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Zhu H, Chen L, Chen ZX, Lin H, Liu J, Kwek E, Ma KY, He W, Wang G, Chen ZY. Synthesis of cholesterol analogues and comparison on their effect on plasma cholesterol with β-Sitosterol. Food Chem 2024; 461:140820. [PMID: 39153376 DOI: 10.1016/j.foodchem.2024.140820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 08/07/2024] [Accepted: 08/08/2024] [Indexed: 08/19/2024]
Abstract
The application of plant sterols in the treatment of hypercholesterolemia is promising. We hypothesize that plant sterols can reduce blood cholesterol because they have a side chain of at least three branches. Three cholesterol analogues were synthesized: CA0 (no side chain), CA3 (a 3‑carbon chain with one branch), and CA14 (a 14‑carbon side chain with two branches), and then compared their effect on blood cholesterol with that of β-sitosterol. Structurally, β-sitosterol has a 10‑carbon side chain with three branches. Results demonstrated that β-sitosterol could effectively reduce plasma total cholesterol (TC) by 20.3%, whereas CA0, CA3 and CA14 did not affect plasma TC in hypercholesterolemia hamsters. β-Sitosterol was absent in the plasma and liver, indicating it was not absorbed. We concluded that β-sitosterol with three branches had plasma TC-lowering activity. In contrast, cholesterol analogues with a side chain of two or fewer branches did not affect plasma cholesterol.
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Affiliation(s)
- Hanyue Zhu
- School of Food Science and Engineering / Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, Guangdong, China; School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Longjian Chen
- Shenzhen Bay Laboratory Pingshan Translational Medicine Center, Shenzhen, China
| | - Zi-Xing Chen
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Huiqi Lin
- School of Food Science and Engineering / Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, Guangdong, China
| | - Jianhui Liu
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, China
| | - Erika Kwek
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ka Ying Ma
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Wensen He
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | | | - Zhen-Yu Chen
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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2
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Lu X, Luo C, Wu J, Deng Y, Mu X, Zhang T, Yang X, Liu Q, Li Z, Tang S, Hu Y, Du Q, Xu J, Xie R. Ion channels and transporters regulate nutrient absorption in health and disease. J Cell Mol Med 2023; 27:2631-2642. [PMID: 37638698 PMCID: PMC10494301 DOI: 10.1111/jcmm.17853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/03/2023] [Accepted: 07/06/2023] [Indexed: 08/29/2023] Open
Abstract
Ion channels and transporters are ubiquitously expressed on cell membrane, which involve in a plethora of physiological process such as contraction, neurotransmission, secretion and so on. Ion channels and transporters is of great importance to maintaining membrane potential homeostasis, which is essential to absorption of nutrients in gastrointestinal tract. Most of nutrients are electrogenic and require ion channels and transporters to absorb. This review summarizes the latest research on the role of ion channels and transporters in regulating nutrient uptake such as K+ channels, Ca2+ channels and ion exchangers. Revealing the mechanism of ion channels and transporters associated with nutrient uptake will be helpful to provide new methods to diagnosis and find potential targets for diseases like diabetes, inflammatory bowel diseases, etc. Even though some of study still remain ambiguous and in early stage, we believe that ion channels and transporters will be novel therapeutic targets in the future.
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Affiliation(s)
- Xianmin Lu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Chen Luo
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Jiangbo Wu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Ya Deng
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Xingyi Mu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Ting Zhang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Xiaoxu Yang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Qi Liu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Zhuo Li
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Siqi Tang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Yanxia Hu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Qian Du
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Jingyu Xu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Rui Xie
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
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3
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Dong H, Hu P, Wang J, Zhang Y, Lu N. Associations of Serum Calcium, Magnesium Levels, and Their Ratio with Apolipoproteins in Chinese Adults with Coronary Artery Disease: a Cross-Sectional Study. Biol Trace Elem Res 2022; 200:4221-4229. [PMID: 34787834 DOI: 10.1007/s12011-021-03015-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/02/2021] [Indexed: 02/05/2023]
Abstract
Former evidence regarding the associations of serum calcium (Ca) and magnesium (Mg) levels with apolipoproteins (Apos) in Chinese adults with coronary artery disease (CAD) were scarce. A total of 6781 patients with CAD were included in this cross-sectional study; mean age was 61.0 years. The associations of serum Ca, Mg, and Ca/Mg ratio with Apos (e.g., ApoA1, ApoB, and ApoB/A1 ratio) were determined using multivariate analysis of covariance. Serum Ca, Mg, and Ca/Mg ratio tended to have positive associations with ApoA1, while negative associations of serum Ca, Mg, and Ca/Mg ratio with ApoB and ApoB/A1 ratio were detected. In multivariate analysis, serum Ca, Mg, and Ca/Mg ratio were positively associated with ApoA1 levels (Q [quintile] 5 vs. Q1: 1.245 vs. 1.151 g/L for Ca, 1.207 vs. 1.188 g/L for Mg, 1.202 vs. 1.171 g/L for Ca/Mg ratio). In contrast, negative associations of serum Mg and Ca/Mg ratio with ApoB and ApoB/A1 ratio were shown. The corresponding ApoB and ApoB/A1 ratio values were 0.856 (vs. 0.887 g/L) and 0.728 (vs. 0.771) for Mg, and 0.814 (vs. 0.854 g/L) and 0.695 (vs. 0.751) for Ca/Mg ratio in Q5 compared with Q1. Serum Ca was inversely associated with ApoB and ApoB/A1 ratio (Q5 vs. Q4: 0.804 vs. 0.847 g/L for ApoB; Q5 vs. Q1: 0.662 vs. 0.732 for ApoB/A1 ratio). Path analysis showed that mediating effects of BMI on the "Ca or Mg-Apos" associations were not found. In summary, serum Ca and Mg tended to have positive associations with ApoA1 levels in patients with CAD, but had inverse associations with ApoB levels and ApoB/A1 ratio. Serum Ca/Mg ratio may be a more precise marker than serum Mg or serum Ca measures alone in assessing Apos measures of CAD risk.
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Affiliation(s)
- Hongli Dong
- Scientific Education Section and Department of Child Healthcare, Affiliated Maternity & Child Health Care Hospital of Nantong University, Nantong, 226018, Jiangsu, People's Republic of China
| | - Ping Hu
- Image Center, Wuhan Asia Heart Hospital, Wuhan, 430022, Hubei, People's Republic of China
| | - Jie Wang
- Image Center, Wuhan Asia Heart Hospital, Wuhan, 430022, Hubei, People's Republic of China
| | - Yaju Zhang
- Finance Section, Affiliated Traditional Chinese Medicine Hospital of Nantong University, Nantong, 226018, Jiangsu, People's Republic of China
| | - Nan Lu
- Image Center, Wuhan Asia Heart Hospital, Wuhan, 430022, Hubei, People's Republic of China.
- Department of Cardiology, the First Affiliated Hospital of Shantou University Medical College, Guangdong, 515041, Shantou, People's Republic of China.
- Department of Cardiology, Beijing Anzhen Hospital Affiliated to Capital Medical University, No. 2 Anzhen Road, Beijing, 100029, Chaoyang District, China.
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4
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Recent advances in the screening methods of NPC1L1 inhibitors. Biomed Pharmacother 2022; 155:113732. [PMID: 36166964 DOI: 10.1016/j.biopha.2022.113732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/15/2022] [Accepted: 09/19/2022] [Indexed: 11/24/2022] Open
Abstract
NPC1L1 is a crucial protein involved in sterol lipid absorption and has been shown to play an important role in intestinal cholesterol absorption. Hypercholesterolemia is a significant risk factor for cardiovascular diseases such as coronary heart disease. Screening of NPC1L1 inhibitors is critical for gaining a full understanding of lipid metabolism, developing new cholesterol-lowering medicines, and treating cardiovascular diseases. This work summarized existing methodologies for screening NPC1L1 inhibitors and evaluated their challenges, and will assist the development of novel cholesterol-lowering medications and therapeutic strategies for hypercholesterolemia and other cholesterol-related metabolic disorders.
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5
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Tao J, Liu L, Ma Q, Ma KY, Chen ZY, Ye F, Lei L, Zhao G. Effect of γ-oryzanol on oxygen consumption and fatty acids changes of canola oil. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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6
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Liu L, Zhao Y, Ming J, Chen J, Zhao G, Chen ZY, Wang Y, Lei L. Polyphenol extract and essential oil of Amomum tsao-ko equally alleviate hypercholesterolemia and modulate gut microbiota. Food Funct 2021; 12:12008-12021. [PMID: 34755750 DOI: 10.1039/d1fo03082e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
This study explored the effects of polyphenol extract (TKP) and essential oil (TKO) from Amomum tsao-ko Crevost et Lemaire (tsao-ko) on plasma total cholesterol and gut microbiota. Four groups of hamsters (n = 8 each) were fed one of four diets, respectively, namely a high-cholesterol diet (HCD) containing 0.1% cholesterol, a HCD containing 0.5% cholestyramine (PCD), a HCD with daily oral administration of 1000 mg per kg body weight TKP, and a HCD with daily oral administration of 200 mg per kg body weight TKO for 6 weeks. TKP and TKO equally lowered plasma total cholesterol (TC) by 13-18% via increasing the fecal elimination of total acidic sterols by 50-191%. This might be due to up-regulation of liver cholesterol 7α-hydroxylase (CYP7A1) at both transcriptional and translational levels. At a family level, TKP and TKO diets favorably modified the relative abundance of Ruminococcaceae, Erysipelotrichaceae, and Desulfovibrionaceae associated with acidic sterols and CYP7A1. It was therefore concluded that TKP and TKO were equally effective in alleviating hypercholesterolemia in hamsters via the interaction between gut microbiota and bile acid metabolism.
