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Yi M, Toribio AJ, Salem YM, Alexander M, Ferrey A, Swentek L, Tantisattamo E, Ichii H. Nrf2 Signaling Pathway as a Key to Treatment for Diabetic Dyslipidemia and Atherosclerosis. Int J Mol Sci 2024; 25:5831. [PMID: 38892018 PMCID: PMC11172493 DOI: 10.3390/ijms25115831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/13/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024] Open
Abstract
Diabetes mellitus (DM) is a chronic endocrine disorder that affects more than 20 million people in the United States. DM-related complications affect multiple organ systems and are a significant cause of morbidity and mortality among people with DM. Of the numerous acute and chronic complications, atherosclerosis due to diabetic dyslipidemia is a condition that can lead to many life-threatening diseases, such as stroke, coronary artery disease, and myocardial infarction. The nuclear erythroid 2-related factor 2 (Nrf2) signaling pathway is an emerging antioxidative pathway and a promising target for the treatment of DM and its complications. This review aims to explore the Nrf2 pathway's role in combating diabetic dyslipidemia. We will explore risk factors for diabetic dyslipidemia at a cellular level and aim to elucidate how the Nrf2 pathway becomes a potential therapeutic target for DM-related atherosclerosis.
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Affiliation(s)
- Michelle Yi
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
| | - Arvin John Toribio
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
| | - Yusuf Muhammad Salem
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
| | - Michael Alexander
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
| | - Antoney Ferrey
- Department of Medicine, University of California Irvine, Irvine, CA 92697, USA; (A.F.); (E.T.)
| | - Lourdes Swentek
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
| | - Ekamol Tantisattamo
- Department of Medicine, University of California Irvine, Irvine, CA 92697, USA; (A.F.); (E.T.)
| | - Hirohito Ichii
- Department of Surgery, University of California Irvine, Irvine, CA 92697, USA; (M.Y.); (A.J.T.); (Y.M.S.); (M.A.); (L.S.)
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Jordania da Silva V, Dias SRC, Maioli TU, Serafim LR, Furtado LFV, Quintão Silva MDG, Faria AMCD, Rabelo ÉML. Obesity induction in hamster that mimics the human clinical condition. Exp Anim 2017; 66:235-244. [PMID: 28367889 PMCID: PMC5543244 DOI: 10.1538/expanim.17-0009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Although obesity is well established in hamsters, studies using diets with high levels of
simple carbohydrate associated with lipids are necessary to assess the impact of this type
of food in the body. In this study a high sugar and butter diet (HSB) and high temperature
were employed towards this end. Obesity was successfully induced at a temperature of
30.3°C to 30.9°C after 38 days feeding the animals an HSB diet. It was shown that although
diet is important for the induction of obesity, temperature is also essential because at a
temperature slightly below the one required, obesity was not induced, even when the
animals were fed for a longer period (150 days).The obese clinical condition was
accompanied by biochemical and hematological changes, as increased cholesterol and
triglyceride levels and increased leukocyte numbers, similar to alterations observed in
obese humans. Furthermore, it was demonstrated that increasing the intake of simple
carbohydrates associated with lipids provided evidence of inflammation in obese
animals.
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Affiliation(s)
- Vivian Jordania da Silva
- Molecular Parasitology Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Minas Gerais. Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil.,Center University UNA, Guajajaras St, 175, Center. CEP 30180-100, Belo Horizonte, Minas Gerais, Brazil
| | - Sílvia Regina Costa Dias
- Molecular Parasitology Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Minas Gerais. Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil.,Center University Estácio Juiz de Fora, Av. Presidente João Goulart, 600, Cruzeiro do Sul. CEP 36030-900. Juiz de Fora, Minas Gerais, Brazil
| | - Tatiani Uceli Maioli
- Nutrition Department, Nursering School, Federal University of Minas Gerais. Alfredo Balena Ave, 190, Santa Efigênia, CEP 30130-100
| | - Luciana Ribeiro Serafim
- Molecular Parasitology Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Minas Gerais. Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Luis Fernando Viana Furtado
- Molecular Parasitology Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Minas Gerais. Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | | | - Ana Maria Caetano de Faria
- Biochemistry and Immunology Department, Institute of Biological Sciences, Federal University of Minas Gerais, Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Élida Mara Leite Rabelo
- Molecular Parasitology Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Minas Gerais. Antônio Carlos Ave, 6627, Pampulha. CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
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Abstract
The metabolic syndrome (MetS) is comprised of a cluster of closely related risk factors, including visceral adiposity, insulin resistance, hypertension, high triglyceride, and low high-density lipoprotein cholesterol; all of which increase the risk for the development of type 2 diabetes and cardiovascular disease. A chronic state of inflammation appears to be a central mechanism underlying the pathophysiology of insulin resistance and MetS. In this review, we summarize recent research which has provided insight into the mechanisms by which inflammation underlies the pathophysiology of the individual components of MetS including visceral adiposity, hyperglycemia and insulin resistance, dyslipidemia, and hypertension. On the basis of these mechanisms, we summarize therapeutic modalities to target inflammation in the MetS and its individual components. Current therapeutic modalities can modulate the individual components of MetS and have a direct anti-inflammatory effect. Lifestyle modifications including exercise, weight loss, and diets high in fruits, vegetables, fiber, whole grains, and low-fat dairy and low in saturated fat and glucose are recommended as a first line therapy. The Mediterranean and dietary approaches to stop hypertension diets are especially beneficial and have been shown to prevent development of MetS. Moreover, the Mediterranean diet has been associated with reductions in total and cardiovascular mortality. Omega-3 fatty acids and peroxisome proliferator-activated receptor α agonists lower high levels of triglyceride; their role in targeting inflammation is reviewed. Angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, and aldosterone blockers comprise pharmacologic therapies for hypertension but also target other aspects of MetS including inflammation. Statin drugs target many of the underlying inflammatory pathways involved in MetS.
