当前位置:首页>南京>JCI封面研究丨南京医科大学郭兴教授团队揭示亨廷顿病全新治疗靶点

JCI封面研究丨南京医科大学郭兴教授团队揭示亨廷顿病全新治疗靶点

  • 2026-06-03 04:03:39
JCI封面研究丨南京医科大学郭兴教授团队揭示亨廷顿病全新治疗靶点

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01

研究导读

亨廷顿病(HD)是一种遗传性神经退行性疾病,其特征为进行性运动功能障碍、认知能力下降和纹状体神经元变性,最终导致死亡。中型多棘神经元(MSNs)尤其易受损伤;然而,其病理生理机制仍不明确,目前尚无被证实可延缓疾病进展的治疗方案。

The Journal of Clinical Investigation(JCI)第136卷第9期封面研究文章刊载了南京医科大学郭兴教授研究团队的研究成果。该研究采用全面且创新性的方法,探讨了亨廷顿病中线粒体功能障碍与神经退行性变之间的关系。作者发现,线粒体酶丝氨酸羟甲基转移酶2(SHMT2)表达下调可导致同型半胱氨酸蓄积,进而抑制组蛋白乳酸化,并引发转录失调与神经退行性变。

02

论文信息

论文标题

SHMT2 deficiency disrupts transcriptional regulation through homocysteine-mediated suppression of histone lactylation in Huntington’s Disease models

SHMT2缺乏通过同型半胱氨酸介导的组蛋白乳酸化抑制作用,在亨廷顿病模型中破坏转录调控

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https://doi.org/10.1172/JCI196094

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作者与机构

Mingqin Lu,1 Kexin Li,Shanshan Wu,2 Zhilong Zheng,1 Xinyue Li,1 Shengda Wang,1 Hanwen Yu,2 Chunyue Liu,1 Yueqing Jiang,1 Xueqin Song,3 Yan Liu,4 and Xing Guo5

  1. 南京医科大学基础医学院神经生物学系,江苏南京

  2. 南京医科大学生殖医学与子代健康全国重点实验室,江苏南京

  3. 南京医科大学药学院干细胞与神经再生研究所,江苏南京

  4. 河北医科大学临床神经病学教育部重点实验室,河北省石家庄

  5. 河北医科大学第二医院神经内科,河北省神经病学重点实验室,河北石家庄

  6. 南京医科大学江苏省代谢性疾病分子靶标与干预重点实验室,江苏南京

03

论文解读

摘要图片

利用多组学分析,研究团队首次揭示了在模拟亨廷顿病(HD)的小鼠细胞系中存在的代谢改变。尤其值得注意的是,这些细胞表现出线粒体一碳(1C)代谢失调,且丝氨酸羟甲基转移酶2(SHMT2)的水平降低。

在小鼠培养神经元及诱导多能干细胞(iPSC)来源的人纹状体类器官中,SHMT2的缺失诱导了神经退行性变。类似地,Shmt2的缺失也在小鼠体内诱导了神经退行性变。与之一致的是,SHMT2的过表达在小鼠和患者iPSC来源的纹状体类器官中均能改善神经退行性变。

敲低和过表达实验也揭示了同型半胱氨酸水平的改变,这表明SHMT2的缺失会导致同型半胱氨酸蓄积。尽管同型半胱氨酸与神经毒性相关,且在HD患者中发现其水平升高,但细胞内同型半胱氨酸蓄积的具体效应此前尚不明确。在此,研究团队用同型半胱氨酸处理原代中型多棘神经元,结果导致neurite复杂性降低和神经元兴奋性受损。

图5:SHMT2缺失通过同型半胱氨酸蓄积驱动神经退行性变。

从机制上讲,同型半胱氨酸抑制了组蛋白乳酸化。组蛋白乳酸化是一种被称为“代谢-表观遗传桥梁”的翻译后修饰,能够调控基因表达。具体而言,同型半胱氨酸通过结合乳酸结合蛋白AARS1并干扰乳酸化过程来发挥其作用。

