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Sun HJ, Ni ZR, Liu Y, Fu X, Liu SY, Hu JY, Sun QY, Li YC, Hou XH, Zhang JR, Zhu XX, Lu QB. Deficiency of neutral cholesterol ester hydrolase 1 (NCEH1) impairs endothelial function in diet-induced diabetic mice. Cardiovasc Diabetol 2024; 23:138. [PMID: 38664801 PMCID: PMC11046792 DOI: 10.1186/s12933-024-02239-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Neutral cholesterol ester hydrolase 1 (NCEH1) plays a critical role in the regulation of cholesterol ester metabolism. Deficiency of NCHE1 accelerated atherosclerotic lesion formation in mice. Nonetheless, the role of NCEH1 in endothelial dysfunction associated with diabetes has not been explored. The present study sought to investigate whether NCEH1 improved endothelial function in diabetes, and the underlying mechanisms were explored. METHODS The expression and activity of NCEH1 were determined in obese mice with high-fat diet (HFD) feeding, high glucose (HG)-induced mouse aortae or primary endothelial cells (ECs). Endothelium-dependent relaxation (EDR) in aortae response to acetylcholine (Ach) was measured. RESULTS Results showed that the expression and activity of NCEH1 were lower in HFD-induced mouse aortae, HG-exposed mouse aortae ex vivo, and HG-incubated primary ECs. HG exposure reduced EDR in mouse aortae, which was exaggerated by endothelial-specific deficiency of NCEH1, whereas NCEH1 overexpression restored the impaired EDR. Similar results were observed in HFD mice. Mechanically, NCEH1 ameliorated the disrupted EDR by dissociating endothelial nitric oxide synthase (eNOS) from caveolin-1 (Cav-1), leading to eNOS activation and nitric oxide (NO) release. Moreover, interaction of NCEH1 with the E3 ubiquitin-protein ligase ZNRF1 led to the degradation of Cav-1 through the ubiquitination pathway. Silencing Cav-1 and upregulating ZNRF1 were sufficient to improve EDR of diabetic aortas, while overexpression of Cav-1 and downregulation of ZNRF1 abolished the effects of NCEH1 on endothelial function in diabetes. Thus, NCEH1 preserves endothelial function through increasing NO bioavailability secondary to the disruption of the Cav-1/eNOS complex in the endothelium of diabetic mice, depending on ZNRF1-induced ubiquitination of Cav-1. CONCLUSIONS NCEH1 may be a promising candidate for the prevention and treatment of vascular complications of diabetes.
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MESH Headings
- Animals
- Male
- Mice
- Aorta/enzymology
- Aorta/physiopathology
- Aorta/metabolism
- Aorta/drug effects
- Aorta/pathology
- Caveolin 1/metabolism
- Caveolin 1/deficiency
- Caveolin 1/genetics
- Cells, Cultured
- Diabetes Mellitus, Experimental/enzymology
- Diabetes Mellitus, Experimental/physiopathology
- Diet, High-Fat
- Endothelial Cells/enzymology
- Endothelial Cells/metabolism
- Endothelial Cells/drug effects
- Endothelium, Vascular/physiopathology
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/enzymology
- Endothelium, Vascular/drug effects
- Mice, Inbred C57BL
- Mice, Knockout
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/metabolism
- Obesity/enzymology
- Obesity/physiopathology
- Obesity/metabolism
- Signal Transduction
- Sterol Esterase/metabolism
- Sterol Esterase/genetics
- Ubiquitination
- Vasodilation/drug effects
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Affiliation(s)
- Hai-Jian Sun
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Lane, Nanjing, 210009, China.
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
| | - Zhang-Rong Ni
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Yao Liu
- Department of Cardiac Ultrasound, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, Jiangsu, China
| | - Xiao Fu
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Shi-Yi Liu
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Jin-Yi Hu
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Qing-Yi Sun
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Yu-Chao Li
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Xiao-Hui Hou
- Department of Cardiac Ultrasound, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, Jiangsu, China
| | - Ji-Ru Zhang
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
| | - Xue-Xue Zhu
- Department of Physiology, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
- Department of Basic Medicine, Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
| | - Qing-Bo Lu
- Department of Endocrinology, Affiliated Hospital of Jiangnan University, Jiangnan University, Wuxi, 214125, China.
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Chiba T, Ikeda M, Umegaki K, Tomita T. Estrogen-dependent activation of neutral cholesterol ester hydrolase underlying gender difference of atherogenesis in apoE-/- mice. Atherosclerosis 2011; 219:545-51. [PMID: 21944698 DOI: 10.1016/j.atherosclerosis.2011.08.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 08/31/2011] [Accepted: 08/31/2011] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Mechanisms underlying gender difference of atherogenesis were investigated focusing on direct effects of estrogen on the artery. METHODS First, male and female apoE(-/-) mice were fed an atherogenic diet for 16 weeks from 10 weeks of age. Second, female apoE(-/-) mice were ovariectomized (ovx) or sham operated at 8 weeks of age, and 2-weeks afterwards, one-third of each ovx-group received conjugated equine estrogens (CEE) (0, 2.5 or 5.0 μg/day) for 16 weeks. Atherosclerotic lesions were examined after experimental periods. To clarify anti-atherogenic effect of 17β-estradiol (E2) on artery, neutral cholesteryl ester hydrolase (N-CEase) activity in aorta and peritoneal macrophages, and E2-treated J774A.1 cells were measured. RESULTS First, atherosclerotic lesion in female mice was significantly less than male mice without any changes in serum lipids and lipoprotein profile. N-CEase activity in aorta and peritoneal macrophages in female mice was significantly higher than male mice. Second, atherosclerotic lesion in ovx-group was significantly greater than sham-group. CEE-replacement to ovx-group decreased atherosclerotic lesion in a dose-dependent manner. N-CEase activity in aorta and peritoneal macrophages was decreased in ovx-group compared to sham-group, and restored by CEE-replacement in macrophages. To study detailed mechanisms, J774A.1 cells were treated with E2. E2 significantly increased N-CEase activity, and cAMP-dependent protein kinase (A-kinase) type II activity and the protein in cytosol fraction without any changes of total protein of A-kinase type II. CONCLUSION These results suggest that gender difference of atherogenesis is partly accounted for activation of N-CEase through estrogen-dependent translocation of A-kinase type II in macrophages.
