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Mostafa OAA, Ibrahim F, Borai E. Protective effects of hesperidin in cyclophosphamide-induced parotid toxicity in rats. Sci Rep 2023; 13:158. [PMID: 36599902 DOI: 10.1038/s41598-022-26881-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/21/2022] [Indexed: 01/05/2023] Open
Abstract
Cyclophosphamide (CYP) is an alkylating agent that is used on a wide range as a treatment of malignancies and autoimmune diseases. Previous studies have shown the promising role of hesperidin (HSP) as an antioxidant agent against various models of toxic agents. The protective effect of the HSP against CYP-induced parotid damage was evaluated in this study. Forty rats (180-200 g) were divided into four equal groups: Group I (received normal saline), Group II (HSP-treated at a dose of 100 mg/kg/day for 7 consecutive days), Group III (CYP-treated at a dose of 200 mg/kg single intraperitoneal injection on the 7th day of the experiment), Group IV (CYP + HSP); HSP-treated at a dose of 100 mg/kg/day for 7 consecutive days and CYP (200 mg/kg) single intraperitoneal injection on the 7th day of the experiment. Afterwards, the oxidative stress and inflammatory markers, the histopathological and immunohistochemical alterations of the parotid tissues in the studied groups were evaluated. CYP intoxication induced a significant parotid tissue injury represented by the elevation in the values of malondialdehyde (MDA), tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) and decrease in the catalase activity and glutathione peroxidase (GPx). Histologically, extensive histopathological alterations e.g., widely spaced serous acini with irregular shapes and congested blood vessels as well as downregulated ki-67 and alpha-smooth muscle actin (α-SMA) immunoexpression were induced by CYP. HSP administration markedly improved the biochemical and the histopathological studies. We can conclude that HSP elicited protective effects against the CYP-induced parotid toxicity.
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Affiliation(s)
- Ola A Abdelwahab Mostafa
- Department of Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, 44519, Egypt.
| | - Fatma Ibrahim
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Eman Borai
- Department of Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, 44519, Egypt
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2
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An Overview of Epithelial-to-Mesenchymal Transition and Mesenchymal-to-Epithelial Transition in Canine Tumors: How Far Have We Come? Vet Sci 2022; 10:vetsci10010019. [PMID: 36669020 PMCID: PMC9865109 DOI: 10.3390/vetsci10010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/23/2022] [Accepted: 12/24/2022] [Indexed: 12/31/2022] Open
Abstract
Historically, pre-clinical and clinical studies in human medicine have provided new insights, pushing forward the contemporary knowledge. The new results represented a motivation for investigators in specific fields of veterinary medicine, who addressed the same research topics from different perspectives in studies based on experimental and spontaneous animal disease models. The study of different pheno-genotypic contexts contributes to the confirmation of translational models of pathologic mechanisms. This review provides an overview of EMT and MET processes in both human and canine species. While human medicine rapidly advances, having a large amount of information available, veterinary medicine is not at the same level. This situation should provide motivation for the veterinary medicine research field, to apply the knowledge on humans to research in pets. By merging the knowledge of these two disciplines, better and faster results can be achieved, thus improving human and canine health.
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Abou Monsef Y, Kutsal O. Immunohistochemical evaluation of hepatic progenitor cells in different types of feline liver diseases. J Vet Med Sci 2021; 83:613-621. [PMID: 33583913 PMCID: PMC8111336 DOI: 10.1292/jvms.20-0435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Hepatic progenitor cells are periportally resident cells capable of differentiating into
mature hepatocytes or cholangiocytes to ensure hepatic regeneration. This reaction is
termed a ductular reaction. In the present study, regenerative response of the feline
liver to different hepatic diseases was investigated immunohistochemically. Regeneration
of the liver through hepatocellular replication and proliferation of progenitor cell
compartment were comparatively evaluated. Histological and immunohistochemical stainings
were conducted on feline liver samples (n=40) representing various hepatobiliary diseases.
Cytokeratin (CK) 7, CK19, Proliferating cell nuclear antigen (PCNA), Ki67, and Human
hepatocyte marker 1 (Hep Par-1) were used. The presence of progenitor cells within feline
livers was proved, both as passive cells in normal liver and as active cells (ductular
reaction) in hepatic lesions. CK7 was found to be a suitable antibody for
immunohistochemically detecting feline progenitor cells. In acute events, regeneration was
predominantly shaped by the division of hepatocytes. In chronic events and severe acute
events, hepatocytes lost their ability to divide and regeneration mainly occurred through
progenitor cells. Location of the ductular reaction varied between different hepatic
diseases. Parenchymal ductular reaction was detected in fulminant hepatitis, chronic
hepatitis, hepatocellular lipidosis and metastatic lymphoma, whereas septal ductular
reaction was detected in chronic hepatitis and metastatic lymphoma. Ductular reaction
exhibited positive staining for Hep Par-1 in chronic and severe acute events. This study
indicates the major role played by hepatic progenitor cells in regeneration of the feline
liver. Moreover, it shows how the activation pattern of ductular reaction varies according
to the hepatobiliary disease type.
