当前位置:首页>南京>IF44.8!吾辈楷模!南京医科大学博士生共一斩获Cancer Cell!胶质母细胞瘤治疗新思路!

IF44.8!吾辈楷模!南京医科大学博士生共一斩获Cancer Cell!胶质母细胞瘤治疗新思路!

  • 2026-03-29 15:58:36
IF44.8!吾辈楷模!南京医科大学博士生共一斩获Cancer Cell!胶质母细胞瘤治疗新思路!

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生信客

Bioinformatics passenger

胶质母细胞瘤里的浆细胞竟是 “帮凶”,专靠分泌免疫球蛋白助力肿瘤干细胞生长!

✅ 胶质母细胞瘤是恶性脑肿瘤,肿瘤干细胞是其恶性发展的关键,而肿瘤微环境里的浆细胞作用此前鲜少被探究。

✅ 南京医科大学基础医学院发现这类浆细胞会异常富集在肿瘤中,还和患者糟糕的预后紧密相关。

✅ 其背后的作用机制和潜在治疗靶点,也成为攻克胶质母细胞瘤的新突破口。

✅ 一起剖析背后的思维框架与内在逻辑吧~

想做数据分析?锁定生信客,每天分享高分文献,手把手教你创新选题,定制思路,全面数据分析!第一时间投稿抢发,锁定领域首发优势!需要的快关注我们后台咨询吧!

01

研究亮点

02

研究创新

● 明确浆细胞的异常富集与预后关联

发现胶质母细胞瘤中浆细胞(PCs)异常富集,低体细胞超突变率为其独有特征,与不良预后相关。

● 揭示促癌分子机制

明确 PCs 分泌的 IgG 结合 GSCs 表面 FcγRIIA,激活 AKT-mTOR 通路,促进 GSCs 增殖与自我更新。

● 阐明浆细胞招募路径

揭示 PCs 源于外周淋巴组织,经 GSCs 分泌的 CCL2 与 PCs 表达的 CCR2 互作,招募至 GSC 生态位。

● 提出免疫治疗新方案

发现 IgG1 型免疫检查点抑制剂可通过 Fc 片段促瘤,提出靶向 FcγRIIA 或联合 PI3K 抑制剂的治疗方案。

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近期前沿热点:虚拟细胞、虚拟敲除🌹

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文献解读

03

研究背景

胶质母细胞瘤恶性程度高、预后差,肿瘤干细胞是其核心推手。但肿瘤微环境中浆细胞的作用一直没被摸清,其与肿瘤干细胞的互动机制,成了亟待破解的难题。

04

研究方法

样本与模型

收集患者肿瘤样本及健康供体血液样本,分离相关细胞;

● 构建人源化免疫系统小鼠、免疫缺陷小鼠等动物模型,建立 GSC 细胞系及对照体系。

多组学分析

● 运用单细胞 RNA 测序单细胞 B 细胞受体测序、bulk RNA-seq、染色质免疫沉淀测序,解析细胞特征、免疫球蛋白亚型及表观遗传活性。

细胞与分子实验

● 通过流式细胞术分选细胞,开展共培养、Transwell 迁移等功能验证实验;

● 利用免疫荧光、免疫组化、ELISA 等检测细胞定位、标志物表达及蛋白浓度;

● 通过免疫沉淀、Western blot 验证蛋白互作及信号通路。

基因操作(基因敲除 / 过表达)

