1
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Habib S. Team players in the pathogenesis of metabolic dysfunctions-associated steatotic liver disease: The basis of development of pharmacotherapy. World J Gastrointest Pathophysiol 2024; 15:93606. [PMID: 39220834 PMCID: PMC11362842 DOI: 10.4291/wjgp.v15.i4.93606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/14/2024] [Accepted: 07/23/2024] [Indexed: 08/22/2024] Open
Abstract
Nutrient metabolism is regulated by several factors. Social determinants of health with or without genetics are the primary regulator of metabolism, and an unhealthy lifestyle affects all modulators and mediators, leading to the adaptation and finally to the exhaustion of cellular functions. Hepatic steatosis is defined by presence of fat in more than 5% of hepatocytes. In hepatocytes, fat is stored as triglycerides in lipid droplet. Hepatic steatosis results from a combination of multiple intracellular processes. In a healthy individual nutrient metabolism is regulated at several steps. It ranges from the selection of nutrients in a grocery store to the last step of consumption of ATP as an energy or as a building block of a cell as structural component. Several hormones, peptides, and genes have been described that participate in nutrient metabolism. Several enzymes participate in each nutrient metabolism as described above from ingestion to generation of ATP. As of now several publications have revealed very intricate regulation of nutrient metabolism, where most of the regulatory factors are tied to each other bidirectionally, making it difficult to comprehend chronological sequence of events. Insulin hormone is the primary regulator of all nutrients' metabolism both in prandial and fasting states. Insulin exerts its effects directly and indirectly on enzymes involved in the three main cellular function processes; metabolic, inflammation and repair, and cell growth and regeneration. Final regulators that control the enzymatic functions through stimulation or suppression of a cell are nuclear receptors in especially farnesoid X receptor and peroxisome proliferator-activated receptor/RXR ligands, adiponectin, leptin, and adiponutrin. Insulin hormone has direct effect on these final modulators. Whereas blood glucose level, serum lipids, incretin hormones, bile acids in conjunction with microbiota are intermediary modulators which are controlled by lifestyle. The purpose of this review is to overview the key players in the pathogenesis of metabolic dysfunction-associated steatotic liver disease (MASLD) that help us understand the disease natural course, risk stratification, role of lifestyle and pharmacotherapy in each individual patient with MASLD to achieve personalized care and target the practice of precision medicine. PubMed and Google Scholar databases were used to identify publication related to metabolism of carbohydrate and fat in states of health and disease states; MASLD, cardiovascular disease and cancer. More than 1000 publications including original research and review papers were reviewed.
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Affiliation(s)
- Shahid Habib
- Department of Hepatology, Liver Institute PLLC, Tucson, AZ 85712, United States
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2
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Pagkali A, Makris A, Brofidi K, Agouridis AP, Filippatos TD. Pathophysiological Mechanisms and Clinical Associations of Non-Alcoholic Fatty Pancreas Disease. Diabetes Metab Syndr Obes 2024; 17:283-294. [PMID: 38283640 PMCID: PMC10813232 DOI: 10.2147/dmso.s397643] [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: 08/09/2023] [Accepted: 12/29/2023] [Indexed: 01/30/2024] Open
Abstract
Non-Alcoholic Fatty Pancreas disease (NAFPD), characterized by fat accumulation in pancreatic tissue, is an emerging clinical entity. However, the clinical associations, the underlying molecular drivers, and the pathophysiological mechanisms of NAFPD have not yet been characterized in detail. The NAFPD spectrum not only includes infiltration and accumulation of fat within and between pancreatic cells but also involves several inflammatory processes, dysregulation of physiological metabolic pathways, and hormonal defects. A deeper understanding of the underlying molecular mechanisms is key to correlate NAFPD with clinical entities including non-alcoholic fatty liver disease, metabolic syndrome, diabetes mellitus, atherosclerosis, as well as pancreatic cancer and pancreatitis. The aim of this review is to examine the pathophysiological mechanisms of NAFPD and to assess the possible causative/predictive risk factors of NAFPD-related clinical syndromes.
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Affiliation(s)
- Antonia Pagkali
- School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Anastasios Makris
- School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Kalliopi Brofidi
- Department of Internal Medicine, School of Medicine, University of Crete, Heraklion, Greece
| | - Aris P Agouridis
- School of Medicine, European University Cyprus, Nicosia, Cyprus
- Department of Internal Medicine, German Oncology Center, Limassol, Cyprus
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3
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Khan S, Mahgoub S, Fallatah N, Lalor PF, Newsome PN. Liver Disease and Cell Therapy: Advances Made and Remaining Challenges. Stem Cells 2023; 41:739-761. [PMID: 37052348 PMCID: PMC10809282 DOI: 10.1093/stmcls/sxad029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 02/27/2023] [Indexed: 04/14/2023]
Abstract
The limited availability of organs for liver transplantation, the ultimate curative treatment for end stage liver disease, has resulted in a growing and unmet need for alternative therapies. Mesenchymal stromal cells (MSCs) with their broad ranging anti-inflammatory and immunomodulatory properties have therefore emerged as a promising therapeutic agent in treating inflammatory liver disease. Significant strides have been made in exploring their biological activity. Clinical application of MSC has shifted the paradigm from using their regenerative potential to one which harnesses their immunomodulatory properties. Reassuringly, MSCs have been extensively investigated for over 30 years with encouraging efficacy and safety data from translational and early phase clinical studies, but questions remain about their utility. Therefore, in this review, we examine the translational and clinical studies using MSCs in various liver diseases and their impact on dampening immune-mediated liver damage. Our key observations include progress made thus far with use of MSCs for clinical use, inconsistency in the literature to allow meaningful comparison between different studies and need for standardized protocols for MSC manufacture and administration. In addition, the emerging role of MSC-derived extracellular vesicles as an alternative to MSC has been reviewed. We have also highlighted some of the remaining clinical challenges that should be addressed before MSC can progress to be considered as therapy for patients with liver disease.
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Affiliation(s)
- Sheeba Khan
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, West Midlands, UK
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, West Midlands, UK
- Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Birmingham, Birmingham, West Midlands, UK
| | - Sara Mahgoub
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, West Midlands, UK
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, West Midlands, UK
- Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Birmingham, Birmingham, West Midlands, UK
| | - Nada Fallatah
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, West Midlands, UK
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, West Midlands, UK
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Patricia F Lalor
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, West Midlands, UK
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, West Midlands, UK
| | - Philip N Newsome
- National Institute for Health Research, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust and the University of Birmingham, Birmingham, West Midlands, UK
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, West Midlands, UK
- Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Birmingham, Birmingham, West Midlands, UK
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4
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Wong VWS, Zelber-Sagi S, Cusi K, Carrieri P, Wright E, Crespo J, Lazarus JV. Management of NAFLD in primary care settings. Liver Int 2022; 42:2377-2389. [PMID: 35986897 DOI: 10.1111/liv.15404] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/23/2022] [Accepted: 08/10/2022] [Indexed: 02/13/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) affects at least 25% of the general population and is an increasingly important cause of cirrhosis and hepatocellular carcinoma. Although it is the research focus of the hepatology field, it is clear that primary care physicians are seeing the majority of NAFLD patients and are in a pivotal position to provide quality care. In this article, we review the role of primary care in the management of NAFLD. NAFLD is common in patients with diabetes, obesity and other metabolic risk factors. Abdominal ultrasonography is the most commonly used method to diagnose fatty liver. Simple fibrosis scores have high negative predictive values in excluding advanced liver fibrosis and future liver-related events and can be used in primary care as initial evaluation. An abnormal result should be followed by subsequent workup or specialist referral. Primary care is the ideal setting to institute multidisciplinary care, especially the involvement of dietitians and physical activity trainers in lifestyle intervention, as well as initiating the discussion of bariatric surgery in patients with severe obesity. Although specific drug treatment for steatohepatitis would require a more precise diagnosis, metabolic drugs that improve both steatohepatitis and cardiovascular outcomes (e.g. glucagon-like peptide-1 receptor agonists) may be considered in patients with NAFLD.
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Affiliation(s)
- Vincent W S Wong
- Medical Data Analytics Centre, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
| | | | - Kenneth Cusi
- Division of Endocrinology, Diabetes and Metabolism, University of Florida, Gainesville, Florida, USA
| | - Patrizia Carrieri
- Aix Marseille Univ, Inserm, IRD, SESSTIM, Sciences Economiques & Sociales de la Santé & Traitement de l'Information Médicale, ISSPAM, Marseille, France
| | - Eugene Wright
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Javier Crespo
- Department of Gastroenterology and Hepatology, Marqués de Valdecilla University Hospital, Valdecilla Biomedical Research Institute (IDIVAL), Santander, University of Cantabria, Santander, Cantabria, Spain
| | - Jeffrey V Lazarus
- Barcelona Institute for Global Health (ISGlobal), Hospital Clínic, University of Barcelona, Barcelona, Spain.,Faculty of Medicine, University of Barcelona, Barcelona, Spain
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5
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Sakuma T, Nakamura M, Chiba T, Iwanaga T, Kan M, Kojima R, Ao J, Ma Y, Unozawa H, Fujita N, Kanayama K, Kanzaki H, Koroki K, Kobayashi K, Nakagawa R, Kanogawa N, Kiyono S, Kondo T, Saito T, Ogasawara S, Nakamoto S, Muroyama R, Kato J, Kishimoto T, Kato N. A diet-induced murine model for non-alcoholic fatty liver disease with obesity and insulin resistance that rapidly develops steatohepatitis and fibrosis. J Transl Med 2022; 102:1150-1157. [PMID: 35643859 DOI: 10.1038/s41374-022-00807-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 11/09/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) has become the leading cause of chronic liver disease worldwide. Patients with NAFLD often suffer steatohepatitis, which can progress to cirrhosis and hepatocellular carcinoma. The presence of visceral obesity or type 2 diabetes mellitus (T2DM) is a major risk factor and potential therapeutic target for NAFLD. The establishment of animal models with these metabolic comorbidities and with the rapid progression of the disease is needed for developing treatments for NAFLD but remains to be archived. In the present study, KK-Ay mice, widely used as T2DM models, or C57BL6 mice were fed a high-fat, high-fructose, and high-cholesterol diet supplemented with cholic acid (NAFLD diet). The KK-Ay mice fed a NAFLD diet exhibited remarkable obesity and insulin resistance. A prominent accumulation of triglycerides and cholesterol in the liver was observed at 4 weeks. These mice developed steatohepatitis at 4 weeks and fibrosis at 12 weeks. In contrast, C57BL6 mice fed a NAFLD diet remained lean, although they still developed steatohepatitis and fibrosis. In summary, we established a diet-induced murine NAFLD model with the rapid development of steatohepatitis and fibrosis, bearing obesity and insulin resistance. This model could be useful as preclinical models for drug development of NAFLD.
