Adnan Said, Division of Gastroenterology and Hepatology, Department of Medicine, Transplant Hepatology, School of Medicine and Public Health, University of Wisconsin, Madison, WI 53705, United States.
World J Gastroenterol. 2013 Dec 28;19(48):9146-55. doi: 10.3748/wjg.v19.i48.9146.
Non-alcoholic fatty liver disease (NAFLD) is one of the most prevalent causes of chronic liver disease worldwide. In the last decade it has become the third most common indication for liver transplantation in the United States. Increasing prevalence of NAFLD in the general population also poses a risk to organ donation, as allograft steatosis can be associated with non-function of the graft. Post-transplant survival is comparable between NAFLD and non-NAFLD causes of liver disease, although long term outcomes beyond 10 year are lacking. NAFLD can recur in the allograft frequently although thus far post transplant survival has not been impacted. De novo NAFLD can also occur in the allograft of patients transplanted for non-NAFLD liver disease. Predictors for NAFLD post-transplant recurrence include obesity, hyperlipidemia and diabetes as well as steroid dose after liver transplantation. A polymorphism in PNPLA3 that mediates triglyceride hydrolysis and is linked to pre-transplant risk of obesity and NAFLD has also been linked to post transplant NAFLD risk. Although immunosuppression side effects potentiate obesity and the metabolic syndrome, studies of immunosuppression modulation and trials of specific immunosuppression regimens post-transplant are lacking in this patient population. Based on pre-transplant data, sustained weight loss through diet and exercise is the most effective therapy for NAFLD. Other agents occasionally utilized in NAFLD prior to transplantation include vitamin E and insulin-sensitizing agents. Studies of these therapies are lacking in the post-transplant population. A multimodality and multidisciplinary approach to treatment should be utilized in management of post-transplant NAFLD.
非酒精性脂肪性肝病(NAFLD)是全球最常见的慢性肝病病因之一。在过去十年中,它已成为美国第三大常见的肝移植适应证。NAFLD 在普通人群中的患病率不断增加,也给器官捐献带来了风险,因为移植物脂肪变性可能与移植物功能丧失有关。NAFLD 和非 NAFLD 肝病患者的肝移植后存活率相当,尽管缺乏 10 年以上的长期结果。NAFLD 可在移植物中频繁复发,但迄今为止,移植后存活率并未受到影响。在因非 NAFLD 肝病而接受移植的患者中,新发生的 NAFLD 也可发生在移植物中。移植后 NAFLD 复发的预测因素包括肥胖、高脂血症和糖尿病以及肝移植后类固醇剂量。介导甘油三酯水解并与肥胖和 NAFLD 术前风险相关的 PNPLA3 多态性也与移植后 NAFLD 风险相关。尽管免疫抑制剂的副作用会加剧肥胖和代谢综合征,但在这一患者群体中,缺乏针对免疫抑制调节的研究和特定免疫抑制方案的移植后试验。根据术前数据,通过饮食和运动来维持体重减轻是治疗 NAFLD 的最有效方法。在移植前偶尔用于治疗 NAFLD 的其他药物包括维生素 E 和胰岛素增敏剂。在移植后人群中缺乏这些治疗方法的研究。应采用多模式和多学科方法来治疗移植后 NAFLD。