Novel Role for Matrix Metalloproteinase 9 in Modulation of Cholesterol Metabolism

Autor: Roger Lijnen, János G. Filep, Gérard Lambeau, Dickson Leung, Vesna Brglez, Jean E. Vance, Samuel Hernandez-Anzaldo, Carlos Fernandez-Patron, Zamaneh Kassiri, Dennis E. Vance, Bianca Hemmeryckx
Rok vydání: 2016
Předmět:
Male
0301 basic medicine
plasma phospholipase A2
medicine.medical_specialty
matrix metalloproteinase
Indoles
Phospholipase A2 Inhibitors
Coronary Artery Disease
Acetates
030204 cardiovascular system & hematology
liver
Cholesterol 7 alpha-hydroxylase
Mice
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
Phospholipase A2
Internal medicine
lipid metabolism
medicine
Animals
Cholesterol 7-alpha-Hydroxylase
Liver X receptor
Original Research
Heart Failure
Mice
Knockout
biology
business.industry
Cholesterol
cholesterol
Lipid metabolism
Keto Acids
Phospholipases A2
030104 developmental biology
Endocrinology
Gene Expression Regulation
Intestinal Absorption
Matrix Metalloproteinase 9
chemistry
Intestinal cholesterol absorption
biology.protein
Cholestanetriol 26-Monooxygenase
Varespladib
Sterol regulatory element-binding protein 2
atherosclerosis
Cardiology and Cardiovascular Medicine
business
Sterol Regulatory Element Binding Protein 2
Zdroj: Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
ISSN: 2047-9980
DOI: 10.1161/jaha.116.004228
Popis: Background The development of atherosclerosis is strongly linked to disorders of cholesterol metabolism. Matrix metalloproteinases ( MMP s) are dysregulated in patients and animal models with atherosclerosis. Whether systemic MMP activity influences cholesterol metabolism is unknown. Methods and Results We examined MMP ‐9–deficient ( Mmp9 −/− ) mice and found them to have abnormal lipid gene transcriptional responses to dietary cholesterol supplementation. As opposed to Mmp9 +/+ (wild‐type) mice, Mmp9 −/− mice failed to decrease the hepatic expression of sterol regulatory element binding protein 2 pathway genes, which control hepatic cholesterol biosynthesis and uptake. Furthermore, Mmp9 −/− mice failed to increase the expression of genes encoding the rate‐limiting enzymes in biliary cholesterol excretion (eg, Cyp7a and Cyp27a ). In contrast, MMP ‐9 deficiency did not impair intestinal cholesterol absorption, as shown by the 14 C‐cholesterol and 3 H‐sitostanol absorption assay. Similar to our earlier study on Mmp2 −/− mice, we observed that Mmp9 −/− mice had elevated plasma secreted phospholipase A 2 activity. Pharmacological inhibition of systemic circulating secreted phospholipase A 2 activity (with varespladib) partially normalized the hepatic transcriptional responses to dietary cholesterol in Mmp9 −/− mice. Functional studies with mice deficient in other MMP s suggested an important role for the MMP system, as a whole, in modulation of cholesterol metabolism. Conclusions Our results show that MMP ‐9 modulates cholesterol metabolism, at least in part, through a novel MMP ‐9–plasma secreted phospholipase A 2 axis that affects the hepatic transcriptional responses to dietary cholesterol. Furthermore, the data suggest that dysregulation of the MMP system can result in metabolic disorder, which could lead to atherosclerosis and coronary heart disease.
Databáze: OpenAIRE
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