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Berkowitz L, Salazar C, Ryff CD, Coe CL, Rigotti A. Serum sphingolipid profiling as a novel biomarker for metabolic syndrome characterization. Front Cardiovasc Med 2022; 9:1092331. [PMID: 36578837 PMCID: PMC9791223 DOI: 10.3389/fcvm.2022.1092331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 11/25/2022] [Indexed: 12/14/2022] Open
Abstract
Background Sphingolipids are components of cell membrane structure, but also circulate in serum and are essential mediators of many cellular functions. While ceramides have been proposed previously as a useful biomarker for cardiometabolic disease, the involvement of other sphingolipids is still controversial. The aim of this study was to investigate the cross-sectional association between blood sphingolipidomic profiles and metabolic syndrome (MetS) as well as other atherosclerotic risk factors in a large population-based study in the U.S. Methods Clinical data and serum sphingolipidomic profiling from 2,063 subjects who participated in the biomarker project of the Midlife in the United States (MIDUS) study were used. Results Consistent with previous reports, we found a positive association between most ceramide levels and obesity, atherogenic dyslipidemia, impaired glucose metabolism, and MetS prevalence. In contrast, most simple β-glycosphingolipids (i.e., hexosylceramides and lactosylceramides) were inversely associated with dysmetabolic biomarkers. However, this latter sphingolipid class showed a positive link with inflammatory and vascular damage-associated biomarkers in subjects with MetS. Through metabolic network analysis, we found that the relationship between ceramides and simple β-glycosphingolipids differed significantly not only according to MetS status, but also with respect to the participants' C-reactive protein levels. Conclusion Our findings suggest that a comprehensive sphingolipid profile is more informative about MetS than ceramides alone, and it may reveal new insights into the pathophysiology and further diabetic vs. cardiovascular risk in patients with MetS.
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Affiliation(s)
- Loni Berkowitz
- Center of Molecular Nutrition and Chronic Diseases, Department of Nutrition, Diabetes and Metabolism, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile,*Correspondence: Loni Berkowitz
| | - Cristian Salazar
- Center of Molecular Nutrition and Chronic Diseases, Department of Nutrition, Diabetes and Metabolism, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Carol D. Ryff
- Institute on Aging, University of Wisconsin-Madison, Madison, WI, United States
| | - Christopher L. Coe
- Institute on Aging, University of Wisconsin-Madison, Madison, WI, United States
| | - Attilio Rigotti
- Center of Molecular Nutrition and Chronic Diseases, Department of Nutrition, Diabetes and Metabolism, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
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Sen Sarma M, Tripathi PR. Natural history and management of liver dysfunction in lysosomal storage disorders. World J Hepatol 2022; 14:1844-1861. [PMID: 36340750 PMCID: PMC9627439 DOI: 10.4254/wjh.v14.i10.1844] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/21/2022] [Accepted: 09/21/2022] [Indexed: 02/06/2023] Open
Abstract
Lysosomal storage disorders (LSD) are a rare group of genetic disorders. The major LSDs that cause liver dysfunction are disorders of sphingolipid lipid storage [Gaucher disease (GD) and Niemann-Pick disease] and lysosomal acid lipase deficiency [cholesteryl ester storage disease and Wolman disease (WD)]. These diseases can cause significant liver problems ranging from asymptomatic hepatomegaly to cirrhosis and portal hypertension. Abnormal storage cells initiate hepatic fibrosis in sphingolipid disorders. Dyslipidemia causes micronodular cirrhosis in lipid storage disorders. These disorders must be keenly differentiated from other chronic liver diseases and non-alcoholic steatohepatitis that affect children and young adults. GD, Niemann-Pick type C, and WD also cause neonatal cholestasis and infantile liver failure. Genotype and liver phenotype correlation is variable in these conditions. Patients with LSD may survive up to 4-5 decades except for those with neonatal onset disease. The diagnosis of all LSD is based on enzymatic activity, tissue histology, and genetic testing. Enzyme replacement is possible in GD and Niemann-Pick types A and B though there are major limitations in the outcome. Those that progress invariably require liver transplantation with variable outcomes. The prognosis of Niemann-Pick type C and WD is universally poor. Enzyme replacement therapy has a promising role in cholesteryl ester storage disease. This review attempts to outline the natural history of these disorders from a hepatologist’s perspective to increase awareness and facilitate better management of these rare disorders.
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Affiliation(s)
- Moinak Sen Sarma
- Department of Pediatric Gastroenterology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow 226014, India
| | - Parijat Ram Tripathi
- Department of Pediatric Gastroenterology, Ankura Hospital for Women and Children, Hyderabad 500072, India
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Adar T, Ya'acov AB, Shabat Y, Mizrahi M, Zolotarov L, Lichtenstein Y, Ilan Y. Steroid-mediated liver steatosis is CD1d-dependent, while steroid-induced liver necrosis, inflammation, and metabolic changes are CD1d-independent. BMC Gastroenterol 2022; 22:169. [PMID: 35392825 PMCID: PMC8991564 DOI: 10.1186/s12876-022-02242-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/24/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction Glucocorticoids contribute to the pathogenesis of non-alcoholic fatty liver disease (NAFLD). Natural killer T cells play a role in the pathogenesis of NAFLD and response to steroids. The present study aimed to determine the role of CD1d in steroid-mediated metabolic derangement and the steroid-protective effect of glycosphingolipids. Methods Ten groups of mice were studied. Steroids were orally administered to C57BL/6 mice to assess the therapeutic effect of β-glucosylceramide (GC) on the development of steroid-mediated liver damage and metabolic derangements. The role of CD1d in the pathogenesis of steroid-induced liver damage and in mediating the hepatoprotective effect of GC was studied in CD1d−/− mice. Results A model of oral administration of steroids was established, resulting in insulin resistance, hyperinsulinemia, hypertriglyceridemia, liver steatosis, and hepatocellular injury. Steroid administration to CD1d−/− mice was associated with hyperglycemia and hypertriglyceridemia. However, CD1d−/− mice did not manifest marked steroid-induced steatosis. GC treatment alleviated steroid-associated metabolic derangements and liver injury independent of CD1d expression. Conclusion A steroid-mediated model of NAFLD and metabolic derangements was established in which steroid-mediated steatosis was CD1d-dependent while steroid-induced liver necrosis, inflammation, and metabolic changes were CD1d-independent, which may support a dichotomy between steatosis and steatohepatitis in NAFLD. Supplementary Information The online version contains supplementary material available at 10.1186/s12876-022-02242-9.
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Affiliation(s)
- Tomer Adar
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel.,Digestive Disease Institute, Shaare-Zedek Medical Center, Jerusalem, Israel
| | - Ami Ben Ya'acov
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel.,Digestive Disease Institute, Shaare-Zedek Medical Center, Jerusalem, Israel
| | - Yehudit Shabat
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel
| | - Meir Mizrahi
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel
| | - Lida Zolotarov
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel
| | - Yoav Lichtenstein
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel
| | - Yaron Ilan
- Faculty of Medicine, Department of Medicine, Hadassah Medical Center, Hebrew University, POB 1200, 91120, Jerusalem, Israel.
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Berkowitz L, Cabrera-Reyes F, Salazar C, Ryff CD, Coe C, Rigotti A. Sphingolipid Profiling: A Promising Tool for Stratifying the Metabolic Syndrome-Associated Risk. Front Cardiovasc Med 2022; 8:785124. [PMID: 35097004 PMCID: PMC8795367 DOI: 10.3389/fcvm.2021.785124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/21/2021] [Indexed: 11/24/2022] Open
Abstract
Metabolic syndrome (MetS) is a multicomponent risk condition that reflects the clustering of individual cardiometabolic risk factors related to abdominal obesity and insulin resistance. MetS increases the risk for cardiovascular diseases (CVD) and type 2 diabetes mellitus (T2DM). However, there still is not total clinical consensus about the definition of MetS, and its pathophysiology seems to be heterogeneous. Moreover, it remains unclear whether MetS is a single syndrome or a set of diverse clinical conditions conferring different metabolic and cardiovascular risks. Indeed, traditional biomarkers alone do not explain well such heterogeneity or the risk of associated diseases. There is thus a need to identify additional biomarkers that may contribute to a better understanding of MetS, along with more accurate prognosis of its various chronic disease risks. To fulfill this need, omics technologies may offer new insights into associations between sphingolipids and cardiometabolic diseases. Particularly, ceramides –the most widely studied sphingolipid class– have been shown to play a causative role in both T2DM and CVD. However, the involvement of simple glycosphingolipids remains controversial. This review focuses on the current understanding of MetS heterogeneity and discuss recent findings to address how sphingolipid profiling can be applied to better characterize MetS-associated risks.
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Affiliation(s)
- Loni Berkowitz
- Department of Nutrition, Diabetes and Metabolism & Center of Molecular Nutrition and Chronic Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- *Correspondence: Loni Berkowitz
| | - Fernanda Cabrera-Reyes
- Department of Gastroenterology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Cristian Salazar
- Department of Nutrition, Diabetes and Metabolism & Center of Molecular Nutrition and Chronic Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Carol D. Ryff
- Institute on Aging, University of Wisconsin-Madison, Madison, WI, United States
| | - Christopher Coe
- Institute on Aging, University of Wisconsin-Madison, Madison, WI, United States
| | - Attilio Rigotti
- Department of Nutrition, Diabetes and Metabolism & Center of Molecular Nutrition and Chronic Diseases, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
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Yang JY, Zhang TT, Dong Z, Shi HH, Xu J, Mao XZ, Wang YM, Xue CH. Dietary Supplementation with Exogenous Sea-Cucumber-Derived Ceramides and Glucosylceramides Alleviates Insulin Resistance in High-Fructose-Diet-Fed Rats by Upregulating the IRS/PI3K/Akt Signaling Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:9178-9187. [PMID: 33560835 DOI: 10.1021/acs.jafc.0c06831] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Endogenous ceramide is considered to be associated with the progress of insulin resistance. However, the effects of dietary exogenous glucosylceramides and ceramides on insulin resistance are unclear. A model of fructose-induced male Sprague Dawley rats was used to compare the effects of sea-cucumber-derived glucosylceramides and ceramides on insulin resistance. Both glucosylceramides and ceramides significantly improved glucose tolerance, reduced the concentrations of serum glucose and glycosylated hemoglobin, and alleviated the accompanied hypertension. Ceramides significantly enhanced glycogen levels in skeletal muscle, whereas glucosylceramides significantly increased the hepatic glycogen levels. Moreover, glucosylceramides alleviated insulin resistance by inhibiting gluconeogenesis, promoting glycogen synthesis and insulin signal transduction in the liver; meanwhile, ceramides were mainly due to the promotion of glycogen synthesis and insulin signal transduction in skeletal muscle. Additionally, glucosylceramides and ceramides effectively attenuated inflammation in adipose tissue. These results indicate that glucosylceramides and ceramides have potential value in the prevention and alleviation of insulin resistance.
