Purpose Of Review: Regulation of cholesterol homeostasis is a complex interplay of a multitude of metabolic pathways situated in different organs. The liver plays a central role and has received most attention of the research community. In this review, we discuss recent progress in the understanding of the emerging role of the intestine in cholesterol transport.
Recent Findings: In recent years, insight in the transport systems that mediate intestinal cholesterol excretion has deepened considerably. Evidence is emerging that the proximal part of the small intestine is able to secrete cholesterol actively, a pathway called transintestinal cholesterol efflux (TICE). In mice, TICE accounts for up to 70% of fecal neutral sterol excretion.
Summary: The small intestine plays a significant role in the regulation of body cholesterol homeostasis. Active processes control both absorption and excretion of the sterol and the pathways involved are being elucidated. TICE might provide an attractive target for therapy aiming at reduction of atherosclerosis.
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http://dx.doi.org/10.1097/MOL.0b013e3283395e45 | DOI Listing |
Int J Mol Sci
October 2024
Departmental Section of Physiology, Pharmacy School, Complutense University of Madrid, 28040 Madrid, Spain.
Cell Metab
January 2025
Translational Medicine Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China; Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision, and Brain Health), National Key Laboratory of Macromolecular Drugs and Large-scale Preparation, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China. Electronic address:
Bile acid (BA) homeostasis is vital for various physiological processes, whereas its disruption underlies cholestasis. The farnesoid X receptor (FXR) is a master regulator of BA homeostasis via the ileal fibroblast growth factor (FGF)15/19 endocrine pathway, responding to postprandial or abnormal transintestinal BA flux. However, the de novo paracrine signal mediator of hepatic FXR, which governs the extent of BA synthesis within the liver in non-postprandial or intrahepatic cholestatic conditions, remains unknown.
View Article and Find Full Text PDFFoods
June 2024
Departmental Section of Physiology, Pharmacy School, Complutense University of Madrid, 28040 Madrid, Spain.
Silicon included in a restructured meat (RM) matrix (Si-RM) as a functional ingredient has been demonstrated to be a potential bioactive antidiabetic compound. However, the jejunal and hepatic molecular mechanisms by which Si-RM exerts its cholesterol-lowering effects remain unclear. Male Wistar rats fed an RM included in a high-saturated-fat high-cholesterol diet (HSFHCD) combined with a low dose of streptozotocin plus nicotinamide injection were used as late-stage type 2 diabetes mellitus (T2DM) model.
View Article and Find Full Text PDFFood Res Int
January 2024
College of Public Health, Zhengzhou University, Zhengzhou, China; Food Laboratory of Zhongyuan, Luohe, China; Nutrition and Health Food Research Institute, Zhengzhou University, Zhengzhou, China. Electronic address:
Fisetin, a dietary polyphenol abundantly found in strawberries, exhibits a broad spectrum of health-promoting activities, including antihyperlipidemic effects. This study aimed to investigate the regulatory effect of fisetin on cholesterol elimination through novel transintestinal cholesterol excretion (TICE) pathway. A hypercholesterolemic mouse model and human colon epithelial cancer cell line Caco-2 were utilized to conduct the study.
View Article and Find Full Text PDFAdv Exp Med Biol
December 2023
Lipids, Oxidation and Cell Biology Team, Laboratory of Immunology (LIM19), Heart Institute (InCor), Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Brazil.
Sitosterolemia is a rare genetic lipid disorder, mainly characterized by the accumulation of dietary xenosterols in plasma and tissues. It is caused by inactivating mutations in either ABCG5 or ABCG8 subunits, a subfamily-G ATP-binding cassette (ABCG) transporters. ABCG5/G8 encodes a pair of ABC half transporters that form a heterodimer (G5G8).
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