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Affiliation(s)
- Yanad Abou Monsef
- Department of Pathology, Faculty of Veterinary Medicine, Ankara University, Ankara 06110, Turkey
| | - Osman Kutsal
- Department of Pathology, Faculty of Veterinary Medicine, Ankara University, Ankara 06110, Turkey
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4
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Eulenberg VM, Lidbury JA. Hepatic Fibrosis in Dogs. J Vet Intern Med 2017; 32:26-41. [PMID: 29194760 PMCID: PMC5787209 DOI: 10.1111/jvim.14891] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/17/2017] [Accepted: 10/31/2017] [Indexed: 12/19/2022] Open
Abstract
Hepatic fibrosis is commonly diagnosed in dogs, often as a sequela to chronic hepatitis (CH). The development of fibrosis is a crucial event in the progression of hepatic disease that is of prognostic value. The pathophysiology of hepatic fibrosis in human patients and rodent models has been studied extensively. Although less is known about this process in dogs, evidence suggests that fibrogenic mechanisms are similar between species and that activation of hepatic stellate cells is a key step. Diagnosis and staging of hepatic fibrosis in dogs requires histopathological examination of a liver biopsy specimen. However, performing a liver biopsy is invasive and assessment of fibrotic stage is complicated by the absence of a universally accepted staging scheme in veterinary medicine. Serum biomarkers that can discriminate among different fibrosis stages are used in human patients, but such markers must be more completely evaluated in dogs before clinical use. When successful treatment of its underlying cause is feasible, reversal of hepatic fibrosis has been shown to be possible in rodent models and human patients. Reversal of fibrosis has not been well documented in dogs, but successful treatment of CH is possible. In human medicine, better understanding of the pathomechanisms of hepatic fibrosis is leading to the development of novel treatment strategies. In time, these may be applied to dogs. This article comparatively reviews the pathogenesis of hepatic fibrosis, its diagnosis, and its treatment in dogs.
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Affiliation(s)
- V M Eulenberg
- Gastrointestinal Laboratory, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX
| | - J A Lidbury
- Gastrointestinal Laboratory, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX
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5
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Sitanggang EJ, Antarianto RD, Jusman SWA, Pawitan JA, Jusuf AA. Bone Marrow Stem Cells Anti-liver Fibrosis Potency: Inhibition of Hepatic Stellate Cells Activity and Extracellular Matrix Deposition. Int J Stem Cells 2017; 10:69-75. [PMID: 28531915 PMCID: PMC5488778 DOI: 10.15283/ijsc16048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2017] [Indexed: 01/02/2023] Open
Abstract
Transplantation of bone marrow derived stem cells (BMSCs) has been reported inhibits liver fibrosis. Several in vitro studies by co-culturing BMSCs and hepatic stellate cells (HSCs) indirectly or directly in 2D models showed inhibition of HSC as the key player in liver fibrosis. In this study, we investigated direct effect of BMSCs on HSCs by co-culturing BMSCs and HSCs in 3D model as it represents the liver microenvironment with intricate cell-cell and cell-matrix interactions. Primary isolated rat HSCs and BMSCs were directly co-cultured at 1:1 ratio with hanging drop method. The monoculture of rat HSCs served as positive control. Mono-culture and co-culture samples were harvested on day 3, 5 and 7 for histological analysis. The samples were analyzed for extracellular matrix deposition by Masson’s Trichrome staining, tenascin-C immunocytochemistry, resting HSC’s state as shown by positive Oil Red O stained cells. Our results indicated CD90+CD34− BMSCs anti-liver fibrosis potency as evidenced by higher proportion of Oil Red O-positive cells in the co-culture group compared to the monoculture group and the significant decrease in extracellular matrix deposition as well as the decrease in tenascin-C expression in the co-culture group (p<0.05) compared to the monoculture group. These findings demonstrate that BMSCs have a potential therapeutic effect against liver fibrotic process through their capacity to inhibit HSCs activation and their effect in minimizing extracellular matrix deposition.
