当前位置:首页>南京>南京医科大学博士生直接拿下《Nature》子刊!发现乳酸通过KU70乳酰化促进胶质瘤免疫逃逸

南京医科大学博士生直接拿下《Nature》子刊!发现乳酸通过KU70乳酰化促进胶质瘤免疫逃逸

  • 2026-07-05 07:25:41
南京医科大学博士生直接拿下《Nature》子刊!发现乳酸通过KU70乳酰化促进胶质瘤免疫逃逸

标题:抑制巨噬细胞来源乳酸转运恢复cGAS-STING信号,增强胶质母细胞瘤中的抗肿瘤免疫

英文标题:Inhibiting macrophage-derived lactate transport restores cGAS-STING signalling and enhances antitumour immunity in glioblastoma

研究背景:

胶质母细胞瘤(GBM)是恶性程度最高的原发性脑肿瘤,预后极差:患者平均生存期仅 14~16 个月,5 年生存率不足 5%。GBM 肿瘤微环境(TME)高度复杂,以 胶质母细胞瘤干细胞 (GSCs)和肿瘤相关巨噬细胞 (TAMs)为核心,存在代谢重编程与免疫抑制两大特征,也是现有放化疗、免疫治疗效果不佳的关键原因。

核心问题

TAMs 分泌的乳酸如何在 GSCs 中发挥作用?通过哪些分子通路调控肿瘤增殖、DNA 修复与免疫逃逸?能否靶向该代谢通路提升免疫治疗效果?

研究思路

作者整合单细胞 RNA 测序、空间转录组、代谢同位素示踪、蛋白质组 / 修饰组、基因敲除 / 敲除小鼠、原位肿瘤模型等多技术体系,从人群样本→细胞→动物层层递进,阐明了TAMs 代谢如何调控 GSCs 干性(长期悬而未决的肿瘤干细胞 - 免疫细胞互作问题);解释了 GBM 中 DNA 修复异常与免疫抑制为何同步发生;揭示乳酸乳酰化不依赖 GPR81 受体,开辟乳酸非受体型作用新方向,证据链完整、可信度高。

集思慧远深耕科研数据分析领域,可提供数据深度挖掘、高分文献思路复现等方面的交流与支持。若您有相关需求或想法,欢迎关注沟通,期待与您携手攻克科研难题,产出高质量研究成果。

研究结果

发现1:证实 TAMs 通过 MCT4-MCT1 向 GSCs 转运乳酸

单细胞测序验证对多套 GBM 单细胞数据集分析发现:糖酵解、乳酸转运特征在TAMs 和 GSCs中显著富集;SLC16A3 特异性高表达于 TAMs,SLC16A1 特异性高表达于 GSCs,二者空间分布分别与 TAMs 标志物 CD163、GSCs 标志物 SOX2 共定位。敲低 TAMs 的 MCT4,其上清液乳酸含量下降约 70%,GSCs 摄取的乳酸显著减少;敲低 GSCs 的 MCT1,GSCs 摄取 TAMs 来源的乳酸能力大幅下降;同位素示踪证实:GSCs 中约 55% 的乳酸直接来自 TAMs。体内动物验证构建髓系细胞特异性 MCT4 敲除小鼠,颅内接种胶质瘤细胞后:肿瘤内乳酸含量下降、肿瘤生长受抑,小鼠生存期显著延长。临床相关性MCT1、MCT4 高表达与 GBM 患者不良预后显著相关。

发现2:TAMs 来源的乳酸通过乳酰化促进 GSCs 增殖与干性维持

乳酸特异性促增殖外源乳酸可剂量依赖性促进 GSCs 增殖,而同为 MCT1 转运的丙酮酸、乙酸无此作用;MCT1 敲低可完全阻断乳酸的促增殖效应。

乳酸上调 GSCs 整体乳酰化水平TAMs 上清、外源乳酸均会提升 GSCs 蛋白乳酰化;敲低 MCT1/MCT4 后,乳酰化水平显著回落。

GSC整体乳酰化水平高于正常神经干细胞,受MCT1-MCT4调控。质谱鉴定出KU70 K317位点在GSC中高度乳酰化。MCT1敲低减少该位点乳酰化,K317R突变(模拟非乳酰化)抑制GSC增殖和成球能力,体内仅部分恢复肿瘤生长

发现3:KU70 K317 乳酰化抑制 cGAS–STING 通路,构建免疫抑制微环境

乳酸介导的 KU70 乳酰化通过抑制 cGAS–STING 通路,减少干扰素分泌、抑制 CD8⁺ T 细胞功能,最终形成 GBM 免疫抑制微环境。

发现4:靶向乳酸转运 / KU70 乳酰化联合免疫检查点抑制剂(PD-1 抗体)的治疗效果

研究开展临床前联合治疗验证,分为两大靶向方向:

方向 1:靶向乳酸转运蛋白(MCT1/MCT4)

使用抑制剂Syrosingopine(同时抑制 MCT1、MCT4):

单药:抑制肿瘤生长、增加 DNA 损伤、提升 CD8⁺ T 细胞活性;

