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Mavila N, Siraganahalli Eshwaraiah M, Kennedy J. Ductular Reactions in Liver Injury, Regeneration, and Disease Progression-An Overview. Cells 2024; 13:579. [PMID: 38607018 PMCID: PMC11011399 DOI: 10.3390/cells13070579] [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: 02/01/2024] [Revised: 03/11/2024] [Accepted: 03/22/2024] [Indexed: 04/13/2024] Open
Abstract
Ductular reaction (DR) is a complex cellular response that occurs in the liver during chronic injuries. DR mainly consists of hyper-proliferative or reactive cholangiocytes and, to a lesser extent, de-differentiated hepatocytes and liver progenitors presenting a close spatial interaction with periportal mesenchyme and immune cells. The underlying pathology of DRs leads to extensive tissue remodeling in chronic liver diseases. DR initiates as a tissue-regeneration mechanism in the liver; however, its close association with progressive fibrosis and inflammation in many chronic liver diseases makes it a more complicated pathological response than a simple regenerative process. An in-depth understanding of the cellular physiology of DRs and their contribution to tissue repair, inflammation, and progressive fibrosis can help scientists develop cell-type specific targeted therapies to manage liver fibrosis and chronic liver diseases effectively.
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Affiliation(s)
- Nirmala Mavila
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; (M.S.E.); (J.K.)
- Division of Applied Cell Biology and Physiology, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Mallikarjuna Siraganahalli Eshwaraiah
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; (M.S.E.); (J.K.)
| | - Jaquelene Kennedy
- Karsh Division of Gastroenterology and Hepatology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; (M.S.E.); (J.K.)
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Lv X, He Z, Yang M, Wang L, Fu S. Analysis of subsets and localization of macrophages in skin lesions and peripheral blood of patients with keloids. Heliyon 2024; 10:e24034. [PMID: 38283250 PMCID: PMC10818209 DOI: 10.1016/j.heliyon.2024.e24034] [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: 05/29/2023] [Revised: 12/19/2023] [Accepted: 01/02/2024] [Indexed: 01/30/2024] Open
Abstract
Keloids are a type of abnormal fibrous proliferation disease of the skin, characterized by local inflammation that lacks clear pathogenesis and satisfactory treatment. The phenomenon of distinct phenotypes, including M1 and M2 macrophages, is called macrophage polarization. Recently, macrophage polarization has been suggested to play a role in keloid formation. This study aimed to evaluate the relation between macrophage polarization and keloids and identify novel effective treatments for keloids. Differentially expressed genes were identified via RNA sequencing of the skin tissue of healthy controls and patients with keloids and validated using quantitative PCR. Multiplex immunofluorescence microscopy was used to detect different phenotypes of macrophages in keloid tissues. Finally, quantitative PCR validation of differentially expressed genes and flow cytometry were used to analyze macrophages in the peripheral blood of healthy controls and patients with keloids. Total and M2 macrophages were significantly increased in the local skin tissue and peripheral blood of patients with keloids compared with healthy controls. In addition, inflammation- and macrophage polarization-related differentially expressed genes in keloid tissue showed similar expression patterns in the peripheral blood. This study highlighted an increased frequency of total macrophages and M2 polarization in the local skin tissue and peripheral blood of patients with keloids. This systematic macrophage polarization tendency also indicates a potential genetic predisposition to keloids. These findings suggest the possibility of developing new diagnostic and therapeutic indicators for keloids focusing on macrophages.