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Affiliation(s)
- Lijun Liu
- College of Food Science, Southwest University, Chongqing, People's Republic of China.
| | - Yimin Zhao
- School of Life Sciences, The Chinese University of Hong Kong, Shatin NT, Hong Kong, China.
| | - Jian Ming
- College of Food Science, Southwest University, Chongqing, People's Republic of China.
| | - Jia Chen
- College of Food Science, Southwest University, Chongqing, People's Republic of China.
| | - Guohua Zhao
- College of Food Science, Southwest University, Chongqing, People's Republic of China.
| | - Zhen-Yu Chen
- School of Life Sciences, The Chinese University of Hong Kong, Shatin NT, Hong Kong, China.
| | - Yujie Wang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Lin Lei
- College of Food Science, Southwest University, Chongqing, People's Republic of China.
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7
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Zhao Y, He Z, Hao W, Zhu H, Liu J, Ma KY, He WS, Chen ZY. Cholesterol-lowering activity of protocatechuic acid is mediated by increasing the excretion of bile acids and modulating gut microbiota and producing short-chain fatty acids. Food Funct 2021; 12:11557-11567. [PMID: 34709262 DOI: 10.1039/d1fo02906a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The present study aimed to investigate the effects of protocatechuic acid (PCA) on plasma lipid profiles and associated mechanisms with a focus on reshaping gut microbiota. Twenty-four male hamsters were randomly divided into three groups receiving a high-cholesterol diet (HCD) and two HCD diets containing 0.5% (PL) and 1% (PH) PCA, respectively. Feeding PL and PH diets for six weeks significantly reduced plasma total cholesterol by 18% and 24%, respectively. PL and PH diets also significantly lowered plasma non-HDL cholesterol by 37% and 44%, respectively. This was accompanied by an increase in fecal short-chain fatty acids (SCFAs) and fecal bile acids with up-regulation on gene of cholesterol 7α-hydroxylase and down-regulation of 3-hydroxy-3-methylglutaryl-CoA reductase in the liver. Dietary PCA supplementation decreased hepatic lipid accumulation, whereas it increased fecal excretion of lipids. The 16S rRNA analysis found that dietary PCA significantly reduced the ratio of Firmicutes to Bacteroidetes and increased the relative abundance of Bacteroidales S24-7, whereas it reduced the abundance of Lactobacillaceae. It was concluded that dietary PCA favorably modulated plasma lipid profiles and prevented the accumulation of hepatic cholesterol and lipid disposition. Such effect was mediated at least partially by increasing gut production of SCFAs and fecal excretion of bile acids via modulating the gut microbiome.
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Affiliation(s)
- Yimin Zhao
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Zouyan He
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Wangjun Hao
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Hanyue Zhu
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Jianhui Liu
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Ka Ying Ma
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Wen-Sen He
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Zhen-Yu Chen
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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8
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Das S, Choudhuri D. Role of dietary calcium and its possible mechanism against metabolic disorders: A concise review. J Food Biochem 2021; 45:e13697. [PMID: 33694258 DOI: 10.1111/jfbc.13697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 01/19/2021] [Accepted: 02/22/2021] [Indexed: 12/21/2022]
Abstract
The global prevalence of metabolic disorders including hypertension, dyslipidemia, insulin resistance, nonalcoholic fatty liver, and cardiovascular diseases seemed to affect people of all ages cutting across the national, economic, and demographic barrier. Therefore, the prevention of metabolic disorders is considered of paramount importance. The dietary role of nutrients including vitamins and minerals is one of the recommended preventive measures against metabolic disorders in modern society. Recently, dietary calcium, a common nutrient not only showed a beneficial effect against obesity through weight management, but also gained great attention against the risk of metabolic disorders. Though dietary calcium shows several beneficial effects against metabolic disorders but some inconsistent results were also reported. So, the present review aims to extract recent knowledge as well as their possible underlying mechanisms regarding the role of dietary calcium against metabolic disorders. The present review also discusses the negative impact as well as prospect of calcium intake on health issues. In summary, high calcium diet prevents the harmful consequences of metabolic disorders by regulating hormonal actions, alteration in intracellular calcium level, renin-angiotensin system, intestinal fat absorption, fecal fat excretion, lipid metabolism, carbohydrate metabolism, inflammation, and oxidative stress which together improve the metabolic health of an individual. PRACTICAL APPLICATIONS: Metabolic disorder is a global health issue across all sections of society and is growing rapidly in spite of several attempts by the scientific community to prevent it. Recently dietary calcium gained great attention in the last few years for its role in the management and treatment of metabolic disorders. The current review highlights the beneficial role of dietary calcium against several metabolic complications by exploring their underlying mechanisms at cellular level. This study will provide valuable information regarding the recommendation of dietary calcium in health policy as well as its inclusion in the dietary chart through calcium-rich foods and/or taking calcium supplements which can be a useful approach in preventing the risk of metabolic disorder depending on the health status of an individual.
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Affiliation(s)
- Sandeep Das
- Reproductive Physiology and Endocrinology Laboratory, Department of Human Physiology, Tripura University (A Central University), Agartala, India
| | - Dipayan Choudhuri
- Reproductive Physiology and Endocrinology Laboratory, Department of Human Physiology, Tripura University (A Central University), Agartala, India
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Williams K, Segard A, Graf GA. Sitosterolemia: Twenty Years of Discovery of the Function of ABCG5ABCG8. Int J Mol Sci 2021; 22:2641. [PMID: 33807969 PMCID: PMC7961684 DOI: 10.3390/ijms22052641] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/19/2021] [Accepted: 02/26/2021] [Indexed: 02/06/2023] Open
Abstract
Sitosterolemia is a lipid disorder characterized by the accumulation of dietary xenosterols in plasma and tissues caused by mutations in either ABCG5 or ABCG8. ABCG5 ABCG8 encodes a pair of ABC half transporters that form a heterodimer (G5G8), which then traffics to the surface of hepatocytes and enterocytes and promotes the secretion of cholesterol and xenosterols into the bile and the intestinal lumen. We review the literature from the initial description of the disease, the discovery of its genetic basis, current therapy, and what has been learned from animal, cellular, and molecular investigations of the transporter in the twenty years since its discovery. The genomic era has revealed that there are far more carriers of loss of function mutations and likely pathogenic variants of ABCG5 ABCG8 than previously thought. The impact of these variants on G5G8 structure and activity are largely unknown. We propose a classification system for ABCG5 ABCG8 mutants based on previously published systems for diseases caused by defects in ABC transporters. This system establishes a framework for the comprehensive analysis of disease-associated variants and their impact on G5G8 structure-function.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily G, Member 5/genetics
- ATP Binding Cassette Transporter, Subfamily G, Member 5/history
- ATP Binding Cassette Transporter, Subfamily G, Member 5/metabolism
- ATP Binding Cassette Transporter, Subfamily G, Member 8/genetics
- ATP Binding Cassette Transporter, Subfamily G, Member 8/history
- ATP Binding Cassette Transporter, Subfamily G, Member 8/metabolism
- Animals
- Cholesterol/metabolism
- Enterocytes/metabolism
- Enterocytes/pathology
- Hepatocytes/metabolism
- Hepatocytes/pathology
- History, 21st Century
- Humans
- Hypercholesterolemia/genetics
- Hypercholesterolemia/history
- Hypercholesterolemia/metabolism
- Hypercholesterolemia/pathology
- Intestinal Diseases/genetics
- Intestinal Diseases/history
- Intestinal Diseases/metabolism
- Intestinal Diseases/pathology
- Lipid Metabolism, Inborn Errors/genetics
- Lipid Metabolism, Inborn Errors/history
- Lipid Metabolism, Inborn Errors/metabolism
- Lipid Metabolism, Inborn Errors/pathology
- Lipoproteins/genetics
- Lipoproteins/history
- Lipoproteins/metabolism
- Mutation
- Phytosterols/adverse effects
- Phytosterols/genetics
- Phytosterols/history
- Phytosterols/metabolism
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Affiliation(s)
- Kori Williams
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; (K.W.); (A.S.)
| | - Allison Segard
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; (K.W.); (A.S.)
| | - Gregory A. Graf
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; (K.W.); (A.S.)
- Saha Cardiovascular Research Center, Lexington, KY 40536, USA
- Barnstable Brown Diabetes and Obesity Center, Lexington, KY 40536, USA
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10
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Hao W, Kwek E, He Z, Zhu H, Liu J, Zhao Y, Ma KY, He WS, Chen ZY. Ursolic acid alleviates hypercholesterolemia and modulates the gut microbiota in hamsters. Food Funct 2020; 11:6091-6103. [PMID: 32568327 DOI: 10.1039/d0fo00829j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ursolic acid (UA) is a triterpenoid acid widely abundant in fruits and vegetables such as apple, blueberry and cranberry. The present study was carried out to investigate the effect of UA supplementation in diet on blood cholesterol, intestinal cholesterol absorption and gut microbiota in hypercholesterolemic hamsters. A total of thirty-two hamsters were randomly assigned to four groups and given a non-cholesterol diet (NCD), a high-cholesterol diet containing 0.1% cholesterol (HCD), an HCD diet containing 0.2% UA (UAL), or an HCD diet containing 0.4% UA (UAH) for 6 weeks. Results showed that UA supplementation reduced plasma cholesterol by 15-16% and inhibited intestinal cholesterol absorption by 2.6-9.2%. The in vitro micellar cholesterol solubility experiment clearly demonstrated that UA could displace 40% cholesterol from micelles. In addition, UA decreased the ratio of Firmicutes to Bacteroidetes, whereas it enhanced the growth of short chain fatty acid (SCFA)-producing bacteria in the intestine. In conclusion, UA possessed a cholesterol-lowering activity and could favorably modulate the gut microbiota.