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Affiliation(s)
- Tsuyoshi Chiba
- Graduate School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka-shi, Shizuoka 422-8526, Japan.
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Ali YB, Carrière F, Verger R, Petry S, Muller G, Abousalham A. Continuous monitoring of cholesterol oleate hydrolysis by hormone-sensitive lipase and other cholesterol esterases. J Lipid Res 2005; 46:994-1000. [PMID: 15716583 DOI: 10.1194/jlr.m400509-jlr200] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Hormone-sensitive lipase (HSL) contributes importantly to the hydrolysis of cholesteryl ester in steroidogenic tissues, releasing the cholesterol required for adrenal steroidogenesis. HSL has broad substrate specificity, because it hydrolyzes triacylglycerols (TAGs), diacylglycerols, monoacylglycerols, and cholesteryl esters. In this study, we developed a specific cholesterol esterase assay using cholesterol oleate (CO) dispersed in phosphatidylcholine and gum arabic by sonication. To continuously monitor the hydrolysis of CO by HSL, we used the pH-stat technique. For the sake of comparison, the hydrolysis of CO dispersion was also tested using other cholesteryl ester-hydrolyzing enzymes. The specific activities measured on CO were found to be 18, 100, 27, and 3 micromol/min/mg for HSL, cholesterol esterase from Pseudomonas species, Candida rugosa lipase-3, and cholesterol esterase from bovine pancreas, respectively. The activity of HSL on CO is approximately 4- to 5-fold higher than on long-chain TAGs. In contrast, with all other enzymes tested, the rates of TAG hydrolysis were higher than those of CO hydrolysis. The relatively higher turnover of HSL on CO observed in vitro adds further molecular insight on the physiological importance of HSL in cholesteryl ester catabolism in vivo. Thus, HSL could be considered more as a cholesteryl ester hydrolase than as a TAG lipase.
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Affiliation(s)
- Yassine Ben Ali
- Enzymology at Interfaces and Physiology of Lipolysis, Unité Propre de Recherche 9025, Centre National de la Recherche Scientifique, 13402 Marseille Cedex 20, France
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Ng AWK, Lukic T, Pritchard PH, Wasan KM. Development of novel water-soluble phytostanol analogs: disodium ascorbyl phytostanyl phosphates (FM-VP4): preclinical pharmacology, pharmacokinetics and toxicology. CARDIOVASCULAR DRUG REVIEWS 2004; 21:151-68. [PMID: 12931251 DOI: 10.1111/j.1527-3466.2003.tb00113.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
FM-VP4 is a novel inhibitor of cholesterol absorption that has lipid lowering and body weight reducing properties. In vitro and in vivo studies were performed to investigate the lipid-lowering effects, mechanism of action, pharmacokinetics, and toxicity of FM-VP4. FM-VP4 decreased cholesterol accumulation in Caco-2 cells by approximately 50%; its activity appeared to be independent of pancreatic lipase, p-glycoprotein, or cholesterol incorporation in micelles. In animal studies, FM-VP4 was added to the diet or drinking water and the following results were obtained. In gerbils 2% FM-VP4 produced mean 56 and 53% reduction in total cholesterol (TC) after 4 and 8 weeks, respectively. This reduction was entirely due to the loss of the low-density lipoprotein (LDL) pool, which was reduced to undetectable levels at either time point. At 8 weeks, high-density lipoprotein (HDL) concentration had risen by a mean of 34% whereas total triglyceride (TG) concentrations had decreased by a mean of 60%. FM-VP4 also had a profound effect on body weight in these animals. At 8 weeks, the mean body weight was in the 4% FM-VP4 treatment group 25% lower than in the control group. No hepatic or renal toxicity was associated with these changes. In Apo E-deficient mice, after 4- and 8-week treatments FM-VP4 caused a significant decrease in both TC and TG concentrations compared to controls. After 12 weeks, the areas of atherosclerotic lesion involvement in the aortic roots were decreased by a mean of 80% in the 0.5, 1, and 2% FM-VP4 treatment groups compared to controls. Taken together, these results suggest that FM-VP4 is a potential new drug with lipid-lowering and weight loss potential, without apparent toxicity.
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Affiliation(s)
- Agatha W K Ng
- Division of Pharmaceutics and Biopharmaceutics, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, B.C., Canada
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