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Affiliation(s)
| | | | - Sri Widia A Jusman
- Department of Biochemistry and Molecular Biology, Faculty of Medicine Universitas Indonesia, Jakarta
| | | | - Ahmad Aulia Jusuf
- Department of Histology, Faculty of Medicine Universitas Indonesia, Jakarta
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6
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Vince AR, Hayes MA, Jefferson BJ, Stalker MJ. Sinusoidal endothelial cell and hepatic stellate cell phenotype correlates with stage of fibrosis in chronic liver disease in dogs. J Vet Diagn Invest 2016; 28:498-505. [PMID: 27423735 DOI: 10.1177/1040638716658499] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
We evaluated the extent of hepatic fibrosis in chronic liver disease of dogs using a modification of Ishak's staging criteria for human chronic liver disease, and examined the association of stage of fibrosis with immunophenotypic markers of transdifferentiation of hepatic sinusoidal endothelial cells and hepatic stellate cells. Formalin-fixed, paraffin-embedded, hematoxylin and eosin-stained liver biopsy specimens from 45 case dogs with chronic liver disease and 55 healthy control dogs were scored for the presence and extent of fibrosis. This stage score for fibrosis strongly correlated with upregulated von Willebrand factor (vWF) expression in lobular sinusoidal endothelial cells (Spearman correlation coefficient [SCC] = 0.57, p < 0.05). Immunoreactivity for vWF factor was identified in 68.9% of case biopsies, varying in distribution from periportal to diffuse, whereas vWF immunoreactivity was identified in only 14.5% of control specimens, and was restricted to the immediate periportal sinusoids. The majority of both case and control biopsies exhibited similar prominent lobular perisinusoidal expression of alpha-smooth muscle actin (α-SMA). A minority of specimens (17.8% of case biopsies, 1.8% of control biopsies) exhibited low perisinoidal α-SMA expression, and there was a weak negative correlation between α-SMA expression and stage of fibrosis (SCC = -0.29, p = 0.0037). These results document a method for staging the severity of fibrosis in canine liver biopsies, and show a strong association between fibrosis and increased expression of vWF in hepatic sinusoidal endothelial cells.
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Affiliation(s)
- Andrew R Vince
- Animal Health Laboratory, Laboratory Services Division (Vince, Stalker), University of Guelph, Guelph, Ontario, CanadaDepartment of Pathobiology, Ontario Veterinary College (Hayes, Jefferson), University of Guelph, Guelph, Ontario, Canada
| | - M Anthony Hayes
- Animal Health Laboratory, Laboratory Services Division (Vince, Stalker), University of Guelph, Guelph, Ontario, CanadaDepartment of Pathobiology, Ontario Veterinary College (Hayes, Jefferson), University of Guelph, Guelph, Ontario, Canada
| | - Barbara J Jefferson
- Animal Health Laboratory, Laboratory Services Division (Vince, Stalker), University of Guelph, Guelph, Ontario, CanadaDepartment of Pathobiology, Ontario Veterinary College (Hayes, Jefferson), University of Guelph, Guelph, Ontario, Canada
| | - Margaret J Stalker
- Animal Health Laboratory, Laboratory Services Division (Vince, Stalker), University of Guelph, Guelph, Ontario, CanadaDepartment of Pathobiology, Ontario Veterinary College (Hayes, Jefferson), University of Guelph, Guelph, Ontario, Canada
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Madeira IMVM, Pereira DMO, Sousa AA, Vilela CA, Amorim IFG, Caliari MV, Souza CC, Tafuri WL. Immunohistochemical study of hepatic fibropoiesis associated with canine visceral leishmaniasis. Int J Exp Pathol 2016; 97:139-49. [PMID: 27242326 DOI: 10.1111/iep.12179] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 02/13/2016] [Indexed: 12/26/2022] Open
Abstract
Hepatic fibropoiesis has been confirmed in canine visceral leishmaniasis. In fibrotic disease, hepatic stellate cells (HSC) play an important role in fibropoiesis, undergoing activation by TGF-β to acquire characteristics of myofibroblasts. These cells show extensive capacity for proliferation, motility, contractility, collagen synthesis and extracellular matrix component synthesis. The aim of this work was to identify markers of HSC activation in 10 symptomatic and 10 asymptomatic dogs naturally infected with Leishmania (Leishmania) infantum. Eight uninfected dogs were used as controls. Alpha-actin (α-SMA), vimentin and cytokeratin were investigated by immunohistochemistry as HSC markers. The cytokine TGF-β in tissue was also evaluated by immunohistochemistry. All infected dogs showed higher numbers of reticular fibres than controls. Fibropoiesis found in infected dogs was always associated with the presence of parasites and chronic granulomatous hepatitis. Positive correlation was found among fibropoiesis, parasite tissue load and expression of α-SMA. There was no correlation between fibropoiesis, vimentin and cytokeratin markers. The expression of cytokine TGF-β was higher in infected dogs than in controls, but not significantly different between symptomatic and asymptomatic dogs. These results confirm previous work describing the intense hepatic fibropoiesis in dogs naturally infected with Leishmania infantum, but now associated them with overexpression of TGF-β, where α-SMA may be a superior marker for activated HSC cells in CVL.