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Affiliation(s)
- Jin-Yue Yang
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Tian-Tian Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Zhe Dong
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Hao-Hao Shi
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Xiang-Zhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
- Laboratory of Marine Drugs & Biological Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, Shandong 266237, People's Republic of China
| | - Yu-Ming Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
- Laboratory of Marine Drugs & Biological Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, Shandong 266237, People's Republic of China
| | - Chang-Hu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
- Laboratory of Marine Drugs & Biological Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, Shandong 266237, People's Republic of China
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A synergistic effect of Ambroxol and Beta-Glucosylceramide in alleviating immune-mediated hepatitis: A novel immunomodulatory non-immunosuppressive formulation for treatment of immune-mediated disorders. Biomed Pharmacother 2020; 132:110890. [DOI: 10.1016/j.biopha.2020.110890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 09/30/2020] [Accepted: 10/12/2020] [Indexed: 12/12/2022] Open
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7
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Jové M, Tibau J, Serrano JCE, Berdún R, Rodríguez-Palmero M, Font-i-Furnols M, Cassanyé A, Rodriguez-Mortera R, Sol J, Rassendren H, Fàbrega E, Crescenti A, Castell A, Sabater M, Ortega FJ, Martin-Gari M, Quintanilla R, Puigjaner J, Moreno JA, Prat J, Arola L, Fernández-Real JM, Pamplona R, Portero-Otin M. Molecular phenomics of a high-calorie diet-induced porcine model of prepubertal obesity. J Nutr Biochem 2020; 83:108393. [DOI: 10.1016/j.jnutbio.2020.108393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 03/05/2020] [Accepted: 04/02/2020] [Indexed: 12/12/2022]
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8
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Adar T, Shankar Lankalapalli R, Bittman R, Ilan Y. The assembly of glycosphingolipid determines their immunomodulatory effect: A novel method for structure-based design of immunotherapy. Cell Immunol 2020; 355:104157. [PMID: 32659503 DOI: 10.1016/j.cellimm.2020.104157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/27/2020] [Accepted: 07/01/2020] [Indexed: 11/18/2022]
Abstract
Structure-activity relationships provide insight into the binding interactions of beta-glycosphingolipids (GSLs) with both the TCR and the CD1d molecules, as well as the subsequent immunologic response of regulatory NKT cells. AIM To determine the effects of synthetic GSL structures on their immune modulatory functions. METHODS GSLs of various structures were tested in vitro and in an animal model of Concanavalin A (ConA) immune-mediated hepatitis. RESULTS In vitro, using SV40 binding to live monkey CV1 cells, the l-threo stereoisomer of C8-β-LacCer inhibits caveolar internalization, reducing viral binding to the cell surface. In vivo, in the ConA model, LR172, which has a saturated C8 chain, and LR178, which has a trans double bond at C-2 in the C8 chain, suppressed the immune-mediated liver inflammation and reduced IFNγ levels in a dose dependent manner. The beneficial effects of LR172 and of LR178 are associated with suppression of liver apoptosis, increased phosphorylated STAT3 expression in the liver, and an increase in the NKT liver/spleen ratio. SUMMARY The assembly of GSLs determines their immunomodulatory effect and can serve as a method for structure-based design of immunotherapy.
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Affiliation(s)
- Tomer Adar
- Department of Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Ravi Shankar Lankalapalli
- Department of Chemistry & Biochemistry, Queens College of the City University of New York, United States; Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India
| | - Robert Bittman
- Department of Chemistry & Biochemistry, Queens College of the City University of New York, United States
| | - Yaron Ilan
- Department of Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel.
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9
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Ishay Y, Nachman D, Khoury T, Ilan Y. The role of the sphingolipid pathway in liver fibrosis: an emerging new potential target for novel therapies. Am J Physiol Cell Physiol 2020; 318:C1055-C1064. [PMID: 32130072 DOI: 10.1152/ajpcell.00003.2020] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sphingolipids (SL) are a family of bioactive lipids and a major cellular membrane structural component. SLs include three main compounds: ceramide (Cer), sphingosine (Sp), and sphingosine-1-phosphate (S-1P), all of which have emerging roles in biological functions in cells, especially in the liver. They are under investigation in various liver diseases, including cirrhosis and end-stage liver disease. In this review, we provide an overview on the role of SLs in liver pathobiology and focus on their potential role in the development of hepatic fibrosis. We describe recent evidence and suggest SLs are a promising potential therapeutic target for the treatment of liver disease and fibrosis.
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Affiliation(s)
- Yuval Ishay
- Department of Internal Medicine A, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Dean Nachman
- Department of Internal Medicine A, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Tawfik Khoury
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Yaron Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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Mizrahi M, Ben Ya'acov A, Adar T, Levy Sklair M, Gaska S, Ilan Y. Oral Administration ofHoodia parvifloraAlleviates Insulin Resistance and Nonalcoholic Steatohepatitis. J Med Food 2019; 22:1189-1198. [DOI: 10.1089/jmf.2019.0093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Meir Mizrahi
- Gastroenterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Ami Ben Ya'acov
- Gastroenterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Tomer Adar
- Gastroenterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Miriam Levy Sklair
- Department of Radiology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Svetlana Gaska
- Goldyne Savad Institute of Gene Therapy, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Yaron Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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11
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Jang H, Lim S, Kim J, Yoon S, Lee CY, Hwang H, Shin JW, Shin KJ, Kim HY, Park KI, Nam D, Lee JY, Yea K, Hirabayashi Y, Lee YJ, Chae YC, Suh P, Choi JH. Glucosylceramide synthase regulates adipo‐osteogenic differentiation through synergistic activation of PPARγ with GlcCer. FASEB J 2019; 34:1270-1287. [DOI: 10.1096/fj.201901437r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 10/23/2019] [Accepted: 10/30/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Hyun‐Jun Jang
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Seyoung Lim
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Jung‐Min Kim
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Sora Yoon
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Chae Young Lee
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Hyeon‐Jeong Hwang
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Jeong Woo Shin
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Kyeong Jin Shin
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Hye Yun Kim
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Kwang Il Park
- Korean Medicine (KM) Application Center Korea Institute of Oriental Medicine Daegu Republic of Korea
| | - Dougu Nam
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Ja Yil Lee
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Kyungmoo Yea
- Department of New Biology DGIST Daegu Republic of Korea
| | | | - Yu Jin Lee
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Young Chan Chae
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Pann‐Ghill Suh
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
| | - Jang Hyun Choi
- School of Life Sciences Ulsan National Institute of Science and Technology Ulsan Republic of Korea
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Zhou J, Yang Y, Wang H, Bian B, Yang J, Wei X, Zhou Y, Si N, Zhao H. The Disturbance of Hepatic and Serous Lipids in Aristolochic Acid Ι Induced Rats for Hepatotoxicity Using Lipidomics Approach. Molecules 2019; 24:E3745. [PMID: 31627392 PMCID: PMC6832582 DOI: 10.3390/molecules24203745] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/09/2019] [Accepted: 10/14/2019] [Indexed: 12/25/2022] Open
Abstract
Aristolochic acid I (AAI) was regarded as the major toxic component of aristolochic acid (AA). In addition to aristolochic acid nephropathy (AAN), liver cancers induced by AAI has aroused increasing attention recently. In this paper, the discovery of diagnostic biomarkers for AAI-induced liver injury has been studied, especially for the lipid markers. From the histopathological characteristics, the injury was observed clearly in the liver apart from the kidney after 30 mg/kg of AAΙ treatment for one week, while the lesion alleviated after AAΙ discontinuance. The serum biochemical indexes were manifested to the normal tendency after AAΙ discontinuance for two weeks. According to the evaluation of pathology slices and serum biochemical indexes, they indicated that the hepatotoxicity induced by AAΙ was reversible to some extent. A total of 44 lipid markers were identified in the liver, as well as 59 in the serum. Twenty-six common lipid markers were observed in both serum and liver. Furthermore, nine out of 26 lipids exhibited the excellent diagnostic ability to differentiate the control group from the AAΙ group and AAΙ discontinuance group with high sensitivity and specificity. The changed lipid markers might serve as characteristics to explain the mechanisms of pathogenesis and progression in hepatotoxicity induced by AAΙ.
