Evidence-based clinical practice guidelines for nonalcoholic fatty liver disease/nonalcoholic steatohepatitis 2020.

Abstract

Nonalcoholic fatty liver disease (NAFLD) has become a serious public health issue not only in Western countries but also in Japan. Within the wide spectrum of NAFLD, nonalcoholic steatohepatitis (NASH) is a progressive form of disease that often develops into liver cirrhosis and increases the risk of hepatocellular carcinoma (HCC). While a definite diagnosis of NASH requires liver biopsy to confirm the presence of hepatocyte ballooning, hepatic fibrosis is the most important prognostic factor in NAFLD. With so many NAFLD patients, it is essential to have an effective screening method for NAFLD with hepatic fibrosis. As HCC with non-viral liver disease has increased markedly in Japan, effective screening and surveillance of HCC are also urgently needed. The most common death etiology in NAFLD patients is cardiovascular disease event. Gastroenterologists must, therefore, pay close attention to CVD when examining NAFLD patients. In the updated guidelines, we propose screening and follow-up methods for hepatic fibrosis, HCC, and CVD in NAFLD patients. Several drug trials are ongoing for NAFLD/NASH therapy, however, there is currently no specific drug therapy for NAFLD/NASH. In addition to vitamin E and thiazolidinedione derivatives, recent trials have focused on sodium glucose co-transporter 2 (SGLT2) inhibitors and glucagon-like peptide-1 (GLP-1) analogues, and effective therapies are expected to be developed. These practical guidelines for NAFLD/NASH were established by the Japanese Society of Gastroenterology in conjunction with the Japan Society of Hepatology. Clinical evidence reported internationally between 1983 and October 2018 was collected, and each clinical and background question was evaluated using the Grades of Recommendation Assessment, Development and Evaluation (GRADE) system. This English summary pro- vides the core essentials of these clinical practice guidelines, which include the definition and concept, screening systems for hepatic fibrosis, HCC and CVD, and current therapies for NAFLD/NASH in Japan.

• Authors: Katsutoshi Tokushige, Kenichi Ikejima, Masafumi Ono, Yuichiro Eguchi, Yoshihiro Kamada, Yoshito Itoh, Norio Akuta, Masato Yoneda, Motoh Iwasa, Masashi Yoneda, Motoyuki Otsuka, Nobuharu Tamaki, Tomomi Kogiso, Hiroto Miwa, Kazuaki Chayama, Nobuyuki Enomoto, Tooru Shimosegawa, Tetsuo Takehara, Kazuhiko Koike
• Journal: Hepatology research : the official journal of the Japan Society of Hepatology (Hepatol Res) Vol. 51 Issue 10 Pg. 1013-1025 (Oct 2021) ISSN: 1386-6346 [Print] Netherlands
• PMID: 34533266 (Publication Type: Journal Article)
• Copyright: This article has been co-published with permission in Hepatology Research and Journal of Gastroenterology. © 2021 The Authors. The articles are identical except for minor stylistic and spelling differences in keeping with each journal’s style. Either citation can be used when citing this article.