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Affiliation(s)
- Igor M V M Madeira
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Debora M O Pereira
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Aline A Sousa
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Cesar A Vilela
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Izabela F G Amorim
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Marcelo V Caliari
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Carolina C Souza
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
| | - Wagner L Tafuri
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
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8
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Antihydatic and immunomodulatory effects of Punica granatum peel aqueous extract in a murine model of echinococcosis. ASIAN PAC J TROP MED 2016; 9:211-20. [PMID: 26972390 DOI: 10.1016/j.apjtm.2016.01.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 12/20/2015] [Accepted: 12/30/2015] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE To investigate the effect of pomegranate peel aqueous extract (PGE) on the development of secondary experimental echinococcosis and on the viability of Echinococcus granulosus protoscoleces, and the immunomodulatory properties of PGE. METHODS Swiss mice were inoculated intraperitoneally with viable protoscoleces. Then, PGE was orally administered daily during cystic echinococcosis development. Cyst development and hepatic damage were macroscopically and histologically analyzed. The production of nitric oxide and TNF-α was assessed in plasma and the hepatic expression of iNOS, TNF-α, NF-κB and CD68 was examined. Moreover, protoscoleces were cultured and treated with different concentrations of PGE. RESULTS It was observed that in vitro treatment of protoscoleces caused a significant decrease in viability in a PGE-dose-dependent manner. In vivo, after treatment of cystic echinococcosis infected mice with PGE, a significant decrease in nitric oxide levels (P < 0.0001) and TNF-α levels (P < 0.001) was observed. This decline was strongly related to the inhibition of cyst development (rate of hydatid cyst growth inhibition = 63.08%) and a decrease in CD68 expression in both the pericystic layer of hepatic hydatid cysts and liver tissue (P < 0.0001). A significant diminution of iNOS, TNF-α and NF-κB expression was also observed in liver tissue of treated mice (P < 0.0001). CONCLUSIONS Our results indicate an antihydatic scolicidal effect and immunomodulatory properties of PGE, suggesting its potential therapeutic role against Echinococcus granulosus infection.
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Benbow JH, Thompson KJ, Cope HL, Brandon-Warner E, Culberson CR, Bossi KL, Li T, Russo MW, Gersin KS, McKillop IH, deLemos AS, Schrum LW. Diet-Induced Obesity Enhances Progression of Hepatocellular Carcinoma through Tenascin-C/Toll-Like Receptor 4 Signaling. THE AMERICAN JOURNAL OF PATHOLOGY 2015; 186:145-58. [PMID: 26603137 DOI: 10.1016/j.ajpath.2015.09.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 08/12/2015] [Accepted: 09/10/2015] [Indexed: 02/06/2023]
Abstract
Obesity is an independent risk factor for the development of liver fibrosis/cirrhosis and hepatocellular carcinoma (HCC). Tenascin-C (TnC), an extracellular matrix protein, is transiently expressed during tissue injury and plays a role in fibrogenesis and tumorigenesis. However, the mechanistic role of TnC signaling in the development of HCC remains unknown. We developed a diet-induced obesity HCC mouse model and examined TnC expression and liver injury. To determine the cellular mechanism of TnC signaling in promoting inflammation and hepatocyte epithelial-mesenchymal transition and migration, we used primary hepatocytes and hepatoma and macrophage cell lines. Further, to determine whether elevated TnC expression correlated with obesity-associated HCC, we measured plasma TnC in obese patients with various levels of liver injury. Increased tissue inflammation accompanied with elevated hepatic stellate cell-derived TnC and Toll-like receptor 4 expression was observed in the diet-induced obesity HCC animal model. In vitro studies found enhanced Toll-like receptor 4 signaling activated by TnC, promoting an increased inflammatory response, hepatocyte transformation, and migration. Further, obese patients with cirrhosis alone and in combination with HCC showed significant increases in plasma TnC compared with healthy volunteers and patients with less severe liver injury. Overall, these studies suggest TnC/Toll-like receptor 4 signaling as an important regulator in HCC; inhibiting this signaling axis may be a viable therapeutic target for impeding HCC.
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Affiliation(s)
- Jennifer H Benbow
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina
| | - Kyle J Thompson
- Department of Surgery, Carolinas Medical Center, Charlotte, North Carolina
| | - Heidi L Cope
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina
| | - Elizabeth Brandon-Warner
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina
| | - Catherine R Culberson
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina
| | - Krista L Bossi
- Center for Liver Diseases and Liver Transplant, Carolinas Medical Center, Charlotte, North Carolina
| | - Ting Li
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina
| | - Mark W Russo
- Center for Liver Diseases and Liver Transplant, Carolinas Medical Center, Charlotte, North Carolina
| | - Keith S Gersin
- Department of Surgery, Carolinas Medical Center, Charlotte, North Carolina
| | - Iain H McKillop
- Department of Surgery, Carolinas Medical Center, Charlotte, North Carolina
| | - Andrew S deLemos
- Center for Liver Diseases and Liver Transplant, Carolinas Medical Center, Charlotte, North Carolina
| | - Laura W Schrum
- Department of Internal Medicine, Liver Pathobiology Laboratory, Carolinas Medical Center, Charlotte, North Carolina.
