Advances in Clinical Medicine
Vol. 13  No. 02 ( 2023 ), Article ID: 61658 , 6 pages
10.12677/ACM.2023.132367

干扰素-α预防及治疗乙肝相关性肝癌的 研究进展

刘辉,鲁晓擘*

新疆医科大学第一附属医院感染科,新疆 乌鲁木齐

收稿日期:2023年1月21日;录用日期:2023年2月16日;发布日期:2023年2月22日

摘要

乙型肝炎病毒(HBV)感染引起的慢性乙型肝炎(CHB),是导致肝细胞癌(HCC)发生的最大病因。干扰素-α对慢性乙型肝炎患者有降低肝细胞癌发生风险的作用,对于已经发生肝细胞癌的患者仍有明显的益处,如使肿瘤复发减少或推迟,生存期延长等。本文就干扰素-α预防及治疗肝细胞癌(HCC)方面的内容进行展开综述。

关键词

乙型肝炎,肝细胞癌,干扰素,聚乙二醇干扰素

Interferon-α Research Progress in Prevention and Treatment of Hepatitis B Related Liver Cancer

Hui Liu, Xiaobo Lu*

Department of Infection, The First Affiliated Hospital of Xinjiang Medical University, Urumqi Xinjiang

Received: Jan. 21st, 2023; accepted: Feb. 16th, 2023; published: Feb. 22nd, 2023

ABSTRACT

Chronic hepatitis B (CHB), caused by hepatitis B virus (HBV) infection, is the largest cause of hepatocellular carcinoma (HCC). Interferon-α has the effect of reducing the risk of hepatocellular carcinoma in patients with chronic hepatitis B, and still has obvious benefits for patients who have already had hepatocellular carcinoma, such as reducing or delaying tumor recurrence, prolonging survival, etc. This article focuses on interferon-α prevention and treatment of hepatocellular carcinoma (HCC).

Keywords:Hepatitis B, Hepatocellular Carcinoma, Interferon, Pegylated Interferon

Copyright © 2023 by author(s) and Hans Publishers Inc.

This work is licensed under the Creative Commons Attribution International License (CC BY 4.0).

http://creativecommons.org/licenses/by/4.0/

1. 简介

肝细胞癌(Hepatocellular carcinoma, HCC)是世界上第三大癌症死亡原因 [1] ,每年约有60万人因此而死亡。乙型肝炎病毒(Hepatitis B virus, HBV)感染是HCC的一个重要病因,全世界约有2.5亿人感染,尤其是非洲和东亚地区 [2] 。在我国,原发性肝癌是常见恶性肿瘤的第4位和肿瘤致死病因的第2位 [3] ,而我国患者发生肝细胞癌的最主要原因是乙肝病毒(HBV)感染,肝细胞癌发病的80%以上与HBV有关。

干扰素-α (interferon-α, IFN-α)是一种具有抗病毒、抗肿瘤、抑制细胞增殖、调节免疫等功效的可溶性糖蛋白,由感染细胞和转化细胞分泌而成 [4] 。干扰素聚乙二醇化(Pegylated, PEG)后的产物聚乙二醇干扰素(Pegylated interferon, PEG-IFN),添加了大量的分支聚乙二醇分子,增加了干扰素的分子量,减少了药物的排泄,屏蔽了干扰素分子表面的抗原决定簇,降低了免疫原性,降低了体内干扰素的清除率,半衰期可延长至40小时 [5] 。自1957年干扰素被发现是“干扰”病毒复制的因子以来,干扰素-α被证明可以治疗包括流感、慢性乙肝、慢性丙肝、慢性丁肝、人乳头瘤病毒(Human papillomavirus, HPV)感染、人类免疫缺陷病毒(human immunodeficiency virus, HIV)感染及新型冠状病毒(COVID-19)感染等广泛的感染性疾病,并在膀胱癌、慢性粒细胞白血病、淋巴瘤、恶性黑色素瘤、肾细胞癌、乳腺癌、多发性骨髓瘤及肝细胞癌等恶性肿瘤的治疗中取得了一定疗效 [6] 。本文就干扰素在预防及治疗肝细胞癌的应用综述如下。