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Affiliation(s)
- Takafumi Sakuma
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Masato Nakamura
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan.
| | - Tetsuhiro Chiba
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Terunao Iwanaga
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Motoyasu Kan
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Ryuta Kojima
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Junjie Ao
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Yaojia Ma
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Hidemi Unozawa
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Naoto Fujita
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Kengo Kanayama
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Hiroaki Kanzaki
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Keisuke Koroki
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Kazufumi Kobayashi
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan.,Translational Research and Development Center, Chiba University Hospital, Chiba, 260-8677, Japan
| | - Ryo Nakagawa
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Naoya Kanogawa
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Soichiro Kiyono
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Takayuki Kondo
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Tomoko Saito
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Sadahisa Ogasawara
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan.,Translational Research and Development Center, Chiba University Hospital, Chiba, 260-8677, Japan
| | - Shingo Nakamoto
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Ryosuke Muroyama
- Department of Molecular Virology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Jun Kato
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Takashi Kishimoto
- Department of Molecular Pathology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
| | - Naoya Kato
- Department of Gastroenterology, Chiba University, Graduate School of Medicine, Chiba, 260-8677, Japan
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6
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Established Liposome-Coated IMB16-4 Polymeric Nanoparticles (LNPs) for Increasing Cellular Uptake and Anti-Fibrotic Effects In Vitro. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123738. [PMID: 35744862 PMCID: PMC9230879 DOI: 10.3390/molecules27123738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 11/17/2022]
Abstract
As a global health problem, liver fibrosis still does not have approved treatment. It was proved that N-(3,4,5-trichlorophenyl)-2(3-nitrobenzenesulfonamide) benzamide (IMB16-4) has anti-hepatic fibrosis activity. However, IMB16-4 displays poor water solubility and poor bioavailability. We are devoted to developing biodegraded liposome-coated polymeric nanoparticles (LNPs) as IMB16-4 delivery systems for improving aqueous solubility, cellular uptake, and anti-fibrotic effects. The physical states of IMB16-4−LNPs were analyzed using a transmission electron microscope (TEM), high-performance liquid chromatography (HPLC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimeter (DSC). The results show that IMB16-4−LNPs increased the drug loading compared to liposomes and enhanced cellular uptake behavior compared with IMB16-4−NPs. In addition, IMB16-4−LNPs could repress the expression of hepatic fibrogenesis-associated proteins, indicating that IMB16-4−LNPs exhibited evident anti-fibrotic effects.
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7
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Cadamuro M, Lasagni A, Sarcognato S, Guido M, Fabris R, Strazzabosco M, Strain AJ, Simioni P, Villa E, Fabris L. The Neglected Role of Bile Duct Epithelial Cells in NASH. Semin Liver Dis 2022; 42:34-47. [PMID: 34794182 DOI: 10.1055/s-0041-1739455] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, and affects 25% of the population in Western countries. NAFLD is the hepatic manifestation of the metabolic syndrome, linked to insulin resistance, which is the common pathogenetic mechanism. In approximately 40% of NAFLD patients, steatosis is associated with necro-inflammation and fibrosis, resulting in nonalcoholic steatohepatitis (NASH), a severe condition that may progress to cirrhosis and liver cancer. Although the hepatocyte represents the main target of the disease, involvement of the bile ducts occurs in a subset of patients with NASH, and is characterized by ductular reaction and activation of the progenitor cell compartment, which incites portal fibrosis and disease progression. We aim to dissect the multiple biological effects that adipokines and metabolic alterations exert on cholangiocytes to derive novel information on the mechanisms driven by insulin resistance, which promote fibro-inflammation and carcinogenesis in NASH.
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Affiliation(s)
| | - Alberto Lasagni
- Division of General Medicine, Padua University-Hospital, Padua, Italy
| | | | - Maria Guido
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, Treviso, Italy.,Department of Medicine (DIMED), University of Padua, Padua, Italy
| | - Roberto Fabris
- Division of Clinica Medica 3, Center for the Study and the Integrated Management of Obesity, Padua University-Hospital, Padua, Italy
| | - Mario Strazzabosco
- Department of Internal Medicine, Digestive Disease Section, Liver Center, Yale University, New Haven, Connecticut
| | - Alastair J Strain
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Paolo Simioni
- Division of General Medicine, Padua University-Hospital, Padua, Italy.,Department of Medicine (DIMED), University of Padua, Padua, Italy
| | - Erica Villa
- Gastroenterology Unit, Department of Medical Specialties, University of Modena & Reggio Emilia and Modena University-Hospital, Modena, Italy
| | - Luca Fabris
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy.,Division of General Medicine, Padua University-Hospital, Padua, Italy.,Department of Internal Medicine, Digestive Disease Section, Liver Center, Yale University, New Haven, Connecticut
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8
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Niu X, Wang X, Niu B, Wang Y, He H, Li G. New IMB16-4 Nanoparticles Improved Oral Bioavailability and Enhanced Anti-Hepatic Fibrosis on Rats. Pharmaceuticals (Basel) 2022; 15:ph15010085. [PMID: 35056142 PMCID: PMC8781400 DOI: 10.3390/ph15010085] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 12/30/2021] [Accepted: 01/04/2022] [Indexed: 02/04/2023] Open
Abstract
Liver fibrosis is challenging to treat because of the lack of effective agents worldwide. Recently, we have developed a novel compound, N-(3,4,5-trichlorophenyl)-2(3-nitrobenzenesulfonamido) benzamide referred to as IMB16-4. However, its poor aqueous solubility and poor oral bioavailability obstruct the drug discovery programs. To increase the dissolution, improve the oral bioavailability and enhance the antifibrotic activity of IMB16-4, PVPK30 was selected to establish the IMB16-4 nanoparticles. Drug release behavior, oral bioavailability, and anti-hepatic fibrosis effects of IMB16-4 nanoparticles were evaluated. The results showed that IMB16-4 nanoparticles greatly increased the dissolution rate of IMB16-4. The oral bioavailability of IMB16-4 nanoparticles was improved 26-fold compared with that of pure IMB16-4. In bile duct ligation rats, IMB16-4 nanoparticles significantly repressed hepatic fibrogenesis and improved the liver function. These findings indicate that IMB16-4 nanoparticles will provide information to expand a novel anti-hepatic fibrosis agent.
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Affiliation(s)
| | | | | | | | - Hongwei He
- Correspondence: (H.H.); (G.L.); Tel.: +86-10-67022156 (G.L.)
| | - Guiling Li
- Correspondence: (H.H.); (G.L.); Tel.: +86-10-67022156 (G.L.)
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9
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Costunolide Loaded in pH-Responsive Mesoporous Silica Nanoparticles for Increased Stability and an Enhanced Anti-Fibrotic Effect. Pharmaceuticals (Basel) 2021; 14:ph14100951. [PMID: 34681175 PMCID: PMC8539632 DOI: 10.3390/ph14100951] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 12/14/2022] Open
Abstract
Liver fibrosis remains a significant public health problem. However, few drugs have yet been validated. Costunolide (COS), as a monomeric component of the traditional Chinese medicinal herb Saussurea Lappa, has shown excellent anti-fibrotic efficacy. However, COS displays very poor aqueous solubility and poor stability in gastric juice, which greatly limits its application via an oral administration. To increase the stability, improve the dissolution rate and enhance the anti-liver fibrosis of COS, pH-responsive mesoporous silica nanoparticles (MSNs) were selected as a drug carrier. Methacrylic acid copolymer (MAC) as a pH-sensitive material was used to coat the surface of MSNs. The drug release behavior and anti-liver fibrosis effects of MSNs-COS-MAC were evaluated. The results showed that MSNs-COS-MAC prevented a release in the gastric fluid and enhanced the dissolution rate of COS in the intestinal juice. At half the dose of COS, MSNs-COS-MAC still effectively ameliorated parenchymal necrosis, bile duct proliferation and excessive collagen. MSNs-COS-MAC significantly repressed hepatic fibrogenesis by decreasing the expression of hepatic fibrogenic markers in LX-2 cells and liver tissue. These results suggest that MSNs-COS-MAC shows great promise for anti-liver fibrosis treatment.
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10
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Akinci B, Subauste A, Ajluni N, Esfandiari NH, Meral R, Neidert AH, Eraslan A, Hench R, Rus D, Mckenna B, Hussain HK, Chenevert TL, Tayeh MK, Rupani AR, Innis JW, Mantzoros CS, Conjeevaram HS, Burant CL, Oral EA. Metreleptin therapy for nonalcoholic steatohepatitis: Open-label therapy interventions in two different clinical settings. MED 2021; 2:814-835. [DOI: 10.1016/j.medj.2021.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Shimizu K, Ogiya Y, Yoshinaga K, Kimura H, Michinaga S, Ono M, Taketomi A, Terada T, Sakurai F, Mizuguchi H, Tomita K, Nishinaka T. ZFAND3 Overexpression in the Mouse Liver Improves Glucose Tolerance and Hepatic Insulin Resistance. Exp Clin Endocrinol Diabetes 2021; 130:254-261. [PMID: 33782927 DOI: 10.1055/a-1400-2656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Genome-wide association studies have identified more than 300 loci associated with type 2 diabetes mellitus; however, the mechanisms underlying their role in type 2 diabetes mellitus susceptibility remain largely unknown. Zinc finger AN1-type domain 3 (ZFAND3), known as testis-expressed sequence 27, is a type 2 diabetes mellitus-susceptibility gene. Limited information is available regarding the physiological role of ZFAND3 in vivo. This study aimed to investigate the association between ZFAND3 and type 2 diabetes mellitus. ZFAND3 was significantly upregulated in the liver of diabetic mice compared to wild-type mice. To overexpress ZFAND3, we generated a ZFAND3-expressing adenovirus (Ad) vector using an improved Ad vector exhibiting significantly lower hepatotoxicity (Ad-ZFAND3). Glucose tolerance was significantly improved in Ad-ZFAND3-treated mice compared to the control Ad-treated mice. ZFAND3 overexpression in the mouse liver also improved insulin resistance. Furthermore, gluconeogenic gene expression was significantly lower in primary mouse hepatocytes transduced with Ad-ZFAND3 than those transduced with the control Ad vector. The present results suggest that ZFAND3 improves glucose tolerance by improving insulin resistance and suppressing gluconeogenesis, serving as a potential novel therapeutic target for type 2 diabetes mellitus.