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Affiliation(s)
- Junyi Zhou
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Yifei Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Hongjie Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Baolin Bian
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Jian Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Xiaolu Wei
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Yanyan Zhou
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Nan Si
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Haiyu Zhao
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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13
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Torelli Hijo AH, Coutinho CP, Alba-Loureiro TC, Moreira Leite JS, Bargi-Souza P, Goulart-Silva F. High fat diet modulates the protein content of nutrient transporters in the small intestine of mice: possible involvement of PKA and PKC activity. Heliyon 2019; 5:e02611. [PMID: 31667423 PMCID: PMC6812199 DOI: 10.1016/j.heliyon.2019.e02611] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 07/23/2019] [Accepted: 10/03/2019] [Indexed: 12/22/2022] Open
Abstract
Aims Chronic high fat consumption has been shown to modulate nutrient transporter content in the intestine of obese mice; however it is unclear if this regulation occurs before or after the establishment of obesity, and the underlying molecular mechanism requires elucidation. Main methods Towards this goal C57BL/6 mice were fed a low fat diet (LFD) or high fat diet (HFD), and specific protein and gene expression levels were assessed for up to 12 weeks. Similar experiments were also performed with leptin-deficient (Ob/Ob) mice. Key findings The results showed that the HFD group presented decreased GLUT2, PEPT1, FAT/CD36 and NPC1L1, and increased NHE3, MTTP and L-FABP content. Animals fed an HFD also presented enhanced lipid transporter gene expression of Slc27a4, Npc1l1, Cd36, Mttp and L-Fabp. Additionally, FAT/CD36 and NPC1L1 protein levels were reduced in both HFD-induced obese and Ob/Ob mice. Ob/Ob mice also exhibited increased Slc2a2 and Slc15a1 mRNAs expression, but the protein expression levels remained unchanged. The HFD also attenuated PKA and PKC activities. The inhibition of PKA was associated with decreased FAT/CD36 content, whereas increased L-FABP levels likely depend on CREB activation, independent of PKA. It is plausible that the HFD-induced changes in NPC1L1, MTTP and L-FABP protein content involve regulation at the level of transcription. Moreover, the changes in GLUT2 and PEPT1 content might be associated with low PKC activity. Significance The results indicated that an HFD is capable of reducing nutrient transporter content, possibly attenuating nutrient uptake into the intestine, and may represent a feedback mechanism for regulating body weight. Furthermore, the elevated levels of NHE3, L-FABP and MTTP may account for the increased prevalence of hypertension and dyslipidemia in obese individuals. All of these changes are potentially linked to reduced PKA or PKC activities.
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Affiliation(s)
| | - Camille Perella Coutinho
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | | | | | - Paula Bargi-Souza
- Department of Physiology and Biophysics, Institute of Biological Science, Federal University of Minas Gerais, Brazil
| | - Francemilson Goulart-Silva
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
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14
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Ilan Y. β-Glycosphingolipids as Mediators of Both Inflammation and Immune Tolerance: A Manifestation of Randomness in Biological Systems. Front Immunol 2019; 10:1143. [PMID: 31178868 PMCID: PMC6538797 DOI: 10.3389/fimmu.2019.01143] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 05/07/2019] [Indexed: 12/27/2022] Open
Abstract
Plasticity in biological systems is attributed to the combination of multiple parameters which determine function. These include genotypic, phenotypic, and environmental factors. While biological processes can be viewed as ordered and sequential, biological randomness was suggested to underline part of them. The present review looks into the concept of randomness in biological systems by exploring the glycosphingolipids-NKT cells example. NKT cells are a unique subset of regulatory lymphocytes which play a role in both inflammation and tolerance. Glycosphingolipids promote an immune balance by changing different arms of the immune system in opposing environments. Traditional immunology looks at skewing the immune system into different directions by different types of activation of the same cell stimulation of different cells subsets, use of different ligands, or different the effect of different immune environments. While these may explain some of the effects, the lack of consistency and opposing results under similar settings may involve randomness which may also be part of real life effects of immunomodulatory agents. It means that several of the biological processes, cannot be explained by simple linear models, and may involve more complex concepts. The application for these concepts for improving therapies to patients with Gaucher disease are discussed. SUMMARY The use of different ligands that target a variety of cell subsets in different immune environments may underlie differences in the functionality of NKT cells and their variability in response to NKT-based therapies. The novel concept of randomness in biology means that several biological processes cannot be solely explained by simple linear models and may instead involve much more complicated schemes of random disorder. These may have implications on future design of therapeutic regimens for improving the response to current treatments.
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Affiliation(s)
- Yaron Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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15
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Drori A, Rotnemer-Golinkin D, Zolotarov L, Ilan Y. Oral Administration of CardioAid and Lunasin Alleviates Liver Damage in a High-Fat Diet Nonalcoholic Steatohepatitis Model. Digestion 2018; 96:110-118. [PMID: 28796993 DOI: 10.1159/000479734] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 07/20/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND Several of the drugs in development for treatment of nonalcoholic steatohepatitis (NASH) target liver fibrosis or have side effects that prohibit their long-term use in patients with mild to moderate disease. Lunasin is a soy-derived peptide with anti-inflammatory properties. ADM's CardioAid™ is a plant sterol extract that exerts cholesterol- and triacylglycerol-lowering effects. AIM To determine the immunomodulatory effects of CardioAid and lunasin in a high-fat diet (HFD) animal model of NASH. METHODS C57BL/6 mice on an HFD were orally administered CardioAid or lunasin for 25 weeks. The effects on the immune system, liver function, insulin resistance and lipid profile were studied. RESULTS Treatment with CardioAid and lunasin was associated with a significant decrease in the CD4/CD8 ratio and an increase in CD4+CD25+ lymphocytes. A decrease in interleukin 1-alpha serum levels and an increase in transforming growth factor beta serum levels were noted. These were associated with alleviation of liver damage as indicated by a significant decrease in liver enzymes and improvement in the histological nonalcoholic fatty liver disease activity score (NAS). Decreases in both serum triglyceride and serum glucose levels were observed in treated mice. A decrease in total body fat measured by EchoMRI was also observed in treated mice. CONCLUSIONS CardioAid and lunasin exerted hepatoprotective and glucose-protective effects in an HFD NASH model. These data and the high-safety profiles of CardioAid and Lunasin support their use in patients in the early stages of NASH to prevent deterioration due to the disease.
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Affiliation(s)
- Ariel Drori
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
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16
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Adar T, Ilan Y, Elstein D, Zimran A. Liver involvement in Gaucher disease – Review and clinical approach. Blood Cells Mol Dis 2018; 68:66-73. [DOI: 10.1016/j.bcmd.2016.10.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 10/17/2016] [Indexed: 02/07/2023]
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17
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Khoury T, Rotnemer-Golinkin D, Shabat Y, Zolotarovya L, Ilan Y. Oral Co-administration of Soy-derived Extracts with Alcohol or with Sugar-sweetened Beverages Exerts Liver and Sugar Protective Effects. J Clin Transl Hepatol 2017; 5:208-215. [PMID: 28936402 PMCID: PMC5606967 DOI: 10.14218/jcth.2017.00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/14/2017] [Accepted: 04/21/2017] [Indexed: 12/04/2022] Open
Abstract
Background and Aims: Both alcoholic drinks and high sugar-containing soft drinks cause major health problems worldwide. Oral administration of OS and M1 soy-derived extracts has been shown to alleviate liver injury in animal models. The aim of the present study was to determine the liver- and sugar-protective effect of OS and M1 soy-derived extracts when added to alcohol and sugar-enriched drinks. Methods: Mice were treated with alcohol or high sugar-containing drinks, with and without administration of a combination of OS and M1 soy extracts. Mice were observed for the effects on liver injury, glucose metabolism, and the immune system. Results: Co-administration of the soy extracts OS and M1 significantly alleviated the liver injury induced by acute alcohol, as evidenced by decreased liver enzymes. These beneficial effects were associated with promotion of subsets of regulatory T lymphocytes and with a trend towards a pro-inflammatory to an anti-inflammatory cytokine shift. Co-administration of OS M1 soy extracts with sugar-sweetened beverages significantly alleviated the increases in serum sugar levels. Conclusions: OS and M1 extracts exert a synergistic hepato- and glucose-protective effect in models of alcohol-induced liver damage and soft drinks-associated increases in serum glucose. These extracts may provide a solution to the two pressing health problems.
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Affiliation(s)
- Tawfik Khoury
- *Correspondence to: Tawfik Khoury, Gastroenterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, PO Box 1200, Jerusalem IL 91120, Israel. Tel: +972-509870611, E-mails: ,
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18
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Deguchi H, Navarro S, Payne AB, Elias DJ, Dowling NF, Austin HD, España F, Medina P, Hooper WC, Griffin JH. Low level of the plasma sphingolipid, glucosylceramide, is associated with thrombotic diseases. Res Pract Thromb Haemost 2017; 1:33-40. [PMID: 29202121 PMCID: PMC5703432 DOI: 10.1002/rth2.12018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Essentials Minor abundance plasma lipids, eg, glucosylceramide, can modulate blood coagulation reactions This lipid was measured in plasmas of 1 myocardial infarction and 2 venous thrombosis populations Low plasma glucosylceramide levels were found in each population compared to matched controls Low plasma glucosylceramide levels are associated with venous and arterial thrombosis
Background One previous pilot study suggested the association of low plasma glucosylceramide (GlcCer) levels with venous thrombosis (VTE) risk. Objective We aimed to confirm and evaluate the association of low plasma GlcCer levels with VTE and myocardial infarction (MI) occurrence, respectively. Patients and Methods We evaluated the association of GlcCer in two independent case‐control studies of Caucasian VTE populations (N=210 and 636) and one case‐control study of Caucasian MI patients (N=345). Result Plasma GlcCer levels in VTE patients were lower compared to controls in two independent VTE populations (5.0 vs 5.8 μg/mL, P=.003 for the Scripps registry, and 5.6 vs 6.0 μg/mL, P=.001 for the Valencia registry, respectively). A low plasma GlcCer level (below tenth percentile of controls) was associated with increased VTE occurrence (odds ratio [OR]=3.7 [95% CI, 1.8‐7.9] for Scripps registry and OR=2.1 [95% CI, 1.3‐3.3] for Valencia registry, respectively). For the MI study, the median GlcCer plasma level was lower in MI patients than in controls (4.3 vs 5.6 μg/mL, P<.001), and a low level of GlcCer (below tenth percentile of control) was associated with higher MI occurrence (OR=7.7, [95% CI, 4.3‐13.8]). Conclusion Lower concentration of GlcCer was associated with VTE occurrence in 2 independent studies and also with MI occurrence in 1 study.