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Affiliation(s)
- Francine K Welty
- Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass.
| | - Abdulhamied Alfaddagh
- Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass
| | - Tarec K Elajami
- Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass
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Abstract
OBJECTIVES The present study aimed to investigate the incidence and predictors of hypertension in an Iranian adult population. METHODS Isfahan Cohort Study was a longitudinal population-based study that was conducted on adults aged 35 years or older, living in urban and rural areas of three districts in central Iran. After 7 years of follow-up, 3283 participants were re-evaluated using a standard protocol similar to the baseline. At both measurements, participants underwent medical interview, physical examination, and fasting blood measurements. Participants (n = 833) with prevalent hypertension were excluded from the analysis, resulting in a sample size of 2450. RESULTS The participants' age was 47.3 ± 9.4 years (mean ± SD) and 50.7% were men. During the follow-up period, 542 (22.1%) individuals developed hypertension, 49.6% of whom were aware of their disease, 42.4% were treated, but only 24.9% were controlled. Incidence rates have shown no sex-specific difference across age and blood pressure (BP) categories. Multivariate-adjusted model controlled for all study covariates showed that age, male sex, general and central obesity, hypertriglyceridemia, impaired fasting glucose, diabetes mellitus, baseline BP at least 120/80 mmHg (nonoptimal BP), and parental history of hypertension independently contributed to the development of hypertension. Higher education level and more than 10% decrease in waist circumference over 7-year follow-up represented protective effects. In men, weight loss decreased and weight gain increased the risk of developing hypertension. Nonoptimal BP along with central obesity and hypertriglyceridemia together were responsible for 71% of the burden of hypertension. CONCLUSION Our findings imply that there are other factors in addition to nonoptimal BP that deserve integrating into the risk assessment criteria for developing hypertension.
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Abstract
This review article summarizes recent research into the mechanisms as to how elevated levels of triglyceride (TG) and low levels of high- density- lipoprotein cholesterol (HDL-C) contribute to inflammation and atherosclerosis. Evidence supports the role of TG-rich lipoproteins in signaling mechanisms via apolipoproteins C-III and free fatty acids leading to activation of NFKβ, VCAM-1 and other inflammatory mediators which lead to fatty streak formation and advanced atherosclerosis. Moreover, the cholesterol content in TG-rich lipoproteins has been shown to predict CAD risk better than LDL-C. In addition to reverse cholesterol transport, HDL has many other cardioprotective effects which include regulating immune function. The "functionality" of HDL appears more important than the level of HDL-C. Insulin resistance and central obesity underlie the pathophysiology of elevated TG and low HDL-C in metabolic syndrome and type 2 diabetes. Lifestyle recommendations including exercise and weight loss remain first line therapy in ameliorating insulin resistance and the adverse signaling processes from elevated levels of TG-rich lipoproteins and low HDL-C.