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Affiliation(s)
- Xinyi Lv
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Medical Epigenomics, 139 Middle Renmin Road, Changsha, Hunan 410011, China
| | - Zhenghao He
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Medical Epigenomics, 139 Middle Renmin Road, Changsha, Hunan 410011, China
- Department of Plastic Surgery, Zhongshan City People's Hospital, Zhongshan, Guangdong, China
| | - Ming Yang
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Medical Epigenomics, 139 Middle Renmin Road, Changsha, Hunan 410011, China
| | - Lu Wang
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Medical Epigenomics, 139 Middle Renmin Road, Changsha, Hunan 410011, China
| | - Siqi Fu
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Hunan Key Laboratory of Medical Epigenomics, 139 Middle Renmin Road, Changsha, Hunan 410011, China
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3
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He YH, Pan JX, Xu LM, Gu T, Chen YW. Ductular reaction in non-alcoholic fatty liver disease: When Macbeth is perverted. World J Hepatol 2023; 15:725-740. [PMID: 37397935 PMCID: PMC10308290 DOI: 10.4254/wjh.v15.i6.725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/03/2023] [Accepted: 04/24/2023] [Indexed: 06/25/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) or metabolic (dysfunction)-associated fatty liver disease is the leading cause of chronic liver diseases defined as a disease spectrum comprising hepatic steatosis, non-alcoholic steatohepatitis (NASH), liver fibrosis, cirrhosis, and hepatic carcinoma. NASH, characterized by hepatocyte injury, steatosis, inflammation, and fibrosis, is associated with NAFLD prognosis. Ductular reaction (DR) is a common compensatory reaction associated with liver injury, which involves the hepatic progenitor cells (HPCs), hepatic stellate cells, myofibroblasts, inflammatory cells (such as macrophages), and their secreted substances. Recently, several studies have shown that the extent of DR parallels the stage of NASH and fibrosis. This review summarizes previous research on the correlation between DR and NASH, the potential interplay mechanism driving HPC differentiation, and NASH progression.
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Affiliation(s)
- Yang-Huan He
- Department of Gastroenterology and Department of Geriatrics, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Jia-Xing Pan
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Lei-Ming Xu
- Department of Gastroenterology, School of Medicine, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 200092, China
| | - Ting Gu
- Department of Gastroenterology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Yuan-Wen Chen
- Department of Gastroenterology and Department of Geriatrics, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
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Xiao Y, Guan T, Yang X, Xu J, Zhang J, Qi Q, Teng Z, Dong Y, Gao Y, Li M, Meng N, Lv P. Baicalin facilitates remyelination and suppresses neuroinflammation in rats with chronic cerebral hypoperfusion by activating Wnt/β-catenin and inhibiting NF-κB signaling. Behav Brain Res 2023; 442:114301. [PMID: 36707260 DOI: 10.1016/j.bbr.2023.114301] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/07/2023] [Accepted: 01/11/2023] [Indexed: 01/27/2023]
Abstract
One main factor contributing to the cognitive loss in vascular dementia (VD) is white matter lesions (WMLs) carried on by chronic cerebral hypoperfusion (CCH). A secondary neuroinflammatory response to CCH accelerates the loss and limits the regeneration of oligodendrocytes, leading to progressive demyelination and insufficient remyelination in the white matter. Thus, promoting remyelination and inhibiting neuroinflammation may be an ideal therapeutic strategy. Baicalin (BAI) is known to exhibit protective effects against various inflammatory and demyelinating diseases. However, whether BAI has neuroprotective effects against CCH has not been investigated. To determine whether BAI inhibits CCH-induced demyelination and neuroinflammation, we established a model of CCH in rats by occluding the two common carotid arteries bilaterally. Our results revealed that BAI could remarkably ameliorate cognitive impairment and mitigate CA1 pyramidal neuron damage and myelin loss. BAI exhibited enhancement of remyelination by increasing the expression of myelin basic protein (MBP) and oligodendrocyte transcription factor 2 (Olig2), inhibiting the loss of oligodendrocytes and promoting oligodendrocyte regeneration in the corpus callosum of CCH rats. Furthermore, BAI modified microglia polarization to the anti-inflammatory phenotype and inhibited the release of pro-inflammatory cytokines. Mechanistically, BAI treatment significantly induced phosphorylation of glycogen synthase kinase 3β (GSK3β), enhanced the expression of β-catenin and its nuclear translocation. Simultaneously, BAI reduced the expression of nuclear NF-κB. Collectively, our results suggest that BAI ameliorates cognitive impairment in CCH-induced VD rats through its pro-remyelination and anti-inflammatory capacities, possibly by activating the Wnt/β-catenin and suppressing the NF-κB signaling.