在阐明了SHMT2/同型半胱氨酸(HCY)/乳酸化轴之后,作者评估了常用于治疗HD症状的药物是否能调节该通路。值得注意的是,第一代抗精神病药物氟哌啶醇(haloperidol)能够上调SHMT2的表达并缓解代谢-表观遗传失调,但不包括利培酮(risperidone)、金刚烷胺(amantadine)、帕罗西汀(paroxetine)或多奈哌齐(donepezil)等其他药物。

图7:氟哌啶醇通过依赖SHMT2的机制缓解代谢-表观遗传失调

这些发现揭示了一条由HD中SHMT2缺失所驱动的代谢-表观遗传通路,并突显了SHMT2作为HD潜在治疗靶点的价值。这项研究不仅代表了理解HD的一大显著进展,而且对其他神经退行性疾病也具有广泛的启示意义。

04

作者评论

通过整合多组学分析,我们在人源HD纹状体类器官及YAC128小鼠模型中发现,一碳代谢关键酶SHMT2缺失导致有毒代谢物HCY蓄积;HCY竞争性抑制AARS1的乳酸转移酶活性,降低组蛋白乳酸化水平并引起转录失调,最终导致MSN丢失及运动功能障碍。过表达SHMT2可恢复组蛋白乳酸化,挽救MSN退化并改善运动表型。

我们的研究首次揭示了SHMT2–HCY–组蛋白乳酸化这一代谢-表观遗传调控轴在HD中的致病机制。进一步发现,临床症状管理药物氟哌啶醇可通过调控该轴,部分改善HD相关的代谢与表观遗传紊乱。这些结果提示,SHMT2–HCY–组蛋白乳酸化轴具有作为HD潜在治疗靶点的可能性,并为HD乃至其他神经退行性疾病的防治提供了新的思路。

05

幕后故事

郭兴教授(通讯作者,左)与陆明琴(第一作者,右)在南京医科大学基础医学院仪器平台分析和处理荧光图像。

陆明琴(第一作者,左)与李可欣(共同第一作者,右)在南京医科大学生殖医学与子代健康全国重点实验室基础医学仪器平台使用蔡司 LSM 700 共聚焦显微镜拍摄荧光图像。

06

作者简介

郭兴

郭兴教授目前任南京医科大学神经生物学系主任,博士生导师,国家优秀青年科学基金获得者,江苏省“333工程”第二层次培养对象,江苏省特聘教授。主要研究方向:神经退行性疾病的分子机制与靶向治疗。相关研究成果发表在Neuron,PNAS,Journal of Clinical Investigation,EMBO molecular medicine,Cell Stem Cell等国际期刊。

关于 JCI

影响因子(2024):

13.6

接受率(2025):

 9.6%

期刊引文指标:

3.18

JCR分区:

医学:研究与实验分区

Q1区

2025中国科学院分区/

2026新锐分区:

医学1区Top

JCI是发表基础与临床生物医学研究发现、推动医学实践进步的高影响力期刊,创刊于1924年,由美国临床研究学会(ASCI)出版。ASCI是成立于1908年的非营利性医师科学家荣誉组织。

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免责声明

本文仅为对该研究文献内容的摘抄,如需了解更多信息请查看原文。研究文献中的内容和观点均属于作者,我们不对上述观点和言论承担责任。本文不能作为对所涉疾病、药品或治疗方法等的参考,如有相关问题,请咨询有关有资质的机构。

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  1. CONNECT:[ UseTime:0.001012s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001692s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000716s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000741s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001701s ]
  6. SELECT * FROM `set` [ RunTime:0.000665s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.002077s ]
  8. SELECT * FROM `article` WHERE `id` = 561801 LIMIT 1 [ RunTime:0.001460s ]
  9. UPDATE `article` SET `lasttime` = 1780635327 WHERE `id` = 561801 [ RunTime:0.002137s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000745s ]
  11. SELECT * FROM `article` WHERE `id` < 561801 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001277s ]
  12. SELECT * FROM `article` WHERE `id` > 561801 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001163s ]
  13. SELECT * FROM `article` WHERE `id` < 561801 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002039s ]
  14. SELECT * FROM `article` WHERE `id` < 561801 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002066s ]
  15. SELECT * FROM `article` WHERE `id` < 561801 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002888s ]
0.118033s