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Hellen DJ, Fay ME, Lee DH, Klindt-Morgan C, Bennett A, Pachura KJ, Grakoui A, Huppert SS, Dawson PA, Lam WA, Karpen SJ. BiliQML: a supervised machine-learning model to quantify biliary forms from digitized whole slide liver histopathological images. Am J Physiol Gastrointest Liver Physiol 2024; 327:G1-G15. [PMID: 38651949 PMCID: PMC11376979 DOI: 10.1152/ajpgi.00058.2024] [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: 02/22/2024] [Revised: 04/03/2024] [Accepted: 04/09/2024] [Indexed: 04/25/2024]
Abstract
The progress of research focused on cholangiocytes and the biliary tree during development and following injury is hindered by limited available quantitative methodologies. Current techniques include two-dimensional standard histological cell-counting approaches, which are rapidly performed, error prone, and lack architectural context or three-dimensional analysis of the biliary tree in opacified livers, which introduce technical issues along with minimal quantitation. The present study aims to fill these quantitative gaps with a supervised machine-learning model (BiliQML) able to quantify biliary forms in the liver of anti-keratin 19 antibody-stained whole slide images. Training utilized 5,019 researcher-labeled biliary forms, which following feature selection, and algorithm optimization, generated an F score of 0.87. Application of BiliQML on seven separate cholangiopathy models [genetic (Afp-CRE;Pkd1l1null/Fl, Alb-CRE;Rbp-jkfl/fl, and Albumin-CRE;ROSANICD), surgical (bile duct ligation), toxicological (3,5-diethoxycarbonyl-1,4-dihydrocollidine), and therapeutic (Cyp2c70-/- with ileal bile acid transporter inhibition)] allowed for a means to validate the capabilities and utility of this platform. The results from BiliQML quantification revealed biological and pathological differences across these seven diverse models, indicating a highly sensitive, robust, and scalable methodology for the quantification of distinct biliary forms. BiliQML is the first comprehensive machine-learning platform for biliary form analysis, adding much-needed morphologic context to standard immunofluorescence-based histology, and provides clinical and basic science researchers with a novel tool for the characterization of cholangiopathies.NEW & NOTEWORTHY BiliQML is the first comprehensive machine-learning platform for biliary form analysis in whole slide histopathological images. This platform provides clinical and basic science researchers with a novel tool for the improved quantification and characterization of biliary tract disorders.
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Affiliation(s)
- Dominick J Hellen
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Meredith E Fay
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, Aflac Cancer Center and Blood Disorders Service of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia, United States
| | - David H Lee
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Caroline Klindt-Morgan
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Ashley Bennett
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Kimberly J Pachura
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Arash Grakoui
- Emory National Primate Research Center, Division of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Stacey S Huppert
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
| | - Paul A Dawson
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
| | - Wilbur A Lam
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, Aflac Cancer Center and Blood Disorders Service of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Saul J Karpen
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Children's Healthcare of Atlanta and Emory University School of Medicine, Atlanta, Georgia, United States
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2
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Okumura A, Aoshima K, Tanimizu N. Generation of in vivo-like multicellular liver organoids by mimicking developmental processes: A review. Regen Ther 2024; 26:219-234. [PMID: 38903867 PMCID: PMC11186971 DOI: 10.1016/j.reth.2024.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/24/2024] [Accepted: 05/30/2024] [Indexed: 06/22/2024] Open
Abstract
Liver is involved in metabolic reactions, ammonia detoxification, and immunity. Multicellular liver tissue cultures are more desirable for drug screening, disease modeling, and researching transplantation therapy, than hepatocytes monocultures. Hepatocytes monocultures are not stable for long. Further, hepatocyte-like cells induced from pluripotent stem cells and in vivo hepatocytes are functionally dissimilar. Organoid technology circumvents these issues by generating functional ex vivo liver tissue from intrinsic liver progenitor cells and extrinsic stem cells, including pluripotent stem cells. To function as in vivo liver tissue, the liver organoid cells must be arranged precisely in the 3-dimensional space, closely mimicking in vivo liver tissue. Moreover, for long term functioning, liver organoids must be appropriately vascularized and in contact with neighboring epithelial tissues (e.g., bile canaliculi and intrahepatic bile duct, or intrahepatic and extrahepatic bile ducts). Recent discoveries in liver developmental biology allows one to successfully induce liver component cells and generate organoids. Thus, here, in this review, we summarize the current state of knowledge on liver development with a focus on its application in generating different liver organoids. We also cover the future prospects in creating (functionally and structurally) in vivo-like liver organoids using the current knowledge on liver development.
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Affiliation(s)
- Ayumu Okumura
- Division of Regenerative Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-0071, Japan
| | - Kenji Aoshima
- Division of Regenerative Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-0071, Japan
| | - Naoki Tanimizu
- Division of Regenerative Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-0071, Japan
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3
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Wakabayashi N, Yagishita Y, Joshi T, Kensler TW. Dual Deletion of Keap1 and Rbpjκ Genes in Liver Leads to Hepatomegaly and Hypercholesterolemia. Int J Mol Sci 2024; 25:4712. [PMID: 38731931 PMCID: PMC11083431 DOI: 10.3390/ijms25094712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/21/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
The hepatic deletion of Rbpjκ (RbpjF/F::AlbCre) in the mouse leads to exhibition of the Alagille syndrome phenotype during early postnatal liver development with hyperlipidemia and cholestasis due to attenuated disruption of NOTCH signaling. Given the roles of NRF2 signaling in the regulation of lipid metabolism and bile ductal formation, it was anticipated that these symptoms could be alleviated by enhancing NRF2 signaling in the RbpjF/F::AlbCre mouse by hepatic deletion of Keap1 in compound Keap1F/F::RbpjF/F::AlbCre mice. Unexpectedly, these mice developed higher hepatic and plasma cholesterol levels with more severe cholestatic liver damage during the pre-weaning period than in the RbpjF/F::AlbCre mice. In addition, hypercholesterolemia and hepatic damage were sustained throughout the growth period unlike in the RbpjF/F::AlbCre mouse. These enhanced abnormalities in lipid metabolism appear to be due to NRF2-dependent changes in gene expression related to cholesterol synthetic and subsequent bile acid production pathways. Notably, the hepatic expression of Cyp1A7 and Abcb11 genes involved in bile acid homeostasis was significantly reduced in Keap1F/F::RbpjF/F::AlbCre compared to RbpjF/F::AlbCre mice. The accumulation of liver cholesterol and the weakened capacity for bile excretion during the 3 pre-weaning weeks in the Keap1F/F::RbpjF/F::AlbCre mice may aggravate hepatocellular damage level caused by both excessive cholesterol and residual bile acid toxicity in hepatocytes. These results indicate that a tuned balance of NOTCH and NRF2 signaling is of biological importance for early liver development after birth.
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Affiliation(s)
- Nobunao Wakabayashi
- Translational Research Program, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA; (N.W.); (T.J.)
| | - Yoko Yagishita
- Translational Research Program, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA; (N.W.); (T.J.)
- Division of Endocrinology, Columbia University, New York, NY 10032, USA
| | - Tanvi Joshi
- Translational Research Program, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA; (N.W.); (T.J.)
| | - Thomas W. Kensler
- Translational Research Program, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA; (N.W.); (T.J.)
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Mašek J, Andersson ER. Jagged-mediated development and disease: Mechanistic insights and therapeutic implications for Alagille syndrome. Curr Opin Cell Biol 2024; 86:102302. [PMID: 38194749 DOI: 10.1016/j.ceb.2023.102302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 01/11/2024]
Abstract
Notch signaling controls multiple aspects of embryonic development and adult homeostasis. Alagille syndrome is usually caused by a single mutation in the jagged canonical Notch ligand 1 (JAG1), and manifests with liver disease and cardiovascular symptoms that are a direct consequence of JAG1 haploinsufficiency. Recent insights into Jag1/Notch-controlled developmental and homeostatic processes explain how pathology develops in the hepatic and cardiovascular systems and, together with recent elucidation of mechanisms modulating liver regeneration, provide a basis for therapeutic efforts. Importantly, disease presentation can be regulated by genetic modifiers, that may also be therapeutically leverageable. Here, we summarize recent insights into how Jag1 controls processes of relevance to Alagille syndrome, focused on Jag1/Notch functions in hepatic and cardiovascular development and homeostasis.
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Affiliation(s)
- Jan Mašek
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic. https://twitter.com/JanMasekLab
| | - Emma R Andersson
- Dept of Cell and Molecular Biology, Karolinska Institutet, Sweden.
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Iqbal A, Van Hul N, Belicova L, Corbat AA, Hankeova S, Andersson ER. Spatially segregated defects and IGF1-responsiveness of hilar and peripheral biliary organoids from a model of Alagille syndrome. Liver Int 2024; 44:541-558. [PMID: 38014627 DOI: 10.1111/liv.15789] [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: 04/07/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND & AIMS Alagille syndrome (ALGS) manifests with peripheral intrahepatic bile duct (IHBD) paucity, which can spontaneously resolve. In a model for ALGS, Jag1Ndr/Ndr mice, this occurs with distinct architectural mechanisms in hilar and peripheral IHBDs. Here, we investigated region-specific IHBD characteristics and addressed whether IGF1, a cholangiocyte mitogen that is downregulated in ALGS and in Jag1Ndr/Ndr mice, can improve biliary outcomes. METHODS Intrahepatic cholangiocyte organoids (ICOs) were derived from hilar and peripheral adult Jag1+/+ and Jag1Ndr/Ndr livers (hICOs and pICOs, respectively). ICOs were grown in Matrigel or microwell arrays, and characterized using bulk RNA sequencing, immunofluorescence, and high throughput analyses of nuclear sizes. ICOs were treated with IGF1, followed by analyses of growth, proliferation, and death. CellProfiler and Python scripts were custom written for image analyses. Key results were validated in vivo by immunostaining. RESULTS Cell growth assays and transcriptomics demonstrated that Jag1Ndr/Ndr ICOs were less proliferative than Jag1+/+ ICOs. IGF1 specifically rescued survival and growth of Jag1Ndr/Ndr pICOs. Jag1Ndr/Ndr hICOs were the least proliferative, with lower Notch signalling and an enrichment of hepatocyte signatures and IGF uptake/transport pathways. In vitro (Jag1Ndr/Ndr hICOs) and in vivo (Jag1Ndr/Ndr hilar portal tracts) analyses revealed ectopic HNF4a+ hepatocytes. CONCLUSIONS Hilar and peripheral Jag1Ndr/Ndr ICOs exhibit differences in Notch signalling status, proliferation, and cholangiocyte commitment which may result in cholangiocyte-to-hepatocyte transdifferentiation. While Jag1Ndr/Ndr pICOs can be rescued by IGF1, hICOs are unresponsive, perhaps due to their hepatocyte-like state and/or expression of IGF transport components. IGF1 represents a potential therapeutic for peripheral bile ducts.
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Affiliation(s)
- Afshan Iqbal
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Noemi Van Hul
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Lenka Belicova
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Agustin A Corbat
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Simona Hankeova
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Emma R Andersson
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
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Sutton H, Karpen SJ, Kamath BM. Pediatric Cholestatic Diseases: Common and Unique Pathogenic Mechanisms. ANNUAL REVIEW OF PATHOLOGY 2024; 19:319-344. [PMID: 38265882 DOI: 10.1146/annurev-pathmechdis-031521-025623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Cholestasis is the predominate feature of many pediatric hepatobiliary diseases. The physiologic flow of bile requires multiple complex processes working in concert. Bile acid (BA) synthesis and excretion, the formation and flow of bile, and the enterohepatic reuptake of BAs all function to maintain the circulation of BAs, a key molecule in lipid digestion, metabolic and cellular signaling, and, as discussed in the review, a crucial mediator in the pathogenesis of cholestasis. Disruption of one or several of these steps can result in the accumulation of toxic BAs in bile ducts and hepatocytes leading to inflammation, fibrosis, and, over time, biliary and hepatic cirrhosis. Biliary atresia, progressive familial intrahepatic cholestasis, primary sclerosing cholangitis, and Alagille syndrome are four of the most common pediatric cholestatic conditions. Through understanding the commonalities and differences in these diseases, the important cellular mechanistic underpinnings of cholestasis can be greater appreciated.
