Scholarlink

<p>Metabolic dysfunction-associated steatotic liver disease (MASLD) is a common metabolic disorder characterized by the abnormal accumulation of fat in the liver. ATP6V1B2, an essential subunit of the vacuolar ATPase (V-ATPase) complex, plays a pivotal role in its function and assembly. Despite its importance, the regulatory role of ATP6V1B2 and its molecular mechanism in MASLD progression remain poorly understood. In this study, we observed a significant reduction in ATP6V1B2 expression in the serum of MASLD patients. Experimental results demonstrated that inhibiting ATP6V1B2 expression in liver cells led to increased lipid accumulation, aggravated oxidative stress, upregulation of fatty acid synthase (FASN), and impaired autophagic activity. Further investigation revealed that ATP6V1B2 promotes the lysosomal degradation of FASN by maintaining the acidic environment of lysosomes, thereby playing a crucial role in lipid metabolism regulation. These findings uncover the critical mechanism by which ATP6V1B2 contributes to MASLD development and suggest that restoring its function could offer novel therapeutic strategies for treating this condition.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

ATP6V1B2 alleviates hepatic steatosis by promoting lysosomal acidification in hepatocytes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月24日

查看全文
  • Ruizi Xu,
  • Fuji Yang,
  • Zhuan Zhang,
  • Fang Cheng,
  • Shihui Li,
  • Yongmin Yan,
  • Yanan Wang,
  • Jing Zhou

摘要

Metabolic dysfunction-associated steatotic liver disease (MASLD) is a common metabolic disorder characterized by the abnormal accumulation of fat in the liver. ATP6V1B2, an essential subunit of the vacuolar ATPase (V-ATPase) complex, plays a pivotal role in its function and assembly. Despite its importance, the regulatory role of ATP6V1B2 and its molecular mechanism in MASLD progression remain poorly understood. In this study, we observed a significant reduction in ATP6V1B2 expression in the serum of MASLD patients. Experimental results demonstrated that inhibiting ATP6V1B2 expression in liver cells led to increased lipid accumulation, aggravated oxidative stress, upregulation of fatty acid synthase (FASN), and impaired autophagic activity. Further investigation revealed that ATP6V1B2 promotes the lysosomal degradation of FASN by maintaining the acidic environment of lysosomes, thereby playing a crucial role in lipid metabolism regulation. These findings uncover the critical mechanism by which ATP6V1B2 contributes to MASLD development and suggest that restoring its function could offer novel therapeutic strategies for treating this condition.