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Ren Y, Ciwang R, Mehmood K, Li K. Effects of forages on the microbiota of crossed sheep on cold Plateau. Anim Biotechnol 2024; 35:2362639. [PMID: 38856695 DOI: 10.1080/10495398.2024.2362639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Diet is an important component to influence microbiota, there are less data available about the microbiome of Suffolk cross with Tibetan (SCT) animals with different fodders. The current study was conducted for comparing the fungi microbiota in SCT sheep fed with different forages. Sequencing of ileum samples from sheep groups of AH (alfalfa and oat grass), BH (mixture of grass and concentrated feeds), CH (concentrated feed I), DH (concentrated feed II) and EH (concentrated feed III) achieved 3,171,271 raw and 2,719,649 filtered sequences. Concentrated feeds changed fungi microbiota in SCT sheep with three phyla and 47 genera significantly different among the groups. Genera include positive genus of Scytalidium and negative fungi of Sarocladium, Kazachstania, Gibberella, Scytalidium, Candida, Wickerhamomyces. The findings of our study will contribute to efficient feeding of SCT sheep at cold plateau areas.
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Affiliation(s)
- Yue Ren
- Institute of Livestock Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, PR China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa, PR China
| | - Renzeng Ciwang
- Institute of Livestock Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, PR China
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa, PR China
| | - Khalid Mehmood
- Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Kun Li
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, PR China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, PR China
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2
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Warren A, Nyavor Y, Beguelin A, Frame LA. Dangers of the chronic stress response in the context of the microbiota-gut-immune-brain axis and mental health: a narrative review. Front Immunol 2024; 15:1365871. [PMID: 38756771 PMCID: PMC11096445 DOI: 10.3389/fimmu.2024.1365871] [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: 01/05/2024] [Accepted: 04/22/2024] [Indexed: 05/18/2024] Open
Abstract
More than 20% of American adults live with a mental disorder, many of whom are treatment resistant or continue to experience symptoms. Other approaches are needed to improve mental health care, including prevention. The role of the microbiome has emerged as a central tenet in mental and physical health and their interconnectedness (well-being). Under normal conditions, a healthy microbiome promotes homeostasis within the host by maintaining intestinal and brain barrier integrity, thereby facilitating host well-being. Owing to the multidirectional crosstalk between the microbiome and neuro-endocrine-immune systems, dysbiosis within the microbiome is a main driver of immune-mediated systemic and neural inflammation that can promote disease progression and is detrimental to well-being broadly and mental health in particular. In predisposed individuals, immune dysregulation can shift to autoimmunity, especially in the presence of physical or psychological triggers. The chronic stress response involves the immune system, which is intimately involved with the gut microbiome, particularly in the process of immune education. This interconnection forms the microbiota-gut-immune-brain axis and promotes mental health or disorders. In this brief review, we aim to highlight the relationships between stress, mental health, and the gut microbiome, along with the ways in which dysbiosis and a dysregulated immune system can shift to an autoimmune response with concomitant neuropsychological consequences in the context of the microbiota-gut-immune-brain axis. Finally, we aim to review evidenced-based prevention strategies and potential therapeutic targets.
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Affiliation(s)
- Alison Warren
- The Frame-Corr Laboratory, Department of Clinical Research and Leadership, The George Washington University School of Medicine and Health Sciences, Washington, DC, United States
| | - Yvonne Nyavor
- Department of Biotechnology, Harrisburg University of Science and Technology, Harrisburg, PA, United States
| | - Aaron Beguelin
- The Department of Biotechnology, Johns Hopkins University, Baltimore, MD, United States
| | - Leigh A. Frame
- The Frame-Corr Laboratory, Department of Clinical Research and Leadership, The George Washington University School of Medicine and Health Sciences, Washington, DC, United States
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3
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Raya Tonetti F, Eguileor A, Mrdjen M, Pathak V, Travers J, Nagy LE, Llorente C. Gut-liver axis: Recent concepts in pathophysiology in alcohol-associated liver disease. Hepatology 2024:01515467-990000000-00873. [PMID: 38691396 DOI: 10.1097/hep.0000000000000924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 04/20/2024] [Indexed: 05/03/2024]
Abstract
The growing recognition of the role of the gut microbiome's impact on alcohol-associated diseases, especially in alcohol-associated liver disease, emphasizes the need to understand molecular mechanisms involved in governing organ-organ communication to identify novel avenues to combat alcohol-associated diseases. The gut-liver axis refers to the bidirectional communication and interaction between the gut and the liver. Intestinal microbiota plays a pivotal role in maintaining homeostasis within the gut-liver axis, and this axis plays a significant role in alcohol-associated liver disease. The intricate communication between intestine and liver involves communication between multiple cellular components in each organ that enable them to carry out their physiological functions. In this review, we focus on novel approaches to understanding how chronic alcohol exposure impacts the microbiome and individual cells within the liver and intestine, as well as the impact of ethanol on the molecular machinery required for intraorgan and interorgan communication.
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Affiliation(s)
- Fernanda Raya Tonetti
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Alvaro Eguileor
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Marko Mrdjen
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, Ohio, USA
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio, USA
| | - Vai Pathak
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio, USA
| | - Jared Travers
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Gastroenterology and Hepatology, University Hospital, Cleveland, Ohio, USA
| | - Laura E Nagy
- Department of Molecular Medicine, Case Western Reserve University, Cleveland, Ohio, USA
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Gastroenterology and Hepatology, Cleveland Clinic, Cleveland, Ohio, USA
| | - Cristina Llorente
- Department of Medicine, University of California San Diego, La Jolla, California, USA
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Koutromanos I, Legaki E, Gazouli M, Vasilopoulos E, Kouzoupis A, Tzavellas E. Gut microbiome in alcohol use disorder: Implications for health outcomes and therapeutic strategies-a literature review. World J Methodol 2024; 14:88519. [PMID: 38577203 PMCID: PMC10989405 DOI: 10.5662/wjm.v14.i1.88519] [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: 09/27/2023] [Revised: 12/22/2023] [Accepted: 01/24/2024] [Indexed: 03/07/2024] Open
Abstract
Alcohol use disorder (AUD) represents a major public health issue which affects millions of people globally and consist a chronic relapsing condition associated with substantial morbidity and mortality. The gut microbiome plays a crucial role in maintaining overall health and has emerged as a significant contributor to the pathophysiology of various psychiatric disorders. Recent evidence suggests that the gut microbiome is intimately linked to the development and progression of AUD, with alcohol consumption directly impacting its composition and function. This review article aims to explore the intricate relationship between the gut microbiome and AUD, focusing on the implications for mental health outcomes and potential therapeutic strategies. We discuss the bidirectional communication between the gut microbiome and the brain, highlighting the role of microbiota-derived metabolites in neuroinflammation, neurotransmission, and mood regulation. Furthermore, we examine the influence of AUD-related factors, such as alcohol-induced gut dysbiosis and increased intestinal permeability, on mental health outcomes. Finally, we explore emerging therapeutic avenues targeting the gut microbiome in the management of AUD, including prebiotics, probiotics, and fecal microbiota transplantation. Understanding the complex interplay between the gut microbiome and AUD holds promise for developing novel interventions that could improve mental health outcomes in individuals with AUD.
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Affiliation(s)
- Ilias Koutromanos
- First Department of Psychiatry, "Aiginition" Hospital, School of Medicine, National and Kapodistrian University of Athens, School of Medicine, National and Kapodistrian University of Athens, Athens 11528, Greece
| | - Evangelia Legaki
- Department of Basic Biological Science, School of Medicine, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Maria Gazouli
- Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Efthimios Vasilopoulos
- First Department of Psychiatry, "Aiginition" Hospital, School of Medicine, National and Kapodistrian University of Athens, School of Medicine, National and Kapodistrian University of Athens, Athens 11528, Greece
| | - Anastasios Kouzoupis
- First Department of Psychiatry, "Aiginition" Hospital, School of Medicine, National and Kapodistrian University of Athens, School of Medicine, National and Kapodistrian University of Athens, Athens 11528, Greece
| | - Elias Tzavellas
- First Department of Psychiatry, "Aiginition" Hospital, School of Medicine, National and Kapodistrian University of Athens, School of Medicine, National and Kapodistrian University of Athens, Athens 11528, Greece
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5
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Shen M, Zhao H, Han M, Su L, Cui X, Li D, Liu L, Wang C, Yang F. Alcohol-induced gut microbiome dysbiosis enhances the colonization of Klebsiella pneumoniae on the mouse intestinal tract. mSystems 2024; 9:e0005224. [PMID: 38345382 PMCID: PMC10949497 DOI: 10.1128/msystems.00052-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 03/20/2024] Open
Abstract
Chronic alcohol consumption, an important risk factor for diseases and deaths, can cause intestinal microbiota dysbiosis and increase the infection of some opportunistic pathogens. However, the current studies on the effects of alcohol-induced intestinal microbiota dysbiosis on gut colonization of Klebsiella pneumoniae are still scarce. In the present study, we established a binge-on-chronic alcohol model in mice to identify the characteristics of alcohol-induced intestinal microbiome and metabolite dysbiosis using multi-omics and explored the effects and potential mechanisms of these dysbioses on the intestinal colonization of K. pneumoniae. The results show that chronic alcohol consumption alters the diversity and composition of gut microbiota (including bacteria and fungi), decreases the complexity of the interaction between intestinal bacteria and fungi, disturbs the gut metabolites, and promotes the colonization of K. pneumoniae on the gut of mice. The relevance analyses find that alcohol-induced gut microbiome dysbiosis has a strong correlation with the alteration of secondary bile acids. In vitro results suggest that the high concentration of lithocholic acid, a secondary bile acid, could significantly inhibit the proliferation of K. pneumoniae, and the adhesion of K. pneumoniae to Caco-2 cells. Our results indicate that alcohol-induced microbiome dysbiosis contributes to decreased levels of secondary bile acids, which was one of the main reasons affecting the colonization of K. pneumoniae in mice's intestines. Some secondary bile acids (e.g., lithocholic acid) might be a potential drug to prevent the colonization and spread of K. pneumoniae.IMPORTANCEAlcohol is one of the most commonly misused substances in our lives. However, long-term heavy drinking will increase the colonization of some opportunistic pathogens (e.g., Klebsiella pneumoniae) in the body. Here, we revealed that binge-on-chronic alcohol consumption disrupted the balance between gut bacteria and fungi, induced the gut microbiome and metabolites dysbiosis, and promoted the colonization of K. pneumoniae in the intestine of mice. In particular, alcohol-taking disrupted intestinal bile acid metabolism and reduced the lithocholic acid concentration. However, a high concentration of lithocholic acid can protect against intestinal colonization of K. pneumoniae by inhabiting the bacterial growth and adhesion to the host cell. Hence, regulating the balance of gut microbiota and intestinal bile acid metabolism may be a potential strategy for reducing the risk of K. pneumoniae infection and spread.