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Le NA, Farkas-Epperson M, Sweeney ME, Wilson PWF, Virgil Brown W. Effect of ABT-335 (fenofibric acid) on meal-induced oxidative stress in patients with metabolic syndrome. Atherosclerosis 2013; 231:268-73. [PMID: 24267238 DOI: 10.1016/j.atherosclerosis.2013.09.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 09/23/2013] [Accepted: 09/25/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Examine the effect of ABT-335 (fenofibric acid) on postprandial lipemia and susceptibility of plasma lipoproteins to Cu(++)-mediated oxidation in patients with metabolic syndrome. METHODS AND RESULTS This is a randomized double-blind, placebo-controlled study with cross-over and includes a 4-week wash-out period between the two treatment periods. At the end of each 8-week treatment period, subjects were challenged with a standardized mixed meal followed by blood collection over the ensuing 6 h. Plasma lipoproteins were isolated by a combination of ultracentrifugation and FPLC for the continuous monitoring of conjugated dienes formation as an assessment of oxidative susceptibility. Fasting plasma TG was reduced by 20% (p < 0.0002) and there was a modest reduction in hsCRP (6.1%, p < 0.06). There was no change in either HDLc or LDLc in these subjects. Postprandial lipemia was reduced with ABT-335 as demonstrated by a 28.5% reduction (p < 0.0005) in incremental area under the curve for TG during the 6-h period after the meal challenge. Lag times for both fasting LDL (+16%) and postprandial LDL (+28%) were increased with the ABT-335 therapy, suggestive of reduced oxidative susceptibility. Co-incubation with autologous HDL did not reduced LDL oxidative susceptibility in these patients. CONCLUSION ABT-335 therapy reduced fasting and postprandial triglycerides in patients with metabolic syndrome. Autologous HDL may be dysfunctional in these patients as co-incubation with HDL failed to reduce oxidative susceptibility of LDL. During ABT-335 therapy, LDL was less susceptible to Cu(++)-mediated oxidative modification, in spite of the lack of changes in LDLc levels.
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Affiliation(s)
- Ngoc-Anh Le
- Biomarker Core Laboratory, Atlanta VA Medical Center, Decatur, GA, USA; Emory University School of Medicine, Atlanta, GA, USA.
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NADPH oxidase 2 plays a critical role in dysfunction and apoptosis of pancreatic β-cells induced by very low-density lipoprotein. Mol Cell Biochem 2012; 370:103-13. [PMID: 22911512 DOI: 10.1007/s11010-012-1402-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 07/25/2012] [Indexed: 10/28/2022]
Abstract
In type 2 diabetes, pancreatic β-cells cannot secret enough insulin compensate for insulin resistance, which are often accompanied by abnormality in lipid metabolism such as hypertriglyceridemia. It is reported that oxidative stress is involved in pancreatic β-cell dysfunction. However, molecular mechanisms linking between excessive generations of reactive oxygen species (ROS) and β-cell dysfunction and apoptosis induced by high levels of very low-density lipoprotein (VLDL) are poorly understood. In this study, we test the hypothesis that NADPH oxidase 2 (NOX2)-derived ROS may play a key role in dysfunction and apoptosis of pancreatic β-cell induced by VLDL. Our results show that the ApoCIII transgenic mice displayed increased serum TG levels, enhanced generation of ROS and impaired insulin content in pancreatic β-cells. In vitro, the treatment of pancreatic NIT-1 cells with 1 mg/ml VLDL for 12 h stimulated NOX2-derived ROS generation, decreased expression and secretion of insulin. Furthermore, we found that VLDL induced dysfunction and apoptosis of pancreatic β-cells through JNK and p53 pathways, which were rescued by siRNA-mediated NOX2 reduction. In conclusion, our data demonstrate a critical role of NOX2-derived ROS in dysfunction and apoptosis through JNK and p53 pathways in pancreatic β-cells induced by VLDL.
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Lu X, Rasco BA. Determination of Antioxidant Content and Antioxidant Activity in Foods using Infrared Spectroscopy and Chemometrics: A Review. Crit Rev Food Sci Nutr 2012; 52:853-75. [DOI: 10.1080/10408398.2010.511322] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Effect of functional yogurt NY-YP901 in improving the trait of metabolic syndrome. Eur J Clin Nutr 2011; 65:1250-5. [PMID: 21697819 DOI: 10.1038/ejcn.2011.115] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND/OBJECTIVES This study was aimed to assess the beneficial effects on metabolic syndrome of functional yogurt NY-YP901 (Namyang Dairy Product Co. Ltd and Nutra R&BT Inc., Seoul, Korea) supplemented with mixture of Streptococcus thermophilus, Lactobacillus acidophilus, Bifidobacterium infantis and extra-ingredients containing Bifidobacterium breve (CBG-C2), Enterococcus faecalis FK-23, fibersol-2 and so on. SUBJECTS/METHODS This study was designed as an 8-week randomized, double-blind, placebo-controlled, parallel study. Treatment and control groups consumed a functional yogurt NY-YP901 (150 ml) and a placebo yogurt twice a day, respectively, for 8 weeks. Body weight and body mass index (BMI), blood pressure, lipid profiles, fasting glucose with HbA1C and waist circumference were measured before and after treatment. Inclusion criteria were healthy individuals between the ages 20-65 years old who submitted an informed consent. RESULTS During the period August 2009 to December 2009, 101 healthy participants (31 males and 70 females) finished the study. Treatment group were 53 individuals, and the control group were 48 individuals. In the treatment group consuming NY-YP901, statistically significant beneficial changes were observed in body weight (treatment group vs control group=-0.24±1.50 vs +0.64±1.39 kg, P<0.05), BMI (-0.10±0.58 vs +0.24±0.50 kg/m(2), P<0.05 ) and low-density lipoprotein (LDL)-cholesterol (-7.71±14.14 vs -0.43±15.32 mg/dl, P<0.05) after 8 weeks. The change in other parameters was not different between the treatment and the control groups. CONCLUSIONS The functional yogurt NY-YP901 reduced LDL-cholesterol, body weight and BMI in the subjects at a 300-ml consumption daily for 8 weeks. From these findings, regular intake of functional yogurt NY-YP901 may be consequently related to improve metabolic syndrome.
