PMID- 16725117 OWN - NLM STAT- MEDLINE DCOM- 20061006 LR - 20181113 IS - 0006-8993 (Print) IS - 1872-6240 (Electronic) IS - 0006-8993 (Linking) VI - 1097 IP - 1 DP - 2006 Jun 30 TI - Cerebral preconditioning using cortical application of hypertonic salt solutions: upregulation of mRNAs encoding inhibitors of inflammation. PG - 31-8 AB - Previous studies have demonstrated that local application of hypertonic KCl or NaCl to the cerebral cortex induces tolerance to a subsequent episode of ischemia. The objective of the present study was to determine whether application of these salts increases the levels of mRNAs encoding inhibitors of inflammation. Hypertonic KCl or NaCl was applied for 2 h to the frontal cortex of Sprague-Dawley rats. After recovery periods up to 24 h, levels of selected mRNAs were measured in samples from frontal and parietal cortex using Northern blots. Application of hypertonic KCl caused a rapid and widespread increase in the levels of mRNA coding for tumor necrosis factor (TNF), tristetraprolin (TTP), suppressor of cytokine signaling-3 (SOCS3), and brain-derived neurotrophic factor (BDNF), and a 24-h delayed induction of ciliary neurotrophic factor (CNTF) mRNA. Application of hypertonic NaCl caused alterations in mRNA levels that were restricted to the frontal cortex. In this region, application of NaCl rapidly increased levels of mRNA encoding TNF, TTP, and SOCS3, but not BDNF, and caused a delayed induction of CNTF mRNA. These results raise the possibility that upregulation of inhibitors of inflammation after preconditioning may contribute to the induction of tolerance to ischemia. FAU - Muramatsu, Hiromi AU - Muramatsu H AD - Department of Neurosurgery, University of Pennsylvania School of Medicine, 371 Stemmler Hall, Box 44, 36th and Hamilton Walk, Philadelphia, PA 19104, USA. FAU - Welsh, Frank A AU - Welsh FA FAU - Kariko, Katalin AU - Kariko K LA - eng GR - R01 NS029331/NS/NINDS NIH HHS/United States GR - T32 NS043126/NS/NINDS NIH HHS/United States GR - NS29331/NS/NINDS NIH HHS/United States GR - NS43126/NS/NINDS NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20060524 PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Hypertonic Solutions) RN - 0 (RNA, Messenger) RN - 451W47IQ8X (Sodium Chloride) RN - 660YQ98I10 (Potassium Chloride) SB - IM MH - Animals MH - Brain Ischemia/genetics/*metabolism/*prevention & control MH - Cerebral Cortex/*drug effects/metabolism MH - Hypertonic Solutions/*administration & dosage MH - Male MH - Potassium Chloride/administration & dosage MH - RNA, Messenger/*biosynthesis/genetics MH - Rats MH - Rats, Sprague-Dawley MH - Sodium Chloride/administration & dosage MH - Up-Regulation/*drug effects/physiology PMC - PMC3619415 MID - NIHMS451991 EDAT- 2006/05/27 09:00 MHDA- 2006/10/07 09:00 PMCR- 2013/04/08 CRDT- 2006/05/27 09:00 PHST- 2006/02/04 00:00 [received] PHST- 2006/04/14 00:00 [revised] PHST- 2006/04/18 00:00 [accepted] PHST- 2006/05/27 09:00 [pubmed] PHST- 2006/10/07 09:00 [medline] PHST- 2006/05/27 09:00 [entrez] PHST- 2013/04/08 00:00 [pmc-release] AID - S0006-8993(06)01162-0 [pii] AID - 10.1016/j.brainres.2006.04.067 [doi] PST - ppublish SO - Brain Res. 2006 Jun 30;1097(1):31-8. doi: 10.1016/j.brainres.2006.04.067. Epub 2006 May 24.