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Affiliation(s)
- Mengke Shen
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
- Department of Pathogenic Biology and Immunology, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Huajie Zhao
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Meiqing Han
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Lin Su
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Xiaojian Cui
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Duan Li
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Liang Liu
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Chuansheng Wang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Fan Yang
- Department of Pathogenic Biology, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
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6
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Day AW, Kumamoto CA. Selection of ethanol tolerant strains of Candida albicans by repeated ethanol exposure results in strains with reduced susceptibility to fluconazole. PLoS One 2024; 19:e0298724. [PMID: 38377103 PMCID: PMC10878505 DOI: 10.1371/journal.pone.0298724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/23/2024] [Indexed: 02/22/2024] Open
Abstract
Candida albicans is a commensal yeast that has important impacts on host metabolism and immune function, and can establish life-threatening infections in immunocompromised individuals. Previously, C. albicans colonization has been shown to contribute to the progression and severity of alcoholic liver disease. However, relatively little is known about how C. albicans responds to changing environmental conditions in the GI tract of individuals with alcohol use disorder, namely repeated exposure to ethanol. In this study, we repeatedly exposed C. albicans to high concentrations (10% vol/vol) of ethanol-a concentration that can be observed in the upper GI tract of humans following consumption of alcohol. Following this repeated exposure protocol, ethanol small colony (Esc) variants of C. albicans isolated from these populations exhibited increased ethanol tolerance, altered transcriptional responses to ethanol, and cross-resistance/tolerance to the frontline antifungal fluconazole. These Esc strains exhibited chromosomal copy number variations and carried polymorphisms in genes previously associated with the acquisition of fluconazole resistance during human infection. This study identifies a selective pressure that can result in evolution of fluconazole tolerance and resistance without previous exposure to the drug.
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Affiliation(s)
- Andrew W. Day
- Graduate School of Biomedical Sciences, Tufts University, Boston, Massachusetts, United States of America
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, United States of America
| | - Carol A. Kumamoto
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, United States of America
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7
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Viebahn G, Hartmann P, Lang S, Demir M, Zhang X, Fouts DE, Stärkel P, Schnabl B. Fungal signature differentiates alcohol-associated liver disease from nonalcoholic fatty liver disease. Gut Microbes 2024; 16:2307586. [PMID: 38298161 PMCID: PMC10841010 DOI: 10.1080/19490976.2024.2307586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 01/16/2024] [Indexed: 02/02/2024] Open
Abstract
The fungal microbiota plays an important role in the pathogenesis of alcohol-associated liver disease (ALD) and nonalcoholic fatty liver disease (NAFLD). In this study, we aimed to compare changes of the fecal fungal microbiota between patients with ALD and NAFLD and to elucidate patterns in different disease stages between the two conditions. We analyzed fungal internal transcribed spacer 2 (ITS2) sequencing using fecal samples from a cohort of 48 patients with ALD, 78 patients with NAFLD, and 34 controls. The fungal microbiota differed significantly between ALD and NAFLD. The genera Saccharomyces, Kluyveromyces, Scopulariopsis, and the species Candida albicans (C. albicans), Malassezia restricta (M. restricta), Scopulariopsis cordiae (S. cordiae) were significantly increased in patients with ALD, whereas the genera Kazachstania and Mucor were significantly increased in the NAFLD cohort. We identified the fungal signature consisting of Scopulariopsis, Kluyveromyces, M. restricta, and Mucor to have the highest discriminative ability to detect ALD vs NAFLD with an area under the curve (AUC) of 0.93. When stratifying the ALD and NAFLD cohorts by fibrosis severity, the fungal signature with the highest AUC of 0.92 to distinguish ALD F0-F1 vs NAFLD F0-F1 comprised Scopulariopsis, Kluyveromyces, Mucor, M. restricta, and Kazachstania. For more advanced fibrosis stages (F2-F4), the fungal signature composed of Scopulariopsis, Kluyveromyces, Mucor, and M. restricta achieved the highest AUC of 0.99 to differentiate ALD from NAFLD. This is the first study to identify a fungal signature to differentiate two metabolic fatty liver diseases from each other, specifically ALD from NAFLD. This might have clinical utility in unclear cases and might hence help shape treatment approaches. However, larger studies are required to validate this fungal signature in other populations of ALD and NAFLD.
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Affiliation(s)
- Greta Viebahn
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Phillipp Hartmann
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Pediatrics, University of California San Diego, La Jolla, CA, USA
- Division of Gastroenterology, Hepatology & Nutrition, Rady Children’s Hospital San Diego, San Diego, CA, USA
| | - Sonja Lang
- Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Münevver Demir
- Department of Hepatology and Gastroenterology, Campus Virchow Clinic and Campus Charité Mitte, Charité University Medicine, Berlin, Germany
| | - Xinlian Zhang
- Division of Biostatistics and Bioinformatics, Herbert Wertheim School of Public Health and Human Longevity Science, University of California San Diego, La Jolla, CA, USA
| | - Derrick E. Fouts
- Department of Genomic Medicine, J. Craig Venter Institute, Rockville, MD, USA
| | - Peter Stärkel
- Université Catholique de Louvain, St. Luc University Hospital, Brussels, Belgium
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
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Wang T, Jia Z, An C, Ren P, Yang Y, Wang W, Su L. The Protective Effect of Auricularia cornea var. Li. Polysaccharide on Alcoholic Liver Disease and Its Effect on Intestinal Microbiota. Molecules 2023; 28:8003. [PMID: 38138493 PMCID: PMC10745760 DOI: 10.3390/molecules28248003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 11/26/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023] Open
Abstract
This study's objective was to examine the protective effect and mechanism of a novel polysaccharide (AYP) from Auricularia cornea var. Li. on alcoholic liver disease in mice. AYP was extracted from the fruiting bodies of Auricularia cornea var. Li. by enzymatic extraction and purified by DEAE-52 and Sephacryl S-400. Structural features were determined using high-performance liquid chromatography, ion exchange chromatography and Fourier-transform infrared analysis. Additionally, alcoholic liver disease (ALD) mice were established to explore the hepatoprotective activity of AYP (50, 100 and 200 mg/kg/d). Here, our results showed that AYP presented high purity with a molecular weight of 4.64 × 105 Da. AYP was composed of galacturonic acid, galactose, glucose, arabinose, mannose, xylose, rhamnose, ribos, glucuronic acid and fucose (molar ratio: 39.5:32.9:23.6:18.3:6.5:5.8:5.8:3.3:2:1.1). Notably, AYP remarkably reduced liver function impairment (alanine aminotransferase (ALT), aspartate aminotransferase (AST), triglyceride (TG), total cholesterol (TC)), nitric oxide (NO) and malondialdehyde (MDA) of the liver and enhanced the activity of antioxidant enzymes (superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and glutathione (gGSH)) in mice with ALD. Meanwhile, the serum level of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) were reduced in ALD mice treated by AYP. Furthermore, the AYPH group was the most effective and was therefore chosen to further investigate its effect on the intestinal microbiota (bacteria and fungi) of ALD mice. Based on 16s rRNA and ITS-1 sequencing data, AYP influenced the homeostasis of intestinal microbiota to mitigate the damage of ALD mice, possibly by raising the abundance of favorable microbiota (Muribaculaceae, Lachnospiraceae and Kazachstania) and diminishing the abundance of detrimental microbiota (Lactobacillus, Mortierella and Candida). This discovery opens new possibilities for investigating physiological activity in A. cornea var. Li. and provides theoretical references for natural liver-protecting medication research.
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Affiliation(s)
- Tianci Wang
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun 130118, China; (T.W.); (Z.J.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
| | - Zikun Jia
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun 130118, China; (T.W.); (Z.J.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
| | - Canghai An
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
| | - Ping Ren
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Yiting Yang
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Wanting Wang
- Engineering Research Center of Bioreactor and Pharmaceutical Development, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Ling Su
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun 130118, China; (T.W.); (Z.J.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
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Wang C, Yan J, Du K, Liu S, Wang J, Wang Q, Zhao H, Li M, Yan D, Zhang R, Yang F. Intestinal microbiome dysbiosis in alcohol-dependent patients and its effect on rat behaviors. mBio 2023; 14:e0239223. [PMID: 37962470 PMCID: PMC10746284 DOI: 10.1128/mbio.02392-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 10/03/2023] [Indexed: 11/15/2023] Open
Abstract
IMPORTANCE Intestinal microbiome dysbiosis is associated with psychiatric disease through the "microbiota-gut-brain" axis. Here, we revealed that there was obvious intestinal microbiome (including bacterial and fungal) dysbiosis in alcohol-dependent patients. Alcohol consumption seriously disturbs the gut equilibrium between bacteria and fungi, reduces the interactions among bacterial-fungal trans-kingdom, and increases intestinal permeability. Gut microbiota should be considered as a whole to study the development of alcohol dependence. The gut microbiome of alcohol-dependent patients increased the anxiety- and depression-like behavior in rats. The gut microbiota dysbiosis may promote the development of alcohol dependence by regulating the endogenous cholecystokinin (CCK) and related receptors. Hence, regulating the balance of gut microbiota and the endogenous CCK may be a potential strategy for reducing the risk of relapse in alcohol addiction patients.
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Affiliation(s)
- Chuansheng Wang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Junli Yan
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Keda Du
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Shuai Liu
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Jiali Wang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Qi Wang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Huajie Zhao
- Department of Pathogeny, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Min Li
- Department of Pathogeny, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Dong Yan
- Department of Pathogeny, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
| | - Ruiling Zhang
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, China
| | - Fan Yang
- Department of Pathogeny, School of Basic Medical Science, Xinxiang Medical University, Xinxiang, China
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10
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Day AW, Kumamoto CA. Selection of Ethanol Tolerant Strains of Candida albicans by Repeated Ethanol Exposure Results in Strains with Reduced Susceptibility to Fluconazole. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.13.557677. [PMID: 37745460 PMCID: PMC10515905 DOI: 10.1101/2023.09.13.557677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Candida albicans is a commensal yeast that has important impacts on host metabolism and immune function, and can establish life-threatening infections in immunocompromised individuals. Previously, C. albicans colonization has been shown to contribute to the progression and severity of alcoholic liver disease. However, relatively little is known about how C. albicans responds to changing environmental conditions in the GI tract of individuals with alcohol use disorder, namely repeated exposure to ethanol. In this study, we repeatedly exposed C. albicans to high concentrations (10% vol/vol) of ethanol-a concentration that can be observed in the upper GI tract of humans following consumption of alcohol. Following this repeated exposure protocol, ethanol small colony (Esc) variants of C. albicans isolated from these populations exhibited increased ethanol tolerance, altered transcriptional responses to ethanol, and cross-resistance/tolerance to the frontline antifungal fluconazole. These Esc strains exhibited chromosomal copy number variations and carried polymorphisms in genes previously associated with the acquisition of fluconazole resistance during human infection. This study identifies a selective pressure that can result in evolution of fluconazole tolerance and resistance without previous exposure to the drug.
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Affiliation(s)
- Andrew W. Day
- Graduate School of Biomedical Sciences, Tufts University, Boston, Massachusetts, 02111, USA
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, 02111, USA
| | - Carol A. Kumamoto
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, 02111, USA
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11
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Prince DS, Nash E, Liu K. Alcohol-Associated Liver Disease: Evolving Concepts and Treatments. Drugs 2023; 83:1459-1474. [PMID: 37747685 PMCID: PMC10624727 DOI: 10.1007/s40265-023-01939-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2023] [Indexed: 09/26/2023]
Abstract
Alcohol is a prominent cause of liver disease worldwide with higher prevalence in developed nations. The spectrum of alcohol-associated liver disease (ALD) encompasses a diverse range of clinical entities, from asymptomatic isolated steatosis to decompensated cirrhosis, and in some cases, acute or chronic liver failure. Consequently, it is important for healthcare practitioners to maintain awareness and systematically screen for ALD. The optimal evaluation and management of ALD necessitates a collaborative approach, incorporating a multidisciplinary team and accounting for concurrent medical conditions. A repertoire of therapeutic interventions exists to support patients in achieving alcohol cessation and sustaining remission, with complete abstinence being the ultimate objective. This review explores the existing therapeutic options for ALD acknowledging geographical discrepancies in accessibility. Recent innovations, including the inclusion of alcohol consumption biomarkers into clinical protocols and the expansion of liver transplantation eligibility to encompass severe alcohol-associated hepatitis, are explored.
