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Open Access Research article

Proteomic profiling of the phosphoproteins in the rat thalamus, hippocampus and frontal lobe after propofol anesthesia

Jing Tang1, Qiong Xue12, Hong Ding1, Zaisheng Qin1, Jinfang Xiao1, Chunshui Lin1, Youtan Liu3* and Tao Tao1*

Author Affiliations

1 Department of Anesthesia, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China

2 Department of Anesthesia, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China

3 Department of Anesthesiology, The University of Hongkong Shenzhen Hospital, Shenzhen, China

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BMC Anesthesiology 2014, 14:3  doi:10.1186/1471-2253-14-3

Published: 10 January 2014

Abstract

Background

Propofol is a safe and effective intravenous anesthetic that is widely used for the induction and maintenance of anesthesia during surgery. However, the mechanism by which propofol exerts its anesthetic effect remains unknown. The rapid onset of phosphorylation modifications coincides with that of propofol anesthesia.

Methods

Propofol-anesthetized rat models were built and phosphorylated proteins in the thalamus, hippocampus and frontal lobe were enriched the to analyze the changes in these phosphoproteins after propofol anesthesia.

Results

Sixteen of these phosphoprotein spots were successfully identified using MALDI-TOF MS and a subsequent comparative sequence search in the Mascot database. Of these proteins, keratin 18 and the tubulin 2c chain are cytoskeletal proteins; keratin 18 and gelsolin are relevant to alcohol drowsiness. Based on Western blot analysis, we also confirmed that the phosphorylation of these proteins is directly induced by propofol, indicating that propofol anesthesia may be relevant to cytoskeletal proteins and alcohol drowsiness.

Conclusions

These identified propofol-induced phosphorylations of proteins provide meaningful contributions for further studying the anesthetic mechanism of propofol.

Keywords:
2D-gel electrophoresis; Anesthesia; Phosphorylation; Propofol; Rats