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Open Access Article

International Journal of Clinical Research. 2026; 10: (9) ; 23-35 ; DOI: 10.12208/j.ijcr.20260430.

Molecular mechanisms and frontier advances in the diagnosis and treatment of intrahepatic cholangiocarcinoma
肝内胆管癌的分子机制与诊疗前沿进展

作者: 杨真诚, 陈雪健, 胡子豪, 徐力善, 郑宏群 *

哈尔滨医科大学附属第四医院肿瘤外科肝胆外科 黑龙江哈尔滨

*通讯作者: 郑宏群,单位:哈尔滨医科大学附属第四医院肿瘤外科肝胆外科 黑龙江哈尔滨 ;

发布时间: 2026-09-10 总浏览量: 15 下载量: 加载中...

摘要

近年来,肝内胆管癌(iCCA)发病率在全球范围内逐年上升,推动因素也从以前的肝吸虫感染及病毒性肝炎转为代谢综合征和非酒精性脂肪性肝病等。而且这种癌症很少通过肝硬化而发展成为恶性肿瘤,这改变了我们对它生物学行为以及发生发展过程的认识。以往的观点是,长期慢性炎症会导致一系列遗传学或表观遗传学变化进而引起恶性肿瘤发生;然而iCCA具有高度异质性,可区分为小胆管型及大导管型两类。小胆管型主要见于FGFR2融合或IDH1/2突变,而大导管型则以KRAS、TP53突变及CDKN2A/B缺失为主。这些不同分子表型为精准治疗指明方向。另外,在组织学上iCCA一个显著特点是富含大量活化癌相关成纤维细胞形成的致密间质,造成一种“免疫排除”型微环境,使得药物难以穿透且缺乏有效的效应性T细胞浸润。尽管手术切除目前仍是最有效的治疗方法,但术后五年复发率仍较高(约50%-70%)。而胆道癌辅助化疗Ⅲ期试验(BILCAP)和日本临床肿瘤研究组1202试验(JCOG1202/ASCOT)两项研究均证实了卡培他滨或者S-1作为术后辅助化疗的有效性,BILCAP研究显示卡培他滨辅助化疗使符合方案集患者中位OS延长至53个月(对照组36个月,HR=0.75);JCOG1202研究证实S-1可使3年生存率提高至77.1%(对照组67.6%,HR=0.69)。对于可以手术切除患者,樊嘉院士等人开展了一项ZSAB-neoGOLP III期临床试验结果显示,新辅助GOLP治疗能够显著改善高风险患者的无病生存期,较直接手术显著延长中位无事件生存期(18.0 vs. 8.7个月,HR=0.43)并使R0切除率达到95%以上。而在晚期一线治疗中,TOPAZ-1以及KEYNOTE-966两项大型III期临床试验均已明确表明抗PD-L1抗体联合化疗是有效方案。此外,在某些特定分子亚型例如FGFR2融合或IDH1突变情况下,Pemigatinib、Futibatinib等靶向药物以及Ivosidenib等新型抑制剂都显示出巨大潜力。对于不能切除或局限于肝脏病灶者,经动脉化疗栓塞术(TACE)、钇‑90选择性内放射治疗(Y90-SIRT)以及肝动脉灌注化疗(HAIC)等局部区域治疗方法都可以起到一定作用并且可以与全身治疗结合使用。最后,液体活检尤其是ctDNA由于其简便快捷、灵敏度高以及可连续进行监测等优势而在疾病早期发现、复发预警以及耐药机制研究等方面远远优于传统组织活检方法。

关键词: 肝内胆管癌;精准靶向治疗;肿瘤微环境;免疫治疗;液体活检

Abstract

The rate of intrahepatic cholangiocarcinoma (iCCA) has increased over the last several decades in most parts of the world and the underlying cause has shifted as well as liver fluke infections and viral hepatitis to metabolic syndrome and non-alcoholic fatty liver disease. These people may acquire cancer at once without going through cirrhosis, altering the way we perceive the course of the illness. The pathogenesis of iCCA is characterized by an evolutionarily based model of chronic inflammation-genetic and epigenetic changes-malignancy. Cell origin is responsible for a fundamental difference between the two types of cell origin; both have different molecular mutation spectra, stromal reactions, and biological behaviors: the small-duct type has its etiology largely determined by FGFR2 fusions and IDH1/2 mutations, whereas the large-duct type is defined by mutations in the KRAS and TP53 genes and the loss of CDKN2A/B. This molecular plan is the foundation of precision treatment. The hallmark of iCCA in histopathology is the presence of a very dense stroma formed by large numbers of cancer-related fibroblasts that generate an immune-excluded microenvironment that does not allow drugs to penetrate or CD8+ T cells to infiltrate. In connection to treatment, R0 resection is the only potentially curative choice, however, the 5-year postoperative recurrence is 50%-70%. Biliary Cancer Adjuvant Chemotherapy Phase III (BILCAP) and Japan Clinical Oncology Group 1202/Adjuvant S‑1 for Biliary Tract Cancer (JCOG1202/ASCOT) trials have demonstrated capecitabine and S-1 as standards of adjuvant chemotherapy. The BILCAP trial demonstrated that capecitabine adjuvant chemotherapy extended median overall survival in the per protocol population (53.0 vs. 36.0 months; HR=0.75), and the JCOG1202/ASCOT trial confirmed that S-1 improved 3-year survival (77.1% vs. 67.6%; HR=0.69).The most recent perioperative advance has been made by the ZSAB-neoGOLP Phase III trial conducted by Fan Jia and Zhou Jian: the Phase III ZSAB-neoGOLP trial showed that neoadjuvant GOLP significantly improved event-free survival in high-risk patients compared with upfront surgery (median 18.0 vs. 8.7 months; HR=0.43)and the rate of R0 resection was 95%. Durvalumab or pembrolizumab with gemcitabine-cisplatin has become the standard of care in the first-line setting of advanced disease with the TOPAZ-1 and KEYNOTE-966 Phase III studies solidifying this combination. In later lines, survival outcomes of patients with particular molecular subtypes have been significantly improved by agents targeting FGFR2 fusions (pemigatinib, futibatinib), and the IDH1 inhibitor ivosidenib. When it is unresectable but limited to the liver, locoregional treatments [transarterial chemoembolization (TACE), yttrium‑90 selective internal radiation therapy (Y90-SIRT), and hepatic artery infusion chemotherapy (HAIC)] are effective in controlling the disease, and their synergistic benefit with systemic therapy is now better recognized. Throughout the whole course of the disease, liquid biopsy, particularly ctDNA, is showing a potential that cannot be replaced by tissue biopsy, as it overcomes the problems with sampling, gives an early warning of recurrence, and allows monitoring of resistance mutations in real time.

Key words: Intrahepatic cholangiocarcinoma; Precision targeted therapy; Tumor microenvironment; Immuno-therapy; Liquid biopsy

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引用本文

杨真诚, 陈雪健, 胡子豪, 徐力善, 郑宏群, 肝内胆管癌的分子机制与诊疗前沿进展[J]. 国际临床研究杂志, 2026; 10: (9) : 23-35.