A reversible component of cerebral injury as identified by the histochemical stain 2,3,5-triphenyltetrazolium chloride (TTC)
✍ Scribed by D. J. Cole; J. C. Drummond; E. A. Ghazal; H. M. Shapiro
- Publisher
- Springer-Verlag
- Year
- 1990
- Tongue
- English
- Weight
- 800 KB
- Volume
- 80
- Category
- Article
- ISSN
- 0001-6322
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✦ Synopsis
The extent of histochemical change following middle cerebral artery occlusion was quantitatively determined in three groups of Sprague-Dawley rats with 2,3,5-triphenyltetrazolium chloride (a marker of mitochondrial oxidative enzyme function). In group I (n = 7) occlusion was maintained for 3 h, with immediate sacrifice. In group II (n = 7) occlusion was maintained for 5 h, with immediate sacrifice. In group III (n = 7) occlusion was maintained for 3 h, followed by a 2-h period of reperfusion prior to sacrifice. The area of injury was significantly larger (P less than 0.05) in the 5-h occlusion group [15 +/- 4% (mean +/- SD)] compared to the 3-h occlusion group (9 +/- 2%); indicating a time-dependent worsening of the histochemical detection of injury. However, the area of injury was significantly less in the reperfusion group (5 +/- 2%) compared to the group that was evaluated after 3 h of occlusion without reperfusion (9 +/- 2%); indicating that some component of the injury revealed by 2,3,5-triphenyltetrazolium chloride is potentially reversible. These data suggest that contrary to previous understanding, the histochemical abnormality revealed by 2,3,5-triphenyltetrazolium chloride is reversible in some circumstances and does not necessarily represent inevitable infarction.