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Affiliation(s)
- David Stephen Prince
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
- Department of Gastroenterology and Liver, Liverpool Hospital, Sydney, NSW, Australia.
- Liver Injury and Cancer Program, Centenary Institute, Sydney, NSW, Australia.
- The Ingham Institute for Applied Medical Research, Sydney, NSW, Australia.
- Faculty of Medicine and Health, The University of New South Wales, Sydney, NSW, Australia.
| | - Emily Nash
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Ken Liu
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- Liver Injury and Cancer Program, Centenary Institute, Sydney, NSW, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
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12
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Hartmann P, Lang S, Schierwagen R, Klein S, Praktiknjo M, Trebicka J, Schnabl B. Fecal cytolysin does not predict disease severity in acutely decompensated cirrhosis and acute-on-chronic liver failure. Hepatobiliary Pancreat Dis Int 2023; 22:474-481. [PMID: 37198098 PMCID: PMC10797562 DOI: 10.1016/j.hbpd.2023.05.003] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/02/2023] [Indexed: 05/19/2023]
Abstract
BACKGROUND Cirrhosis with acute decompensation (AD) and acute-on-chronic liver failure (ACLF) are characterized by high morbidity and mortality. Cytolysin, a toxin from Enterococcus faecalis (E. faecalis), is associated with mortality in alcohol-associated hepatitis (AH). It is unclear whether cytolysin also contributes to disease severity in AD and ACLF. METHODS We studied the role of fecal cytolysin in 78 cirrhotic patients with AD/ACLF. Bacterial DNA from fecal samples was extracted and real-time quantitative polymerase chain reaction (PCR) was performed. The association between fecal cytolysin and liver disease severity in cirrhosis with AD or ACLF was analyzed. RESULTS Fecal cytolysin and E. faecalis abundance did not predict chronic liver failure (CLIF-C) AD and ACLF scores. Presence of fecal cytolysin was not associated with other liver disease markers, including Fibrosis-4 (FIB-4) index, 'Age, serum Bilirubin, INR, and serum Creatinine (ABIC)' score, Child-Pugh score, model for end-stage liver disease (MELD) nor MELD-Na scores in AD or ACLF patients. CONCLUSIONS Fecal cytolysin does not predict disease severity in AD and ACLF patients. The predictive value of fecal cytolysin positivity for mortality appears to be restricted to AH.
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Affiliation(s)
- Phillipp Hartmann
- Department of Pediatrics, University of California San Diego, La Jolla, CA, USA; Division of Gastroenterology, Hepatology & Nutrition, Rady Children's Hospital San Diego, San Diego, CA, USA
| | - Sonja Lang
- Department of Medicine, University of California San Diego, La Jolla, CA, USA; Department of Gastroenterology and Hepatology, Faculty of Medicine, University of Cologne, University Hospital Cologne, Cologne, Germany
| | - Robert Schierwagen
- Department of Internal Medicine B, University of Münster, Münster, Germany
| | - Sabine Klein
- Department of Internal Medicine B, University of Münster, Münster, Germany
| | - Michael Praktiknjo
- Department of Internal Medicine B, University of Münster, Münster, Germany
| | - Jonel Trebicka
- Department of Internal Medicine B, University of Münster, Münster, Germany; European Foundation for the Study of Chronic Liver Failure, Barcelona, Spain
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA; Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA.
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13
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Aghara H, Chadha P, Zala D, Mandal P. Stress mechanism involved in the progression of alcoholic liver disease and the therapeutic efficacy of nanoparticles. Front Immunol 2023; 14:1205821. [PMID: 37841267 PMCID: PMC10570533 DOI: 10.3389/fimmu.2023.1205821] [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: 04/14/2023] [Accepted: 09/07/2023] [Indexed: 10/17/2023] Open
Abstract
Alcoholic liver disease (ALD) poses a significant threat to human health, with excessive alcohol intake disrupting the immunotolerant environment of the liver and initiating a cascade of pathological events. This progressive disease unfolds through fat deposition, proinflammatory cytokine upregulation, activation of hepatic stellate cells, and eventual development of end-stage liver disease, known as hepatocellular carcinoma (HCC). ALD is intricately intertwined with stress mechanisms such as oxidative stress mediated by reactive oxygen species, endoplasmic reticulum stress, and alcohol-induced gut dysbiosis, culminating in increased inflammation. While the initial stages of ALD can be reversible with diligent care and abstinence, further progression necessitates alternative treatment approaches. Herbal medicines have shown promise, albeit limited by their poor water solubility and subsequent lack of extensive exploration. Consequently, researchers have embarked on a quest to overcome these challenges by delving into the potential of nanoparticle-mediated therapy. Nanoparticle-based treatments are being explored for liver diseases that share similar mechanisms with alcoholic liver disease. It underscores the potential of these innovative approaches to counteract the complex pathogenesis of ALD, providing new avenues for therapeutic intervention. Nevertheless, further investigations are imperative to fully unravel the therapeutic potential and unlock the promise of nanoparticle-mediated therapy specifically tailored for ALD treatment.
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Affiliation(s)
| | | | | | - Palash Mandal
- P D Patel Institute of Applied Sciences, Charotar University of Science and Technology, Anand, Gujarat, India
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14
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Aghara H, Chadha P, Zala D, Mandal P. Stress mechanism involved in the progression of alcoholic liver disease and the therapeutic efficacy of nanoparticles. Front Immunol 2023; 14. [DOI: https:/doi.org/10.3389/fimmu.2023.1205821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023] Open
Abstract
Alcoholic liver disease (ALD) poses a significant threat to human health, with excessive alcohol intake disrupting the immunotolerant environment of the liver and initiating a cascade of pathological events. This progressive disease unfolds through fat deposition, proinflammatory cytokine upregulation, activation of hepatic stellate cells, and eventual development of end-stage liver disease, known as hepatocellular carcinoma (HCC). ALD is intricately intertwined with stress mechanisms such as oxidative stress mediated by reactive oxygen species, endoplasmic reticulum stress, and alcohol-induced gut dysbiosis, culminating in increased inflammation. While the initial stages of ALD can be reversible with diligent care and abstinence, further progression necessitates alternative treatment approaches. Herbal medicines have shown promise, albeit limited by their poor water solubility and subsequent lack of extensive exploration. Consequently, researchers have embarked on a quest to overcome these challenges by delving into the potential of nanoparticle-mediated therapy. Nanoparticle-based treatments are being explored for liver diseases that share similar mechanisms with alcoholic liver disease. It underscores the potential of these innovative approaches to counteract the complex pathogenesis of ALD, providing new avenues for therapeutic intervention. Nevertheless, further investigations are imperative to fully unravel the therapeutic potential and unlock the promise of nanoparticle-mediated therapy specifically tailored for ALD treatment.
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15
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Seitz HK, Moreira B, Neuman MG. Pathogenesis of Alcoholic Fatty Liver a Narrative Review. Life (Basel) 2023; 13:1662. [PMID: 37629519 PMCID: PMC10455719 DOI: 10.3390/life13081662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 07/12/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
Alcohol effect hepatic lipid metabolism through various mechanisms, leading synergistically to an accumulation of fatty acids (FA) and triglycerides. Obesity, as well as dietary fat (saturated fatty acids (FA) versus poly-unsaturated fatty acids (PUFA)) may modulate the hepatic fat. Alcohol inhibits adenosine monophosphate activated kinase (AMPK). AMPK activates peroxisome proliferator activated receptor a (PPARα) and leads to a decreased activation of sterol regulatory element binding protein 1c (SRABP1c). The inhibition of AMPK, and thus of PPARα, results in an inhibition of FA oxidation. This ß-oxidation is further reduced due to mitochondrial damage induced through cytochrome P4502E1 (CYP2E1)-driven oxidative stress. Furthermore, the synthesis of FAs is stimulated through an activation of SHREP1. In addition, alcohol consumption leads to a reduced production of adiponectin in adipocytes due to oxidative stress and to an increased mobilization of FAs from adipose tissue and from the gut as chylomicrons. On the other side, the secretion of FAs via very-low-density lipoproteins (VLDL) from the liver is inhibited by alcohol. Alcohol also affects signal pathways such as early growth response 1 (Egr-1) associated with the expression of tumour necrosis factor α (TNF α), and the mammalian target of rapamycin (mTOR) a key regulator of autophagy. Both have influence the pathogenesis of alcoholic fatty liver. Alcohol-induced gut dysbiosis contributes to the severity of ALD by increasing the metabolism of ethanol in the gut and promoting intestinal dysfunction. Moreover, pathogen-associated molecular patterns (PAMPS) via specific Toll-like receptor (TLR) bacterial overgrowth leads to the translocation of bacteria. Endotoxins and toxic ethanol metabolites enter the enterohepatic circulation, reaching the liver and inducing the activation of the nuclear factor kappa-B (NFκB) pathway. Pro-inflammatory cytokines released in the process contribute to inflammation and fibrosis. In addition, cellular apoptosis is inhibited in favour of necrosis.
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Affiliation(s)
- Helmut K. Seitz
- Centre of Liver and Alcohol Associated Diseases, Ethianum Clinic, Faculty of Medicine, University of Heidelberg, 69120 Heidelberg, Germany;
| | - Bernardo Moreira
- Centre of Liver and Alcohol Associated Diseases, Ethianum Clinic, Faculty of Medicine, University of Heidelberg, 69120 Heidelberg, Germany;
| | - Manuela G. Neuman
- In Vitro Drug Safety and Biotechnology, Department of Pharmacology and Toxicology, Temerity Faculty of Medicine, University of Toronto, Banting Institute, Toronto, ON M5G 1L5, Canada;
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16
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Cabré N, Hartmann P, Llorente C, Kouno T, Wang Y, Zeng S, Kim HY, Zhang X, Kisseleva T, Iyer S, Kudumala S, Schnabl B. IgY antibodies against cytolysin reduce ethanol-induced liver disease in mice. Hepatology 2023; 78:295-306. [PMID: 36811393 PMCID: PMC10293100 DOI: 10.1097/hep.0000000000000324] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/11/2023] [Indexed: 02/24/2023]
Abstract
BACKGROUND AND AIMS Patients with severe alcohol-associated hepatitis have high morbidity and mortality. Novel therapeutic approaches are urgently needed. The aims of our study were to confirm the predictive value of cytolysin-positive Enterococcus faecalis ( E. faecalis ) for mortality in patients with alcohol-associated hepatitis and to assess the protective effect of specific chicken immunoglobulin Y (IgY) antibodies against cytolysin in vitro and in a microbiota-humanized mouse model of ethanol-induced liver disease. APPROACH AND RESULTS We investigated a multicenter cohort of 26 subjects with alcohol-associated hepatitis and confirmed our previous findings that the presence of fecal cytolysin-positive E. faecalis predicted 180-day mortality in those patients. After combining this smaller cohort with our previously published multicenter cohort, the presence of fecal cytolysin has a better diagnostic area under the curve, better other accuracy measures, and a higher odds ratio to predict death in patients with alcohol-associated hepatitis than other commonly used liver disease models. In a precision medicine approach, we generated IgY antibodies against cytolysin from hyperimmunized chickens. Neutralizing IgY antibodies against cytolysin reduced cytolysin-induced cell death in primary mouse hepatocytes. The oral administration of IgY antibodies against cytolysin decreased ethanol-induced liver disease in gnotobiotic mice colonized with stool from cytolysin-positive patients with alcohol-associated hepatitis. CONCLUSIONS E. faecalis cytolysin is an important mortality predictor in alcohol-associated hepatitis patients, and its targeted neutralization through specific antibodies improves ethanol-induced liver disease in microbiota-humanized mice.