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Kleber ME, Renner W, Grammer TB, Linsel-Nitschke P, Boehm BO, Winkelmann BR, Bugert P, Hoffmann MM, März W. Association of the single nucleotide polymorphism rs599839 in the vicinity of the sortilin 1 gene with LDL and triglyceride metabolism, coronary heart disease and myocardial infarction. Atherosclerosis 2010; 209:492-7. [DOI: 10.1016/j.atherosclerosis.2009.09.068] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Revised: 09/18/2009] [Accepted: 09/23/2009] [Indexed: 10/20/2022]
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12
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Abstract
Very low-density lipoproteins (VLDL) are triglyceride-rich particles. VLDL is synthesized in hepatocytes and secreted from the liver in a pathway that is tightly regulated by insulin. Hepatic VLDL production is stimulated in response to reduced insulin action, resulting in increased release of VLDL into the blood under fasting conditions. Circulating VLDL serves as a vehicle for transporting lipids to peripheral tissues for energy homeostasis. Conversely, hepatic VLDL production is suppressed in response to increased insulin release after meals. This effect is critical for preventing prolonged excursion of postprandial plasma lipid profiles in normal individuals. In subjects with obesity and type 2 diabetes, the ability of insulin to regulate VLDL production becomes impaired due to insulin resistance in the liver, resulting in excessive VLDL secretion and accumulation of triglyceride-rich particles in the blood. Such abnormality in lipid metabolism characterizes the pathogenesis of hypertriglyceridemia and accounts for increased risk of coronary artery disease in obesity and type 2 diabetes. Nevertheless, the molecular basis that links insulin resistance to VLDL overproduction remains poorly understood. Our recent studies illustrate that the forkhead transcription factor FoxO1 acts in the liver to integrate hepatic insulin action to VLDL production. Augmented FoxO1 activity in insulin resistant livers promotes hepatic VLDL overproduction and predisposes to the development of hypertriglyceridemia. These new findings raise an important question: Is FoxO1 a therapeutic target for ameliorating hypertriglyceridemia? Here we discuss this question in the context of recent advances toward our understanding of the pathophysiology of hypertriglyceridemia.
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Affiliation(s)
- Adama Kamagate
- Department of Pediatrics, Division of Immunogenetics, Rangos Research Center, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA
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Norata GD, Grigore L, Raselli S, Redaelli L, Hamsten A, Maggi F, Eriksson P, Catapano AL. Post-prandial endothelial dysfunction in hypertriglyceridemic subjects: Molecular mechanisms and gene expression studies. Atherosclerosis 2007; 193:321-7. [PMID: 17055512 DOI: 10.1016/j.atherosclerosis.2006.09.015] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 09/15/2006] [Accepted: 09/18/2006] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Triglyceride-rich lipoproteins (TGRLs) are a cardiovascular risk factor and induce endothelial dysfunction. In the present study, we investigated the effects of post-prandial TGRLs from type IV hyperlipidemic subjects on endothelial activation addressing the effects of the lipoproteins on intracellular pathways and gene expression. METHODS Thirty fasted hypertriglyceridemic patients were given an oral fat load (OFL) and blood samples were collected before the OFL (T0) and 2, 4, 6 and 8h thereafter. Endothelial function, determined as flow-mediated dilatation of the brachial artery, was assessed at the same time points. TGRLs were isolated at T0 and T4 (PP-TGRL) for in vitro studies. RESULTS Compared with TGRLs, PP-TGRLs induced to a larger extent phosphorylation of p38 MAPK, CREB and IKB-alpha in human endothelial cells and increased the DNA binding activity of CREB, NFAT and NF-kappaB. Furthermore, PP-TRGLs upregulated the expression of several pro-inflammatory genes including vascular cell adhesion molecule-1 (VCAM-1), PECAM-1, ELAM-1, intercellular adhesion molecule-1 (ICAM-1), P-selectin, MCP-1, interleukin-6 (IL-6), TLR-4, CD40, ADAMTS1 and PAI-1. CONCLUSION These effects may relate to the severe impairment of endothelial function seen during the post-prandial phase in hypertriglyceridemic patients.
