Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

Logo MUG-Forschungsportal

Gewählte Publikation:

SHR Neuro Krebs Kardio Lipid

Obrowsky, S; Chandak, PG; Patankar, JV; Pfeifer, T; Povoden, S; Schreiber, R; Haemmerle, G; Levak-Frank, S; Kratky, D.
Cholesteryl ester accumulation and accelerated cholesterol absorption in intestine-specific hormone sensitive lipase-null mice.
Biochim Biophys Acta. 2012; 1821(11):1406-1414 [OPEN ACCESS]
Web of Science PubMed PUBMED Central FullText FullText_MUG

 

Autor/innen der Med Uni Graz:
Kratky Dagmar
Levak Sanja
Obrowsky Sascha
Patankar Jay Vasant
Rainer Silvia
Altmetrics:

Dimensions Citations:

Plum Analytics:
Number of Figures: 7
| | | | | | |
Abstract:
Hormone sensitive lipase (HSL) regulates the hydrolysis of acylglycerols and cholesteryl esters (CE) in various cells and organs, including enterocytes of the small intestine. The physiological role of this enzyme in enterocytes, however, stayed elusive. In the present study we generated mice lacking HSL exclusively in the small intestine (HSLiKO) to investigate the impact of HSL deficiency on intestinal lipid metabolism and the consequences on whole body lipid homeostasis. Chow diet-fed HSLiKO mice showed unchanged plasma lipid concentrations. In addition, feeding with high fat/high cholesterol (HF/HC) diet led to unaltered triglyceride but increased plasma cholesterol concentrations and CE accumulation in the small intestine. The same effect was observed after an acute cholesterol load. Gavaging of radioactively labeled cholesterol resulted in increased abundance of radioactivity in plasma, liver and small intestine of HSLiKO mice 4h post-gavaging. However, cholesterol absorption determined by the fecal dual-isotope ratio method revealed no significant difference, suggesting that HSLiKO mice take up the same amount of cholesterol but in an accelerated manner. mRNA expression levels of genes involved in intestinal cholesterol transport and esterification were unchanged but we observed downregulation of HMG-CoA reductase and synthase and consequently less intestinal cholesterol biosynthesis. Taken together our study demonstrates that the lack of intestinal HSL leads to CE accumulation in the small intestine, accelerated cholesterol absorption and decreased cholesterol biosynthesis, indicating that HSL plays an important role in intestinal cholesterol homeostasis. Copyright © 2012 Elsevier B.V. All rights reserved.
Find related publications in this database (using NLM MeSH Indexing)
Animals -
Blotting, Western -
Cholesterol - metabolism
Cholesterol Esters - metabolism
Female -
Integrases - metabolism
Intestinal Absorption -
Lipids - blood
Male -
Mice -
Mice, Knockout -
RNA, Messenger - genetics
Real-Time Polymerase Chain Reaction -
Reverse Transcriptase Polymerase Chain Reaction -
Sterol Esterase - physiology
Triglycerides - metabolism

Find related publications in this database (Keywords)
Hormone sensitive lipase
Cholesterol absorption
Triglyceride absorption
Intestine-specific HSL-deficient mice
Small intestine
© Meduni Graz Impressum