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Affiliation(s)
- Wangjun Hao
- School of Life Sciences, Chinese University of Hong Kong, Shatin, Hong Kong, China.
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11
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Wang SH, Wang WW, Zhang HJ, Wang J, Chen Y, Wu SG, Qi GH. Conjugated linoleic acid regulates lipid metabolism through the expression of selected hepatic genes in laying hens. Poult Sci 2019; 98:4632-4639. [PMID: 30951597 DOI: 10.3382/ps/pez161] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 03/12/2019] [Indexed: 01/09/2023] Open
Abstract
The effect of dietary conjugated linoleic acid (CLA) supplementation on lipid metabolism in laying hens was investigated. A total of 360 eighteen-wk-old Hy-Line Brown layers were randomly divided into 4 groups that consisted of 6 replicates with 15 birds each. Birds were fed basal diets with 0, 1%, 2%, and 4% CLA addition. The experiment lasted for 56 D after a 7-D adaptation period. Results showed that dietary CLA addition linearly reduced (P < 0.05) abdominal fat percentage but linearly increased (P < 0.05) relative liver weight of layers on day 56. A linear reduction (P < 0.05) in serum low-density lipoprotein cholesterol (LDL-C) level and a linear elevation (P < 0.05) in the ratio of serum high-density lipoprotein cholesterol level to LDL-C level of layers on both days 28 and 56 were observed with dietary CLA addition, which also linearly decreased (P < 0.05) cholesterol content in the liver of layers on day 56 as well as in eggs on both days 28 and 56. Besides, there were linear reductions (P < 0.05) in the gene expression and contents of hepatic 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGR) and cholesterol 7 alpha hydroxylase 1 (CYP7A1), along with a linear increase (P < 0.05) in the gene expression and content of hepatic low-density lipoprotein receptor (LDLR) in layers responded to dietary CLA addition. In conclusion, dietary CLA supplementation decreased the accumulation of lipids including abdominal fat and cholesterol in the liver and egg of laying hens, probably by upregulating hepatic LDLR expression and downregulating hepatic HMGR and CYP7A1 expression.
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Affiliation(s)
- Sheng-Hui Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Wei-Wei Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Hai-Jun Zhang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Jing Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Yu Chen
- Beijing Stockbreeding Station, Beijing 100026, P. R. China
| | - Shu-Geng Wu
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Guang-Hai Qi
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, National Engineering Research Center of Biological Feed, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
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12
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Liu J, Hao W, He Z, Kwek E, Zhao Y, Zhu H, Liang N, Ma KY, Lei L, He WS, Chen ZY. Beneficial effects of tea water extracts on the body weight and gut microbiota in C57BL/6J mice fed with a high-fat diet. Food Funct 2019; 10:2847-2860. [PMID: 31062778 DOI: 10.1039/c8fo02051e] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Accumulative evidence has suggested that tea consumption has benefits in reducing body fat and alleviating metabolic syndrome. We hypothesize that benefits of tea consumption can be partially mediated by modulating intestinal microbiota via inhibiting the formation of lipopolysaccharides (LPS) and promoting the production of short chain fatty acids (SCFAs). C57BL/6J mice were fed a high fat diet with the addition of 1% water extracts of green tea, oolong tea and black tea. Results showed that the dietary supplementation of three tea water extracts equally improved the glucose tolerance and reduced a high fat diet-induced gain in weight, hepatic lipids, and white adipose tissue weights. This was accompanied by a significant reduction in plasma LPS and a significant increase in the production of SCFAs. The metagenomic analyses showed that the tea extracts changed the overall composition of gut microbiota and decreased the relative abundance of family Rikenellaceae and Desulfovibrionaceae. In addition, tea water extracts could also change the abundance of key operational taxonomic units (OTUs) including OTU473 (Alistipes), OTU229 (Rikenella), OTU179 (Ruminiclostridium) and OTU264 (Acetatifactor). In conclusion, three tea extracts could improve the glucose tolerance, induce the production of SCFAs and inhibit the production of endotoxin LPS, most likely mediated by modulating gut microbiota.
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Affiliation(s)
- Jianhui Liu
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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Liu Y, Yang J, Lei L, Wang L, Wang X, Ma KY, Yang X, Chen ZY. Isoflavones enhance the plasma cholesterol-lowering activity of 7S protein in hypercholesterolemic hamsters. Food Funct 2019; 10:7378-7386. [PMID: 31651924 DOI: 10.1039/c9fo01432b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Previous studies have shown that 7S protein is the active ingredient responsible for the plasma cholesterol-lowering activity of soybean. It is hypothesized that isoflavones in soybean could enhance the blood cholesterol-lowering activity of 7S protein. Forty-eight hamsters were divided into six groups and fed a non-cholesterol diet or one of the five high-cholesterol diets containing 12.1% 7S protein with 0-15.62 mg g-1 isoflavones. The results showed that addition of isoflavones in diets dose-dependently enhanced the plasma total cholesterol-lowering activity of 7S protein. Addition of isoflavones in 7S protein-based diets significantly reduced hepatic cholesterol accumulation by 12.6-26.1%, compared with the high cholesterol control diet. Isoflavones could also facilitate excretion of neutral sterols in a dose-dependent manner. Supplementation of isoflavones in diets favourably modulated mRNA expression and the protein mass of HMG-CoA reductase. It was concluded that the enhancing effect of isoflavones on the blood cholesterol-lowering activity of 7S protein was mediated by inhibiting the cholesterol absorption and de novo cholesterol synthesis in hypercholesterolemic hamsters.
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Affiliation(s)
- Yuwei Liu
- School of Public Health, Fudan University, Shanghai, China and School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Juan Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China and School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang, Guangdong, China
| | - Lin Lei
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China. and College of Food Science, Southwest University, Chongqing, China
| | - Lijun Wang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Xiaobo Wang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Ka Ying Ma
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
| | - Xiaoquan Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China
| | - Zhen-Yu Chen
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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Alomaim H, Griffin P, Swist E, Plouffe LJ, Vandeloo M, Demonty I, Kumar A, Bertinato J. Dietary calcium affects body composition and lipid metabolism in rats. PLoS One 2019; 14:e0210760. [PMID: 30629707 PMCID: PMC6328234 DOI: 10.1371/journal.pone.0210760] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 12/30/2018] [Indexed: 12/28/2022] Open
Abstract
Calcium (Ca) intakes may affect cardiovascular disease risk by altering body composition (body weight and fat) and serum lipid profile, but results have been inconsistent and the underlying mechanisms are not well understood. The effects of dietary Ca on body composition and lipid metabolism were examined in rats. Male Sprague-Dawley rats were fed high-fat, high-energy diets containing (g/kg) low (0.75Ca, 0.86 ± 0.05; 2Ca, 2.26 ± 0.02), normal (5Ca, 5.55 ± 0.08) or high (10Ca, 11.03 ± 0.17; 20Ca, 21.79 ± 0.15) Ca for 10 weeks. Rats fed the lowest Ca diet (0.75Ca) had lower (p < 0.05) body weight and fat mass compared to other groups. Rats fed the high Ca diets had lower serum total and LDL cholesterol compared to rats fed normal or low Ca. Liver total cholesterol was lower in rats fed high compared to low Ca. In general, liver mRNA expression of genes involved in cholesterol uptake from the circulation (Ldlr), cholesterol synthesis (Hmgcr and Hmgcs1), fatty acid oxidation (Cpt2) and cholesterol esterification (Acat2) were higher in rats fed higher Ca. Apparent digestibility of total trans, saturated, monounsaturated and polyunsaturated fatty acids was lower in rats fed the high compared to the low Ca diets, with the largest effects seen on trans and saturated fatty acids. Fecal excretion of cholesterol and total bile acids was highest in rats fed the highest Ca diet (20Ca). The results suggest little effect of dietary Ca on body composition unless Ca intakes are very low. Decreased bile acid reabsorption and reduced absorption of neutral sterols and saturated and trans fatty acids may contribute to the better serum lipid profile in rats fed higher Ca.
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Affiliation(s)
- Haya Alomaim
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- King Saud bin Abdulaziz University for Health Sciences, Al Hars Al Watani, Ar Rimayah, Riyadh, Saudi Arabia
| | - Philip Griffin
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Eleonora Swist
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Louise J. Plouffe
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Michelle Vandeloo
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Isabelle Demonty
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
| | - Ashok Kumar
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Jesse Bertinato
- Nutrition Research Division, Bureau of Nutritional Sciences, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- * E-mail:
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Li Y, Fei X, Dai H, Li J, Zhu W, Deng X. Genome-Wide Identification of Calcium-Dependent Protein Kinases in Chlamydomonas reinhardtii and Functional Analyses in Nitrogen Deficiency-Induced Oil Accumulation. FRONTIERS IN PLANT SCIENCE 2019; 10:1147. [PMID: 31695707 PMCID: PMC6818280 DOI: 10.3389/fpls.2019.01147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 08/22/2019] [Indexed: 05/15/2023]
Abstract
Calcium-dependent protein kinases (CDPKs) are recognized as important calcium (Ca2+) sensors in signal transduction and play multiple roles in plant growth and developmental processes, as well as in response to various environmental stresses. However, little information is available about the CDPK family in the green microalga Chlamydomonas reinhardtii. In this study, 15 CrCDPK genes were identified in C. reinhardtii genome, and their functions in nitrogen (N) deficiency-induced oil accumulation were analyzed. Our results showed that all CrCDPK proteins harbored the typical elongation factor (EF)-hand Ca2+-binding and protein kinase domains. Phylogenetic analysis revealed that these CrCDPKs were clustered into one group together with a subclade of several CPKs from Arabidopsis and rice, clearly separating from the remaining AtCPKs and OsCPKs. These genes were located in 10 chromosomes and one scaffold of C. reinhardtii and contained 6-17 exons. RNA sequencing and quantitative reverse transcription (qRT)-PCR assays indicated that most of these CrCDPKs were significantly induced by N deficiency and salt stress. Lanthanum chloride (LaCl3), a plasma membrane Ca2+ channel blocker, limited oil accumulation in C. reinhardtii under N-deficient conditions, suggesting that Ca2+ was involved in N deficiency-induced oil accumulation. Furthermore, RNA interference (RNAi) silencing analyses demonstrated that six CrCDPKs played positive roles and three CrCDPKs played negative roles in N deficiency-induced oil accumulation in C. reinhardtii.