2. 干扰素-α减少乙型肝炎患者肝细胞癌的发生

干扰素-α治疗与口服核苷(酸)类药物或不治疗相比,对慢性乙肝、肝硬化代偿期患者有明显降低HCC风险的作用。我国一项中位随访时间达10.05年的队列研究研究显示,使用干扰素治疗组的患者HCC年发生率为2.7/1000人/年,NAs治疗组为6.76/1000人/年,未治疗的对照组为13.02/1000人年 [7] 。其他研究结果也得到了类似结论 [8] [9] [10] ,这可能是由于干扰素治疗不仅能达到较高的临床治愈率(又称功能性治愈:停止治疗后仍保持HBsAg阴性,伴或不伴抗-HBs出现、HBV-DNA检测不到、肝脏生物化学指标正常、肝脏组织病变改善 [11] ),新加坡的一场随机对照试验发现,对口服核苷类药物的慢性乙型病毒性肝炎患者给予添加或切换为聚乙二醇干扰素α-2b治疗48周,对照组、添加组和切换组的临床治愈率分别为0%、10.1%和7.8%,使用聚乙二醇干扰素治疗的患者临床治愈率明显高于单纯口服核苷类药物的患者 [12] ;同时又可导致HBV感染肝细胞中cccDNA降解,并诱导多种细胞蛋白协同抑制cccDNA转录 [13] 。Ren等 [14] 以四种肝癌风险模型(The Chinese University HCC score, CU-HCC; The Guide with Age, Gender, HBV DNA, Core Promoter Mutations and Cirrhosis HCC score, GAG-HCC; Risk estimation for hepatocellular carcinoma in chronic hepatitis B, REACH-B; platelet age gender-B, PAGE-B)评估高风险及低风险的CHB患者,结果表明,对于低风险的患者(CU-HCC < 5, GAG-HCC < 82, REACH-B < 8, PAGE-B < 10),以IFN-α为基础的治疗组和NAs组的总累积HCC发病率没有显著差异,而对于高风险的患者(CU-HCC ≥ 5, GAG-HCC ≥ 82, REACH-B ≥ 8, PAGE-B ≥ 10),IFN-α组HCC发病率显著低于NAs组。

3. 高水平的HBsAg、HBV-DNA及乙肝病毒e抗原(HBeAg)阳性增加了肝细胞癌复发的风险

与肿瘤多中心发生或术前可能已有微小播散灶有关,肝细胞癌切除术后5年肿瘤复发或转移发生率高达40%~70% [15] 。多将早期复发定义为术后2年内的复发,远期复发定义为术后2年之后的复发 [16] 。而高水平的HBsAg、HBV-DNA以及HBeAg阳性增加了肝细胞癌术后复发的风险,对于低病毒载量的HBeAg阴性患者,高水平的HBsAg同样预示着较高的复发风险 [17] 。我国的两项临床研究均表明,术前HBsAg较低(<1000 IU/mL)患者肝癌患者术后1年、3年和5年总生存率(Overall survival rate, OS)及5年无复发生存率(Relapse free survival, RFS)均明显高于HBsAg较高(≥1000 IU/mL)的HCC患者 [18] [19] 。韩国一项观察HCC术后远期复发的队列研究也发现,样本量为2520例,平均随访6.9年后,术后未HBsAg血清清除的患者比HBsAg血清清除的患者更快地出现为HCC复发,该研究共纳入HBV相关HCC治疗性肝切除的患者2520名,术后未获得HBsAg清除的患者肝细胞癌复发率为36.4% (855/2348),平均复发时间为5.1年,获得HBsAg清除的患者复发率为20.9% (36/172),平均复发时间为8.4年,两组差异具有统计学意义(P < 0.05) [20] 。

4. 干扰素可减少肝细胞癌手术或介入治疗后的转移和复发

大量临床研究及荟萃分析均表明,无论对于肝细胞癌根治性治疗(包括手术切除及射频消融术)或非根治性治疗(介入治疗等),术后加用干扰素或聚乙二醇干扰素对减少复发或转移,延长生存,改善生活质量均有一定效果。

4.1. 抑制术后复发

早在聚乙二醇干扰素被广泛用于治疗HBV感染前,就有大量研究表明IFN-α治疗对HCC切除术有一定益处。Sun等 [21] 发现,肝癌切除术后的患者给予干扰素每周三次皮下注射,中位生存期为63.8个月,而对照组为38.8个月。其他研究也发现,干扰素治疗HCC切除术后的患者可减少术后两年复发率,增加两年生存率 [22] ,对于TNMⅠ/II期肿瘤患者的5年生存率可能没有任何益处,但可提高Ⅲ/IVA期患者的5年生存期 [23] 。而另一项随机对照研究得出了相反的答案,Chen等 [24] 发现,给予IFN-α-2b治疗53周,106例实验组和109例对照组的OS(总生存期)与RFS(无复发生存期)并无显著差异,IFN-α-2b不能降低HBV相关HCC的术后复发。

