当前位置:首页>南京>9.6/Q1,郑州大学和南京医科大学联合突破!scRNA-seq+TCGA数据库锁定HCC新靶点:PSMD1-RTKN轴破解免疫治疗耐药,协同抗PD

9.6/Q1,郑州大学和南京医科大学联合突破!scRNA-seq+TCGA数据库锁定HCC新靶点:PSMD1-RTKN轴破解免疫治疗耐药,协同抗PD

  • 2026-03-20 06:01:43
9.6/Q1,郑州大学和南京医科大学联合突破!scRNA-seq+TCGA数据库锁定HCC新靶点:PSMD1-RTKN轴破解免疫治疗耐药,协同抗PD

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中文标题PSMD1抑制通过调节肝细胞癌中的RTKN/β-连环蛋白/PD-L1轴,抑制肿瘤进展并增强抗肿瘤免疫

发表期刊:CDD

发布时间:2026年1月

影响因子:9.6

01

研究背景

Hot

肝细胞癌(HCC)是全球高发恶性肿瘤,免疫治疗应答率低,亟需挖掘新靶点。PSMD1 作为 26S 蛋白酶体亚基,在多种肿瘤中促癌,但在 HCC 中的功能及与免疫治疗的关联尚未明确,其调控机制有待深入探究。

02

研究方法

Hot

整合 TCGA、ICGC 公共数据库及 scRNA-seq 数据,通过机器学习筛选关键基因;采用免疫组化、Western blot 验证 PSMD1 在 HCC 组织及细胞系中的表达;借助 CCK-8、菌落形成、EdU、流式凋亡等实验探究其体外功能;利用 Co-IP、质谱分析筛选互作蛋白;通过裸鼠皮下移植瘤、原位瘤模型验证体内功能及与抗 PD-1 治疗的协同作用。

03

研究结果

Hot

1

PSMD1 在 HCC 中高表达且与不良预后相关

TCGA、ICGC 数据库分析显示,HCC 组织中 PSMD1 mRNA 水平显著高于癌旁组织(图 1F),免疫组化及 Western blot 验证其蛋白高表达(图 1G-K)。高表达 PSMD1 与肿瘤大尺寸、高 TNM 分期、高 Edmondson 分级相关(表 1),且患者总生存期更短(图 1I),TIDE 评分提示免疫治疗应答更差(图 1E)。

2

PSMD1 敲低抑制 HCC 增殖并促进凋亡

在 MHCC-97H、HCC-LM3 细胞中敲低 PSMD1 后,CCK-8、菌落形成及 EdU 实验显示细胞增殖能力显著降低(图 3C-E),流式凋亡实验及 Western blot 证实凋亡率升高,BCL-2 表达下调、BAX 表达上调(图 3H-I、S1K),表明 PSMD1 在 HCC 中具有促癌功能。

3

PSMD1 通过 RTKN/β-catenin 轴调控 PD-L1 表达

scRNA-seq 数据分析显示 PSMD1 与 β-catenin 通路正相关(图 4A),敲低 PSMD1 可降低 β-catenin 蛋白水平及下游靶基因(CyclinD1、c-Myc 等)表达,减少 PD-L1 转录(图 4B-F)。Co-IP 及质谱鉴定 PSMD1 与 RTKN 互作,通过抑制其泛素化稳定 RTKN 蛋白(图 5A-N)。RTKN 可结合 AKT 并促进其磷酸化,进而激活 β-catenin 通路(图 6A-G)。

4

PSMD1 敲低增强抗 PD-1 治疗疗效

裸鼠皮下移植瘤模型中,PSMD1 敲低组肿瘤体积和重量显著减小,Ki67、RTKN、PD-L1 表达降低(图 7A-E)。原位瘤模型显示,PSMD1 敲低与抗 PD-1 治疗联合使用时,肿瘤抑制效果最显著,CD8⁺T 细胞浸润增加(图 8A-F),证实 PSMD1 敲低可增强免疫治疗敏感性。

04

文章小结

Hot

本研究揭示 PSMD1 在 HCC 中高表达,通过稳定 RTKN 蛋白、激活 AKT/β-catenin 通路促进 PD-L1 表达,加速肿瘤进展。敲低 PSMD1 可抑制 HCC 增殖、促进凋亡,并增强抗 PD-1 治疗疗效,PSMD1/RTKN/β-catenin/PD-L1 轴为 HCC 治疗提供新靶点。

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  1. CONNECT:[ UseTime:0.001192s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001503s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000689s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000624s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001596s ]
  6. SELECT * FROM `set` [ RunTime:0.000237s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000658s ]
  8. SELECT * FROM `article` WHERE `id` = 487428 LIMIT 1 [ RunTime:0.000437s ]
  9. UPDATE `article` SET `lasttime` = 1775335183 WHERE `id` = 487428 [ RunTime:0.002135s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000231s ]
  11. SELECT * FROM `article` WHERE `id` < 487428 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000410s ]
  12. SELECT * FROM `article` WHERE `id` > 487428 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000360s ]
  13. SELECT * FROM `article` WHERE `id` < 487428 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000910s ]
  14. SELECT * FROM `article` WHERE `id` < 487428 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000582s ]
  15. SELECT * FROM `article` WHERE `id` < 487428 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000735s ]
0.174265s