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Kukolj V, Aleksić-Kovačević S, Katić-Radivojević S, Knežević D, Jovanović M. The role and immunophenotypic characteristics of myofibroblasts in liver of sheep naturally infected with the lancet liver fluke (Dicrocoelium dendriticum). Vet Parasitol 2015; 208:181-9. [DOI: 10.1016/j.vetpar.2015.01.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 01/16/2015] [Accepted: 01/25/2015] [Indexed: 12/12/2022]
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Hassanin A, Malek HA, Saleh D. Heparin modulation on hepatic nitric oxide synthase in experimental steatohepatitis. Exp Ther Med 2014; 8:1551-1558. [PMID: 25289058 PMCID: PMC4186392 DOI: 10.3892/etm.2014.1963] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 07/21/2014] [Indexed: 01/02/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is considered to be a hepatic manifestation of metabolic syndrome, and has been etiologically associated with insulin resistance (IR). The histopathology of NAFLD ranges between simple steatosis and nonalcoholic steatohepatitis (NASH), with or without fibrosis. The aim of the present study was to examine the effect of heparin on steatohepatitis and hepatic-induced nitric oxide synthase (iNOS) expression in mice. Male mice were divided into four groups, which included the normal basal diet (control), high fat (HF) diet, HF diet + heparin (treatment group) and heparin control groups. After eight weeks from the initiation of the experiment, blood was collected and livers were harvested for biochemical analysis and histological studies. Serum levels of aspartate aminotransferase, alanine aminotransferase, hepatic triglyceride (TG) and hydroxyproline, as well as the IR, superoxide anion generation and mRNA expression of the hepatic iNOS enzyme were evaluated. Liver specimens were processed for histopathological and immunohistopathological evaluation. Heparin administration decreased the levels of the liver enzymes, IR, superoxide generation, hepatic TG, hydroxyproline and iNOS expression when compared with the HF diet group. These changes were associated with an improvement in inflammation and fibrosis observed via histopathological examination. Therefore, heparin treatment attenuates hepatic injury in steatohepatitis.
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Affiliation(s)
- Amal Hassanin
- Department of Clinical Pharmacology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Hala Abdel Malek
- Department of Clinical Pharmacology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Dalia Saleh
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
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12
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Kruitwagen HS, Spee B, Schotanus BA. Hepatic progenitor cells in canine and feline medicine: potential for regenerative strategies. BMC Vet Res 2014; 10:137. [PMID: 24946932 PMCID: PMC4089933 DOI: 10.1186/1746-6148-10-137] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 12/31/2013] [Indexed: 12/17/2022] Open
Abstract
New curative therapies for severe liver disease are urgently needed in both the human and veterinary clinic. It is important to find new treatment modalities which aim to compensate for the loss of parenchymal tissue and to repopulate the liver with healthy hepatocytes. A prime focus in regenerative medicine of the liver is the use of adult liver stem cells, or hepatic progenitor cells (HPCs), for functional recovery of liver disease. This review describes recent developments in HPC research in dog and cat and compares these findings to experimental rodent studies and human pathology. Specifically, the role of HPCs in liver regeneration, key components of the HPC niche, and HPC activation in specific types of canine and feline liver disease will be reviewed. Finally, the potential applications of HPCs in regenerative medicine of the liver are discussed and a potential role is suggested for dogs as first target species for HPC-based trials.
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Affiliation(s)
- Hedwig S Kruitwagen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM, Utrecht, The Netherlands.
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13
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Kruitwagen HS, Spee B, Viebahn CS, Venema HB, Penning LC, Grinwis GCM, Favier RP, van den Ingh TSGAM, Rothuizen J, Schotanus BA. The canine hepatic progenitor cell niche: molecular characterisation in health and disease. Vet J 2014; 201:345-52. [PMID: 24923752 DOI: 10.1016/j.tvjl.2014.05.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 05/07/2014] [Accepted: 05/17/2014] [Indexed: 12/24/2022]
Abstract
Hepatic progenitor cells (HPCs) are an adult stem cell compartment in the liver that contributes to liver regeneration when replication of mature hepatocytes is insufficient. In this study, laser microdissection was used to isolate HPC niches from the livers of healthy dogs and dogs with lobular dissecting hepatitis (LDH), in which HPCs are massively activated. Gene expression of HPC, hepatocyte and biliary markers was determined by quantitative reverse transcriptase PCR. Expression and localisation of selected markers were further studied at the protein level by immunohistochemistry and immunofluorescent double staining in samples of normal liver and liver from dogs with LDH, acute and chronic hepatitis, and extrahepatic cholestasis. Activated HPC niches had higher gene expression of the hepatic progenitor markers OPN, FN14, CD29, CD44, CD133, LIF, LIFR and BMI1 compared to HPCs from normal liver. There was lower expression of albumin, but activated HPC niches were positive for the biliary markers SOX9, HNF1β and keratin 19 by immunohistochemistry and immunofluorescence. Laminin, activated stellate cells and macrophages are abundant extracellular matrix and cellular components of the canine HPC niche. This study demonstrates that the molecular and cellular characteristics of canine HPCs are similar to rodent and human HPCs, and that canine HPCs are distinctively activated in different types of liver disease.
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Affiliation(s)
- H S Kruitwagen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - B Spee
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - C S Viebahn
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - H B Venema
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - L C Penning
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - G C M Grinwis
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - R P Favier
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | | | - J Rothuizen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - B A Schotanus
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands.