PEG-IFN被广泛用于乙型肝炎治疗后,关于PEG-IFN治疗肝细胞癌的研究也逐步展开。同样是在中国进行的大规模随机对照实验,对肝切除术或消融术后HBV-DNA阳性的HCC患者进行抗病毒治疗,分为早期联合(恩替卡韦加Peg-IFNα-2a,第1年联合用药),晚期联合(恩替卡韦治疗1年后加入Peg-IFN-α-2a),恩替卡韦单药治疗和非抗病毒治疗,共纳入447例患者,结果表明早期联合治疗组的2年和8年无复发生存率、8年总生存率明显高于其他两组抗病毒治疗组,且HBsAg平均水平明显低于其余三组 [25] ,证明HCC术后不仅应添加IFN治疗,而且应尽早,在开始抗病毒时就联合NA和IFN治疗。

4.2. 无法手术切除的患者

Lin等 [26] 的研究发现,肝细胞癌患者经肝动脉化疗栓塞(Hepatic artery chemoembolization, TACE)治疗后,应用IFN治疗与对照组的1年复发率分别为25%、40%,4年复发率分别为47%、90%;Li等 [27] 也证明,干扰素联合TACE治疗的RFS、OS及2年总生存率均高于单纯TACE患者。提示TACE治疗后的HCC患者接受干扰素治疗,早期和晚期复发率会明显降低,生存期也会延长。

4.3. 与其他药物联合治疗

干扰素与其他药物联合方案也被广泛应用于肿瘤的治疗,如与5-氟尿嘧啶联合治疗肺癌、肾癌及消化道肿瘤,与卡培他滨联合治疗转移性肾细胞癌,与阿扎胞苷联合治疗黑色素瘤等 [6] 。同样,干扰素的联合方案在肝癌的治疗中也占据着重要地位。我国一项回顾性研究发现 [28] ,对于肝癌复发的患者,射频消融术(Radiofrequency ablation, RFA)联合索拉非尼和干扰素治疗,相比于不添加干扰素的对照组,虽不能延长患者无复发生存期(RFS),但可提高生活质量,延长总体生存期。Hu等 [29] 研究发现,对于不可切除的肝细胞癌,干扰素联合PD-1治疗可显著提高肿瘤控制率。该研究纳入了15例以PD-1为基础的免疫疗法联合IFN-α治疗的不可切除的肝细胞癌患者,发现其疾病控制率(Disease control rate, DCR)可达80% (15例中的12例)。研究其机理发现,在小鼠模型中,干扰素联合PD-1会减少葡萄糖在肿瘤细胞中的摄取和糖酵解,并增强肿瘤浸润细胞毒性T淋巴细胞(Cytotoxic T lymphocytes, CTL)的糖酵解。由此可见,PD-1联合干扰素对肝细胞癌的治疗可能是一个大有可为的策略。日本曾就干扰素-α联合S-1治疗肝癌肝外转移进行临床研究 [30] ,结果显示S-1联合IFN-α和S-1单药治疗两组药物之间的有效率,总生存率,和无进展生存率均无显著差异,但安全性良好。其他如6-羟基-3-O-甲基山奈酚6-O-吡喃葡萄糖苷 [31] 、槲皮素 [32] 等,虽然有增强干扰素活性,加强其抗肿瘤、抗增殖作用的可能,但还有待更多临床试验进一步验证。

5. 结语

目前,PEG-IFN-α已在乙肝的治疗中得到广泛应用,并获得良好的疗效,被证明能获得较高的临床治愈率,减少肝细胞癌在肝炎、代偿期肝硬化患者中的发生。干扰素用于治疗肝细胞癌安全性良好,对于减少复发和转移,延长生存有一定疗效,但仍存在争议。对于肝细胞癌患者在肝切除术、消融术或介入治疗后单独或联合应用干扰素进行治疗,需要更多合理设计、大样本、多中心的随机对照研究,才能验证效果。

文章引用

刘 辉,鲁晓擘. 干扰素-α预防及治疗乙肝相关性肝癌的研究进展
Interferon-α Research Progress in Prevention and Treatment of Hepatitis B Related Liver Cancer[J]. 临床医学进展, 2023, 13(02): 2594-2599. https://doi.org/10.12677/ACM.2023.132367

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  33. NOTES

    *通讯作者。

期刊菜单