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Takahashi Y, Seko Y, Yamaguchi K, Takeuchi K, Yano K, Kataoka S, Moriguchi M, Itoh Y. Gamma-glutamyl transferase predicts pemafibrate treatment response in non-alcoholic fatty liver disease. J Gastroenterol Hepatol 2023; 38:1743-1749. [PMID: 37221601 DOI: 10.1111/jgh.16222] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/05/2023] [Accepted: 05/06/2023] [Indexed: 05/25/2023]
Abstract
BACKGROUND AND AIM Pemafibrate, a selective peroxisome proliferator activated receptor α modulator, has been shown to improve liver function among nonalcoholic fatty liver disease (NAFLD) patients with dyslipidemia. The aim of this retrospective study is to identify predictors of pemafibrate efficacy in NAFLD patients. METHODS A total of 75 NAFLD patients with dyslipidemia who received pemafibrate twice per day for 48 weeks were enrolled in this study. We used the FibroScan-aspartate aminotransferase (FAST) score as a benchmark for treatment efficacy. RESULTS Median FAST score significantly decreased from 0.96 at baseline to 0.93 at week 48 (P < 0.001). Significant improvements in levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transferase (GGT), and triglycerides were also noted. The serum level of GGT at baseline was correlated with change in FAST score (r = -0.22, P = 0.049). Changes in AST, ALT, and GGT were positively correlated with change in FAST score (r = 0.71, r = 0.61, and r = 0.38). Multivariate analyses identified age and GGT level at baseline as significantly associated with improvement of FAST score by pemafibrate therapy (odds ratio 1.11, 1.02, respectively). Patients over 50 years of age and with a GGT of 90 IU/L or higher showed significantly greater improvement in the FAST score than other groups. CONCLUSIONS Pemafibrate improves the FAST score of NAFLD patients with complicating dyslipidemia, especially in older patients with high GGT level. GGT is useful as an indicator of optimal treatment choice for NAFLD patients with dyslipidemia.
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Affiliation(s)
- Yusuke Takahashi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuya Seko
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kanji Yamaguchi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kento Takeuchi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kota Yano
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Seita Kataoka
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Michihisa Moriguchi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Kasztelan-Szczerbinska B, Rycyk-Bojarzynska A, Szczerbinska A, Cichoz-Lach H. Selected Aspects of the Intricate Background of Immune-Related Cholangiopathies-A Critical Overview. Nutrients 2023; 15:760. [PMID: 36771465 PMCID: PMC9921714 DOI: 10.3390/nu15030760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
Primary biliary cholangitis (PBC), and primary sclerosing cholangitis (PSC) are rare immune-related cholangiopathies with still poorly explained pathogenesis. Although triggers of chronic inflammation with subsequent fibrosis that affect cholangiocytes leading to obliteration of bile ducts and conversion to liver cirrhosis are unclear, both disorders are regarded to be multifactorial. Different factors can contribute to the development of hepatocellular injury in the course of progressive cholestasis, including (1) body accumulation of bile acids and their toxicity, (2) decreased food intake and nutrient absorption, (3) gut microbiota transformation, and (4) reorganized host metabolism. Growing evidence suggests that intestinal microbiome composition not only can be altered by liver dysfunction, but in turn, it actively impacts hepatic conditions. In this review, we highlight the role of key factors such as the gut-liver axis, intestinal barrier integrity, bile acid synthesis and circulation, and microbiome composition, which seem to be strongly related to PBC and PSC outcome. Emerging treatments and future therapeutic strategies are also presented.
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Affiliation(s)
- Beata Kasztelan-Szczerbinska
- Department of Gastroenterology with Endoscopy Unit, Medical University of Lublin, 8 Jaczewski Street, 20-954 Lublin, Poland
| | - Anna Rycyk-Bojarzynska
- Department of Gastroenterology with Endoscopy Unit, Medical University of Lublin, 8 Jaczewski Street, 20-954 Lublin, Poland
| | | | - Halina Cichoz-Lach
- Department of Gastroenterology with Endoscopy Unit, Medical University of Lublin, 8 Jaczewski Street, 20-954 Lublin, Poland
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3
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Ye X, Zhang T, Han H. PPARα: A potential therapeutic target of cholestasis. Front Pharmacol 2022; 13:916866. [PMID: 35924060 PMCID: PMC9342652 DOI: 10.3389/fphar.2022.916866] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 06/29/2022] [Indexed: 12/12/2022] Open
Abstract
The accumulation of bile acids in the liver leads to the development of cholestasis and hepatocyte injury. Nuclear receptors control the synthesis and transport of bile acids in the liver. Among them, the farnesoid X receptor (FXR) is the most common receptor studied in treating cholestasis. The activation of this receptor can reduce the amount of bile acid synthesis and decrease the bile acid content in the liver, alleviating cholestasis. Ursodeoxycholic acid (UDCA) and obeticholic acid (OCA) have a FXR excitatory effect, but the unresponsiveness of some patients and the side effect of pruritus seriously affect the results of UDCA or OCA treatment. The activator of peroxisome proliferator-activated receptor alpha (PPARα) has emerged as a new target for controlling the synthesis and transport of bile acids during cholestasis. Moreover, the anti-inflammatory effect of PPARα can effectively reduce cholestatic liver injury, thereby improving patients’ physiological status. Here, we will focus on the function of PPARα and its involvement in the regulation of bile acid transport and metabolism. In addition, the anti-inflammatory effects of PPARα will be discussed in some detail. Finally, we will discuss the application of PPARα agonists for cholestatic liver disorders.
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Affiliation(s)
- Xiaoyin Ye
- School of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tong Zhang
- School of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Tong Zhang, ; Han Han,
| | - Han Han
- Experiment Center for Teaching and Learning, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Tong Zhang, ; Han Han,
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Mandorfer M, Simbrunner B. Prevention of First Decompensation in Advanced Chronic Liver Disease. Clin Liver Dis 2021; 25:291-310. [PMID: 33838851 DOI: 10.1016/j.cld.2021.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 10/20/2020] [Indexed: 01/31/2023]
Abstract
The first occurrence of decompensation constitutes a watershed moment in the natural history of chronic liver disease; it denotes a point of no return in a relevant proportion of patients. Preventive strategies may profoundly decrease cirrhosis-related morbidity and mortality. Removing the primary etiologic factor and cofactors, is key; however, a considerable proportion of patients require additional etiology-independent treatment strategies that target important pathomechanisms promoting decompensation (ie, portal hypertension and systemic inflammation). This article explains the importance of preventing first decompensation and summarizes the evidence for etiologic and etiology-independent (most important, nonselective beta-blockers and statins) therapies.