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Affiliation(s)
- Noemí Cabré
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Phillipp Hartmann
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, USA
- Division of Gastroenterology, Hepatology & Nutrition, Rady Children’s Hospital San Diego, San Diego, CA, USA
| | - Cristina Llorente
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Tetsuya Kouno
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Yanhan Wang
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Suling Zeng
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Hyun Young Kim
- Department of Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Xinlian Zhang
- Division of Biostatistics and Bioinformatics, Herbert Wertheim School of Public Health and Human Longevity Science, University of California San Diego, La Jolla, CA, USA
| | - Tatiana Kisseleva
- Department of Surgery, University of California, San Diego, La Jolla, CA, USA
| | | | | | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
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17
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Kaufmann B, Seyfried N, Hartmann D, Hartmann P. Probiotics, prebiotics, and synbiotics in nonalcoholic fatty liver disease and alcohol-associated liver disease. Am J Physiol Gastrointest Liver Physiol 2023; 325:G42-G61. [PMID: 37129252 PMCID: PMC10312326 DOI: 10.1152/ajpgi.00017.2023] [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: 02/03/2023] [Revised: 04/26/2023] [Accepted: 04/26/2023] [Indexed: 05/03/2023]
Abstract
The use of probiotics, prebiotics, and synbiotics has become an important therapy in numerous gastrointestinal diseases in recent years. Modifying the gut microbiota, this therapeutic approach helps to restore a healthy microbiome. Nonalcoholic fatty liver disease and alcohol-associated liver disease are among the leading causes of chronic liver disease worldwide. A disrupted intestinal barrier, microbial translocation, and an altered gut microbiome metabolism, or metabolome, are crucial in the pathogenesis of these chronic liver diseases. As pro-, pre-, and synbiotics modulate these targets, they were identified as possible new treatment options for liver disease. In this review, we highlight the current findings on clinical and mechanistic effects of this therapeutic approach in nonalcoholic fatty liver disease and alcohol-associated liver disease.
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Affiliation(s)
- Benedikt Kaufmann
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Nick Seyfried
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Daniel Hartmann
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Phillipp Hartmann
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
- Department of Pediatrics, University of California San Diego, La Jolla, California, United States
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18
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Hsu CL, Lang S, Demir M, Fouts DE, Stärkel P, Schnabl B. Any alcohol use in NAFLD patients is associated with significant changes to the intestinal virome. Hepatology 2023; 77:2073-2083. [PMID: 36631002 PMCID: PMC10192041 DOI: 10.1097/hep.0000000000000238] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/23/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND AIMS The prevalence of alcohol use disorder (AUD) and metabolic dysfunction-associated fatty liver disease (MAFLD) are increasing worldwide, leading to the increasing likelihood of both etiologies contributing to a patient's liver disease. However, the effects of modest alcohol use in NAFLD are controversial and more studies are needed. We compared the intestinal viromes of patients with AUD and NAFLD in order to evaluate the effect of alcohol consumption on the intestinal viromes of NAFLD patients by extracting virus-like particles and performing metagenomic sequencing. APPROACH AND RESULTS Viral nucleic acids were extracted from fecal samples and subjected to metagenomic sequencing. We demonstrate significant differences in the intestinal viromes of NAFLD and AUD patients, and that alcohol use in NAFLD patients reclassified to MAFLD accounted for significant differences in the intestinal viromes. The relative abundance of several Lactococcus phages was more similar between AUD patients and alcohol-consuming MAFLD patients than non-alcohol-consuming MAFLD patients and control subjects, and multivariate modeling using the most discriminating Lactococcus phages could better predict alcohol use in the MAFLD population than the alcohol-associated liver disease/NAFLD Index. Significant differences in the viral composition and diversity were also seen between MAFLD patients with low and moderate alcohol consumption compared with no alcohol consumption. CONCLUSIONS The intestinal virome of MAFLD patients who consume low to moderate amounts of alcohol are significantly different from those who do not, and many features of the intestinal virome of alcohol-consuming MAFLD patients resemble that of AUD patients.
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Affiliation(s)
- Cynthia L. Hsu
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Sonja Lang
- University of Cologne, Faculty of Medicine, and University Hospital Cologne, Department of Gastroenterology and Hepatology, Cologne, Germany
| | - Münevver Demir
- Department of Hepatology and Gastroenterology, Campus Virchow Clinic and Campus Charité Mitte, Charité Universitätsmedizin, Berlin, Germany
| | | | - Peter Stärkel
- Department of Hepatology and Gastroenterology, St. Luc University Hospital, Catholic University of Louvain, Brussels, Belgium
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Center for Innovative Phage Applications and Therapeutics, University of California San Diego, La Jolla, CA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
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19
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Jayasekera D, Hartmann P. Noninvasive biomarkers in pediatric nonalcoholic fatty liver disease. World J Hepatol 2023; 15:609-640. [PMID: 37305367 PMCID: PMC10251277 DOI: 10.4254/wjh.v15.i5.609] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/14/2023] [Accepted: 04/10/2023] [Indexed: 05/24/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease worldwide among children and adolescents. It encompasses a spectrum of disease, from its mildest form of isolated steatosis, to nonalcoholic steatohepatitis (NASH) to liver fibrosis and cirrhosis, or end-stage liver disease. The early diagnosis of pediatric NAFLD is crucial in preventing disease progression and in improving outcomes. Currently, liver biopsy is the gold standard for diagnosing NAFLD. However, given its invasive nature, there has been significant interest in developing noninvasive methods that can be used as accurate alternatives. Here, we review noninvasive biomarkers in pediatric NAFLD, focusing primarily on the diagnostic accuracy of various biomarkers as measured by their area under the receiver operating characteristic, sensitivity, and specificity. We examine two major approaches to noninvasive biomarkers in children with NAFLD. First, the biological approach that quantifies serological biomarkers. This includes the study of individual circulating molecules as biomarkers as well as the use of composite algorithms derived from combinations of biomarkers. The second is a more physical approach that examines data measured through imaging techniques as noninvasive biomarkers for pediatric NAFLD. Each of these approaches was applied to children with NAFLD, NASH, and NAFLD with fibrosis. Finally, we suggest possible areas for future research based on current gaps in knowledge.
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Affiliation(s)
- Dulshan Jayasekera
- Department of Internal Medicine and Department of Pediatrics, University of California San Diego, La Jolla, CA 92093, United States
| | - Phillipp Hartmann
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology, and Nutrition, University of California San Diego, La Jolla, CA 92093, United States.
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20
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Chen X, Mendes BG, Alves BS, Duan Y. Phage therapy in gut microbiome. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2023; 201:93-118. [PMID: 37770177 DOI: 10.1016/bs.pmbts.2023.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Phage therapy, the use of bacteriophage viruses for bacterial infection treatment, has been around for almost a century, but with the increase in antibiotic use, its importance has declined rapidly. There has been renewed interest in revisiting this practice due to the general decline in the effectiveness of antibiotics, combined with improved understanding of human microbiota and advances in sequencing technologies. Phage therapy has been proposed as a clinical alternative to restore the gut microbiota in the absence of an effective treatment. That is due to its immunomodulatory and bactericidal effects against its target bacteria. In the gastrointestinal diseases field, phage therapy has been studied mainly as a promising tool in infectious diseases treatment, such as cholera and diarrhea. However, many studies have been conducted in non-communicable diseases, such as the targeting of adherent invasive Escherichia coli in Crohn's disease, the treatment of Clostridioides difficile in ulcerative colitis, the eradication of Fusobacterium nucleatum in colorectal cancer, the targeting of alcohol-producing Klebsiella pneumoniae in non-alcoholic fatty liver disease, or Enterococcus faecalis in alcohol-associated hepatitis. This review will summarize the changes in the gut microbiota and the phageome in association with some gastrointestinal and liver diseases and highlight the recent scientific advances in phage therapy as a therapeutic tool for their treatment.
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Affiliation(s)
- Xingyao Chen
- Department of Infectious Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Beatriz G Mendes
- Department of Clinical Analysis, Health Sciences Center, Federal University of Santa Catarina, Campus Universitário Trindade, Florianópolis, Santa Catarina, Brazil
| | - Bruno Secchi Alves
- Department of Clinical Analysis, Health Sciences Center, Federal University of Santa Catarina, Campus Universitário Trindade, Florianópolis, Santa Catarina, Brazil
| | - Yi Duan
- Department of Infectious Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China.
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21
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Hartmann P, Schnabl B. Fungal infections and the fungal microbiome in hepatobiliary disorders. J Hepatol 2023; 78:836-851. [PMID: 36565724 PMCID: PMC10033447 DOI: 10.1016/j.jhep.2022.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022]
Abstract
Liver and biliary diseases affect more than a billion people worldwide, with high associated morbidity and mortality. The impact of the intestinal bacterial microbiome on liver diseases has been well established. However, the fungal microbiome, or mycobiome, has been overlooked for a long time. Recently, several studies have shed light on the role of the mycobiome in the development and progression of hepatobiliary diseases. In particular, the fungal genus Candida has been found to be involved in the pathogenesis of multiple hepatobiliary conditions. Herein, we compare colonisation and infection, describe mycobiome findings in the healthy state and across the various hepatobiliary conditions, and point toward communalities. We detail how quantitation of immune responses to fungal antigens can be employed to predict disease severity, e.g. using antibodies to Saccharomyces cerevisiae or specific anti-Candida albicans antibodies. We also show how fungal products (e.g. beta-glucans, candidalysin) activate the host's immune system to exacerbate liver and biliary diseases. Finally, we describe how the gut mycobiome can be modulated to ameliorate hepatobiliary conditions.
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Affiliation(s)
- Phillipp Hartmann
- Department of Medicine, University of California San Diego, La Jolla, CA, USA; Department of Pediatrics, University of California San Diego, La Jolla, CA, USA; Division of Gastroenterology, Hepatology & Nutrition, Rady Children's Hospital San Diego, San Diego, CA, USA
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA; Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA.