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Affiliation(s)
- Yining Xiao
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Hebei General Hospital, Shijiazhuang 050051, China
| | - Tianyuan Guan
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Xiaofeng Yang
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Pediatric Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Jing Xu
- Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Hebei General Hospital, Shijiazhuang 050051, China
| | - Jiawei Zhang
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China
| | - Qianqian Qi
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Zhenjie Teng
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Hebei General Hospital, Shijiazhuang 050051, China
| | - Yanhong Dong
- Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Hebei General Hospital, Shijiazhuang 050051, China
| | - Yaran Gao
- Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Meixi Li
- Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Nan Meng
- Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Peiyuan Lv
- Department of Neurology, Hebei Medical University, Shijiazhuang 050017, China; Department of Neurology, Hebei General Hospital, Shijiazhuang 050051, China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Hebei General Hospital, Shijiazhuang 050051, China.
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Gulati R, Johnston M, Rivas M, Cast A, Kumbaji M, Hanlon MA, Lee S, Zhou P, Lake C, Schepers E, Min K, Yoon J, Karns R, Reid LM, Lopez‐Terrada D, Timchenko L, Parameswaran S, Weirauch MT, Ranganathan S, Bondoc A, Geller J, Tiao G, Shin S, Timchenko N. β-catenin cancer-enhancing genomic regions axis is involved in the development of fibrolamellar hepatocellular carcinoma. Hepatol Commun 2022; 6:2950-2963. [PMID: 36000549 PMCID: PMC9512470 DOI: 10.1002/hep4.2055] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/27/2022] [Accepted: 07/03/2022] [Indexed: 11/24/2022] Open
Abstract
Fibrolamellar hepatocellular carcinoma (FLC) is a disease that occurs in children and young adults. The development of FLC is associated with creation of a fusion oncoprotein DNAJB1-PKAc kinase, which activates multiple cancer-associated pathways. The aim of this study was to examine the role of human genomic regions, called cancer-enhancing genomic regions or aggressive liver cancer domains (CEGRs/ALCDs), in the development of FLC. Previous studies revealed that CEGRs/ALCDs are located in multiple oncogenes and cancer-associated genes, regularly silenced in normal tissues. Using the regulatory element locus intersection (RELI) algorithm, we searched a large compendium of chromatin immunoprecipitation-sequencing (ChIP) data sets and found that CEGRs/ALCDs contain regulatory elements in several human cancers outside of pediatric hepatic neoplasms. The RELI algorithm further identified components of the β-catenin-TCF7L2/TCF4 pathway, which interacts with CEGRs/ALCDs in several human cancers. Particularly, the RELI algorithm found interactions of transcription factors and chromatin remodelers with many genes that are activated in patients with FLC. We found that these FLC-specific genes contain CEGRs/ALCDs, and that the driver of FLC, fusion oncoprotein DNAJB1-PKAc, phosphorylates β-catenin at Ser675, resulting in an increase of β-catenin-TCF7L2/TCF4 complexes. These complexes increase a large family of CEGR/ALCD-dependent collagens and oncogenes. The DNAJB1-PKAc-β-catenin-CEGR/ALCD pathway is preserved in lung metastasis. The inhibition of β-catenin in FLC organoids inhibited the expression of CEGRs/ALCDs-dependent collagens and oncogenes, preventing the formation of the organoid's structure. Conclusion: This study provides a rationale for the development of β-catenin-based therapy for patients with FLC.