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Affiliation(s)
- Hiroshi Deguchi
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Silvia Navarro
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA.,Haemostasis, Thrombosis, Atherosclerosis and Vascular Biology Research Group, La Fe Medical Research Institute, Valencia, Spain
| | - Amanda B Payne
- Rollins School of Public Health, Emory University, Atlanta, GA, USA.,Division of Blood Disorders, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Darlene J Elias
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA.,Scripps Clinic and Scripps Green Hospital, La Jolla, CA, USA
| | - Nicole F Dowling
- Rollins School of Public Health, Emory University, Atlanta, GA, USA.,Division of Blood Disorders, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Harland D Austin
- Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Francisco España
- Haemostasis, Thrombosis, Atherosclerosis and Vascular Biology Research Group, La Fe Medical Research Institute, Valencia, Spain
| | - Pilar Medina
- Haemostasis, Thrombosis, Atherosclerosis and Vascular Biology Research Group, La Fe Medical Research Institute, Valencia, Spain
| | - W Craig Hooper
- Division of Blood Disorders, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - John H Griffin
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
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19
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Deguchi H, Elias DJ, Griffin JH. Minor Plasma Lipids Modulate Clotting Factor Activities and May Affect Thrombosis Risk. Res Pract Thromb Haemost 2017; 1:93-102. [PMID: 29082360 PMCID: PMC5658053 DOI: 10.1002/rth2.12017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Essentials Circulating blood contains hundreds of lipids, many of which might influence blood coagulation. Recent discoveries about circulating lipids that can affect blood coagulation are reviewed. Minor abundance plasma lipids can modulate thrombin generation via direct effects on factor Xa. Variations in minor abundance plasma lipids can influence thrombin generation and thrombosis risk.
Abstract Different minor abundance plasma lipids significantly influence thrombin generation in vitro and significant differences in such lipids are linked to risk for venous thrombosis. Some plasma sphingolipids including glucosylceramide, lyso‐sulfatide and sphingosine have anticoagulant properties whereas, conversely, some plasma phospholipid derivatives, including certain lyso‐phospholipids and ethanolamides, have procoagulant properties. Plasma metabolite profiling of venous thrombosis patients showed association of venous thrombosis with decreased plasma long‐chain acylcarntines, leading to discovery of their anticoagulant activity as inhibitors of factor Xa. Inhibition of factor Xa by acylcarnitines does not require the protein's Gla‐domain, emphasizing an expanded framework for the paradigm for lipid‐clotting factor interactions. Overall, whether by genetics or environment, alterations in the dynamics of lipid metabolism linked to an altered lipidome may contribute to regulation of blood coagulation because imbalances between physiologic procoagulant and anticoagulant lipids may contribute to excessive thrombin generation that augments risk for thrombosis.
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Affiliation(s)
- Hiroshi Deguchi
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Darlene J Elias
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA.,Scripps Clinic and Scripps Green Hospital, La Jolla, CA, USA
| | - John H Griffin
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, USA
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20
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Lalazar G, Zigmond E, Weksler-Zangen S, Ya'acov AB, Levy MS, Hemed N, Raz I, Ilan Y. Oral Administration of β-Glucosylceramide for the Treatment of Insulin Resistance and Nonalcoholic Steatohepatitis: Results of a Double-Blind, Placebo-Controlled Trial. J Med Food 2017; 20:458-464. [DOI: 10.1089/jmf.2016.3753] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Gadi Lalazar
- Gasroeterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Ehud Zigmond
- Gasroeterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Sarah Weksler-Zangen
- Diabetes Unit, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Ami Ben Ya'acov
- Gasroeterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Miriam Sklair Levy
- Department of Radiology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Nilla Hemed
- Gasroeterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Itamar Raz
- Diabetes Unit, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Yaron Ilan
- Gasroeterology and Liver Units, Department of Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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21
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Shabat Y, Ilan Y. A synergistic effect of Cremophor and beta glucosylceramide to exert liver and sugar protection. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2017; 54:1184-1191. [PMID: 28416868 DOI: 10.1007/s13197-017-2520-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/15/2016] [Accepted: 01/31/2017] [Indexed: 12/29/2022]
Abstract
Many commonly used drugs carry the potential to induce hepatotoxicity, and a large number of foods and beverages induce an increase in blood sugar levels. A change in lifestyle by omitting these compounds is not applicable in many circumstances. β-Glucosylceramide (GC) is a naturally occurring glycosphingolipid that exerts an effect on the immune system. Cremophor EL (CrEL) is a synthetic, nonionic surfactant that is used as a vehicle for the administration of water-insoluble compounds. The aim of the present study was to determine the synergistic effect of oral administration of the combination of GC and CrEL (GCC) when added to potential toxic substrates or to sugar-enriched compounds. Four groups of mice, treated with PBS, GC, CrEL, or GCC were studied in the concanavalin A immune-mediated hepatitis model, in the acetaminophen (APAP) toxicity model, and as additives to two types of sugar-enriched soda drinks. Both GC and CrEL exerted hepatoprotective effects in the ConA hepatitis and APAP toxicity models. Moreover, in both models, GCC exerted a synergistic effect in ameliorating liver damage as manifested by a significant decrease in the ALT serum levels. When added to two types of sugar-enriched sodas, GCC exerted a synergistic effect in ameliorating the increase in blood sugar levels. GCC exerts synergistic hepatoprotective and glucose-protective effects in models of liver damage and increased serum glucose. GCC can provide liver and sugar protection when co-administered with hepatotoxic drugs or sugar-enriched drinks.
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Affiliation(s)
- Yehudit Shabat
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, POB 1200, 91120 Ein-Kerem, Jerusalem, Israel
| | - Yaron Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hadassah-Hebrew University Medical Center, POB 1200, 91120 Ein-Kerem, Jerusalem, Israel
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22
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Che H, Du L, Cong P, Tao S, Ding N, Wu F, Xue C, Xu J, Wang Y. Cerebrosides from Sea Cucumber Protect Against Oxidative Stress in SAMP8 Mice and PC12 Cells. J Med Food 2017; 20:392-402. [DOI: 10.1089/jmf.2016.3789] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Hongxia Che
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Lei Du
- Division of Marine Life Science, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
| | - Peixu Cong
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Suyuan Tao
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Ning Ding
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Fengjuan Wu
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Yuming Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
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23
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Engstler AJ, Sellmann C, Jin CJ, Brandt A, Herz K, Priebs J, Bergheim I. Treatment with alpha-galactosylceramide protects mice from early onset of nonalcoholic steatohepatitis: Role of intestinal barrier function. Mol Nutr Food Res 2017; 61. [PMID: 28067024 DOI: 10.1002/mnfr.201600985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 12/21/2016] [Accepted: 12/23/2016] [Indexed: 12/22/2022]
Abstract
SCOPE The role of invariant natural killer T cells in the development of nonalcoholic steatohepatitis (NASH) has not yet been fully understood. Here, the effect of the invariant natural killer T-cell activator alpha-galactosylceramide (αGalCer) on the development of nonalcoholic fatty liver disease and intestinal barrier function was assessed in a mouse model of early Western-style diet (WSD) induced NASH. METHODS AND RESULTS Female C57BL/6J mice were either fed a liquid control diet or a liquid fructose-enriched WSD for 6 wk while being treated three times weekly with αGalCer (2 μg intraperitoneal) or vehicle. Indices of liver damage, glucose metabolism, and intestinal permeability were measured. Treatment with αGalCer markedly suppressed hepatic fat accumulation and inflammation while not affecting fasting glucose. The protective effects of αGalCer were associated with a protection against the increased translocation of bacterial endotoxins and the decreased protein levels of tight junction proteins occludin and zonula occludens 1 found in vehicle-treated mice while being fed a WSD. CONCLUSION Taken together, our data suggest that the protective effects of αGalCer against the development of a diet-induced NASH in mice are associated with a protection against the increased translocation of intestinal bacterial endotoxins associated with the development of NASH.
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Affiliation(s)
- Anna Janina Engstler
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany
| | - Cathrin Sellmann
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany
| | - Cheng Jun Jin
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany
| | - Annette Brandt
- Department of Nutritional Sciences, Molecular Nutritional Science, University of Vienna, Vienna, Austria
| | - Kathleen Herz
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany
| | - Josephine Priebs
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany
| | - Ina Bergheim
- Institute of Nutrition, SD Model Systems of Molecular Nutrition, Friedrich-Schiller University of Jena, Jena, Germany.,Department of Nutritional Sciences, Molecular Nutritional Science, University of Vienna, Vienna, Austria
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24
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Ilan Y. Review article: novel methods for the treatment of non-alcoholic steatohepatitis - targeting the gut immune system to decrease the systemic inflammatory response without immune suppression. Aliment Pharmacol Ther 2016; 44:1168-1182. [PMID: 27778363 PMCID: PMC5216447 DOI: 10.1111/apt.13833] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 07/28/2016] [Accepted: 09/28/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND The systemic immune system plays a role in inflammation and fibrogenesis associated with non-alcoholic steatohepatitis (NASH) and has become a potential target for drug development. In particular, the gut immune system has been suggested as a means for generating signals that can target the systemic immune system. AIM To describe seven novel methods being developed for the treatment of NASH that target the gut immune system for alleviation of the systemic inflammatory response, including oral administration of fatty-liver-derived proteins, anti-CD3 antibodies, tumour necrosis factor fusion protein, anti-lipopolysaccharide antibodies, glucosylceramide, delayed-release mercaptopurine, and soy-derived extracts. METHODS A search for these methods for oral immunotherapy for NASH was conducted. RESULTS Oral administration of these compounds provides an opportunity for immune modulation without immune suppression, with the advantage of being independent of a single molecular/inflammatory pathway. These modes of oral immune therapy demonstrate superior safety profiles, such that the patient is not exposed to general immune suppression. Moreover, these approaches target the whole spectrum of the disease and may serve as adjuvants to other therapies, such that they provide a platform for treatment of concomitant disorders in patients with NASH, including diabetes and hyperlipidaemia. Most of the compounds reviewed are currently in phase II trials, and it is anticipated that the acquisition of more clinical data in the next few years will enable the use of this new class of drugs for the treatment of NASH. CONCLUSION Oral immunotherapy may provide a novel platform for the treatment of NASH.