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Affiliation(s)
- Mattias Mandorfer
- Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria; Vienna Hepatic Hemodynamic Lab, Medical University of Vienna, Vienna, Austria.
| | - Benedikt Simbrunner
- Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria; Vienna Hepatic Hemodynamic Lab, Medical University of Vienna, Vienna, Austria
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5
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IL-13 as Target to Reduce Cholestasis and Dysbiosis in Abcb4 Knockout Mice. Cells 2020; 9:cells9091949. [PMID: 32846954 PMCID: PMC7564366 DOI: 10.3390/cells9091949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 01/13/2023] Open
Abstract
The Th2 cytokine IL-13 is involved in biliary epithelial injury and liver fibrosis in patients as well as in animal models. The aim of this study was to investigate IL-13 as a therapeutic target during short term and chronic intrahepatic cholestasis in an Abcb4-knockout mouse model (Abcb4-/-). Lack of IL-13 protected Abcb4-/- mice transiently from cholestasis. This decrease in serum bile acids was accompanied by an enhanced excretion of bile acids and a normalization of fecal bile acid composition. In Abcb4-/-/IL-13-/- double knockout mice, bacterial translocation to the liver was significantly reduced and the intestinal microbiome resembled the commensal composition in wild type animals. In addition, 52-week-old Abcb4-/-IL-13-/- mice showed significantly reduced hepatic fibrosis. Abcb4-/- mice devoid of IL-13 transiently improved cholestasis and converted the composition of the gut microbiota towards healthy conditions. This highlights IL-13 as a potential therapeutic target in biliary diseases.
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Trauner M. Effective medical treatments for PSC needed ASAP - is AESOP the answer? J Hepatol 2020; 73:12-14. [PMID: 32482353 DOI: 10.1016/j.jhep.2020.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 12/04/2022]
Affiliation(s)
- Michael Trauner
- Division of Gastroenterology and Hepatology, Dept. of Internal Medicine III, Medical University of Vienna, Vienna, Austria.
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7
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Emerging therapies in primary sclerosing cholangitis: pathophysiological basis and clinical opportunities. J Gastroenterol 2020; 55:588-614. [PMID: 32222826 PMCID: PMC7242240 DOI: 10.1007/s00535-020-01681-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 03/05/2020] [Indexed: 02/04/2023]
Abstract
Primary sclerosing cholangitis (PSC) is a progressive liver disease, histologically characterized by inflammation and fibrosis of the bile ducts, and clinically leading to multi-focal biliary strictures and with time cirrhosis and liver failure. Patients bear a significant risk of cholangiocarcinoma and colorectal cancer, and frequently have concomitant inflammatory bowel disease and autoimmune disease manifestations. To date, no medical therapy has proven significant impact on clinical outcomes and most patients ultimately need liver transplantation. Several treatment strategies have failed in the past and whilst prescription of ursodeoxycholic acid (UDCA) prevails, controversy regarding benefits remains. Lack of statistical power, slow and variable disease progression, lack of surrogate biomarkers for disease severity and other challenges in trial design serve as critical obstacles in the development of effective therapy. Advances in our understanding of PSC pathogenesis and biliary physiology over recent years has however led to a surge of clinical trials targeting various mechanistic compartments and currently raising hopes for imminent changes in patient management. Here, in light of pathophysiology, we outline and critically evaluate emerging treatment strategies in PSC, as tested in recent or ongoing phase II and III trials, stratified per a triad of targets of nuclear and membrane receptors regulating bile acid metabolism, immune modulators, and effects on the gut microbiome. Furthermore, we revisit the UDCA trials of the past and critically discuss relevant aspects of clinical trial design, including how the choice of endpoints, alkaline phosphatase in particular, may affect the future path to novel, effective PSC therapeutics.
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8
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Romano C, Esposito S, Ferrara R, Cuomo G. Choosing the most appropriate biologic therapy for Crohn’s disease according to concomitant extra-intestinal manifestations, comorbidities, or physiologic conditions. Expert Opin Biol Ther 2019; 20:49-62. [DOI: 10.1080/14712598.2020.1689953] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ciro Romano
- Division of Internal Medicine, Department of Medical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Sergio Esposito
- Division of Internal Medicine, Department of Medical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Roberta Ferrara
- Division of Internal Medicine, Department of Medical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Giovanna Cuomo
- Division of Internal Medicine, Department of Medical and Surgical Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
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Buisson EM, Jeong J, Kim HJ, Choi D. Regenerative Medicine of the Bile Duct: Beyond the Myth. Int J Stem Cells 2019; 12:183-194. [PMID: 31022996 PMCID: PMC6657949 DOI: 10.15283/ijsc18055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/31/2018] [Accepted: 09/03/2018] [Indexed: 12/12/2022] Open
Abstract
Cholangiopathies are rare diseases of the bile duct with high mortality rates. The current treatment for cholangiopathies is liver transplantation, but there are significant obstacles including a shortage of donors and a high risk of complications. Currently, there is only one available medicine on the market targeting cholangiopathies, and the results have been inadequate in clinical therapy. To overcome these obstacles, many researchers have used human induced pluripotent stem cells (hPSC) as a source for cholangiocyte-like cell generation and have incorporated advances in bioprinting to create artificial bile ducts for implantation and transplantation. This has allowed the field to move dramatically forward in studies of biliary regenerative medicine. In this review, the authors provide an overview of cholangiocytes, the organogenesis of the bile duct, cholangiopathies, and the current treatment and advances that have been made that are opening new doors to the study of cholangiopathies.