● 设计 shRNA 沉默 FCGR2A 基因,构建过表达载体重构其表达,验证对 GSC 功能的影响。

05

研究结果

浆细胞异常富集

● 胶质母细胞瘤 B 系细胞中浆细胞占比显著升高,数据集 A 达 64.7%、B 达 46.0%,平均 47.47%,远高于健康人外周血。

图1 胶质母细胞瘤肿瘤浸润PC的异常富集

● 6 例在体样本中占 7%-29%,CD19、CD138、PRDM1 阳性细胞明确存在,人源化小鼠模型验证该富集现象。

图S1. 与外周血B系细胞相比,胶质母细胞瘤中肿瘤浸润的B系细胞呈现不同的亚型比例,与图1相关

浆细胞关联不良预后

● 40 例患者中,CD138+PRDM1 + 浆细胞占比高者总生存期更短(p=0.0025)。

● TCGA 分析显示,胶质母细胞瘤浆细胞特征评分差异最显著,体细胞超突变率最低,与其他肿瘤预后关联模式相反。

图2 肿瘤浸润性PC预示胶质母细胞瘤预后较差

浆细胞促进肿瘤生长

● 浆细胞与 GSCs 紧密相邻,耗竭浆细胞后小鼠肿瘤生长减缓、生存期延长。

图S3. 肿瘤浸润的浆细胞(PCs)促进胶质母细胞瘤干细胞(GSCs)增殖,与图3相关

● 肿瘤或健康供体来源浆细胞与 GSCs 共移植,均增加肿瘤体积、缩短生存期。

图3 肿瘤浸润型PC促进肿瘤生长并告知胶质母细胞瘤的劣后

IgG 是促癌关键分子

● 浆细胞主要分泌 IgG,肿瘤组织中 IgG 浓度显著高于正常脑组织。

● 仅 IgG 能促进 GSCs 增殖,且仅结合 GSCs,颅内注射可剂量依赖性加速肿瘤生长

图4 肿瘤浸润的PC分泌的IgG促进胶质母细胞瘤增生

促癌机制:IgG-FcγRIIA-AKT-mTOR 轴

● GSCs 高表达 FcγRIIA,沉默该基因降低 GSCs 活力,过表达可挽救。

图S5。IgG受体 FcγRIIA 在GSCs中优先表达,对GSCs增殖和自我更新至关重要,与图5相关

● IgG 结合 FcγRIIA 后激活 AKT-mTOR 通路,敲低 FcγRIIA 可阻断浆细胞或 IgG 的促瘤作用。

图5 IgG-FcγRIIA-AKT-mTOR轴在肿瘤浸润PC刺激下促进GSC肿瘤生长

浆细胞招募依赖 CCL2-CCR2 信号

● 50 例肿瘤样本仅 2 例存在不成熟三级淋巴结构,浆细胞源于外周。

● GSCs 高表达 CCL2,浆细胞表达 CCR2,抑制剂可阻断浆细胞迁移及促瘤作用。

图6 通过CCL2-CCR2趋化因子项目招募PC到GSC生态位

免疫检查点抑制剂促瘤悖论

● IgG1/IgG4 型抑制剂可通过 Fc 片段结合 FcγRIIA,激活通路促进 GSCs 增殖。

● 去除 Fc 片段的 F (ab’)₂片段无促瘤效应。

图S8.免疫检查点IgG抗体药物通过直接结合 FcγRIIA 阳性肿瘤细胞产生促肿瘤效应,与图5相关

靶向干预效果显著

● FcgRIIA 阻断剂可抑制 GSCs 增殖及 AKT-mTOR 激活,延长小鼠生存期。

● 联合 PI3K 抑制剂较单一治疗效果更显著,且可逆转免疫检查点抑制剂的促瘤效应。

图7 IgG受体阻断抑制肿瘤浸润的PC-GSC刺激,并在体内抑制GSC肿瘤发生

06

文章小结

综上所述,这项研究揭开了浆细胞促胶质母细胞瘤生长的关键机制,从招募路径到信号轴都给出了明确答案。不仅为理解肿瘤微环境提供新视角,还为靶向治疗指明方向,有望改善患者预后。

专注于数据挖掘,选题分析,方案评估,高分文献思路复刻,联系生信客,我们与您携手开辟生信科研新路径!

END

往期回顾:

IF9.7!恭喜首医学者零成本发文JAMA子刊!CHARLS神级思路速学!

IF7.4!学会打GBD 2023“擦边球”!中南湘雅二院用“GBD+多重共病”发二区!仅1天接收!

IF26.3!恭喜中山大学一附院博士生斩获双一区TOP!揭示转录因子ZNF750协同LSD1/KDM1A抑制皮肤表面炎症的分子机制!

IF48.5!国自然医科部主任,北大乔杰院士多组学研究拿下《Science》!肠菌研究顶刊范本!

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  1. CONNECT:[ UseTime:0.000630s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000776s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000352s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000296s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000505s ]
  6. SELECT * FROM `set` [ RunTime:0.000197s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000565s ]
  8. SELECT * FROM `article` WHERE `id` = 487831 LIMIT 1 [ RunTime:0.000479s ]
  9. UPDATE `article` SET `lasttime` = 1775328378 WHERE `id` = 487831 [ RunTime:0.001389s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000237s ]
  11. SELECT * FROM `article` WHERE `id` < 487831 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000424s ]
  12. SELECT * FROM `article` WHERE `id` > 487831 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000400s ]
  13. SELECT * FROM `article` WHERE `id` < 487831 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000657s ]
  14. SELECT * FROM `article` WHERE `id` < 487831 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001164s ]
  15. SELECT * FROM `article` WHERE `id` < 487831 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002104s ]
0.083342s