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Hepatic stellate cells

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https://www.readbyqxmd.com/read/29150843/liver-fibrosis-is-associated-with-cutaneous-inflammation-in-the-imiquimod-induced-murine-model-of-psoriasiform-dermatitis
#1
P Vasseur, M Pohin, J F Jégou, L Favot, N Venisse, J Mcheik, F Morel, J C Lecron, C Silvain
BACKGROUND: Psoriasis associates several extra-cutaneous manifestations. Little is known about hepatic parameters specifically associated with psoriasis. OBJECTIVE: To study whether psoriasiform dermatitis is associated with liver injury. METHODS: We studied liver parameters of inflammation and fibrosis in a murine model of psoriasiform dermatitis induced by topical application of imiquimod for nine weeks. RESULTS: Topical treatment with imiquimod induced a form of psoriasiform dermatitis reminiscent of the human disorder, characterized by thickened and scaly skin, psoriasiform epidermal hyperplasia, altered keratinocyte differentiation, and cutaneous overexpression of interleukin-17A...
November 18, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/29150621/pnpla3-variant-and-portal-periportal-histological-pattern-in-patients-with-biopsy-proven-non-alcoholic-fatty-liver-disease-a-possible-role-for-oxidative-stress
#2
Guido Carpino, Daniele Pastori, Francesco Baratta, Diletta Overi, Giancarlo Labbadia, Licia Polimeni, Alessia Di Costanzo, Gaetano Pannitteri, Roberto Carnevale, Maria Del Ben, Marcello Arca, Francesco Violi, Francesco Angelico, Eugenio Gaudio
Pathogenesis of non-alcoholic fatty liver disease (NAFLD) is influenced by predisposing genetic variations, dysmetabolism, systemic oxidative stress, and local cellular and molecular cross-talks. Patatin-like phospholipase domain containing 3 (PNPLA3) gene I148M variant is a known determinant of NAFLD. Aims were to evaluate whether PNPLA3 I148M variant was associated with a specific histological pattern, hepatic stem/progenitor cell (HpSC) niche activation and serum oxidative stress markers. Liver biopsies were obtained from 54 NAFLD patients...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29148802/ppb-peptide-mediated-sirna-loaded-stable-nucleic-acid-lipid-nanoparticles-on-targeting-therapy-of-hepatic-fibrosis
#3
Zongxiang Jia, Yan Gong, Yufang Pi, Xueying Liu, Lipeng Gao, Liqing Kang, Jing Wang, Fan Yang, Jie Tang, Weiyue Lu, Qinghua Li, Wei Zhang, Zhiqiang Yan, Lei Yu
Hepatic fibrosis is a necessary process in the development of liver diseases such as hepatic cirrhosis and its complications, which has become a serious threat to human health. Currently, antifibrotic drug treatment is ineffective, and one of the reasons should be the lack of liver targeting ability. In this report, polypeptide pPB modified stable nucleic acid lipid nanoparticles (pPB-SNALP) were prepared to selectively deliver siRNAs against heat shock protein 47 (HSP47) to liver for targeted therapy of hepatic fibrosis...
November 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29147013/integrin-alpha-11-in-the-regulation-of-the-myofibroblast-phenotype-implications-for-fibrotic-diseases
#4
Ruchi Bansal, Shigeki Nakagawa, Saleh Yazdani, Joop van Baarlen, Anu Venkatesh, Anna P Koh, Won-Min Song, Nicolas Goossens, Hideo Watanabe, Mary B Beasley, Charles A Powell, Gert Storm, Naftali Kaminski, Harry van Goor, Scott L Friedman, Yujin Hoshida, Jai Prakash
Tissue fibrosis, characterized by excessive accumulation of aberrant extracellular matrix (ECM) produced by myofibroblasts, is a growing cause of mortality worldwide. Understanding the factors that induce myofibroblastic differentiation is paramount to prevent or reverse the fibrogenic process. Integrin-mediated interaction between the ECM and cytoskeleton promotes myofibroblast differentiation. In the present study, we explored the significance of integrin alpha 11 (ITGA11), the integrin alpha subunit that selectively binds to type I collagen during tissue fibrosis in the liver, lungs and kidneys...
