非酒精性脂肪性肝病(NAFLD)/非酒精性脂肪性肝炎(NASH)相关肝纤维化:机制、治疗与预防
Non-alcoholic fatty liver disease (NAFLD)/non-alcoholic steatohepatitis (NASH)-related liver fibrosis: mechanisms, treatment and prevention.
作者信息
Tacke Frank, Weiskirchen Ralf
机构信息
Department of Hepatology and Gastroenterology, Charité University Medicine Berlin, Berlin, Germany.
Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), RWTH University Hospital Aachen, Aachen, Germany.
出版信息
Ann Transl Med. 2021 Apr;9(8):729. doi: 10.21037/atm-20-4354.
Liver fibrosis is the excessive expression and accumulation of extracellular matrix proteins in the liver. Fibrotic scarring occurs as the consequence of chronic injury and inflammation. While the successful treatment of hepatitis B and C reduced the burden of liver disease related to viral hepatitis, non-alcoholic fatty liver disease (NAFLD) or non-alcoholic steatohepatitis (NASH) are nowadays the leading causes of hepatic fibrosis worldwide. Although basic research activities have significantly advanced our understanding of the molecular disease pathogenesis, the present therapeutic options for fibrosis are still limited. In advanced disease stages, liver transplantation often remains the only curative treatment. This highlights the necessity of preventive strategies to avoid complications of fibrosis, particularly cirrhosis, portal hypertension and liver cancer. Lifestyle modifications (weight loss, exercise, healthy diet) are the basis for prevention and treatment of NAFLD-associated fibrosis. In the present review, we discuss recent advances in antifibrotic prevention and therapy. In particular, we review the current concepts for antifibrotic drug candidates in the treatment of NAFLD and NASH. While some compounds aim at reverting pathogenic liver metabolism, an alternative approach is to disconnect the injury (e.g., NAFLD) from inflammation and/or fibrosis. Investigational drugs typically target metabolic pathways, insulin resistance, hepatocyte death, inflammatory cell recruitment or activation, the gut-liver axis, matrix expression or matrix turnover. While several promising drug candidates failed in phase 2 or 3 clinical trials (including elafibranor, emricasan and selonsertib), promising results with the farnesoid X receptor agonist obeticholic acid, the pan-PPAR agonist lanifibranor and the chemokine receptor CCR2/CCR5 inhibitor cenicriviroc support the expectation of an effective pharmacological therapy for liver fibrosis in the near future. Tackling NAFLD-associated fibrosis from different directions by combinatorial drug treatment and effective lifestyle changes hold the greatest prospects.
肝纤维化是肝脏中细胞外基质蛋白的过度表达和积累。纤维化瘢痕形成是慢性损伤和炎症的结果。虽然成功治疗乙型和丙型肝炎减轻了与病毒性肝炎相关的肝脏疾病负担,但如今非酒精性脂肪性肝病(NAFLD)或非酒精性脂肪性肝炎(NASH)是全球肝纤维化的主要原因。尽管基础研究活动极大地增进了我们对该分子疾病发病机制的理解,但目前针对纤维化的治疗选择仍然有限。在疾病晚期,肝移植往往仍是唯一的治愈性治疗方法。这凸显了采取预防策略以避免纤维化并发症(尤其是肝硬化、门静脉高压和肝癌)的必要性。生活方式的改变(减肥、运动、健康饮食)是预防和治疗与NAFLD相关纤维化的基础。在本综述中,我们讨论了抗纤维化预防和治疗的最新进展。特别是,我们回顾了目前用于治疗NAFLD和NASH的抗纤维化候选药物的概念。虽然一些化合物旨在逆转致病性肝脏代谢,但另一种方法是将损伤(如NAFLD)与炎症和/或纤维化分离。研究药物通常针对代谢途径、胰岛素抵抗、肝细胞死亡、炎性细胞募集或激活、肠-肝轴、基质表达或基质周转。虽然几种有前景的候选药物在2期或3期临床试验中失败了(包括阿非莫司、恩卡司他和塞洛西布),但法尼酯X受体激动剂奥贝胆酸、泛PPAR激动剂拉尼菲诺和趋化因子受体CCR2/CCR5抑制剂西尼夫罗克的 promising results支持了在不久的将来对肝纤维化进行有效药物治疗的期望。通过联合药物治疗和有效的生活方式改变从不同方向应对与NAFLD相关的纤维化具有最大的前景。