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22
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Zeng S, Rosati E, Saggau C, Messner B, Chu H, Duan Y, Hartmann P, Wang Y, Ma S, Huang WJM, Lee J, Lee SM, Carvalho-Gontijo R, Zhang V, Hoffmann JP, Kolls JK, Raz E, Brenner DA, Kisseleva T, LeibundGut-Landmann S, Bacher P, Stärkel P, Schnabl B. Candida albicans-specific Th17 cell-mediated response contributes to alcohol-associated liver disease. Cell Host Microbe 2023; 31:389-404.e7. [PMID: 36893735 PMCID: PMC10039706 DOI: 10.1016/j.chom.2023.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/04/2023] [Accepted: 01/31/2023] [Indexed: 03/11/2023]
Abstract
Alcohol-associated liver disease is accompanied by intestinal mycobiome dysbiosis, yet the impacts on liver disease are unclear. We demonstrate that Candida albicans-specific T helper 17 (Th17) cells are increased in circulation and present in the liver of patients with alcohol-associated liver disease. Chronic ethanol administration in mice causes migration of Candida albicans (C. albicans)-reactive Th17 cells from the intestine to the liver. The antifungal agent nystatin decreased C. albicans-specific Th17 cells in the liver and reduced ethanol-induced liver disease in mice. Transgenic mice expressing T cell receptors (TCRs) reactive to Candida antigens developed more severe ethanol-induced liver disease than transgene-negative littermates. Adoptively transferring Candida-specific TCR transgenic T cells or polyclonal C. albicans-primed T cells exacerbated ethanol-induced liver disease in wild-type mice. Interleukin-17 (IL-17) receptor A signaling in Kupffer cells was required for the effects of polyclonal C. albicans-primed T cells. Our findings indicate that ethanol increases C. albicans-specific Th17 cells, which contribute to alcohol-associated liver disease.
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Affiliation(s)
- Suling Zeng
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA; Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Elisa Rosati
- Institute of Immunology & Institute of Clinical Molecular Biology, Christian-Albrechts Universität zu Kiel and Universitätsklinik Schleswig-Holstein, Kiel, Germany
| | - Carina Saggau
- Institute of Immunology & Institute of Clinical Molecular Biology, Christian-Albrechts Universität zu Kiel and Universitätsklinik Schleswig-Holstein, Kiel, Germany
| | - Berith Messner
- Institute of Immunology & Institute of Clinical Molecular Biology, Christian-Albrechts Universität zu Kiel and Universitätsklinik Schleswig-Holstein, Kiel, Germany
| | - Huikuan Chu
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Yi Duan
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Phillipp Hartmann
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA; Department of Pediatrics, University of California, San Diego, La Jolla, CA, USA; Division of Gastroenterology, Hepatology & Nutrition, Rady Children's Hospital San Diego, San Diego, CA, USA
| | - Yanhan Wang
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA; Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Shengyun Ma
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Wendy Jia Men Huang
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Jihyung Lee
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Sung Min Lee
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | | | - Vivian Zhang
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Joseph P Hoffmann
- Center for Translational Research in Infection and Inflammation, Department of Pediatrics and Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Jay K Kolls
- Center for Translational Research in Infection and Inflammation, Department of Pediatrics and Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Eyal Raz
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - David A Brenner
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Tatiana Kisseleva
- Department of Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Salomé LeibundGut-Landmann
- Section of Immunology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland; Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland
| | - Petra Bacher
- Institute of Immunology & Institute of Clinical Molecular Biology, Christian-Albrechts Universität zu Kiel and Universitätsklinik Schleswig-Holstein, Kiel, Germany
| | - Peter Stärkel
- St. Luc University Hospital, Université Catholique de Louvain, Brussels, Belgium
| | - Bernd Schnabl
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA; Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA.
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23
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Zeng S, Hartmann P, Park M, Duan Y, Lang S, Llorente C, Wang Y, Cabré N, Fouts DE, Bacher P, Jung WH, Stärkel P, Schnabl B. Malassezia restricta promotes alcohol-induced liver injury. Hepatol Commun 2023; 7:e0029. [PMID: 36706195 PMCID: PMC9988279 DOI: 10.1097/hc9.0000000000000029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 10/31/2022] [Indexed: 01/29/2023] Open
Abstract
Chronic alcohol consumption is associated with intestinal fungal dysbiosis, yet we understand little about how alterations of intestinal fungi (mycobiota) contribute to the pathogenesis of alcohol-associated liver disease. By reanalyzing internal transcribed spacer 2 amplicon sequencing of fecal samples from a cohort of 66 patients with alcohol use disorder for presence (as opposed to relative abundance) of fungal species, we observed that the presence of Malassezia restricta was associated with increased markers of liver injury. M. restricta exacerbates ethanol-induced liver injury both in acute binge and chronic ethanol-feeding models in mice. Using bone marrow chimeric mice, we found that the disease exacerbating effect by M. restricta was mediated by C-type lectin domain family 4, member N on bone marrow-derived cells. M. restricta induces inflammatory cytokines and chemokines in Kupffer cells through C-type lectin domain family 4, member N signaling. Targeting fungal pathobionts might be a therapeutic strategy for alcohol-associated liver disease.
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Affiliation(s)
- Suling Zeng
- Department of Medicine, University of California San Diego, La Jolla, California, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, California, USA
| | - Phillipp Hartmann
- Department of Medicine, University of California San Diego, La Jolla, California, USA
- Department of Pediatrics, University of California, San Diego, La Jolla, California, USA
- Division of Gastroenterology, Hepatology & Nutrition, Rady Children’s Hospital San Diego, San Diego, California, USA
| | - Minji Park
- Department of Systems Biotechnology, Chung-Ang University, Anseong-Si, Korea
| | - Yi Duan
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Sonja Lang
- Department of Medicine, University of California San Diego, La Jolla, California, USA
- Department of Gastroenterology and Hepatology, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Cristina Llorente
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Yanhan Wang
- Department of Medicine, University of California San Diego, La Jolla, California, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, California, USA
| | - Noemí Cabré
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Derrick E. Fouts
- Genomic Medicine, J. Craig Venter Institute, Rockville, Maryland, USA
| | - Petra Bacher
- Institute of Immunology, Christian-Albrechts-University of Kiel & UKSH Schleswig-Holstein, Kiel, Germany
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Won Hee Jung
- Department of Systems Biotechnology, Chung-Ang University, Anseong-Si, Korea
| | - Peter Stärkel
- St. Luc University Hospital, Université Catholique de Louvain, Brussels, Belgium
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, California, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, California, USA
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24
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Abstract
In recent years, it has become clear that gut microbiota plays a major role in the human body, both in health and disease. Because of that, the gut microbiome and its impact on human well-being are getting wider and wider attention. Studies focused on the liver are not an exception. However, the majority of the analyses are concentrated on the bacterial part of the gut microbiota, while the fungi living in the human intestines are often omitted or underappreciated. This review is focused on the gut mycobiome as an important factor that should be taken into consideration regarding liver homeostasis and its perturbations. We have collected the findings in this field and we discuss their importance. We aim to emphasize the fungal compositional changes related to liver diseases and, by that, provide novel insights into the directions of liver research and gut microbiota as a therapeutic target for liver diseases.
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Affiliation(s)
- Natalia Szóstak
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Marek Figlerowicz
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Anna Philips
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
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25
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Crotty K, Anton P, Coleman LG, Morris NL, Lewis SA, Samuelson DR, McMahan RH, Hartmann P, Kim A, Ratna A, Mandrekar P, Wyatt TA, Choudhry MA, Kovacs EJ, McCullough R, Yeligar SM. A critical review of recent knowledge of alcohol's effects on the immunological response in different tissues. ALCOHOL, CLINICAL & EXPERIMENTAL RESEARCH 2023; 47:36-44. [PMID: 36446606 PMCID: PMC9974783 DOI: 10.1111/acer.14979] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 11/02/2022] [Accepted: 11/15/2022] [Indexed: 11/23/2022]
Abstract
Alcohol misuse contributes to the dysregulation of immune responses and multiorgan dysfunction across various tissues, which are associated with higher risk of morbidity and mortality in people with alcohol use disorders. Organ-specific immune cells, including microglia in the brain, alveolar macrophages in the lungs, and Kupffer cells in the liver, play vital functions in host immune defense through tissue repair and maintenance of homeostasis. However, binge drinking and chronic alcohol misuse impair these immune cells' abilities to regulate inflammatory signaling and metabolism, thus contributing to multiorgan dysfunction. Further complicating these delicate systems, immune cell dysfunction associated with alcohol misuse is exacerbated by aging and gut barrier leakage. This critical review describes recent advances in elucidating the potential mechanisms by which alcohol misuse leads to derangements in host immunity and highlights current gaps in knowledge that may be the focus of future investigations.
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Affiliation(s)
- Kathryn Crotty
- Department of Medicine, Emory University, Atlanta, Georgia, USA
- Atlanta Veterans Affairs Health Care System, Decatur, Georgia, USA
| | - Paige Anton
- Department of Pharmaceutical Sciences, University of Colorado, Aurora, Colorado, USA
- Alcohol Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Leon G Coleman
- Department of Pharmacology, Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Niya L Morris
- Department of Medicine, Emory University, Atlanta, Georgia, USA
- Atlanta Veterans Affairs Health Care System, Decatur, Georgia, USA
| | - Sloan A Lewis
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California, USA
| | - Derrick R Samuelson
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Rachel H McMahan
- Alcohol Research Program, University of Colorado Denver, Aurora, Colorado, USA
- Department of Surgery, University of Colorado, Aurora, Colorado, USA
| | - Phillipp Hartmann
- Department of Pediatrics, University of California San Diego, La Jolla, California, USA
| | - Adam Kim
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Anuradha Ratna
- Department of Medicine, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Pranoti Mandrekar
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Todd A Wyatt
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska, USA
| | - Mashkoor A Choudhry
- Alcohol Research Program, Department of Surgery, Burn and Shock Trauma Research Institute, Loyola University Chicago, Maywood, Illinois, USA
| | - Elizabeth J Kovacs
- Alcohol Research Program, University of Colorado Denver, Aurora, Colorado, USA
- Department of Surgery, University of Colorado, Aurora, Colorado, USA
- Rocky Mountain Regional Veterans Affairs (VA) Medical Center, Aurora, Colorado, USA
| | - Rebecca McCullough
- Department of Pharmaceutical Sciences, University of Colorado, Aurora, Colorado, USA
- Alcohol Research Program, University of Colorado Denver, Aurora, Colorado, USA
| | - Samantha M Yeligar
- Department of Medicine, Emory University, Atlanta, Georgia, USA
- Atlanta Veterans Affairs Health Care System, Decatur, Georgia, USA
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26
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Gelli A, Nobile CJ, Pericolini E, Wellington M. Editorial: Women in fungal pathogenesis 2021. Front Cell Infect Microbiol 2022; 12:1068446. [PMID: 36405971 PMCID: PMC9672804 DOI: 10.3389/fcimb.2022.1068446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
- Angie Gelli
- Department of Pharmacology, School of Medicine, University of California, Davis, Davis, CA, United States
- *Correspondence: Angie Gelli,
| | - Clarissa J. Nobile
- Department of Molecular and Cell Biology, School of Natural Sciences, University of California, Merced, Merced, CA, United States
- Health Sciences Research Institute, University of California, Merced, Merced, CA, United States
| | - Eva Pericolini
- Department of Surgical, Medical, Dental and Morphological Sciences with Interest in Transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Melanie Wellington
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA, United States
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27
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Osna NA, Rasineni K, Ganesan M, Donohue TM, Kharbanda KK. Pathogenesis of Alcohol-Associated Liver Disease. J Clin Exp Hepatol 2022; 12:1492-1513. [PMID: 36340300 PMCID: PMC9630031 DOI: 10.1016/j.jceh.2022.05.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 05/25/2022] [Indexed: 12/12/2022] Open
Abstract
Excessive alcohol consumption is a global healthcare problem with enormous social, economic, and clinical consequences. While chronic, heavy alcohol consumption causes structural damage and/or disrupts normal organ function in virtually every tissue of the body, the liver sustains the greatest damage. This is primarily because the liver is the first to see alcohol absorbed from the gastrointestinal tract via the portal circulation and second, because the liver is the principal site of ethanol metabolism. Alcohol-induced damage remains one of the most prevalent disorders of the liver and a leading cause of death or transplantation from liver disease. Despite extensive research on the pathophysiology of this disease, there are still no targeted therapies available. Given the multifactorial mechanisms for alcohol-associated liver disease pathogenesis, it is conceivable that a multitherapeutic regimen is needed to treat different stages in the spectrum of this disease.