November 17, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29141243/trolline-ameliorates-liver-fibrosis-by-inhibiting-the-nf-%C3%AE%C2%BAb-pathway-promoting-hsc-apoptosis-and-suppressing-autophagy
#5
Facheng Bai, Quanfang Huang, Jinlan Nie, Shengjuan Lu, Chunyuan Lu, Xunshuai Zhu, Yuxin Wang, Lang Zhuo, Zhongpeng Lu, Xing Lin
BACKGROUND/AIMS: Previous studies have shown that trolline possesses various forms of pharmacological activity, including antibacterial and antiviral potency. The present paper addressed the putative hepatoprotective effects of trolline. METHODS: Rats received 2 ml/kg CCl4 (mixed 1: 1 in peanut oil) intragastrically twice a week for 8 weeks to induce hepatic fibrosis. The animals were then treated with trolline for additional 4 weeks. Liver pathology and collagen accumulation were observed by hematoxylin-eosin and Masson's trichrome staining, respectively...
November 15, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29140985/notch-signaling-and-progenitor-ductular-reaction-in-steatohepatitis
#6
Carola M Morell, Romina Fiorotto, Marica Meroni, Aileen Raizner, Barbara Torsello, Massimiliano Cadamuro, Gaia Spagnuolo, Eleanna Kaffe, Salvatore Sutti, Emanuele Albano, Mario Strazzabosco
BACKGROUND AND OBJECTIVE: Persistent hepatic progenitor cells (HPC) activation resulting in ductular reaction (DR) is responsible for pathologic liver repair in cholangiopathies. Also, HPC/DR expansion correlates with fibrosis in several chronic liver diseases, including steatohepatitis. Increasing evidence indicates Notch signaling as a key regulator of HPC/DR response in biliary and more in general liver injuries. Therefore, we aimed to investigate the role of Notch during HPC/DR activation in a mouse model of steatohepatitis...
2017: PloS One
https://www.readbyqxmd.com/read/29138513/foxa2-alleviates-ccl4-induced-liver-fibrosis-by-protecting-hepatocytes-in-mice
#7
Wei Wang, Li-Jia Yao, Weifeng Shen, Kai Ding, Pei-Mei Shi, Fei Chen, Jin He, Jin Ding, Xin Zhang, Wei-Fen Xie
The liver-enriched transcription factor Forkhead Box A2 (FOXA2) has been reported to be involved in bile acid homeostasis and bile duct development. However, the role of FOXA2 in liver fibrogenesis remains undefined. In this study, we found that the abundance of FOXA2 was significantly lower in fibrotic livers of patients and mice treated with CCl4 than in controls. Interestingly, the expression level of FOXA2 decreased in hepatocytes, whereas FOXA2 was elevated in hepatic stellate cells (HSCs) of mouse fibrotic livers...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137226/the-neglected-avian-hepatotropic-virus-induces-acute-and-chronic-hepatitis-in-ducks-an-alternative-model-for-hepatology
#8
Xumin Ou, Sai Mao, Jingyu Cao, Yunchao Ma, Guangpeng Ma, Anchun Cheng, Mingshu Wang, Dekang Zhu, Shun Chen, Renyong Jia, Mafeng Liu, Kunfeng Sun, Qiao Yang, Ying Wu, Xiaoyue Chen
Duck Hepatitis A Virus (DHAV) belongs to the Avihepatovirus, which is also classified into Picornaviridae with Hepatovirus, Hepatitis A Virus (HAV). In humans, the pathogenesis of HAV is not well understood because of limited work with animal models. Here, we investigated the progress of duck viral hepatitis caused by DHAV and their potential for dissecting the pathogenesis of HAV. During the course of infection, the duck model had undergone hepatocellular lesions (vacuolation, acidophilic degeneration and steatosis), lymphocytes recruitment (neutrophil granulocytes, heterophilic granulocytes and T cells or plasm cells) and repair (activation of hepatic stellate cells, fibrosis and regeneration)...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29128099/regulation-of-cellular-senescence-by-mir-34a-in-alcoholic-liver-injury
#9
Ying Wan, Kelly McDaniel, Nan Wu, Sugeily Ramos-Lorenzo, Trenton Glaser, Julie Venter, Heather Francis, Lindsey Kennedy, Keisaku Sato, Tianhao Zhou, Konstantina Kyritsi, Qiaobing Huang, Tami Annable, Chaodong Wu, Shannon Glaser, Gianfranco Alpini, Fanyin Meng
Alcoholic liver disease remains a major cause of liver-related morbidity and mortality, which ranges from alcoholic steatohepatitis to fibrosis/cirrhosis and hepatocellular carcinoma, and the related mechanisms are understood poorly. In this study, we aimed to investigate the role of miR-34a in alcohol-induced cellular senescence and liver fibrosis. We found that hepatic miR-34a expression was upregulated in ethanol-fed mice and heavy drinkers with steatohepatitis compared with respective controls. Mice treated with miR-34a Vivo-Morpholino developed less severe liver fibrosis than wild-type mice after 5 weeks of ethanol feeding...