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Affiliation(s)
- Harry Sutton
- The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada;
| | - Saul J Karpen
- Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| | - Binita M Kamath
- The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada;
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Yoshihara M, Nakayama T, Takahashi S. Chromatin accessibility analysis suggested vascular induction of the biliary epithelium via the Notch signaling pathway in the human liver. BMC Res Notes 2023; 16:379. [PMID: 38129911 PMCID: PMC10734141 DOI: 10.1186/s13104-023-06674-8] [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: 07/30/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023] Open
Abstract
The biliary epithelial cells (cholangiocytes) in the liver originate from undifferentiated liver parenchymal cells (hepatoblasts) that are located adjacent to the portal vein. This differentiation process is driven by Notch signaling, which is recognized for generating salt-and-pepper (fine-grained) patterns, in contrast to one- or two-cell layer (spatially confined) patterning in cholangiocyte differentiation. It is unclear how Notch signaling acts and localizes only in cholangiocytes. A computer simulation study suggested that low production rates of the ligands or receptors of Notch signaling are crucial for the spatially confined patterning, although biochemical examination is lacking. Here, we analyzed a publicly available single-cell ATAC-sequencing dataset from human fetal liver samples. We showed high chromatin accessibility for the ligands only in vascular cells, while that for the receptor is limited to a small population of hepatoblasts. This finding strengthens the previously proposed idea that low production rates of the ligands or receptors of Notch signaling enable vascular induction of cholangiocytes.
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Affiliation(s)
- Masaharu Yoshihara
- Department of Primary Care and Medical Education, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.
- Laboratory Animal Resource Center, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Takahiro Nakayama
- College of Medicine, School of Medicine and Health Sciences, University of Tsukuba, Tsukuba, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
- Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
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Feng D, Xiang X, Guan Y, Guillot A, Lu H, Chang C, He Y, Wang H, Pan H, Ju C, Colgan SP, Tacke F, Wang XW, Kunos G, Gao B. Monocyte-derived macrophages orchestrate multiple cell-type interactions to repair necrotic liver lesions in disease models. J Clin Invest 2023; 133:e166954. [PMID: 37338984 PMCID: PMC10378165 DOI: 10.1172/jci166954] [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: 11/28/2022] [Accepted: 06/15/2023] [Indexed: 06/22/2023] Open
Abstract
The liver can fully regenerate after partial resection, and its underlying mechanisms have been extensively studied. The liver can also rapidly regenerate after injury, with most studies focusing on hepatocyte proliferation; however, how hepatic necrotic lesions during acute or chronic liver diseases are eliminated and repaired remains obscure. Here, we demonstrate that monocyte-derived macrophages (MoMFs) were rapidly recruited to and encapsulated necrotic areas during immune-mediated liver injury and that this feature was essential in repairing necrotic lesions. At the early stage of injury, infiltrating MoMFs activated the Jagged1/notch homolog protein 2 (JAG1/NOTCH2) axis to induce cell death-resistant SRY-box transcription factor 9+ (SOX9+) hepatocytes near the necrotic lesions, which acted as a barrier from further injury. Subsequently, necrotic environment (hypoxia and dead cells) induced a cluster of complement 1q-positive (C1q+) MoMFs that promoted necrotic removal and liver repair, while Pdgfb+ MoMFs activated hepatic stellate cells (HSCs) to express α-smooth muscle actin and induce a strong contraction signal (YAP, pMLC) to squeeze and finally eliminate the necrotic lesions. In conclusion, MoMFs play a key role in repairing the necrotic lesions, not only by removing necrotic tissues, but also by inducing cell death-resistant hepatocytes to form a perinecrotic capsule and by activating α-smooth muscle actin-expressing HSCs to facilitate necrotic lesion resolution.
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Affiliation(s)
- Dechun Feng
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Xiaogang Xiang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Yukun Guan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Adrien Guillot
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Hongkun Lu
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Chingwen Chang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Yong He
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hua Wang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hongna Pan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Cynthia Ju
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Sean P. Colgan
- Department of Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - George Kunos
- Laboratory of Physiologic Studies, NIAAA, NIH, Bethesda, Maryland, USA
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
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Yoshihara M, Takahashi S. Recent advances in in situ Notch signaling measurement. Front Cell Dev Biol 2023; 11:1244105. [PMID: 37576594 PMCID: PMC10416437 DOI: 10.3389/fcell.2023.1244105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 07/21/2023] [Indexed: 08/15/2023] Open
Abstract
Notch signaling is necessary for the development of many organ systems, including the nervous system, biliary system, and visual and auditory sensory systems. This signaling pathway is composed of DSL ligands and Notch receptors. Upon the interaction of those components between neighboring cells, the intracellular domain of the Notch receptor is cleaved from the cell membrane to act as a transcription factor. To date, many mechanistic insights, including lateral inhibition and lateral induction, have been proposed from observation of patterning morphogenesis and expression profiles of Notch signaling-associated molecules. The lack of a direct measurement method for Notch signaling, however, has impeded the examination of those mechanistic insights. In this mini-review, recent advances in the direct measurement of Notch signaling are introduced with a focus on the application of genetic modification of Notch receptors with the components of the Cre/loxP system and Gal4/UAS system. The combination of such conventional genetic techniques is opening a new era in Notch signaling biology by direct visualization of Notch "signaling" in addition to Notch signaling-associated molecules.
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Affiliation(s)
- Masaharu Yoshihara
- Department of Primary Care and Medical Education, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
- Transborder Medical Research Center, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
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Bai MR, Pei HY, Zhou Y, Song HL, Pan WH, Gong YM, Wu WJ, Yu WW, Cui MM, Gu BL, Chu X, Cai W. Association analysis and functional follow-up identified common variants of JAG1 accounting for risk to biliary atresia. Front Genet 2023; 14:1186882. [PMID: 37255715 PMCID: PMC10225652 DOI: 10.3389/fgene.2023.1186882] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/05/2023] [Indexed: 06/01/2023] Open
Abstract
Background: Biliary atresia (BA) is a destructive, obliterative cholangiopathy characterized by progressive fibro-inflammatory disorder and obliteration of intra- and extrahepatic bile ducts. The Jagged1 (JAG1) gene mutations have been found in some isolated BA cases. We aim to explore the association of common variants in JAG1 with isolated BA risk in the Chinese Han population. Methods: We genotyped 31 tag single nucleotide polymorphisms covering the JAG1 gene region in 333 BA patients and 1,665 healthy controls from the Chinese population, and performed case-control association analysis. The expression patterns of JAG1 homologs were investigated in zebrafish embryos, and the roles of jag1a and jag1b in biliary development were examined by morpholino knockdown in zebrafish. Results: Single nucleotide polymorphisms rs6077861 [P Allelic = 1.74 × 10-4, odds ratio = 1.78, 95% confidence interval: 1.31-2.40] and rs3748478 (P Allelic = 5.77 × 10-4, odds ratio = 1.39, 95% confidence interval: 1.15-1.67) located in the intron region of JAG1 showed significant associations with BA susceptibility. The JAG1 homologs, jag1a and jag1b genes were expressed in the developing hepatobiliary duct of zebrafish, especially at 72 and 96 h postfertilization. Knockdown of both jag1a and jag1b led to poor biliary secretion, sparse intrahepatic bile duct network and smaller or no gallbladders compared with control embryos in the zebrafish model. Conclusion: Common genetic variants of JAG1 were associated with BA susceptibility. Knockdown of JAG1 homologs led to defective intrahepatic and extrahepatic bile ducts in zebrafish. These results suggest that JAG1 might be implicated in the etiology of BA.
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Affiliation(s)
- Mei-Rong Bai
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Hao-Yue Pei
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Ying Zhou
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Huan-Lei Song
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Wei-Hua Pan
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yi-Ming Gong
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wen-Jie Wu
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wen-Wen Yu
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Meng-Meng Cui
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Bei-Lin Gu
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Xun Chu
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Wei Cai
- Department of Pediatric Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Institute of Pediatric Research, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
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Xu YN, Xu W, Zhang X, Wang DY, Zheng XR, Liu W, Chen JM, Chen GF, Liu CH, Liu P, Mu YP. BM-MSCs overexpressing the Numb enhance the therapeutic effect on cholestatic liver fibrosis by inhibiting the ductular reaction. Stem Cell Res Ther 2023; 14:45. [PMID: 36941658 PMCID: PMC10029310 DOI: 10.1186/s13287-023-03276-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 03/09/2023] [Indexed: 03/23/2023] Open
Abstract
BACKGROUND Cholestatic liver fibrosis (CLF) is caused by inflammatory destruction of the intrahepatic bile duct and abnormal proliferation of the small bile duct after cholestasis. Activation of the Notch signaling pathway is required for hepatic stem cells to differentiate into cholangiocytes during the pathogenesis of CLF. Our previous research found that the expression of the Numb protein, a negative regulator of Notch signaling, was significantly reduced in the livers of patients with primary biliary cholangitis and CLF rats. However, the relationship between the Numb gene and CLF is largely unclear. In this study, we investigated the role of the Numb gene in the treatment of bile duct ligation (BDL)-induced CLF. METHODS In vivo, bone marrow-derived mesenchymal stem cells (BM-MSCs) with Numb gene overexpression or knockdown obtained using lentivirus transfection were transplanted into the livers of rats with BDL-induced CLF. The effects of the Numb gene on stem cell differentiation and CLF were evaluated by performing histology, tests of liver function, and measurements of liver hydroxyproline, cytokine gene and protein levels. In vitro, the Numb gene was overexpressed or knocked down in the WB-F344 cell line by lentivirus transfection, Then, cells were subjected immunofluorescence staining and the detection of mRNA levels of related factors, which provided further evidence supporting the results from in vivo experiments. RESULTS BM-MSCs overexpressing the Numb gene differentiated into hepatocytes, thereby inhibiting CLF progression. Conversely, BM-MSCs with Numb knockdown differentiated into biliary epithelial cells (BECs), thereby promoting the ductular reaction (DR) and the progression of CLF. In addition, we confirmed that knockdown of Numb in sodium butyrate-treated WB-F344 cells aggravated WB-F344 cell differentiation into BECs, while overexpression of Numb inhibited this process. CONCLUSIONS The transplantation of BM-MSCs overexpressing Numb may be a useful new treatment strategy for CLF.
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Affiliation(s)
- Yan-Nan Xu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Wen Xu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Xu Zhang
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Dan-Yang Wang
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Xin-Rui Zheng
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Wei Liu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Jia-Mei Chen
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Gao-Feng Chen
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Cheng-Hai Liu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China
| | - Ping Liu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China.
| | - Yong-Ping Mu
- Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Liver Diseases, Shanghai University of TCM, Key Laboratory of Liver and Kidney Disease of the Ministry of Education, Clinical Key Laboratory of TCM of Shanghai, 528, Zhangheng Road, Pudong District, Shanghai, 201203, China.
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12
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Zhou Q, Li B, Li J. DLL4-Notch signalling in acute-on-chronic liver failure: State of the art and perspectives. Life Sci 2023; 317:121438. [PMID: 36709913 DOI: 10.1016/j.lfs.2023.121438] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/20/2023] [Accepted: 01/21/2023] [Indexed: 01/28/2023]
Abstract
Acute-on-chronic liver failure (ACLF) is a syndrome characterized by acute decompensation of chronic liver disease associated with multiple-organ failures and high short-term mortality. Acute insults to patients with chronic liver disease can lead to ACLF, among which, hepatitis B virus-related ACLF is the most common type of liver failure in the Asia-Pacific region. Currently, immune-metabolism disorders and systemic inflammation are proposed to be the main mechanisms of ACLF. The resulting cholestasis and intrahepatic microcirculatory dysfunction accelerate the development of ACLF. Treatments targeting immune regulation, metabolic balance, microcirculation maintenance and bile duct repair can alleviate inflammation and restore the tissue structure. An increasing number of studies have demonstrated that delta-like ligand 4 (DLL4), one of the Notch signalling ligands, plays a vital role in immune regulation, metabolism, angiogenesis, and biliary regeneration, which participate in liver pathological and physiological processes. The detailed mechanism of the DLL4-Notch signalling pathway in ACLF has rarely been investigated. Here, we review the evidence showing that DLL4-Notch signalling is involved in ACLF and analyse the potential role of DLL4 in the treatment of ACLF.
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Affiliation(s)
- Qian Zhou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Centre for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou 310003, China
| | - Bingqi Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Centre for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou 310003, China
| | - Jun Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Centre for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Rd., Hangzhou 310003, China; Precision Medicine Center of Taizhou Central Hospital, Taizhou University Medical School, Taizhou, China.