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Affiliation(s)
- Elina Maria Buisson
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea.,Department of Surgery, Hanyang University College of Medicine, Hanyang University, Seoul, Korea.,HY Indang Center of Regenerative Medicine and Stem Cell Research, Hanyang University, Hanyang University, Seoul, Korea
| | - Jaemin Jeong
- Department of Surgery, Hanyang University College of Medicine, Hanyang University, Seoul, Korea.,HY Indang Center of Regenerative Medicine and Stem Cell Research, Hanyang University, Hanyang University, Seoul, Korea
| | - Han Joon Kim
- Department of Surgery, Hanyang University College of Medicine, Hanyang University, Seoul, Korea
| | - Dongho Choi
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea.,Department of Surgery, Hanyang University College of Medicine, Hanyang University, Seoul, Korea.,HY Indang Center of Regenerative Medicine and Stem Cell Research, Hanyang University, Hanyang University, Seoul, Korea
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10
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Hirschfield GM, Chazouillères O, Drenth JP, Thorburn D, Harrison SA, Landis CS, Mayo MJ, Muir AJ, Trotter JF, Leeming DJ, Karsdal MA, Jaros MJ, Ling L, Kim KH, Rossi SJ, Somaratne RM, DePaoli AM, Beuers U. Effect of NGM282, an FGF19 analogue, in primary sclerosing cholangitis: A multicenter, randomized, double-blind, placebo-controlled phase II trial. J Hepatol 2019; 70:483-493. [PMID: 30414864 DOI: 10.1016/j.jhep.2018.10.035] [Citation(s) in RCA: 126] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/09/2018] [Accepted: 10/29/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Primary sclerosing cholangitis (PSC) is an inflammatory, cholestatic and progressively fibrotic liver disease devoid of effective medical intervention. NGM282, an engineered, non-tumorigenic FGF19 analogue, potently regulates CYP7A1-mediated bile acid homeostasis. We assessed the activity and safety of NGM282 in patients with PSC. METHODS In this double-blind, placebo-controlled phase II trial, 62 patients who had PSC confirmed by cholangiography or biopsy and an elevated alkaline phosphatase (ALP) >1.5 × the upper limit of normal were randomly assigned 1:1:1 to receive NGM282 1 mg, 3 mg or placebo once daily for 12 weeks. The primary outcome was the change in ALP from baseline to week 12. Secondary and exploratory outcomes included changes in serum biomarkers of bile acid metabolism and fibrosis. Efficacy analysis was by intention-to-treat. RESULTS At 12 weeks, there were no significant differences in the mean change from baseline in ALP between the NGM282 and placebo groups, and therefore, the primary endpoint was not met. However, NGM282 significantly reduced levels of 7alpha-hydroxy-4-cholesten-3-one (a marker of hepatic CYP7A1 activity, LS mean differences -6.2 ng/ml (95% CI -10.7 to -1.7; p = 0.008) and -9.4 ng/ml (-14.0 to -4.9; p <0.001) in the NGM282 1 mg and 3 mg groups, respectively, compared with placebo) and bile acids. Importantly, fibrosis biomarkers that predict transplant-free survival, including Enhanced Liver Fibrosis score and Pro-C3, were significantly improved following NGM282 treatment. Most adverse events were mild to moderate in severity, with gastrointestinal symptoms more frequent in the NGM282 treatment groups. CONCLUSIONS In patients with PSC, NGM282 potently inhibited bile acid synthesis and decreased fibrosis markers, without significantly affecting ALP levels. LAY SUMMARY We present for the first time, the clinical and laboratory effects of a first-in-class, engineered analogue of the endocrine hormone FGF19 in patients with primary sclerosing cholangitis (PSC). By incorporating non-invasive markers of fibrosis, beyond standard liver injury markers, we show that NGM282 impacted on fibrosis turnover and hepatic inflammation without changing alkaline phosphatase. Our findings demonstrate the complexities of using highly potent rational agents in PSC, and furthermore challenge the dogma about what the appropriate endpoints should be for trials in PSC.
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Affiliation(s)
- Gideon M Hirschfield
- National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, Birmingham, United Kingdom; University Hospitals Birmingham, Birmingham, United Kingdom; Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom; Toronto Centre for Liver Disease, University Health Network, University of Toronto, Toronto, Canada.
| | - Olivier Chazouillères
- Reference Center for Inflammatory Biliary Diseases and Autoimmune Hepatitis, Hepatology and Gastroenterology Department, Saint-Antoine University Hospital, Assistance Publique-Hopitaux de Paris, and INSERM UMR S938, Sorbonne University, Paris, France
| | - Joost P Drenth
- Department of Gastroenterology and Hepatology, Radboud UMC, Nijmegen, the Netherlands
| | - Douglas Thorburn
- Sheila Sherlock Liver Centre and UCL Institute of Liver and Digestive Health, Royal Free Hospital, London, United Kingdom
| | | | - Charles S Landis
- Division of Gastroenterology and Hepatology, University of Washington, Seattle, United States
| | - Marlyn J Mayo
- University Texas Southwestern Medical Center, Dallas, United States
| | - Andrew J Muir
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, United States
| | - James F Trotter
- Texas Digestive Disease Consultants, Clinical Research, Southlake, United States
| | | | | | | | - Lei Ling
- NGM Biopharmaceuticals, South San Francisco, United States
| | - Kathline H Kim
- NGM Biopharmaceuticals, South San Francisco, United States
| | | | | | - Alex M DePaoli
- NGM Biopharmaceuticals, South San Francisco, United States
| | - Ulrich Beuers
- Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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Ðanić M, Stanimirov B, Pavlović N, Goločorbin-Kon S, Al-Salami H, Stankov K, Mikov M. Pharmacological Applications of Bile Acids and Their Derivatives in the Treatment of Metabolic Syndrome. Front Pharmacol 2018; 9:1382. [PMID: 30559664 PMCID: PMC6287190 DOI: 10.3389/fphar.2018.01382] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 11/09/2018] [Indexed: 12/12/2022] Open
Abstract
Apart from well-known functions of bile acids in digestion and solubilization of lipophilic nutrients and drugs in the small intestine, the emerging evidence from the past two decades identified the role of bile acids as signaling, endocrine molecules that regulate the glucose, lipid, and energy metabolism through complex and intertwined pathways that are largely mediated by activation of nuclear receptor farnesoid X receptor (FXR) and cell surface G protein-coupled receptor 1, TGR5 (also known as GPBAR1). Interactions of bile acids with the gut microbiota that result in the altered composition of circulating and intestinal bile acids pool, gut microbiota composition and modified signaling pathways, are further extending the complexity of biological functions of these steroid derivatives. Thus, bile acids signaling pathways have become attractive targets for the treatment of various metabolic diseases and metabolic syndrome opening the new potential avenue in their treatment. In addition, there is a significant effort to unveil some specific properties of bile acids relevant to their intrinsic potency and selectivity for particular receptors and to design novel modulators of these receptors with improved pharmacokinetic and pharmacodynamic profiles. This resulted in synthesis of few semi-synthetic bile acids derivatives such as 6α-ethyl-chenodeoxycholic acid (obeticholic acid, OCA), norursodeoxycholic acid (norUDCA), and 12-monoketocholic acid (12-MKC) that are proven to have positive effect in metabolic and hepato-biliary disorders. This review presents an overview of the current knowledge related to bile acids implications in glucose, lipid and energy metabolism, as well as a potential application of bile acids in metabolic syndrome treatment with future perspectives.
