中国神经再生研究(英文版) ›› 2024, Vol. 19 ›› Issue (6): 1318-1324.doi: 10.4103/1673-5374.385314

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

神经营养素 BNN-20 对黑质变性小鼠模型神经祖细胞移植后中脑神经发生的促进作用

  

  • 出版日期:2024-06-15 发布日期:2023-11-17

Enhancement of endogenous midbrain neurogenesis by microneurotrophin BNN-20 after neural progenitor grafting in a mouse model of nigral degeneration

Theodora Mourtzi1, *, Nasia Antoniou2, #, Christina Dimitriou1, #, Panagiotis Gkaravelas2, #, Georgia Athanasopoulou2, #br# Panagiota Nti Kostantzo1, Olga Stathi1, Efthymia Theodorou1, Maria Anesti1, Rebecca Matsas2, Fevronia Angelatou3, #br# Georgia Kouroupi2, §, Ilias Kazanis1, *, §#br#   

  1. 1Laboratory of Developmental Biology, Department of Biology, University of Patras, Patras, Greece; 2Laboratory of Cellular and Molecular Neurobiology-Stem Cells, Hellenic Pasteur Institute, Athens, Greece; 3Department of Physiology, School of Medicine, University of Patras, Patras, Greece
  • Online:2024-06-15 Published:2023-11-17
  • Contact: Ilias Kazanis, MSc, PhD, ikazanis@upatras.gr; Theodora Mourtzi, MSc, PhD, mourtzi@upatras.gr.
  • Supported by:
    This study was co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning 2014–2020» in the context of the project “NeuroProPar” (MIS 5047138, to IK).

摘要:

以往的研究结果表明,合成的神经营养素BNN-20在进行性黑质变性模型"小鼠的SNpc中表现出很强的神经保护和促神经源活性。实验从两个与临床相关的方面扩展了以往研究成果。首先,实验评估了 BNN-20 对人类诱导多能干细胞源性神经祖细胞和神经元的影响,这些细胞和神经元分别来自健康和帕金森病供体。其次,实验还评估了 BNN-20 是否能提高处于退化晚期的进行性黑质变性模型weaver小鼠神经祖细胞移植的效果。结果发现,BNN-20 对培养的人类诱导多能干细胞源性神经祖细胞的直接影响有限,可稍微增强其向神经元的分化,并部分逆转帕金森病供体产生的多巴胺能神经元的病理表型。与此相一致,实验发现 BNN-20 对移植到weaver小鼠黑质的神经祖细胞没有影响。然而,该移植明显诱导了整个中脑的内源性神经源反应,而这种反应在微神经营养素 BNN-20干预 后显著增强。实验结果证明了BNN-20 可以特异性地增强中脑的内源性神经源反应,但对培养的人类诱导多能干细胞源性神经祖细胞缺乏类似的活性,说明BNN-20促神经源效应的体内特异性。

https://orcid.org/0000-0003-1035-0584 (Ilias Kazanis); https://orcid.org/0000-0001-5106-8214 (Theodora Mourtzi)

Abstract: We have previously shown the neuroprotective and pro-neurogenic activity of microneurotrophin BNN-20 in the substantia nigra of the “weaver” mouse, a model of progressive nigrostriatal degeneration. Here, we extended our investigation in two clinically-relevant ways. First, we assessed the effects of BNN-20 on human induced pluripotent stem cell-derived neural progenitor cells and neurons derived from healthy and parkinsonian donors. Second, we assessed if BNN-20 can boost the outcome of mouse neural progenitor cell intranigral transplantations in weaver mice, at late stages of degeneration. We found that BNN-20 has limited direct effects on cultured human induced pluripotent stem cell-derived neural progenitor cells, marginally enhancing their differentiation towards neurons and partially reversing the pathological phenotype of dopaminergic neurons generated from parkinsonian donors. In agreement, we found no effects of BNN-20 on the mouse neural progenitor cells grafted in the substantia nigra of weaver mice. However, the graft strongly induced an endogenous neurogenic response throughout the midbrain, which was significantly enhanced by the administration of microneurotrophin BNN-20. Our results provide straightforward evidence of the existence of an endogenous midbrain neurogenic system that can be specifically strengthened by BNN-20. Interestingly, the lack of major similar activity on cultured human induced pluripotent stem cell-derived neural progenitors and their progeny reveals the in vivo specificity of the aforementioned pro-neurogenic effect.

Key words: adult neurogenesis, BNN-20, brain-derived neurotrophic factor, cell replacement, induced pluripotent stem cells (iPSCs), neurotrophic factors, Parkinson’s disease, substantia