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13
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Pu W, Zhu H, Zhang M, Pikiolek M, Ercan C, Li J, Huang X, Han X, Zhang Z, Lv Z, Li Y, Liu K, He L, Liu X, Heim MH, Terracciano LM, Tchorz JS, Zhou B. Bipotent transitional liver progenitor cells contribute to liver regeneration. Nat Genet 2023; 55:651-664. [PMID: 36914834 PMCID: PMC10101857 DOI: 10.1038/s41588-023-01335-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 02/07/2023] [Indexed: 03/16/2023]
Abstract
Following severe liver injury, when hepatocyte-mediated regeneration is impaired, biliary epithelial cells (BECs) can transdifferentiate into functional hepatocytes. However, the subset of BECs with such facultative tissue stem cell potential, as well as the mechanisms enabling transdifferentiation, remains elusive. Here we identify a transitional liver progenitor cell (TLPC), which originates from BECs and differentiates into hepatocytes during regeneration from severe liver injury. By applying a dual genetic lineage tracing approach, we specifically labeled TLPCs and found that they are bipotent, as they either differentiate into hepatocytes or re-adopt BEC fate. Mechanistically, Notch and Wnt/β-catenin signaling orchestrate BEC-to-TLPC and TLPC-to-hepatocyte conversions, respectively. Together, our study provides functional and mechanistic insights into transdifferentiation-assisted liver regeneration.
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Affiliation(s)
- Wenjuan Pu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Huan Zhu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Mingjun Zhang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Monika Pikiolek
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Caner Ercan
- Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland
| | - Jie Li
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Xiuzhen Huang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Ximeng Han
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Zhenqian Zhang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Zan Lv
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yan Li
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Kuo Liu
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China
| | - Lingjuan He
- School of Life Sciences, Westlake University, Hangzhou, China
| | - Xiuxiu Liu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Markus H Heim
- Department of Biomedicine, University Hospital and University of Basel, Basel, Switzerland.,Clarunis University Center for Gastrointestinal and Liver Diseases, Basel, Switzerland
| | - Luigi M Terracciano
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,IRCCS Humanitas Research Hospital, Milan, Italy
| | - Jan S Tchorz
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland.
| | - Bin Zhou
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China. .,Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China. .,School of Life Science and Technology, ShanghaiTech University, Shanghai, China. .,New Cornerstone Science Laboratory, Shenzhen, China.
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14
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Comerford SA, Hinnant EA, Chen Y, Hammer RE. Hepatic ribosomal protein S6 (Rps6) insufficiency results in failed bile duct development and loss of hepatocyte viability; a ribosomopathy-like phenotype that is partially p53-dependent. PLoS Genet 2023; 19:e1010595. [PMID: 36656901 PMCID: PMC9888725 DOI: 10.1371/journal.pgen.1010595] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/31/2023] [Accepted: 12/26/2022] [Indexed: 01/20/2023] Open
Abstract
Defective ribosome biogenesis (RiBi) underlies a group of clinically diverse human diseases collectively known as the ribosomopathies, core manifestations of which include cytopenias and developmental abnormalities that are believed to stem primarily from an inability to synthesize adequate numbers of ribosomes and concomitant activation of p53. The importance of a correctly functioning RiBi machinery for maintaining tissue homeostasis is illustrated by the observation that, despite having a paucity of certain cell types in early life, ribosomopathy patients have an increased risk for developing cancer later in life. This suggests that hypoproliferative states trigger adaptive responses that can, over time, become maladaptive and inadvertently drive unchecked hyperproliferation and predispose to cancer. Here we describe an experimentally induced ribosomopathy in the mouse and show that a normal level of hepatic ribosomal protein S6 (Rps6) is required for proper bile duct development and preservation of hepatocyte viability and that its insufficiency later promotes overgrowth and predisposes to liver cancer which is accelerated in the absence of the tumor-suppressor PTEN. We also show that the overexpression of c-Myc in the liver ameliorates, while expression of a mutant hyperstable form of p53 partially recapitulates specific aspects of the hepatopathies induced by Rps6 deletion. Surprisingly, co-deletion of p53 in the Rps6-deficient background fails to restore biliary development or significantly improve hepatic function. This study not only reveals a previously unappreciated dependence of the developing liver on adequate levels of Rps6 and exquisitely controlled p53 signaling, but suggests that the increased cancer risk in ribosomopathy patients may, in part, stem from an inability to preserve normal tissue homeostasis in the face of chronic injury and regeneration.
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Affiliation(s)
- Sarah A. Comerford
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Elizabeth A. Hinnant
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Yidong Chen
- Department of Population Health Sciences, University of Texas Health San Antonio, San Antonio, Texas, United States of America
- Greehey Children’s Cancer Research Institute, University of Texas Health San Antonio, San Antonio, Texas. United States of America
| | - Robert E. Hammer
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- * E-mail:
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15
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Wang Y, Yuan H, Zhao M, Fang L. Identification of signature of gene expression in biliary atresia using weighted gene co-expression network analysis. Medicine (Baltimore) 2022; 101:e30232. [PMID: 36123893 PMCID: PMC9478247 DOI: 10.1097/md.0000000000030232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Biliary atresia (BA) is the most common cause of obstructive jaundice during the neonatal period. This study aimed to identify gene expression signature in BA. The datasets were obtained from the Gene Expression Omnibus database. Weighted gene co-expression network analysis identified a critical module associated with BA, whereas Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis revealed the functions of the essential modules. The high-connectivity genes in the most relevant module constructed protein-protein interaction networks via the string website and Cytoscape software. Hub genes screened by lasso regression consisted of a disease classification model using the randomforest method. Receiver operating characteristic curves were used to assess models' sensitivity and specificity and the model was verified using the internal and external validation sets. Ten gene modules were constructed by WGCNA, of which the brown module had a strong positive correlation with BA, comprising 443 genes. Functional enrichment analysis revealed that module genes were mainly involved in biological processes, such as extracellular matrix organization, cell adhesion, inflammatory response, and the Notch pathway (P < .001), whereas these genes were involved in the metabolic pathways and cell adhesion molecules (P < .001). Thirty-nine high-connectivity genes in the brown module constructed protein-protein interaction networks. keratin 7 (KRT7) and C-X-C motif chemokine ligand 8 (CXCL8) were used to construct a diagnostic model that had an accuracy of 93.6% and the area under the receiver operating curves for the model was 0.93. The study provided insight into the signature of gene expression and possible pathogenesis of BA; furthermore, it identified that the combination of KRT7 and CXCL8 could be a potential diagnostic model for BA.
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Affiliation(s)
- Yongliang Wang
- Hepatological Surgery Department, The First People’s Hospital of Guiyang City, Guizhou Province, China
| | - Hongtao Yuan
- Hepatological Surgery Department, The First People’s Hospital of Guiyang City, Guizhou Province, China
- *Correspondence: Hongtao Yuan, Hepatological Surgery Department, The NO.1 People’s Hospital of Guiyang City, Guizhou Province, China (e-mail:
| | - Maojun Zhao
- Emergency Department, The First People’s Hospital of Guiyang City, Guizhou Province, China
| | - Li Fang
- Department of Critical Care Medicine, The First People’s Hospital of Guiyang City, Guizhou Province, China
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16
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Wang W, Chen D, Wang J, Wen L. Cellular Homeostasis and Repair in the Biliary Tree. Semin Liver Dis 2022; 42:271-282. [PMID: 35672015 DOI: 10.1055/a-1869-7714] [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] [Indexed: 02/01/2023]
Abstract
During biliary tree homeostasis, BECs are largely in a quiescent state and their turnover is slow for maintaining normal tissue homeostasis. BTSCs continually replenish new BECs in the luminal surface of EHBDs. In response to various types of biliary injuries, distinct cellular sources, including HPCs, BTSCs, hepatocytes, and BECs, repair or regenerate the injured bile duct. BEC, biliary epithelial cell; BTSC, biliary tree stem/progenitor cell; EHBD, extrahepatic bile ducts; HPC, hepatic progenitor cell.The biliary tree comprises intrahepatic bile ducts and extrahepatic bile ducts lined with epithelial cells known as biliary epithelial cells (BECs). BECs are a common target of various cholangiopathies for which there is an unmet therapeutic need in clinical hepatology. The repair and regeneration of biliary tissue may potentially restore the normal architecture and function of the biliary tree. Hence, the repair and regeneration process in detail, including the replication of existing BECs, expansion and differentiation of the hepatic progenitor cells and biliary tree stem/progenitor cells, and transdifferentiation of the hepatocytes, should be understood. In this paper, we review biliary tree homeostasis, repair, and regeneration and discuss the feasibility of regenerative therapy strategies for cholangiopathy treatment.
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Affiliation(s)
- Wei Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Dongfeng Chen
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Jun Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
| | - Liangzhi Wen
- Department of Gastroenterology, Daping Hospital, Army Medical University, Chongqing, China
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17
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Notch signaling pathway: architecture, disease, and therapeutics. Signal Transduct Target Ther 2022; 7:95. [PMID: 35332121 PMCID: PMC8948217 DOI: 10.1038/s41392-022-00934-y] [Citation(s) in RCA: 316] [Impact Index Per Article: 158.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/16/2022] [Accepted: 02/16/2022] [Indexed: 02/07/2023] Open
Abstract
The NOTCH gene was identified approximately 110 years ago. Classical studies have revealed that NOTCH signaling is an evolutionarily conserved pathway. NOTCH receptors undergo three cleavages and translocate into the nucleus to regulate the transcription of target genes. NOTCH signaling deeply participates in the development and homeostasis of multiple tissues and organs, the aberration of which results in cancerous and noncancerous diseases. However, recent studies indicate that the outcomes of NOTCH signaling are changeable and highly dependent on context. In terms of cancers, NOTCH signaling can both promote and inhibit tumor development in various types of cancer. The overall performance of NOTCH-targeted therapies in clinical trials has failed to meet expectations. Additionally, NOTCH mutation has been proposed as a predictive biomarker for immune checkpoint blockade therapy in many cancers. Collectively, the NOTCH pathway needs to be integrally assessed with new perspectives to inspire discoveries and applications. In this review, we focus on both classical and the latest findings related to NOTCH signaling to illustrate the history, architecture, regulatory mechanisms, contributions to physiological development, related diseases, and therapeutic applications of the NOTCH pathway. The contributions of NOTCH signaling to the tumor immune microenvironment and cancer immunotherapy are also highlighted. We hope this review will help not only beginners but also experts to systematically and thoroughly understand the NOTCH signaling pathway.
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Zhu S, Rao X, Qian Y, Chen J, Song R, Yan H, Yang X, Hu J, Wang X, Han Z, Zhu Y, Liu R, Jong-Leong Wong J, McCaughan GW, Zheng X. Liver Endothelial Heg Regulates Vascular/Biliary Network Patterning and Metabolic Zonation Via Wnt Signaling. Cell Mol Gastroenterol Hepatol 2022; 13:1757-1783. [PMID: 35202885 PMCID: PMC9059100 DOI: 10.1016/j.jcmgh.2022.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS The liver has complex interconnecting blood vessel and biliary networks; however, how the vascular and biliary network form and regulate each other and liver function are not well-understood. We aimed to examine the role of Heg in mammalian liver development and functional maintenance. METHODS Global (Heg-/-) or liver endothelial cell (EC)-specific deletion of Heg (Lyve1-Cre;Hegfl/fl ) mice were used to study the in vivo function of Heg in the liver. Carbon-ink anterograde and retrograde injection were used to visualize the 3-dimensional patterning of liver portal and biliary networks, respectively. RNA sequencing, histology, and molecular and biochemical assays were used to assess liver gene expression, protein distribution, liver injury response, and function. RESULTS Heg deficiency in liver ECs led to a sparse liver vascular and biliary network. This network paucity does not compromise liver function under baseline conditions but did alter liver zonation. Molecular analysis revealed that endothelial Heg deficiency decreased expression of Wnt ligands/agonists including Wnt2, Wnt9b, and Rspo3 in ECs, which limits Axin2 mediated canonical Wnt signaling and the expression of cytochrome P450 enzymes in hepatocytes. Under chemical-induced stressed conditions, Heg-deficiency in liver ECs protected mice from drug-induced liver injuries. CONCLUSION Our study found that endothelial Heg is essential for the 3-D patterning of the liver vascular and indirectly regulates biliary networks and proper liver zonation via its regulation of Wnt ligand production in liver endothelial cells. The endothelial Heg-initiated changes of the liver metabolic zonation and metabolic enzyme expression in hepatocytes was functionally relevant to xenobiotic metabolism and drug induced liver toxicity.