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Key Words
- AA, Arachidonic acid
- ADH, Alcohol dehydrogenase
- AH, Alcoholic hepatitis
- ALD, Alcohol-associated liver disease
- ALDH, Aldehyde dehydrogenase
- ALT, Alanine transaminase
- ASH, Alcohol-associated steatohepatitis
- AST, Aspartate transaminase
- AUD, Alcohol use disorder
- BHMT, Betaine-homocysteine-methyltransferase
- CD, Cluster of differentiation
- COX, Cycloxygenase
- CTLs, Cytotoxic T-lymphocytes
- CYP, Cytochrome P450
- CYP2E1, Cytochrome P450 2E1
- Cu/Zn SOD, Copper/zinc superoxide dismutase
- DAMPs, Damage-associated molecular patterns
- DC, Dendritic cells
- EDN1, Endothelin 1
- ER, Endoplasmic reticulum
- ETOH, Ethanol
- EVs, Extracellular vesicles
- FABP4, Fatty acid-binding protein 4
- FAF2, Fas-associated factor family member 2
- FMT, Fecal microbiota transplant
- Fn14, Fibroblast growth factor-inducible 14
- GHS-R1a, Growth hormone secretagogue receptor type 1a
- GI, GOsteopontinastrointestinal tract
- GSH Px, Glutathione peroxidase
- GSSG Rdx, Glutathione reductase
- GST, Glutathione-S-transferase
- GWAS, Genome-wide association studies
- H2O2, Hydrogen peroxide
- HA, Hyaluronan
- HCC, Hepatocellular carcinoma
- HNE, 4-hydroxynonenal
- HPMA, 3-hydroxypropylmercapturic acid
- HSC, Hepatic stellate cells
- HSD17B13, 17 beta hydroxy steroid dehydrogenase 13
- HSP 90, Heat shock protein 90
- IFN, Interferon
- IL, Interleukin
- IRF3, Interferon regulatory factor 3
- JAK, Janus kinase
- KC, Kupffer cells
- LCN2, Lipocalin 2
- M-D, Mallory–Denk
- MAA, Malondialdehyde-acetaldehyde protein adducts
- MAT, Methionine adenosyltransferase
- MCP, Macrophage chemotactic protein
- MDA, Malondialdehyde
- MIF, Macrophage migration inhibitory factor
- Mn SOD, Manganese superoxide dismutase
- Mt, Mitochondrial
- NK, Natural killer
- NKT, Natural killer T-lymphocytes
- OPN, Osteopontin
- PAMP, Pathogen-associated molecular patterns
- PNPLA3, Patatin-like phospholipase domain containing 3
- PUFA, Polyunsaturated fatty acid
- RIG1, Retinoic acid inducible gene 1
- SAH, S-adenosylhomocysteine
- SAM, S-adenosylmethionine
- SCD, Stearoyl-CoA desaturase
- STAT, Signal transduction and activator of transcription
- TIMP1, Tissue inhibitor matrix metalloproteinase 1
- TLR, Toll-like receptor
- TNF, Tumor necrosis factor-α
- alcohol
- alcohol-associated liver disease
- ethanol metabolism
- liver
- miRNA, MicroRNA
- p90RSK, 90 kDa ribosomal S6 kinase
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Affiliation(s)
- Natalia A. Osna
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
- Department of Internal Medicine, Omaha, NE, 68198, USA
| | - Karuna Rasineni
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
- Department of Internal Medicine, Omaha, NE, 68198, USA
| | - Murali Ganesan
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
- Department of Internal Medicine, Omaha, NE, 68198, USA
| | - Terrence M. Donohue
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
- Department of Internal Medicine, Omaha, NE, 68198, USA
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Kusum K. Kharbanda
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
- Department of Internal Medicine, Omaha, NE, 68198, USA
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
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28
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Hartmann P, Schnabl B. Inexpensive, Accurate, and Stable Method to Quantitate Blood Alanine Aminotransferase (ALT) Levels. Methods Protoc 2022; 5:81. [PMID: 36287053 PMCID: PMC9610295 DOI: 10.3390/mps5050081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/04/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2022] Open
Abstract
Alanine aminotransferase (ALT) levels are frequently determined in serum and plasma samples and are a primary measure to quantitate hepatocellular injury in rodents, humans, and other organisms. An accurate, reliable, and scalable assay is hence of central importance. Here, we describe a methodology that fulfills those requirements, and demonstrates an excellent performance similar to a commercial ALT kit, with a long stable performance over several subsequent runs. Further, anticoagulation of blood samples with ethylenediaminetetraacetic acid (EDTA) or heparin results in similar ALT concentrations with this assay, whereas no anticoagulation significantly increases ALT levels. Mild hemolysis does not significantly increase ALT levels; however, moderate to severe hemolysis does lead to higher ALT levels. The assay provides stable results over a wide range of associated triglyceride concentrations that can be expected in serum and plasma samples from rodents and humans with dyslipidemia. It also performs well in diluted samples with a reduction of ALT levels corresponding to the factor used to dilute the samples. The described ALT reagent is also very affordable, costing less than 1/80 of comparable commercial kits. Based on the characteristics above, this methodology is suitable for a broad spectrum of applications in mice and possibly humans, where ALT concentrations need to be determined.
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Affiliation(s)
- Phillipp Hartmann
- Department of Pediatrics, University of California San Diego, La Jolla, CA 92093-0984, USA
- Division of Gastroenterology, Hepatology & Nutrition, Rady Children’s Hospital San Diego, San Diego, CA 92123-5030, USA
- Department of Medicine, University of California San Diego, La Jolla, CA 92093-0063, USA
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA 92093-0063, USA
- Department of Medicine, VA San Diego Healthcare System, San Diego, CA 92161-0002, USA
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29
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Hou X, Rong C, Zhang Q, Song S, Cong Y, Zhang HT. Cyclic Nucleotide Phosphodiesterases in Alcohol Use Disorders: Involving Gut Microbiota. Int J Neuropsychopharmacol 2022; 26:70-79. [PMID: 36087271 PMCID: PMC9850663 DOI: 10.1093/ijnp/pyac060] [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: 12/27/2021] [Revised: 08/18/2022] [Accepted: 09/09/2022] [Indexed: 01/22/2023] Open
Abstract
Alcohol abuse is 1 of the most significant public health problems in the world. Chronic, excessive alcohol consumption not only causes alcohol use disorder (AUD) but also changes the gut and lung microbiota, including bacterial and nonbacterial types. Both types of microbiota can release toxins, further damaging the gastrointestinal and respiratory tracts; causing inflammation; and impairing the functions of the liver, lung, and brain, which in turn deteriorate AUD. Phosphodiesterases (PDEs) are critical in the control of intracellular cyclic nucleotides, including cyclic adenosine monophosphate and cyclic guanosine monophosphate. Inhibition of certain host PDEs reduces alcohol consumption and attenuates alcohol-related impairment. These PDEs are also expressed in the microbiota and may play a role in controlling microbiota-associated inflammation. Here, we summarize the influences of alcohol on gut/lung bacterial and nonbacterial microbiota as well as on the gut-liver/brain/lung axis. We then discuss the relationship between gut and lung microbiota-mediated PDE signaling and AUD consequences in addition to highlighting PDEs as potential targets for treatment of AUD.
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Affiliation(s)
- Xueqin Hou
- Correspondence: Xueqin Hou, PhD, Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China ()
| | | | - Qiwei Zhang
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Shuangshuang Song
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Yifan Cong
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Han-Ting Zhang
- Han-Ting Zhang, MD, PhD, Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, Shandong 266073, P.R. China ()
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30
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Philips CA, Schnabl B, Bajaj JS. Gut Microbiome and Alcohol-associated Liver Disease. J Clin Exp Hepatol 2022; 12:1349-1359. [PMID: 36157139 PMCID: PMC9499847 DOI: 10.1016/j.jceh.2021.12.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 12/28/2021] [Indexed: 02/07/2023] Open
Abstract
Changes in gut microbiota (GM) may be associated with the causation and progression of multiple liver diseases such as metabolic-associated liver disease, alcohol-associated liver disease (ALD), alcohol-associated hepatitis (AH), primary biliary cholangitis, primary sclerosing cholangitis, autoimmune liver disease, and most importantly, complications of cirrhosis and portal hypertension such as hepatic encephalopathy (HE), infection, and hepatocellular carcinoma. ALD includes simple steatosis, steatohepatitis, AH, cirrhosis, and acute-on-chronic liver failure. Alcohol consumption is associated with GM changes even before ALD development, and continued alcohol intake results in progressive dysbiosis and development of clinical events such as AH, infection, and HE. The composition and function of GM, specific changes in bacterial communities, and the functional metabolism of GM are affected in the spectrum of ALD, as revealed using high-throughput sequencing. It was reported in preliminary studies that modulation of disrupted GM improves adverse clinical events and ameliorates disease progression in ALD. In this review, we exhaustively discuss the preclinical and clinical studies on GM in ALD and critically discuss GM modulation and its effects based on various human and animal models of ALD.
