PMID- 16721606 OWN - NLM STAT- MEDLINE DCOM- 20071002 LR - 20220409 IS - 0014-4819 (Print) IS - 0014-4819 (Linking) VI - 175 IP - 1 DP - 2006 Oct TI - Glyceraldehyde-3-phosphate dehydrogenase versus toluidine blue as a marker for infarct volume estimation following permanent middle cerebral artery occlusion in mice. PG - 60-7 AB - Infarct size is a good predictor of the neurological outcome following stroke. Estimation of infarct size in the early phase following experimental stroke depends on the availability of reliable techniques that can distinguish ischemic from nonischemic tissue. The objective of this study was to provide a simple and robust method for reliable delineation of the ischemic infarct area in fresh frozen cryosections from mice subjected to focal cerebral ischemia. Mice were subjected to permanent middle cerebral artery (MCA) occlusion and euthanised after 30 min, 1, 2, 4, 6, 12 and 24 h. The size of the developing infarct was compared in parallel series of sections in situ hybridized for mRNA encoding the enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) or stained with toluidine blue (TB). The infarct was clearly delineated in GAPDH mRNA in situ hybridized sections as soon as 4 h after MCA occlusion. Infarct size was similar at 4 and 6 h in GAPDH mRNA in situ hybridized sections. Sections hybridized for GAPDH mRNA showed significantly larger infarcts than sections stained with TB after 6 h but not after 24 h of ischemia. Analysis of in situ hybridized sections revealed changes in neuronal GAPDH mRNA in areas prone to undergo degeneration 30 min to 1 h after MCA occlusion, thereby preceding visible pycnosis in TB-stained sections. The results showed that in situ hybridization for GAPDH mRNA was a reliable method and superior to TB staining for precise infarct delineation prior to 6 h of permanent MCA occlusion. FAU - Clausen, Bettina H AU - Clausen BH AD - Medical Biotechnology Center, University of Southern Denmark Odense, Winsloewparken 25, Odense C, Denmark. bclausen@health.sdu.dk FAU - Lambertsen, Kate L AU - Lambertsen KL FAU - Finsen, Bente AU - Finsen B LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060524 PL - Germany TA - Exp Brain Res JT - Experimental brain research JID - 0043312 RN - 15XUH0X66N (Tolonium Chloride) RN - EC 1.2.1.- (Glyceraldehyde-3-Phosphate Dehydrogenases) SB - IM MH - Animals MH - *Brain Infarction/etiology/metabolism/pathology MH - Gene Expression Regulation/physiology MH - Glyceraldehyde-3-Phosphate Dehydrogenases/genetics/*metabolism MH - In Situ Hybridization/methods MH - Infarction, Middle Cerebral Artery/*complications/pathology MH - Male MH - Mice MH - Statistics, Nonparametric MH - Time Factors MH - *Tolonium Chloride EDAT- 2006/05/25 09:00 MHDA- 2007/10/03 09:00 CRDT- 2006/05/25 09:00 PHST- 2006/01/02 00:00 [received] PHST- 2006/04/24 00:00 [accepted] PHST- 2006/05/25 09:00 [pubmed] PHST- 2007/10/03 09:00 [medline] PHST- 2006/05/25 09:00 [entrez] AID - 10.1007/s00221-006-0526-3 [doi] PST - ppublish SO - Exp Brain Res. 2006 Oct;175(1):60-7. doi: 10.1007/s00221-006-0526-3. Epub 2006 May 24.