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Affiliation(s)
- Shichao Zhu
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xiyun Rao
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Yude Qian
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Jinbiao Chen
- Liver Injury and Cancer Program Centenary Institute and Sydney Medical School, The University of Sydney, A.W Morrow Gastroenterology and Liver Center, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Renhua Song
- Epigenetics and RNA Biology Program Centenary Institute and Sydney Medical School, The University of Sydney, Sydney, NSW, Australia
| | - Huili Yan
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xi Yang
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Junhao Hu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Xiaohong Wang
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zhiming Han
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Yi Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Renjing Liu
- Vascular Epigenetics Laboratory, Victor Chang Cardiac Research Institute, Sydney, NSW, Australia
| | - Justin Jong-Leong Wong
- Epigenetics and RNA Biology Program Centenary Institute and Sydney Medical School, The University of Sydney, Sydney, NSW, Australia
| | - Geoffrey W. McCaughan
- Liver Injury and Cancer Program Centenary Institute and Sydney Medical School, The University of Sydney, A.W Morrow Gastroenterology and Liver Center, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Xiangjian Zheng
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China,Correspondence Address correspondence to: Dr Xiangjian Zheng, Pharmacology, Tianjin Medical University, No 22 Qi Xiang Tai Rd, Tianjin 300070, China. tel: 86-22-8333-6835.
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Dong C, Zhang BP, Ying YQ, Hou L, Wu W, Wei H, Luo XP. Oestradiol promotes the intrahepatic bile duct development of C57BL/6CrSlc mice during embryonic period via Notch signalling pathway. J Cell Mol Med 2021; 25:9447-9459. [PMID: 34498380 PMCID: PMC8500961 DOI: 10.1111/jcmm.16888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/28/2021] [Accepted: 08/12/2021] [Indexed: 01/23/2023] Open
Abstract
Oestradiol (E2) is a critical factor for multiple systems' development during the embryonic period. Here, we aimed to investigate the effects of oestradiol on intrahepatic bile duct development, which may allow a better understanding of congenital bile duct dysplasia. DLK+ hepatoblasts were extracted from the C57BL/6CrSlc foetal mice and randomly divided into control group, oestradiol groups (1, 10, 100 nM) and oestradiol (10 nM) + DAPT (inhibitor of Notch signalling; 40 µM) group for in vitro experiments. For in vivo analysis, pregnant mice were divided into control group, oestradiol (intraperitoneal injection of 0.6 mg/kg/day) ± DAPT (subcutaneous injection of 10 mg/kg/day) groups and tamoxifen (gavage administration of 0.4 mg/kg/day) group. The results showed that oestradiol promoted hepatoblast differentiation into cholangiocytes and intrahepatic bile duct development during the embryonic period. Tamoxifen, an antioestrogenic drug, inhibited the above processes. Moreover, oestradiol promoted the expression of Notch signalling pathway‐associated proteins and genes both in vitro and in vivo. Notably, DAPT addition inhibited the oestradiol‐mediated effects. In conclusion, oestradiol can promote hepatoblast differentiation into cholangiocytes and intrahepatic bile duct development of C57BL/6CrSlc mice during embryonic period via the Notch signalling pathway.
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Affiliation(s)
- Chen Dong
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ben-Ping Zhang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan-Qin Ying
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ling Hou
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Wu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Wei
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Ping Luo
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Cordero-Espinoza L, Dowbaj AM, Kohler TN, Strauss B, Sarlidou O, Belenguer G, Pacini C, Martins NP, Dobie R, Wilson-Kanamori JR, Butler R, Prior N, Serup P, Jug F, Henderson NC, Hollfelder F, Huch M. Dynamic cell contacts between periportal mesenchyme and ductal epithelium act as a rheostat for liver cell proliferation. Cell Stem Cell 2021; 28:1907-1921.e8. [PMID: 34343491 PMCID: PMC8577825 DOI: 10.1016/j.stem.2021.07.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 05/19/2021] [Accepted: 07/09/2021] [Indexed: 02/06/2023]
Abstract
In the liver, ductal cells rarely proliferate during homeostasis but do so transiently after tissue injury. These cells can be expanded as organoids that recapitulate several of the cell-autonomous mechanisms of regeneration but lack the stromal interactions of the native tissue. Here, using organoid co-cultures that recapitulate the ductal-to-mesenchymal cell architecture of the portal tract, we demonstrate that a subpopulation of mouse periportal mesenchymal cells exerts dual control on proliferation of the epithelium. Ductal cell proliferation is either induced and sustained or, conversely, completely abolished, depending on the number of direct mesenchymal cell contacts, through a mechanism mediated, at least in part, by Notch signaling. Our findings expand the concept of the cellular niche in epithelial tissues, whereby not only soluble factors but also cell-cell contacts are the key regulatory cues involved in the control of cellular behaviors, suggesting a critical role for cell-cell contacts during regeneration.
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Affiliation(s)
- Lucía Cordero-Espinoza
- Wellcome Trust/Cancer Research UK Gurdon Institute, Cambridge CB2 1QN, UK; Wellcome Trust-Medical Research Council Stem Cell Institute, Cambridge CB2 1QR, UK; Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | - Anna M Dowbaj
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Timo N Kohler
- Wellcome Trust-Medical Research Council Stem Cell Institute, Cambridge CB2 1QR, UK; Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
| | - Bernhard Strauss
- Wellcome Trust/Cancer Research UK Gurdon Institute, Cambridge CB2 1QN, UK
| | - Olga Sarlidou
- Wellcome Trust/Cancer Research UK Gurdon Institute, Cambridge CB2 1QN, UK
| | - German Belenguer
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Clare Pacini
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SA, UK
| | - Nuno P Martins
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Ross Dobie
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - John R Wilson-Kanamori
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Richard Butler
- Wellcome Trust/Cancer Research UK Gurdon Institute, Cambridge CB2 1QN, UK
| | - Nicole Prior
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Palle Serup
- Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen 2200, Denmark
| | - Florian Jug
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany
| | - Neil C Henderson
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK; MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Florian Hollfelder
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
| | - Meritxell Huch
- Wellcome Trust/Cancer Research UK Gurdon Institute, Cambridge CB2 1QN, UK; Wellcome Trust-Medical Research Council Stem Cell Institute, Cambridge CB2 1QR, UK; Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK; Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01307, Germany.
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21
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Yoshihara M, Nishino T, Yadav MK, Kuno A, Nagata T, Ando H, Takahashi S. Mathematical analysis of the effect of portal vein cells on biliary epithelial cell differentiation through the Delta-Notch signaling pathway. BMC Res Notes 2021; 14:243. [PMID: 34187572 PMCID: PMC8243745 DOI: 10.1186/s13104-021-05656-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 06/15/2021] [Indexed: 12/01/2022] Open
Abstract
Objective The Delta-Notch signaling pathway induces fine-grained patterns of differentiation from initially homogeneous progenitor cells in many biological contexts, including Drosophila bristle formation, where mathematical modeling reportedly suggests the importance of production rate of the components of this signaling pathway. In contrast, the epithelial differentiation of bile ducts in the developing liver is unique in that it occurs around the portal vein cells, which express extremely high amounts of Delta ligands and act as a disturbance for the amount of Delta ligands in the field by affecting the expression levels of downstream target genes in the cells nearby. In the present study, we mathematically examined the dynamics of the Delta-Notch signaling pathway components in disturbance-driven biliary differentiation, using the model for fine-grained patterns of differentiation. Results A portal vein cell induced a high Notch signal in its neighboring cells, which corresponded to epithelial differentiation, depending on the production rates of Delta ligands and Notch receptors. In addition, this epithelial differentiation tended to occur in conditions where fine-grained patterning was reported to be lacking. These results highlighted the potential importance of the stability towards homogeneity determined by the production rates in Delta ligands and Notch receptors, in a disturbance-dependent epithelial differentiation. Supplementary Information The online version contains supplementary material available at 10.1186/s13104-021-05656-y.
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Affiliation(s)
- Masaharu Yoshihara
- Ph.D. Program in Humanics, School of Integrative and Global Majors, University of Tsukuba, Tsukuba, Japan. .,Laboratory Animal Resource Center, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Teppei Nishino
- College of Medicine, School of Medicine and Health Sciences, University of Tsukuba, Tsukuba, Japan
| | - Manoj Kumar Yadav
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Akihiro Kuno
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Takeshi Nagata
- Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba, Japan
| | - Hiroyasu Ando
- Division of Policy and Planning Science, Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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22
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Wang W, Pottorf TS, Wang HH, Dong R, Kavanaugh MA, Cornelius JT, Dennis KL, Apte U, Pritchard MT, Sharma M, Tran PV. IFT-A deficiency in juvenile mice impairs biliary development and exacerbates ADPKD liver disease. J Pathol 2021; 254:289-302. [PMID: 33900625 DOI: 10.1002/path.5685] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 04/16/2021] [Indexed: 02/06/2023]
Abstract
Polycystic liver disease (PLD) is characterized by the growth of numerous biliary cysts and presents in patients with autosomal dominant polycystic kidney disease (ADPKD), causing significant morbidity. Interestingly, deletion of intraflagellar transport-B (IFT-B) complex genes in adult mouse models of ADPKD attenuates the severity of PKD and PLD. Here we examine the role of deletion of an IFT-A gene, Thm1, in PLD of juvenile and adult Pkd2 conditional knockout mice. Perinatal deletion of Thm1 resulted in disorganized and expanded biliary regions, biliary fibrosis, increased serum bile acids, and a shortened primary cilium on cytokeratin 19+ (CK19+) epithelial cells. In contrast, perinatal deletion of Pkd2 caused PLD, with multiple CK19+ epithelial cell-lined cysts, fibrosis, lengthened primary cilia, and increased Notch and ERK signaling. Perinatal deletion of Thm1 in Pkd2 conditional knockout mice increased hepatomegaly, liver necrosis, as well as serum bilirubin and bile acid levels, indicating enhanced liver disease severity. In contrast to effects in the developing liver, deletion of Thm1 alone in adult mice did not cause a biliary phenotype. Combined deletion of Pkd2 and Thm1 caused variable hepatic cystogenesis at 4 months of age, but differences in hepatic cystogenesis between Pkd2- and Pkd2;Thm1 knockout mice were not observed by 6 months of age. Similar to juvenile PLD, Notch and ERK signaling were increased in adult Pkd2 conditional knockout cyst-lining epithelial cells. Taken together, Thm1 is required for biliary tract development, and proper biliary development restricts PLD severity. Unlike IFT-B genes, Thm1 does not markedly attenuate hepatic cystogenesis, suggesting differences in regulation of signaling and cystogenic processes in the liver by IFT-B and -A. Notably, increased Notch signaling in cyst-lining epithelial cells may indicate that aberrant activation of this pathway promotes hepatic cystogenesis, presenting as a novel potential therapeutic target. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Wei Wang
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Tana S Pottorf
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Henry H Wang
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Ruochen Dong
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Matthew A Kavanaugh
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Joseph T Cornelius
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Katie L Dennis
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, USA
| | - Udayan Apte
- Department of Pharmacology, Toxicology and Therapeutics, The Liver Center, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Michele T Pritchard
- Department of Pharmacology, Toxicology and Therapeutics, The Liver Center, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Madhulika Sharma
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Pamela V Tran
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
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23
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Fine-scale visualizing the hierarchical structure of mouse biliary tree with fluorescence microscopy method. Biosci Rep 2021; 40:223572. [PMID: 32364232 PMCID: PMC7218221 DOI: 10.1042/bsr20193757] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 04/15/2020] [Accepted: 05/01/2020] [Indexed: 02/05/2023] Open
Abstract
The liver is a vital organ and the hepatic lobule serves as the most basic structural and functional unit which is mainly assembled with parenchymal cells including hepatocytes and biliary epithelial cells. The continuous tubular arrangement of biliary cells which constitutes the biliary tracts is critical for liver function, however, the biliary tracts are often disrupted in many liver diseases such as cirrhosis and some congenital disorders. Visualization of the biliary tracts in fine-scale and three-dimension will help to understanding the structure basis of these liver diseases. In the present study, we established several biliary tract injury mouse models by diet feeding, surgery or genetic modification. The cytoplasm and nuclei of the parenchymal cells were marked by active uptake of fluorescent dyes Rhodamine B (red) and Hoechst (blue), respectively. After the removal of liver en bloc, the biliary tracts were retrogradely perfused with green fluorescent dye, fluorescein isothiocyanate (FITC). The liver was then observed under confocal microscopy. The fine-scale and three-dimensional (3D) structure of the whole biliary tree, particularly the network of the end-terminal bile canaliculi and neighboring hepatocytes were clearly visualized. The biliary tracts displayed clear distinct characteristics in normal liver and diseased liver models. Taken together, we have developed a simple and repeatable imaging method to visualize the fine-scale and hierarchical architecture of the biliary tracts spreading in the mouse liver.
