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IF4.8!恭喜南昌大学陈莉团队“国自然热点”拿下国产顶刊《Cellular Oncology》!TGF-β/LBH/Mortalin 轴可复现!

  • 2026-06-02 16:50:13
IF4.8!恭喜南昌大学陈莉团队“国自然热点”拿下国产顶刊《Cellular Oncology》!TGF-β/LBH/Mortalin 轴可复现!

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引言

🔍 在肝癌的临床诊疗领域,肝癌恶性程度高、复发转移率强、五年生存率仅21%左右,是全球癌症致死的主要元凶之一。目前靶向、免疫治疗虽有一定突破,但肝癌高度异质性、核心致病机制不明确,新型治疗靶点稀缺,一直是制约肝癌精准治疗和临床预后提升的核心难题!

✅2026年5月,南昌大学陈莉教授团队《Cellular Oncology》(IF=4.8)发表最新研究,系统阐明了TGF-β/LBH/Mortalin全新促肝癌调控轴,证实LBH可通过结合致癌蛋白Mortalin加速肝癌进展,填补了LBH在肝癌中功能及分子机制的研究空白,为肝癌靶向治疗提供了全新的靶点和干预思路

文献解读

中文标题:肢芽和心脏(LBH)的上调通过与致癌蛋白Mortalin相互作用,推动肝癌进展

发表期刊:Cellular Oncology

发表时间:2026年5月

影响因子:4.8/Q2

研究背景

LBH是一种保守的转录辅助因子,在肝癌中异常高表达并驱动恶性增殖与侵袭转移;其通过结合致癌蛋白Mortalin介导促癌表型,构成TGF-β/LBH/Mortalin调控轴,为当前缺乏精准靶点的肝癌提供了极具潜力的靶向干预新方向。

研究方法

生信筛 + 细胞稳转:

  • TCGA/CLCA 挖 LBH、Mortalin 表达和生存;

  • 在 HCC 细胞里稳转 LBH、Mortalin、Smad2/3,搭好体外模型。

体内成瘤 + 上游机制:

  • 裸鼠皮下 + 高压尾静脉自发肝癌,看 LBH/Mortalin 促瘤作用;

  • TGF‑β1 处理 + SB431542 阻断,ChIP‑qPCR 验 Smad2/3 结合 LBH 启动子。

蛋白互作 + 表型功能:

  • GST‑pulldown + Co‑IP/IF 做实锤 LBH‑Mortalin 互作;

  • CCK‑8、Transwell、IHC 上表型,t‑test/ANOVA/生存分析一把算清。

研究结果

一、LBH 在 HCC 中高表达并促进体内外肿瘤生长

TCGA 和 CLCA 显示 LBH 在肝癌组织显著上调,高表达趋势关联更差生存;LBH‑OE 促进裸鼠成瘤体积/重量及 Ki67 增殖指数,体外 LBH‑OE ↑ 增殖,shLBH ↓ 增殖/迁移/侵袭。

图1. LBH与肝细胞癌进展相关,并可促进肝细胞癌的生长

复现建议:

  1. 自己课题可先在 GEO/TCGA 做差异 + 生存初筛锁定目标基因

  2. 成瘤实验建议同步做 Ki67/凋亡双染,能更好解释"长大是因为增殖还是抗凋亡"

二、LBH 促进 HCC 细胞增殖、迁移和侵袭(体外功能)

明确LBH的促癌功能。团队通过shRNA敲低、慢病毒过表达双向调控肝癌细胞中LBH的表达,CCK8实验结果显示,敲低LBH会显著抑制肝癌细胞增殖能力,过表达LBH则会明显促进细胞增殖。

shLBH 明显削弱 HCCLM3/HLE 的 CCK‑8 增殖曲线及 Transwell 迁移/侵袭数;LBH‑OE 反之。功能缺失+功能获得双向印证 LBH 是肝癌促恶性因子。

图2.LBH可在体外促进肝癌细胞的增殖与侵袭

复现建议:

复现时可增加更多肝癌细胞系、加入正常肝细胞作为对照,提升实验说服力;课题研究中可通用这种“双向功能验证”思路,针对目标基因同时做过表达和敲低实验,正反结果相互印证,让实验结论更扎实,是基础机制研究的通用优质范式。

三、TGF‑β1 通过 Smad2/3 转录上调 LBH

TGF‑β1 时间依赖诱导 LBH mRNA;TβRI 抑制剂 SB431542 下调 LBH;Smad2/3 单敲减弱 TGF‑β 诱导的 LBH 上调;ChIP‑qPCR 证实 Smad2/3 结合 LBH 启动子。