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Affiliation(s)
- Ruhi Gulati
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Michael Johnston
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
- Department of SurgeryUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Maria Rivas
- Institute of BiosciencesUniversity of São PauloSão PauloBrazil
| | - Ashley Cast
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Meenasri Kumbaji
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Margaret A. Hanlon
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Sanghoon Lee
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Ping Zhou
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Charissa Lake
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Emily Schepers
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Kyung‐Won Min
- Department of BiologyGangneung‐Wonju National UniversityGangneungRepublic of Korea
| | - Je‐Hyun Yoon
- Department of Biochemistry and Molecular BiologyMedical University of South CarolinaCharlestonSouth CarolinaUSA
| | - Rebekah Karns
- Department of Gastroenterology, Hepatology and NutritionCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Lola M. Reid
- Departments of Cell Biology and PhysiologyProgram in Molecular Biology and BiotechnologyUNC School of MedicineChapel HillNorth CarolinaUSA
| | - Dolores Lopez‐Terrada
- Department of Pathology and Immunology, and Department of PediatricsBaylor College of MedicineOne Baylor PlazaHoustonTexasUSA
| | - Lubov Timchenko
- Department of NeurologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Sreeja Parameswaran
- Center for Autoimmune Genomics and EtiologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Matthew T. Weirauch
- Center for Autoimmune Genomics and EtiologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
- Divisions of Biomedical Informatics and Developmental BiologyCCHMCDepartment of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | | | - Alexander Bondoc
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - James Geller
- Department of OncologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Gregory Tiao
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
- Department of SurgeryUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Soona Shin
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
- Department of SurgeryUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
| | - Nikolai Timchenko
- Division of General and Thoracic SurgeryCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
- Department of SurgeryUniversity of Cincinnati College of MedicineCincinnatiOhioUSA
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6
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Hrncir HR, Gracz AD. Cellular and transcriptional heterogeneity in the intrahepatic biliary epithelium. GASTRO HEP ADVANCES 2022; 2:108-120. [PMID: 36593993 PMCID: PMC9802653 DOI: 10.1016/j.gastha.2022.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Epithelial tissues comprise heterogeneous cellular subpopulations, which often compartmentalize specialized functions like absorption and secretion to distinct cell types. In the liver, hepatocytes and biliary epithelial cells (BECs; also called cholangiocytes) are the two major epithelial lineages and play distinct roles in (1) metabolism, protein synthesis, detoxification, and (2) bile transport and modification, respectively. Recent technological advances, including single cell transcriptomic assays, have shed new light on well-established heterogeneity among hepatocytes, endothelial cells, and immune cells in the liver. However, a "ground truth" understanding of molecular heterogeneity in BECs has remained elusive, and the field currently lacks a set of consensus biomarkers for identifying BEC subpopulations. Here, we review long-standing definitions of BEC heterogeneity as well as emerging studies that aim to characterize BEC subpopulations using next generation single cell assays. Understanding cellular heterogeneity in the intrahepatic bile ducts holds promise for expanding our foundational mechanistic knowledge of BECs during homeostasis and disease.