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Affiliation(s)
- Maja Ðanić
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Bojan Stanimirov
- Department of Biochemistry, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Nebojša Pavlović
- Department of Pharmacy, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | | | - Hani Al-Salami
- Biotechnology and Drug Development Research Laboratory, School of Pharmacy and Biomedical Sciences, Biosciences Research Precinct, Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
| | - Karmen Stankov
- Department of Biochemistry, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Momir Mikov
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
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Ursodeoxycholate inhibits mast cell activation and reverses biliary injury and fibrosis in Mdr2 -/- mice and human primary sclerosing cholangitis. J Transl Med 2018; 98:1465-1477. [PMID: 30143751 PMCID: PMC6214746 DOI: 10.1038/s41374-018-0101-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 05/10/2018] [Accepted: 05/12/2018] [Indexed: 02/07/2023] Open
Abstract
Ursodeoxycholic acid (UDCA) is used to treat biliary disorders; and, bile acids alter mast cell (MC) histamine release. MCs infiltrate Mdr2-/- mice liver (model of primary sclerosing cholangitis (PSC)). MC-derived histamine increases inflammation, hepatic stellate cell (HSC) activation and fibrosis. The objective was to determine the effects of UDCA treatment on MC infiltration, biliary damage, inflammation and fibrosis in Mdr2-/- mice and human PSC. Wild-type and Mdr2-/- mice were fed bile acid control diet or UDCA (0.5% wt/wt). Human samples were collected from control and PSC patients treated with placebo or UDCA (15 mg/kg/BW). MC infiltration was measured by immunhistochemistry and quantitative polymerase chain reaction (qPCR) for c-Kit, chymase, and tryptase. The HDC/histamine/histamine receptor (HR)-axis was evaluated by EIA and qPCR. Intrahepatic bile duct mass (IBDM) and biliary proliferation was evaluated by CK-19 and Ki-67 staining. Fibrosis was detected by immunostaining and qPCR for fibrotic markers. Inflammatory components were measured by qPCR. HSC activation was measured by SYP-9 staining. Inflammation was detected by qPCR for CD68. In vitro, MCs were treated with UDCA (40 μM) prior to HA secretion evaluation and coculturing with cholangiocytes or HSCs. BrDU incorporation and fibrosis by qPCR was performed. UDCA reduced MC number, the HDC/histamine/HR-axis, IBDM, HSC activation, inflammation, and fibrosis in Mdr2-/- mice and PSC patients. In vitro, UDCA decreases MC-histamine release, which was restored by blocking ASBT and FXRβ. Proliferation and fibrosis decreased after treatment with UDCA-treated MCs. We conclude that UDCA acts on MCs reducing histamine levels and decreases the inflammatory/hyperplastic/fibrotic reaction seen in PSC. Ursodeoxycholic acid (UDCA) is used to treat biliary disorders; and, bile acids alter mast cell (MC) histamine release. Following liver injury like primary sclerosing cholangitis in mice and humans, MCs infiltrate. MC-derived histamine increases biliary damage, fibrosis, and inflammation. UDCA treatment decreases these parameters via reduced MC activation.
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NorUDCA promotes degradation of α1-antitrypsin mutant Z protein by inducing autophagy through AMPK/ULK1 pathway. PLoS One 2018; 13:e0200897. [PMID: 30067827 PMCID: PMC6070232 DOI: 10.1371/journal.pone.0200897] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 07/05/2018] [Indexed: 02/07/2023] Open
Abstract
Alpha-1 Antitrypsin (α1AT) Deficiency is a genetic disease in which accumulation of α1AT mutant Z (α1ATZ) protein in the ER of hepatocytes causes chronic liver injury, liver fibrosis, and hepatocellular carcinoma. No effective medical therapy is currently available for the disease. We previously found that norUDCA improves the α1AT deficiency associated liver disease by promoting autophagic degradation of α1ATZ protein in liver in a mouse model of the disease. The current study unravels the novel underlying cellular mechanism by which norUDCA modulates autophagy. HTOZ cells, modified from HeLa Tet-Off cells by transfection with the resulting pTRE1-ATZ plasmid and expressing mutant Z proteins, were studied in these experiments. The role of norUDCA in inducing autophagy, autophagy-mediated degradation of α1ATZ and the role of AMPK in norUDCA-induced autophagy were examined in the current report. NorUDCA promoted disposal of α1ATZ via autophagy-mediated degradation of α1ATZ in HTOZ cells. Activation of AMPK was required for norUDCA-induced autophagy and α1ATZ degradation. Moreover, mTOR/ULK1 was involved in norUDCA-induced AMPK activation and autophagy in HTOZ cells. Our results provide novel mechanistic insights into the therapeutic action of norUDCA in promoting the clearance of α1ATZ in vitro and suggest a novel therapeutic approach for the treatment of α1ATZ deficiency disease and its associated liver diseases.