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24
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Ghaffari K, Pierce LX, Roufaeil M, Gibson I, Tae K, Sahoo S, Cantrell JR, Andersson O, Lau J, Sakaguchi TF. NCK-associated protein 1 like (nckap1l) minor splice variant regulates intrahepatic biliary network morphogenesis. PLoS Genet 2021; 17:e1009402. [PMID: 33739979 PMCID: PMC8032155 DOI: 10.1371/journal.pgen.1009402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 04/08/2021] [Accepted: 02/09/2021] [Indexed: 11/18/2022] Open
Abstract
Impaired formation of the intrahepatic biliary network leads to cholestatic liver diseases, which are frequently associated with autoimmune disorders. Using a chemical mutagenesis strategy in zebrafish combined with computational network analysis, we screened for novel genes involved in intrahepatic biliary network formation. We positionally cloned a mutation in the nckap1l gene, which encodes a cytoplasmic adaptor protein for the WAVE regulatory complex. The mutation is located in the last exon after the stop codon of the primary splice isoform, only disrupting a previously unannotated minor splice isoform, which indicates that the minor splice isoform is responsible for the intrahepatic biliary network phenotype. CRISPR/Cas9-mediated nckap1l deletion, which disrupts both the primary and minor isoforms, showed the same defects. In the liver of nckap1l mutant larvae, WAVE regulatory complex component proteins are degraded specifically in biliary epithelial cells, which line the intrahepatic biliary network, thus disrupting the actin organization of these cells. We further show that nckap1l genetically interacts with the Cdk5 pathway in biliary epithelial cells. These data together indicate that although nckap1l was previously considered to be a hematopoietic cell lineage-specific protein, its minor splice isoform acts in biliary epithelial cells to regulate intrahepatic biliary network formation.
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Affiliation(s)
- Kimia Ghaffari
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Lain X. Pierce
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Maria Roufaeil
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Isabel Gibson
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Kevin Tae
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Saswat Sahoo
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States of America
| | - James R. Cantrell
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Olov Andersson
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Jasmine Lau
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Takuya F. Sakaguchi
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States of America
- * E-mail:
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25
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Spatz LB, Jin RU, Mills JC. Cellular plasticity at the nexus of development and disease. Development 2021; 148:148/3/dev197392. [PMID: 33547203 DOI: 10.1242/dev.197392] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/05/2021] [Indexed: 12/15/2022]
Abstract
In October 2020, the Keystone Symposia Global Health Series hosted a Keystone eSymposia entitled 'Tissue Plasticity: Preservation and Alteration of Cellular Identity'. The event synthesized groundbreaking research from unusually diverse fields of study, presented in various formats, including live and virtual talks, panel discussions and interactive e-poster sessions. The meeting focused on cell identity changes and plasticity in multiple tissues, species and developmental contexts, both in homeostasis and during injury. Here, we review the key themes of the meeting: (1) cell-extrinsic drivers of plasticity; (2) epigenomic regulation of cell plasticity; and (3) conserved mechanisms governing plasticity. A salient take-home conclusion was that there may be conserved mechanisms used by cells to execute plasticity, with autodegradative activity (autophagy and lysosomes) playing a crucial initial step in diverse organs and organisms.
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Affiliation(s)
- Lillian B Spatz
- Division of Gastroenterology, Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Ramon U Jin
- Division of Oncology, Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Jason C Mills
- Division of Gastroenterology, Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63110, USA .,Department of Developmental Biology, Washington University School of Medicine, St Louis, MO 63110, USA.,Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO 63110, USA
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26
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Maladaptive regeneration - the reawakening of developmental pathways in NASH and fibrosis. Nat Rev Gastroenterol Hepatol 2021; 18:131-142. [PMID: 33051603 PMCID: PMC7854502 DOI: 10.1038/s41575-020-00365-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/28/2020] [Indexed: 02/06/2023]
Abstract
With the rapid expansion of the obesity epidemic, nonalcoholic fatty liver disease is now the most common chronic liver disease, with almost 25% global prevalence. Nonalcoholic fatty liver disease ranges in severity from simple steatosis, a benign 'pre-disease' state, to the liver injury and inflammation that characterize nonalcoholic steatohepatitis (NASH), which in turn predisposes individuals to liver fibrosis. Fibrosis is the major determinant of clinical outcomes in patients with NASH and is associated with increased risks of cirrhosis and hepatocellular carcinoma. NASH has no approved therapies, and liver fibrosis shows poor response to existing pharmacotherapy, in part due to an incomplete understanding of the underlying pathophysiology. Patient and mouse data have shown that NASH is associated with the activation of developmental pathways: Notch, Hedgehog and Hippo-YAP-TAZ. Although these evolutionarily conserved fundamental signals are known to determine liver morphogenesis during development, new data have shown a coordinated and causal role for these pathways in the liver injury response, which becomes maladaptive during obesity-associated chronic liver disease. In this Review, we discuss the aetiology of this reactivation of developmental pathways and review the cell-autonomous and cell-non-autonomous mechanisms by which developmental pathways influence disease progression. Finally, we discuss the potential prognostic and therapeutic implications of these data for NASH and liver fibrosis.
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27
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Huang Y, Sakai Y, Hara T, Katsuda T, Ochiya T, Gu WL, Miyamoto D, Hamada T, Kanetaka K, Adachi T, Eguchi S. Differentiation of chemically induced liver progenitor cells to cholangiocytes: Investigation of the optimal conditions. J Biosci Bioeng 2020; 130:545-552. [DOI: 10.1016/j.jbiosc.2020.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 06/22/2020] [Accepted: 07/11/2020] [Indexed: 12/12/2022]
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28
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Canalis E, Grossman TR, Carrer M, Schilling L, Yu J. Antisense oligonucleotides targeting Notch2 ameliorate the osteopenic phenotype in a mouse model of Hajdu-Cheney syndrome. J Biol Chem 2020; 295:3952-3964. [PMID: 31992595 PMCID: PMC7086019 DOI: 10.1074/jbc.ra119.011440] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/24/2020] [Indexed: 12/23/2022] Open
Abstract
Notch receptors play critical roles in cell-fate decisions and in the regulation of skeletal development and bone remodeling. Gain-of-function NOTCH2 mutations can cause Hajdu-Cheney syndrome, an untreatable disease characterized by osteoporosis and fractures, craniofacial developmental abnormalities, and acro-osteolysis. We have previously created a mouse model harboring a point 6955C→T mutation in the Notch2 locus upstream of the PEST domain, and we termed this model Notch2tm1.1Ecan Heterozygous Notch2tm1.1Ecan mutant mice exhibit severe cancellous and cortical bone osteopenia due to increased bone resorption. In this work, we demonstrate that the subcutaneous administration of Notch2 antisense oligonucleotides (ASO) down-regulates Notch2 and the Notch target genes Hes-related family basic helix-loop-helix transcription factor with YRPW motif 1 (Hey1), Hey2, and HeyL in skeletal tissue from Notch2tm1.1Ecan mice. Results of microcomputed tomography experiments indicated that the administration of Notch2 ASOs ameliorates the cancellous osteopenia of Notch2tm1.1Ecan mice, and bone histomorphometry analysis revealed decreased osteoclast numbers in Notch2 ASO-treated Notch2tm1.1Ecan mice. Notch2 ASOs decreased the induction of mRNA levels of TNF superfamily member 11 (Tnfsf11, encoding the osteoclastogenic protein RANKL) in cultured osteoblasts and osteocytes from Notch2tm1.1Ecan mice. Bone marrow-derived macrophage cultures from the Notch2tm1.1Ecan mice displayed enhanced osteoclastogenesis, which was suppressed by Notch2 ASOs. In conclusion, Notch2tm1.1Ecan mice exhibit cancellous bone osteopenia that can be ameliorated by systemic administration of Notch2 ASOs.
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Affiliation(s)
- Ernesto Canalis
- Department of Orthopaedic Surgery, UConn Health, Farmington, Connecticut 06030
- Department of Medicine, UConn Health, Farmington, Connecticut 06030
- UConn Musculoskeletal Institute, UConn Health, Farmington, Connecticut 06030
| | | | | | - Lauren Schilling
- UConn Musculoskeletal Institute, UConn Health, Farmington, Connecticut 06030
| | - Jungeun Yu
- Department of Orthopaedic Surgery, UConn Health, Farmington, Connecticut 06030
- UConn Musculoskeletal Institute, UConn Health, Farmington, Connecticut 06030
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29
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Western diet induces severe nonalcoholic steatohepatitis, ductular reaction, and hepatic fibrosis in liver CGI-58 knockout mice. Sci Rep 2020; 10:4701. [PMID: 32170127 PMCID: PMC7070035 DOI: 10.1038/s41598-020-61473-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 02/27/2020] [Indexed: 12/13/2022] Open
Abstract
Humans and rodents with Comparative Gene Identification-58 (CGI-58) mutations manifest nonalcoholic fatty liver disease (NAFLD). Here we show that liver CGI-58 knockout (LivKO) mice fed a Western diet rapidly develop advanced NAFLD, including nonalcoholic steatohepatitis (NASH) and hepatic fibrosis. After 14 weeks of diet challenge, starting at 6 weeks of age, LivKO mice showed increased inflammatory cell infiltration and proinflammatory gene expression in the liver, which was associated with elevated plasma levels of aminotransferases. Hepatic ductular reactions, pericellular fibrosis, and bridging fibrosis were observed only in the LivKO mice. Consistently, the KO mice had a significant increase in hepatic mRNAs for fibrogenic genes. In addition, LivKO mice displayed massive accumulation of lipid droplets (LDs) in hepatocytes. LDs were also observed in the cholangiocytes of the LivKO mice, but not the floxed controls. Four of the five LD coat proteins, including perilipins 2, 3, 4, and 5, were increased in the CGI-58 KO liver. CRISPR/Cas9-mediated knockout of CGI-58 in Huh7 human hepatoma cells induced LD deposition and perilipin expression, suggesting a cell autonomous effect. Our findings establish the Western diet-fed LivKO mice as an animal model of NASH and hepatic fibrosis. These animals may facilitate preclinical screening of therapeutic agents that counter against NAFLD progression.
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30
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Yu L, Li Y, Grisé A, Wang H. CGI-58: Versatile Regulator of Intracellular Lipid Droplet Homeostasis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1276:197-222. [PMID: 32705602 PMCID: PMC8063591 DOI: 10.1007/978-981-15-6082-8_13] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Comparative gene identification-58 (CGI-58), also known as α/β-hydrolase domain-containing 5 (ABHD5), is a member of a large family of proteins containing an α/β-hydrolase-fold. CGI-58 is well-known as the co-activator of adipose triglyceride lipase (ATGL), which is a key enzyme initiating cytosolic lipid droplet lipolysis. Mutations in either the human CGI-58 or ATGL gene cause an autosomal recessive neutral lipid storage disease, characterized by the excessive accumulation of triglyceride (TAG)-rich lipid droplets in the cytoplasm of almost all cell types. CGI-58, however, has ATGL-independent functions. Distinct phenotypes associated with CGI-58 deficiency commonly include ichthyosis (scaly dry skin), nonalcoholic steatohepatitis, and hepatic fibrosis. Through regulated interactions with multiple protein families, CGI-58 controls many metabolic and signaling pathways, such as lipid and glucose metabolism, energy balance, insulin signaling, inflammatory responses, and thermogenesis. Recent studies have shown that CGI-58 regulates the pathogenesis of common metabolic diseases in a tissue-specific manner. Future studies are needed to molecularly define ATGL-independent functions of CGI-58, including the newly identified serine protease activity of CGI-58. Elucidation of these versatile functions of CGI-58 may uncover fundamental cellular processes governing lipid and energy homeostasis, which may help develop novel approaches that counter against obesity and its associated metabolic sequelae.