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Affiliation(s)
- Kahori Shimizu
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Yuya Ogiya
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Kaede Yoshinaga
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Hajime Kimura
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Shotaro Michinaga
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Moe Ono
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Ayako Taketomi
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Tomoyuki Terada
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Fuminori Sakurai
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Hiroyuki Mizuguchi
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan.,The Center for Advanced Medical Engineering and Informatics, Osaka University, Osaka, Japan.,Laboratory of Hepatocyte Differentiation, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Osaka, Japan
| | - Koji Tomita
- Laboratory of Molecular Biology, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
| | - Toru Nishinaka
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka, Japan
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12
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Novel IMB16-4 Compound Loaded into Silica Nanoparticles Exhibits Enhanced Oral Bioavailability and Increased Anti-Liver Fibrosis In Vitro. Molecules 2021; 26:molecules26061545. [PMID: 33799909 PMCID: PMC8000840 DOI: 10.3390/molecules26061545] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 01/06/2023] Open
Abstract
Background: Liver fibrosis, as a common and refractory disease, is challenging to treat due to the lack of effective agents worldwide. Recently, we have developed a novel compound, N-(3,4,5-trichlorophenyl)-2(3-nitrobenzenesulfonamide) benzamide (IMB16-4), which is expected to have good potential effects against liver fibrosis. However, IMB16-4 is water-insoluble and has very low bioavailability. Methods: Mesoporous silica nanoparticles (MSNs) were selected as drug carriers for the purpose of increasing the dissolution of IMB16-4, as well as improving its oral bioavailability and inhibiting liver fibrosis. The physical states of IMB16-4 and IMB16-4-MSNs were investigated using nitrogen adsorption, thermogravimetric analysis (TGA), HPLC, UV-Vis, X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Results: The results show that MSNs enhanced the dissolution rate of IMB16-4 significantly. IMB16-4-MSNs reduced cytotoxicity at high concentrations of IMB16-4 on human hepatic stellate cells LX-2 cells and improved oral bioavailability up to 530% compared with raw IMB16-4 on Sprague–Dawley (SD) rats. In addition, IMB16-4-MSNs repressed hepatic fibrogenesis by decreasing the expression of hepatic fibrogenic markers, including α-smooth muscle actin (α-SMA), transforming growth factor-beta (TGF-β1) and matrix metalloproteinase-2 (MMP2) in LX-2 cells. Conclusions: These results provided powerful information on the use of IMB16-4-MSNs for the treatment of liver fibrosis in the future.
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Kořínková L, Pražienková V, Černá L, Karnošová A, Železná B, Kuneš J, Maletínská L. Pathophysiology of NAFLD and NASH in Experimental Models: The Role of Food Intake Regulating Peptides. Front Endocrinol (Lausanne) 2020; 11:597583. [PMID: 33324348 PMCID: PMC7726422 DOI: 10.3389/fendo.2020.597583] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/28/2020] [Indexed: 12/12/2022] Open
Abstract
Obesity, diabetes, insulin resistance, sedentary lifestyle, and Western diet are the key factors underlying non-alcoholic fatty liver disease (NAFLD), one of the most common liver diseases in developed countries. In many cases, NAFLD further progresses to non-alcoholic steatohepatitis (NASH), fibrosis, cirrhosis, and to hepatocellular carcinoma. The hepatic lipotoxicity and non-liver factors, such as adipose tissue inflammation and gastrointestinal imbalances were linked to evolution of NAFLD. Nowadays, the degree of adipose tissue inflammation was shown to directly correlate with the severity of NAFLD. Consumption of higher caloric intake is increasingly emerging as a fuel of metabolic inflammation not only in obesity-related disorders but also NAFLD. However, multiple causes of NAFLD are the reason why the mechanisms of NAFLD progression to NASH are still not well understood. In this review, we explore the role of food intake regulating peptides in NAFLD and NASH mouse models. Leptin, an anorexigenic peptide, is involved in hepatic metabolism, and has an effect on NAFLD experimental models. Glucagon-like peptide-1 (GLP-1), another anorexigenic peptide, and GLP-1 receptor agonists (GLP-1R), represent potential therapeutic agents to prevent NAFLD progression to NASH. On the other hand, the deletion of ghrelin, an orexigenic peptide, prevents age-associated hepatic steatosis in mice. Because of the increasing incidence of NAFLD and NASH worldwide, the selection of appropriate animal models is important to clarify aspects of pathogenesis and progression in this field.
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Affiliation(s)
- L. Kořínková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - V. Pražienková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - L. Černá
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - A. Karnošová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - B. Železná
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
| | - J. Kuneš
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
- Institute of Physiology, Czech Academy of Sciences, Prague, Czechia
| | - Lenka Maletínská
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czechia
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Tang S, Li Y, Bao Y, Dai Z, Niu T, Wang K, He H, Song D. Novel cytisine derivatives exert anti-liver fibrosis effect via PI3K/Akt/Smad pathway. Bioorg Chem 2019; 90:103032. [DOI: 10.1016/j.bioorg.2019.103032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/20/2019] [Accepted: 06/03/2019] [Indexed: 02/07/2023]
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Bessone F, Razori MV, Roma MG. Molecular pathways of nonalcoholic fatty liver disease development and progression. Cell Mol Life Sci 2019; 76:99-128. [PMID: 30343320 PMCID: PMC11105781 DOI: 10.1007/s00018-018-2947-0] [Citation(s) in RCA: 344] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 02/06/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a main hepatic manifestation of metabolic syndrome. It represents a wide spectrum of histopathological abnormalities ranging from simple steatosis to nonalcoholic steatohepatitis (NASH) with or without fibrosis and, eventually, cirrhosis and hepatocellular carcinoma. While hepatic simple steatosis seems to be a rather benign manifestation of hepatic triglyceride accumulation, the buildup of highly toxic free fatty acids associated with insulin resistance-induced massive free fatty acid mobilization from adipose tissue and the increased de novo hepatic fatty acid synthesis from glucose acts as the "first hit" for NAFLD development. NAFLD progression seems to involve the occurrence of "parallel, multiple-hit" injuries, such as oxidative stress-induced mitochondrial dysfunction, endoplasmic reticulum stress, endotoxin-induced, TLR4-dependent release of inflammatory cytokines, and iron overload, among many others. These deleterious factors are responsible for the triggering of a number of signaling cascades leading to inflammation, cell death, and fibrosis, the hallmarks of NASH. This review is aimed at integrating the overwhelming progress made in the characterization of the physiopathological mechanisms of NAFLD at a molecular level, to better understand the factor influencing the initiation and progression of the disease.
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Affiliation(s)
- Fernando Bessone
- Hospital Provincial del Centenario, Facultad de Ciencias Médicas, Servicio de Gastroenterología y Hepatología, Universidad Nacional de Rosario, Rosario, Argentina
| | - María Valeria Razori
- Instituto de Fisiología Experimental (IFISE-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 570, 2000, Rosario, Argentina
| | - Marcelo G Roma
- Instituto de Fisiología Experimental (IFISE-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 570, 2000, Rosario, Argentina.
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Abstract
Liver fibrosis is a wound-healing response generated against an insult to the liver that causes liver injury. It has the potential to progress into cirrhosis, and if not prevented, it may lead to liver cancer and liver failure. The activation of hepatic stellate cells (HSCs) is the central event underlying liver fibrosis. In addition to HSCs, numerous studies have supported the potential contribution of bone marrow-derived cells and myofibroblasts to liver fibrosis. The liver is a heterogeneous organ; thus, molecular and cellular events that underlie liver fibrogenesis are complex. This review aims to focus on major events that occur during liver fibrogenesis. In addition, important antifibrotic therapeutic approaches and experimental liver fibrosis models will be discussed.
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Affiliation(s)
- M Merve Aydın
- Mikrogen Genetic Diagnostic Laboratory, Ankara, Turkey
| | - Kamil Can Akçalı
- Department of Biophysics, Ankara University, School of Medicine, Ankara, Turkey
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Discovery of Matrinic Thiadiazole Derivatives as a Novel Family of Anti-Liver Fibrosis Agents via Repression of the TGFβ/Smad Pathway. Molecules 2018; 23:molecules23071644. [PMID: 29976890 PMCID: PMC6099493 DOI: 10.3390/molecules23071644] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 06/29/2018] [Accepted: 06/30/2018] [Indexed: 01/10/2023] Open
Abstract
A series of novel matrinic thiadiazole derivatives were designed, synthesized and evaluated for their inhibitory effect on COL1A1 promotor. The SAR indicated that: (i) the introduction of a thiadiazole on the 11-side chain was beneficial for activity; (ii) a 12-N-benzyl moiety was favorable for activity. Among them, compound 6n displayed a high activity with an inhibitory rate of 39.7% at a concentration of 40 μM. It also effectively inhibited the expression of two representative collagen proteins (COL1A1 and α-SMA) on both the mRNA and protein levels and showed a high safety profile in vivo, indicating its great promise as an anti-liver fibrosis agent. Further study indicated that it might repress hepatic fibrogenesis via the TGFβ/Smad pathway. This study provided powerful information for further strategic optimization and the top compound 6n was selected for further study as an ideal liver fibrosis lead for next investigation.
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Ali MA, Lacin S, Abdel-Wahab R, Uemura M, Hassan M, Rashid A, Duda DG, Kaseb AO. Nonalcoholic steatohepatitis-related hepatocellular carcinoma: is there a role for the androgen receptor pathway? Onco Targets Ther 2017; 10:1403-1412. [PMID: 28424556 PMCID: PMC5344425 DOI: 10.2147/ott.s111681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The epidemic of insulin resistance, obesity, and metabolic syndrome has led to the emergence of nonalcoholic steatohepatitis (NASH) as the most common cause of liver disease in the US. Patients with NASH are at an increased risk for hepatic disease-related morbidity and death, and chronic inflammation in NASH patients can lead to hepatocellular carcinoma (HCC). The prevalence of HCC is higher in males than in females, and genetic studies have identified androgen and androgen receptors (ARs) as partially responsible for the gender disparity in the development of liver disease and HCC. Although many factors are known to play important roles in the progression of inflammation in NASH patients, the role of androgen and AR in the progression of NASH to HCC has been understudied. This review summarizes the evidence for a potential role of androgen and the AR pathway in the development of NASH-related HCC and in the treatment of HCC. It has been proposed that AR plays a role in the progression of HCC: inhibitory roles in early stages of hepatocarcinogenesis and tumor-promoting roles in advanced stages. AR can be activated by several pathways, even in the absence of androgen. While AR has been explored as a potential therapeutic target in HCC, several clinical trials have failed to demonstrate a clinical benefit of antiandrogen drugs in HCC. This review discusses the potential reason for these observations and discuss the potential future trials design in this important setting.