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14
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Kalani A, Tabibian JH, Lindor KD. Emerging therapeutic targets for primary sclerosing cholangitis. Expert Opin Orphan Drugs 2018. [DOI: 10.1080/21678707.2018.1490643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Amir Kalani
- Vatche and Tamar Manoukian Division of Digestive Diseases, UCLA Gastroenterology Fellowship Training Program, Los Angeles, CA, USA
| | - James H. Tabibian
- Division of Gastroenterology, Department of Medicine, Olive View-UCLA Medical Center, Sylmar, CA, USA
| | - Keith D. Lindor
- Professor of Medicine and Senior Advisor to the Provost, College of Health Solutions, Arizona State University, USA
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Hintermann E, Bayer M, Conti CB, Fuchs S, Fausther M, Leung PS, Aurrand-Lions M, Taubert R, Pfeilschifter JM, Friedrich-Rust M, Schuppan D, Dranoff JA, Gershwin ME, Manns MP, Imhof BA, Christen U. Junctional adhesion molecules JAM-B and JAM-C promote autoimmune-mediated liver fibrosis in mice. J Autoimmun 2018; 91:83-96. [PMID: 29753567 DOI: 10.1016/j.jaut.2018.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/26/2018] [Accepted: 05/02/2018] [Indexed: 12/17/2022]
Abstract
Fibrosis remains a serious health concern in patients with chronic liver disease. We recently reported that chemically induced chronic murine liver injury triggers increased expression of junctional adhesion molecules (JAMs) JAM-B and JAM-C by endothelial cells and de novo synthesis of JAM-C by hepatic stellate cells (HSCs). Here, we demonstrate that biopsies of patients suffering from primary biliary cholangitis (PBC), primary sclerosing cholangitis (PSC) or autoimmune hepatitis (AIH) display elevated levels of JAM-C on portal fibroblasts (PFs), HSCs, endothelial cells and cholangiocytes, whereas smooth muscle cells expressed JAM-C constitutively. Therefore, localization and function of JAM-B and JAM-C were investigated in three mouse models of autoimmune-driven liver inflammation. A PBC-like disease was induced by immunization with 2-octynoic acid-BSA conjugate, which resulted in the upregulation of both JAMs in fibrotic portal triads. Analysis of a murine model of PSC revealed a role of JAM-C in PF cell-cell adhesion and contractility. In mice suffering from AIH, endothelial cells increased JAM-B level and HSCs and capsular fibroblasts became JAM-C-positive. Most importantly, AIH-mediated liver fibrosis was reduced in JAM-B-/- mice or when JAM-C was blocked by soluble recombinant JAM-C. Interestingly, loss of JAM-B/JAM-C function had no effect on leukocyte infiltration, suggesting that the well-documented function of JAMs in leukocyte recruitment to inflamed tissue was not effective in the tested chronic models. This might be different in patients and may even be complicated by the fact that human leukocytes express JAM-C. Our findings delineate JAM-C as a mediator of myofibroblast-operated contraction of the liver capsule, intrahepatic vasoconstriction and bile duct stricture. Due to its potential to interact heterophilically with endothelial JAM-B, JAM-C supports also HSC/PF mural cell function. Together, these properties allow JAM-B and JAM-C to actively participate in vascular remodeling associated with liver/biliary fibrosis and suggest them as valuable targets for anti-fibrosis therapies.
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Affiliation(s)
- Edith Hintermann
- Pharmazentrum Frankfurt, ZAFES, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Monika Bayer
- Pharmazentrum Frankfurt, ZAFES, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Clara Benedetta Conti
- Department of Internal Medicine 1, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany; Fondazione IRCCS Cà, Granda Ospedale Maggiore Policlinico, Department of Pathophysiology and Organ Transplantation, Milan, Italy.
| | - Sina Fuchs
- Pharmazentrum Frankfurt, ZAFES, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Michel Fausther
- Division of Gastroenterology and Hepatology, University of Arkansas, Little Rock, AR, USA.
| | - Patrick S Leung
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, Davis, CA, USA.
| | - Michel Aurrand-Lions
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille, France.
| | - Richard Taubert
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.
| | - Josef M Pfeilschifter
- Pharmazentrum Frankfurt, ZAFES, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Mireen Friedrich-Rust
- Department of Internal Medicine 1, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Detlef Schuppan
- Institute of Translational Immunology and Research Center for Immune Therapy, University Medical Center, Johannes Gutenberg University, Mainz, Germany.
| | - Jonathan A Dranoff
- Division of Gastroenterology and Hepatology, University of Arkansas, Little Rock, AR, USA.
| | - M Eric Gershwin
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, Davis, CA, USA.
| | - Michael P Manns
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.
| | - Beat A Imhof
- Department of Pathology and Immunology, Centre Médical Universitaire, University of Geneva, Geneva, Switzerland.
| | - Urs Christen
- Pharmazentrum Frankfurt, ZAFES, Goethe University Hospital Frankfurt, Frankfurt am Main, Germany.
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16
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Damman JL, Rodriguez EA, Ali AH, Buness CW, Cox KL, Carey EJ, Lindor KD. Review article: the evidence that vancomycin is a therapeutic option for primary sclerosing cholangitis. Aliment Pharmacol Ther 2018; 47:886-895. [PMID: 29411404 DOI: 10.1111/apt.14540] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 11/06/2017] [Accepted: 01/08/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS PSC is an autoimmune biliary inflammatory disorder that is often associated with inflammatory bowel disease (IBD), with 50%-75% of patients with PSC having coexisting IBD, most commonly ulcerative colitis. Currently, no medical therapies have been shown to improve the disease course or slow its progression. However, ongoing research has resulted in a growing interest in the use of antibiotics for treatment of PSC, of which vancomycin is the most studied. In this review, we summarise the current evidence on the use of vancomycin in PSC and comment on future research areas of interest. METHODS A comprehensive PUBMED and EMBASE literature search for articles on vancomycin, PSC, therapeutic options and microbiome was performed. RESULTS Two randomised clinical trials, three case series and two case reports were included in the study. These include uncontrolled data from at least 98 patients that include promising improvements in biochemistry and imaging. Optimal dosing regimens are unclear. CONCLUSION Vancomycin is one of the most studied antibiotics used in the treatment of PSC with promising results. There is not currently sufficient evidence to support treatment recommendations. Further research is needed to establish if vancomycin is a PSC treatment.
