临床荟萃 ›› 2025, Vol. 40 ›› Issue (12): 1147-1152.doi: 10.3969/j.issn.1004-583X.2025.12.017
• 综述 • 上一篇
收稿日期:2025-11-05
出版日期:2025-12-20
发布日期:2025-12-30
通讯作者:
张华平,Email:1207930396@qq.com
Received:2025-11-05
Online:2025-12-20
Published:2025-12-30
摘要:
胶质母细胞瘤(glioblastoma,GBM)是成人中枢神经系统最常见且恶性程度最高的原发性肿瘤,具有显著的遗传异质性与表观遗传异质性,导致其诊疗监测困难、复发率高且预后极差。现有诊断手段如神经影像学和组织活检存在无法动态反映肿瘤状态、难以区分治疗相关性假性进展与真性进展等局限。液体活检作为一种微创检测技术,通过分析体液中肿瘤来源的生物标志物(如细胞游离核酸、细胞外囊泡、循环肿瘤细胞、肿瘤教育血小板等),为GBM的早期诊断、预后评估、治疗响应监测及复发预警提供了新途径。本文系统综述GBM液体活检中各类生物标志物的特性、检测技术、临床研究进展,分析当前面临的挑战,并展望其未来临床转化方向,旨在为GBM精准诊疗研究提供参考。
中图分类号:
陈绍鹏, 张华平. 液体活检在胶质母细胞瘤诊断与监测中的研究进展[J]. 临床荟萃, 2025, 40(12): 1147-1152.
| 标志物类型 | 主要亚型 | 来源 | 检测技术 | 优势 | 局限性 | 临床应用方向 |
|---|---|---|---|---|---|---|
| 细胞游离DNA | cfDNA(其中肿瘤来源部分为ctDNA) | 肿瘤细胞坏死/凋亡 | NGS、ddPCR、PCR | 携带肿瘤突变/甲基化信息,可动态监测 | 外周血浓度低,受炎症干扰 | 诊断、预后评估、治疗响应监测 |
| 细胞游离RNA | cfRNA(miRNA、lncRNA) | 肿瘤细胞分泌 | RT-qPCR、NGS | 反映基因表达动态,组织特异性高 | 易降解,需EV保护或特殊保存 | 诊断、复发预警、治疗分层 |
| EVs | 外泌体(30~100 nm) | 肿瘤细胞内体途径 | 超离心、密度梯度离心、质谱 | 内容物稳定,可通过BBB | 分离无标准化protocol,检测成本高 | 诊断、治疗响应监测、靶向药物载体 |
| 微囊泡 | 微囊泡(0.1~1 μm) | 肿瘤细胞膜出芽 | 流式细胞术、免疫磁珠分选 | 易分离,蛋白标志物丰富 | 与其他囊泡区分困难 | 复发预警、炎症相关监测 |
| CTCs | GBM来源CTCs | 肿瘤原发灶脱落 | 免疫细胞化学、微流控芯片、FISH | 携带完整肿瘤基因组,反映侵袭能力 | 外周血稀有,检测敏感度低 | 分子分型、转移风险评估 |
| TEPs | TEPs | 血小板被肿瘤“教育” | RNA测序、RT-qPCR | RNA稳定性高,易获取 | 缺乏GBM特异性RNA标志物 | 诊断、假性进展区分、实时监测 |
表1 GBM液体活检主要生物标志物特性对比
| 标志物类型 | 主要亚型 | 来源 | 检测技术 | 优势 | 局限性 | 临床应用方向 |
|---|---|---|---|---|---|---|
| 细胞游离DNA | cfDNA(其中肿瘤来源部分为ctDNA) | 肿瘤细胞坏死/凋亡 | NGS、ddPCR、PCR | 携带肿瘤突变/甲基化信息,可动态监测 | 外周血浓度低,受炎症干扰 | 诊断、预后评估、治疗响应监测 |
| 细胞游离RNA | cfRNA(miRNA、lncRNA) | 肿瘤细胞分泌 | RT-qPCR、NGS | 反映基因表达动态,组织特异性高 | 易降解,需EV保护或特殊保存 | 诊断、复发预警、治疗分层 |