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Affiliation(s)
- Mahmoud A Ali
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sahin Lacin
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Reham Abdel-Wahab
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Clinical Oncology, Assiut University, Assiut, Egypt
| | - Mark Uemura
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Manal Hassan
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Asif Rashid
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Dan G Duda
- Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Ahmed O Kaseb
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Kon K, Ikejima K, Morinaga M, Kusama H, Arai K, Aoyama T, Uchiyama A, Yamashina S, Watanabe S. L-carnitine prevents metabolic steatohepatitis in obese diabetic KK-A y mice. Hepatol Res 2017; 47:E44-E54. [PMID: 27062266 DOI: 10.1111/hepr.12720] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/03/2016] [Accepted: 04/05/2016] [Indexed: 02/08/2023]
Abstract
AIM Pharmacological treatment for metabolic syndrome-related non-alcoholic steatohepatitis has not been established. We investigated the effect of L-carnitine, an essential substance for β-oxidation, on metabolic steatohepatitis in mice. METHODS Male KK-Ay mice were fed a high-fat diet (HFD) for 8 weeks, with supplementation of L-carnitine (1.25 mg/mL) in drinking water for the latter 4 weeks. RESULTS Serum total carnitine levels were decreased following HFD feeding, whereas the levels were reversed almost completely by L-carnitine supplementation. In mice given L-carnitine, exacerbation of hepatic steatosis and hepatocyte apoptosis was markedly prevented even though HFD feeding was continued. Body weight gain, as well as hyperlipidemia, hyperglycemia, and hyperinsulinemia, following HFD feeding were also significantly prevented in mice given L-carnitine. High-fat diet feeding elevated hepatic expression levels of carnitine palmitoyltransferase 1A mRNA; however, production of β-hydroxybutyrate in the liver was not affected by HFD alone. In contrast, L-carnitine treatment significantly increased hepatic β-hydroxybutyrate contents in HFD-fed mice. L-carnitine also blunted HFD induction in sterol regulatory element binding protein-1c mRNA in the liver. Furthermore, L-carnitine inhibited HFD-induced serine phosphorylation of insulin receptor substrate-1 in the liver. L-carnitine decreased hepatic free fatty acid content in 1 week, with morphological improvement of swollen mitochondria in hepatocytes, and increases in hepatic adenosine 5'-triphosphate content. CONCLUSIONS L-carnitine ameliorates steatohepatitis in KK-Ay mice fed an HFD, most likely through facilitating mitochondrial β-oxidation, normalizing insulin signals, and inhibiting de novo lipogenesis in the liver. It is therefore postulated that supplementation of L-carnitine is a promising approach for prevention and treatment of metabolic syndrome-related non-alcoholic steatohepatitis.
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Affiliation(s)
- Kazuyoshi Kon
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kenichi Ikejima
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Maki Morinaga
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Hiromi Kusama
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kumiko Arai
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Tomonori Aoyama
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Akira Uchiyama
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Shunhei Yamashina
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
| | - Sumio Watanabe
- Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan
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Wei J, Zhen YZ, Cui J, He FL, Shen T, Hu G, Ren XH, Lin YJ. Rhein lysinate decreases inflammation and adipose infiltration in KK/HlJ diabetic mice with non-alcoholic fatty liver disease. Arch Pharm Res 2016; 39:960-9. [PMID: 27277164 DOI: 10.1007/s12272-016-0770-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 06/02/2016] [Indexed: 01/02/2023]
Abstract
The objective of this study was to investigate the protective effects of rhein lysinate (RHL) on the liver. Mice were divided into four groups: C57BL/J control, the KK/HlJ diabetic model, and 25 and 50 mg/kg/day RHL-treated KK/HlJ groups. The KK/HlJ diabetic mouse model was made by injecting STZ and feeding mice diabetic food. At 16 weeks, mice were sacrificed and their livers were harvested. The results indicated that compared with the C57BL/J control group, the body weights, liver weights and liver weight-to-body weight ratio were increased in KK/HlJ diabetic mice; however, these values were decreased following treatment with RHL. Compared with the C57BL/J control, KK/HlJ diabetic mice had a significantly lower level of SOD and GSH-px in their livers, but had a significantly higher level of MDA. However, these effects were ameliorated by RHL. Hepatic adipose infiltration was observed in KK/HlJ mice, but not in C57BL/J mice. RHL decreased the incidence of hepatic adipose infiltration and significantly decreased the expression of TNF-α, IL-6, NF-κB, SREBP-1c, and Fas, as well as the phosphorylation of NF-κB in the liver. In conclusion, RHL can improve hepatic function by decreasing hepatic adipose infiltration and the expression of inflammatory factors.
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Affiliation(s)
- Jie Wei
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China
| | - Yong-Zhan Zhen
- Department of Histology and Embryology, Basic Medical College of Hebei United University, Tangshan, 063000, Hebei, China
| | - Ju Cui
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China
| | - Fa-Lin He
- National Center for Clinical Laboratories, Beijing Hospital, Beijing, 100730, China
| | - Tao Shen
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China
| | - Gang Hu
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China
| | - Xiao-Hong Ren
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China
| | - Ya-Jun Lin
- The Key Laboratory of Geriatrics, Beijing Hospital & Beijing Institute of Geriatrics, Ministry of Health, No. 1 Dahua Road, Dongdan, Dongcheng District, Beijing, 100730, China.
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Strategies to prevent and reverse liver fibrosis in humans and laboratory animals. Arch Toxicol 2015; 89:1727-50. [PMID: 25963329 DOI: 10.1007/s00204-015-1525-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 04/28/2015] [Indexed: 02/07/2023]
Abstract
Liver fibrosis results from chronic damage to the liver in conjunction with various pathways and is mediated by a complex microenvironment. Based on clinical observations, it is now evident that fibrosis is a dynamic, bidirectional process with an inherent capacity for recovery and remodeling. The major mechanisms involved in liver fibrosis include the repetitive injury of hepatocytes, the activation of the inflammatory response after injury stimulation, and the activation and proliferation of hepatic stellate cells (HSCs), which represents the major extracellular matrix (ECM)-producing cells, stimulated by hepatocyte injury and inflammation. The microenvironment in the liver is synergistically regulated abnormal ECM deposition, scar formation, angiogenesis, and fibrogenesis. Moreover, recent studies have clarified novel mechanism in fibrosis such as epigenetic regulation of HSCs, the leptin and PPARγ pathways, the coagulation system, and even autophagy. Uncovering the mechanisms of liver fibrogenesis provides a basis to develop potential therapies to reverse and treat the fibrotic response, thereby improving the outcomes of patients with chronic liver disease. Although both scientific and clinical challenges remain, emerging studies attempt to reveal the ideal anti-fibrotic drug that could be easily delivered to the liver with high specificity and low toxicity. This review highlights the mechanisms, including novel pathways underlying fibrogenesis that may be translated into preventive and treatment strategies, reviews both current and novel agents that target specific pathways or multiple targets, and discusses novel drug delivery systems such as nanotechnology that can be applied in the treatment of liver fibrosis. In addition, we also discuss some current treatment strategies that are being applied in animal models and in clinical trials.
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Amoras EDSG, Gomes STM, Freitas FB, Santana BB, Ishak G, de Araújo MTF, Demachki S, da Silva Conde SRS, de Oliveira Guimarães Ishak M, Ishak R, Vallinoto ACR. NGF and P75NTR gene expression is associated with the hepatic fibrosis stage due to viral and non-viral causes. PLoS One 2015; 10:e0121754. [PMID: 25816145 PMCID: PMC4376854 DOI: 10.1371/journal.pone.0121754] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/03/2015] [Indexed: 01/22/2023] Open
Abstract
This study evaluated the relative mRNA expression levels of nerve growth factor (NGF) and the p75 neurothrophin receptor (p75NTR) in different histological stages of human liver disease. Fifty-one liver biopsy specimens obtained from patients with hepatitis B virus (n = 6), hepatitis C virus (n = 28), and non-viral hepatitis – (n = 9) and standard histological liver (n = 8) as controls (CT) were subjected to qPCR and histopathological exams. Our data revealed a significant difference in the NGF expression levels between the three patient groups and the Control group. p75NTR expression levels in the HCV and NVH groups were higher than those observed in the HBV and Control groups. In cases of liver cirrhosis, higher p75NTR mRNA expression was observed, whereas NGF was expressed at higher levels in patients with hepatic fibrosis. NGF expression was lower in the F1 liver fibrosis stage, and p75NTR receptor expression continuously and proportionately increased compared to the increase in the degree of fibrosis and was significantly higher in livers in fibrosis stages 3 and 4. The hepatic levels of NGF and p75NTR were decreased and increased, respectively, relative to the stage of inflammatory activity. A positive correlation between p75NTR and NGF gene expression was observed in livers with mild to moderate fibrosis, though not in cases of severe fibrosis and cirrhosis.
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Affiliation(s)
- Ednelza da Silva Graça Amoras
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Samara Tatielle Monteiro Gomes
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Felipe Bonfim Freitas
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Bárbara Brasil Santana
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Geraldo Ishak
- João de Barros Barreto Hospital, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | | | - Sâmia Demachki
- School of Medicine, Institute of Health Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Simone Regina Souza da Silva Conde
- School of Medicine, Institute of Health Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
- Hepatology Outpatient Service, Holy House of Mercy Foundation of Pará (Santa Casa de Misericórdia do Pará), Belém, Pará, Brazil
| | | | - Ricardo Ishak
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
| | - Antonio Carlos Rosário Vallinoto
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (Universidade Federal do Pará—UFPA), Belém, Pará, Brazil
- * E-mail:
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Li M, Guo K, Vanella L, Taketani S, Adachi Y, Ikehara S. Stem cell transplantation upregulates Sirt1 and antioxidant expression, ameliorating fatty liver in type 2 diabetic mice. Int J Biol Sci 2015; 11:472-81. [PMID: 25798066 PMCID: PMC4366645 DOI: 10.7150/ijbs.10809] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 02/02/2015] [Indexed: 01/01/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is associated with insulin resistance, oxidative stress, and obesity. The db/db mouse model displays increased levels of insulin resistance, obesity, and an over-accumulation of hepatic triglycerides, making it an excellent model for studying NAFLD. In db/db mice, intra-bone marrow-bone marrow transplantation plus thymus transplantation (IBM-BMT+TT) improves type 2 diabetes mellitus (T2 DM) by normalizing the T-cell imbalance. We hypothesized that this approach would improve Sirt1 expression in the liver and benefit liver development. The db/db mice were treated with IBM-BMT+TT, and plasma MCP-1, IL-6, adiponection, LDL, Sirt1, and HO-1 levels were then assessed. Stem cell transplantation decreased the levels of plasma inflammatory cytokines and LDL while it increased the expression of Sirt1 and HO-1, resulting in decreased progression of fatty liver. Moreover, Sirt1 and HO-1 expression were both detected in the thymus and many HO-1-positive cells were observed in the bone marrow. This is the first report of stem cell transplantation improving the antioxidant function in the liver, thymus, and bone marrow of db/db mice by increasing the levels of Sirt1 and HO-1. This approach may prove useful in the treatment of nonalcoholic steatohepatitis and its clinical manifestations.