联合 PD-1 抗体:协同增效,肿瘤体积大幅缩小,CD8⁺ T 细胞浸润、颗粒酶 B 表达显著上调,小鼠生存期远优于单药组。

方向 2:靶向 KU70 K317 乳酰化

设计细胞穿透肽 KU70 K317-Pe(特异性阻断该位点乳酰化):

单药即可抑制肿瘤、延长生存期;

与 PD-1 抗体联用,同样展现显著协同抗肿瘤作用。

核心结论

肿瘤相关巨噬细胞通过 MCT4 分泌乳酸,经 GSCs 表面 MCT1 摄取后,诱导 DNA 修复蛋白 KU70 发生 K317 位点乳酰化,一方面增强 DNA 非同源末端连接通路、维持胶质母细胞瘤干细胞增殖与干性,另一方面抑制 cGAS–STING 天然免疫通路、塑造免疫抑制微环境;靶向 MCT1/MCT4 乳酸转运或 KU70 乳酰化,联合 PD-1 免疫检查点抑制剂,可显著提升胶质母细胞瘤的抗肿瘤效果,是极具潜力的新型联合治疗策略。

集思慧远深耕科研数据分析领域,可提供数据深度挖掘、高分文献思路复现等方面的交流与支持。若您有相关需求或想法,欢迎关注沟通,期待与您携手攻克科研难题,产出高质量研究成果。

往期推荐 ·

ATAC+RNA 双组学搭配基序富集、ChIP 验证,完整解析脂肪肝性别差异,高分思路可直接复刻

中南大学湘雅医院11+研究:CUT&Tag+RNA-seq揭秘脊髓损伤亚急性期巨噬细胞乳酸化驱动的神经炎症恶性循环

王学浩院士团队Gut:空间转录组+乳酸化泛素化修饰组揭秘肝癌新机制,虚拟筛选+ZIF-8纳米载体肝靶向递送带来治疗新方案

“失败”靶点如何发顶刊?张泽民院士团队:scRNA-seq锁定关键细胞亚群,泛素化机制打造免疫治疗下一代靶点

注:本文原创表明为原创编译,非声张版权,侵删!

关于集思慧远

集思慧远(GENEPIONEER)致力于将生命科学和化学相结合,助力客户达成科研创新的目标。更多信息请浏览:genepioneer.cn
南京集思慧远生物科技有限公司于2015年4月成立,是一家专业从事科研实验服务的公司。公司总部坐落在具有丰厚历史底蕴的南京,坐标在南京大学旁的江苏生命科技创新园,办公面积2000m²,员工人数100+。集思医学主营业务有:

1.基因/转录/蛋白/代谢/微生物等常规高通量组学及单细胞和空间转录组等时空组学;

2.表观组学WGBS/Ribo-seq/CUT&Tag/ATAC-seq/Hi-c/m6A/m5C/ac4C各类修饰)的表观遗传研究,助力新靶点发现、药物作用机制研究及疾病表观调控机制探索

3.蛋白修饰:磷酸化、乙酰化、泛素化、乳酸化、组蛋白甲基化等修饰

4.专业的医学方案整体设计利用生物信息学对公共数据进行深入挖掘分析,并提供干湿结合实验

5.新靶点发现及验证服务,通过ABPP/TPP/DARTS等技术加速小分子药物靶点发现

6.难成药靶点降解剂开发技术PROTAC

7.基于AI的药物筛选/设计/优化/抑制剂开发等;

8.无需抗体的临近标记PLA技术提供蛋白互作研究。

9.纳米材料递送药物系统开发,定制化纳米载体设计与制备,解决药物靶向递送至病灶组织/细胞等药物递送难题。

集思的荣誉及成果:2017获国家高新技术企业,2020众创板挂牌,2021获江苏省民营科技企业称号。2024荣膺江苏省“专精特新”中小企业、栖霞高新区TOP20明星企业称号。创始人先后获“创业南京”人才计划二等奖,“中国江苏创新创业大赛”优胜奖,“南京市创新型企业家”称号等。集思的愿景:打造生命科学行业的航空母舰,为人类生命健康保驾护航,为人类生产生活谋福祉。

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  1. CONNECT:[ UseTime:0.000521s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000805s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000304s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000237s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000456s ]
  6. SELECT * FROM `set` [ RunTime:0.000191s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000489s ]
  8. SELECT * FROM `article` WHERE `id` = 581794 LIMIT 1 [ RunTime:0.000412s ]
  9. UPDATE `article` SET `lasttime` = 1783298608 WHERE `id` = 581794 [ RunTime:0.009800s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000259s ]
  11. SELECT * FROM `article` WHERE `id` < 581794 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000501s ]
  12. SELECT * FROM `article` WHERE `id` > 581794 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001670s ]
  13. SELECT * FROM `article` WHERE `id` < 581794 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000673s ]
  14. SELECT * FROM `article` WHERE `id` < 581794 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000650s ]
  15. SELECT * FROM `article` WHERE `id` < 581794 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001004s ]
0.084449s