| EVs | 外泌体(30~100 nm) | 肿瘤细胞内体途径 | 超离心、密度梯度离心、质谱 | 内容物稳定,可通过BBB | 分离无标准化protocol,检测成本高 | 诊断、治疗响应监测、靶向药物载体 |
| 微囊泡 | 微囊泡(0.1~1 μm) | 肿瘤细胞膜出芽 | 流式细胞术、免疫磁珠分选 | 易分离,蛋白标志物丰富 | 与其他囊泡区分困难 | 复发预警、炎症相关监测 |
| CTCs | GBM来源CTCs | 肿瘤原发灶脱落 | 免疫细胞化学、微流控芯片、FISH | 携带完整肿瘤基因组,反映侵袭能力 | 外周血稀有,检测敏感度低 | 分子分型、转移风险评估 |
| TEPs | TEPs | 血小板被肿瘤“教育” | RNA测序、RT-qPCR | RNA稳定性高,易获取 | 缺乏GBM特异性RNA标志物 | 诊断、假性进展区分、实时监测 |
| 生物标志物 | 检测样本 | 关键发现 | 检测技术 | 研究规模 (例) |
|---|---|---|---|---|
| ctDNA(TP53/EGFR) | 血浆 | 55%患者检测到突变,突变阳性者OS缩短3.2个月[ | NGS | 222 |
| cfDNA浓度 | 血浆 | 术前浓度>10 ng/ml者无进展生存期缩短4.5个月,OS缩短6.8个月[ | 荧光定量法 | 62 |
| EVs MGMT甲基化 | CSF | 预测替莫唑胺治疗响应的敏感度85.7%,特异度90%[ | ddPCR | 49 |
| 外泌体miR-19b-3p | 血清 | 诊断GBM的敏感度78%,特异度85%,与肿瘤增殖指数正相关[ | RT-qPCR | 87 |
| CTCs(GFAP+) | 外周血 | 放疗前检测率72%,放疗后降至8%,CTCs数量>3个/ml者复发风险升高3倍[ | 荧光报告系统 | 45 |
| TEPs RNA谱 | 全血 | 区分GBM与健康人的准确率95%,区分假性进展与真进展的准确率85%[ | RNA测序 | 120 |
| CSF miR-128/485-3p | CSF | 诊断GBM的敏感度82%,特异度91%,可区分WHO Ⅲ级与Ⅳ级胶质瘤[ | RT-qPCR | 63 |
| 微囊泡miR-625-5p | 血浆 | 术后表达降至正常,复发时升高2倍以上,预警复发的敏感度80%[ | RT-qPCR | 36 |
表2 GBM液体活检生物标志物的关键临床研究结果
| 生物标志物 | 检测样本 | 关键发现 | 检测技术 | 研究规模 (例) |
|---|---|---|---|---|
| ctDNA(TP53/EGFR) | 血浆 | 55%患者检测到突变,突变阳性者OS缩短3.2个月[ | NGS | 222 |
| cfDNA浓度 | 血浆 | 术前浓度>10 ng/ml者无进展生存期缩短4.5个月,OS缩短6.8个月[ | 荧光定量法 | 62 |
| EVs MGMT甲基化 | CSF | 预测替莫唑胺治疗响应的敏感度85.7%,特异度90%[ | ddPCR | 49 |
| 外泌体miR-19b-3p | 血清 | 诊断GBM的敏感度78%,特异度85%,与肿瘤增殖指数正相关[ | RT-qPCR | 87 |
| CTCs(GFAP+) | 外周血 | 放疗前检测率72%,放疗后降至8%,CTCs数量>3个/ml者复发风险升高3倍[ | 荧光报告系统 | 45 |
| TEPs RNA谱 | 全血 | 区分GBM与健康人的准确率95%,区分假性进展与真进展的准确率85%[ | RNA测序 | 120 |
| CSF miR-128/485-3p | CSF | 诊断GBM的敏感度82%,特异度91%,可区分WHO Ⅲ级与Ⅳ级胶质瘤[ | RT-qPCR | 63 |
| 微囊泡miR-625-5p | 血浆 | 术后表达降至正常,复发时升高2倍以上,预警复发的敏感度80%[ | RT-qPCR | 36 |
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