RNA‑seq 线索→药理学抑制→靶点敲低→ChIP 四步递进,是验证"某因子是某通路直接靶基因"的范本。

图3.转化生长因子-β可在肝癌细胞中上调LBH的转录水平

复现建议:

这里非常推荐大家学他们这套“生信筛差异 → 通路干预 + ChIP 锁定 → 启动子截短双荧光素酶”的组合拳,在做基因上游转录调控时特别实用。

四、LBH 介导 TGF‑β 促癌作用;LBH 与 TGF‑β 成员表达正相关

明确了LBH是TGF-β通路发挥促癌功能的关键下游介质。体外功能实验显示,TGF-β1处理可显著增强肝癌细胞增殖、迁移、侵袭能力,而敲低LBH后,TGF-β的促癌效应被明显逆转。CLCA 中 LBH 与 TGFB1/2/3、TGFBR1/2 正相关;TCGA 中 TGFB1high/LBHhigh 患者 OS 最差。说明 LBH 是 TGF‑β 促癌功能的下游介质。

图4.下调LBH可在体外抑制由转化生长因子-β(TGF-β)介导的促肿瘤作用

复现建议:

复现时可增加通路下游关键蛋白的免疫印迹检测,完善分子机制证据;课题中探究某通路的下游效应基因时,可优先使用这种“通路激活+基因沉默回复”的实验思路,能直观证明基因的中介调控作用。

五、LBH 与癌蛋白 Mortalin(HSPA9)物理互作并胞质共定位

挖掘了LBH发挥促癌作用的下游互作蛋白。团队通过GST-pulldown联合质谱分析,首次筛选出Mortalin(HSPA9)是LBH的新型互作蛋白。GST‑pull down 及 Co‑IP 确认复合物形成;IF 显示 LBH 核/质分布,Mortalin 主要胞质,两蛋白在胞质共定位

图5.LBH蛋白与热休克蛋白Mortalin发生相互作用

复现建议:

  1. 你做 IP‑MS 筛互作蛋白时,一定设 GST 空载负对照排除珠子非特异结合

  2. IF 共定位建议加 Pearson's R 定量,比主观判断更有说服力

六、LBH 经 Mortalin 发挥促癌功能;Mortalin 本身在 HCC 高表达且预后差

完成了LBH-Mortalin轴的功能闭环验证。TCGA数据库分析显示,Mortalin在肝癌中高表达,且高表达提示患者无进展生存期更差,具备致癌属性HTVi自发肝癌模型显示,LBH和Mortalin均可促进小鼠肝癌生长,提升肿瘤增殖和血管新生水平。

体外挽救实验证实,敲低Mortalin可显著逆转LBH过表达介导的肝癌细胞迁移、侵袭增强表型,回补Mortalin后可恢复促癌效果,从体内外双重层面证明Mortalin是LBH发挥促癌作用的必需下游分子

图6.LBH通过线粒体热休克蛋白75增强肝癌细胞的增殖与侵袭能力

复现建议:

复现可筛选下游通路蛋白,完善完整调控轴机制;课题中验证两个蛋白的上下游功能关系时,必须开展挽救实验,这是证明分子调控因果关系的核心标准,可直接借鉴用于各类分子机制研究。

文章小结

该研究阐明了肝癌恶性进展的全新分子机制,解释了TGF-β通路促癌的下游效应机制,为肝癌精准靶向治疗提供了LBH、Mortalin两个全新的潜在靶点,也为肝癌机制研究提供了新的研究方向。

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  1. CONNECT:[ UseTime:0.000640s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000867s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000303s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000282s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000561s ]
  6. SELECT * FROM `set` [ RunTime:0.000196s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000577s ]
  8. SELECT * FROM `article` WHERE `id` = 520960 LIMIT 1 [ RunTime:0.000511s ]
  9. UPDATE `article` SET `lasttime` = 1780483476 WHERE `id` = 520960 [ RunTime:0.009685s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000362s ]
  11. SELECT * FROM `article` WHERE `id` < 520960 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000570s ]
  12. SELECT * FROM `article` WHERE `id` > 520960 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000460s ]
  13. SELECT * FROM `article` WHERE `id` < 520960 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000817s ]
  14. SELECT * FROM `article` WHERE `id` < 520960 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009553s ]
  15. SELECT * FROM `article` WHERE `id` < 520960 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.052213s ]
0.149583s