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However, the link between lipid droplets and cell activation is unknown. This study compared the dynamics of lipid droplet-associated protein expression between activated and reverted stellate cells. Reversion of the activated human stellate cell line LX-2 and inhibition of primary mouse stellate cell activation were induced by retinol or oleic acid, which resulted in larger lipid droplets and the downregulation of cell activation markers. Quantitative proteomics and immunoblotting were performed to compare lipid-droplet protein profiles between activated and reverted LX-2 cells. Compared to expression in activated cells, 50 lipid-droplet proteins were upregulated, whereas 28 were downregulated upon reversion. ATG2A was significantly enriched in lipid droplets of retinol\/oleic acid-treated LX-2 cells and quiescent primary stellate cells. Reduced expression of \u03b1-SMA, increased expression of perilipin-3, enlarged lipid droplets, and suppression of autophagic flux were observed in ATG2A-deficient LX2 cells. Lipid-droplet protein profile changes during the reversion of activated stellate cells might provide new insights into the molecular mechanisms linking lipid droplets to liver fibrosis. ATG2A could represent a potential new drug target for hepatic fibrosis.<\/jats:p>","DOI":"10.1038\/s41598-018-27686-6","type":"journal-article","created":{"date-parts":[[2018,6,12]],"date-time":"2018-06-12T09:03:28Z","timestamp":1528794208000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":48,"title":["In vitro inhibition of hepatic stellate cell activation by the autophagy-related lipid droplet protein ATG2A"],"prefix":"10.1038","volume":"8","author":[{"given":"Yun","family":"Hong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sirui","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jifeng","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youming","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2018,6,18]]},"reference":[{"key":"27686_CR1","doi-asserted-by":"publisher","first-page":"445","DOI":"10.20524\/aog.2016.0046","volume":"29","author":"Z Almpanis","year":"2016","unstructured":"Almpanis, Z., Demonakou, M. & Tiniakos, D. 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