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Affiliation(s)
- Giuseppe Danilo Norata
- Department of Pharmacological Sciences, University of Milan,Via Balzaretti 9, 20133 Milan, Italy.
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Qu S, Perdomo G, Su D, D’Souza FM, Shachter NS, Dong HH. Effects of apoA-V on HDL and VLDL metabolism in APOC3 transgenic mice. J Lipid Res 2007; 48:1476-87. [PMID: 17438339 PMCID: PMC2665252 DOI: 10.1194/jlr.m600498-jlr200] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Apolipoprotein A-V (apoA-V) and apoC-III are exchangeable constituents of VLDL and HDL. ApoA-V counteracts the effect of apoC-III on triglyceride (TG) metabolism with poorly defined mechanisms. To better understand the effects of apoA-V on TG and cholesterol metabolism, we delivered apoA-V cDNA into livers of hypertriglyceridemic APOC3 transgenic mice by adenovirus-mediated gene transfer. In response to hepatic apoA-V production, plasma TG levels were reduced significantly as a result of enhanced VLDL catabolism without alternations in VLDL production. This effect was associated with reduced apoC-III content in VLDL. Increased apoA-V production also resulted in decreased apoC-III and increased apoA-I content in HDL. Furthermore, apoA-V-enriched HDL was associated with enhanced LCAT activity and increased cholesterol efflux. This effect, along with apoE enrichment in HDL, contributed to HDL core expansion and alpha-HDL formation, accounting for significant increases in both the number and size of HDL particles. As a result, apoA-V-treated APOC3 transgenic mice exhibited decreased VLDL-cholesterol and increased HDL-cholesterol levels. ApoA-V-mediated reduction of apoC-III content in VLDL represents an important mechanism by which apoA-V acts to ameliorate hypertriglyceridemia in adult APOC3 transgenic mice. In addition, increased apoA-V levels accounted for cholesterol redistribution from VLDL to larger HDL particles. These data suggest that in addition to its TG-lowering effect, apoA-V plays a significant role in modulating HDL maturation and cholesterol metabolism.
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Affiliation(s)
- Shen Qu
- Rangos Research Center, Children’s Hospital of Pittsburgh, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - German Perdomo
- Rangos Research Center, Children’s Hospital of Pittsburgh, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Dongming Su
- Rangos Research Center, Children’s Hospital of Pittsburgh, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Fiona M. D’Souza
- Rangos Research Center, Children’s Hospital of Pittsburgh, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Neil S. Shachter
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032
| | - H. Henry Dong
- Rangos Research Center, Children’s Hospital of Pittsburgh, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
- To whom correspondence should be addressed. e-mail:
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15
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Lee CH, Kang K, Mehl IR, Nofsinger R, Alaynick WA, Chong LW, Rosenfeld JM, Evans RM. Peroxisome proliferator-activated receptor delta promotes very low-density lipoprotein-derived fatty acid catabolism in the macrophage. Proc Natl Acad Sci U S A 2006; 103:2434-9. [PMID: 16467150 PMCID: PMC1413732 DOI: 10.1073/pnas.0510815103] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Significant attention has focused on the role of low-density lipoprotein (LDL) in the pathogenesis of atherosclerosis. However, recent advances have identified triglyceride-rich lipoproteins [e.g., very LDL (VLDL)] as independent risk predictors for this disease. We have previously demonstrated peroxisome proliferator-activated receptor (PPAR)delta, but not PPARgamma, is the major nuclear VLDL sensor in the macrophage, which is a crucial component of the atherosclerotic lesion. Here, we show that, in addition to beta-oxidation and energy dissipation, activation of PPARdelta by VLDL particles induces key genes involved in carnitine biosynthesis and lipid mobilization mediated by a recently identified TG lipase, transport secretion protein 2 (also named desnutrin, iPLA2zeta, and adipose triglyceride lipase), resulting in increased fatty acid catabolism. Unexpectedly, deletion of PPARdelta results in derepression of target gene expression, a phenotype similar to that of ligand activation, suggesting that unliganded PPARdelta suppresses fatty acid utilization through active repression, which is reversed upon ligand binding. This unique transcriptional mechanism assures a tight control of the homeostasis of VLDL-derived fatty acid and provides a therapeutic target for other lipid-related disorders, including dyslipidemia and diabetes, in addition to coronary artery disease.