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Affiliation(s)
- J L Damman
- Pediatrics/Gastroenterology and Hepatology, Stanford University, Stanford, CA, USA
| | - E A Rodriguez
- Gastroenterology and Hepatology, Mayo Clinic, Arizona, USA
| | - A H Ali
- Hepatology, Mayo Clinic, Arizona, USA
| | - C W Buness
- National Patient Advocate Foundation, Paradise Valley, AZ, USA
| | - K L Cox
- Pediatric Gastroenterology and Hepatology, Stanford University, Stanford, CA, USA
| | - E J Carey
- Gastroenterology and Hepatology, Mayo Clinic, Arizona, USA
| | - K D Lindor
- Gastroenterology and Hepatology, Arizona State University and Mayo Clinic, Arizona, USA
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17
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Argollo M, Fiorino G, Peyrin-Biroulet L, Danese S. Vedolizumab for the treatment of Crohn’s disease. Expert Rev Clin Immunol 2018; 14:179-189. [DOI: 10.1080/1744666x.2018.1438189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Marjorie Argollo
- Department of Gastroenterology, Universidade Federal de São Paulo - UNIFESP, São Paulo, Brazil
- IBD Center, Department of Gastroenterology, Humanitas Research Hospital, Milan, Italy
| | - Gionata Fiorino
- IBD Center, Department of Gastroenterology, Humanitas Research Hospital, Milan, Italy
| | - Laurent Peyrin-Biroulet
- Department of Gastroenterology and Inserm U954, Nancy University Hospital, Lorraine University, Vandoeuvre, France
| | - Silvio Danese
- IBD Center, Department of Gastroenterology, Humanitas Research Hospital, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
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18
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Christen U, Hintermann E. Autoantibodies in Autoimmune Hepatitis: Can Epitopes Tell Us about the Etiology of the Disease? Front Immunol 2018; 9:163. [PMID: 29503645 PMCID: PMC5820307 DOI: 10.3389/fimmu.2018.00163] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/18/2018] [Indexed: 12/12/2022] Open
Abstract
Autoimmune hepatitis (AIH), primary biliary cholangitis (PBC), and primary sclerosing cholangitis (PSC) are serious autoimmune liver diseases that are characterized by a progressive destruction of the liver parenchyma and/or the hepatic bile ducts and the development of chronic fibrosis. Left untreated autoimmune liver diseases are often life-threatening, and patients require a liver transplantation to survive. Thus, an early and reliable diagnosis is paramount for the initiation of a proper therapy with immunosuppressive and/or anticholelithic drugs. Besides the analysis of liver biopsies and serum markers indicating liver damage, the screening for specific autoantibodies is an indispensable tool for the diagnosis of autoimmune liver diseases. Such liver autoantigen-specific antibodies might be involved in the disease pathogenesis, and their epitope specificity may give some insight into the etiology of the disease. Here, we will mainly focus on the generation and specificity of autoantibodies in AIH patients. In addition, we will review data from animal models that aim toward a better understanding of the origins and pathogenicity of such autoantibodies.
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Affiliation(s)
- Urs Christen
- Pharmazentrum Frankfurt/ZAFES, Goethe University Hospital, Frankfurt am Main, Germany
| | - Edith Hintermann
- Pharmazentrum Frankfurt/ZAFES, Goethe University Hospital, Frankfurt am Main, Germany
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19
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Czaja AJ. Review article: next-generation transformative advances in the pathogenesis and management of autoimmune hepatitis. Aliment Pharmacol Ther 2017; 46:920-937. [PMID: 28901565 DOI: 10.1111/apt.14324] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/01/2017] [Accepted: 08/25/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Advances in autoimmune hepatitis that transform current concepts of pathogenesis and management can be anticipated as products of ongoing investigations driven by unmet clinical needs and an evolving biotechnology. AIM To describe the advances that are likely to become transformative in autoimmune hepatitis, based on the direction of current investigations. METHODS Pertinent abstracts were identified in PubMed by multiple search terms. Full-length articles were selected for review, and a secondary bibliography was developed. The discovery process was repeated, and a tertiary bibliography was identified. The number of abstracts reviewed was 2830, and the number of full-length articles reviewed exceeded 150. RESULTS Risk-laden allelic variants outside the major histocompatibility complex (rs3184504, r36000782) are being identified by genome-wide association studies, and their gene products are potential therapeutic targets. Epigenetic changes associated with environmental cues can enhance the transcriptional activity of genes, and chromatin re-structuring and antagonists of noncoding molecules of ribonucleic acid are feasible interventions. The intestinal microbiome is a discovery field for microbial products and activated immune cells that may translocate to the periphery and respond to manipulation. Epidemiological studies and controlled interview-based surveys may implicate environmental and xenobiotic factors that warrant evidence-based changes in lifestyle, and site-directed molecular and cellular interventions promise to change the paradigm of treatment from one of blanket immunosuppression. CONCLUSIONS Advances in genetics, epigenetics, pathophysiology, epidemiology, and site-directed molecular and cellular interventions constitute the next generation of transformative advances in autoimmune hepatitis.
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Affiliation(s)
- A J Czaja
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, MN, USA
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20
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Jarido V, Kennedy L, Hargrove L, Demieville J, Thomson J, Stephenson K, Francis H. The emerging role of mast cells in liver disease. Am J Physiol Gastrointest Liver Physiol 2017; 313:G89-G101. [PMID: 28473331 PMCID: PMC5582878 DOI: 10.1152/ajpgi.00333.2016] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 04/12/2017] [Accepted: 04/24/2017] [Indexed: 01/31/2023]
Abstract
The depth of our knowledge regarding mast cells has widened exponentially in the last 20 years. Once thought to be only important for allergy-mediated events, mast cells are now recognized to be important regulators of a number of pathological processes. The revelation that mast cells can influence organs, tissues, and cells has increased interest in mast cell research during liver disease. The purpose of this review is to refresh the reader's knowledge of the development, type, and location of mast cells and to review recent work that demonstrates the role of hepatic mast cells during diseased states. This review focuses primarily on liver diseases and mast cells during autoimmune disease, hepatitis, fatty liver disease, liver cancer, and aging in the liver. Overall, these studies demonstrate the potential role of mast cells in disease progression.