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Affiliation(s)
- Liqing Yu
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Yi Li
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Alison Grisé
- College of Computer, Math, and Natural Sciences, College of Behavioral and Social Sciences, University of Maryland, College Park, MD, USA
| | - Huan Wang
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
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31
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Sato A, Kakinuma S, Miyoshi M, Kamiya A, Tsunoda T, Kaneko S, Tsuchiya J, Shimizu T, Takeichi E, Nitta S, Kawai-Kitahata F, Murakawa M, Itsui Y, Nakagawa M, Azuma S, Koshikawa N, Seiki M, Nakauchi H, Asahina Y, Watanabe M. Vasoactive Intestinal Peptide Derived From Liver Mesenchymal Cells Mediates Tight Junction Assembly in Mouse Intrahepatic Bile Ducts. Hepatol Commun 2019; 4:235-254. [PMID: 32025608 PMCID: PMC6996346 DOI: 10.1002/hep4.1459] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/23/2019] [Indexed: 01/20/2023] Open
Abstract
Formation of intrahepatic bile ducts (IHBDs) proceeds in accordance with their microenvironment. Particularly, mesenchymal cells around portal veins regulate the differentiation and ductular morphogenesis of cholangiocytes in the developing liver; however, further studies are needed to fully understand the arrangement of IHBDs into a continuous hierarchical network. This study aims to clarify the interaction between biliary and liver mesenchymal cells during IHBD formation. To identify candidate factors contributing to this cell–cell interaction, mesenchymal cells were isolated from embryonic day 16.5 matrix metalloproteinase 14 (MMP14)‐deficient (knockout [KO]) mice livers, in which IHBD formation is retarded, and compared with those of the wild type (WT). WT mesenchymal cells significantly facilitated the formation of luminal structures comprised of hepatoblast‐derived cholangiocytes (cholangiocytic cysts), whereas MMP14‐KO mesenchymal cells failed to promote cyst formation. Comprehensive analysis revealed that expression of vasoactive intestinal peptide (VIP) was significantly suppressed in MMP14‐KO mesenchymal cells. VIP and VIP receptor 1 (VIPR1) were mainly expressed in periportal mesenchymal cells and cholangiocytic progenitors during IHBD development, respectively, in vivo. VIP/VIPR1 signaling significantly encouraged cholangiocytic cyst formation and up‐regulated tight junction protein 1, cystic fibrosis transmembrane conductance regulator, and aquaporin 1, in vitro. VIP antagonist significantly suppressed the tight junction assembly and the up‐regulation of ion/water transporters during IHBD development in vivo. In a cholestatic injury model of adult mice, exogenous VIP administration promoted the restoration of damaged tight junctions in bile ducts and improved hyperbilirubinemia. Conclusion: VIP is produced by periportal mesenchymal cells during the perinatal stage. It supports bile duct development by establishing tight junctions and up‐regulating ion/water transporters in cholangiocytes. VIP contributes to prompt recovery from cholestatic damage through the establishment of tight junctions in the bile ducts.
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Affiliation(s)
- Ayako Sato
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Sei Kakinuma
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan.,Department of Liver Disease Control Tokyo Medical and Dental University (TMDU) Tokyo Japan
| | - Masato Miyoshi
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Akihide Kamiya
- Department of Molecular Life Sciences School of Medicine Tokai University Isehara Japan
| | - Tomoyuki Tsunoda
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Shun Kaneko
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Jun Tsuchiya
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Taro Shimizu
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Eiko Takeichi
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Sayuri Nitta
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Fukiko Kawai-Kitahata
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Miyako Murakawa
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Yasuhiro Itsui
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Mina Nakagawa
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Seishin Azuma
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
| | - Naohiko Koshikawa
- Division of Cancer Cell Research Institute of Medical Science University of Tokyo Tokyo Japan
| | - Motoharu Seiki
- Division of Cancer Cell Research Institute of Medical Science University of Tokyo Tokyo Japan
| | - Hiromitsu Nakauchi
- Institute for Stem Cell Biology and Regenerative Medicine Stanford University School of Medicine Stanford CA.,Division of Stem Cell Therapy Institute of Medical Science University of Tokyo Tokyo Japan
| | - Yasuhiro Asahina
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan.,Department of Liver Disease Control Tokyo Medical and Dental University (TMDU) Tokyo Japan
| | - Mamoru Watanabe
- Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan.,Advanced Research Institute Tokyo Medical and Dental University (TMDU) Tokyo Japan
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32
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Adams JM, Jafar-Nejad H. The Roles of Notch Signaling in Liver Development and Disease. Biomolecules 2019; 9:biom9100608. [PMID: 31615106 PMCID: PMC6843177 DOI: 10.3390/biom9100608] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/07/2019] [Accepted: 10/07/2019] [Indexed: 02/07/2023] Open
Abstract
The Notch signaling pathway plays major roles in organ development across animal species. In the mammalian liver, Notch has been found critical in development, regeneration and disease. In this review, we highlight the major advances in our understanding of the role of Notch activity in proper liver development and function. Specifically, we discuss the latest discoveries on how Notch, in conjunction with other signaling pathways, aids in proper liver development, regeneration and repair. In addition, we review the latest in the role of Notch signaling in the pathogenesis of liver fibrosis and chronic liver disease. Finally, recent evidence has shed light on the emerging connection between Notch signaling and glucose and lipid metabolism. We hope that highlighting the major advances in the roles of Notch signaling in the liver will stimulate further research in this exciting field and generate additional ideas for therapeutic manipulation of the Notch pathway in liver diseases.
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Affiliation(s)
- Joshua M Adams
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA.
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Hamed Jafar-Nejad
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA.
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33
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Kitade M, Kaji K, Nishimura N, Seki K, Nakanishi K, Tsuji Y, Sato S, Saikawa S, Takaya H, Kawaratani H, Namisaki T, Moriya K, Mitoro A, Yoshiji H. Blocking development of liver fibrosis augments hepatic progenitor cell-derived liver regeneration in a mouse chronic liver injury model. Hepatol Res 2019; 49:1034-1045. [PMID: 30989766 DOI: 10.1111/hepr.13351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 02/08/2023]
Abstract
AIM The roles of hepatic progenitor cells (HPCs) in regeneration of a diseased liver are unclear. Hepatic stellate cells (HSCs) contribute to liver fibrosis but are also a component of the HPC niche. Hepatic progenitor cells expand along with HSC activation and liver fibrosis. However, little is known about the interplay of liver fibrosis and HPC-mediated liver regeneration. This study aimed to investigate HSCs and HPCs in liver regeneration. METHODS Liver injury in mice was induced with 3,5-diethoxycarbonyl-1,4-dihydrocollidine, and HPC expansion and fibrosis were assessed. An angiotensin II type 1 receptor blocker (ARB) was administered to assess its effect on fibrosis and regeneration. RESULTS Treatment with ARB attenuated fibrosis and expansion of α-smooth muscle actin-positive activated HSCs as indicated by increased liver weight and Ki-67-positive hepatocytes. Immunohistochemical staining suggested that HPC differentiation was shifted toward hepatocytes (HCs) when ARB treatment decreased HPC encapsulation by HSCs and extracellular matrix. Conditioned medium produced by culturing the human HSC LX-2 line strongly augmented differentiation to biliary epithelial cells (BECs) but inhibited that to HCs. Activated HSCs expressed Jagged1, a NOTCH ligand, which plays a central role in differentiation of HPCs toward BECs. CONCLUSIONS Hepatic stellate cells, the HPC niche cells, control differentiation of HPCs, directing them toward BECs rather than HCs in a diseased liver model. Antifibrosis treatment with an ARB preferentially redirects HPC differentiation toward HCs by blocking the NOTCH pathway in the HPC niche, resulting in more efficient HPC-mediated liver regeneration.
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Affiliation(s)
- Mitsuteru Kitade
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Kosuke Kaji
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Norihisa Nishimura
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Kenichiro Seki
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Keisuke Nakanishi
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Yuki Tsuji
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Shinya Sato
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Soichiro Saikawa
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Hiroaki Takaya
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Hideto Kawaratani
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Tadashi Namisaki
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Kei Moriya
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Akira Mitoro
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
| | - Hitoshi Yoshiji
- Third Department of Internal Medicine, Nara Medical University, Nara, Japan
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34
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Van Hul N, Lendahl U, Andersson ER. Mouse Models for Diseases in the Cholangiocyte Lineage. Methods Mol Biol 2019; 1981:203-236. [PMID: 31016657 DOI: 10.1007/978-1-4939-9420-5_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cholangiopathies are an important group of liver diseases affecting the biliary system, and the purpose of this review is to describe how diseases in the biliary system can be studied in mouse models. A particular focus is placed on mouse models for Alagille syndrome, a cholangiopathy with a strong genetic link to dysfunctional Notch signaling. Recently, a number of different genetic mouse models based on various manipulations of the Notch signaling pathway have been generated to study Alagille syndrome, and we discuss the resulting phenotypes, and possible causes for the phenotypic heterogeneity among the various models. In the final section, we provide a more general discussion on how well mouse models can be expected to mimic human liver disease, as well as an outlook toward the need for new technologies that can help us to gain new insights from mouse models for liver disease.
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Affiliation(s)
- Noémi Van Hul
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Urban Lendahl
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden.
| | - Emma R Andersson
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
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35
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Lemaigre FP. Development of the Intrahepatic and Extrahepatic Biliary Tract: A Framework for Understanding Congenital Diseases. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2019; 15:1-22. [PMID: 31299162 DOI: 10.1146/annurev-pathmechdis-012418-013013] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The involvement of the biliary tract in the pathophysiology of liver diseases and the increased attention paid to bile ducts in the bioconstruction of liver tissue for regenerative therapy have fueled intense research into the fundamental mechanisms of biliary development. Here, I review the molecular, cellular and tissular mechanisms driving differentiation and morphogenesis of the intrahepatic and extrahepatic bile ducts. This review focuses on the dynamics of the transcriptional and signaling modules that promote biliary development in human and mouse liver and discusses studies in which the use of zebrafish uncovered unexplored processes in mammalian biliary development. The review concludes by providing a framework for interpreting the mechanisms that may help us understand the origin of congenital biliary diseases.
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Affiliation(s)
- Frédéric P Lemaigre
- de Duve Institute, Université Catholique de Louvain, 1200 Brussels, Belgium;
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36
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Abstract
Mouse is broadly used as a model organism to study biliary diseases. To evaluate the development and function of the biliary system, various techniques are used, including serum chemistry, histological analysis, and immunostaining for specific markers. Although these techniques can provide important information about the biliary system, they often do not present a full picture of bile duct (BD) developmental defects across the whole liver. This is in part due to the robust ability of the mouse liver to drain the bile even in animals with significant impairment in biliary development. Here we present a simple method to calculate the average number of BDs associated with each portal vein (PV) in sections covering all lobes of mutant/transgenic mice. In this method, livers are mounted and sectioned in a stereotypic manner to facilitate comparison among various genotypes and experimental conditions. BDs are identified via light microscopy of cytokeratin-stained cholangiocytes, and then counted and divided by the total number of PVs present in liver section. As an example, we show how this method can clearly distinguish between wild-type mice and a mouse model of Alagille syndrome. The method presented here cannot substitute for techniques that visualize the three-dimensional structure of the biliary tree. However, it offers an easy and direct way to quantitatively assess BD development and the degree of ductular reaction formation in mice.
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Affiliation(s)
- Joshua M Adams
- Program in Developmental Biology, Baylor College of Medicine; Medical Scientist Training Program (MSTP), Baylor College of Medicine; Department of Molecular and Human Genetics, Baylor College of Medicine
| | - Hamed Jafar-Nejad
- Program in Developmental Biology, Baylor College of Medicine; Department of Molecular and Human Genetics, Baylor College of Medicine;
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37
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Abstract
The essential liver exocrine and endocrine functions require a precise spatial arrangement of the hepatic lobule consisting of the central vein, portal vein, hepatic artery, intrahepatic bile duct system, and hepatocyte zonation. This allows blood to be carried through the liver parenchyma sampled by all hepatocytes and bile produced by the hepatocytes to be carried out of the liver through the intrahepatic bile duct system composed of cholangiocytes. The molecular orchestration of multiple signaling pathways and epigenetic factors is required to set up lineage restriction of the bipotential hepatoblast progenitor into the hepatocyte and cholangiocyte cell lineages, and to further refine cell fate heterogeneity within each cell lineage reflected in the functional heterogeneity of hepatocytes and cholangiocytes. In addition to the complex molecular regulation, there is a complicated morphogenetic choreography observed in building the refined hepatic epithelial architecture. Given the multifaceted molecular and cellular regulation, it is not surprising that impairment of any of these processes can result in acute and chronic hepatobiliary diseases. To enlighten the development of potential molecular and cellular targets for therapeutic options, an understanding of how the intricate hepatic molecular and cellular interactions are regulated is imperative. Here, we review the signaling pathways and epigenetic factors regulating hepatic cell lineages, fates, and epithelial architecture.
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Affiliation(s)
- Stacey S Huppert
- Division of Gastroenterology, Hepatology & Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States.
| | - Makiko Iwafuchi-Doi
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States; Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
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38
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YAP Activation Drives Liver Regeneration after Cholestatic Damage Induced by Rbpj Deletion. Int J Mol Sci 2018; 19:ijms19123801. [PMID: 30501048 PMCID: PMC6321044 DOI: 10.3390/ijms19123801] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 11/23/2018] [Accepted: 11/26/2018] [Indexed: 12/11/2022] Open
Abstract
Liver cholestasis is a chronic liver disease and a major health problem worldwide. Cholestasis is characterised by a decrease in bile flow due to impaired secretion by hepatocytes or by obstruction of bile flow through intra- or extrahepatic bile ducts. Thereby cholestasis can induce ductal proliferation, hepatocyte injury and liver fibrosis. Notch signalling promotes the formation and maturation of bile duct structures. Here we investigated the liver regeneration process in the context of cholestasis induced by disruption of the Notch signalling pathway. Liver-specific deletion of recombination signal binding protein for immunoglobulin kappa j region (Rbpj), which represents a key regulator of Notch signalling, induces severe cholestasis through impaired intra-hepatic bile duct (IHBD) maturation, severe necrosis and increased lethality. Deregulation of the biliary compartment and cholestasis are associated with the change of several signalling pathways including a Kyoto Encyclopedia of Genes and Genomes (KEGG) gene set representing the Hippo pathway, further yes-associated protein (YAP) activation and upregulation of SRY (sex determining region Y)-box 9 (SOX9), which is associated with transdifferentiation of hepatocytes. SOX9 upregulation in cholestatic liver injury in vitro is independent of Notch signalling. We could comprehensively address that in vivo Rbpj depletion is followed by YAP activation, which influences the transdifferentiation of hepatocytes and thereby contributing to liver regeneration.
