中国神经再生研究(英文版) ›› 2026, Vol. 21 ›› Issue (3): 1211-1221.doi: 10.4103/NRR.NRR-D-24-00702

• 原著:退行性病与再生 • 上一篇    下一篇

工程化益生菌乳链球菌MG1363-pMG36e-GLP-1调节转基因帕金森病模型小鼠小胶质细胞极化和肠道菌群失调

  

  • 出版日期:2026-03-15 发布日期:2025-07-05

The engineered probiotic strain Lactococcus lactis MG1363-pMG36e-GLP-1 regulates microglial polarization and gut dysbiosis in a transgenic mouse model of Parkinson’s disease

Mengyun Yue1, *, #, Tingtao Chen2, *, #, Wenjie Chen2, 3, Jing Wei2 , Bin Liao1 , Jie Zhang1 , Fangjun Li1 , Daojun Hong1 , Xin Fang1, *   

  1. 1 Department of Neurology, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi Province, China;  2 National Engineering Research Center of Bioengineering Drugs and Technologies, Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi Province, China;  3 Queen Mary School, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi Province, China
  • Online:2026-03-15 Published:2025-07-05
  • Contact: Xin Fang, MD, fangx2011@163.com; Tingtao Chen, PhD, chentingtao1984@163.com; Mengyun Yue, MS, yuemengyun1996@163.com.
  • Supported by:
    This study was supported by grants from the Jiangxi Provincial Natural Science Foundation, No. 20242BAB26134 (to XF); the National Natural Science Foundation of China, Nos. 82060638 (to TC), 82060222 (to XF), 82460237 (to XF); the Major Disciplines of Academic and Technical Leaders Project of Jiangxi Province, Nos. 20194BCJ22032 (to TC), 20213BCJL22049 (to XF); and Science and Technology Plan of Jiangxi Health Planning Committee, No. 202210390 (to XF).

摘要:

帕金森病的特征是与突触核病变相关的神经变性。既往研究表明,胰高血糖素肽1对1-甲基-4-苯基-1,2,3,6-四氢吡啶诱导的帕金森病模型小鼠具有积极作用。然而,胰高血糖素肽1在突触核蛋白自身功能障碍中的作用尚不清楚。为此,实验探索了乳链球菌MG1363-pMG36e-GLP-1(L. lactis-GLP-1)对SncaA53T转基因帕金森病小鼠的改善作用及机制。结果显示,L. lactis-GLP-1可抑制转基因小鼠中多巴胺能神经元的死亡、α-Syn的病理凝集,并改善其运动功能。同时,L. lactis-GLP-1还能通过下调脂多糖相关炎症,减少小胶质细胞和星形胶质细胞的脑激活以及促进黑质细胞存活胰高血糖素肽1受体/PI3K/Akt通路,进而表现出抗帕金森病作用。此外,L. lactis-GLP-1还下调了血清促炎分子脂多糖、脂多糖相关蛋白、白细胞介素1β和白细胞介素6水平。最后,肠道组织病理学和蛋白质印迹结果进一步表明,L. lactis-GLP-1可通过逆转SncaA53T转基因小鼠肠道菌群失调来改善肠道完整性蛋白并减少炎症反应。结果结果表明,L. lactis-GLP-1对SncaA53T转基因帕金森病小鼠的积极作用是通过介导小胶质细胞极化和逆转肠道菌群失调实现的。因而,L. lactis-GLP-1可能成为一种潜在的帕金森病的治疗药物。

https://orcid.org/0000-0001-7768-3127 (Xin Fang); https://orcid.org/0000-0002-0506-8536 (Tingtao Chen);

https://orcid.org/0000-0003-1221-3727 (Mengyun Yue); https://orcid.org/0000-0002-0078-3805 (Wenjie Chen); https://orcid.org/0000-0003-1380-3534 (Daojun Hong)

关键词: 帕金森病, 神经退行性疾病, 胰高血糖素样肽1, 乳酸乳球菌MG1363-pMG36e-GLP-1, 工程益生菌, 转基因小鼠, 神经炎症, 小胶质细胞极化, 肠道菌群失调, 肠脑轴

Abstract: Parkinson’s disease is characterized by synucleinopathy-associated neurodegeneration. Previous studies have shown that glucagon-like peptide-1 (GLP-1) has beneficial effects in a mouse model of Parkinson’s disease induced by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine. However, the effect of GLP-1 on intrinsic synuclein malfunction remains unclear. In this study, we investigated the effect of Lactococcus lactis MG1363-pMG36e-GLP-1 on parkinsonism in SncaA53T transgenic mice and explored the underlying mechanisms. Our data showed that Lactococcus lactis MG1363-pMG36e-GLP-1 inhibited dopaminergic neuronal death, reduced pathological aggregation of α-synuclein, and decreased movement disorders in SncaA53T transgenic mice. Furthermore, Lactococcus lactis MG1363-pMG36e-GLP-1 downregulated lipopolysaccharide-related inflammation, reduced cerebral activation of microglia and astrocytes, and promoted cell survival via the GLP-1 receptor/PI3K/Akt pathway in the substantia nigra. Additionally, Lactococcus lactis MG1363-pMG36e-GLP-1 decreased serum levels of pro-inflammatory molecules including lipopolysaccharide, lipopolysaccharide binding protein, interleukin-1β, and interleukin-6. Gut histopathology and western blotting further revealed that Lactococcus lactis MG1363-pMG36e-GLP-1 increased the expression of gut integrity–related proteins and reduced lipopolysaccharide-related inflammation by reversing gut dysbiosis in SncaA53T transgenic mice. Our findings showed that the beneficial effect of Lactococcus lactis MG1363-pMG36e-GLP-1 on parkinsonism traits in SncaA53T transgenic mice is mediated by microglial polarization and the reversal of dysbiosis. Collectively, our findings suggest that Lactococcus lactis MG1363-pMG36e-GLP-1 is a promising therapeutic agent for the treatment of Parkinson’s disease.

Key words: A53T transgenic mice, engineered probiotics, glucagon-like peptide-1, gut dysbacteriosis, gut-brain axis, Lactococcus lactis MG1363-pMG36eGLP-1, microglial polarization, neurodegenerative disease, neuroinflammation, Parkinson’s disease