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Marinković D, Kukolj V, Aleksić-Kovačević S, Jovanović M, Knežević M. The role of hepatic myofibroblasts in liver cirrhosis in fallow deer (Dama dama) naturally infected with giant liver fluke (Fascioloides magna). BMC Vet Res 2013; 9:45. [PMID: 23497565 PMCID: PMC3614467 DOI: 10.1186/1746-6148-9-45] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 02/20/2013] [Indexed: 12/02/2022] Open
Abstract
Background This paper describes liver cirrhosis in 35 fallow deer infected with the giant liver fluke, as well as the distribution, origin, and role of myofibroblasts in its development. Results In liver of infected deer, stripes of connective tissue are wound around groups of degenerated and regenerated liver lobuli. In the connective tissue, lymphocytes and macrophages which often contain parasite hematin are also present. The walls of the bile ducts are thickened, the epithelium multiplied with mucous metaplasia, and desquamated cells, parasite eggs and brown pigment are present in their lumen. In the livers with cirrhosis, immunopositivity to α-SMA and desmin was observed in cells in portal and septal spaces, at the edge between fibrotic septa and the surrounding parenchyma and in perisinusoidal spaces. These cells vary in size, they are round, oval, spindle-shaped or irregular in shape, similar to vascular smooth muscle cells. The derangement of epithelial-mesenchymal interactions detected in chronic cholangiopathies is most probably the pro-fibrogenic mechanism in liver cirrhosis of fallow deer (Dama dama) infected with the giant liver fluke (Fascioloides magna). Conclusion Myofibroblasts, especially hepatic stellate cells (HSCs), play an important role in the synthesis of extracellular matrix components in the development of parasitic fibrosis and cirrhosis in the liver of fallow deer.
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Affiliation(s)
- Darko Marinković
- Department of Pathology, Faculty of Veterinary Medicine, Univeristy of Belgrade, Bulevar oslobodjenja 18, Belgrade, Serbia.
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Liver. CANINE AND FELINE GASTROENTEROLOGY 2013. [PMCID: PMC7161409 DOI: 10.1016/b978-1-4160-3661-6.00061-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Mizooku H, Kagawa Y, Matsuda K, Okamoto M, Taniyama H. Histological and immunohistochemical evaluations of lobular dissecting hepatitis in American cocker spaniel dogs. J Vet Med Sci 2012; 75:597-603. [PMID: 23292109 DOI: 10.1292/jvms.12-0447] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Histological and immunohistochemical evaluations of lobular dissecting hepatitis (LDH) were performed in nine American cocker spaniel dogs. Histological examination showed diffuse fibrosis with weak inflammatory reaction of extensive neutrophils, macrophages, lymphocytes and plasma cells. Immunohistochemical examination revealed that the myofibroblastic cells positive for anti-α-smooth muscle actin and anti-vimentin antibodies produced reticular and collagen fibers and brought about the dissection of hepatic cords and diffuse disappearance of hepatocytes. Reticular fibers invading between hepatocytes and the surrounding small group of hepatocytes were strongly positive for anti-collagen type III and anti-collagen type IV antibodies. The positivity to anti-fibronectin and anti-laminin antibodies was frequently continuous on the basement membrane of the sinusoids of the remaining hepatic cords and between the hepatocytes. Positive findings for anti-E-cadherin antibody were not observed between the hepatocytes showing positive findings for anti-collagen type III and anti-collagen type IV antibodies. These results may explain the expression of fibronectin and laminin that occurs prior to the invasion of reticular fibers between hepatocytes. The present study further suggests that expression of an extracellular matrix mainly containing fibronectin and laminin between the hepatocytes and proliferation of collagen fibers and reticular fibers have a major role in the rupture of the hepatic cords and disappearance of hepatocytes.
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Affiliation(s)
- Hiroko Mizooku
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, 582-1 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
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Lymphocytic Hypophysitis in a Dog with Diabetes Insipidus. J Comp Pathol 2012; 147:503-7. [DOI: 10.1016/j.jcpa.2012.04.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 03/19/2012] [Accepted: 04/28/2012] [Indexed: 11/18/2022]
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Favier RP, Spee B, Schotanus BA, van den Ingh TSGAM, Fieten H, Brinkhof B, Viebahn CS, Penning LC, Rothuizen J. COMMD1-deficient dogs accumulate copper in hepatocytes and provide a good model for chronic hepatitis and fibrosis. PLoS One 2012; 7:e42158. [PMID: 22879914 PMCID: PMC3412840 DOI: 10.1371/journal.pone.0042158] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 07/02/2012] [Indexed: 12/21/2022] Open
Abstract
New therapeutic concepts developed in rodent models should ideally be evaluated in large animal models prior to human clinical application. COMMD1-deficiency in dogs leads to hepatic copper accumulation and chronic hepatitis representing a Wilson’s disease like phenotype. Detailed understanding of the pathogenesis and time course of this animal model is required to test its feasibility as a large animal model for chronic hepatitis. In addition to mouse models, true longitudinal studies are possible due to the size of these dogs permitting detailed analysis of the sequence of events from initial insult to final cirrhosis. Therefore, liver biopsies were taken each half year from five new born COMMD1-deficient dogs over a period of 42 months. Biopsies were used for H&E, reticulin, and rubeanic acid (copper) staining. Immunohistochemistry was performed on hepatic stellate cell (HSC) activation marker (alpha-smooth muscle actin, α-SMA), proliferation (Ki67), apoptosis (caspase-3), and bile duct and liver progenitor cell (LPC) markers keratin (K) 19 and 7. Quantitative RT-PCR and Western Blots were performed on gene products involved in the regenerative and fibrotic pathways. Maximum copper accumulation was reached at 12 months of age, which coincided with the first signs of hepatitis. HSCs were activated (α-SMA) from 18 months onwards, with increasing reticulin deposition and hepatocytic proliferation in later stages. Hepatitis and caspase-3 activity (first noticed at 18 months) increased over time. Both HGF and TGF-β1 gene expression peaked at 24 months, and thereafter decreased gradually. Both STAT3 and c-MET showed an increased time-dependent activation. Smad2/3 phosphorylation, indicative for fibrogenesis, was present at all time-points. COMMD1-deficient dogs develop chronic liver disease and cirrhosis comparable to human chronic hepatitis, although at much higher pace. Therefore they represent a genetically-defined large animal model to test clinical applicability of new therapeutics developed in rodent models.