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Affiliation(s)
- Chih-Hao Lee
- *Department of Genetics and Complex Diseases, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115
| | - Kihwa Kang
- *Department of Genetics and Complex Diseases, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115
| | - Isaac R. Mehl
- Howard Hughes Medical Institute, Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037
- Department of Biology and
| | - Russell Nofsinger
- Howard Hughes Medical Institute, Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037
- Department of Biology and
| | - William A. Alaynick
- Howard Hughes Medical Institute, Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037
- Biomedical Sciences Program, University of California at San Diego, La Jolla, CA 92093; and
| | - Ling-Wa Chong
- Howard Hughes Medical Institute, Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037
| | | | - Ronald M. Evans
- Howard Hughes Medical Institute, Gene Expression Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037
- To whom correspondence should be addressed. E-mail:
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Inami M, Kawamura I, Tsujimoto S, Yasuno T, Lacey E, Hirosumi J, Takakura S, Nishigaki F, Naoe Y, Manda T, Mutoh S. FR177391, A New Anti-hyperlipidemic Agent from Serratia. J Antibiot (Tokyo) 2005; 58:640-7. [PMID: 16392680 DOI: 10.1038/ja.2005.88] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The pharmacological effect of FR177391, isolated from Serratia liquefaciens No. 1821, was studied in normal animals and various types of animal models of hypertriglyceridemia. Treatment of normal mice with FR177391 resulted in an increase in heparin-releasable lipoprotein lipase (LPL) activity in the blood and epididymal fat tissue. FR177391 treatment decreased triglyceride (TG) and increased high-density lipoprotein cholesterol in the blood in normal rats following 7 days treatment, suggesting potent LPL activating properties of FR177391. Both Triton WR1339-induced severe and fructose-induced mild hypertriglyceridemia in rats were attenuated by FR177391 treatment. Severely elevated levels of TG in db/db mice, an insulin resistant diabetic animal model, also significantly decreased from 14 days of treatment with FR177391. FR177391 treatment for 9 days caused a decrease in the elevated levels of TG in mice induced by intraperitoneal inoculation of murine lymphoma EL-4. Overall, this study demonstrated that FR177391 can be possibly a LPL activating agent and that FR177391 treatment improved hypertriglyceridemia in various rat and mouse animal models. These results suggest that FR177391 is a promising candidate compound for the management of hypertriglyceridemia.
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Affiliation(s)
- Masamichi Inami
- Medicinal Biology Research Laboratories, Fujisawa Pharmaceutical Co Ltd, Yodogawa-ku, Osaka, Japan.
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Cicero AFG, Derosa G, Miconi A, Laghi L, Nascetti S, Gaddi A. Possible role of ubiquinone in the treatment of massive hypertriglyceridemia resistant to PUFA and fibrates. Biomed Pharmacother 2005; 59:312-7. [PMID: 15932792 DOI: 10.1016/j.biopha.2004.09.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Accepted: 09/30/2004] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE To describe the effect of Coenzyme Q10 (CoQ10) (added to either a fibrate, or polyunsaturated fatty acids (PUFA) or association of both) in patients affected by massive hypertriglyceridemia (MHTG) resistant to fibrates and PUFA. DESIGN Open, sequential, comparative intervention study. SETTING Specialised centres for dyslipidemia management. SUBJECTS Fifteen subjects (mean age: 45.1+/-12.5 years) affected by MHTG and hyporesponsive to either fibrates, or PUFA, or fibrates-PUFA association, and 15 age-matched subjects regularly responders to PUFA and fenofibrate treatment. INTERVENTIONS Treatment for periods of 6 weeks each with the following consecutive treatments: CoQ10 150 mg/day, PUFA 3000 mg/day, fenofibrate 200 mg/day, PUFA 3000 mg/day+fenofibrate 200 mg/day, PUFA 3000 mg/day+CoQ10 150 mg/day, fenofibrate 200 mg/day+CoQ10 150 mg/day, and finally, fenofibrate 200 mg/day+PUFA 3000 mg/day + CoQ10 150 mg/day. RESULTS CoQ10 supplementation did not improve any monitored parameter in the control group except for systolic and diastolic blood pressure, creatinine and Lp(a) plasma levels, both during fenofibrate and/or PUFA treatment. In MHTG group, CoQ10 supplementation significantly improved TG, TC, Lp(a), uric acid and blood pressure during fenofibrate treatment, but only Lp(a) and blood pressure during PUFA treatment. Fenofibrate appeared to have better effect on hsCRP and gamma-GT plasma levels than PUFA. No significant change was observed in any group and under any treatment in regards to homocysteinemia, PAI-1, or t-PA. CONCLUSION Even though the mechanism of action through which the effects were obtained is yet to be elucidated, adding CoQ10 to fenofibrate could improve the drug's efficacy in MHTG patients not responding to fenofibrate alone.
