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Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia

  • Authors:
    • Lunxu Li
    • Zhengqian Li
    • Yiyun Cao
    • Dongsheng Fan
    • Dehua Chui
    • Xiangyang Guo
  • View Affiliations / Copyright

    Affiliations: Department of Anesthesiology, Peking University Third Hospital, Beijing 100191, P.R. China, Department of Neurology, Peking University Third Hospital, Beijing 100191, P.R. China, Neuroscience Research Institute and Department of Neurobiology, Key Laboratory for Neuroscience, Ministry of Education and Ministry of Public Health, Peking University Health Science Center, Beijing 100083, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 161-168
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    Published online on: April 28, 2016
       https://doi.org/10.3892/etm.2016.3306
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Abstract

There is increasing concern regarding the post­operative cognitive dysfunction (POCD) in the aging population, and general anesthetics are believed to be involved. Isoflurane exposure induced increased N-methyl-D-aspartic acid receptor (NMDAR) GluN2B subunit expression following anesthesia, which was accompanied by alteration of the cognitive function. However, whether isoflurane affects this expression in different subcellular compartments, and is involved in the development of POCD remains to be elucidated. The aims of the study were to investigate the effects of isoflurane on the expression of the synaptic and extrasynaptic NMDAR subunits, GluN2A and GluN2B, as well as the associated alteration of cognitive function in aged rats. The GluN2B antagonist, Ro25-6981, was given to rats exposed to isoflurane to determine the role of GluN2B in the isoflurane-induced alteration of cognitive function. The results showed that spatial learning and memory tested in the Morris water maze (MWM) was impaired at least 7 days after isoflurane exposure, and was returned to control levels 30 days thereafter. Ro25‑6981 treatment can alleviate this impairment. Extrasynaptic GluN2B protein expression, but not synaptic GluN2B or GluN2A, increased significantly after isoflurane exposure compared to non-isoflurane exposure, and returned to control levels approximately 30 days thereafter. The results of the present study indicated that isoflurane induced the prolonged upregulation of extrasynaptic GluN2B expression after anesthesia and is involved in reversible cognitive impairment.
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Copy and paste a formatted citation
Spandidos Publications style
Li L, Li Z, Cao Y, Fan D, Chui D and Guo X: Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia. Exp Ther Med 12: 161-168, 2016.
APA
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., & Guo, X. (2016). Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia. Experimental and Therapeutic Medicine, 12, 161-168. https://doi.org/10.3892/etm.2016.3306
MLA
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., Guo, X."Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia". Experimental and Therapeutic Medicine 12.1 (2016): 161-168.
Chicago
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., Guo, X."Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia". Experimental and Therapeutic Medicine 12, no. 1 (2016): 161-168. https://doi.org/10.3892/etm.2016.3306
Copy and paste a formatted citation
x
Spandidos Publications style
Li L, Li Z, Cao Y, Fan D, Chui D and Guo X: Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia. Exp Ther Med 12: 161-168, 2016.
APA
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., & Guo, X. (2016). Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia. Experimental and Therapeutic Medicine, 12, 161-168. https://doi.org/10.3892/etm.2016.3306
MLA
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., Guo, X."Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia". Experimental and Therapeutic Medicine 12.1 (2016): 161-168.
Chicago
Li, L., Li, Z., Cao, Y., Fan, D., Chui, D., Guo, X."Increased extrasynaptic GluN2B expression is involved in cognitive impairment after isoflurane anesthesia". Experimental and Therapeutic Medicine 12, no. 1 (2016): 161-168. https://doi.org/10.3892/etm.2016.3306
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