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Affiliation(s)
- Robert P Favier
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
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Tenascin-C in chronic sclerosing sialadenitis. Head Neck Pathol 2011; 5:221-5. [PMID: 21559807 PMCID: PMC3173529 DOI: 10.1007/s12105-011-0265-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 04/15/2011] [Indexed: 10/18/2022]
Abstract
Tenascin-C is an extracellular matrix glycoprotein that has been implicated in the development of fibrosis in certain chronic inflammatory/sclerosing conditions. This study was undertaken to expand our understanding of the processes involved in fibrosis that occurs in chronic sclerosing sialadenitis (CSS) by investigating the distribution of tenascin-C. Fifteen specimens of CSS with varying degrees of fibrosis and five normal submandibular glands were retrospectively examined immunohistochemically for the distribution of TNC. Linear deposition of TNC was found around collecting ducts in normal glands and around collecting ducts without surrounding fibrotic tissue in CSS; percentage incidences were not statistically different. In contrast, broader, band-like deposition of TNC was found in the fibrous tissue around collecting ducts in CSS with widespread degree of fibrosis compared to little or no fibrosis; the percentage incidence was statistically different. In addition, deposition of TNC was found around duct-like structures and extremely atrophic acini but, interestingly, however, was not found in fibrotic interlobular septa. The results of this investigation suggest that TNC is likely involved in the fibrosis that occurs around collecting ducts in CSS.
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Cogliati B, Aloia TPA, Bosch RV, Alves VAF, Hernandez-Blazquez FJ, Dagli MLZ. Identification of hepatic stem/progenitor cells in canine hepatocellular and cholangiocellular carcinoma. Vet Comp Oncol 2010; 8:112-21. [DOI: 10.1111/j.1476-5829.2010.00210.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kim PJ, Hong DG, Park JY, Cho YL, Park IS, Lee YS. Immunohistochemical expression of YKL-40 in peritoneal endometriosis. Gynecol Endocrinol 2010; 26:58-62. [PMID: 19701838 DOI: 10.3109/09513590903184068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
AIMS To evaluate the relationship between the immunohistochemical expression of YKL-40 and peritoneal endometriosis by using paraffinized peritoneal tissue blocks. METHODS AND MATERIALS We retrospectively collected data from 27 patients whose pathologic reports indicated invasion of the peritoneum by endometriosis. A conventional peroxidase staining technique was performed using rabbit polyclonal antibody (Quidel corporation, Santa Clara, CA) on peritoneal tissue blocks; their histology was then reviewed by a pathologist, and data were analyzed by nonparametric and Mann-Whitney tests. RESULTS YKL-40 was detected immunohistochemically in 17 (63%) of 27 cases. The number of biopsies which were invaded by endometriosis (P = 0.015), with a score based on the revised classification of endometriosis (American Society for Reproductive Medicine) had statistical significance (P = 0.001). The obstetric history, age, body mass index, severity, and occurrence of dysmenorrhea, menstrual phase, preoperative CA 125, erythrocyte sedimentation rate, and white blood cell count had no statistical significance. YKL-40 immunoreactivity was recognized as brown staining, localized to the cytoplasm of epithelial cells of endometrial gland in peritoneal endometriosis. There was no positive staining on endometrial stromal cells or smooth muscle cells. CONCLUSIONS YKL-40 is related to severity of peritoneal endometriosis. However why a different expression level of immunohistochemical staining should occur is not known and needs further investigation.
