Hoshida Yujin, Fuchs Bryan C, Bardeesy Nabeel, Baumert Thomas F, Chung Raymond T
Liver Cancer Program, Tisch Cancer Institute, Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, United States.
Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, United States.
J Hepatol. 2014 Nov;61(1 Suppl):S79-90. doi: 10.1016/j.jhep.2014.07.010. Epub 2014 Nov 3.
Hepatitis C virus (HCV) is one of the major aetiologic agents that causes hepatocellular carcinoma (HCC) by generating an inflammatory, fibrogenic, and carcinogenic tissue microenvironment in the liver. HCV-induced HCC is a rational target for cancer preventive intervention because of the clear-cut high-risk condition, cirrhosis, associated with high cancer incidence (1% to 7% per year). Studies have elucidated direct and indirect carcinogenic effects of HCV, which have in turn led to the identification of candidate HCC chemoprevention targets. Selective molecular targeted agents may enable personalized strategies for HCC chemoprevention. In addition, multiple experimental and epidemiological studies suggest the potential value of generic drugs or dietary supplements targeting inflammation, oxidant stress, or metabolic derangements as possible HCC chemopreventive agents. While the successful use of highly effective direct-acting antiviral agents will make important inroads into reducing long-term HCC risk, there will remain an important role for HCC chemoprevention even after viral cure, given the persistence of HCC risk in persons with advanced HCV fibrosis, as shown in recent studies. The successful development of cancer preventive therapies will be more challenging compared to cancer therapeutics because of the requirement for larger and longer clinical trials and the need for a safer toxicity profile given its use as a preventive agent. Molecular biomarkers to selectively identify high-risk population could help mitigate these challenges. Genome-wide, unbiased molecular characterization, high-throughput drug/gene screening, experimental model-based functional analysis, and systems-level in silico modelling are expected to complement each other to facilitate discovery of new HCC chemoprevention targets and therapies.
丙型肝炎病毒(HCV)是导致肝细胞癌(HCC)的主要病因之一,它通过在肝脏中形成炎症性、纤维化和致癌性组织微环境来引发肝癌。由于与高癌症发病率(每年1%至7%)相关的明确高风险状况——肝硬化,HCV诱导的肝癌是癌症预防干预的合理靶点。研究已经阐明了HCV的直接和间接致癌作用,这反过来又促成了肝癌化学预防候选靶点的确定。选择性分子靶向药物可能使肝癌化学预防的个性化策略成为可能。此外,多项实验和流行病学研究表明,针对炎症、氧化应激或代谢紊乱的通用药物或膳食补充剂作为可能的肝癌化学预防剂具有潜在价值。虽然高效直接作用抗病毒药物的成功使用将在降低长期肝癌风险方面取得重要进展,但鉴于近期研究表明,即使在病毒治愈后,晚期HCV纤维化患者仍存在肝癌风险,肝癌化学预防仍将发挥重要作用。与癌症治疗相比,癌症预防疗法成功开发面临的挑战更大,因为需要更大规模、更长时间的临床试验,且作为预防剂使用时需要更安全的毒性特征。选择性识别高危人群的分子生物标志物有助于应对这些挑战。全基因组、无偏分子特征分析、高通量药物/基因筛选、基于实验模型的功能分析以及系统水平的计算机模拟有望相互补充,以促进新的肝癌化学预防靶点和疗法的发现。