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39
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Lewis PL, Su J, Yan M, Meng F, Glaser SS, Alpini GD, Green RM, Sosa-Pineda B, Shah RN. Complex bile duct network formation within liver decellularized extracellular matrix hydrogels. Sci Rep 2018; 8:12220. [PMID: 30111800 PMCID: PMC6093899 DOI: 10.1038/s41598-018-30433-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/30/2018] [Indexed: 02/07/2023] Open
Abstract
The biliary tree is an essential component of transplantable human liver tissue. Despite recent advances in liver tissue engineering, attempts at re-creating the intrahepatic biliary tree have not progressed significantly. The finer branches of the biliary tree are structurally and functionally complex and heterogeneous and require harnessing innate developmental processes for their regrowth. Here we demonstrate the ability of decellularized liver extracellular matrix (dECM) hydrogels to induce the in vitro formation of complex biliary networks using encapsulated immortalized mouse small biliary epithelial cells (cholangiocytes). This phenomenon is not observed using immortalized mouse large cholangiocytes, or with purified collagen 1 gels or Matrigel. We also show phenotypic stability via immunostaining for specific cholangiocyte markers. Moreover, tight junction formation and maturation was observed to occur between cholangiocytes, exhibiting polarization and transporter activity. To better define the mechanism of duct formation, we utilized three fluorescently labeled, but otherwise identical populations of cholangiocytes. The cells, in a proximity dependent manner, either branch out clonally, radiating from a single nucleation point, or assemble into multi-colored structures arising from separate populations. These findings present liver dECM as a promising biomaterial for intrahepatic bile duct tissue engineering and as a tool to study duct remodeling in vitro.
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Affiliation(s)
- Phillip L. Lewis
- 0000 0001 2299 3507grid.16753.36Biomedical Engineering, Northwestern University, Evanston, IL, USA ,0000 0001 2299 3507grid.16753.36Simpson Querrey Institute, Northwestern University, Chicago, IL, USA
| | - Jimmy Su
- 0000 0001 2299 3507grid.16753.36Biomedical Engineering, Northwestern University, Evanston, IL, USA ,0000 0001 2299 3507grid.16753.36Simpson Querrey Institute, Northwestern University, Chicago, IL, USA
| | - Ming Yan
- 0000 0001 2299 3507grid.16753.36Biomedical Engineering, Northwestern University, Evanston, IL, USA ,0000 0001 2299 3507grid.16753.36Simpson Querrey Institute, Northwestern University, Chicago, IL, USA
| | - Fanyin Meng
- 0000 0004 0420 5847grid.413775.3Research Central Texas Veterans Health Care System, Temple, TX, USA ,grid.486749.0Baylor Scott & White Health Digestive Disease Research Center, Temple, TX, USA
| | - Shannon S. Glaser
- 0000 0004 0420 5847grid.413775.3Research Central Texas Veterans Health Care System, Temple, TX, USA ,grid.486749.0Baylor Scott & White Health Digestive Disease Research Center, Temple, TX, USA ,0000 0004 4687 2082grid.264756.4Medical Physiology, Texas A&M University College of Medicine, Temple, TX, USA
| | - Gianfranco D. Alpini
- 0000 0004 0420 5847grid.413775.3Research Central Texas Veterans Health Care System, Temple, TX, USA ,grid.486749.0Baylor Scott & White Health Digestive Disease Research Center, Temple, TX, USA ,0000 0004 4687 2082grid.264756.4Medical Physiology, Texas A&M University College of Medicine, Temple, TX, USA
| | - Richard M. Green
- 0000 0001 2299 3507grid.16753.36Division of Gastroenterology and Hepatology, Northwestern University, Chicago, IL, USA
| | - Beatriz Sosa-Pineda
- 0000 0001 2299 3507grid.16753.36Nephrology, Northwestern University, Chicago, IL, USA
| | - Ramille N. Shah
- 0000 0001 2299 3507grid.16753.36Simpson Querrey Institute, Northwestern University, Chicago, IL, USA ,0000 0001 2299 3507grid.16753.36Materials Science and Engineering, Northwestern University, Evanston, IL, USA ,0000 0001 2299 3507grid.16753.36Surgery (Transplant Division), Northwestern University, Chicago, IL, USA
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40
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Yang X, He C, Zhu L, Zhao W, Li S, Xia C, Xu C. Comparative Analysis of Regulatory Role of Notch Signaling Pathway in 8 Types Liver Cell During Liver Regeneration. Biochem Genet 2018; 57:1-19. [PMID: 29961162 DOI: 10.1007/s10528-018-9869-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 06/16/2018] [Indexed: 12/18/2022]
Abstract
Notch signaling is closely related to cell proliferation, cell apoptosis, cell fate decisions, DNA damage repair, and so on. However, the exactly regulatory mechanism of Notch signaling pathway in liver regeneration (LR) remains unclear. To reveal the role of Notch signaling pathway in rat liver regeneration, Ingenuity Pathway Analysis (IPA) software and related pathway database were firstly used to construct the Notch signaling pathway in this study. Next, eight type cells with high purity were obtained by Percoll density centrifugation and immunomagnetic beads sorting. Then, the expression profiles of Notch signaling pathway-related genes in eight type cells were checked by using Rat Genome 230 2.0 Array, and the results showed that the expression of 42 genes were significantly regulated. H-cluster results showed that the hepatic stellate cells are attributed to one cluster; hepatocyte cell, oval cell, sinusoidal endothelial cell, and Kupffer cell are clustered together; and biliary epithelial cell, pit cell, and dendritic cell are one cluster. IPA software and Expression analysis systematic explorer analysis indicated that Notch signaling pathway-related genes were involved in cell proliferation, apoptosis, cell cycle, DNA damage repair, etc. In conclusion, Notch signaling pathway might regulate various physiological activities of LR through multiple pathways.
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Affiliation(s)
- Xianguang Yang
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Chuncui He
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Lin Zhu
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Weiming Zhao
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Shuaihong Li
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Cong Xia
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China.,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China
| | - Cunshuan Xu
- College of Life Science, Henan Normal University, No. 46, Constrution East Road, Xinxiang, 453007, Henan, China. .,Co-constructing Key Laboratory for Cell Differentiation Regulation, Xinxiang, 453007, China.
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41
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Zhang E, Xu Y, Yu Y, Chen S, Yu Y, Sun K. JAG1 loss‑of‑function mutations contributed to Alagille syndrome in two Chinese families. Mol Med Rep 2018; 18:2356-2364. [PMID: 29956768 DOI: 10.3892/mmr.2018.9217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 06/11/2018] [Indexed: 11/05/2022] Open
Abstract
Alagille syndrome (ALGS) is primarily caused by jagged1 (JAG1) mutations, 70% of which are protein‑truncating mutations. However, no mutation hotspots have been discovered, and the pathogenic mechanism is not fully understood. The aim of the present study was to analyze two protein‑truncating JAG1 mutations detected in three Chinese ALGS patients. Mutation c.1261delT (p.Cys421Valfs) was identified in one patient with hepatic damage, xanthomas, facial abnormalities and cardiovascular defects, which was inherited from his father. The other mutation, c.1382_1383delAC (p.Asp461Glyfs), carried by a pair of monozygotic twins with hepatic damage, facial abnormalities and cardiovascular defects, was de novo. Biological experiments were performed to study the characteristics and function of these mutations. The p.Cys421Valfs and p.Asp461Glyfs mutant proteins appeared to be truncated in western blotting using anti‑Flag bound to the N‑terminus of JAG1. The RBP‑Jκ‑responsive reporter gene assay was used to investigate the ability of mutant JAG1 proteins to activate the Notch signaling pathway. The mutant proteins had a lower luciferase activity than the wild‑type, indicating impaired transcriptional activation ability. Western blotting using soluble JAG1 from the culture medium revealed that the expression levels of the mutant proteins were lower than that of the wild‑type, suggesting that less mutant JAG1 protein underwent proteolytic cleavage than the wild‑type. In conclusion, these two loss‑of‑function JAG1 mutations may be associated with ALGS manifestations in these patients.
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Affiliation(s)
- Erge Zhang
- Department of Pediatric Cardiology, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Yuejuan Xu
- Department of Pediatric Cardiology, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Yongguo Yu
- Department of Pediatric Endocrinology and Genetics, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Sun Chen
- Department of Pediatric Cardiology, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Yu Yu
- Department of Pediatric Cardiology, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
| | - Kun Sun
- Department of Pediatric Cardiology, Shanghai Institute for Pediatric Research, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P.R. China
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42
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Abstract
The inherited diseases causing conjugated hyperbilirubinemia are diverse, with variability in clinical severity, histologic appearance, and time of onset. The liver biopsy appearances can also vary depending on whether the initial presentation is in the neonatal period or later. Although many of the disorders have specific histologic features in fully developed and classic cases, biopsies taken early in the disease course may be nonspecific, showing either cholestatic hepatitis or an obstructive pattern of injury requiring close correlation with the laboratory and clinical findings to reach the correct diagnosis. Additionally, increased understanding of the range of hepatic changes occurring in mild deficiencies of bile canalicular transporter proteins suggest that these disorders, particularly ABCB4 deficiency, may be more common than previously recognized; improved awareness should prompt further investigation.
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Affiliation(s)
- Andrew D Clouston
- Faculty of Medicine, University of Queensland, Herston Road, Brisbane, Queensland 4006, Australia.
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So J, Khaliq M, Evason K, Ninov N, Martin BL, Stainier DY, Shin D. Wnt/β-catenin signaling controls intrahepatic biliary network formation in zebrafish by regulating notch activity. Hepatology 2018; 67:2352-2366. [PMID: 29266316 PMCID: PMC5991997 DOI: 10.1002/hep.29752] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 11/10/2017] [Accepted: 12/17/2017] [Indexed: 12/27/2022]
Abstract
UNLABELLED Malformations of the intrahepatic biliary structure cause cholestasis, a liver pathology that corresponds to poor bile flow, which leads to inflammation, fibrosis, and cirrhosis. Although the specification of biliary epithelial cells (BECs) that line the bile ducts is fairly well understood, the molecular mechanisms underlying intrahepatic biliary morphogenesis remain largely unknown. Wnt/β-catenin signaling plays multiple roles in liver biology; however, its role in intrahepatic biliary morphogenesis remains unclear. Using pharmacological and genetic tools that allow one to manipulate Wnt/β-catenin signaling, we show that in zebrafish both suppression and overactivation of Wnt/β-catenin signaling impaired intrahepatic biliary morphogenesis. Hepatocytes, but not BECs, exhibited Wnt/β-catenin activity; and the global suppression of Wnt/β-catenin signaling reduced Notch activity in BECs. Hepatocyte-specific suppression of Wnt/β-catenin signaling also reduced Notch activity in BECs, indicating a cell nonautonomous role for Wnt/β-catenin signaling in regulating hepatic Notch activity. Reducing Notch activity to the same level as that observed in Wnt-suppressed livers also impaired biliary morphogenesis. Intriguingly, expression of the Notch ligand genes jag1b and jag2b in hepatocytes was reduced in Wnt-suppressed livers and enhanced in Wnt-overactivated livers, revealing their regulation by Wnt/β-catenin signaling. Importantly, restoring Notch activity rescued the biliary defects observed in Wnt-suppressed livers. CONCLUSION Wnt/β-catenin signaling cell nonautonomously controls Notch activity in BECs by regulating the expression of Notch ligand genes in hepatocytes, thereby regulating biliary morphogenesis. (Hepatology 2018;67:2352-2366).
