4 (late ischemic preconditioning, P . 001). The histologic changes were proportional to the Tarlov scores, with the least histologic damage in the animals of group 5 relative to group 3 (number of neurons P . 001, inflammation P =. 004) and group 4 (number of neurons P . 001, inflammation P =. 006). Early ischemic preconditioning is superior to late ischemic preconditioning in reducing spinal cord injury caused by the extreme ischemia of 45 minutes of descending thoracic aortic occlusion.

Original languageEnglish (US)
Pages (from-to)724-730
Number of pages7
JournalJournal of Thoracic and Cardiovascular Surgery
Volume128
Issue number5
DOIs
StatePublished - Nov 2004
Externally publishedYes

Fingerprint

Ischemic Preconditioning
Spinal Cord
Thorax
Spinal Cord Injuries
Inflammation
Neurons
Balloon Occlusion
Subclavian Artery
Hematoxylin
Eosine Yellowish-(YS)
Nervous System
Analysis of Variance
Swine
Ischemia
Catheters
Staining and Labeling

Keywords

  • 26

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Surgery

Cite this

Toumpoulis, I. K., Papakostas, J. C., Matsagas, M. I., Malamou-Mitsi, V. D., Pappa, L. S., Drossos, G. E., ... Anagnostopoulos, C. E. (2004). Superiority of early relative to late ischemic preconditioning in spinal cord protection after descending thoracic aortic occlusion. Journal of Thoracic and Cardiovascular Surgery, 128(5), 724-730. https://doi.org/10.1016/j.jtcvs.2004.06.031

Superiority of early relative to late ischemic preconditioning in spinal cord protection after descending thoracic aortic occlusion. / Toumpoulis, Ioannis K.; Papakostas, John C.; Matsagas, Miltiadis I.; Malamou-Mitsi, Vassiliki D.; Pappa, Lina S.; Drossos, George E.; DeRose, Joseph; Anagnostopoulos, Constantine E.

In: Journal of Thoracic and Cardiovascular Surgery, Vol. 128, No. 5, 11.2004, p. 724-730.

Research output: Contribution to journalArticle

Toumpoulis, Ioannis K. ; Papakostas, John C. ; Matsagas, Miltiadis I. ; Malamou-Mitsi, Vassiliki D. ; Pappa, Lina S. ; Drossos, George E. ; DeRose, Joseph ; Anagnostopoulos, Constantine E. / Superiority of early relative to late ischemic preconditioning in spinal cord protection after descending thoracic aortic occlusion. In: Journal of Thoracic and Cardiovascular Surgery. 2004 ; Vol. 128, No. 5. pp. 724-730.
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