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Affiliation(s)
- Ming Li
- 1. Department of Stem Cell Disorders, Kansai Medical University, Hirakata City, Osaka, Japan
| | - Kequan Guo
- 2. Department of Cardiac Surgery, Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing Anzhen Hospital Affiliated to Capital Medical University, Beijing, China
| | - Luca Vanella
- 3. Department of Drug Science, Section of Biochemistry, University of Catania, Catania, Italy
| | - Shigeru Taketani
- 4. Department of Biotechnology, Kyoto Institute of Technology, Kyoto, Japan
| | - Yasushi Adachi
- 5. Division of Surgical Pathology, Toyooka Hospital, Hyogo, Japan
| | - Susumu Ikehara
- 1. Department of Stem Cell Disorders, Kansai Medical University, Hirakata City, Osaka, Japan
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Dattaroy D, Pourhoseini S, Das S, Alhasson F, Seth RK, Nagarkatti M, Michelotti GA, Diehl AM, Chatterjee S. Micro-RNA 21 inhibition of SMAD7 enhances fibrogenesis via leptin-mediated NADPH oxidase in experimental and human nonalcoholic steatohepatitis. Am J Physiol Gastrointest Liver Physiol 2015; 308:G298-312. [PMID: 25501551 PMCID: PMC4329476 DOI: 10.1152/ajpgi.00346.2014] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hepatic fibrosis in nonalcoholic steatohepatitis (NASH) is the common pathophysiological process resulting from chronic liver inflammation and oxidative stress. Although significant research has been carried out on the role of leptin-induced NADPH oxidase in fibrogenesis, the molecular mechanisms that connect the leptin-NADPH oxidase axis in upregulation of transforming growth factor (TGF)-β signaling have been unclear. We aimed to investigate the role of leptin-mediated upregulation of NADPH oxidase and its subsequent induction of micro-RNA 21 (miR21) in fibrogenesis. Human NASH livers and a high-fat (60% kcal) diet-fed chronic mouse model, where hepatotoxin bromodichloromethane was used to induce NASH, were used for this study. To prove the role of the leptin-NADPH oxidase-miR21 axis, mice deficient in genes for leptin, p47phox, and miR21 were used. Results showed that wild-type mice and human livers with NASH had increased oxidative stress, increased p47phox expression, augmented NF-κB activation, and increased miR21 levels. These mice and human livers showed increased TGF-β, SMAD2/3-SMAD4 colocalizations in the nucleus, increased immunoreactivity against Col1α, and α-SMA with a concomitant decrease in protein levels of SMAD7. Mice that were deficient in leptin or p47phox had decreased activated NF-κB and miR21 levels, suggesting the role of leptin and NADPH oxidase in inducing NF-κB-mediated miR21 expression. Further miR21 knockout mice had decreased colocalization events of SMAD2/3-SMAD4 in the nucleus, increased SMAD7 levels, and decreased fibrogenesis. Taken together, the studies show the novel role of leptin-NADPH oxidase induction of miR21 as a key regulator of TGF-β signaling and fibrogenesis in experimental and human NASH.
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Affiliation(s)
- Diptadip Dattaroy
- 1Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
| | - Sahar Pourhoseini
- 1Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
| | - Suvarthi Das
- 1Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
| | - Firas Alhasson
- 1Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
| | - Ratanesh Kumar Seth
- 1Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
| | - Mitzi Nagarkatti
- 2Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina;
| | | | - Anna Mae Diehl
- 3Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina;
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Polyzos SA, Kountouras J, Mantzoros CS. Leptin in nonalcoholic fatty liver disease: a narrative review. Metabolism 2015; 64:60-78. [PMID: 25456097 DOI: 10.1016/j.metabol.2014.10.012] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 10/12/2014] [Accepted: 10/16/2014] [Indexed: 02/06/2023]
Abstract
Leptin, the first described adipokine, interplays with hepatic metabolism. The aim of this review was to summarize available data on the association between leptin and nonalcoholic fatty liver disease (NAFLD). Leptin has a potential dual action on NAFLD experimental models, exerting a possible anti-steatotic, but also a proinflammatory and profibrogenic action. Observational clinical studies have shown higher or similar leptin levels between simple steatosis and nonalcoholic steatohepatitis (NASH) compared with controls. Interventional studies showed that circulating leptin diminishes together with body mass index after successful weight loss following lifestyle modifications or bariatric surgery. Studies providing evidence for the effect of other medications on leptin levels in NAFLD populations are limited and of low power. Data from small studies claim that recombinant leptin administration had a possibly beneficial effect on steatosis, but not fibrosis, in NAFLD patients with hypoleptinemia. Although the aforementioned dual leptin action has not yet been validated in humans, leptin administration in NAFLD patients with normoleptinemia or hyperleptinemia is discouraged. Further well-controlled studies in cautiously selected populations are needed to elucidate whether leptin has any prognostic and therapeutic role in NAFLD patients.
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Affiliation(s)
- Stergios A Polyzos
- Second Medical Clinic, Department of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Greece; Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Jannis Kountouras
- Second Medical Clinic, Department of Medicine, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Greece
| | - Christos S Mantzoros
- Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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Wai KK, Liang Y, Zhou L, Cai L, Liang C, Liu L, Lin X, Wu H, Lin J. The protective effects ofAcanthus ilicifoliusalkaloid A and its derivatives on pro- and anti-inflammatory cytokines in rats with hepatic fibrosis. Biotechnol Appl Biochem 2014; 62:537-46. [DOI: 10.1002/bab.1292] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 09/05/2014] [Indexed: 12/28/2022]
Affiliation(s)
- Kyi Kyi Wai
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Yinge Liang
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Lijuan Zhou
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Liping Cai
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Chunhong Liang
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Lin Liu
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Xing Lin
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
| | - Huahui Wu
- Department of Inorganic Chemistry and Physical Chemistry; Guangxi Medical University; Nanning People's Republic of China
| | - Jun Lin
- Department of Pharmacology; Guangxi Medical University; Nanning People's Republic of China
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Seth RK, Das S, Pourhoseini S, Dattaroy D, Igwe S, Ray JB, Fan D, Michelotti GA, Diehl AM, Chatterjee S. M1 polarization bias and subsequent nonalcoholic steatohepatitis progression is attenuated by nitric oxide donor DETA NONOate via inhibition of CYP2E1-induced oxidative stress in obese mice. J Pharmacol Exp Ther 2014; 352:77-89. [PMID: 25347994 DOI: 10.1124/jpet.114.218131] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Activation of M1 macrophages in nonalcoholic steatohepatitis (NASH) is produced by several external or endogenous factors: inflammatory stimuli, oxidative stress, and cytokines are known. However, any direct role of oxidative stress in causing M1 polarization in NASH has been unclear. We hypothesized that CYP2E1-mediated oxidative stress causes M1 polarization in experimental NASH, and that nitric oxide (NO) donor administration inhibits CYP2E1-mediated inflammation with concomitant attenuation of M1 polarization. Because CYP2E1 takes center stage in these studies, we used a toxin model of NASH that uses a ligand and a substrate of CYP2E1 for inducing NASH. Subsequently, we used a methionine and choline-deficient diet-induced rodent NASH model where the role of CYP2E1 in disease progression has been shown. Our results show that CYP2E1 causes M1 polarization bias, which includes a significant increase in interleukin-1β (IL-1β) and IL-12 in both models of NASH, whereas CYP2E1-null mice or diallyl sulfide administration prevented it. Administration of gadolinium chloride (GdCl3), a macrophage toxin, attenuated both the initial M1 response and the subsequent M2 response, showing that the observed increase in cytokine levels is primarily from macrophages. Based on the evidence of an adaptive NO increase, the NO donor administration in vivo that mechanistically inhibited CYP2E1 catalyzed the oxidative stress during the entire study in NASH-abrogated M1 polarization and NASH progression. The results obtained show the association of CYP2E1 in M1 polarization, and that inhibition of CYP2E1 catalyzed oxidative stress by an NO donor (DETA NONOate [(Z)-1-[N-(2-aminoethyl)-N-(2-ammonioethyl)amino]diazen-1-ium-1,2-diolate]) can be a promising therapeutic strategy in NASH.
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Affiliation(s)
- Ratanesh Kumar Seth
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Suvarthi Das
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Sahar Pourhoseini
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Diptadip Dattaroy
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Stephen Igwe
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Julie Basu Ray
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Daping Fan
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Gregory A Michelotti
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Anna Mae Diehl
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina (R.K.S., S.D., S.P., D.D., S.C.); School of Science, Technology, Engineering and Mathematics (STEM), Dillard University, New Orleans, Louisiana (S.I., J.B.R.); Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina (D.F.); and Division of Gastroenterology, Duke University, Durham, North Carolina (G.A.M., A.M.D.)
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Kumar P, Smith T, Rahman K, Thorn NE, Anania FA. Adiponectin agonist ADP355 attenuates CCl4-induced liver fibrosis in mice. PLoS One 2014; 9:e110405. [PMID: 25310107 PMCID: PMC4195748 DOI: 10.1371/journal.pone.0110405] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 09/15/2014] [Indexed: 12/29/2022] Open
Abstract
Liver fibrosis is a growing global health problem characterized by excess deposition of fibrillar collagen, and activation of hepatic stellate cells (HSCs). Adiponectin is known to possess anti-fibrotic properties; however a high physiological concentration and multiple forms circulating in blood prohibit clinical use. Recently, an adiponectin-like small synthetic peptide agonist (ADP355: H-DAsn-Ile-Pro-Nva-Leu-Tyr-DSer-Phe-Ala-DSer-NH2) was synthesized for the treatment of murine breast cancer. The present study was designed to evaluate the efficacy of ADP355 as an anti-fibrotic agent in the in vivo carbon tetrachloride (CCl4)-induced liver fibrosis model. Liver fibrosis was induced in eight-week old male C57BL/6J mice by CCl4-gavage every other day for four weeks before injection of a nanoparticle-conjugated with ADP355 (nano-ADP355). Control gold nanoparticles and nano-ADP355 were administered by intraperitoneal injection for two weeks along with CCl4-gavage. All mice were sacrificed after 6 weeks, and serum and liver tissue were collected for biochemical, histopathologic and molecular analyses. Biochemical studies suggested ADP355 treatment attenuates liver fibrosis, determined by reduction of serum aspartate aminotransferase (AST), alanine aminotransferase ALT) and hydroxyproline. Histopathology revealed chronic CCl4-treatment results in significant fibrosis, while ADP355 treatment induced significantly reversed fibrosis. Key markers for fibrogenesis-α-smooth muscle actin (α-SMA), transforming growth factor-beta1 (TGF-β1), connective tissue growth factor (CTGF), and the tissue inhibitor of metalloproteinase I (TIMP1) were also markedly attenuated. Conversely, liver lysates from ADP355 treated mice increased phosphorylation of both endothelial nitric oxide synthase (eNOS) and AMPK while AKT phosphorylation was diminished. These findings suggest ADP355 is a potent anti-fibrotic agent that can be an effective intervention against liver fibrosis.