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Affiliation(s)
- Yajun Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Xiaowen Fei
- Biochemistry and Molecular Biology Department, Hainan Medical College, Haikou, China
| | - Haofu Dai
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jiangyue Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Weiju Zhu
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Xiaodong Deng
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
- *Correspondence: Xiaodong Deng,
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16
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Zhu H, He Z, Kwek E, Liu J, Hao W, Liang N, Zhao Y, Ma KY, He WS, Chen ZY. Dose-Dependent Increases in Liver Cholesterol but Not Plasma Cholesterol from Consumption of One to Five Whole Eggs and No Effects from Egg Whites on Liver or Plasma Cholesterol in Hamsters. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12805-12814. [PMID: 30415537 DOI: 10.1021/acs.jafc.8b04730] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The dose-dependent effect of egg consumption on plasma cholesterol in humans remains inconclusive. It is unknown if egg white consumed in a normal amount can reduce plasma cholesterol. We used hamsters as a model to (i) investigate the dose-dependent effect of consuming zero to five whole eggs on plasma total cholesterol (TC) and (ii) examine if egg white, equivalent to one to five eggs, possessed any reducing effects on plasma TC. In experiment 1, hamsters were divided into six groups ( n = 8 each) and fed either a control diet or one of five experimental diets supplemented with whole-egg powder equivalent to one to five eggs per 2000 kcal. Results showed that supplementation with one egg increased plasma TC by 25% compared with that of the control (226 ± 16 versus 282 ± 56 mg/dL, p < 0.05), whereas supplementation with two to five eggs did not significantly produce any additional effects on plasma cholesterol. However, supplementation with one to five eggs in diets caused a dose-dependent accumulation of cholesterol in the liver from 21.5 ± 4.4 to 71.3 ± 7.3 mg/g ( p < 0.01). In the second experiment, hamsters were divided into six groups and fed either a high-cholesterol control diet or one of five experimental diets supplemented with egg-white powder from one to five eggs. Results showed that egg-white powder affected neither plasma nor liver cholesterol levels. The egg-white powder did not affect fecal sterol excretion, suggesting it had no effect on cholesterol absorption. It was therefore concluded that consumption of two to five eggs did not significantly produce any additional effects on plasma cholesterol, whereas egg white did not possess a plasma-cholesterol-lowering activity if it was consumed at amounts similar to those in a normal human diet.
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Affiliation(s)
- Hanyue Zhu
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Zouyan He
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Erika Kwek
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Jianhui Liu
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Wangjun Hao
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Ning Liang
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Yimin Zhao
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Ka Ying Ma
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
| | - Wen-Sen He
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
- School of Food and Biological Engineering , Jiangsu University , 301 Xuefu Road , Zhenjiang 212013 , Jiangsu , China
| | - Zhen-Yu Chen
- School of Life Sciences , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong , China
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17
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Reboul E. Vitamin E intestinal absorption: Regulation of membrane transport across the enterocyte. IUBMB Life 2018; 71:416-423. [PMID: 30308094 DOI: 10.1002/iub.1955] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/28/2018] [Accepted: 08/31/2018] [Indexed: 12/29/2022]
Abstract
Vitamin E is an essential molecule for our development and health. It has long been thought that it was absorbed and transported through cellular membranes by a passive diffusion process. However, data obtained during the past 15 years showed that its absorption is actually mediated, at least in part, by cholesterol membrane transporters including the scavenger receptor class B type I (SR-BI), CD36 molecule (CD36), NPC1-like transporter 1 (NPC1L1), and ATP-binding cassettes A1 and G1 (ABCA1 and ABCG1). This review focuses on the absorption process of vitamin E across the enterocyte. A special attention is given to the regulation of this process, including the possible competition with other fat-soluble micronutrients, and the modulation of transporter expressions. Overall, recent results noticeably increased the comprehension of vitamin E intestinal transport, but additional investigations are still required to fully appreciate the mechanisms governing vitamin E bioavailability. © 2018 IUBMB Life, 71(4):416-423, 2019.
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18
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Guo CF, Yuan YH, Yue TL, Li JY. Hamsters Are a Better Model System than Rats for Evaluating the Hypocholesterolemic Efficacy of Potential Probiotic Strains. Mol Nutr Food Res 2018; 62:e1800170. [PMID: 29939474 DOI: 10.1002/mnfr.201800170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 06/01/2018] [Indexed: 01/17/2023]
Abstract
SCOPE Rats and hamsters are the most commonly used animal models for evaluating the hypocholesterolemic activity of potential probiotic strains, whereas little or no information has been reported on whether the animal models would affect the experimental conclusions regarding the hypocholesterolemic efficacy of the strains. METHODS AND RESULTS Both high-cholesterol-fed rats and hamsters were intragastrically administered viable cells of bile salt hydrolase-active Lactobacillus acidophilus K16 once daily (1 × 1010 CFU per kg body weight) for 28 d. It was found that the strain did not significantly (p > 0.05) affect the serum and hepatic cholesterol levels in rats, whereas it significantly decreased (p < 0.01 or p < 0.001) the serum total and non-HDL-cholesterol as well as hepatic-free, esterified, and total cholesterol levels in hamsters by 29.6%, 38.8%, 15.8%, 36.2%, and 34.0%, respectively. CONCLUSION These data suggest that the hypocholesterolemic efficacy of L. acidophilus K16 is substantially different between high-cholesterol-fed hamsters and rats and that hamsters are a better model system than rats for evaluating the hypocholesterolemic efficacy of potential probiotic strains due to their similarity to humans in biliary bile acid composition, including types of bile acids and their conjugation form.
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Affiliation(s)
- Chun-Feng Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Ya-Hong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Tian-Li Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Jing-Yan Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
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19
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Patel SB, Graf GA, Temel RE. ABCG5 and ABCG8: more than a defense against xenosterols. J Lipid Res 2018; 59:1103-1113. [PMID: 29728459 DOI: 10.1194/jlr.r084244] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/17/2018] [Indexed: 12/14/2022] Open
Abstract
The elucidation of the molecular basis of the rare disease, sitosterolemia, has revolutionized our mechanistic understanding of how dietary sterols are excreted and how cholesterol is eliminated from the body. Two proteins, ABCG5 and ABCG8, encoded by the sitosterolemia locus, work as obligate dimers to pump sterols out of hepatocytes and enterocytes. ABCG5/ABCG8 are key in regulating whole-body sterol trafficking, by eliminating sterols via the biliary tree as well as the intestinal tract. Importantly, these transporters keep xenosterols from accumulating in the body. The sitosterolemia locus has been genetically associated with lipid levels and downstream atherosclerotic disease, as well as formation of gallstones and the risk of gallbladder cancer. While polymorphic variants raise or lower the risks of these phenotypes, loss of function of this locus leads to more dramatic phenotypes, such as premature atherosclerosis, platelet dysfunction, and thrombocytopenia, and, perhaps, increased endocrine disruption and liver dysfunction. Whether small amounts of xenosterol exposure over a lifetime cause pathology in normal humans with polymorphic variants at the sitosterolemia locus remains largely unexplored. The purpose of this review will be to summarize the current state of knowledge, but also highlight key conceptual and mechanistic issues that remain to be explored.
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Affiliation(s)
- Shailendra B Patel
- Division of Endocrinology, Diabetes, and Metabolism, University of Cincinnati, Cincinnati, OH 45219
| | - Gregory A Graf
- Department of Pharmaceutical Sciences and Saha Cardiovascular Research Center and University of Kentucky, Lexington, KY 40536
| | - Ryan E Temel
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40536
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20
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Lei L, Chen J, Liu Y, Wang L, Zhao G, Chen ZY. Dietary Wheat Bran Oil Is Equally as Effective as Rice Bran Oil in Reducing Plasma Cholesterol. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2765-2774. [PMID: 29502409 DOI: 10.1021/acs.jafc.7b06093] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Rice bran oil (RBO) possesses a plasma cholesterol-lowering activity, while effect of wheat bran oil (WBO) on plasma cholesterol remains unknown. The present study compared the cholesterol-lowering activity of WBO with that of RBO in hamsters. Fifty-four male hamsters were divided into seven groups fed either a noncholesterol diet (NCD) or one of six high-cholesterol diets, namely HCD diet (0.2% cholesterol +9.5% lard), HCD+C diet (0.2% cholesterol +9.5% lard +0.5% cholestyramine), WL diet (0.2% cholesterol +4.8% Lard +4.8% WBO), WH diet (0.2% cholesterol +9.5% WBO), RL diet (0.2% cholesterol +4.8% Lard +4.8% RBO), and RH diet (0.2% cholesterol +9.5% RBO). Plasma total cholesterol (TC) in HCD group was 327.4 ± 31.8 mg/dL, while plasma TC in two WBO and two RBO groups was 242.2 ± 20.8, 243.1 ± 31.7, 257.1 ± 16.3, and 243.4 ± 46.0 mg/dL, respectively, leading to a decrease in plasma TC by 22-26% ( P < 0.01). No significant difference in cholesterol-lowering potency was seen between WBO and RBO. Plasma cholesterol-lowering activity of WBO and RBO was accompanied by down-regulation of hepatic 3-hydroxy-3-methylglutaryl-CoA reductase and fatty acid synthase, while up-regulation of cholesterol-7α-hydroxylase. WL, WH, RL, and RH diets increased the fecal excretion of total neutral sterols by 72.8%, 106.9%, 5.4%, and 36.8% ( P < 0.01) respectively. Results indicated WBO and RBO could inhibit cholesterol absorption via down-regulation of intestinal Niemann-Pick C1 like 1 protein, acyl CoA:cholesterol acyltransferase 2, and ATP binding cassette transporter 5. In summary, WBO was equally effective as RBO in decreasing plasma cholesterol in hypercholesterolemia hamsters.