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Affiliation(s)
- Hannah R Hrncir
- Department of Medicine, Division of Digestive Diseases, Emory University, Atlanta, GA
- Graduate Program in Biochemistry, Cell and Developmental Biology, Emory University, Atlanta, GA
| | - Adam D Gracz
- Department of Medicine, Division of Digestive Diseases, Emory University, Atlanta, GA
- Graduate Program in Biochemistry, Cell and Developmental Biology, Emory University, Atlanta, GA
- Graduate Program in Genetics and Molecular Biology, Emory University, Atlanta, GA
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7
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Bhattacharya R, Blankenheim Z, Scott PM, Cormier RT. CFTR and Gastrointestinal Cancers: An Update. J Pers Med 2022; 12:868. [PMID: 35743652 PMCID: PMC9224611 DOI: 10.3390/jpm12060868] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/21/2022] [Accepted: 05/23/2022] [Indexed: 11/17/2022] Open
Abstract
Cystic Fibrosis (CF) is a disease caused by mutations in the CFTR gene that severely affects the lungs as well as extra-pulmonary tissues, including the gastrointestinal (GI) tract. CFTR dysfunction resulting from either mutations or the downregulation of its expression has been shown to promote carcinogenesis. An example is the enhanced risk for several types of cancer in patients with CF, especially cancers of the GI tract. CFTR also acts as a tumor suppressor in diverse sporadic epithelial cancers in many tissues, primarily due to the silencing of CFTR expression via multiple mechanisms, but especially due to epigenetic regulation. This review provides an update on the latest research linking CFTR-deficiency to GI cancers, in both CF patients and in sporadic GI cancers, with a particular focus on cancer of the intestinal tract. It will discuss changes in the tissue landscape linked to CFTR-deficiency that may promote cancer development such as breakdowns in physical barriers, microbial dysbiosis and inflammation. It will also discuss molecular pathways and mechanisms that act upstream to modulate CFTR expression, such as by epigenetic silencing, as well as molecular pathways that act downstream of CFTR-deficiency, such as the dysregulation of the Wnt/β-catenin and NF-κB signaling pathways. Finally, it will discuss the emerging CFTR modulator drugs that have shown promising results in improving CFTR function in CF patients. The potential impact of these modulator drugs on the treatment and prevention of GI cancers can provide a new example of personalized cancer medicine.
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Affiliation(s)
| | | | - Patricia M. Scott
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA or (R.B.); (Z.B.)
| | - Robert T. Cormier
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA or (R.B.); (Z.B.)
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8
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Prasad H, Mathew JKK, Visweswariah SS. Receptor Guanylyl Cyclase C and Cyclic GMP in Health and Disease: Perspectives and Therapeutic Opportunities. Front Endocrinol (Lausanne) 2022; 13:911459. [PMID: 35846281 PMCID: PMC9276936 DOI: 10.3389/fendo.2022.911459] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/26/2022] [Indexed: 11/13/2022] Open
Abstract
Receptor Guanylyl Cyclase C (GC-C) was initially characterized as an important regulator of intestinal fluid and ion homeostasis. Recent findings demonstrate that GC-C is also causally linked to intestinal inflammation, dysbiosis, and tumorigenesis. These advances have been fueled in part by identifying mutations or changes in gene expression in GC-C or its ligands, that disrupt the delicate balance of intracellular cGMP levels and are associated with a wide range of clinical phenotypes. In this review, we highlight aspects of the current knowledge of the GC-C signaling pathway in homeostasis and disease, emphasizing recent advances in the field. The review summarizes extra gastrointestinal functions for GC-C signaling, such as appetite control, energy expenditure, visceral nociception, and behavioral processes. Recent research has expanded the homeostatic role of GC-C and implicated it in regulating the ion-microbiome-immune axis, which acts as a mechanistic driver in inflammatory bowel disease. The development of transgenic and knockout mouse models allowed for in-depth studies of GC-C and its relationship to whole-animal physiology. A deeper understanding of the various aspects of GC-C biology and their relationships with pathologies such as inflammatory bowel disease, colorectal cancer, and obesity can be leveraged to devise novel therapeutics.