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Affiliation(s)
- A F G Cicero
- GC Descovich Atherosclerosis Research Centre, D. Campanacci Clinical Medicine and Applied Biotechonology Department, S. Orsola-Malpighi Hospital, University of Bologna, Via Massarenti 9, 40138 Bologna, Italy.
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Cicero AFG, Derosa G, Miconi A, Laghi L, Nascetti S, Gaddi A. Treatment of massive hypertriglyceridemia resistant to PUFA and fibrates: a possible role for the coenzyme Q10? Biofactors 2005; 23:7-14. [PMID: 15817994 DOI: 10.1002/biof.5520230102] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To describe the effect of CoQ10 (added to either a fibrate, or PUFA or association of both) in patients affected by massive hypertriglyceridemia (MHTG) resistant to fibrates and PUFA. DESIGN Open, sequential, comparative intervention study. SETTING Specialised centres for dyslipidemia management. SUBJECTS 15 subjects (mean age: 45.1 +/- 12.5 years) affected by MHTG and hyporesponsive to either fibrates, or PUFA, or fibrates-PUFA association, and 15 age-matched subjects regularly responders to PUFA and fenofibrate treatment. INTERVENTIONS Treatment for periods of 6 weeks each with the following consecutive treatments: CoQ10 150 mg/day, PUFA 3000 mg/day, fenofibrate 200 mg/day, PUFA 3000 mg/day + fenofibrate 200 mg/day, PUFA 3000 mg/day + CoQ10 150 mg/day, fenofibrate 200 mg/day + CoQ10 150 mg/day, and finally, fenofibrate 200 mg/day + PUFA 3000 mg/day + CoQ10 150 mg/day. RESULTS CoQ10 supplementation improved, in the control group, systolic and diastolic blood pressure, creatinine and Lp(a) plasma levels, both during fenofibrate and/or PUFA treatment. In MHTG group, CoQ10 supplementation significantly improved TG, TC, Lp(a), uric acid and blood pressure during fenofibrate treatment, but only Lp(a) and blood pressure during PUFA treatment. Fenofibrate appeared to have better effect on hsCRP and gamma-GT plasma levels than PUFA. No significant change was observed in any group and under any treatment in regards to homocysteinemia, PAI-1, or t-PA. CONCLUSION Even though the mechanism of action through which the effects were obtained is yet to be elucidated, adding CoQ10 to fenofibrate could improve the drug's efficacy in MHTG patients not responding to fenofibrate alone.
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Affiliation(s)
- A F G Cicero
- GC Descovich Atherosclerosis Research Centre, D. Campanacci Clinical Medicine and Applied Biotechonology Department, S. Orsola-Malpighi Hospital, University of Bologna, Italy.
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Azambuja MIR. From degeneration to infection/inflammation, and from individual-centered to ecologic approaches to investigation of evolving patterns of diseases occurrences in populations. CIENCIA & SAUDE COLETIVA 2004. [DOI: 10.1590/s1413-81232004000400007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Variation in attributes of CHD cases over time suggests a temporal change in the source sub-population of cases. It is proposed that an early 20th century expansion of a CHD-prone sub-population, characterized by high-serum cholesterol phenotype and high case-fatality - and which contributed with most of the CHD cases and deaths during the 1960s - may have followed the 1918 Influenza Pandemic. The extinction of those birth-cohorts would have resulted in a relative increase in cases coming from a second source sub-population, characterized by insulin resistance and chronic expression of low grade inflammation markers, comparatively less vulnerable to acutely die from CHD. This re-interpretation of the CHD trend, and the abandonment of the idea of degeneration for inflammation/infection calls for a change in epidemiology. Besides exposures (diet, infection...), temporal variations in proportional representations of inherited and acquired phenotypes associated with individual resistance/vulnerability, would be important determinants of evolving patterns of diseases occurrences in populations.
