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Comparative Proteomic Analysis of Human Liver Tissue and Isolated Hepatocytes with a Focus on Proteins Determining Drug Exposure
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Upper Abdominal Surgery.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
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2015 (English)In: Journal of Proteome Research, ISSN 1535-3893, E-ISSN 1535-3907, Vol. 14, no 8, 3305-3314 p.Article in journal (Refereed) Published
Abstract [en]

Freshly isolated human hepatocytes are considered the gold standard for in vitro studies of liver functions, including drug transport, metabolism, and toxicity. For accurate predictions of the in vivo outcome, the isolated hepatocytes should reflect the phenotype of their in vivo counterpart, i.e., hepatocytes in human liver tissue. Here, we quantified and compared the membrane proteomes of freshly isolated hepatocytes and human liver tissue using a label-free shotgun proteomics approach. A total of 5144 unique proteins were identified, spanning over 6 orders of magnitude in abundance. There was a good global correlation in protein abundance. However, the expression of many plasma membrane proteins was lower in the isolated hepatocytes than in the liver tissue. This included transport proteins that determine hepatocyte exposure to many drugs and endogenous compounds. Pathway analysis of the differentially expressed proteins confirmed that hepatocytes are exposed to oxidative stress during isolation and suggested that plasma membrane proteins were degraded via the protein ubiquitination pathway. Finally, using pitavastatin as an example, we show how protein quantifications can improve in vitro predictions of in vivo liver clearance. We tentatively conclude that our data set will be a useful resource for improved hepatocyte predictions of the in vivo outcome.

Place, publisher, year, edition, pages
2015. Vol. 14, no 8, 3305-3314 p.
Keyword [en]
quantitative proteomics, total protein approach, oxidative stress, human hepatocytes, membrane proteome, ADME proteins, CYP enzymes, UGT enzymes, drug transporters, in vitro-in vivo extrapolation
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-261985DOI: 10.1021/acs.jproteome.5b00334ISI: 000359394000025PubMedID: 26167961OAI: oai:DiVA.org:uu-261985DiVA: diva2:852154
Funder
Swedish Research Council, 2822
Available from: 2015-09-08 Created: 2015-09-07 Last updated: 2017-12-04Bibliographically approved

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Vildhede, AnnaNoren, AgnetaKarlgren, MariaArtursson, Per

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Department of PharmacyUpper Abdominal SurgeryScience for Life Laboratory, SciLifeLab
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