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Affiliation(s)
- Y. Ilan
- Gastroenterology and Liver UnitsDepartment of MedicineHadassah Hebrew University Medical CenterJerusalemIsrael
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25
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Ishay Y, Zimran A, Szer J, Dinur T, Ilan Y, Arkadir D. Combined beta-glucosylceramide and ambroxol hydrochloride in patients with Gaucher related Parkinson disease: From clinical observations to drug development. Blood Cells Mol Dis 2016; 68:117-120. [PMID: 27866808 DOI: 10.1016/j.bcmd.2016.10.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 10/17/2016] [Indexed: 12/17/2022]
Abstract
Both patients with non-neuronopathic Gaucher disease (GD) and heterozygous GBA mutation carrier are at increased risk for Parkinson disease (PD). The risk for PD in these groups does not linearly increase with glucosylceramide (GC) accumulation or with acid β-glucocerebrosidase (GCase) activity. This observation, together with other clinical systemic observations raises the possibility that extra-cellular GC actually has beneficial, anti-inflammatory, properties. Based on this hypothesis, we suggest here that the administration of supplementary oral GC to GBA carriers at risk for PD may slow inflammatory-driven secondary neuronal death. Such a treatment may act synergistically in GBA carriers once given in combination with an agent that prevent the primary pathologic process that leads to cell death. Ambroxol hydrochloride, a pharmacological chaperone, which reduces endoplasmic reticulum (ER) stress induced by accumulation of mutant misfolded GCase could serve as such an agent. The efficacy of this combined therapy, derived from clinical observations, in vivo and in vitro studies, should be evaluated in clinical trials.
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Affiliation(s)
- Yuval Ishay
- Department of Medicine, Hadassah Medical Center and the Hebrew University, Jerusalem, Israel
| | - Ari Zimran
- Gaucher Clinic, Shaare Zedek Medical Center and the Hebrew University, Jerusalem, Israel
| | - Jeffrey Szer
- Department of Clinical Hematology, The Royal Melbourne Hospital, Melbourne, Australia
| | - Tama Dinur
- Gaucher Clinic, Shaare Zedek Medical Center and the Hebrew University, Jerusalem, Israel
| | - Yaron Ilan
- Department of Medicine, Hadassah Medical Center and the Hebrew University, Jerusalem, Israel
| | - David Arkadir
- Department of Neurology, Hadassah Medical Center and the Hebrew University, Jerusalem, Israel.
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26
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Ilan Y. Compounds of the sphingomyelin-ceramide-glycosphingolipid pathways as secondary messenger molecules: new targets for novel therapies for fatty liver disease and insulin resistance. Am J Physiol Gastrointest Liver Physiol 2016; 310:G1102-17. [PMID: 27173510 DOI: 10.1152/ajpgi.00095.2016] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/04/2016] [Indexed: 01/31/2023]
Abstract
The compounds of sphingomyelin-ceramide-glycosphingolipid pathways have been studied as potential secondary messenger molecules in various systems, along with liver function and insulin resistance. Secondary messenger molecules act directly or indirectly to affect cell organelles and intercellular interactions. Their potential role in the pathogenesis of steatohepatitis and diabetes has been suggested. Data samples collected from patients with Gaucher's disease, who had high levels of glucocerebroside, support a role for compounds from these pathways as a messenger molecules in the pathogenesis of fatty liver disease and diabetes. The present review summarizes some of the recent data on the role of glycosphingolipid molecules as messenger molecules in various physiological and pathological conditions, more specifically including insulin resistance and fatty liver disease.
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Affiliation(s)
- Yaron Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
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27
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Oral immune therapy: targeting the systemic immune system via the gut immune system for the treatment of inflammatory bowel disease. Clin Transl Immunology 2016; 5:e60. [PMID: 26900473 PMCID: PMC4735066 DOI: 10.1038/cti.2015.47] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 11/04/2015] [Accepted: 12/22/2015] [Indexed: 12/13/2022] Open
Abstract
Inflammatory bowel diseases (IBD) are associated with an altered systemic immune response leading to inflammation-mediated damage to the gut and other organs. Oral immune therapy is a method of systemic immune modulation via alteration of the gut immune system. It uses the inherit ability of the innate system of the gut to redirect the systemic innate and adaptive immune responses. Oral immune therapy is an attractive clinical approach to treat autoimmune and inflammatory disorders. It can induce immune modulation without immune suppression, has minimal toxicity and is easily administered. Targeting the systemic immune system via the gut immune system can serve as an attractive novel therapeutic method for IBD. This review summarizes the current data and discusses several examples of oral immune therapeutic methods for using the gut immune system to generate signals to reset systemic immunity as a treatment for IBD.
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28
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Khoury T, Ben Ya'acov A, Shabat Y, Zolotarovya L, Snir R, Ilan Y. Altered distribution of regulatory lymphocytes by oral administration of soy-extracts exerts a hepatoprotective effect alleviating immune mediated liver injury, non-alcoholic steatohepatitis and insulin resistance. World J Gastroenterol 2015; 21:7443-56. [PMID: 26139990 PMCID: PMC4481439 DOI: 10.3748/wjg.v21.i24.7443] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 02/08/2015] [Accepted: 03/30/2015] [Indexed: 02/06/2023] Open
Abstract
AIM To determine the immune-modulatory and the hepatoprotective effects of oral administration of two soy extracts in immune mediated liver injury and non-alcoholic steatohepatitis (NASH). METHODS Two soy extracts, M1 and OS, were orally administered to mice with concanavalin A (ConA) immune-mediated hepatitis, to high-fat diet (HFD) mice and to methionine and choline reduced diet combined with HFD mice. Animals were followed for disease and immune biomarkers. RESULTS Oral administration of OS and M1 had an additive effect in alleviating ConA hepatitis manifested by a decrease in alanine aminotransferase and aspartate aminotransferase serum levels. Oral administration of the OS and M1 soy derived fractions, ameliorated liver injury in the high fat diet model of NASH, manifested by a decrease in hepatic triglyceride levels, improvement in liver histology, decreased serum cholesterol and triglycerides and improved insulin resistance. In the methionine and choline reduced diet combined with the high fat diet model, we noted a decrease in hepatic triglycerides and improvement in blood glucose levels and liver histology. The effects were associated with reduced serum tumor necrosis factor alpha and alteration of regulatory T cell distribution. CONCLUSION Oral administration of the combination of OS and M1 soy derived extracts exerted an adjuvant effect in the gut-immune system, altering the distribution of regulatory T cells, and alleviating immune mediated liver injury, hyperlipidemia and insulin resistance.
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Reversed-Phase Liquid Chromatography–Quadrupole-Time-of-Flight Mass Spectrometry for High-Throughput Molecular Profiling of Sea Cucumber Cerebrosides. Lipids 2015; 50:667-79. [DOI: 10.1007/s11745-015-4039-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 05/18/2015] [Indexed: 10/23/2022]
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Jia Z, Li S, Cong P, Wang Y, Sugawara T, Xue C, Xu J. High Throughput Analysis of Cerebrosides from the Sea Cucumber Pearsonothria graeffei by Liquid Chromatography—Quadrupole-Time-of-Flight Mass Spectrometry. J Oleo Sci 2015; 64:51-60. [DOI: 10.5650/jos.ess14136] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Zicai Jia
- College of Food Science and Engineering, Ocean University of China
| | - Shiyan Li
- Aquatic Products Quality Testing Center of Zhejiang Province
| | - Peixu Cong
- College of Food Science and Engineering, Ocean University of China
| | - Yuming Wang
- College of Food Science and Engineering, Ocean University of China
| | - Tatsuya Sugawara
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China
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Zigmond E, Tayer-Shifman O, Lalazar G, Ben Ya'acov A, Weksler-Zangen S, Shasha D, Sklair-Levy M, Zolotarov L, Shalev Z, Kalman R, Ziv E, Raz I, Ilan Y. β-glycosphingolipids ameliorated non-alcoholic steatohepatitis in the Psammomys obesus model. J Inflamm Res 2014; 7:151-8. [PMID: 25336983 PMCID: PMC4200037 DOI: 10.2147/jir.s50508] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Liver steatosis is a common characteristic of obesity and type 2 diabetes, and fatty liver disease is increasingly recognized as a major health burden. Accumulating evidence suggests that β-glycosphingolipids play an important role in insulin sensitivity and thus could affect hepatic steatosis. To determine the effect associated with β-glycosphingolipid-mediated amelioration of liver injury, seven groups of Psammomys obesus on a high-energy diet were studied. Animals were treated with daily injections of β-glucosylceramide, β-lactosylceramide, or a combination of both. β-glycosphingolipids ameliorated the hepatic injury manifested by decreased liver enzymes, liver weight, and hepatic fat, and improved liver histology. Administration of both β-glucosylceramide and β-lactosylceramide also decreased interferon (IFN)-γ serum levels. These effects were associated with improved serum cholesterol and triglyceride levels. These data suggest that β-glycosphingolipids ameliorate liver injury in an animal model of nonalcoholic steatohepatitis.
