| RRC ID |
69850
|
| 著者 |
Yoshito Minami, Atsushi Hoshino, Yusuke Higuchi, Masahide Hamaguchi, Yusaku Kaneko, Yuhei Kirita, Shunta Taminishi, Akiyuki Taruno, Michiaki Fukui, Zoltan Arany, Satoaki Matoba
|
| タイトル |
Liver lipophagy ameliorates nonalcoholic steatohepatitis through lysosomal lipid exocytosis
|
| Abstract |
Nonalcoholic steatohepatitis (NASH) is a progressive disorder with aberrant lipid accumulation and subsequent inflammatory and profibrotic response. Therapeutic efforts at lipid reduction via increasing cytoplasmic lipolysis unfortunately worsens hepatitis due to toxicity of liberated fatty acid. An alternative approach could be lipid reduction through autophagic disposal, i.e., lipophagy. We engineered a synthetic adaptor protein to induce lipophagy, combining a lipid droplet-targeting signal with optimized LC3-interacting domain. Activating hepatocyte lipophagy in vivo strongly mitigated both steatosis and hepatitis in a diet-induced mouse NASH model. Mechanistically, activated lipophagy promoted the excretion of lipid from hepatocytes via lysosomal exocytosis, thereby suppressing harmful intracellular accumulation of nonesterified fatty acid. A high-content compound screen identified alpelisib and digoxin, clinically-approved compounds, as effective activators of lipophagy. Administration of alpelisib or digoxin in vivo strongly inhibited the transition to steatohepatitis. These data thus identify lipophagy as a promising therapeutic approach to prevent NASH progression.
|
| DOI |
10.1101/2022.02.22.481456
|
| リソース情報 |
| 実験動物マウス |
RBRC02975 |