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Affiliation(s)
- Pan Jo Kim
- Department of Obstetrics and Gynecology, Kyungpook National University, Graduate School Of Medicine, Daegu, Korea
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Role of hepatic stellate cells (HSCs) in the development of hepatic fibrosis in cats with polycystic kidney disease (PKD). ACTA VET-BEOGRAD 2010. [DOI: 10.2298/avb1004391a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Hoffmann G, Ijzer J, Brinkhof B, Schotanus BA, van den Ingh TSGAM, Penning LC, Rothuizen J. Comparison of different methods to obtain and store liver biopsies for molecular and histological research. COMPARATIVE HEPATOLOGY 2009; 8:3. [PMID: 19586524 PMCID: PMC2717914 DOI: 10.1186/1476-5926-8-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2009] [Accepted: 07/08/2009] [Indexed: 11/16/2022]
Abstract
Background To minimize the necessary number of biopsies for molecular and histological research we evaluated different sampling techniques, fixation methods, and storage procedures for canine liver tissue. For addressing the aim, three biopsy techniques (wedge biopsy, Menghini, True-cut), four storage methods for retrieval of RNA (snap freezing, RNAlater, Boonfix, RLT-buffer), two RNA isolation procedures (Trizol and RNAeasy), and three different fixation protocols for histological studies (10% buffered formalin, RNAlater, Boonfix) were compared. Histological evaluation was based on hematoxylin-eosin (HE) and reticulin (fibrogenesis) staining, and rubeanic acid and rhodanine stains for copper. Immunohistochemical evaluation was performed for cytokeratin-7 (K-7), multidrug resistance binding protein-2 (MRP-2) and Hepar-1. Results RNA quality was best guaranteed by the combination of a Menghini biopsy with NaCl, followed by RNAlater preservation and RNAeasy mini kit extraction. These results were confirmed by quantitative RT-PCR testing. Reliable histological assessment for copper proved only possible in formalin fixed liver tissue. Short formalin fixation (1–4 hrs) improved immunohistochemical reactivity and preservation of good morphology in small liver biopsies. Conclusion At least two biopsies (RNAlater and formalin) are needed. Since human and canine liver diseases are highly comparable, it is conceivable that the protocols described here can be easily translated into the human biomedical field.
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Affiliation(s)
- Gaby Hoffmann
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, University Utrecht, Yalelaan 104, 3584 CM Utrecht, the Netherlands.
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Arends B, Vankelecom H, Vander Borght S, Roskams T, Penning LC, Rothuizen J, Spee B. The dog liver contains a "side population" of cells with hepatic progenitor-like characteristics. Stem Cells Dev 2009; 18:343-50. [PMID: 18680393 DOI: 10.1089/scd.2008.0022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to isolate and characterize potential progenitor cells from healthy dog livers. Stem/progenitor cells can be prospectively isolated from a diversity of tissues using their ability to efficiently pump out the dye Hoechst33342, thereby portraying a side population (SP) in dual-wavelength flow cytometry. We here describe the detection of a SP in dog liver, constituting approximately 3 % of the nonparenchymal-enriched cell fractions. A subpopulation of the SP (approximately 30 %) was immunonegative for the panhematopoietic marker CD45, and consisted predominantly of small, mononuclear, keratin 7-immunoreactive cells; characteristics suggestive of a liver progenitor cell phenotype. Both the CD45- and CD45+ SP showed upregulated expression of progenitor/cholangiocyte marker genes, but also low-level expression of hepatocyte markers, suggesting the presence of progenitor cells committed to the hepatic lineage in both SP fractions. Our findings demonstrate that healthy canine liver contains a small population of cells with progenitor-like characteristics that can be isolated on the basis of efficient Hoechst33342 expulsion.
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Affiliation(s)
- Brigitte Arends
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, The Netherlands
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Arends B, Spee B, Schotanus BA, Roskams T, van den Ingh TSGAM, Penning LC, Rothuizen J. In vitro differentiation of liver progenitor cells derived from healthy dog livers. Stem Cells Dev 2009; 18:351-8. [PMID: 18454698 DOI: 10.1089/scd.2008.0043] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Naturally occurring liver disease in dogs resemble human liver disease in great detail; including the activation of liver progenitor cells (LPC) in acute and chronic liver disease. The aim of the present study was to isolate, culture, and characterize progenitor cells derived from healthy mature dog livers. A nonparenchymal cell fraction enriched with small hepatocytes was isolated and cultured in Hepatozyme-serum-free media (SFM) to stimulate the growth of colony-forming small epithelial cells. After 2 weeks of culturing, clonal expansion of keratin 7 (K7) immunopositive small cells with a large nucleus/cytoplasm ratio emerged in the hepatocyte monolayer. These colonies expressed genes of several hepatocyte (CYP1A1, ALB, and KRT18), cholangiocyte/LPC (KRT7 and KRT19), and progenitor cell markers (alpha-fetoprotein, CD44, prominin1, KIT, THY1, and neural cell adhesion molecule 1), indicating their immature and bipotential nature. Gene-expression profiles indicated a more pronounced hepatic differentiation in Hepatozyme-SFM compared to William's Medium E (WME). Furthermore, colony-forming cells differentiated toward intermediate hepatocyte-like cells with a more pronounced membranous K7 immunostaining. In conclusion, colony-forming small epithelial cells in long-term canine liver cell cultures express LPC markers and have differentiating capacities. These cells may therefore be considered as progenitor cells of the liver.
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Affiliation(s)
- Brigitte Arends
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, The Netherlands.
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