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Affiliation(s)
- Lin Lei
- College of Food Science , Southwest University , Chongqing 400715 , China
- School of Life Sciences , The Chinese University of Hong Kong , Hong, Kong , China
| | - Jingnan Chen
- Provincial Key Laboratory for Transformation and Utilization of Cereal Resource , Henan University of Technology , Zhengzhou , Henan 450001 , China
| | - Yuwei Liu
- School of Public Health , Fudan University , Shanghai 200032 , China
| | - Lijun Wang
- Shenzhen Institute for Drug Control, Shenzhen , China
| | - Guohua Zhao
- College of Food Science , Southwest University , Chongqing 400715 , China
| | - Zhen-Yu Chen
- School of Life Sciences , The Chinese University of Hong Kong , Hong, Kong , China
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21
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Li TT, Li TH, Peng J, He B, Liu LS, Wei DH, Jiang ZS, Zheng XL, Tang ZH. TM6SF2: A novel target for plasma lipid regulation. Atherosclerosis 2018; 268:170-176. [PMID: 29232562 DOI: 10.1016/j.atherosclerosis.2017.11.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 11/07/2017] [Accepted: 11/30/2017] [Indexed: 02/08/2023]
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22
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Zhao Y, Liu J, Hao W, Zhu H, Liang N, He Z, Ma KY, Chen ZY. Structure-Specific Effects of Short-Chain Fatty Acids on Plasma Cholesterol Concentration in Male Syrian Hamsters. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10984-10992. [PMID: 29190422 DOI: 10.1021/acs.jafc.7b04666] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Previous studies have shown that short-chain fatty acids (SCFAs) are capable of decreasing plasma cholesterol. However, the relative plasma-cholesterol-lowering activity of individual SCFAs and the underlying mechanisms by which SCFAs decrease plasma cholesterol remain largely unknown. The present study was done to compare the plasma-cholesterol-lowering potencies of four common SCFAs with 2-5 carbons and to investigate their interactions with gene expressions of key regulatory factors involved in cholesterol metabolism. For 6 weeks, five groups of male Golden hamsters were fed either a control high-cholesterol diet (HCD) or one of the four experimental HCDs containing 0.5 mol of acetate (Ac), propionate (Pr), butyrate (Bu), or valerate (Va) per kilogram of the diet. The results showed that Ac, Pr, and Bu significantly reduced plasma total cholesterol (TC) by 24, 18, and 17% (P < 0.05), respectively. All four SCFAs could decrease non-HDL cholesterol (non-HDL-C) and the non-HDL-C/HDL-C ratio. The addition of Ac, Pr, or Bu into the diet significantly promoted fecal excretion of bile acids by 121, 113, or 120% (P < 0.05), respectively, and upregulated the gene expressions of sterol-regulatory-element-binding protein 2 (SREBP2), low-density-lipoprotein receptor (LDLR), and cholesterol 7α-hydroxylase (CYP7A1) in the liver. It was concluded that SCFAs with 2-4 carbons (Ac, Pr, and Bu) are more hypocholesterolemic than Va, which has 5 carbons, via enhancing fecal excretion of bile acids and promoting the hepatic uptake of cholesterol from the blood.
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Affiliation(s)
- Yimin Zhao
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Jianhui Liu
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Wangjun Hao
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Hanyue Zhu
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Ning Liang
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Zouyan He
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Ka Ying Ma
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Zhen-Yu Chen
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
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23
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Falahi E, Roosta S, Abedini M, Ebrahimzadeh F. Relationship between yoghurt consumption and components of metabolic syndrome: A cross-sectional study in the west of Iran. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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24
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Samimi M, Kashi M, Foroozanfard F, Karamali M, Bahmani F, Asemi Z, Hamidian Y, Talari HR, Esmaillzadeh A. The effects of vitamin D plus calcium supplementation on metabolic profiles, biomarkers of inflammation, oxidative stress and pregnancy outcomes in pregnant women at risk for pre-eclampsia. J Hum Nutr Diet 2016; 29:505-15. [PMID: 26467311 DOI: 10.1111/jhn.12339] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The present study was designed to examine the effects of vitamin D plus calcium administration on metabolic profiles and pregnancy outcomes among women at risk for pre-eclampsia. METHODS In a prospective, double-blind, placebo-controlled trial, 60 women at risk for pre-eclampsia were randomised to take either 50 000 IU vitamin D3 every 2 weeks plus 1000 mg day(-1) calcium supplements (as calcium carbonate) (n = 30) or to receive placebos at the same times (n = 30) from 20 to 32 weeks of gestation. Fasting blood samples were taken at baseline and 12 weeks after intervention to determine related variables. Newborn anthropometric measurements were determined. RESULTS Taking combined cholecalciferol and calcium supplements, compared to placebo, led to significant reductions in fasting plasma glucose (FPG) [mean (SD)] [-5.7 (5.5) versus -0.6 (12.6) mg dL(-1) , P = 0.04], serum insulin concentrations [-2.8 (6.0) versus +7.7 (9.8) μIU mL(-1) , P < 0.001], homeostasis model of assessment-insulin resistance [-0.8 (1.3) versus +1.6 (2.2), P < 0.001], homeostatic model assessment-beta cell function [-8.2 (25.8) versus +32.6 (41.3, P < 0.001] and a significant rise in quantitative insulin sensitivity check index score [+0.02 (0.02) versus -0.02 (0.02, P < 0.001]. Additionally, pregnant women who received cholecalciferol plus calcium supplements had increased serum high-density lipoprotein (HDL)-cholesterol [+4.6 (8.3) versus -2.9 (7.7) mg dL(-1) , P = 0.001] and plasma total glutathione (GSH) concentrations [+23.4 (124.0) versus -94.8 (130.2) μm, P = 0.001] compared to placebo. However, after adjustment for the baseline levels, maternal age and baseline body mass index, the effects on FPG levels (P = 0.13) and systolic blood pressure (P = 0.13) disappeared. CONCLUSIONS Vitamin D plus calcium administration for 12 weeks had beneficial effects on glycaemic status, HDL-cholesterol, GSH and blood pressure among women at risk for pre-eclampsia.
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Affiliation(s)
- M Samimi
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - M Kashi
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - F Foroozanfard
- Department of Gynecology and Obstetrics, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - M Karamali
- Department of Gynecology and Obstetrics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - F Bahmani
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Z Asemi
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Y Hamidian
- Department of Radiology, Kashan University of Medical Sciences, Kashan, Iran
| | - H R Talari
- Department of Radiology, Kashan University of Medical Sciences, Kashan, Iran
| | - A Esmaillzadeh
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
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Shin BR, Choi YK, Kim HN, Song SW. High dietary calcium intake and a lack of dairy consumption are associated with metabolic syndrome in obese males: the Korean National Health and Nutrition Examination Survey 2010 to 2012. Nutr Res 2016; 36:518-25. [DOI: 10.1016/j.nutres.2016.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/04/2016] [Accepted: 01/08/2016] [Indexed: 12/16/2022]
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Pavadhgul P, Sirikanchanarod A, Bumrungpert A, Kaewruang W, Senawong T. The Effect of Mulberry Fruits Consumption on Lipid Profiles in Hypercholesterolemic Subjects: A Randomized Controlled Trial. ACTA ACUST UNITED AC 2016. [DOI: 10.6000/1927-5951.2016.06.01.2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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27
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Zhang Z, Xu C. Mechanisms of calcium intake in lowering serum cholesterol levels. Shijie Huaren Xiaohua Zazhi 2016; 24:505-512. [DOI: 10.11569/wcjd.v24.i4.505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular diseases (CVDs), a group of disorders of the heart and blood vessels, are the leading cause of death globally. An estimated 17.1 million people die of CVDs each year, more than 40% of whom die from coronary heart disease (CHD). Hypercholesterolemia is a major risk factor for increasing CHD morbidity and mortality, and serum cholesterol level is a key predictor of CHD development. A number of studies have demonstrated that calcium supplement can lower serum cholesterol levels, which means that calcium might play an important role in preventing the development of CVDs, especially CHD. In this paper, the mechanisms of calcium intake in lowering serum cholesterol levels are summarized, including increasing the excretion of bile acids, interfering with cholesterol absorption, inhibiting the absorption of saturated fatty acids, promoting energy metabolism, regulating plasma 1,25(OH)2D levels, affecting blood insulin sensibility and controlling appetite.