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Affiliation(s)
- Ehud Zigmond
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | | | - Gadi Lalazar
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Ami Ben Ya'acov
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | | | - David Shasha
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Miriam Sklair-Levy
- Department of Radiology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Lidya Zolotarov
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Zvi Shalev
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Rony Kalman
- Diabetes Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Ehud Ziv
- Diabetes Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Itamar Raz
- Diabetes Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Yaron Ilan
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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32
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Lynch L. Adipose invariant natural killer T cells. Immunology 2014; 142:337-46. [PMID: 24673647 DOI: 10.1111/imm.12269] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 02/13/2014] [Indexed: 01/11/2023] Open
Abstract
Adipose tissue is a dynamic organ that makes up a substantial proportion of the body; in severe obesity it can account for 50% of body mass. Details of the unique immune system resident in human and murine adipose tissue are only recently emerging, and so it has remained a largely unexplored and unappreciated immune site until now. Adipose tissue harbours a unique collection of immune cells, which often display unusual functions compared with their counterparts elsewhere in the body. These resident immune cells are key to maintaining tissue and immune homeostasis, yet in obesity their chronic aberrant stimulation can contribute to the inflammation and pathogenesis associated with obesity. Anti-inflammatory adipose-resident lymphocytes are often depleted in obesity, whereas pro-inflammatory immune cells accumulate, leading to an overall inflammatory state, which is a key step in the development of obesity-induced metabolic disease. A good example is invariant natural killer T (iNKT) cells, which make up a large proportion of lymphocytes in human and murine adipose tissue. Here, they are unusually poised to produce anti-inflammatory or regulatory cytokines, however in obesity, iNKT cells are greatly reduced. As iNKT cells are potent transactivaors of other immune cells, and can act as a bridge between innate and adaptive immunity, their loss in obesity represents the loss of a major regulatory population. Restoring iNKT cells, or activating them in obese mice leads to improved glucose handling, insulin sensitivity, and even weight loss, and hence represents an exciting therapeutic avenue to be explored for restoring homeostasis in obese adipose tissue.
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Affiliation(s)
- Lydia Lynch
- Department of Medicine, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
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Elliott RM, de Roos B, Duthie SJ, Bouwman FG, Rubio-Aliaga I, Crosley LK, Mayer C, Polley AC, Heim C, Coort SL, Evelo CT, Mulholland F, Daniel H, Mariman EC, Johnson IT. Transcriptome analysis of peripheral blood mononuclear cells in human subjects following a 36 h fast provides evidence of effects on genes regulating inflammation, apoptosis and energy metabolism. GENES AND NUTRITION 2014; 9:432. [PMID: 25260660 DOI: 10.1007/s12263-014-0432-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 09/20/2014] [Indexed: 12/29/2022]
Abstract
There is growing interest in the potential health benefits of diets that involve regular periods of fasting. While animal studies have provided compelling evidence that feeding patterns such as alternate-day fasting can increase longevity and reduce incidence of many chronic diseases, the evidence from human studies is much more limited and equivocal. Additionally, although several candidate processes have been proposed to contribute to the health benefits observed in animals, the precise molecular mechanisms responsible remain to be elucidated. The study described here examined the effects of an extended fast on gene transcript profiles in peripheral blood mononuclear cells from ten apparently healthy subjects, comparing transcript profiles after an overnight fast, sampled on four occasions at weekly intervals, with those observed on a single occasion after a further 24 h of fasting. Analysis of the overnight fasted data revealed marked inter-individual differences, some of which were associated with parameters such as gender and subject body mass. For example, a striking positive association between body mass index and the expression of genes regulated by type 1 interferon was observed. Relatively subtle changes were observed following the extended fast. Nonetheless, the pattern of changes was consistent with stimulation of fatty acid oxidation, alterations in cell cycling and apoptosis and decreased expression of key pro-inflammatory genes. Stimulation of fatty acid oxidation is an expected response, most likely in all tissues, to fasting. The other processes highlighted provide indications of potential mechanisms that could contribute to the putative beneficial effects of intermittent fasting in humans.
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Affiliation(s)
- R M Elliott
- Institute of Food Research, Colney Lane, Norwich, UK,
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Martin-Murphy BV, You Q, Wang H, De La Houssaye BA, Reilly TP, Friedman JE, Ju C. Mice lacking natural killer T cells are more susceptible to metabolic alterations following high fat diet feeding. PLoS One 2014; 9:e80949. [PMID: 24465369 PMCID: PMC3896335 DOI: 10.1371/journal.pone.0080949] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 10/14/2013] [Indexed: 12/12/2022] Open
Abstract
Current estimates suggest that over one-third of the adult population has metabolic syndrome and three-fourths of the obese population has non-alcoholic fatty liver disease (NAFLD). Inflammation in metabolic tissues has emerged as a universal feature of obesity and its co-morbidities, including NAFLD. Natural Killer T (NKT) cells are a subset of innate immune cells that abundantly reside within the liver and are readily activated by lipid antigens. There is general consensus that NKT cells are pivotal regulators of inflammation; however, disagreement exists as to whether NKT cells exert pathogenic or suppressive functions in obesity. Here we demonstrate that CD1d−/− mice, which lack NKT cells, were more susceptible to weight gain and fatty liver following high fat diet (HFD) feeding. Compared with their WT counterparts, CD1d−/− mice displayed increased adiposity and greater induction of inflammatory genes in the liver suggestive of the precursors of NAFLD. Calorimetry studies revealed a significant increase in food intake and trends toward decreased metabolic rate and activity in CD1d−/− mice compared with WT mice. Based on these findings, our results suggest that NKT cells play a regulatory role that helps to prevent diet-induced obesity and metabolic dysfunction and may play an important role in mechanisms governing cross-talk between metabolism and the immune system to regulate energy balance and liver health.
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Affiliation(s)
- Brittany V. Martin-Murphy
- Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Qiang You
- Department of Biotherapy, Second Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Hong Wang
- Division of Endocrinology, Diabetes & Metabolism, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Becky A. De La Houssaye
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Timothy P. Reilly
- Drug Safety Evaluation, Research & Development, Bristol-Myers Squibb Company, Princeton, New Jersey, United States of America
| | - Jacob E. Friedman
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Cynthia Ju
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
- * E-mail:
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Ben Ya'acov A, Lalazar G, Zolotaryova L, Steinhardt Y, Lichtentein Y, Ilan Y, Shteyer E. Impaired liver regeneration by β-glucosylceramide is associated with decreased fat accumulation. J Dig Dis 2013; 14:425-32. [PMID: 23575221 DOI: 10.1111/1751-2980.12062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To investigate the effect of β-glucosylceramide (GC), a natural glycolipid, on hepatic fat accumulation and regenerative response after partial hepatectomy (PH). METHODS Male C57Bl/6 mice were assigned to either 70% PH or sham surgery after receiving daily intraperitoneal injection of GC or vehicle for 3 days. Hepatic fat accumulation, cytokines, cell cycle proteins and adipogenic genes expression were assessed at various time points after PH. RESULTS The administration of GC delayed hepatic triglyceride accumulation during hepatic regeneration. This observation was closely correlated with alterations in the expression of four major adipogenic genes during the course of liver regeneration, with reduced expression 3 h after PH and increased expression 48 h post-surgery. GC significantly reduced hepatocellular proliferation 48 h after PH. In GC-treated mice, both tumor necrosis factor-α and interleukin-6 levels were lower 3, 48 and 72 h after PH compared with the control group. CONCLUSIONS Administration of GC delayed hepatic triglyceride accumulation and suppressed early adipogenic gene expression during the hepatic regenerative response. These changes are closely associated with early inhibition of liver regeneration and temporal alteration of cytokine secretion.
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Affiliation(s)
- Ami Ben Ya'acov
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
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Abstract
Metabolic syndrome, obesity, and nonalcoholic steatohepatitis are associated with a state of chronic inflammation. The immune system and the inflammatory cascade can be involved in the development of any of the above common conditions. This association raises the question of whether immune therapy can be used for the treatment of nonalcoholic steatohepatitis. Although immune therapy is not yet feasible for clinical use, here, we review some of the recent data on the potential role of the various arms of the immune system in the development of nonalcoholic steatohepatitis and several potential therapeutic targets.
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Shabat Y, Lichtenstein Y, Zolotarov L, Ben Ya'acov A, Ilan Y. Hepatoprotective effect of DT56a is associated with changes in natural killer T cells and regulatory T cells. J Dig Dis 2013; 14:84-92. [PMID: 23134214 DOI: 10.1111/1751-2980.12003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the metabolic and immunological effects of the oral administration of DT56a, an enzymatic isolate of soybeans. METHODS DT56a was orally administered to mice in three animal models: leptin deficiency, high-fat diet (HFD) supplementation and immune-mediated hepatitis. Liver damage and immunological status were assessed. RESULTS Oral administration of DT56a to leptin-deficient (ob/ob) and HFD mice led to a significant reduction in serum triglyceride (TG) and total cholesterol (TC) levels. DT56a-treated mice in both models exhibited a significant reduction in hepatic levels of TG and marked alleviation of glycemic control as indicated by significant decreases in fasting blood glucose levels and glucose tolerance tests. The levels of liver enzymes were reduced. These metabolic effects were associated with altered distributions of regulatory T (Tregs) and natural killer T (NKT) cells. DT56a suppressed the immune-mediated liver damage induced by concanavalin A indicated by decreased liver enzymes and serum interferon-γ levels and by improved histology and decreased hepatic apoptosis. Oral administration of DT56a also alleviated immune-mediated hepatitis and affected Tregs and NKT cells. CONCLUSIONS Oral administration of DT56a promotes a hepatoprotective effect associated with an alteration in the distribution of Tregs and NKT cells.
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Affiliation(s)
- Yehudit Shabat
- Liver Unit, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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38
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Wu L, Van Kaer L. Contribution of lipid-reactive natural killer T cells to obesity-associated inflammation and insulin resistance. Adipocyte 2013; 2:12-16. [PMID: 23700548 PMCID: PMC3661135 DOI: 10.4161/adip.22296] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Obesity is associated with a low-grade, chronic inflammation that promotes the development of a variety of diseases, most notably type 2 diabetes. A number of cell types of the innate and adaptive immune systems have been implicated in this process. Recent studies have focused on the role of natural killer T (NKT) cells, a subset of T lymphocytes that react with lipids, in the development of obesity-associated diseases. These studies have shown that invariant NKT (iNKT) cells, a population of NKT cells expressing a semi-invariant T cell receptor, become rapidly activated in response to lipid excess, and that these cells influence the capacity of other leukocytes to produce cytokines during the progression of obesity. The role of NKT cells in obesity-associated inflammation and insulin resistance has been investigated using NKT cell-deficient animals, adoptive transfer of NKT cells and an iNKT cell agonist. While divergent results have been obtained, it is now clear that NKT cells can modulate the inflammatory milieu in obesity, suggesting that these cells could be targeted for therapeutic intervention in obesity-associated diseases.
