With the improvement of living standards in recent years, the incidence rate of nonalcoholic fatty liver disease (NAFLD) has kept increasing, with 15%-30% in general population and 50%-90% in obese population. The "second-hit" theory has been widely recognized as the pathogenesis of NAFLD. In-depth studies have found that intestinal flora imbalance may promote the progression of NAFLD by increasing energy absorption in the body, damaging intestinal mucosal barrier, and producing large amounts of toxic metabolites, which provides a new direction for exploring the pathogenesis of NAFLD and effective therapies. This article reviews the role of intestinal flora imbalance in the development and progression of NAFLD.
近年来，随着生活水平的提高，非酒精性脂肪性肝病（NAFLD）发病率逐渐上升，普通人群发病率为15%～30%，肥胖患者发病率达50%～90%。关于NAFLD的致病机制，"二次打击"学说已得到广泛认可。随着研究深入，人们发现肠道菌群失调可通过增加机体能量吸收、破坏肠黏膜屏障、产生大量毒性代谢产物等方式促进NAFLD的进展。这为揭示NAFLD的发病机制、探索有效治疗方法提供了新切入点。据此，就肠道菌群失调在NAFLD发生、发展过程中的作用做一简要概述。.
Keywords: Fatty liver; Gut microbiome; Intestinal permeability; Metabolism.