Disruption of tumor suppressor gene Hint1 leads to remodeling of the lipid metabolic phenotype of mouse liver

Beyoglu, Diren; Krausz, K. W.; Martin, Juliette; Maurhofer, Olivier; Dorow, J.; Ceglarek, U.; Gonzalez, F. J.; Dufour, Jean-François; Idle, Jeffrey (2014). Disruption of tumor suppressor gene Hint1 leads to remodeling of the lipid metabolic phenotype of mouse liver. Journal of lipid research, 55(11), pp. 2309-2319. American Society for Biochemistry and Molecular Biology ASBMB 10.1194/jlr.M050682

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A lipidomic and metabolomic investigation of serum and liver from mice was performed to gain insight into the tumor suppressor gene Hint1. A major reprogramming of lipid homeostasis was found in both serum and liver of Hint1-null (Hint(-/-)) mice, with significant changes in the levels of many lipid molecules, as compared with gender-, age-, and strain-matched WT mice. In the Hint1(-/-) mice, serum total and esterified cholesterol were reduced 2.5-fold, and lysophosphatidylcholines (LPCs) and lysophosphatidic acids were 10-fold elevated in serum, with a corresponding fall in phosphatidylcholines (PCs). In the liver, MUFAs and PUFAs, including arachidonic acid (AA) and its metabolic precursors, were also raised, as was mRNA encoding enzymes involved in AA de novo synthesis. There was also a significant 50% increase in hepatic macrophages in the Hint1(-/-) mice. Several hepatic ceramides and acylcarnitines were decreased in the livers of Hint1(-/-) mice. The changes in serum LPCs and PCs were neither related to hepatic phospholipase A2 activity nor to mRNAs encoding lysophosphatidylcholine acetyltransferases 1-4. The lipidomic phenotype of the Hint1(-/-) mouse revealed decreased inflammatory eicosanoids with elevated proliferative mediators that, combined with decreased ceramide apoptosis signaling molecules, may contribute to the tumor suppressor activity of Hint1.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Hepatologie
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Hepatologie

04 Faculty of Medicine > Department of Gastro-intestinal, Liver and Lung Disorders (DMLL) > Clinic of Visceral Surgery and Medicine > Hepatology

UniBE Contributor:

Beyoglu, Diren; Martin, Juliette; Maurhofer, Olivier; Dufour, Jean-François and Idle, Jeffrey

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0022-2275

Publisher:

American Society for Biochemistry and Molecular Biology ASBMB

Language:

English

Submitter:

Lilian Karin Smith-Wirth

Date Deposited:

16 Apr 2015 13:00

Last Modified:

06 Nov 2015 09:38

Publisher DOI:

10.1194/jlr.M050682

PubMed ID:

25193995

Uncontrolled Keywords:

lipidomics, metabolomics, mass spectrometry, carcinogenesis, cholesterol, phospholipids, eicosanoids, proliferation, apoptosis

BORIS DOI:

10.7892/boris.66931

URI:

https://boris.unibe.ch/id/eprint/66931

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