Submit Data |  Help |  Video Tutorials |  News |  Publications |  FTP Download |  REST API |  Citing RGD |  Contact   

Long-term hypothermia reduces infarct volume in aged rats after focal ischemia.

Authors: Florian, B  Vintilescu, R  Balseanu, AT  Buga, AM  Grisk, O  Walker, LC  Kessler, C  Popa-Wagner, A 
Citation: Florian B, etal., Neurosci Lett. 2008 Jun 20;438(2):180-5. Epub 2008 Apr 10.
Pubmed: (View Article at PubMed) PMID:18456407
DOI: Full-text: DOI:10.1016/j.neulet.2008.04.020

In aged humans, stroke is a major cause of disability for which no neuroprotective measures are available. A viable alternative to conventional drug-based neuroprotective therapies is brain/body cooling, or hypothermia. In animal studies of focal ischemia, short-term hypothermia consistently reduces infarct size. Nevertheless, efficient neuroprotection requires long-term, regulated lowering of whole body temperature. Focal cerebral ischemia was produced by reversible occlusion of the right middle cerebral artery in 17-month-old male Sprague-Dawley rats. After stroke, the aged rats were exposed for 2 days to a mixture of air and a mild inhibitor of oxidative phosphorylation, hydrogen sulfide (H(2)S), which resulted in sustained, deep hypothermia (30.8+/-0.7 degrees C). Long-term hypothermia led to a 50% reduction in infarct size with a concomitant reduction in the number of phagocytic cells. At the transcription level, hypothermia caused a reduction in the mRNA coding for caspase 12, NF-kappa B and grp78 in the peri-infarcted region, suggesting an overall decrease in the transcriptional activity related to inflammation and apoptosis. Behaviorally, hypothermia was associated with better performance on tests that require complex sensorimotor skills, in the absence of obvious neurological deficits or physiological side effects, in aged rats. Conclusions: Prolonged, H(2)S-induced hypothermia is a simple and efficacious method to limit the damage inflicted by stroke in aged rats.

Annotation

Gene Ontology Annotations
Objects Annotated

Additional Information

 
RGD Object Information
RGD ID: 2311457
Created: 2009-07-17
Species: All species
Last Modified: 2009-07-17
Status: ACTIVE



NHLBI Logo

RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.