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Affiliation(s)
- Hari Prasad
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bengaluru, India
| | | | - Sandhya S. Visweswariah
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bengaluru, India
- Centre for Biosystems Science and Engineering, Indian Institute of Science, Bengaluru, India
- *Correspondence: Sandhya S. Visweswariah,
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9
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Hu S, Russell JO, Liu S, Cao C, McGaughey J, Rai R, Kosar K, Tao J, Hurley E, Poddar M, Singh S, Bell A, Shin D, Raeman R, Singhi AD, Nejak-Bowen K, Ko S, Monga SP. β-Catenin-NF-κB-CFTR interactions in cholangiocytes regulate inflammation and fibrosis during ductular reaction. eLife 2021; 10:71310. [PMID: 34609282 PMCID: PMC8555990 DOI: 10.7554/elife.71310] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 10/01/2021] [Indexed: 12/13/2022] Open
Abstract
Expansion of biliary epithelial cells (BECs) during ductular reaction (DR) is observed in liver diseases including cystic fibrosis (CF), and associated with inflammation and fibrosis, albeit without complete understanding of underlying mechanism. Using two different genetic mouse knockouts of β-catenin, one with β-catenin loss is hepatocytes and BECs (KO1), and another with loss in only hepatocytes (KO2), we demonstrate disparate long-term repair after an initial injury by 2-week choline-deficient ethionine-supplemented diet. KO2 show gradual liver repopulation with BEC-derived β-catenin-positive hepatocytes and resolution of injury. KO1 showed persistent loss of β-catenin, NF-κB activation in BECs, progressive DR and fibrosis, reminiscent of CF histology. We identify interactions of β-catenin, NFκB, and CF transmembranous conductance regulator (CFTR) in BECs. Loss of CFTR or β-catenin led to NF-κB activation, DR, and inflammation. Thus, we report a novel β-catenin-NFκB-CFTR interactome in BECs, and its disruption may contribute to hepatic pathology of CF. The liver has an incredible capacity to repair itself or ‘regenerate’ – that is, it has the ability to replace damaged tissue with new tissue. In order to do this, the organ relies on hepatocytes (the cells that form the liver) and bile duct cells (the cells that form the biliary ducts) dividing and transforming into each other to repair and replace damaged tissue, in case the insult is dire. During long-lasting or chronic liver injury, bile duct cells undergo a process called ‘ductular reaction’, which causes the cells to multiply and produce proteins that stimulate inflammation, and can lead to liver scarring (fibrosis). Ductular reaction is a hallmark of severe liver disease, and different diseases exhibit ductular reactions with distinct features. For example, in cystic fibrosis, a unique type of ductular reaction occurs at late stages, accompanied by both inflammation and fibrosis. Despite the role that ductular reaction plays in liver disease, it is not well understood how it works at the molecular level. Hu et al. set out to investigate how a protein called β-catenin – which can cause many types of cells to proliferate – is involved in ductular reaction. They used three types of mice for their experiments: wild-type mice, which were not genetically modified; and two strains of genetically modified mice. One of these mutant mice did not produce β-catenin in biliary duct cells, while the other lacked β-catenin both in biliary duct cells and in hepatocytes. After a short liver injury – which Hu et al. caused by feeding the mice a specific diet – the wild-type mice were able to regenerate and repair the liver without exhibiting any ductular reaction. The mutant mice that lacked β-catenin in hepatocytes showed a temporary ductular reaction, and ultimately repaired their livers by turning bile duct cells into hepatocytes. On the other hand, the mutant mice lacking β-catenin in both hepatocytes and bile duct cells displayed sustained ductular reactions, inflammation and fibrosis, which looked like that seen in patients with liver disease associated to cystic fibrosis. Further probing showed that β-catenin interacts with a protein called CTFR, which is involved in cystic fibrosis. When bile duct cells lack either of these proteins, another protein called NF-B gets activated, which causes the ductular reaction, leading to inflammation and fibrosis. The findings of Hu et al. shed light on the role of β-catenin in ductular reaction. Further, the results show a previously unknown interaction between β-catenin, CTFR and NF-B, which could lead to better treatments for cystic fibrosis in the future.
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Affiliation(s)
- Shikai Hu
- School of Medicine, Tsinghua University, Beijing, China.,Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Jacquelyn O Russell
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Silvia Liu
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Catherine Cao
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Jackson McGaughey
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Ravi Rai
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Karis Kosar
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Junyan Tao
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Edward Hurley
- Department of Pediatrics, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Minakshi Poddar
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Sucha Singh
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Aaron Bell
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Donghun Shin
- Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Department of Developmental Biology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Reben Raeman
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Aatur D Singhi
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Kari Nejak-Bowen
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Sungjin Ko
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
| | - Satdarshan P Monga
- Department of Pathology, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Pittsburgh Liver Research Center, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States.,Department of Medicine, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center, Pittsburgh, United States
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