当前位置:首页>南京>IF10.2!恭喜南京大学附属医院团队用 “单细胞 + 转录组” 直接冲双一区!

IF10.2!恭喜南京大学附属医院团队用 “单细胞 + 转录组” 直接冲双一区!

  • 2026-02-13 21:08:00
IF10.2!恭喜南京大学附属医院团队用 “单细胞 + 转录组” 直接冲双一区!

研究核心亮点

1

数据整合与亚群识别:整合多组学数据,精准鉴定高转移潜能肿瘤细胞亚群并构建预测模型。

2

标志物与机制解析:AZGP1 被证实为前列腺癌转移独立保护性标志物,其低表达关联不良预后,还可通过激活糖酵解通路推动肿瘤转移进程。

3

表观调控与临床转化:明确 AZGP1 启动子甲基化是其表达下调的核心表观机制,提出该位点甲基化检测可作为前列腺癌转移动态监测潜在标志物,具备良好临床转化前景。

引言

🌟前列腺癌转移机制研究取得关键性突破。

🧐传统转移预测模型受肿瘤异质性等因素限制,评估准确性欠佳,临床亟需新的研究技术与思路来解决这一难题。

南京大学附属医院团队整合单细胞和批量转录组数据,利用 Scissor 算法精准筛选出高转移潜能的肿瘤细胞亚群,还证实 AZGP1 是前列腺癌转移的独立保护性因子。

🔎该研究发现 AZGP1 启动子甲基化引发的基因沉默,会激活肿瘤糖酵解重编程,大幅提升癌细胞的侵袭和远处转移能力。这一结果清晰揭示了前列腺癌转移的核心调控机制,也为临床开展转移风险动态监测、研发精准靶向干预手段提供了全新理论支撑和潜在实践策略。🏆🏆

本文研究创新性较强,结构严谨。关注生信解析!你的下一篇高分论文,说不定就从这里启航!

研究结果

研究背景

转移是导致前列腺癌患者死亡的首要原因,现阶段针对该病症仍缺乏有效的靶向治疗方案,筛选出可靠的生物标志物并解析其调控机制,对优化疾病临床管理至关重要。

研究方法

1.数据整合与亚群识别

整合多队列转录组数据,通过专业分析方法,精准鉴定出前列腺癌中具有转移优势的肿瘤细胞亚群,为后续研究奠定核心基础。

2.基因筛选与模型构建

筛选肿瘤转移相关候选基因,验证基因与临床转移表型的关联,经回归分析构建转移预测模型,成功锁定核心调控基因 AZGP1。

3.功能与机制验证

在多队列、细胞及动物模型中验证 AZGP1 的转移抑制功能,解析其通过调控糖酵解介导转移的代谢机制,阐明启动子甲基化调控其表达的表观机制。

研究结果

01.PCa转移预测模型建立:

研究首先从单细胞转录组数据中鉴定出 9 种细胞类型,再利用 Scissor 工具将管腔上皮细胞分为转移型和非转移型两个亚群。接着筛选出 9 个转移相关标记基因,其中 6 个核心基因在 TCGA-PRAD 队列中完成了临床验证。最终构建的前列腺癌转移预测模型 AUC 超 70%,并证实 AZGP1 是独立的转移预测核心因子。

图1. 转移亚群的鉴定与模型建立

02.表达与进展及预后相关

多数据集分析显示,AZGP1 低表达与前列腺癌 T/N 分期进展、Gleason 评分升高及肿瘤突变负荷增加均显著相关。

AZGP1 低表达还与患者无病、无复发及无进展生存期缩短密切相关,体内实验证实过表达 AZGP1 可有效抑制前列腺癌细胞的肺、骨转移能力。

免疫组化检测发现,非转移前列腺癌组织中 AZGP1 的组织学评分显著高于转移组织,进一步验证了其与肿瘤转移的负相关关系。

综上,AZGP1 表达水平降低会促进前列腺癌进展并影响患者预后。

图2. AZGP1表达水平降低会促进前列腺癌(PCa)的进展并影响其预后

03.促进肿瘤进展和转移

AZGP1 在不同前列腺癌细胞系中的表达呈明显梯度差异,原发性肿瘤细胞中表达最高,去势敏感性细胞次之,转移性去势抵抗性细胞中表达水平最低。

细胞功能实验证实,敲低 AZGP1 可显著增强 22RV1 细胞的迁移和侵袭能力,而过表达 AZGP1 则能有效抑制 PC3 细胞的迁移与侵袭表型。

Western blot 检测结果显示,AZGP1 敲低后 N-cadherin、VEGFA、MMP7 等转移相关蛋白表达上调,E-cadherin 表达下调,AZGP1 过表达后上述蛋白的表达趋势则完全相反。

图3. AZGP1调控前列腺癌细胞的增殖与迁移

04.激活糖酵解通路

代谢通路分析发现,AZGP1 低表达的肿瘤细胞糖酵解活性显著升高。

进一步分析显示,AZGP1 表达水平与糖酵解通路 ssGSEA 评分呈显著负相关,同时也与 LDHA、GP1 等 6 种糖酵解关键酶的表达呈明显负相关。

功能实验验证表明,在 PC3 细胞中过表达 AZGP1 可显著减少乳酸生成、降低细胞外酸化率(ECAR)并提高耗氧率(OCR);而在 22RV1 细胞中敲低 AZGP1 则会显著增加乳酸生成和 ECAR,同时降低 OCR,明确证实 AZGP1 可调控肿瘤细胞的糖酵解过程。

图4. AZGP1表达降低可激活糖酵解途径

05.子甲基化调控其表达

AZGP1 启动子区 cg26429636 位点的甲基化水平与其 mRNA 表达呈显著负相关,且该位点在淋巴结转移(N1)的前列腺癌患者中甲基化水平更高。

AZGP1 的表达量与 DNA 甲基转移酶 DNMT1、DNMT3A、DNMT3B 的表达均呈负相关;而 cg26429636 位点的甲基化水平则与 DNMT1、DNMT3A 的表达呈正相关,提示甲基转移酶参与调控该位点甲基化。

甲基化特异性 PCR(MSP)实验验证显示,去势敏感型前列腺癌细胞系 22RV1、LNCaP 中 AZGP1 启动子为未甲基化状态,而转移性去势抵抗型细胞系 PC3、DU145 中该区域呈部分甲基化状态。

图5. 差异启动子区域甲基化调控AZGP1在前列腺癌转移中的表达

文章小结

综上可见,AZGP1 启动子区的甲基化修饰会显著抑制其转录表达,进而通过激活肿瘤细胞的糖酵解重编程,最终推动前列腺癌的转移进程。此外,检测 AZGP1 的甲基化水平,也可为前列腺癌转移的动态监测提供重要的临床参考依据。

玩转数据分析,复刻高分科研思路?生信解析,医学 SCI 全流程服务,等你来约!

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  1. CONNECT:[ UseTime:0.000868s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000876s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000333s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000581s ]
  8. SELECT * FROM `article` WHERE `id` = 469497 LIMIT 1 [ RunTime:0.000632s ]
  9. UPDATE `article` SET `lasttime` = 1771227477 WHERE `id` = 469497 [ RunTime:0.008357s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000265s ]
  11. SELECT * FROM `article` WHERE `id` < 469497 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000818s ]
  12. SELECT * FROM `article` WHERE `id` > 469497 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.008293s ]
  13. SELECT * FROM `article` WHERE `id` < 469497 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001313s ]
  14. SELECT * FROM `article` WHERE `id` < 469497 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001612s ]
  15. SELECT * FROM `article` WHERE `id` < 469497 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001251s ]
0.183548s