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Affiliation(s)
- Juhoon So
- Department of Developmental Biology, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Mehwish Khaliq
- Department of Developmental Biology, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Kimberley Evason
- Department of Biochemistry and Biophysics, Programs in Developmental and Stem Cell Biology, Genetics and Human Genetics, Diabetes Center, and Liver Center, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Nikolay Ninov
- Department of Biochemistry and Biophysics, Programs in Developmental and Stem Cell Biology, Genetics and Human Genetics, Diabetes Center, and Liver Center, University of California, San Francisco, San Francisco, CA 94158, USA,Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Benjamin L. Martin
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, NY 11794, USA
| | - Didier Y.R. Stainier
- Department of Biochemistry and Biophysics, Programs in Developmental and Stem Cell Biology, Genetics and Human Genetics, Diabetes Center, and Liver Center, University of California, San Francisco, San Francisco, CA 94158, USA,Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Donghun Shin
- Department of Developmental Biology, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA,Correspondence: Donghun Shin, 3501 5 Ave. #5063 Pittsburgh, PA 15260, 1-412-624-2144 (phone), 1-412-383-2211 (fax),
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De novo formation of the biliary system by TGFβ-mediated hepatocyte transdifferentiation. Nature 2018; 557:247-251. [PMID: 29720662 PMCID: PMC6597492 DOI: 10.1038/s41586-018-0075-5] [Citation(s) in RCA: 183] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 03/22/2018] [Indexed: 12/15/2022]
Abstract
Transdifferentiation is a complete and stable change in cell identity that serves as an alternative to stem-cell-mediated organ regeneration. In adult mammals, findings of transdifferentiation have been limited to the replenishment of cells lost from preexisting structures, in the presence of a fully developed scaffold and niche1. Here we show that transdifferentiation of hepatocytes in the mouse liver can build a structure that failed to form in development-the biliary system in a mouse model that mimics the hepatic phenotype of human Alagille syndrome (ALGS)2. In these mice, hepatocytes convert into mature cholangiocytes and form bile ducts that are effective in draining bile and persist after the cholestatic liver injury is reversed, consistent with transdifferentiation. These findings redefine hepatocyte plasticity, which appeared to be limited to metaplasia, that is, incomplete and transient biliary differentiation as an adaptation to cell injury, based on previous studies in mice with a fully developed biliary system3-6. In contrast to bile duct development7-9, we show that de novo bile duct formation by hepatocyte transdifferentiation is independent of NOTCH signalling. We identify TGFβ signalling as the driver of this compensatory mechanism and show that it is active in some patients with ALGS. Furthermore, we show that TGFβ signalling can be targeted to enhance the formation of the biliary system from hepatocytes, and that the transdifferentiation-inducing signals and remodelling capacity of the bile-duct-deficient liver can be harnessed with transplanted hepatocytes. Our results define the regenerative potential of mammalian transdifferentiation and reveal opportunities for the treatment of ALGS and other cholestatic liver diseases.
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Adams JM, Jafar-Nejad H. A New Model of Alagille Syndrome With Broad Phenotypic Representation. Gastroenterology 2018; 154:803-806. [PMID: 29425927 DOI: 10.1053/j.gastro.2018.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Joshua M Adams
- Program in Developmental Biology, Medical Scientist Training Program, Baylor College of Medicine, Houston, Texas
| | - Hamed Jafar-Nejad
- Department of Molecular and Human Genetics, Program in Developmental Biology, Baylor College of Medicine, Houston, Texas.
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46
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Siebel C, Lendahl U. Notch Signaling in Development, Tissue Homeostasis, and Disease. Physiol Rev 2017; 97:1235-1294. [PMID: 28794168 DOI: 10.1152/physrev.00005.2017] [Citation(s) in RCA: 598] [Impact Index Per Article: 85.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 05/19/2017] [Accepted: 05/26/2017] [Indexed: 02/07/2023] Open
Abstract
Notch signaling is an evolutionarily highly conserved signaling mechanism, but in contrast to signaling pathways such as Wnt, Sonic Hedgehog, and BMP/TGF-β, Notch signaling occurs via cell-cell communication, where transmembrane ligands on one cell activate transmembrane receptors on a juxtaposed cell. Originally discovered through mutations in Drosophila more than 100 yr ago, and with the first Notch gene cloned more than 30 yr ago, we are still gaining new insights into the broad effects of Notch signaling in organisms across the metazoan spectrum and its requirement for normal development of most organs in the body. In this review, we provide an overview of the Notch signaling mechanism at the molecular level and discuss how the pathway, which is architecturally quite simple, is able to engage in the control of cell fates in a broad variety of cell types. We discuss the current understanding of how Notch signaling can become derailed, either by direct mutations or by aberrant regulation, and the expanding spectrum of diseases and cancers that is a consequence of Notch dysregulation. Finally, we explore the emerging field of Notch in the control of tissue homeostasis, with examples from skin, liver, lung, intestine, and the vasculature.
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Affiliation(s)
- Chris Siebel
- Department of Discovery Oncology, Genentech Inc., DNA Way, South San Francisco, California; and Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Urban Lendahl
- Department of Discovery Oncology, Genentech Inc., DNA Way, South San Francisco, California; and Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
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47
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Dimri M, Bilogan C, Pierce LX, Naegele G, Vasanji A, Gibson I, McClendon A, Tae K, Sakaguchi TF. Three-dimensional structural analysis reveals a Cdk5-mediated kinase cascade regulating hepatic biliary network branching in zebrafish. Development 2017; 144:2595-2605. [PMID: 28720653 DOI: 10.1242/dev.147397] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 05/31/2017] [Indexed: 12/17/2022]
Abstract
The intrahepatic biliary network is a highly branched three-dimensional network lined by biliary epithelial cells, but how its branching patterns are precisely established is not clear. We designed a new computer-based algorithm that quantitatively computes the structural differences of the three-dimensional networks. Utilizing the algorithm, we showed that inhibition of Cyclin-dependent kinase 5 (Cdk5) led to reduced branching in the intrahepatic biliary network in zebrafish. Further, we identified a previously unappreciated downstream kinase cascade regulated by Cdk5. Pharmacological manipulations of this downstream kinase cascade produced a crowded branching defect in the intrahepatic biliary network and influenced actin dynamics in biliary epithelial cells. We generated larvae carrying a mutation in cdk5 regulatory subunit 1a (cdk5r1a), an essential activator of Cdk5. cdk5r1a mutant larvae show similar branching defects as those observed in Cdk5 inhibitor-treated larvae. A small-molecule compound that interferes with the downstream kinase cascade rescued the mutant phenotype. These results provide new insights into branching morphogenesis of the intrahepatic biliary network.
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Affiliation(s)
- Manali Dimri
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Cassandra Bilogan
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Lain X Pierce
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Gregory Naegele
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | | | - Isabel Gibson
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Allyson McClendon
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Kevin Tae
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Takuya F Sakaguchi
- Department of Stem Cell Biology and Regenerative Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA .,Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
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Guan Y, Xu D, Garfin PM, Ehmer U, Hurwitz M, Enns G, Michie S, Wu M, Zheng M, Nishimura T, Sage J, Peltz G. Human hepatic organoids for the analysis of human genetic diseases. JCI Insight 2017; 2:94954. [PMID: 28878125 DOI: 10.1172/jci.insight.94954] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/25/2017] [Indexed: 12/31/2022] Open
Abstract
We developed an in vitro model system where induced pluripotent stem cells (iPSCs) differentiate into 3-dimensional human hepatic organoids (HOs) through stages that resemble human liver during its embryonic development. The HOs consist of hepatocytes, and cholangiocytes, which are organized into epithelia that surround the lumina of bile duct-like structures. The organoids provide a potentially new model for liver regenerative processes, and were used to characterize the effect of different JAG1 mutations that cause: (a) Alagille syndrome (ALGS), a genetic disorder where NOTCH signaling pathway mutations impair bile duct formation, which has substantial variability in its associated clinical features; and (b) Tetralogy of Fallot (TOF), which is the most common form of a complex congenital heart disease, and is associated with several different heritable disorders. Our results demonstrate how an iPSC-based organoid system can be used with genome editing technologies to characterize the pathogenetic effect of human genetic disease-causing mutations.
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Affiliation(s)
| | | | | | - Ursula Ehmer
- Department of Pediatrics.,Department of Genetics, and
| | | | | | - Sara Michie
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | | | | | - Toshihiko Nishimura
- Department of Anesthesia.,Center for the Advancement of Health and Bioscience, Sunnyvale, California, USA.,Central Institute for Experimental Animals, Tokyo, Japan
| | - Julien Sage
- Department of Pediatrics.,Department of Genetics, and
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49
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Libbrecht L, Cassiman D. Frequency and pathogenesis of central liver nodules in Alagille syndrome patients. Pediatr Radiol 2017; 47:1023-1024. [PMID: 28474254 DOI: 10.1007/s00247-017-3880-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 04/24/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Louis Libbrecht
- Liver Research Unit, University of Leuven, Leuven, Belgium.
- Department of Pathology, University Hospital Saint-Luc, Avenue Hippocrate 10, 1200, Brussels, Belgium.
| | - David Cassiman
- Liver Research Unit, University of Leuven, Leuven, Belgium
- Department of Gastroenterology and Hepatology Metabolic Center, University Hospitals Leuven, Leuven, Belgium
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50
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Nakano Y, Nakao S, Sumiyoshi H, Mikami K, Tanno Y, Sueoka M, Kasahara D, Kimura H, Moro T, Kamiya A, Hozumi K, Inagaki Y. Identification of a novel alpha-fetoprotein-expressing cell population induced by the Jagged1/Notch2 signal in murine fibrotic liver. Hepatol Commun 2017; 1:215-229. [PMID: 29404455 PMCID: PMC5721449 DOI: 10.1002/hep4.1026] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/16/2017] [Accepted: 02/21/2017] [Indexed: 12/17/2022] Open
Abstract
The liver is well known to possess high regenerative capacity in response to partial resection or tissue injury. However, liver regeneration is often impaired in the case of advanced liver fibrosis/cirrhosis when mature hepatocytes can hardly self‐proliferate. Hepatic progenitor cells have been implicated as a source of hepatocytes in regeneration of the fibrotic liver. Although alpha‐fetoprotein (AFP) is known as a clinical marker of progenitor cell induction in injured/fibrotic adult liver, the origin and features of such AFP‐producing cells are not fully understood. Here, we demonstrate a unique and distinct AFP‐expressing cell population that is induced by the Jagged1/Notch2 signal in murine fibrotic liver. Following repeated carbon tetrachloride injections, a significant number of AFP‐positive cells with high proliferative ability were observed along the fibrous septa depending on the extent of liver fibrosis. These AFP‐positive cells exhibited features of immature hepatocytes that were stained positively for hepatocyte‐lineage markers, such as albumin and hepatocyte nuclear factor 4 alpha, and a stem/progenitor cell marker Sox9. A combination of immunohistological examination of fibrotic liver tissues and coculture experiments with primary hepatocytes and hepatic stellate cells indicated that increased Jagged1 expression in activated hepatic stellate cells stimulated Notch2 signaling and up‐regulated AFP expression in adjacent hepatocytes. The mobilization and proliferation of AFP‐positive cells in fibrotic liver were further enhanced after partial hepatectomy, which was significantly suppressed in Jagged1‐conditional knockout mice. Finally, forced expression of the intracellular domain of Notch2 in normal liver induced a small number of AFP‐expressing hepatocytes in vivo. Conclusion: Insight is provided into a novel pathophysiological role of Jagged1/Notch2 signaling in the induction of AFP‐positive cells in fibrotic liver through the interaction between hepatocytes and activated hepatic stellate cells. (Hepatology Communications 2017;1:215‐229)
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Affiliation(s)
- Yasuhiro Nakano
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan
| | - Sachie Nakao
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan
| | - Hideaki Sumiyoshi
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan
| | - Kenichiro Mikami
- Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan.,Present address: Present address for Kenichiro Mikami is Department of Gastroenterology and Hematology Hirosaki University Graduate School of Medicine Hirosaki Japan
| | - Yuri Tanno
- Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan
| | - Minako Sueoka
- Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan
| | - Daigo Kasahara
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Mechanical Engineering Tokai University School of Engineering Hiratsuka Japan
| | - Hiroshi Kimura
- Department of Mechanical Engineering Tokai University School of Engineering Hiratsuka Japan
| | - Tadashi Moro
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Research Laboratory, Minophagen Pharmaceutical Co., Ltd Zama Japan
| | - Akihide Kamiya
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Molecular Life Sciences, Tokai University School of Medicine Isehara Japan
| | - Katsuto Hozumi
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Immunology Tokai University School of Medicine Isehara Japan
| | - Yutaka Inagaki
- Center for Matrix Biology and Medicine Graduate School of Medicine, Tokai University Isehara Japan.,Department of Regenerative Medicine, Tokai University School of Medicine Isehara Japan.,Institute of Medical Sciences Tokai University Isehara Japan
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