当前位置:首页>郑州>Adv sci:郑州大学张鹏团队发现肺腺癌“自毁开关”制动器:THUMPD1缺失会触发铜离子风暴与线粒体过度“自噬”,驱动肿瘤生长

Adv sci:郑州大学张鹏团队发现肺腺癌“自毁开关”制动器:THUMPD1缺失会触发铜离子风暴与线粒体过度“自噬”,驱动肿瘤生长

  • 2026-06-18 06:11:21
Adv sci:郑州大学张鹏团队发现肺腺癌“自毁开关”制动器:THUMPD1缺失会触发铜离子风暴与线粒体过度“自噬”,驱动肿瘤生长

iNature

肺腺癌(LUAD)仍是导致癌症相关死亡的主要原因之一。N4-乙酰胞苷(ac4C)修饰调控mRNA的稳定性和翻译,但其相关辅因子THUMP结构域蛋白1(THUMPD1)在癌症中的作用尚不清楚。

2026年5月4日,郑州大学张鹏唯一通讯Advanced science(IF=14.1)线发表“Cuproptosis and Mitophagy Mediated by the THUMPD1/IGF2R-Dependent Suppression of AKT and Activation of AMPK Signaling Suppress Lung Adenocarcinoma Progression的研究论文临床LUAD样本和基因表达综合数据集(GEO)分析THUMPD1表达和预后。通过体内外功能实验探究THUMPD1对肺腺癌的生物学作用;借助多组学策略与机制研究筛选其下游靶点及信号通路
研究结果显示:THUMPD1在晚期肺腺癌中显著下调。THUMPD1发挥抑癌基因功能,可在小鼠模型中抑制肺腺癌细胞增殖、转移及肿瘤生长。机制研究表明:THUMPD1可直接结合胰岛素样生长因子2受体(IGF2R)的mRNA,以不依赖ac4C的方式通过促进该mRNA的胞质定位,上调其翻译水平。THUMPD1-IGF2R信号轴可抑制AKT信号通路,进而激活AMPK通路;导致细胞内铜离子蓄积,诱发铜死亡与过度线粒体自噬,最终抑制肿瘤生长。治疗层面,铜离子载体依来司莫(elesclomol)可显著抑制THUMPD1敲除肺腺癌小鼠模型的肿瘤生长。
肺腺癌(LUAD)是非小细胞肺癌中最常见的组织学亚型,也是全球癌症相关死亡率的主要原因。根据美国联合癌症委员会(AJCC)定义的肿瘤-结点转移(TNM)分期系统,LUAD的预后与诊断时的疾病分期密切相关。早期肿瘤(I-II期)通常适合治愈性手术切除,而晚期疾病(III-IV期)淋巴结转移或远处器官受累则预后显著较差。尽管靶向和免疫疗法取得了进步,晚期或转移性疾病的预后仍然较差,凸显了识别新型预后生物标志物和阐明驱动LUAD发病机制的必要性。
N4-乙酰胞苷(ac4C)是一种进化上保守的RNA修饰方式。N-乙酰转移酶10(NAT10)是目前已知唯一的ac4C“写入蛋白”,可通过对胞苷残基进行乙酰化催化ac4C修饰生成,改变RNA的化学结构与理化性质,进而调控靶mRNA的稳定性与翻译效率。因此,NAT100介导的ac4C修饰主要参与转录后调控,而非直接的转录调控。迄今为止,大量研究证实NAT10及其介导的ac4C修饰在多种恶性肿瘤中异常高表达,可促进肿瘤细胞增殖、转移、耐药及免疫逃逸。综上现有研究普遍认为NAT10/ac4C在肿瘤中主要发挥促癌作用,但ac4C修饰重塑的功能效应仍可能依赖细胞背景与下游靶分子。
含THUMP结构域蛋白1(THUMPD1)是NAT10在tRNA的ac4C修饰建立过程中不可或缺的激活因子与辅助因子。但THUMPD1是否参与mRNA上的ac4C修饰目前仍存在争议。由于mRNA中ac4C本底丰度较低,且检测技术仍在不断发展,THUMPD1在mRNA乙酰化修饰中的作用尚无定论,仍需进一步深入研究。除分子调控功能外,THUMPD1还具有重要生理作用。人类THUMPD1双等位基因变异会导致tRNA乙酰化功能缺失,引发综合征性智力障碍。小鼠研究发现,Thumpd1基因缺陷可造成个体体型偏小、生殖不育,但成年敲除小鼠仍可存活;而同时敲除Thumpd1与应激感应激酶Gcn2会导致小鼠出生后高致死率,说明THUMPD1在个体生长、生殖适应及细胞应激调控中发挥重要作用。
相较于NAT10,THUMPD1在肿瘤领域的研究仍十分有限。现有少量证据提示THUMPD1的功能具有细胞背景依赖性。这种功能异质性可能源于THUMPD1与NAT10的结合并非组成性存在,而是具有底物特异性和细胞背景特异性。事实上,THUMPD1是否在所有表达NAT10的生物学场景中均发挥必需作用,还是仅局限于特定RNA底物与细胞微环境,目前尚未完全阐明;同样,肿瘤中THUMPD1与NAT10是否存在一致性共表达,也尚无明确结论。
 LUAD中THUMPD1/IGF2R信号轴介导的肿瘤抑制机制的示意模型(图源自Advanced science 
在肺腺癌研究领域,THUMPD1是否调控mRNA的ac4C修饰、以及是否存在非经典ac4C依赖的生物学功能,目前仍不清楚。本研究首先证实THUMPD1在晚期肺腺癌中表达下调,并进一步探究其在mRNAac4C修饰与翻译调控中的作用。研究结果表明,THUMPD1还可通过不依赖ac4C的机制,调控肿瘤核心恶性表型及新型细胞死亡通路。
原文链接:

https://doi.org/10.1002/advs.202521238

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  1. CONNECT:[ UseTime:0.000462s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000770s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000265s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000282s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000559s ]
  6. SELECT * FROM `set` [ RunTime:0.000235s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000603s ]
  8. SELECT * FROM `article` WHERE `id` = 537324 LIMIT 1 [ RunTime:0.001835s ]
  9. UPDATE `article` SET `lasttime` = 1781930790 WHERE `id` = 537324 [ RunTime:0.001537s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000243s ]
  11. SELECT * FROM `article` WHERE `id` < 537324 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000441s ]
  12. SELECT * FROM `article` WHERE `id` > 537324 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000570s ]
  13. SELECT * FROM `article` WHERE `id` < 537324 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000877s ]
  14. SELECT * FROM `article` WHERE `id` < 537324 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002425s ]
  15. SELECT * FROM `article` WHERE `id` < 537324 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005410s ]
0.083064s