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Affiliation(s)
- Veronica Jarido
- Baylor Scott & White Health and Medicine, Temple, Texas; and
| | - Lindsey Kennedy
- Research, Central Texas Veterans Health Care System, Temple, Texas
- Texas A & M Health Science Center, Temple, Texas
| | | | | | - Joanne Thomson
- Research, Central Texas Veterans Health Care System, Temple, Texas
| | | | - Heather Francis
- Research, Central Texas Veterans Health Care System, Temple, Texas;
- Baylor Scott & White Health and Medicine, Temple, Texas; and
- Texas A & M Health Science Center, Temple, Texas
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21
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Bajer L, Kverka M, Kostovcik M, Macinga P, Dvorak J, Stehlikova Z, Brezina J, Wohl P, Spicak J, Drastich P. Distinct gut microbiota profiles in patients with primary sclerosing cholangitis and ulcerative colitis. World J Gastroenterol 2017; 23:4548-4558. [PMID: 28740343 PMCID: PMC5504370 DOI: 10.3748/wjg.v23.i25.4548] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 04/10/2017] [Accepted: 06/01/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To characterize the gut bacterial microbiota of patients with primary sclerosing cholangitis (PSC) and ulcerative colitis (UC).
METHODS Stool samples were collected and relevant clinical data obtained from 106 study participants, 43 PSC patients with (n = 32) or without (n = 11) concomitant inflammatory bowel disease, 32 UC patients, and 31 healthy controls. The V3 and V4 regions of the 16S ribosomal RNA gene were sequenced on Illumina MiSeq platform to cover low taxonomic levels. Data were further processed in QIIME employing MaAsLin and LEfSe tools for analysis of the output data.
RESULTS Microbial profiles in both PSC and UC were characterized by low bacterial diversity and significant change in global microbial composition. Rothia, Enterococcus, Streptococcus, Veillonella, and three other genera were markedly overrepresented in PSC regardless of concomitant inflammatory bowel disease (IBD). Rothia, Veillonella and Streptococcus were tracked to the species level to identify Rothia mucilaginosa, Streptococcus infantus, S. alactolyticus, and S. equi along with Veillonella parvula and V. dispar. PSC was further characterized by decreased abundance of Adlercreutzia equolifaciens and Prevotella copri. Decrease in genus Phascolarctobacterium was linked to presence of colonic inflammation regardless of IBD phenotype. Akkermansia muciniphila, Butyricicoccus pullicaecorum and Clostridium colinum were decreased in UC along with genus Roseburia. Low levels of serum albumin were significantly correlated with enrichment of order Actinomycetales.
CONCLUSION PSC is associated with specific gut microbes independently of concomitant IBD and several bacterial taxa clearly distinguish IBD phenotypes (PSC-IBD and UC).
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22
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Sofia MA, Rubin DT. The Impact of Therapeutic Antibodies on the Management of Digestive Diseases: History, Current Practice, and Future Directions. Dig Dis Sci 2017; 62:833-842. [PMID: 28197743 DOI: 10.1007/s10620-017-4479-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of therapeutic antibodies represents a revolutionary change in medical therapy for digestive diseases. Beginning with the initial studies that confirmed the pathogenicity of cytokines in inflammatory bowel disease, the development and application of therapeutic antibodies brought challenges and insights into their potential and optimal use. Infliximab was the first biological drug approved for use in Crohn's disease and ulcerative colitis. The lessons learned from infliximab include the importance of immunogenicity and the influence of pharmacokinetics on disease response and outcomes. Building on this foundation, other therapeutic antibodies achieved approval for inflammatory bowel disease and many more are in development for several digestive diseases. In this review, we reflect on the history of therapeutic antibodies and discuss current practice and future directions for the field.
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Affiliation(s)
- M Anthony Sofia
- Inflammatory Bowel Disease Center, University of Chicago Medicine, 5841 South Maryland Avenue, MC 4076, Chicago, IL, 60637, USA.
| | - David T Rubin
- Inflammatory Bowel Disease Center, University of Chicago Medicine, 5841 South Maryland Avenue, MC 4076, Chicago, IL, 60637, USA
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23
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Abstract
Despite decades of basic research, biliary diseases remain prevalent, highly morbid, and notoriously difficult to treat. We have, however, dramatically increased our understanding of biliary developmental biology, cholangiocyte pathophysiology, and the endogenous mechanisms of biliary regeneration and repair. All of this complex and rapidly evolving knowledge coincides with an explosion of new technological advances in the area of regenerative medicine. New breakthroughs such as induced pluripotent stem cells and organoid culture are increasingly being applied to the biliary system; it is only a matter of time until new regenerative therapeutics for the cholangiopathies are unveiled. In this review, the authors integrate what is known about biliary development, regeneration, and repair, and link these conceptual advances to the technological breakthroughs that are collectively driving the emergence of a new global field in biliary regenerative medicine.