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Key Words
- ACLF
- ACLF, acute on chronic liver failure
- AH, alcohol-associated hepatitis
- ALD
- ALD, alcohol-associated liver disease
- AUD, alcohol use disorder
- FMT
- FMT, fecal microbiota transplantation
- GM, gut microbiota
- HE, hepatic encephalopathy
- IL, interleukin
- MAFLD, metabolic-associated fatty liver disease
- SCFA, short chain fatty acids
- cirrhosis
- microbiome
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Affiliation(s)
- Cyriac A. Philips
- Department of Clinical and Translational Hepatology and The Monarch Liver Laboratory, The Liver Institute, Center for Excellence in Gastrointestinal Sciences, Rajagiri Hospital, Aluva, Kerala, India
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Jasmohan S. Bajaj
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Internal Medicine, Virginia Commonwealth University and Central Virginia Veterans Healthcare System, Richmond, VA, USA
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31
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Hsu CL, Zhang X, Jiang L, Lang S, Hartmann P, Pride D, Fouts DE, Stärkel P, Schnabl B. Intestinal virome in patients with alcohol use disorder and after abstinence. Hepatol Commun 2022; 6:2058-2069. [PMID: 35368152 PMCID: PMC9315129 DOI: 10.1002/hep4.1947] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/22/2022] [Accepted: 03/11/2022] [Indexed: 02/06/2023] Open
Abstract
Alcohol use is a leading cause of chronic liver disease worldwide, and changes in the microbiome associated with alcohol use contribute to patients' risk for liver disease progression. Less is known about the effects of alcohol use on the intestinal viral microbiome (virome) and interactions between bacteriophages and their target bacteria. We studied changes in the intestinal virome of 62 clinically well-characterized patients with alcohol use disorder (AUD) during active alcohol use and after 2 weeks of alcohol abstinence, by extracting virus-like particles and performing metagenomic sequencing. We observed decreased abundance of Propionibacterium, Lactobacillus, and Leuconostoc phages in patients with active AUD when compared with controls, whereas after 2 weeks of alcohol abstinence, patients with AUD demonstrated an increase in the abundance of Propionibacterium, Lactobacillus, and Leuconostoc phages. The intestinal virome signature was also significantly different in patients with AUD with progressive liver disease, with increased abundance of phages targeting Enterobacteria and Lactococcus species phages compared with patients with AUD with nonprogressive liver disease. By performing moderation analyses, we found that progressive liver disease is associated with changes in interactions between some bacteriophages and their respective target bacteria. In summary, active alcohol use and alcohol-associated progressive liver disease are associated with changes in the fecal virome, some of which are partially reversible after a short period of abstinence. Progression of alcohol-associated liver disease is associated with changes in bacteriophage-bacteria interactions.
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Affiliation(s)
- Cynthia L Hsu
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA
| | - Xinlian Zhang
- Division of Biostatistics and BioinformaticsDepartment of Family Medicine and Public HealthUniversity of California San DiegoLa JollaCaliforniaUSA
| | - Lu Jiang
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA.,Department of MedicineVA San Diego Healthcare SystemSan DiegoCaliforniaUSA
| | - Sonja Lang
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA.,Department of Gastroenterology and HepatologyFaculty of MedicineUniversity of CologneUniversity Hospital CologneCologneGermany
| | - Phillipp Hartmann
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA.,Department of PediatricsUniversity of California San DiegoLa JollaCaliforniaUSA
| | - David Pride
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA.,Department of PathologyUniversity of California San DiegoLa JollaCaliforniaUSA.,Center for Innovative Phage Applications and TherapeuticsUniversity of California San DiegoLa JollaCaliforniaUSA
| | | | - Peter Stärkel
- St. Luc University HospitalCatholic University of LouvainBrusselsBelgium
| | - Bernd Schnabl
- Department of MedicineUniversity of California San DiegoLa JollaCaliforniaUSA.,Department of MedicineVA San Diego Healthcare SystemSan DiegoCaliforniaUSA.,Center for Innovative Phage Applications and TherapeuticsUniversity of California San DiegoLa JollaCaliforniaUSA
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32
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Cheng Z, Yang L, Chu H. The Gut Microbiota: A Novel Player in Autoimmune Hepatitis. Front Cell Infect Microbiol 2022; 12:947382. [PMID: 35899041 PMCID: PMC9310656 DOI: 10.3389/fcimb.2022.947382] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/20/2022] [Indexed: 11/25/2022] Open
Abstract
Autoimmune hepatitis (AIH) is a chronic immune-mediated liver disease distributed globally in all ethnicities with increasing prevalence. If left untreated, the disease will lead to cirrhosis, liver failure, or death. The intestinal microbiota is a complex ecosystem located in the human intestine, which extensively affects the human physiological and pathological processes. With more and more in-depth understandings of intestinal microbiota, a substantial body of studies have verified that the intestinal microbiota plays a crucial role in a variety of digestive system diseases, including alcohol-associated liver disease (ALD) and non-alcoholic fatty liver disease (NAFLD). However, only a few studies have paid attention to evaluate the relationship between AIH and the intestinal microbiota. While AIH pathogenesis is not fully elucidated yet, some studies have indicated that intestinal microbiota putatively made significant contributions to the occurrence and the development of AIH by triggering several specific signaling pathways, altering the metabolism of intestinal microbiota, as well as modulating the immune response in the intestine and liver. By collecting the latest related literatures, this review summarized the increasing trend of the aerobic bacteria abundance in both AIH patients and AIH mice models. Moreover, the combination of specific bacteria species was found distinct to AIH patients, which could be a promising tool for diagnosing AIH. In addition, there were alterations of luminal metabolites and immune responses, including decreased short-chain fatty acids (SCFAs), increased pathogen associated molecular patterns (PAMPs), imbalanced regulatory T (Treg)/Th17 cells, follicular regulatory T (TFR)/follicular helper T (TFH) cells, and activated natural killer T (NKT) cells. These alterations participate in the onset and the progression of AIH via multiple mechanisms. Therefore, some therapeutic methods based on restoration of intestinal microbiota composition, including probiotics and fecal microbiota transplantation (FMT), as well as targeted intestinal microbiota-associated signaling pathways, confer novel insights into the treatment for AIH patients.
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Affiliation(s)
| | - Ling Yang
- *Correspondence: Huikuan Chu, ; Ling Yang, ;
| | - Huikuan Chu
- *Correspondence: Huikuan Chu, ; Ling Yang, ;
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33
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Hasa E, Hartmann P, Schnabl B. Liver cirrhosis and immune dysfunction. Int Immunol 2022; 34:455-466. [PMID: 35792761 PMCID: PMC9447994 DOI: 10.1093/intimm/dxac030] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 06/27/2022] [Indexed: 01/05/2023] Open
Abstract
Cirrhosis is end-stage liver disease resulting from various etiologies and is a common cause of death worldwide. The progression from compensated to decompensated cirrhosis to acute-on-chronic liver failure (ACLF) is due to multiple factors, including continuation of alcohol use or continued exposure to other toxins, an imbalance of the gut microbiota (dysbiosis), increased gut permeability and a disrupted immune response. This disrupted immune response is also named cirrhosis-associated immune dysfunction, which is characterized by worsening systemic inflammation with concomitant immune paralysis, as liver disease deteriorates. This review highlights central immunologic events during the exacerbation of cirrhosis and characterizes the different immune cell populations involved therein.
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34
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Yu J, Guo M, Jiang W, Dao Y, Pang X. Illumina-Based Analysis Yields New Insights Into the Fungal Contamination Associated With the Processed Products of Crataegi Fructus. Front Nutr 2022; 9:883698. [PMID: 35634418 PMCID: PMC9135361 DOI: 10.3389/fnut.2022.883698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/13/2022] [Indexed: 12/12/2022] Open
Abstract
Crataegi Fructus, a medicinal and edible herb in China, has been considered a popular dietary supplement globally. It is used for the treatment of dyspepsia and chronic heart failure according to the Chinese Pharmacopoeia (2020). However, fungal contamination in Crataegi Fructus affects its quality and safety, thus preventing its global promotion. In this study, we comprehensively studied the fungal community in processed products of Crataegi Fructus by high-throughput sequencing. A total of 21 Crataegi Fructus samples were collected from five provinces in China, and the samples were divided into five groups based on collection areas, as well as into three groups based on processing methods. We then targeted the internal transcribed spacer 2 sequence through the Illumina Miseq PE300 platform to investigate fungal composition and diversity. Results showed that all 21 samples were detected with fungal contamination, and Ascomycota was dominant at the phylum level. In the groups based on collection areas, Dothideomycetes, Pleosporaceae, and Alternaria were dominant at the class, family, and genus levels, respectively. In the groups based on processing methods, Dothideomycetes, Aspergillaceae, and Alternaria were the most abundant at the class, family, and genus levels, respectively. Differences in fungal communities between various groups were also observed. Furthermore, a total of 115 species were identified, among which seven were potential toxigenic, namely, Trichothecium roseum, Alternaria tenuissima, Aspergillus carbonarius, Penicillium brevicompactum, Aspergillus fumigatus, Rhizopus microspores, and Pichia fermentans. In conclusion, this study reveals great fungal richness and diversity of Crataegi Fructus, providing references for the prevention and control of fungal contamination of Crataegi Fructus in practical production.
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35
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Swidergall M, LeibundGut-Landmann S. Immunosurveillance of Candida albicans commensalism by the adaptive immune system. Mucosal Immunol 2022; 15:829-836. [PMID: 35778599 PMCID: PMC9385492 DOI: 10.1038/s41385-022-00536-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/27/2022] [Accepted: 05/31/2022] [Indexed: 02/04/2023]
Abstract
The fungal microbiota (mycobiota) is an integral part of the microbial community colonizing the body surfaces and is involved in many key aspects of human physiology, while an imbalance of the fungal communities, termed fungal dysbiosis, has been described in pathologies ranging from infections to inflammatory bowel disease. Commensal organisms, such as the fungus Candida albicans, induce antigen-specific immune responses that maintain immune homeostasis. Adaptive immune mechanisms are vital in this process, while deficiencies in adaptive immunity are linked to fungal infections. We start to understand the mechanisms by which a shift in mycobiota composition, in particular in C. albicans abundance, is linked to immunopathological conditions. This review discusses the mechanisms that ensure continuous immunosurveillance of C. albicans during mucosal colonization, how these protective adaptive immune responses can also promote immunopathology, and highlight therapeutic advances against C. albicans-associated disease.
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Affiliation(s)
- Marc Swidergall
- Division of Infectious Diseases, Harbor-UCLA Medical Center, Torrance, CA, USA
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, USA
- David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Salomé LeibundGut-Landmann
- Section of Immunology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland.
- Institute of Experimental Immunology, University of Zürich, Zürich, Switzerland.
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36
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Gupta B, Rai R, Oertel M, Raeman R. Intestinal Barrier Dysfunction in Fatty Liver Disease: Roles of Microbiota, Mucosal Immune System, and Bile Acids. Semin Liver Dis 2022; 42:122-137. [PMID: 35738255 PMCID: PMC9307091 DOI: 10.1055/s-0042-1748037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) describes a spectrum of progressive liver diseases ranging from simple steatosis to steatohepatitis and fibrosis. Globally, NAFLD is the leading cause of morbidity and mortality associated with chronic liver disease, and NAFLD patients are at a higher risk of developing cirrhosis and hepatocellular carcinoma. While there is a consensus that inflammation plays a key role in promoting NAFLD progression, the underlying mechanisms are not well understood. Recent clinical and experimental evidence suggest that increased hepatic translocation of gut microbial antigens, secondary to diet-induced impairment of the intestinal barrier may be important in driving hepatic inflammation in NAFLD. Here, we briefly review various endogenous and exogenous factors influencing the intestinal barrier and present recent advances in our understanding of cellular and molecular mechanisms underlying intestinal barrier dysfunction in NAFLD.
