2. Academic Validation
  3. A53T α-synuclein mutation increases susceptibility to postoperative delayed neurocognitive recovery via hippocampal Ang-(1-7)/MasR axis

A53T α-synuclein mutation increases susceptibility to postoperative delayed neurocognitive recovery via hippocampal Ang-(1-7)/MasR axis

  • Biochem Pharmacol. 2024 Jun:224:116261. doi: 10.1016/j.bcp.2024.116261.
Jingshu Hong 1,  Yue Li 1,  Lei Chen 1,  Dengyang Han 1,  Yitong Li 1,  Xinning Mi 1,  Kaixi Liu 1,  Qian Wang 1,  Yanan Song 2,  Taotao Liu 1,  Ning Yang 1,  Yajie Liu 1,  Zhengqian Li 3,  Xiangyang Guo 4
Affiliations

Affiliations

  • 1 Department of Anesthesiology, Peking University Third Hospital, No. 49, North Garden Street, Haidian District, Beijing 100191, China.
  • 2 Department of Anesthesiology, Peking University Third Hospital, No. 49, North Garden Street, Haidian District, Beijing 100191, China; Beijing Center of Quality Control and Improvement on Clinical Anesthesia, No. 49, North Garden Street, Haidian District, Beijing 100191, China.
  • 3 Department of Anesthesiology, Peking University Third Hospital, No. 49, North Garden Street, Haidian District, Beijing 100191, China; Beijing Center of Quality Control and Improvement on Clinical Anesthesia, No. 49, North Garden Street, Haidian District, Beijing 100191, China; Anesthesia and Perioperative Medicine Branch of China International Exchange and Promotive Association for Medical and Health Care (CPAM), No. 49, North Garden Street, Haidian District, Beijing 100191, China. Electronic address: zhengqianli@hsc.pku.edu.cn.
  • 4 Department of Anesthesiology, Peking University Third Hospital, No. 49, North Garden Street, Haidian District, Beijing 100191, China; Beijing Center of Quality Control and Improvement on Clinical Anesthesia, No. 49, North Garden Street, Haidian District, Beijing 100191, China; Anesthesia and Perioperative Medicine Branch of China International Exchange and Promotive Association for Medical and Health Care (CPAM), No. 49, North Garden Street, Haidian District, Beijing 100191, China. Electronic address: puthmzk@hsc.pku.edu.cn.
PMID: 38705534 DOI: 10.1016/j.bcp.2024.116261
Abstract

Delayed neurocognitive recovery (dNCR) is a common complication in geriatric surgical patients. The impact of anesthesia and surgery on patients with neurodegenerative diseases, such as Parkinson's disease (PD) or prion disease, has not yet been reported. In this study, we aimed to determine the association between a pre-existing A53T genetic background, which involves a PD-related point mutation, and the development of postoperative dNCR. We observed that partial hepatectomy induced hippocampus-dependent cognitive deficits in 5-month-old A53T transgenic mice, a model of early-stage PD without cognitive deficits, unlike in age-matched wild-type (WT) mice. We respectively examined molecular changes at 6 h, 1 day, and 2 days after partial hepatectomy and observed that cognitive changes were accompanied by weakened angiotensin-(1-7)/Mas receptor [Ang-(1-7)/MasR] axis, increased alpha-synuclein (α-syn) expression and phosphorylation, decreased methylated protein phosphatase-2A (Me-PP2A), and prompted microglia M1 polarization and neuronal Apoptosis in the hippocampus at 1 day after surgery. Nevertheless, no changes in blood-brain barrier (BBB) integrity or plasma α-syn levels in either A53T or WT mice. Furthermore, intranasal administration of selective MasR agonist AVE 0991, reversed the mentioned cognitive deficits in A53T mice, enhanced MasR expression, reduced α-syn accumulation and phosphorylation, and attenuated microglia activation and apoptotic response. Our findings suggest that individuals with the A53T genetic background may be more susceptible to developing postoperative dNCR. This susceptibility could be linked to central α-syn accumulation mediated by the weakened Ang-(1-7)/MasR/methyl-PP2A signaling pathway in the hippocampus following surgery, independent of plasma α-syn level and BBB.

Keywords

AVE 0991; Ang-(1–7)/MasR axis; Delayed neurocognitive recovery; Early stage of Parkinson’s disease; Microglial polarization; Neuronal apoptosis.

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