在实验性自身免疫性脑脊髓炎(EAE)诱导的脱髓鞘小鼠模型中,减少衰老细胞并不能改善其恢复情况。

Senescent cell reduction does not improve recovery in mice under experimental autoimmune encephalomyelitis (EAE) induced demyelination.

作者信息

Manavi Zeeba, Melchor George S, Bullard Meghan R, Gross Phillip S, Ray Shinjini, Gaur Pankaj, Baydyuk Maryna, Huang Jeffrey K

机构信息

Department of Biology, Georgetown University, Washington, DC, USA.

Interdisciplinary Program in Neuroscience, Georgetown University, Washington, DC, USA.

出版信息

J Neuroinflammation. 2025 Apr 7;22(1):101. doi: 10.1186/s12974-025-03425-3.

Abstract

Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system (CNS) characterized by immune cell-driven demyelination and progressive neurodegeneration. Senescent cells (SCs) have recently been observed in chronic MS lesions indicating their possible involvement in disease progression. However, the role of SCs and the potential therapeutic benefit of their reduction through senolytic therapy remains to be determined in experimental autoimmune encephalomyelitis (EAE), a widely used preclinical model of MS. Here, we show that senescent-like myeloid cells accumulate in the spinal cord parenchyma and meninges in mice after myelin oligodendrocyte glycoprotein (MOG) EAE induction. Treatment with the senolytic cocktail, Dasatinib and Quercetin (DQ), effectively reduces the senescent-like myeloid cells, but this does not translate into improved clinical outcomes in EAE mice. Increasing DQ dosage or using INK-ATTAC transgenic mice also failed to ameliorate EAE severity. Additionally, histopathological analysis shows no significant differences in demyelination or axonal degeneration between treated and control groups. Our findings indicate that senescent-like myeloid cells are present in an immune-mediated demyelinating model of MS and can be reduced through senolytic therapy with Dasatinib and Quercetin. However, their reduction through DQ does not significantly impact inflammation or recovery, suggesting that the therapeutic potential of senolytics as disease-modifying drugs in MS may be limited.

摘要

多发性硬化症(MS)是一种中枢神经系统(CNS)的慢性炎症性疾病,其特征为免疫细胞驱动的脱髓鞘和进行性神经退行性变。最近在慢性MS病变中观察到衰老细胞(SCs),表明它们可能参与疾病进展。然而,在实验性自身免疫性脑脊髓炎(EAE,一种广泛使用的MS临床前模型)中,SCs的作用以及通过衰老细胞溶解疗法减少SCs的潜在治疗益处仍有待确定。在此,我们表明,在髓鞘少突胶质细胞糖蛋白(MOG)诱导EAE后,衰老样髓样细胞在小鼠脊髓实质和脑膜中积累。用衰老细胞溶解鸡尾酒达沙替尼和槲皮素(DQ)治疗可有效减少衰老样髓样细胞,但这并未转化为EAE小鼠临床结果的改善。增加DQ剂量或使用INK-ATTAC转基因小鼠也未能改善EAE的严重程度。此外,组织病理学分析显示治疗组和对照组之间在脱髓鞘或轴突变性方面没有显著差异。我们的研究结果表明,衰老样髓样细胞存在于MS的免疫介导脱髓鞘模型中,并且可以通过达沙替尼和槲皮素的衰老细胞溶解疗法减少。然而,通过DQ减少它们并不会显著影响炎症或恢复,这表明衰老细胞溶解剂作为MS中疾病修饰药物的治疗潜力可能有限。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e522/11974124/4e1be49d3b9b/12974_2025_3425_Fig1_HTML.jpg

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