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28
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Li S, He Y, Lin S, Hao L, Ye Y, Lv L, Sun Z, Fan H, Shi Z, Li J, Feng R, Na L, Wang Y, Li Y, Sun C. Increase of circulating cholesterol in vitamin D deficiency is linked to reduced vitamin D receptor activity via the Insig-2/SREBP-2 pathway. Mol Nutr Food Res 2016; 60:798-809. [DOI: 10.1002/mnfr.201500425] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 12/04/2015] [Accepted: 12/10/2015] [Indexed: 12/22/2022]
Affiliation(s)
- Songtao Li
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Yujie He
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Song Lin
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Liuyi Hao
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Yaxin Ye
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Lin Lv
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Zongxiang Sun
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Huiru Fan
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Zhiping Shi
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Jie Li
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Rennan Feng
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Lixin Na
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
| | - Yanwen Wang
- Institute for Nutrisciences and Health; National Research Council Canada; Charlottetown PE Canada
| | - Ying Li
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
- Research Institute of Food, Nutrition and Health, Sino-Russian Medical Research Center; Harbin Medical University; Harbin China
| | - Changhao Sun
- Department of Nutrition and Food Hygiene, Public Health College; Harbin Medical University; Harbin China
- Research Institute of Food, Nutrition and Health, Sino-Russian Medical Research Center; Harbin Medical University; Harbin China
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29
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Lei L, Li YM, Wang X, Liu Y, Ma KY, Wang L, Man SW, Zhang C, Huang Y, Chen ZY. Plasma triacylglycerol-lowering activity of citrus polymethoxylated flavones is mediated by modulating the genes involved in lipid metabolism in hamsters. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201500060] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lin Lei
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Yuk Man Li
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Xiaobo Wang
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Yuwei Liu
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Ka Ying Ma
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Lijun Wang
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Sun Wa Man
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Chengnan Zhang
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Yu Huang
- School of Biomedical Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
| | - Zhen-Yu Chen
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT Hong Kong P. R. China
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30
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Kawase A, Araki Y, Ueda Y, Nakazaki S, Iwaki M. Impact of a high-cholesterol diet on expression levels of Niemann–Pick C1-like 1 and intestinal transporters in rats and mice. Eur J Drug Metab Pharmacokinet 2015; 41:457-63. [DOI: 10.1007/s13318-015-0269-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 02/13/2015] [Indexed: 10/24/2022]
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31
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Liu Y, Lei L, Wang X, Ma KY, Li YM, Wang L, Man SW, Huang Y, Chen ZY. Plasma cholesterol-raising potency of dietary free cholesterol versus cholesteryl ester and effect of β-sitosterol. Food Chem 2015; 169:277-82. [DOI: 10.1016/j.foodchem.2014.07.123] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 11/30/2022]
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32
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Lei L, Wang X, Huang W, Liu Y, Zheng F, Ma KY, Li YM, Wang L, Man SW, Zhang C, Chen ZY. Cholesterol side chain analogs but not its ether analogs possess cholesterol-lowering activity. Food Funct 2015; 6:630-4. [DOI: 10.1039/c4fo01044b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
SI is hypocholesterolemic with little absorption, while CE and CM are well absorbed and have no effect on plasma cholesterol.
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Affiliation(s)
- Lin Lei
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Xiaobo Wang
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Weihuan Huang
- Institute of Traditional Chinese Medicine and Natural Products
- Jinan University
- Guangzhou
- China
| | - Yuwei Liu
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Fangrui Zheng
- Department of Chemistry
- Chinese University of Hong Kong
- Shatin, NT
- China
| | - Ka Ying Ma
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Yuk Man Li
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Lijun Wang
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Sun Wa Man
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Chengnan Zhang
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
| | - Zhen-Yu Chen
- Food & Nutritional Sciences Programme
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin, NT
- China
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33
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Liu Y, Guan L, Zhao Y, Lei L, Wang X, Ma KY, Li YM, Wang L, Man SW, Wang J, Huang Y, Chen ZY. Fatty acid moieties have little effect on cholesterol-lowering potency of plant sterol esters. EUR J LIPID SCI TECH 2014. [DOI: 10.1002/ejlt.201400444] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yuwei Liu
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Lei Guan
- R&D; Nestle; Beijing P. R. China
| | | | - Lin Lei
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Xiaobo Wang
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Ka Ying Ma
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Yuk Man Li
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Lijun Wang
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Sun Wa Man
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | | | - Yu Huang
- School of Biomedical Sciences; Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
| | - Zhen-Yu Chen
- Food & Nutritional Sciences Programme, School of Life Sciences; The Chinese University of Hong Kong; Shatin NT, Hong Kong, P. R. China
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34
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Lei L, Liu Y, Wang X, Jiao R, Ma KY, Li YM, Wang L, Man SW, Sang S, Huang Y, Chen ZY. Plasma cholesterol-lowering activity of gingerol- and shogaol-enriched extract is mediated by increasing sterol excretion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:10515-21. [PMID: 25290252 DOI: 10.1021/jf5043344] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The present study investigated the cholesterol-lowering activity of gingerol- and shogaol-enriched ginger extract (GSE). Thirty hamsters were divided into three groups and fed the control diet or one of the two experimental diets containing 0.5 and 1.0% GSE. Plasma total cholesterol, liver cholesterol, and aorta atherosclerotic plaque were dose-dependently decreased with increasing amounts of GSE added into diets. The fecal sterol analysis showed dietary GSE increased the excretion of both neutral and acidic sterols in a dose-dependent manner. GSE down-regulated the mRNA levels of intestinal Niemann-Pick C1-like 1 protein (NPC1L1), acyl CoA:cholesterol acyltransferase 2 (ACAT2), microsomal triacylglycerol transport protein (MTP), and ATP binding cassette transporter 5 (ABCG5), whereas it up-regulated hepatic cholesterol-7α-hydroxylase (CYP7A1). It was concluded that beneficial modification of the lipoprotein profile by dietary GSE was mediated by enhancing excretion of fecal cholesterol and bile acids via up-regulation of hepatic CYP7A1 and down-regulation of mRNA of intestinal NPC1L1, ACAT2, and MTP.
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Affiliation(s)
- Lin Lei
- Food and Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, NT, Hong Kong, China
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Guo CF, Li JY. A combination of Tween 80 with CaCl2 enhances the hypocholesterolemic activity of bile salt hydrolase-active Lactobacillus casei F0422 in rats fed a cholesterol-rich diet. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.04.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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36
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Hwang JY, Lee H, Ko A, Han CJ, Chung HW, Chang N. Dietary changes in Vietnamese marriage immigrant women: The KoGES follow-up study. Nutr Res Pract 2014; 8:319-26. [PMID: 24944778 PMCID: PMC4058567 DOI: 10.4162/nrp.2014.8.3.319] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 02/25/2014] [Accepted: 04/03/2014] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND/OBJECTIVES The immigrant population has grown considerably in South Korea since the early 1990s due to international marriages. Dietary changes in immigrants are an important issue, because they are related to health and disease patterns. This study was conducted to compare changes in dietary intake between baseline and follow-up periods. SUBJECTS/METHODS Two hundreds thirty three Vietnamese female married immigrants. Baseline data were collected during 2006-2009, and the follow-up data were collected during 2008 and 2010. Food consumption was assessed using a 1-day 24-hour recall. RESULTS The amount of the total food consumed (P < 0.001) including that of cereals (P = 0.004), vegetables (P = 0.003), and fruits (P = 0.002) decreased at follow-up compared to that at baseline, whereas consumption of milk and dairy products increased (P = 0.004). Accordingly, the overall energy and nutrient intake decreased at follow-up, including carbohydrates (P = 0.012), protein (P = 0.021), fiber (P = 0.008), iron (P = 0.009), zinc (P = 0.006), and folate (P = 0.002). Among various anthropometric and biochemical variables, mean skeletal muscle mass decreased (P = 0.012), plasma high density lipoprotein-cholesterol increased, (P = 0.020) and high sensitivity C-reactive protein decreased at follow-up (P < 0.001). CONCLUSIONS A long-term follow-up study is needed to investigate the association between changes in food and nutrient intake and anthropometric and biochemical variables in these Vietnamese female marriage immigrants.
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Affiliation(s)
- Ji-Yun Hwang
- Graduate School of Education, Sangmyung University, Seoul 110-743, Korea
| | - Hakim Lee
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Ahra Ko
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Chan-Jung Han
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Hye Won Chung
- Department of Obstetrics and Gynecology, Ewha Womans University School of Medicine, Seoul 158-710, Korea
| | - Namsoo Chang
- Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
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Ziar H, Gérard P, Riazi A. Effect of prebiotic carbohydrates on growth, bile survival and cholesterol uptake abilities of dairy-related bacteria. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:1184-1190. [PMID: 24037813 DOI: 10.1002/jsfa.6395] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 09/13/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Three strains of lactic acid bacteria and one probiotic Bifidobacterium strain sourced from milk origin were considered to select for the best synbiotic-like combination for cholesterol uptake ability. For that purpose, fermentative characteristics, bile salt hydrolase activity, bile survival and cholesterol removal were assessed in the presence of different carbohydrates. RESULTS Carbohydrate fermentability was highly variable among the different strains, and lactulose was the only prebiotic to favour growth of all strains, whereas pectin led to low population regardless of the strain. Bile survival of bacteria could be improved by the preferred carbon source and was related to their bile salt hydrolase activities. All together, our results showed that the most advantageous synbiotic-like combinations to achieve cholesterol uptake abilities were Lactobacillus delbrueckii subsp. bulgaricus LB 340 with raffinose, Streptococcus thermophilus TA040 or Lactobacillus rhamnosus LBRE-LSAS with lactulose, and Bifidobacterium animalis subsp. lactis Bb12 with mannitol. CONCLUSION The suggested synbiotics may represent new promising functional dairy additives.