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Affiliation(s)
- Thiago M. De Assuncao
- Division of Gastroenterology and Hepatology, Mayo Clinic and Foundation, Rochester, MN,Gastroenterology Research Unit, Mayo Clinic and Foundation, Rochester, MN
| | - Nidhi Jalan-Sakrikar
- Division of Gastroenterology and Hepatology, Mayo Clinic and Foundation, Rochester, MN,Gastroenterology Research Unit, Mayo Clinic and Foundation, Rochester, MN
| | - Robert C. Huebert
- Division of Gastroenterology and Hepatology, Mayo Clinic and Foundation, Rochester, MN,Gastroenterology Research Unit, Mayo Clinic and Foundation, Rochester, MN,Center for Cell Signaling in Gastroenterology; Mayo Clinic and Foundation, Rochester, MN
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24
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Hedgehog Signaling Overcomes an EZH2-Dependent Epigenetic Barrier to Promote Cholangiocyte Expansion. PLoS One 2016; 11:e0168266. [PMID: 27936185 PMCID: PMC5148157 DOI: 10.1371/journal.pone.0168266] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/29/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND & AIMS Developmental morphogens play an important role in coordinating the ductular reaction and portal fibrosis occurring in the setting of cholangiopathies. However, little is known about how membrane signaling events in ductular reactive cells (DRCs) are transduced into nuclear transcriptional changes to drive cholangiocyte maturation and matrix deposition. Therefore, the aim of this study was to investigate potential mechanistic links between cell signaling events and epigenetic regulators in DRCs. METHODS Using directed differentiation of induced pluripotent stem cells (iPSC), isolated DRCs, and in vivo models, we examine the mechanisms whereby sonic hedgehog (Shh) overcomes an epigenetic barrier in biliary precursors and promotes both cholangiocyte maturation and deposition of fibronectin (FN). RESULTS We demonstrate, for the first time, that Gli1 influences the differentiation state and fibrogenic capacity of iPSC-derived hepatic progenitors and isolated DRCs. We outline a novel pathway wherein Shh-mediated Gli1 binding in key cholangiocyte gene promoters overcomes an epigenetic barrier conferred by the polycomb protein, enhancer of zeste homolog 2 (EZH2) and initiates the transcriptional program of cholangiocyte maturation. We also define previously unknown functional Gli1 binding sites in the promoters of cytokeratin (CK)7, CK19, and FN. Our in vivo results show that EZH2 KO mice fed the choline-deficient, ethanolamine supplemented (CDE) diet have an exaggerated cholangiocyte expansion associated with more robust ductular reaction and increased peri-portal fibrosis. CONCLUSION We conclude that Shh/Gli1 signaling plays an integral role in cholangiocyte maturation in vitro by overcoming an EZH2-dependent epigenetic barrier and this mechanism also promotes biliary expansion in vivo.
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25
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Abstract
Hepatic fibrosis develops or progresses in 25 % of patients with autoimmune hepatitis despite corticosteroid therapy. Current management regimens lack reliable noninvasive methods to assess changes in hepatic fibrosis and interventions that disrupt fibrotic pathways. The goals of this review are to indicate promising noninvasive methods to monitor hepatic fibrosis in autoimmune hepatitis and identify anti-fibrotic interventions that warrant evaluation. Laboratory methods can differentiate cirrhosis from non-cirrhosis, but their accuracy in distinguishing changes in histological stage is uncertain. Radiological methods include transient elastography, acoustic radiation force impulse imaging, and magnetic resonance elastography. Methods based on ultrasonography are comparable in detecting advanced fibrosis and cirrhosis, but their performances may be compromised by hepatic inflammation and obesity. Magnetic resonance elastography has excellent performance parameters for all histological stages in diverse liver diseases, is uninfluenced by inflammatory activity or body habitus, has been superior to other radiological methods in nonalcoholic fatty liver disease, and may emerge as the preferred instrument to evaluate fibrosis in autoimmune hepatitis. Promising anti-fibrotic interventions are site- and organelle-specific agents, especially inhibitors of nicotinamide adenine dinucleotide phosphate oxidases, transforming growth factor beta, inducible nitric oxide synthase, lysyl oxidases, and C-C chemokine receptors types 2 and 5. Autoimmune hepatitis has a pro-fibrotic propensity, and noninvasive radiological methods, especially magnetic resonance elastography, and site- and organelle-specific interventions, especially selective antioxidants and inhibitors of collagen cross-linkage, may emerge to strengthen current management strategies.
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26
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Halilbasic E, Fuchs C, Traussnigg S, Trauner M. Farnesoid X Receptor Agonists and Other Bile Acid Signaling Strategies for Treatment of Liver Disease. Dig Dis 2016; 34:580-8. [PMID: 27332721 DOI: 10.1159/000445268] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The intracellular nuclear receptor farnesoid X receptor (FXR) and the transmembrane G protein-coupled receptor 5 (TGR5) respond to bile acids (BAs) by activating transcriptional networks and/or signaling cascades. These cascades affect the expression of a great number of target genes relevant for BA, cholesterol, lipid and carbohydrate metabolism, as well as genes involved in inflammation, fibrosis and carcinogenesis. FXR activation in the liver tissue and beyond, such as the gut-liver axis, kidney and adipose tissue, plays a role in metabolic diseases. These BA receptors activators hold promise to become a new class of drugs to be used in the treatment of chronic liver disease, hepatocellular cancer and extrahepatic inflammatory and metabolic diseases. This review discusses the relevant BA receptors, the new drugs that target BA transport and signaling and their possible applications.
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Affiliation(s)
- Emina Halilbasic
- Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
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27
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Abstract
A variety of diseases are included under the umbrella term ‘cholangitis’, including hepatobiliary diseases with an autoimmune pathogenesis (such as primary sclerosing cholangitis, primary biliary cholangitis, and IgG4-associated sclerosing cholangitis) and disease processes associated with intraductal stones and infectious etiologies (such as ascending bacterial cholangitis, recurrent pyogenic cholangitis, and liver fluke-associated cholangitis). Recent advances in the pathophysiologic bases of these disorders, particularly with respect to the autoimmune variety, are allowing improved diagnosis and prognostication as well as providing the opportunity to refine and re-imagine treatment modalities. The aim of this review is to highlight selected advances in cholangitis research that point to novel insights into the pathophysiology, diagnosis, and treatment of this diverse array of disorders.
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Affiliation(s)
- Sum P Lee
- Department of Medicine, Division of Gastroenterology , University of Washington School of Medicine, Seattle, WA, USA
| | - Joseph R Roberts
- Department of Medicine, Division of Gastroenterology , University of Washington School of Medicine, Seattle, WA, USA
| | - Rahul Kuver
- Department of Medicine, Division of Gastroenterology , University of Washington School of Medicine, Seattle, WA, USA
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