Open Access

Effects of propofol on LC3II and mTOR/p‑mTOR expression during ischemia‑reperfusion myocardium injury in rats with type 2 diabetes mellitus

  • Authors:
    • Ying Wang
    • Kecheng Zhang
    • Xiuru Qi
    • Guang Yang
    • Hongjie Wang
    • Zhe Zhang
    • Baofeng Yang
  • View Affiliations

  • Published online on: February 7, 2020     https://doi.org/10.3892/etm.2020.8499
  • Pages: 2441-2448
  • Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

To investigate the effects of propofol on myocardial ischemia reperfusion in rats with type 2 diabetes, male adult rats were divided into five groups: Sham‑operation (CC), ischemia‑reperfusion (CI), low‑dose propofol (LP), moderate‑dose propofol (MP) and high‑dose propofol (HP). The LP, MP and HP groups were administered with 6, 12 and 24 mg/kg/h propofol, respectively, prior to occlusion. Heart rate (HR), left ventricular systolic pressure (LVSP) and the rate (dp/dt max) of left ventricular pressure rise in early systole (±dp/dt max) were recorded. The role of autophagy was also studied by measuring the levels of superoxide dismutase (SOD), malondialdehyde (MDA), autophagy marker protein LC3II, mammalian target of rapamycin (mTOR)/phosphorylate (p)‑mTOR and cardiac troponin T (cTnT). The myocardial morphological features were assessed using light and electron microscopy. The present results demonstrated that the HR, LVSP, +dp/dt and ‑dp/dt levels in the propofol groups (LP, MP and HP) were significantly increased (P<0.05) when compared with the CI group. The myocardial cells in the MP group showed mild edematous changes and partially dissolved mitochondrial cristae and membrane rupture. SOD, cTnT and MDA levels were significantly decreased (P<0.05), mTOR expression decreased significantly (P<0.05) and p‑mTOR expression increased significantly in the MP group (P<0.05). The present study demonstrated the protective effects of propofol in T2DM rats exhibiting MIRI, with an optimal protective effect at an infusion rate of 12 mg/kg/h. Additionally, the results revealed that propofol led to significant reductions in LC3II and mTOR serum levels and the inhibition of autophagy in myocardial cells.
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April-2020
Volume 19 Issue 4

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Wang Y, Zhang K, Qi X, Yang G, Wang H, Zhang Z and Yang B: Effects of propofol on LC3II and mTOR/p‑mTOR expression during ischemia‑reperfusion myocardium injury in rats with type 2 diabetes mellitus. Exp Ther Med 19: 2441-2448, 2020.
APA
Wang, Y., Zhang, K., Qi, X., Yang, G., Wang, H., Zhang, Z., & Yang, B. (2020). Effects of propofol on LC3II and mTOR/p‑mTOR expression during ischemia‑reperfusion myocardium injury in rats with type 2 diabetes mellitus. Experimental and Therapeutic Medicine, 19, 2441-2448. https://doi.org/10.3892/etm.2020.8499
MLA
Wang, Y., Zhang, K., Qi, X., Yang, G., Wang, H., Zhang, Z., Yang, B."Effects of propofol on LC3II and mTOR/p‑mTOR expression during ischemia‑reperfusion myocardium injury in rats with type 2 diabetes mellitus". Experimental and Therapeutic Medicine 19.4 (2020): 2441-2448.
Chicago
Wang, Y., Zhang, K., Qi, X., Yang, G., Wang, H., Zhang, Z., Yang, B."Effects of propofol on LC3II and mTOR/p‑mTOR expression during ischemia‑reperfusion myocardium injury in rats with type 2 diabetes mellitus". Experimental and Therapeutic Medicine 19, no. 4 (2020): 2441-2448. https://doi.org/10.3892/etm.2020.8499