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Affiliation(s)
- Hasnia Ziar
- Laboratoire des Micro-organismes bénéfiques, des Aliments Fonctionnels et de la Santé, Université Abdelhamid Ibn Badis, Mostaganem, 27000, Algeria; INRA, UMR1319 Micalis, F-78350, Jouy-en-Josas, France; AgroParisTech, UMR Micalis, F-78350, Jouy-en-Josas, France
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Chen J, Jiao R, Jiang Y, Bi Y, Chen ZY. Algal sterols are as effective as β-sitosterol in reducing plasma cholesterol concentration. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:675-681. [PMID: 24380496 DOI: 10.1021/jf404955n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The present study examined the cholesterol-lowering activity of sterol extract (SE) derived from alga Schizochytrium sp. and its interaction with gene expression of transporters, receptors, and enzymes involved in cholesterol absorption and metabolism. GC-MS analyses found that SE was a mixture of various sterols including lathosterol, ergosterol, stigmasterol, 24-ethylcholesta-5,7,22-trienol, stigmasta-7,24(24(1))-dien-3β-ol, and cholesterol. Results showed that SE at doses of 0.06 and 0.30 g/kg diet were able to decrease plasma cholesterol concentration by 19.5 and 34%, respectively, compared with the control, in hamsters maintained on a 0.1% high-cholesterol diet. SE at a dose of 0.30 g/kg diet was as effective as β-sitosterol in reducing plasma total cholesterol (TC). SE-induced reduction in plasma TC was accompanied by down-regulation of intestinal acyl-CoA:cholesterol acyltransferase 2 (ACAT2) and hepatic 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase and up-regulation of hepatic low-density lipoprotein (LDL) receptor. Addition of SE to the diet increased the excretion of total fecal sterols. It was concluded that SE possessed the same cholesterol-lowering activity as β-sitosterol and the underlying mechanisms were mediated by increasing sterol excretion and decreasing cholesterol absorption and synthesis.
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Affiliation(s)
- Jingnan Chen
- Lipids Technology and Engineering, School of Food Science and Engineering, Henan University of Technology , Lianhua Road, Zhengzhou, Henan, China
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Jiao R, Chen J, Peng C, Liang Y, Ma KY, Wang X, Liu Y, Lei L, Huang Y, Chen ZY. Cholesteryl ester species differently elevate plasma cholesterol in hamsters. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:11041-11047. [PMID: 24151965 DOI: 10.1021/jf4039293] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study was to examine the effect of free cholesterol (C) and individual cholesteryl ester (CE) species, namely cholesteryl palmitate (CP), cholesteryl stearate (CS), cholesteryl oleate (CO), and cholesteryl linoleate (CL) on plasma total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), non-HDL-C, and triacylglycerols (TG) in hamsters. Results showed that addition of dietary CE species into diet at 0.1% differently raised plasma TC concentrations, with CO elevating plasma TC to 331 mg/dL, while CS raised plasma TC only to 220 mg/dL. It was found that CS was a poor substrate of pancreatic cholesterol esterase, while CO was a good substrate. The fecal analysis showed CS-fed hamsters had the highest fecal cholesterol concentration, while RT-PCR analysis found CS feeding was associated with down-regulations of intestinal Niemann-Pick C1 like 1 (NPC1L1) and acyl-CoA: cholesterol acyltransferase 2 (ACAT2) as well as microsomal triacylglycerol transport protein (MTP). It was therefore concluded that the plasma cholesterol-raising activity of CE species was partially governed by their hydrolysis rates in the intestine, and the relative low raising activity associated with CS was mediated by down-regulation of intestinal NPC1L1, ACAT2, and MTP.
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Affiliation(s)
- Rui Jiao
- Food & Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong , Shatin, NT, Hong Kong, People's Republic of China
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Kim J, Hwang JY, Kim KN, Choi YJ, Chang N, Huh KB. Relationship between milk and calcium intake and lipid metabolism in female patients with type 2 diabetes. Yonsei Med J 2013; 54:626-36. [PMID: 23549807 PMCID: PMC3635625 DOI: 10.3349/ymj.2013.54.3.626] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE This study was conducted to determine the association between intake of milk and dairy products as well as calcium and biomarkers related to lipid metabolism in Korean female patients with type 2 diabetes. MATERIALS AND METHODS A cohort of 509 female subjects (mean age: 59.0 years; range: 35-80 years) was recruited from Huh's Diabetes Clinic in Seoul between 2005 and 2010. Dietary intake was assessed using a validated food-frequency questionnaire. Subjects were divided into three groups on the basis of their daily intake of milk and dairy products [<50 g/day (0<50 g/day), 50-200 g/day, and >200 g/day (>200-1201 g/day)] and then further divided into two groups according to their daily calcium intake: below and above the estimated average requirement (EAR). RESULTS After adjustment for age, body mass index, energy intake, exercise, use of nutritional supplements and cholesterol medication, the level of serum high-density lipoprotein (HDL)-cholesterol was significantly higher in subjects with milk and dairy products consumption of >200 g/day than in subjects in the other two groups. Those subjects with a milk and dairy products consumption of >200 g/day had significantly higher levels of apolipoprotein A-1 and a significantly lower atherogenic index than the other two groups. Patients with a calcium intake above the EAR exhibited a significantly greater serum HDL-cholesterol level than those with a calcium intake below the EAR. CONCLUSION Milk and dairy products, good sources of calcium, play a positive role in lipid profiles in female patients with type 2 diabetes.
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Affiliation(s)
- JaeHee Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Korea
| | - Ji-Yun Hwang
- The Graduate School of Education, Sangmyung University, Seoul, Korea
| | - Ki Nam Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Korea
| | - Young-Ju Choi
- The Huh's Diabetes Clinic & The 21C Diabetes and Vascular Research Institute, Seoul, Korea
| | - Namsoo Chang
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Korea
| | - Kap-Bum Huh
- The Huh's Diabetes Clinic & The 21C Diabetes and Vascular Research Institute, Seoul, Korea
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The role of the gut in reverse cholesterol transport--focus on the enterocyte. Prog Lipid Res 2013; 52:317-28. [PMID: 23608233 DOI: 10.1016/j.plipres.2013.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 03/01/2013] [Accepted: 04/10/2013] [Indexed: 11/20/2022]
Abstract
In the arterial intima, macrophages become cholesterol-enriched foam cells and atherosclerotic lesions are generated. This atherogenic process can be attenuated, prevented, or even reversed by HDL particles capable of initiating a multistep pathway known as the macrophage-specific reverse cholesterol transport. The macrophage-derived cholesterol released to HDL is taken up by the liver, secreted into the bile, and ultimately excreted in the feces. Importantly, the absorptive epithelial cells lining the lumen of the small intestine, the enterocytes, express several membrane-associated proteins which mediate the influx of luminal cholesterol and its subsequent efflux at their apical and basolateral sides. Moreover, generation of intestinal HDL and systemic effects of the gut microbiota recently revealed a direct link between the gut and the cholesterol cargo of peripheral macrophages. This review summarizes experimental evidence establishing that the reverse cholesterol transport pathway which initiates in macrophages is susceptible to modulation in the small intestine. We also describe four paths which govern cholesterol passage across the enterocyte and define a role for the gut in the regulation of reverse cholesterol transport. Understanding the concerted function of these paths may be useful when designing therapeutic strategies aimed at removing cholesterol from the foam cells which occupy atherosclerotic lesions.
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Li S, Li Y, Ning H, Na L, Niu Y, Wang M, Feng R, Liu L, Guo F, Hou S, Chu X, Wang Y, Zhang Y, Zhang H, Huang L, Bi M, Huang Y, Hao L, Zhao Y, Wang C, Wang Y, He Y, Sun C. Calcium supplementation increases circulating cholesterol by reducing its catabolism via GPER and TRPC1-dependent pathway in estrogen deficient women. Int J Cardiol 2013; 168:2548-60. [PMID: 23602294 DOI: 10.1016/j.ijcard.2013.03.057] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/23/2013] [Accepted: 03/17/2013] [Indexed: 12/29/2022]
Abstract
BACKGROUND Limited studies have addressed the effects of calcium supplementation (CaS) on serum total cholesterol (TC) in postmenopausal women and the results are inconclusive. Moreover, the potential mechanisms through which CaS regulates cholesterol metabolism in the absence of estrogen are still sealed for the limitation of human being study. METHODS Cross-sectional survey, animal and in vitro experiments were conducted to investigate the effect of CaS on endogenous cholesterol metabolism in estrogen deficiency and identify its potential mechanisms. Ovariectomized rats were used to mimic estrogen deficiency. In vitro, HepG2 cell line was exposed to estradiol and/or calcium treatment. RESULTS We demonstrated that CaS significantly increased serum TC and the risk of hypercholesterolemia and myocardial infarction in postmenopausal women. Increased serum TC in estrogen deficiency was caused mainly by decreased cholesterol catabolism rather than increased synthesis. This was mediated by reduced 7α-hydroxylase resulting from increased liver intracellular Ca(2+) concentrations, reduced intracellular basal cAMP and subsequent up-regulation of SREBP-1c and SHP expression. Estrogen had a protective role in preventing CaS-induced TC increase by activating the G-protein coupled estrogen receptor, which mediated the estrogen effect through the transient receptor potential canonical 1 cation channel. CONCLUSIONS CaS increases endogenous serum TC via decreasing hepatic cholesterol catabolism in estrogen deficiency. G-protein coupled estrogen receptor is shown to be a key target in mediating CaS-induced TC increase. CaS should be monitored for the prevention of serum TC increase during menopause.