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Machado MV, Yang Y, Diehl AM. The benefits of restraint: a pivotal role for IL-13 in hepatic glucose homeostasis. J Clin Invest 2012; 123:115-7. [PMID: 23257364 DOI: 10.1172/jci67238] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
In response to feeding, insulin promotes the uptake of sugar in peripheral tissues and suppresses the production of sugar, a process called gluconeogenesis, in the liver. Recent research has shown that chronic inflammation promotes insulin resistance, and in turn, chronically high glucose levels can drive inflammation. In this issue of the JCI, Stanya et al. investigate the connection between inflammation and glucose homeostasis by analyzing the effect of the antiinflammatory cytokine IL-13. Their results suggest that IL-13 plays an unexpected role in the regulation of glucose homeostasis by modulating gluconeogenesis and may be a useful therapeutic target for treatment of diabetes and metabolic syndrome.
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Gonzalez-Carmona MA, Sandhoff R, Tacke F, Vogt A, Weber S, Canbay AE, Rogler G, Sauerbruch T, Lammert F, Yildiz Y. Beta-glucosidase 2 knockout mice with increased glucosylceramide show impaired liver regeneration. Liver Int 2012; 32:1354-62. [PMID: 22764777 DOI: 10.1111/j.1478-3231.2012.02841.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Accepted: 05/28/2012] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Glycolipids have been shown to serve specialized functions in cell signalling, proliferation and differentiation processes, which are all important during liver regeneration. We previously generated beta-glucosidase 2 (GBA2) knockout mice that accumulate the glycolipid glucosylceramide in various tissues, including the liver. The present study addressed the role of GBA2-deficiency and subsequent glucosylceramide accumulation in liver regeneration. METHODS Gba2 knockout and wild-type mice were subjected to two-third partial hepatectomy. Mice were sacrificed at different time points, blood was collected, and the remnant liver was removed. Glucosylceramide and ceramide were quantified using mass spectrometry from whole liver and isolated hepatocytes. Serum and hepatocytic supernatant of IL-6, TNF-α and TGF-β levels were measured using ELISA. Cell signalling proteins were analysed using immunoblots. RESULTS Regenerating liver after partial hepatectomy showed a significant increase of hepatic glucosylceramide in GBA2-deficient mice compared to controls. Accumulation of glucosylceramide was associated with a delay in liver regeneration and reduced serum levels of IL-6 and TNF-α. Furthermore, reduced IL-6 led to decreased expression of the phosphorylated form of the signal transducer and activator of transcription 3 (P-STAT3). CONCLUSIONS We conclude that increased glucosylceramide affects cytokine- and growth factor-mediated signalling pathways during liver regeneration. Thus, the repression of IL-6/STAT3 signalling pathway seems to be one of the mechanisms for the delay of liver regeneration in GBA2-deficient mice.
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Van Kaer L, Parekh VV, Wu L. Invariant natural killer T cells as sensors and managers of inflammation. Trends Immunol 2012; 34:50-8. [PMID: 23017731 DOI: 10.1016/j.it.2012.08.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 08/28/2012] [Accepted: 08/28/2012] [Indexed: 02/08/2023]
Abstract
Invariant natural killer T (iNKT) cells are a subset of innate-like lymphocytes that recognize glycolipid antigens bound by the major histocompatibility complex (MHC)-class-I-related protein CD1d. iNKT cells are activated early during a variety of infections and inflammatory diseases and contribute to the subsequent development of adaptive immune responses. Consequently, iNKT cells play a critical role in the development and resolution of inflammatory diseases and represent attractive targets for the development of immunotherapies. Recent studies have provided important insight into the mechanisms by which iNKT cells become activated in response to diverse inflammatory stimuli. These new findings should be instrumental to promote the immunomodulatory properties of iNKT cells for treatment of inflammatory diseases.
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Affiliation(s)
- Luc Van Kaer
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
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Satoh M, Andoh Y, Clingan CS, Ogura H, Fujii S, Eshima K, Nakayama T, Taniguchi M, Hirata N, Ishimori N, Tsutsui H, Onoé K, Iwabuchi K. Type II NKT cells stimulate diet-induced obesity by mediating adipose tissue inflammation, steatohepatitis and insulin resistance. PLoS One 2012; 7:e30568. [PMID: 22383967 PMCID: PMC3284453 DOI: 10.1371/journal.pone.0030568] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 12/19/2011] [Indexed: 11/18/2022] Open
Abstract
The progression of obesity is accompanied by a chronic inflammatory process that involves both innate and acquired immunity. Natural killer T (NKT) cells recognize lipid antigens and are also distributed in adipose tissue. To examine the involvement of NKT cells in the development of obesity, C57BL/6 mice (wild type; WT), and two NKT-cell-deficient strains, Jα18(-/-) mice that lack the type I subset and CD1d(-/-) mice that lack both the type I and II subsets, were fed a high fat diet (HFD). CD1d(-/-) mice gained the least body weight with the least weight in perigonadal and brown adipose tissue as well as in the liver, compared to WT or Jα18(-/-) mice fed an HFD. Histologically, CD1d(-/-) mice had significantly smaller adipocytes and developed significantly milder hepatosteatosis than WT or Jα18(-/-) mice. The number of NK1.1(+)TCRβ(+) cells in adipose tissue increased when WT mice were fed an HFD and were mostly invariant Vα14Jα18-negative. CD11b(+) macrophages (Mφ) were another major subset of cells in adipose tissue infiltrates, and they were divided into F4/80(high) and F4/80(low) cells. The F4/80(low)-Mφ subset in adipose tissue was increased in CD1d(-/-) mice, and this population likely played an anti-inflammatory role. Glucose intolerance and insulin resistance in CD1d(-/-) mice were not aggravated as in WT or Jα18(-/-) mice fed an HFD, likely due to a lower grade of inflammation and adiposity. Collectively, our findings provide evidence that type II NKT cells initiate inflammation in the liver and adipose tissue and exacerbate the course of obesity that leads to insulin resistance.
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Affiliation(s)
- Masashi Satoh
- Department of Immunology, Kitasato University School of Medicine, Sagamihar, Japan
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuhiro Andoh
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Christopher Stuart Clingan
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
- Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Hisako Ogura
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Fujii
- Department of Molecular and Cellular Pathobiology and Therapeutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Koji Eshima
- Department of Immunology, Kitasato University School of Medicine, Sagamihar, Japan
| | - Toshinori Nakayama
- Department of Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Masaru Taniguchi
- RIKEN Research Center for Allergy and Immunology, Yokohama, Japan
| | - Noriyuki Hirata
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
- Division of Cancer Biology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Naoki Ishimori
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Kazunori Onoé
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Kazuya Iwabuchi
- Department of Immunology, Kitasato University School of Medicine, Sagamihar, Japan
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
- * E-mail:
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Role of NKT Cells in the Pathogenesis of NAFLD. Int J Hepatol 2012; 2012:850836. [PMID: 22577564 PMCID: PMC3335183 DOI: 10.1155/2012/850836] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 01/12/2012] [Accepted: 01/23/2012] [Indexed: 12/16/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most frequent chronic liver disease and shows various inflammatory changes in the liver. Among those inflammatory cells, natural killer T (NKT) cells are found to have a critical role during the disease progression. NKT cells may have a protective role at the early stage with simple steatosis through modification of insulin resistance, whereas they act as a progression factor at the advanced stage with fibrosis. Those processes are thought to depend on interaction between NKT cells and CD1d molecule in the liver.
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44
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Cipolletta D, Kolodin D, Benoist C, Mathis D. Tissular T(regs): a unique population of adipose-tissue-resident Foxp3+CD4+ T cells that impacts organismal metabolism. Semin Immunol 2011; 23:431-7. [PMID: 21724410 DOI: 10.1016/j.smim.2011.06.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 06/07/2011] [Indexed: 10/18/2022]
Abstract
Foxp3+CD4+ regulatory T (T(reg)) cells are a key population in controlling the immune response. Recently, their roles have been expanded to broader, non-immune, contexts, in particular the metabolic consequences downstream of obesity-induced inflammation, e.g. type-2 diabetes and cardiovascular disease. This review highlights the major innate and adaptive immune cell subsets contributing to adipose-tissue inflammation, the key role played by fat-resident T(regs), and the potential of T(reg)-based therapies for treatment of the metabolic syndrome.
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Affiliation(s)
- Daniela Cipolletta
- Department of Pathology, Harvard Medical School, Boston, MA 02115, United States
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Mantell BS, Stefanovic-Racic M, Yang X, Dedousis N, Sipula IJ, O'Doherty RM. Mice lacking NKT cells but with a complete complement of CD8+ T-cells are not protected against the metabolic abnormalities of diet-induced obesity. PLoS One 2011; 6:e19831. [PMID: 21674035 PMCID: PMC3108591 DOI: 10.1371/journal.pone.0019831] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Accepted: 04/18/2011] [Indexed: 12/12/2022] Open
Abstract
The contribution of natural killer T (NKT) cells to the pathogenesis of metabolic abnormalities of obesity is controversial. While the combined genetic deletion of NKT and CD8(+) T-cells improves glucose tolerance and reduces inflammation, interpretation of these data have been complicated by the recent observation that the deletion of CD8(+) T-cells alone reduces obesity-induced inflammation and metabolic dysregulation, leaving the issue of the metabolic effects of NKT cell depletion unresolved. To address this question, CD1d null mice (CD1d(-/-)), which lack NKT cells but have a full complement of CD8(+) T-cells, and littermate wild type controls (WT) on a pure C57BL/6J background were exposed to a high fat diet, and glucose intolerance, insulin resistance, dyslipidemia, inflammation, and obesity were assessed. Food intake (15.5±4.3 vs 15.3±1.8 kcal/mouse/day), weight gain (21.8±1.8 vs 22.8±1.4 g) and fat mass (18.6±1.9 vs 19.5±2.1 g) were similar in CD1d(-/-) and WT, respectively. As would be expected from these data, metabolic rate (3.0±0.1 vs 2.9±0.2 ml O(2)/g/h) and activity (21.6±4.3 vs 18.5±2.6 beam breaks/min) were unchanged by NKT cell depletion. Furthermore, the degree of insulin resistance, glucose intolerance, liver steatosis, and adipose and liver inflammatory marker expression (TNFα, IL-6, IL-10, IFN-γ, MCP-1, MIP1α) induced by high fat feeding in CD1d(-/-) were not different from WT. We conclude that deletion of NKT cells, in the absence of alterations in the CD8(+) T-cell population, is insufficient to protect against the development of the metabolic abnormalities of diet-induced obesity.