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Affiliation(s)
- Biki Gupta
- Division of Experimental Pathology, Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ravi Rai
- Division of Experimental Pathology, Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Michael Oertel
- Division of Experimental Pathology, Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania,Pittsburgh Liver Research Center, University of Pittsburgh Medical Center and University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania,McGowan Institute for Regenerative Medicine, University of Pittsburgh Medical Center and University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Reben Raeman
- Division of Experimental Pathology, Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania,Pittsburgh Liver Research Center, University of Pittsburgh Medical Center and University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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37
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Hartmann P. Editorial: The Microbiome in Hepatobiliary and Intestinal Disease. Front Physiol 2022; 13:893074. [PMID: 35492588 PMCID: PMC9044070 DOI: 10.3389/fphys.2022.893074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Affiliation(s)
- Phillipp Hartmann
- Department of Pediatrics, University of California, San Diego, San Diego, CA, United States
- Division of Gastroenterology, Hepatology and Nutrition, Rady Children’s Hospital San Diego, San Diego, CA, United States
- *Correspondence: Phillipp Hartmann,
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38
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Zeng S, Schnabl B. Roles for the mycobiome in liver disease. Liver Int 2022; 42:729-741. [PMID: 34995410 PMCID: PMC8930708 DOI: 10.1111/liv.15160] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/17/2021] [Accepted: 12/30/2021] [Indexed: 12/14/2022]
Abstract
Liver disease, a major cause of global mortality, has been associated with dysbiosis of the intestinal microbiota (bacteria, fungi, viruses, and other microbes). Studies have associated changes in gut bacteria with pathogenesis and severity of liver disease, but the contributions of the mycobiome (the fungal populations of the gut) to health and disease have not been well studied. We review recent findings of alterations in the composition of the mycobiota in patients with liver disease and discuss the mechanisms by which these might affect pathogenesis and disease progression. Strategies to manipulate the gut mycobiota might be developed to treat or prevent liver disease.
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Affiliation(s)
- Suling Zeng
- Department of Medicine, University of California San Diego, La Jolla, CA, USA,Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA,Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
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39
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Day AW, Kumamoto CA. Gut Microbiome Dysbiosis in Alcoholism: Consequences for Health and Recovery. Front Cell Infect Microbiol 2022; 12:840164. [PMID: 35310839 PMCID: PMC8928144 DOI: 10.3389/fcimb.2022.840164] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/09/2022] [Indexed: 12/12/2022] Open
Abstract
Since the mid 1980's, the impact of gastrointestinal (GI) microbiome changes during alcohol use disorder has been an area of significant interest. This work has resulted in the identification of specific changes in the abundance of certain members of the GI microbiome and the role these changes play in a variety of alcohol related disorders (i.e. alcoholic liver disease). Interestingly, some findings suggest a possible role for the GI microbiome in alcohol addiction or withdrawal. Unfortunately, there is a significant gap in knowledge in this area. Here we describe differences in the GI microbiome of alcoholic and non-alcoholic individuals and discuss the possible impact of microbes on the gut-brain axis, which could impact alcohol related behaviors (i.e. addiction). Understanding the role of the GI microbiome in alcohol related disorders will potentially lead to the development of successful microbiome-targeted therapeutics to help mitigate these disorders.
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Affiliation(s)
- Andrew Whittier Day
- Graduate School of Biomedical Sciences, Tufts University, Boston, MA, United States
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Carol A. Kumamoto
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
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40
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Chen L, Zhu Y, Hou X, Yang L, Chu H. The Role of Gut Bacteria and Fungi in Alcohol-Associated Liver Disease. Front Med (Lausanne) 2022; 9:840752. [PMID: 35308525 PMCID: PMC8927088 DOI: 10.3389/fmed.2022.840752] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/31/2022] [Indexed: 12/12/2022] Open
Abstract
Cirrhosis and liver cancer caused by alcohol-associated liver disease (ALD) are serious threats to people's health. In addition to hepatic cell apoptosis and liver inflammation caused by oxidative stress during alcohol metabolism, intestinal microbiota disorders are also involved in the onset and development of ALD. Ethanol and its' oxidative and non-oxidative metabolites, together with dysbiosis-caused-inflammation, destroys the intestinal barrier. Changes of several microbial metabolites, such as bile acids, short-chain fatty acids, and amino acid, are closely associated with gut dysbiosis in ALD. The alcohol-caused dysbiosis can further influence intestinal barrier-related proteins, such as mucin2, bile acid-related receptors, and aryl hydrocarbon receptor (AhR), and these abnormal changes also participate in the injury of the intestinal barrier and hepatic steatosis. Gut-derived bacteria, fungi, and their toxins, such as lipopolysaccharide (LPS) and β-glucan translocate into the liver through the damaged intestinal barrier and promote the progression of inflammation and fibrosis of ALD. Thus, the prevention of alcohol-induced disruption of intestinal permeability has a beneficial effect on ALD. Currently, multiple therapeutic treatments have been applied to restore the gut microbiota of patients with ALD. Fecal microbial transplantation, probiotics, antibiotics, and many other elements has already shown their ability of restoring the gut microbiota. Targeted approaches, such as using bacteriophages to remove cytolytic Enterococcus faecalis, and supplement with Lactobacillus, Bifidobacterium, or boulardii are also powerful therapeutic options for ALD.
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Affiliation(s)
- Liuying Chen
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yixin Zhu
- Department of Medicine, University of California, San Diego, San Diego, CA, United States
| | - Xiaohua Hou
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Xiaohua Hou
| | - Ling Yang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Ling Yang
| | - Huikuan Chu
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Huikuan Chu
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41
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Abstract
Intestinal microbiota, dominated by bacteria, plays an important role in the occurrence and the development of alcohol-associated liver disease (ALD), which is one of the most common liver diseases around the world. With sufficient studies focusing on the gut bacterial community, chronic alcohol consumption is now known as a key factor that alters the composition of gut bacterial community, increases intestinal permeability, causes intestinal dysfunction, induces bacterial translocation, and exacerbates the process of ALD via gut-liver axis. However, gut non-bacterial communities including fungi, viruses, and archaea, which may also participate in the disease, has received little attention relative to the gut bacterial community. This paper will systematically collect the latest literatures reporting non-bacterial communities in mammalian health and disease, and review their mechanisms in promoting the development of ALD including CLEC7A pathway, Candidalysin (a peptide toxin secreted by Candida albicans), metabolites, and other chemical substances secreted or regulated by gut commensal mycobiome, virome, and archaeome, hoping to bring novel insights on our current knowledge of ALD.
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Affiliation(s)
- Wenkang Gao
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yixin Zhu
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Jin Ye
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huikuan Chu
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,CONTACT Huikuan Chu Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, 430022, China
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42
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Schnabl B, Arteel GE, Stickel F, Hengstler J, Vartak N, Ghallab A, Dooley S, Li Y, Schwabe RF. Liver specific, systemic and genetic contributors to alcohol-related liver disease progression. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2022; 60:36-44. [PMID: 35042252 PMCID: PMC8941985 DOI: 10.1055/a-1714-9330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Alcohol-related liver disease (ALD) impacts millions of patients worldwide each year and the numbers are increasing. Disease stages range from steatosis via steatohepatitis and fibrosis to cirrhosis, severe alcohol-associated hepatitis and liver cancer. ALD is usually diagnosed at an advanced stage of progression with no effective therapies. A major research goal is to improve diagnosis, prognosis and also treatments for early ALD. This however needs prioritization of this disease for financial investment in basic and clinical research to more deeply investigate mechanisms and identify biomarkers and therapeutic targets for early detection and intervention. Topics of interest are communication of the liver with other organs of the body, especially the gut microbiome, the individual genetic constitution, systemic and liver innate inflammation, including bacterial infections, as well as fate and number of hepatic stellate cells and the composition of the extracellular matrix in the liver. Additionally, mechanical forces and damaging stresses towards the sophisticated vessel system of the liver, including the especially equipped sinusoidal endothelium and the biliary tract, work together to mediate hepatocytic import and export of nutritional and toxic substances, adapting to chronic liver disease by morphological and functional changes. All the aforementioned parameters contribute to the outcome of alcohol use disorder and the risk to develop advanced disease stages including cirrhosis, severe alcoholic hepatitis and liver cancer. In the present collection, we summarize current knowledge on these alcohol-related liver disease parameters, excluding the aspect of inflammation, which is presented in the accompanying review article by Lotersztajn and colleagues.
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Affiliation(s)
- Bernd Schnabl
- Department of Medicine, University of California San Diego, La Jolla, CA, USA,Department of Medicine, VA San Diego Healthcare System, San Diego, CA, USA
| | - Gavin E. Arteel
- Department of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh, Pittsburgh, PA 15213, USA,Pittsburgh Liver Research Center and University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Felix Stickel
- Pittsburgh Liver Research Center and University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Jan Hengstler
- Systems Toxicology, Leibniz Research Centre for Working Environment and Human Factors at the Technical University Dortmund, Dortmund, Germany
| | - Nachiket Vartak
- Systems Toxicology, Leibniz Research Centre for Working Environment and Human Factors at the Technical University Dortmund, Dortmund, Germany
| | - Ahmed Ghallab
- Systems Toxicology, Leibniz Research Centre for Working Environment and Human Factors at the Technical University Dortmund, Dortmund, Germany
| | - Steven Dooley
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Yujia Li
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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43
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Analyzing the human gut mycobiome – a short guide for beginners. Comput Struct Biotechnol J 2022; 20:608-614. [PMID: 35116136 PMCID: PMC8790610 DOI: 10.1016/j.csbj.2022.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 01/04/2022] [Accepted: 01/08/2022] [Indexed: 12/30/2022] Open
Abstract
The human body is a dynamic ecosystem consisting of millions of microbes which are often comprised under the term microbiome. Compared to bacteria, which count for the overwhelming majority of the microbiome, the number of human-associated fungi is small and often underestimated. Nonetheless, they can be found in different host niches such as the gut, the oral cavity and the skin. The fungal community has several potential roles in health and disease of the human host. In this review we will focus on intestinal fungi and their interaction with the host as well as bacteria. We also summarize technical challenges and possible biases researchers must be aware of when conducting mycobiome analysis.
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44
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Rolling T, Zhai B, Frame J, Hohl TM, Taur Y. Customization of a dada2-based pipeline for fungal internal transcribed spacer 1 (ITS 1) amplicon datasets. JCI Insight 2021; 7:151663. [PMID: 34813499 PMCID: PMC8765055 DOI: 10.1172/jci.insight.151663] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Identification and analysis of fungal communities commonly rely on internal transcribed spacer–based (ITS-based) amplicon sequencing. There is no gold standard used to infer and classify fungal constituents since methodologies have been adapted from analyses of bacterial communities. To achieve high-resolution inference of fungal constituents, we customized a DADA2-based pipeline using a mix of 11 medically relevant fungi. While DADA2 allowed the discrimination of ITS1 sequences differing by single nucleotides, quality filtering, sequencing bias, and database selection were identified as key variables determining the accuracy of sample inference. Due to species-specific differences in sequencing quality, default filtering settings removed most reads that originated from Aspergillus species, Saccharomyces cerevisiae, and Candida glabrata. By fine-tuning the quality filtering process, we achieved an improved representation of the fungal communities. By adapting a wobble nucleotide in the ITS1 forward primer region, we further increased the yield of S. cerevisiae and C. glabrata sequences. Finally, we showed that a BLAST-based algorithm based on the UNITE+INSD or the NCBI NT database achieved a higher reliability in species-level taxonomic annotation compared with the naive Bayesian classifier implemented in DADA2. These steps optimized a robust fungal ITS1 sequencing pipeline that, in most instances, enabled species-level assignment of community members.
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Affiliation(s)
- Thierry Rolling
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, United States of America
| | - Bing Zhai
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, United States of America
| | - John Frame
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, United States of America
| | - Tobias M Hohl
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, United States of America
| | - Ying Taur
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, United States of America
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