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Affiliation(s)
- Songtao Li
- Department of Nutrition and Food Hygiene, Public Health College, Harbin Medical University, Harbin, China
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Liang Y, Chen J, Zuo Y, Ma KY, Jiang Y, Huang Y, Chen ZY. Blueberry anthocyanins at doses of 0.5 and 1 % lowered plasma cholesterol by increasing fecal excretion of acidic and neutral sterols in hamsters fed a cholesterol-enriched diet. Eur J Nutr 2013; 52:869-75. [PMID: 22684634 DOI: 10.1007/s00394-012-0393-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 05/25/2012] [Indexed: 10/28/2022]
Abstract
PURPOSE The present study investigated the underlying mechanism associated with the hypocholesterolemic activity of blueberry anthocyanins by examining its effect on fecal sterol excretion and gene expression of major receptors, enzymes, and transporters involved in cholesterol metabolism. METHODS Hamsters were divided into three groups and fed a 0.1 % cholesterol diet containing 0 % (CTL), 0.5 % (BL), and 1.0 % (BH) blueberry anthocyanins, respectively, for six weeks. Plasma total cholesterol (TC), triacylglycerols (TAG), and non-high-density lipoproteins cholesterol (non-HDL-C) were measured using the enzymatic kits, and the gene expression of transporters, enzymes, and receptors involved in cholesterol absorption and metabolism was quantified using the quantitative PCR. GC analysis was used to quantify hepatic cholesterol and fecal acidic and neutral sterols. RESULTS Dietary supplementation of 0.5 and 1.0 % blueberry anthocyanins for 6 weeks decreased plasma TC concentration by 6-12 % in a dose-dependent manner. This was accompanied by increasing the excretion of fecal neutral and acidic sterols by 22-29 % and 41-74 %, respectively. Real-time PCR analyses demonstrated that incorporation of blueberry anthocyanins into diet down-regulated the genes of NPC1L1, ACAT-2, MTP, and ABCG 8. In addition, blueberry anthocyanins were also able to down-regulate the gene expression of hepatic HMG-CoA reductase. CONCLUSION The cholesterol-lowering activity of blueberry anthocyanins was most likely mediated by enhancing the excretion of sterols accompanied with down-regulation on gene expression of intestinal NPC1L1, ACAT-2, MTP, and ABCG 8.
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Affiliation(s)
- Yintong Liang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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Xing WJ, Gao L, Zhao JJ. Expression and regulation of cholesterol 7 alpha-hydroxylase: An update. Shijie Huaren Xiaohua Zazhi 2012; 20:1439-1446. [DOI: 10.11569/wcjd.v20.i16.1439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Cholesterol 7-alpha hydroxylase (CYP7A1) is the first and rate-limiting enzyme in the neutral pathway of bile acids synthesis. The expression of CYP7A1 can be regulated not only by diurnal rhythm, but also by gene polymorphism, diet, hormones, cytokines and drugs. CYP7A1 gene polymorphism is associated not only with some diseases but also with response to drug therapy. A cascade network consisting of multiple nuclear receptors is involved in the regulation of CYP7A1 expression to control bile acid synthesis and lipid metabolism.
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Chen J, Jiang Y, Liang Y, Tian X, Peng C, Ma KY, Liu J, Huang Y, Chen ZY. DPA n-3, DPA n-6 and DHA improve lipoprotein profiles and aortic function in hamsters fed a high cholesterol diet. Atherosclerosis 2012; 221:397-404. [DOI: 10.1016/j.atherosclerosis.2012.01.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 12/01/2011] [Accepted: 01/03/2012] [Indexed: 02/05/2023]
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46
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Capsaicinoids lower plasma cholesterol and improve endothelial function in hamsters. Eur J Nutr 2012; 52:379-88. [DOI: 10.1007/s00394-012-0344-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 03/13/2012] [Indexed: 11/30/2022]
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The chylomicron: relationship to atherosclerosis. Int J Vasc Med 2011; 2012:784536. [PMID: 22007304 PMCID: PMC3189596 DOI: 10.1155/2012/784536] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 08/08/2011] [Indexed: 12/20/2022] Open
Abstract
The B-containing lipoproteins are the transporters of cholesterol, and the evidence suggests that the apo B48-containing postprandial chylomicron particles and the triglyceride-rich very low density lipoprotein (VLDL) particles play an important part in the development of the plaque both directly and indirectly by their impact on LDL composition. The ratio of dietary to synthesised cholesterol is variable but tightly regulated: hence intervention with diet at best reduces serum cholesterol by <20% andusually <10%. Statins are the mainstay of cholesterol reduction therapy, but they increase cholesterol absorption, an example of the relationship between synthesis and absorption. Inhibition of cholesterol absorption with Ezetimibe, an inhibitor of Niemann Pick C1-like 1 (NPC1-L1), the major regulator of cholesterol absorption, increases cholesterol synthesis and hence the value of adding an inhibitor of cholesterol absorption to an inhibitor of cholesterol synthesis. Apo B48, the structural protein of the chylomicron particle, is synthesised in abundance so that the release of these particles is dependent on the amount of cholesterol and triglyceride available in the intestine. This paper will discuss cholesterol absorption and synthesis, chylomicron formation, and the effect of postprandial lipoproteins on factors involved in atherosclerosis.
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Chen J, Jiang Y, Ma KY, Chen F, Chen ZY. Microalga decreases plasma cholesterol by down-regulation of intestinal NPC1L1, hepatic LDL receptor, and HMG-CoA reductase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:6790-6797. [PMID: 21561085 DOI: 10.1021/jf200757h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The present study examined the cholesterol-lowering activity of algal powder (AP), algal lipids (AL), and algal residue (AR) and their interaction with genes of transporters, receptors, and enzymes involved in cholesterol absorption and metabolism. In this experiment, 48 hamsters were fed either control diet or one of the three experimental diets containing 2% AP, 1.0% AL, or 1.0% AR for 6 weeks. Plasma total cholesterol (TC) and non-high-density-lipoprotein-cholesterol (non-HDL-C) were significantly decreased in the AP and AL groups but not in the AR group compared with those in the control hamsters. It was found that the cholesterol-lowering activity of AP and AL was associated with down-regulation of hepatic 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase, low-density lipoprotein receptor (LDLR), and intestinal Niemann-Pick C1-like 1 (NPC1L1) transporter. It was concluded that the alga possessed the cholesterol-lowering activity and its lipids were the active ingredients. The mechanisms underlying the cholesterol-lowering activity of algae were mediated most likely by increasing the sterol excretion and decreasing the cholesterol absorption and synthesis.
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Affiliation(s)
- Jingnan Chen
- Kwong Living Trust Food Safety and Analysis Laboratory and Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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Effect of phytosterols and their oxidation products on lipoprotein profiles and vascular function in hamster fed a high cholesterol diet. Atherosclerosis 2011; 219:124-33. [PMID: 21719014 DOI: 10.1016/j.atherosclerosis.2011.06.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 05/23/2011] [Accepted: 06/02/2011] [Indexed: 12/13/2022]
Abstract
Human diets contain phytosterols and their oxidation products. We investigated effect of β-sitosterol (Si), stigmasterol (St), β-sitosterol oxidation products (SiOP) and stigmasterol oxidation products (StOP) on plasma total cholesterol and their interaction with the gene expression of enzymes, proteins and transporters involved in cholesterol absorption and metabolism. Sixty male hamsters were fed the control diet or one of four experimental diets containing 0.1% Si, 0.1% SiOP, 0.1% St and 0.1% StOP, respectively, for six weeks. SiOP and StOP groups had the relative liver weights greater than their corresponding non-oxidized forms, indicating they were possibly toxic. Results showed both Si and St groups reduced while SiOP and StOP hamsters lost the capacity of lowering plasma total cholesterol (TC), low-density lipoprotein cholesterol (LDL) and triacylglycerols (TG) compared with the control group. Si and St but not SiOP and StOP were anti-atherosclerotic. RT-PCR analysis demonstrated Si and St but not SiOP and StOP down-regulated mRNA levels of intestinal acyl CoA: cholesterol acyltransferase (ACAT2) and microsomal triglyceride protein (MTP). Aortas from Si and St hamsters relaxed better than those from the control and their corresponding SiOP and StOP-treated hamsters. It was concluded that Si and St not SiOP and StOP were beneficial in improving lipoprotein profile and aortic function.
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Mackrill JJ. Oxysterols and calcium signal transduction. Chem Phys Lipids 2011; 164:488-95. [PMID: 21513705 DOI: 10.1016/j.chemphyslip.2011.04.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 04/04/2011] [Accepted: 04/06/2011] [Indexed: 12/31/2022]
Abstract
Ionised calcium (Ca(2+)) is a key second messenger, regulating almost every cellular process from cell death to muscle contraction. Cytosolic levels of this ion can be increased via gating of channel proteins located in the plasma membrane, endoplasmic reticulum and other membrane-delimited organelles. Ca(2+) can be removed from cells by extrusion across the plasma membrane, uptake into organelles and buffering by anionic components. Ca(2+) channels and extrusion mechanisms work in concert to generate diverse spatiotemporal patterns of this second messenger, the distinct profiles of which determine different cellular outcomes. Increases in cytoplasmic Ca(2+) concentration are one of the most rapid cellular responses upon exposure to certain oxysterol congeners or to oxidised low-density lipoprotein, occurring within seconds of addition and preceding increases in levels of reactive oxygen species, or changes in gene expression. Furthermore, exposure of cells to oxysterols for periods of hours to days modulates Ca(2+) signal transduction, with these longer-term alterations in cellular Ca(2+) homeostasis potentially underlying pathological events within atherosclerotic lesions, such as hyporeactivity to vasoconstrictors observed in vascular smooth muscle, or ER stress-induced cell death in macrophages. Despite their candidate roles in physiology and disease, little is known about the molecular mechanisms that couple changes in oxysterol concentrations to alterations in Ca(2+) signalling. This review examines the ways in which oxysterols could influence Ca(2+) signal transduction and the potential roles of this in health and disease.
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Affiliation(s)
- John J Mackrill
- Department of Physiology, University College Cork, Cork, Ireland.
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