A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity
Extracellular vesicles (EVs) are emerging mediators of intercellular communication in nonalcoholic steatohepatitis (NASH). Palmitate, a lipotoxic saturated fatty acid, activates hepatocellular endoplasmic reticulum stress, which has been demonstrated to be important in NASH pathogenesis, including i...
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Frontiers Media S.A.
2021
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oai:doaj.org-article:31c87ecc88594ccfa74665a7ab1cb6912021-11-04T07:48:38ZA Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity2296-634X10.3389/fcell.2021.735001https://doaj.org/article/31c87ecc88594ccfa74665a7ab1cb6912021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fcell.2021.735001/fullhttps://doaj.org/toc/2296-634XExtracellular vesicles (EVs) are emerging mediators of intercellular communication in nonalcoholic steatohepatitis (NASH). Palmitate, a lipotoxic saturated fatty acid, activates hepatocellular endoplasmic reticulum stress, which has been demonstrated to be important in NASH pathogenesis, including in the release of EVs. We have previously demonstrated that the release of palmitate-stimulated EVs is dependent on the de novo synthesis of ceramide, which is trafficked by the ceramide transport protein, STARD11. The trafficking of ceramide is a critical step in the release of lipotoxic EVs, as cells deficient in STARD11 do not release palmitate-stimulated EVs. Here, we examined the hypothesis that protein cargoes are trafficked to lipotoxic EVs in a ceramide-dependent manner. We performed quantitative proteomic analysis of palmitate-stimulated EVs in control and STARD11 knockout hepatocyte cell lines. Proteomics was performed on EVs isolated by size exclusion chromatography, ultracentrifugation, and density gradient separation, and EV proteins were measured by mass spectrometry. We also performed human EV proteomics from a control and a NASH plasma sample, for comparative analyses with hepatocyte-derived lipotoxic EVs. Size exclusion chromatography yielded most unique EV proteins. Ceramide-dependent lipotoxic EVs contain damage-associated molecular patterns and adhesion molecules. Haptoglobin, vascular non-inflammatory molecule-1, and insulin-like growth factor-binding protein complex acid labile subunit were commonly detected in NASH and hepatocyte-derived ceramide-dependent EVs. Lipotoxic EV proteomics provides novel candidate proteins to investigate in NASH pathogenesis and as diagnostic biomarkers for hepatocyte-derived EVs in NASH patients.Yasuhiko NakaoYasuhiko NakaoMasanori FukushimaMasanori FukushimaAmy S. MauerChieh-Yu LiaoAnya FerrisAnya FerrisDebanjali DasguptaDebanjali DasguptaCarrie Jo HeppelmannPatrick M. VanderboomPatrick M. VanderboomMayank SaraswatMayank SaraswatMayank SaraswatAkhilesh PandeyAkhilesh PandeyAkhilesh PandeyAkhilesh PandeyK. Sreekumaran NairAlina M. AllenKazuhiko NakaoHarmeet MalhiFrontiers Media S.A.articleexosomemicrovesicleDAMPhepatocyteStAR-related lipid transfer domain 11Biology (General)QH301-705.5ENFrontiers in Cell and Developmental Biology, Vol 9 (2021) |
| institution |
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| collection |
DOAJ |
| language |
EN |
| topic |
exosome microvesicle DAMP hepatocyte StAR-related lipid transfer domain 11 Biology (General) QH301-705.5 |
| spellingShingle |
exosome microvesicle DAMP hepatocyte StAR-related lipid transfer domain 11 Biology (General) QH301-705.5 Yasuhiko Nakao Yasuhiko Nakao Masanori Fukushima Masanori Fukushima Amy S. Mauer Chieh-Yu Liao Anya Ferris Anya Ferris Debanjali Dasgupta Debanjali Dasgupta Carrie Jo Heppelmann Patrick M. Vanderboom Patrick M. Vanderboom Mayank Saraswat Mayank Saraswat Mayank Saraswat Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey K. Sreekumaran Nair Alina M. Allen Kazuhiko Nakao Harmeet Malhi A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| description |
Extracellular vesicles (EVs) are emerging mediators of intercellular communication in nonalcoholic steatohepatitis (NASH). Palmitate, a lipotoxic saturated fatty acid, activates hepatocellular endoplasmic reticulum stress, which has been demonstrated to be important in NASH pathogenesis, including in the release of EVs. We have previously demonstrated that the release of palmitate-stimulated EVs is dependent on the de novo synthesis of ceramide, which is trafficked by the ceramide transport protein, STARD11. The trafficking of ceramide is a critical step in the release of lipotoxic EVs, as cells deficient in STARD11 do not release palmitate-stimulated EVs. Here, we examined the hypothesis that protein cargoes are trafficked to lipotoxic EVs in a ceramide-dependent manner. We performed quantitative proteomic analysis of palmitate-stimulated EVs in control and STARD11 knockout hepatocyte cell lines. Proteomics was performed on EVs isolated by size exclusion chromatography, ultracentrifugation, and density gradient separation, and EV proteins were measured by mass spectrometry. We also performed human EV proteomics from a control and a NASH plasma sample, for comparative analyses with hepatocyte-derived lipotoxic EVs. Size exclusion chromatography yielded most unique EV proteins. Ceramide-dependent lipotoxic EVs contain damage-associated molecular patterns and adhesion molecules. Haptoglobin, vascular non-inflammatory molecule-1, and insulin-like growth factor-binding protein complex acid labile subunit were commonly detected in NASH and hepatocyte-derived ceramide-dependent EVs. Lipotoxic EV proteomics provides novel candidate proteins to investigate in NASH pathogenesis and as diagnostic biomarkers for hepatocyte-derived EVs in NASH patients. |
| format |
article |
| author |
Yasuhiko Nakao Yasuhiko Nakao Masanori Fukushima Masanori Fukushima Amy S. Mauer Chieh-Yu Liao Anya Ferris Anya Ferris Debanjali Dasgupta Debanjali Dasgupta Carrie Jo Heppelmann Patrick M. Vanderboom Patrick M. Vanderboom Mayank Saraswat Mayank Saraswat Mayank Saraswat Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey K. Sreekumaran Nair Alina M. Allen Kazuhiko Nakao Harmeet Malhi |
| author_facet |
Yasuhiko Nakao Yasuhiko Nakao Masanori Fukushima Masanori Fukushima Amy S. Mauer Chieh-Yu Liao Anya Ferris Anya Ferris Debanjali Dasgupta Debanjali Dasgupta Carrie Jo Heppelmann Patrick M. Vanderboom Patrick M. Vanderboom Mayank Saraswat Mayank Saraswat Mayank Saraswat Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey Akhilesh Pandey K. Sreekumaran Nair Alina M. Allen Kazuhiko Nakao Harmeet Malhi |
| author_sort |
Yasuhiko Nakao |
| title |
A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| title_short |
A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| title_full |
A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| title_fullStr |
A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| title_full_unstemmed |
A Comparative Proteomic Analysis of Extracellular Vesicles Associated With Lipotoxicity |
| title_sort |
comparative proteomic analysis of extracellular vesicles associated with lipotoxicity |
| publisher |
Frontiers Media S.A. |
| publishDate |
2021 |
| url |
https://doaj.org/article/31c87ecc88594ccfa74665a7ab1cb691 |
| work_keys_str_mv |
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