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IF10.9!! 恭喜南京鼓楼医院团队用六张图成功拿下双一区!

  • 2026-04-10 03:49:08
IF10.9!! 恭喜南京鼓楼医院团队用六张图成功拿下双一区!

研究核心亮点

图谱新维度

本研究整合 10 种癌型、100 例样本及 46 万 + 细胞,搭建出当前规模最大、癌型覆盖最全面的泛癌肝转移单细胞图谱,填补领域数据空白。

机制新轨迹:

借助无监督聚类分析,研究首次揭示肝转移 4 大核心细胞程序动态轨迹,明晰免疫活跃到抑制再到荒漠的演进规律。

临床新策略:

团队提出细胞程序分型的分层治疗策略,结合多组学验证细胞互作与预后关系,为精准靶向微环境、优化免疫治疗提供新方向。

引言

👀癌症转移依旧是造成癌症相关死亡的首要因素,这一复杂多步进程包含肿瘤细胞迁移、播散、定植以及与微环境的相互作用,明晰其分子与细胞程序,对研发有效治疗手段意义重大。肝转移更是癌症治疗中的棘手难题,可泛癌层面下其细胞分子特征与免疫调控机制,仍缺乏系统性研究。

✨本次为大家介绍南京鼓楼医院发表于《Research》(影响因子 10.9)的重磅研究。该研究依托 100 例单细胞测序样本,涵盖超 46 万个细胞,成功绘制出泛癌肝转移的高分辨率单细胞图谱,深度揭示了肿瘤转移进展与免疫调控的内在机制。

✨研究团队搭建起泛癌肝转移单细胞转录组图谱,精准解析出 4 类核心细胞程序,不仅为深入认知肝转移的异质性提供了重要依据,更为研发靶向肿瘤微环境的治疗方案搭建了核心理论框架。

本文研究创新性较强,结构严谨。关注生信茧房!私信进行咨询吧!你的下一篇高分论文,说不定就从这里启航!

文献解读

研究背景

01

肝转移一直是癌症临床治疗中亟待攻克的重大难题,然而目前针对泛癌水平的细胞分子特征及免疫调控机制,仍缺乏系统清晰的认知。本研究借助单细胞测序技术,致力于构建肝转移图谱,深入解析肿瘤转移进程与免疫调控的内在机制。

研究方法

02

本研究收集 100 例单细胞转录组测序样本,经严格质控筛选获得 46 万余个高质量细胞,依据标记基因注释为 121 种细胞亚型;再通过细胞浸润谱聚类得到 6 个细胞程序,重点筛选肝转移相关的 4 个核心程序并分析其组成与功能,结合拟时序、细胞通讯及拷贝数变异解析程序动态演变与关键调控机制,最后联合生存数据验证预后价值并提出基于细胞程序的免疫治疗分层策略。

研究结果

01

泛癌单细胞肝转移转录组图谱

本研究纳入 10 种癌型、100 例单细胞测序数据,构建出包含 19 大类主要细胞、121 个细分亚型的泛癌肝转移高分辨率转录组图谱。该图谱直观展现了不同原发癌肝转移灶在细胞构成与转录程序上的显著异质性,为系统解析肝转移的细胞与分子机制提供了重要数据资源。

图1:泛癌肝转移的单细胞转录组景观。

02

各癌症类型肝转移相关CP的鉴定

依据细胞浸润特点,研究将肝转移样本聚成 6 个稳定可重复的细胞程序。其中 CP5 在乳腺癌、肺癌、胃癌肝转移中富集且预后更佳,以 NK 细胞与 CD8 效应记忆 T 细胞大量浸润为特征。CP6 则主要由侵袭性更强的肝转移样本构成(乳腺癌除外),富集 Th1、Treg 等多种 T 细胞,呈现免疫激活与抑制共存的微环境,更易发生免疫逃逸。(图 2)