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Affiliation(s)
- Pradeep Kumar
- Emory University School of Medicine, Department of Medicine, Division of Digestive Diseases, Atlanta, GA, United States of America
| | - Tekla Smith
- Emory University School of Medicine, Department of Medicine, Division of Digestive Diseases, Atlanta, GA, United States of America
| | - Khalidur Rahman
- Emory University School of Medicine, Department of Medicine, Division of Digestive Diseases, Atlanta, GA, United States of America
| | - Natalie E. Thorn
- Emory University School of Medicine, Department of Medicine, Division of Digestive Diseases, Atlanta, GA, United States of America
| | - Frank A. Anania
- Emory University School of Medicine, Department of Medicine, Division of Digestive Diseases, Atlanta, GA, United States of America
- * E-mail:
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Acute ethanol causes hepatic mitochondrial depolarization in mice: role of ethanol metabolism. PLoS One 2014; 9:e91308. [PMID: 24618581 PMCID: PMC3950152 DOI: 10.1371/journal.pone.0091308] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 02/12/2014] [Indexed: 12/20/2022] Open
Abstract
Background/Aims An increase of ethanol metabolism and hepatic mitochondrial respiration occurs in vivo after a single binge of alcohol. Here, our aim was to determine how ethanol intake affects hepatic mitochondrial polarization status in vivo in relation to ethanol metabolism and steatosis. Methods Hepatic mitochondrial polarization, permeability transition (MPT), and reduce pyridine nucleotides, and steatosis in mice were monitored by intravital confocal/multiphoton microscopy of the fluorescence of rhodamine 123 (Rh123), calcein, NAD(P)H, and BODIPY493/503, respectively, after gavage with ethanol (1–6 g/kg). Results Mitochondria depolarized in an all-or-nothing fashion in individual hepatocytes as early as 1 h after alcohol. Depolarization was dose- and time-dependent, peaked after 6 to 12 h and maximally affected 94% of hepatocytes. This mitochondrial depolarization was not due to onset of the MPT. After 24 h, mitochondria of most hepatocytes recovered normal polarization and were indistinguishable from untreated after 7 days. Cell death monitored by propidium iodide staining, histology and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) was low throughout. After alcohol, mitochondrial NAD(P)H autofluorescence increased and decreased, respectively, in hepatocytes with polarized and depolarized mitochondria. Ethanol also caused steatosis mainly in hepatocytes with depolarized mitochondria. Depolarization was linked to ethanol metabolism, since deficiency of alcohol dehydrogenase and cytochrome-P450 2E1 (CYP2E1), the major ethanol-metabolizing enzymes, decreased mitochondrial depolarization by ∼70% and ∼20%, respectively. Activation of aldehyde dehydrogenase decreased depolarization, whereas inhibition of aldehyde dehydrogenase enhanced depolarization. Activation of aldehyde dehydrogenase also markedly decreased steatosis. Conclusions Acute ethanol causes reversible hepatic mitochondrial depolarization in vivo that may contribute to steatosis and increased mitochondrial respiration. Onset of this mitochondrial depolarization is linked, at least in part, to metabolism of ethanol to acetaldehyde.
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Rahman R, Hammoud GM, Almashhrawi AA, Ahmed KT, Ibdah JA. Primary hepatocellular carcinoma and metabolic syndrome: An update. World J Gastrointest Oncol 2013; 5:186-94. [PMID: 24069511 PMCID: PMC3782682 DOI: 10.4251/wjgo.v5.i9.186] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 08/14/2013] [Accepted: 08/20/2013] [Indexed: 02/05/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver malignancy. The incidence of hepatocellular carcinoma has increased dramatically by 80% over the past two decades in the United States. Numerous basic science and clinical studies have documented a strong association between hepatocellular carcinoma and the metabolic syndrome. These studies have documented that, in most patients, non-alcoholic fatty liver disease is the hepatic manifestation of the metabolic syndrome, which may progress to hepatocellular carcinoma through the cirrhotic process. However, minority of patients with non-alcoholic fatty liver disease may progress to hepatocellular carcinoma without cirrhosis. This review summarizes the current literature of the link between hepatocellular carcinoma and metabolic syndrome with special emphasis on various components of the metabolic syndrome including risk of association with obesity, diabetes mellitus, hyperlipidemia, and hypertension. Current understanding of pathophysiology, clinical features, treatments, outcomes, and surveillance of hepatocellular carcinoma in the background of metabolic syndrome and non-alcoholic fatty liver disease is reviewed. With the current epidemic of metabolic syndrome, the number of patients with non-alcoholic fatty liver disease is increasing. Subsequently, it is expected that the incidence and prevalence of HCC will also increase. It is very important for the scientific community to shed more light on the pathogenesis of HCC with metabolic syndrome, both with and without cirrhosis. At the same time it is also important to quantify the risk of hepatocellular carcinoma associated with the metabolic syndrome in a prospective setting and develop surveillance recommendations for detection of hepatocellular carcinoma in patients with metabolic syndrome.
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Machado MV, Cortez-Pinto H. Leptin in the treatment of lipodystrophy-associated nonalcoholic fatty liver disease: are we there already? Expert Rev Gastroenterol Hepatol 2013; 7:513-5. [PMID: 23985000 DOI: 10.1586/17474124.2013.814903] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Evaluation of: In general, nonalcoholic fatty liver disease (NAFLD) consists of ectopic fat accumulation in the liver, when the ability to store fat in inert reservoirs is overcome. That occurs either when we have an excess of energy/fat such as in obesity, or when adipose tissue is defective, not being able to store even regular amounts of energy, such as in lipodystrophies (LDs). LD associates with metabolic deregulation: insulin resistance/diabetes mellitus and dyslipidemia. Several small studies have shown a beneficial effect of leptin replacement, an adipocyte-derived hormone, in the metabolic profile of patients with LD. The paper under evaluation studied 50 patients with LD-associated NAFLD treated with leptin, suggesting a beneficial effect in liver histology and in decreasing not only steatosis, but also nonalcoholic steatohepatitis, although with no effect on fibrosis after 2 years of treatment.
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Moon HS, Dalamaga M, Kim SY, Polyzos SA, Hamnvik OP, Magkos F, Paruthi J, Mantzoros CS. Leptin's role in lipodystrophic and nonlipodystrophic insulin-resistant and diabetic individuals. Endocr Rev 2013; 34:377-412. [PMID: 23475416 PMCID: PMC3660716 DOI: 10.1210/er.2012-1053] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Leptin is an adipocyte-secreted hormone that has been proposed to regulate energy homeostasis as well as metabolic, reproductive, neuroendocrine, and immune functions. In the context of open-label uncontrolled studies, leptin administration has demonstrated insulin-sensitizing effects in patients with congenital lipodystrophy associated with relative leptin deficiency. Leptin administration has also been shown to decrease central fat mass and improve insulin sensitivity and fasting insulin and glucose levels in HIV-infected patients with highly active antiretroviral therapy (HAART)-induced lipodystrophy, insulin resistance, and leptin deficiency. On the contrary, the effects of leptin treatment in leptin-replete or hyperleptinemic obese individuals with glucose intolerance and diabetes mellitus have been minimal or null, presumably due to leptin tolerance or resistance that impairs leptin action. Similarly, experimental evidence suggests a null or a possibly adverse role of leptin treatment in nonlipodystrophic patients with nonalcoholic fatty liver disease. In this review, we present a description of leptin biology and signaling; we summarize leptin's contribution to glucose metabolism in animals and humans in vitro, ex vivo, and in vivo; and we provide insights into the emerging clinical applications and therapeutic uses of leptin in humans with lipodystrophy and/or diabetes.
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Affiliation(s)
- Hyun-Seuk Moon
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
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Hui E, Xu A, Bo Yang H, Lam KSL. Obesity as the common soil of non-alcoholic fatty liver disease and diabetes: Role of adipokines. J Diabetes Investig 2013; 4:413-25. [PMID: 24843689 PMCID: PMC4025109 DOI: 10.1111/jdi.12093] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 03/06/2013] [Accepted: 03/11/2013] [Indexed: 12/18/2022] Open
Abstract
Non‐alcoholic fatty liver disease (NAFLD) describes a spectrum of liver conditions from simple steatosis, steatohepatitis to end‐stage liver disease. The prevalence of NAFLD has been on the rise in many parts of the world, including Asia, and NAFLD is now the liver disease associated with the highest mortality, consequent to the increased risk of cardiovascular diseases and hepatocellular carcinoma. Whereas NAFLD is an independent risk factor for type 2 diabetes, increased hepatic and peripheral insulin resistance contribute to the pathogenesis of both NAFLD and diabetes, which are associated with enhanced cardiovascular risk. Studies in humans and animal models have suggested obesity as the common link of these two diseases, likely mediated by adipose tissue inflammation and dysregulated adipokine production in obesity. In the present review, we discuss recent advances in our understanding of the role of several novel adipokines (adiponectin, adipocyte fatty acid binding protein and fibroblast growth factor‐21) in the pathophysiology of NAFLD and diabetes, as well as their use as potential biomarkers and therapeutic targets for dysglycemia in NAFLD patients.
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Affiliation(s)
- Elaine Hui
- Endocrinology and Metabolism Division Department of Medicine the University of Hong Kong Hong Kong China
| | - Aimin Xu
- Research Centre of Heart, Brain, Hormone and Healthy Aging the University of Hong Kong Hong Kong China
| | - Hong Bo Yang
- Department of Endocrinology Peking Union Medical College Hospital Beijing China
| | - Karen S L Lam
- Endocrinology and Metabolism Division Department of Medicine the University of Hong Kong Hong Kong China ; Research Centre of Heart, Brain, Hormone and Healthy Aging the University of Hong Kong Hong Kong China
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Liu Y, Meyer C, Xu C, Weng H, Hellerbrand C, ten Dijke P, Dooley S. Animal models of chronic liver diseases. Am J Physiol Gastrointest Liver Physiol 2013; 304:G449-68. [PMID: 23275613 DOI: 10.1152/ajpgi.00199.2012] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Chronic liver diseases are frequent and potentially life threatening for humans. The underlying etiologies are diverse, ranging from viral infections, autoimmune disorders, and intoxications (including alcohol abuse) to imbalanced diets. Although at early stages of disease the liver regenerates in the absence of the insult, advanced stages cannot be healed and may require organ transplantation. A better understanding of underlying mechanisms is mandatory for the design of new drugs to be used in clinic. Therefore, rodent models are being developed to mimic human liver disease. However, no model to date can completely recapitulate the "corresponding" human disorder. Limiting factors are the time frame required in humans to establish a certain liver disease and the fact that rodents possess a distinct immune system compared with humans and have different metabolic rates affecting liver homeostasis. These features account for the difficulties in developing adequate rodent models for studying disease progression and for testing new pharmaceuticals to be translated into the clinic. Nevertheless, traditional and new promising animal models that mimic certain attributes of chronic liver diseases are established and being used to deepen our understanding in the underlying mechanisms of distinct liver diseases. This review aims at providing a comprehensive overview of recent advances in animal models recapitulating different features and etiologies of human liver diseases.