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Perona JS, Cañizares J, Montero E, Sánchez-Domínguez JM, Pacheco YM, Ruiz-Gutierrez V. Dietary virgin olive oil triacylglycerols as an independent determinant of very low-density lipoprotein composition. Nutrition 2004; 20:509-14. [PMID: 15165612 DOI: 10.1016/j.nut.2004.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE We examined the effects of virgin olive oil (VOO) triacylglycerols (TGs) on the lipid composition of human very low-density lipoprotein (VLDL). METHODS Twenty-one normocholesterolemic, normotensive, non-diabetic elderly subjects were recruited for the study. Two VOOs (VOO1 and VOO2) of the same variety, with an equivalent composition in minor components and differing only in the oleic and linoleic acid concentrations, were administered for 4 wk each to assess the effect of their TG molecular species compositions. Blood was collected after an overnight fast, VLDLs were isolated by ultracentrifugation, and lipid classes, TG molecular species, and TG fatty acid composition were determined. RESULTS Dietary VOOs significantly differed in TG molecular species composition. VOO1 represented larger amounts of triolein (P < 0.01), whereas VOO2 was significantly enriched with dilinoleoyl-oleoyl-glycerol, linoleoyl-dioleoyl-glycerol, and linoleoyl-oleoyl-palmitoyl-glycerol (P < 0.01). For VLDL, intake of VOO1 caused an increase of total TG (P < 0.01) due mainly to increases in triolein and linoleoyl-dioleoyl-glycerol. Conversely, VOO2 increased VLDL cholesteryl esters (P < 0.01) and TG rich in arachidonic acid (P < 0.01). CONCLUSIONS The different TG molecular species compositions of dietary oils may be an independent determinant of the lipid composition of VLDL in elderly people and therefore may play a role in regulating lipoprotein metabolism in these subjects.
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Affiliation(s)
- J S Perona
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas, Seville, Spain
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Yang JY, Lee KS, Kim MK, Moon SK, Kang MK, Park BH, Kim JS, Park JW. Effect of Acanthopanax senticosus on lipoprotein lipase in 3T3-L1 adipocytes. Phytother Res 2004; 18:160-3. [PMID: 15022170 DOI: 10.1002/ptr.1413] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The effect of Acanthopanax senticosus (AS) leaves on lipoprotein lipase (LPL) was investigated in 3T3-L1 adipocytes. A water extract of AS leaves increased the LPL activity in culture medium of adipocytes in a dose- and time-dependent manner. The AS extract contained heparin-like LPL releasing components, however, the increase of medium LPL activity was continued up until 12 h, in contrast to the rapid decline after heparin treatment. The increase of LPL mRNA was also observed after AS extract treatment, suggesting that LPL induction occurs at the transcriptional level. The AS extract could partially reverse the LPL suppression by tumour necrosis factor-alpha in 3T3-L1 adipocytes. These results of an AS extract-induced increase of LPL activity in vitro suggest the possible action of AS as a facilitator of plasma triglyceride clearance.
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Affiliation(s)
- Jeong-Yeh Yang
- Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Korea
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Proctor SD, Vine DF, Mamo JCL. Arterial retention of apolipoprotein B(48)- and B(100)-containing lipoproteins in atherogenesis. Curr Opin Lipidol 2002; 13:461-70. [PMID: 12352009 DOI: 10.1097/00041433-200210000-00001] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
PURPOSE OF REVIEW The "response to retention" hypothesis of atherosclerosis suggests that the arterial deposition of cholesterol is directly proportional to the concentration of circulating plasma lipoproteins. However, there is increasing evidence to support the concept that specific lipoproteins may be preferentially retained within the arterial wall, possibly as a result of greater affinity for cell surface and extracellular matrices. RECENT FINDINGS Recently, key studies have provided insight into mechanisms involved in the interaction of apolipoprotein B (apoB)-containing lipoproteins with extracellular matrices. In addition, novel methods and innovative experimental design has enabled us to differentiate between the delivery, retention and efflux of apoB(48)- and apoB(100)-containing lipoproteins. Other studies have demonstrated a relationship between extracellular matrix proteoglycan expression and the development of atherosclerosis. Discussion in the present review also extends to the mechanisms that are involved in the relative intimal retention of apoB(48)- and apoB(100)-containing lipoproteins in order to explain the atherogenicity of these macromolecules. SUMMARY The perspective of this review is to highlight recent advances in the area of arterial lipoprotein retention and the physiological significance these processes may have in the aetiology of cardiovascular disease. Importantly, an understanding of the mechanisms responsible for the retention of apoB(48)/B(100)-containing lipoproteins will enable new strategies to be developed for the future management of cardiovascular disease.
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Affiliation(s)
- Spencer D Proctor
- Department of Nutrition, Dietetics and Food Science, School of Public Health, Curtin University, Perth, Western Australia 6845
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