• ISSN 1674-8301
  • CN 32-1810/R
Volume 33 Issue 4
Jul.  2019
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Zhong Caiyun, Qiu Hong, Chen Jun, Liu Hong. Effects of volatile anesthetic preconditioning on expression of NFκB-regulated genes in aged rat myocardium[J]. The Journal of Biomedical Research, 2019, 33(4): 264-270. doi: 10.7555/JBR.32.20170071
Citation: Zhong Caiyun, Qiu Hong, Chen Jun, Liu Hong. Effects of volatile anesthetic preconditioning on expression of NFκB-regulated genes in aged rat myocardium[J]. The Journal of Biomedical Research, 2019, 33(4): 264-270. doi: 10.7555/JBR.32.20170071

Effects of volatile anesthetic preconditioning on expression of NFκB-regulated genes in aged rat myocardium

doi: 10.7555/JBR.32.20170071
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  • Corresponding author: Hong Liu, Department of Anesthesiology and Pain Medicine, University of California, Davis Health, 4150 V Street Suite 1200, Sacramento, CA 95817, USA. Tel/Fax: (916) 734-5031/(916) 734-7980, Email: hualiu@ucdavis.edu
  • Received: 2017-07-09
  • Revised: 2017-08-17
  • Accepted: 2017-10-20
  • Published: 2017-11-21
  • Issue Date: 2019-07-01
  • Volatile anesthetic preconditioning has been shown to be a potent way to provide myocardium protection against ischemia/reperfusion (I/R) injury; however, this cardioprotection is lost in senescent animal models and elderly patients. NFκB-regulated genes have been linked to myocardial I/R injury and anesthetic preconditioning. Here, we investigated NFκB activation related to anesthetic preconditioning in aging rat myocardium. Isolated, Langendorff perfused rat hearts from Fischer 344 male rats, 24 months old, were randomly assigned to one of the three groups. The hearts of the control group were perfused with physiologic solution without any intervention. The hearts in the I/R group were subjected to 25 minutes ischemia and followed by 60 minutes reperfusion. The hearts in the treatment group were subjected to 10 minutes 2.5% sevoflurane, followed by 20 minutes washout and by 25 minutes ischemia and 60 minutes of reperfusion, respectively. Left ventricular developed pressure (LVDP) and left ventricular enddiastolic pressure (LVEDP) were measured. Western blot analysis was used to measure inhibitor of κB (IκB) and antiapoptotic genes: A1, ILP, c-IAP-2, Bcl-2, caspase 8 and caspase 9. Ischemia and reperfusion significantly decreased LVDP and increased LVEDP in aged rat hearts. Anesthetic preconditioning with sevoflurane did not change the effects I/R on LVDP and LVEDP, despite the fact that after treatment with anesthetic preconditioning, the levels of IκB, A1, ILP, caspase 8 and caspase 9 were significantly different compared to those of the control hearts. In conclusion, anesthetic preconditioning with sevoflurane does not improve myocardial systolic and diastolic functions. Our results suggest that the activation of NFκB regulated genes is different in the senescent myocardium and could account for loss of cardioprotection with aging.

     

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