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Affiliation(s)
- Yan Liu
- Department of Medicine II, Section Molecular Hepatology-Alcohol Associated Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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Abstract
Nonalcoholic fatty liver disease (NAFLD), the most common liver disorder worldwide, encompasses a spectrum of abnormal liver histology ranging from simple steatosis to nonalcoholic steatohepatitis (NASH) and cirrhosis. Population studies show that NAFLD is strongly associated with insulin resistance, obesity, type 2 diabetes mellitus, and lipid abnormalities. In the context of hepatic steatosis, factors that promote cell injury, inflammation, and fibrosis include oxidative stress, early mitochondrial dysfunction, endoplasmic reticulum stress, iron accumulation, apoptosis, adipocytokines, and stellate cell activation. The exact NASH prevalence is unknown because of the absence of simple noninvasive diagnostic tests. Although liver biopsy is the "gold standard" for the diagnosis of NASH, other tests are needed to facilitate the diagnosis and greatly reduce the requirement for invasive liver biopsy. In addition, the development of new fibrosis markers in NASH is needed to facilitate the assessment of its progression and the effectiveness of new therapies. The aim of this chapter, which is overview of biomarkers in NASH, is to establish a systematic approach to laboratory findings of the disease.
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Spruss A, Henkel J, Kanuri G, Blank D, Püschel GP, Bischoff SC, Bergheim I. Female mice are more susceptible to nonalcoholic fatty liver disease: sex-specific regulation of the hepatic AMP-activated protein kinase-plasminogen activator inhibitor 1 cascade, but not the hepatic endotoxin response. Mol Med 2012; 18:1346-55. [PMID: 22952059 DOI: 10.2119/molmed.2012.00223] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2012] [Accepted: 08/28/2012] [Indexed: 12/16/2022] Open
Abstract
As significant differences between sexes were found in the susceptibility to alcoholic liver disease in human and animal models, it was the aim of the present study to investigate whether female mice also are more susceptible to the development of non-alcoholic fatty liver disease (NAFLD). Male and female C57BL/6J mice were fed either water or 30% fructose solution ad libitum for 16 wks. Liver damage was evaluated by histological scoring. Portal endotoxin levels and markers of Kupffer cell activation and insulin resistance, plasminogen activator inhibitor 1 (PAI-1) and phosphorylated adenosine monophosphate-activated protein kinase (pAMPK ) were measured in the liver. Adiponectin mRNA expression was determined in adipose tissue. Hepatic steatosis was almost similar between male and female mice; however, inflammation was markedly more pronounced in livers of female mice. Portal endotoxin levels, hepatic levels of myeloid differentiation primary response gene (88) (MyD88) protein and of 4-hydroxynonenal protein adducts were elevated in animals with NAFLD regardless of sex. Expression of insulin receptor substrate 1 and 2 was decreased to a similar extent in livers of male and female mice with NAFLD. The less pronounced susceptibility to liver damage in male mice was associated with a superinduction of hepatic pAMPK in these mice whereas, in livers of female mice with NAFLD, PAI-1 was markedly induced. Expression of adiponectin in visceral fat was significantly lower in female mice with NAFLD but unchanged in male mice compared with respective controls. In conclusion, our data suggest that the sex-specific differences in the susceptibility to NAFLD are associated with differences in the regulation of the adiponectin-AMPK-PAI-1 signaling cascade.
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Affiliation(s)
- Astrid Spruss
- Department of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
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Baffy G, Brunt EM, Caldwell SH. Hepatocellular carcinoma in non-alcoholic fatty liver disease: an emerging menace. J Hepatol 2012; 56:1384-91. [PMID: 22326465 DOI: 10.1016/j.jhep.2011.10.027] [Citation(s) in RCA: 625] [Impact Index Per Article: 52.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 10/17/2011] [Accepted: 10/18/2011] [Indexed: 02/07/2023]
Abstract
Hepatocellular carcinoma (HCC) is a common cancer worldwide that primarily develops in cirrhosis resulting from chronic infection by hepatitis B virus and hepatitis C virus, alcoholic injury, and to a lesser extent from genetically determined disorders such as hemochromatosis. HCC has recently been linked to non-alcoholic fatty liver disease (NAFLD), the hepatic manifestation of obesity and related metabolic disorders such as diabetes. This association is alarming due to the globally high prevalence of these conditions and may contribute to the rising incidence of HCC witnessed in many industrialized countries. There is also evidence that NAFLD acts synergistically with other risk factors of HCC such as chronic hepatitis C and alcoholic liver injury. Moreover, HCC may complicate non-cirrhotic NAFLD with mild or absent fibrosis, greatly expanding the population potentially at higher risk. Major systemic and liver-specific molecular mechanisms involved include insulin resistance and hyperinsulinemia, increased TNF signaling pathways, and alterations in cellular lipid metabolism. These provide new targets for prevention, early recognition, and effective treatment of HCC associated with NAFLD. Indeed, both metformin and PPAR gamma agonists have been associated with lower risk and improved prognosis of HCC. This review summarizes current evidence as it pertains to the epidemiology, pathogenesis, and prevention of NAFLD-associated HCC.
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Affiliation(s)
- György Baffy
- VA Boston Healthcare System and Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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Fujii H, Kawada N. Inflammation and fibrogenesis in steatohepatitis. J Gastroenterol 2012; 47:215-25. [PMID: 22310735 DOI: 10.1007/s00535-012-0527-x] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 01/05/2012] [Indexed: 02/04/2023]
Abstract
Nonalcoholic fatty liver disease consists of a range of disorders characterized by excess accumulation of triglyceride within the liver. Whereas simple steatosis is clinically benign, nonalcoholic steatohepatitis (NASH) often progresses to cirrhosis. Inflammation and fibrogenesis are closely inter-related and are major targets of NASH research. Experimental data have shown that inflammation in NASH is caused by insulin resistance, systemic lipotoxicity due to overnutrition, lipid metabolites, the production of proinflammatory cytokines and adipokines by visceral adipose tissue, gut-derived bacteria, and oxidative stress. In NASH-associated fibrosis, the principal cell type responsible for extracellular matrix production is recognized as the hepatic stellate cell. Although the fibrotic mechanisms underlying NASH are largely similar to those observed in other chronic liver diseases, the altered patterns of circulating adipokines, the generation of oxidative stress, and the hormonal profile associated with the metabolic syndrome might play unique roles in the fibrogenesis associated with the disease. Information on the basic pathogenesis of NASH with a focus on the generation of inflammation and fibrosis will be discussed.
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Affiliation(s)
- Hideki Fujii
- Department of Hepatology, Graduate School of Medicine, Osaka City University, 1-4-3, Asahimachi, Abeno-ku, Osaka 545-8585, Japan
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The association between adipocytokines and biomarkers for nonalcoholic fatty liver disease-induced liver injury: a study in the general population. Eur J Gastroenterol Hepatol 2012; 24:262-9. [PMID: 22246329 DOI: 10.1097/meg.0b013e32834f15dd] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIM Leptin and adiponectin have been implicated in the development of nonalcoholic fatty liver disease (NAFLD). However, the usefulness of adipocytokines as a screening tool for nonalcoholic steatohepatitis (NASH) and fibrosis could not be evaluated in the general population due to the invasive nature of liver biopsy. The aim was to evaluate the association between adipocytokines and presumed liver injury in the general population using noninvasive biomarkers. METHODS A cross-sectional study of 375 individuals, sampled from the National Health Survey was conducted. The exclusion criterion was any known secondary etiology for liver disease. Anthropometrics, serum leptin, adiponectin, insulin, lipids, and FibroMax were measured. RESULTS Three hundred and thirty-eight individuals met the inclusion criteria and had valid FibroMax. Fibrosis diagnosed by the FibroTest was found in 25.7% of the patients, of whom 12.8% had significant fibrosis. Steatohepatitis was diagnosed by the NASH test in 0.9% and borderline NASH in 31.4% of the patients. Adiponectin was an independent negative correlate of borderline NASH [odds ratio (OR): 0.92; 95% confidence interval (CI): 0.86-0.98/1 µg/ml] together with high-density lipoprotein, and leptin was a positive correlate (OR: 1.03; CI: 1.01-1.06/1 ng/ml), together with abdominal obesity, serum triglycerides, and HbA1C. The OR for borderline NASH was 20.7 (CI: 7.5-57.5) when both high leptin (upper quartile) and suboptimal adiponectin were present, adjusting for age and sex. The FibroTest was not associated with leptin and adiponectin. The strongest predictors for fibrosis were age, sex, abdominal obesity, and insulin. CONCLUSION Low adiponectin and high leptin and the combination of both have a strong independent association with presumed early-stage NASH. However, early-stage fibrosis cannot be predicted by these adipocytokines.
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Zibadi S, Cordova F, Slack EH, Watson RR, Larson DF. Leptin's regulation of obesity-induced cardiac extracellular matrix remodeling. Cardiovasc Toxicol 2012; 11:325-33. [PMID: 21744298 DOI: 10.1007/s12012-011-9124-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Obesity-induced remodeling of cardiac extracellular matrix (ECM) leads to myocardial fibrosis and ultimately diastolic dysfunction. Leptin, an adipocyte hormone, is emerging as a novel mechanistic link between obesity and heart diseases. Despite the known essential role of leptin in hepatic and renal fibrosis, the in vivo effects of leptin on cardiac ECM remodeling remain unclear. Our objective was to define the role of leptin as a key mediator of pro-fibrogenic responses in the heart. In vitro administration of leptin to primary cardiofibroblasts resulted in significant stimulation of pro-collagen Iα ( 1 ) and a decrease in pro-matrix metalloproteinase (MMP)-8, -9 and -13 gene expressions at 24 h. To study the in vivo pro-fibrotic effect, leptin was administrated to C57BL/6 and leptin-deficient ob/ob mice for 8 weeks. With exogenous leptin ob/ob mice displayed passive diastolic filling dysfunction, coincided with significant increase in myocardial collagen compared with ob/ob controls. We also observed a marked stimulation of pro-collagen IIIα ( 1 ) and suppression of pro-MMP-8, TIMP-1 and -3 gene expressions in leptin-treated ob/ob mice. Our findings suggest pro-fibrotic effects of leptin in the heart, primarily through the predominance of collagen synthesis over degradation.
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Affiliation(s)
- Sherma Zibadi
- Sarver Heart Center, College of Medicine, The University of Arizona, Tucson, USA
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Ye P, Yang B, Wu XL, Jiang MD. P38 MAPK signaling pathway: biological functions, roles in the pathogenesis of liver fibrosis and common research methods. Shijie Huaren Xiaohua Zazhi 2011; 19:3353-3358. [DOI: 10.11569/wcjd.v19.i32.3353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The activation and proliferation of hepatic stellate cells (HSC) are the key events in hepatic fibrogenesis. Now the research about the mechanisms of action of HSC-related signal transduction has become a hot topic. This article reviews the biological functions of the p38 MAPK signaling pathway and its roles in the pathogenesis of liver fibrosis and summarizes common research methods for this signaling pathway.