2:肝转移相关细胞项目(CPs)跨癌症。

03

轨迹分析揭示驱动转移进展的细胞过程

研究采用 CytoTRACE 与 Monocle2 对上皮细胞亚型开展分化轨迹分析,结果显示 AGR2 阳性上皮细胞属于分化早期阶段,LY6D 阳性细胞则处于分化后期。肝转移癌细胞的分化能力较弱,集中在轨迹末端,这一结果支持了转移性肿瘤由原发肿瘤逐步分化演进而来的理论假说。(图 3)

图3:伪时间轨迹分析揭示了上皮细胞过程推动转移进展。

04

CP1相关巨噬细胞亚型在免疫调节和转移进展中的应用

对巨噬细胞亚型的分析结果表明,Mac_SPP1 在肝转移组织中明显富集,而 Mac_VSIG4 则呈现下降趋势。在处于免疫富集状态的 CP1 中,包含 Mac_C1QB、Mac_SPP1 在内的 6 种巨噬细胞亚型显著升高,且大多与巨噬细胞总体浸润水平呈正相关,说明这些亚型在肝转移的免疫调节过程中发挥重要作用。(图 4)

图4:肝脏相关样本肿瘤微环境(TME)中巨噬细胞/单核细胞的特征。

05

CP5相关NK细胞与有利的整体生存结局相关

本研究共鉴定出 4 种 NK 细胞亚型,它们主要集中在 CP5 亚群中。除 NK_NKG7 以外,其余 NK 细胞亚型均与良好预后相关,这也印证了 CP5 转移活性低、患者生存期更优的特点。NK_NKG7 具有高细胞毒性、高炎症反应和高趋化因子(CCL3/4/5)表达特征,能够通过招募免疫细胞重塑肿瘤微环境。(图 5)

图5:肝脏相关样本肿瘤微环境(TME)中自然杀手(NK)细胞的特征。

06

CP6相关CD4 T细胞亚型及其在肝转移中的相互作用

研究对 CD4⁺T 细胞亚型展开分析,发现这类细胞在 CP6 中呈现高度浸润状态,并共鉴定出 12 个亚型。其中 5 种亚型在 CP6 中显著富集,且与局部 CD4⁺T 细胞浸润呈正相关。这些亚型高表达活化、效应分子及 TCR 信号相关基因;Treg 亚型则表现为高耗竭与共刺激特征,分别富集于 TGF‑β、IL‑2/STAT5 通路。(图 6)

图6:肝脏相关样本肿瘤微环境(TME)中CD4 T细胞的特征。

文章小结

本研究成功构建了泛癌肝转移的高分辨率单细胞图谱,阐明了由 4 类核心细胞程序主导的免疫状态动态变化,即从免疫监视活跃逐步转向免疫抑制乃至免疫荒漠。这一全新分型体系可用于临床患者的精准分层,同时为针对转移微环境的免疫治疗提供了创新思路与策略。

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往期回顾

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IF15.1!Nature 子刊!仅用 AI + GWAS 破解脊柱侧弯遗传密码,纯生信顶刊教你发高分!

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  1. CONNECT:[ UseTime:0.000419s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000604s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000271s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000271s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000625s ]
  6. SELECT * FROM `set` [ RunTime:0.000229s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000701s ]
  8. SELECT * FROM `article` WHERE `id` = 524093 LIMIT 1 [ RunTime:0.003848s ]
  9. UPDATE `article` SET `lasttime` = 1776385964 WHERE `id` = 524093 [ RunTime:0.007528s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.007368s ]
  11. SELECT * FROM `article` WHERE `id` < 524093 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000687s ]
  12. SELECT * FROM `article` WHERE `id` > 524093 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000542s ]
  13. SELECT * FROM `article` WHERE `id` < 524093 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000972s ]
  14. SELECT * FROM `article` WHERE `id` < 524093 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001673s ]
  15. SELECT * FROM `article` WHERE `id` < 524093 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001962s ]
0.100748s