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Affiliation(s)
- Benjamin S. Mantell
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Maja Stefanovic-Racic
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Xiao Yang
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Nikolas Dedousis
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Ian J. Sipula
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Robert M. O'Doherty
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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Adler M, Taylor S, Okebugwu K, Yee H, Fielding C, Fielding G, Poles M. Intrahepatic natural killer T cell populations are increased in human hepatic steatosis. World J Gastroenterol 2011; 17:1725-31. [PMID: 21483633 PMCID: PMC3072637 DOI: 10.3748/wjg.v17.i13.1725] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 08/06/2010] [Accepted: 08/13/2010] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine if natural killer T cell (NKT) populations are affected in nonalcoholic fatty liver disease (NAFLD).
METHODS: Patients undergoing bariatric surgery underwent liver biopsy and blood sampling during surgery. The biopsy was assessed for steatosis and immunocyte infiltration. Intrahepatic lymphocytes (IHLs) were isolated from the remainder of the liver biopsy, and peripheral blood mononuclear cells (PBMCs) were isolated from the blood. Expression of surface proteins on both IHLs and PBMCs were quantified using flow cytometry.
RESULTS: Twenty-seven subjects participated in this study. Subjects with moderate or severe steatosis had a higher percentage of intrahepatic CD3+/CD56+ NKT cells (38.6%) than did patients with mild steatosis (24.1%, P = 0.05) or those without steatosis (21.5%, P = 0.03). Patients with moderate to severe steatosis also had a higher percentage of NKT cells in the blood (12.3%) as compared to patients with mild steatosis (2.5% P = 0.02) and those without steatosis (5.1%, P = 0.05).
CONCLUSION: NKT cells are significantly increased in the liver and blood of patients with moderate to severe steatosis and support the role of NKT cells in NAFLD.
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Kurundkar SB, Sachan N, Kodam KM, Kulkarni VM, Bodhankar SL, Ghole VS. Effect of a novel biphenyl compound, VMNS2e on ob/ob mice. Eur J Pharmacol 2011; 650:472-8. [PMID: 20950599 DOI: 10.1016/j.ejphar.2010.09.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 09/17/2010] [Accepted: 09/23/2010] [Indexed: 12/25/2022]
Abstract
VMNS2e is a novel biphenyl compound, which in previous studies had showed most favourable interactions with the active site of protein tyrosine phosphatase 1B (PTP1B). The effect of acute and chronic treatment of VMNS2e (30mg/kg) was investigated in ob/ob mice. Plasma glucose was measured after acute administration of VMNS2e (30mg/kg) in both lean and ob/ob mice. In the chronic study, VMNS2e (30mg/kg) was given orally, once daily for 60days. Metformin (300mg/kg) was taken as standard therapy. Body weight, food intake and blood glucose was measured weekly while glycosylated hemoglobin A(1c) (HbA(1c)), insulin, triglyceride, total cholesterol, low density lipoprotein (LDL), fructosamine, non esterified fatty acid and organ weight were estimated after the completion of treatment period. Oral glucose tolerance test was performed on the last day of treatment. Liver and epididymal fat weights were taken. Acute dose of VMNS2e elicited an anti hyperglycemic effect. It reduced blood glucose by 14% (0.5h) and 35.6% (6h). Chronic VMNS2e treatment improved glucose tolerance by 25.3%. It decreased blood glucose levels. Hyperinsulinemia was reduced (19.6%). VMNS2e treatment had no significant effect on body weight and food consumption. VMNS2e treatment exhibited significant reduction (28.2%) in HbA(1c), plasma triglyceride (49%), LDL (24%) and fructosamine (13%) levels. VMNS2e treatment did not alter total cholesterol and non esterified fatty acid levels. Epididymal fat/body weight ratio was reduced (26.3%). VMNS2e exhibited both acute and chronic anti hyperglycemic effect, insulin sensitivity along with improvement in various lipid parameters and glycemic control.
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Affiliation(s)
- Sucheta B Kurundkar
- Division of Biochemistry, Department of Chemistry, University of Pune, Pune, India.
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Induction of regulatory T cells decreases adipose inflammation and alleviates insulin resistance in ob/ob mice. Proc Natl Acad Sci U S A 2010; 107:9765-70. [PMID: 20445103 DOI: 10.1073/pnas.0908771107] [Citation(s) in RCA: 261] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Leptin-deficient ob/ob mice are overweight, develop insulin resistance, and serve as a model for type 2 diabetes (T2D). Studies suggest that inflammatory pathways are linked to the development of insulin resistance and T2D both in animals and humans. We asked whether the induction of regulatory T cells (Tregs) could alleviate the pathological and metabolic abnormalities in ob/ob mice. We induced TGF-beta-dependent CD4(+) latency-associated peptide (LAP)-positive Tregs by oral administration of anti-CD3 antibody plus beta-glucosylceramide. We found a decrease in pancreatic islet cell hyperplasia, fat accumulation in the liver, and inflammation in adipose tissue, accompanied by lower blood glucose and liver enzymes. In addition, treated animals had decreased CD11b(+)F4/80(+) macrophages and TNF-alpha in adipose tissue. Adoptive transfer of orally induced CD4(+)LAP(+) Tregs ameliorated metabolic and cytokine abnormalities. Our results demonstrate the importance of inflammation in T2D and identify a unique immunological approach for treatment of T2D by the induction of Tregs.
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Abstract
Glucosylceramide has a unique and often ambiguous role in mammalian cells. Activation of glucosylceramide synthase, the enzyme that places a glucosyl moiety onto ceramide, is the first pathway-committed step to the production of more complex glycosphingolipids such as lactosylceramide and gangliosides. Alterations in the level of glucosylceramide are noted in cells and tissues in response to cardiovascular disease, diabetes, skin disorders and cancer. Overall, upregulation of glucosylceramide offers cellular protection and primes certain cells for proliferation. However, prolonged overabundance of glucosylceramide is detrimental, as seen in Gaucher disease in humans.
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Kremer M, Thomas E, Milton RJ, Perry AW, van Rooijen N, Wheeler MD, Zacks S, Fried M, Rippe RA, Hines IN. Kupffer cell and interleukin-12-dependent loss of natural killer T cells in hepatosteatosis. Hepatology 2010; 51:130-41. [PMID: 20034047 PMCID: PMC3761962 DOI: 10.1002/hep.23292] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
UNLABELLED Hepatosteatosis is associated with increased expression of tumor necrosis factor alpha (TNF-alpha) and interleukin (IL)-12, major T helper (Th) 1 cytokines, and reduced hepatic natural killer T (NKT) cell numbers. The relationship between lipid accumulation, cytokine expression, and hepatic NKT cells is not known. This study was conducted to assess the role of IL-12 in the development of hepatic steatosis and its potential impact on liver NKT cells. Male C57Bl/6 wildtype (WT) and IL-12-deficient (IL-12(-/-)) mice were fed a choline-deficient diet (CDD) for 0, 10, or 20 weeks. CDD led to marked hepatosteatosis, reduced hepatic but not splenic NKT cell numbers and function, and increased hepatic expression of the T(h)1-type cytokines IL-12, interferon gamma (IFN-gamma), and TNF-alpha in WT mice. The absence of IL-12 resulted in similar CDD-induced hepatosteatosis, but preserved hepatic NKT cells and significantly reduced hepatic IFN-gamma and TNF-alpha expression. Treatment of CDD-fed mice with lipopolysaccharide led to a significant increase in hepatic IL-12 expression, and Kupffer cell (KC) depletion reduced liver IL-12 expression and restored NKT cells in CDD-induced fatty liver. Interestingly, KCs from CDD-fed mice failed to produce increased quantities of IL-12 upon activation in vitro when compared to similarly treated KCs from control fed mice, suggesting that secondary factors in vivo promote heightened IL-12 production. Finally, human livers with severe steatosis showed a substantial decrease in NKT cells. CONCLUSION Hepatosteatosis reduces the numbers of hepatic NKT cells in a KC-and IL-12-dependent manner. Our results suggest a pivotal and multifunctional role of KC-derived IL-12 in the altered immune response in steatotic liver, a process that is likely active within human nonalcoholic fatty liver disease.
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Affiliation(s)
- Michael Kremer
- Center for Alcohol Sudies, University of North Carolina at Chapel Hill, NC 27599
,Department of Surgery, University of Heidelberg, Germany
| | - Emmanuel Thomas
- Department of Medicine, University of North Carolina at Chapel Hill, NC 27599
| | - Richard J. Milton
- Center for Alcohol Sudies, University of North Carolina at Chapel Hill, NC 27599
| | - Ashley W. Perry
- Center for Alcohol Sudies, University of North Carolina at Chapel Hill, NC 27599
| | - Nico van Rooijen
- Department of Cell Biology, Free University, Amsterdam, Netherlands
| | - Michael D. Wheeler
- Center for Alcohol Sudies, University of North Carolina at Chapel Hill, NC 27599
| | - Steven Zacks
- Department of Medicine, University of North Carolina at Chapel Hill, NC 27599
| | | | - Richard A. Rippe
- Department of Medicine, University of North Carolina at Chapel Hill, NC 27599
| | - Ian N. Hines
- Center for Alcohol Sudies, University of North Carolina at Chapel Hill, NC 27599
,Department of Medicine, University of North Carolina at Chapel Hill, NC 27599
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