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Cohen-Naftaly M, Friedman SL. Current status of novel antifibrotic therapies in patients with chronic liver disease. Therap Adv Gastroenterol 2011; 4:391-417. [PMID: 22043231 PMCID: PMC3187682 DOI: 10.1177/1756283x11413002] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Fibrosis accumulation is a dynamic process resulting from a wound-healing response to acute or chronic liver injury of all causes. The cascade starts with hepatocyte necrosis and apoptosis, which instigate inflammatory signaling by chemokines and cytokines, recruitment of immune cell populations, and activation of fibrogenic cells, culminating in the deposition of extracellular matrix. These key elements, along with pathways of transcriptional and epigenetic regulation, represent fertile therapeutic targets. New therapies include drugs specifically designed as antifibrotics, as well as drugs already available with well-established safety profiles, whose mechanism of action may also be antifibrotic. At the same time, the development of noninvasive fibrogenic markers, and techniques (e.g. fibroscan), as well as combined scoring systems incorporating serum and clinical features will allow improved assessment of therapy response. In aggregate, the advances in the elucidation of the biology of fibrosis, combined with improved technologies for assessment will provide a comprehensive framework for design of antifibrotics and their analysis in well-designed clinical trials. These efforts may ultimately yield success in halting the progression of, or reversing, liver fibrosis.
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Affiliation(s)
| | - Scott L. Friedman
- Fishberg Professor of Medicine, Division of Liver Diseases, Box 1123, Mount Sinai School of Medicine, 1425 Madison Avenue, Room 11-70C, New York, NY 10029-6574, USA
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43
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Zhang ZB, Sun XQ, Qian F, Xue BY. Role of adiponectin in the pathogenesis and treatment of nonalcoholic fatty liver disease. Shijie Huaren Xiaohua Zazhi 2011; 19:2036-2042. [DOI: 10.11569/wcjd.v19.i19.2036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Adiponectin is an insulin-sensitizing adipokine possessing multiple beneficial effects on nonalcoholic fatty liver disease. This adipokine is secreted from adipocytes into the circulation as three oligomeric isoforms: trimer, hexamer and the high molecular weight (HMW) oligomeric complex. Adiponectin binds to its receptor to exert its effects on target organs. The hepato-protective activities of adiponectin have been demonstrated by many clinical and experimental studies. Decreased level of serum adiponectin represents an independent risk factor for (NAFLD and liver dysfunction in humans. In animals, elevation of circulating adiponectin by either pharmacological or genetic approaches leads to a significant alleviation of hepatomegaly, steatosis and necro-inflammation associated with various liver diseases. In adiponectin knockout mice, there is a pre-existing condition of hepatic steatosis and mitochondrial dysfunction, which might contribute to increased vulnerability of these mice to secondary liver injuries induced by obesity and other conditions. This review aims to summarize the recent advances in research of the structural, molecular and cellular mechanisms underlying the hepato-protective properties of adiponectin.
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44
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Sauvant P, Cansell M, Atgié C. Vitamin A and lipid metabolism: relationship between hepatic stellate cells (HSCs) and adipocytes. J Physiol Biochem 2011; 67:487-96. [PMID: 21626400 DOI: 10.1007/s13105-011-0101-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 05/11/2011] [Indexed: 12/23/2022]
Abstract
Vitamin A or retinol plays a major role in the regulation of cellular homeostasis. Retinyl palmitate remains the main chemical form of vitamin A storage and is mainly located in hepatic stellate cells (HSCs) in lipid droplets resembling those found in adipose cells. White adipose tissue (WAT), is essentially involved in the regulation of lipid metabolism, through its role in lipid storage, and might also be considered as a vitamin A storage and metabolism site. WAT contains all the intracellular equipment for vitamin A metabolism and signaling pathways which allows retinol to be metabolized into retinoic acid, known to control genomic expression in WAT. The description of molecular mechanisms involved in the activation of HSCs and the differentiation of preadipocytes reveal similar cellular and molecular mechanisms. Indeed HSCs and adipocytes share a common expression of key transcription factors like PPAR-γ and RXR known to influence perilipin expression, which play fundamental roles in lipid droplet metabolism. Both cells are also sources of important endocrine signaling secretions influencing the expression of these transcription factors. The morphological and functional characteristics of HSCs and adipocytes, including the metabolism of vitamin A and other lipids and their related signaling pathways, are summarized and compared in this review. We highlight the complexity of the interrelationship between lipids and vitamin A metabolism and the role of the complex communication existing between HSCs and WAT in diseases such as non-alcoholic fatty liver disease which is the hepatic manifestation of the metabolic syndrome.
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Affiliation(s)
- Patrick Sauvant
- UMR 5248 CBMN Chimie et Biologie des Membranes et des Nanoobjets, CNRS, Université de Bordeaux, Institut Polytechnique de Bordeaux, Allée Geoffroy de St Hilaire, Pessac, Bordeaux, France.
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45
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Hernandez-Gea V, Friedman SL. Pathogenesis of liver fibrosis. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2011; 6:425-56. [PMID: 21073339 DOI: 10.1146/annurev-pathol-011110-130246] [Citation(s) in RCA: 1280] [Impact Index Per Article: 98.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Liver fibrosis is a major cause of morbidity and mortality worldwide due to chronic viral hepatitis and, more recently, from fatty liver disease associated with obesity. Hepatic stellate cell activation represents a critical event in fibrosis because these cells become the primary source of extracellular matrix in liver upon injury. Use of cell-culture and animal models has expanded our understanding of the mechanisms underlying stellate cell activation and has shed new light on genetic regulation, the contribution of immune signaling, and the potential reversibility of the disease. As pathways of fibrogenesis are increasingly clarified, the key challenge will be translating new advances into the development of antifibrotic therapies for patients with chronic liver disease.
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46
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Lee UE, Friedman SL. Mechanisms of hepatic fibrogenesis. BEST PRACTICE & RESEARCH. CLINICAL GASTROENTEROLOGY 2011. [PMID: 21497738 DOI: 10.1016/j.bpg.2011.02.005.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 10/01/2022]
Abstract
Multiple etiologies of liver disease lead to liver fibrosis through integrated signaling networks that regulate the deposition of extracellular matrix. This cascade of responses drives the activation of hepatic stellate cells (HSCs) into a myofibroblast-like phenotype that is contractile, proliferative and fibrogenic. Collagen and other extracellular matrix (ECM) components are deposited as the liver generates a wound-healing response to encapsulate injury. Sustained fibrogenesis leads to cirrhosis, characterized by a distortion of the liver parenchyma and vascular architecture. Uncovering the intricate mechanisms that underlie liver fibrogenesis forms the basis for efforts to develop targeted therapies to reverse the fibrotic response and improve the outcomes of patients with chronic liver disease.
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Affiliation(s)
- Ursula E Lee
- Division of Liver Diseases, Mount Sinai School of Medicine, 1425 Madison Ave, Room 11-76, New York, NY 10029, USA.
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47
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Guri AJ, Bassaganya-Riera J. Systemic effects of white adipose tissue dysregulation and obesity-related inflammation. Obesity (Silver Spring) 2011; 19:689-700. [PMID: 20930712 DOI: 10.1038/oby.2010.230] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Amir J Guri
- Nutritional Immunology and Molecular Medicine Laboratory, CyberInfrastructure Division, Virginia Bioinformatics Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
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48
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Abstract
Multiple etiologies of liver disease lead to liver fibrosis through integrated signaling networks that regulate the deposition of extracellular matrix. This cascade of responses drives the activation of hepatic stellate cells (HSCs) into a myofibroblast-like phenotype that is contractile, proliferative and fibrogenic. Collagen and other extracellular matrix (ECM) components are deposited as the liver generates a wound-healing response to encapsulate injury. Sustained fibrogenesis leads to cirrhosis, characterized by a distortion of the liver parenchyma and vascular architecture. Uncovering the intricate mechanisms that underlie liver fibrogenesis forms the basis for efforts to develop targeted therapies to reverse the fibrotic response and improve the outcomes of patients with chronic liver disease.
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Affiliation(s)
- Ursula E Lee
- Division of Liver Diseases, Mount Sinai School of Medicine, 1425 Madison Ave, Room 11-76, New York, NY 10029, USA.
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49
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Abstract
Multiple etiologies of liver disease lead to liver fibrosis through integrated signaling networks that regulate the deposition of extracellular matrix. This cascade of responses drives the activation of hepatic stellate cells (HSCs) into a myofibroblast-like phenotype that is contractile, proliferative and fibrogenic. Collagen and other extracellular matrix (ECM) components are deposited as the liver generates a wound-healing response to encapsulate injury. Sustained fibrogenesis leads to cirrhosis, characterized by a distortion of the liver parenchyma and vascular architecture. Uncovering the intricate mechanisms that underlie liver fibrogenesis forms the basis for efforts to develop targeted therapies to reverse the fibrotic response and improve the outcomes of patients with chronic liver disease.
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Affiliation(s)
- Ursula E Lee
- Division of Liver Diseases, Mount Sinai School of Medicine, 1425 Madison Ave, Room 11-76, New York, NY 10029, USA.
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50
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Kim MH, Park JS, Jung JW, Byun KW, Kang KS, Lee YS. Daidzein supplementation prevents non-alcoholic fatty liver disease through alternation of hepatic gene expression profiles and adipocyte metabolism. Int J Obes (Lond) 2010; 35:1019-30. [PMID: 21157426 DOI: 10.1038/ijo.2010.256] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Globally, non-alcoholic fatty liver disease (NAFLD) continues to rise and isoflavones exert antisteatotic effects by the regulation of hepatic lipogenesis/insulin resistance or adiposity/a variety of adipocytokines are related to hepatic steatosis. However, there is very little information regarding the potential effects of daidzein, the secondary abundant isoflavone, on NAFLD. Here, we have assessed the hepatic global transcription profiles, adipocytokines and adiposity in mice with high fat-induced NAFLD and their alteration by daidzein supplementation. METHODS C57BL/6J mice were fed with normal fat (16% fat of total energy), high fat (HF; 36% fat of total energy) and HF supplemented with daidzein (0.1, 0.5, 1 and 2 g per kg diet) for 12 weeks. RESULTS Daidzein supplementation (≥ 0.5 g per kg diet) reduced hepatic lipid concentrations and alleviated hepatic steatosis. The hepatic microarray showed that daidzein supplementation (1 g per kg diet) downregulated carbohydrate responsive element binding protein, a determinant of de novo lipogenesis, its upstream gene liver X receptor β and its target genes encoding for lipogenic enzymes, thereby preventing hepatic steatosis and insulin resistance. These results were confirmed by lower insulin and blood glucose levels as well as homeostasis model assessment insulin resistance scores. In addition, daidzein supplementation inhibited adiposity by the upregulation of genes involved in fatty acid β-oxidation and the antiadipogeneis, and moreover augmented antisteatohepatitic leptin and adiponectin mRNA levels, whereas it reduced the mRNA or concentration of steatotic tumor necrosis factor α and ghrelin. CONCLUSIONS These findings show that daidzein might alleviate NAFLD through the direct regulation of hepatic de novo lipogenesis and insulin signaling, and the indirect control of adiposity and adipocytokines by the alteration of adipocyte metabolism.
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Affiliation(s)
- M-H Kim
- Department of Food and Nutrition, College of Human Ecology, Seoul National University, Seoul, Korea
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