November 2, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29124511/effect-of-shear-stress-on-the-migration-of-hepatic-stellate-cells
#10
Toshihiro Sera, Tateki Sumii, Ryosuke Fujita, Susumu Kudo
When the liver is damaged, hepatic stellate cells (HSCs) can change into an activated, highly migratory state. The migration of HSCs may be affected by shear stress due not only to sinusoidal flow but also by the flow in the space of Disse because this space is filled with blood plasma. In this study, we evaluated the effects of shear stress on HSC migration in a scratch-wound assay with a parallel flow chamber. At regions upstream of the wound area, the migration was inhibited by 0.6 Pa and promoted by 2...
November 9, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/29124251/trail-deletion-prevents-liver-but-not-adipose-tissue-inflammation-during-murine-diet-induced-obesity
#11
Petra Hirsova, Peggy Weng, Warda Salim, Steven F Bronk, Thomas S Griffith, Samar H Ibrahim, Gregory J Gores
Background & Aim: TNF-related apoptosis-inducing ligand (TRAIL) and its cognate receptor(s) are upregulated in human and murine nonalcoholic steatohepatitis (NASH). However, the consequence of this enhanced expression on NASH pathogenesis remains unclear. TRAIL may either accentuate liver injury by promoting hepatic steatosis and inflammation, or it may mitigate the disease process by improving systemic insulin resistance and averting hepatic fibrosis. Herein, we investigated the role of TRAIL in an obesity-induced murine model of NASH...
September 2017: Hepatol Commun
https://www.readbyqxmd.com/read/29120853/ultrastructural-characteristics-of-the-respective-forms-of-hepatic-stellate-cells-in-chronic-hepatitis-b-as-an-example-of-high-fibroblastic-cell-plasticity-the-first-assessment-in-children
#12
Joanna Maria Lotowska, Maria Elzbieta Sobaniec-Lotowska, Dariusz Marek Lebensztejn
PURPOSE: Activation of hepatic stellate cells (HSCs), mainly responsible for extracellular matrix synthesis, is assumed to be central event in the process of liver fibrogenesis. The major objective of the research was to analyze the ultrastructural profile of activated HSCs in children with chronic hepatitis B (chB), with respect to fibrosis intensity. MATERIALS/METHODS: Ultrastructural investigations of HSCs were conducted on liver bioptates from 70 children with clinicopathologically diagnosed chB before antiviral treatment...
November 6, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29118758/combining-v%C3%AE-9v%C3%AE-2-t-cells-with-a-lipophilic-bisphosphonate-efficiently-kills-activated-hepatic-stellate-cells
#13
Xiaoying Zhou, Yanzheng Gu, Hongying Xiao, Ning Kang, Yonghua Xie, Guangbo Zhang, Yan Shi, Xiaoyu Hu, Eric Oldfield, Xueguang Zhang, Yonghui Zhang
Activated hepatic stellate cells (aHSCs) are now established as a central driver of fibrosis in human liver injury. In the presence of chronic or repeated injury, fibrosis, cirrhosis, and hepatocellular carcinoma (HCC) can occur, so there is interest in down-regulating aHSCs activity in order to treat these diseases. Here, we report that Vγ9Vδ2 T cells are reduced in patients with liver cirrhosis, stimulating us to investigate possible interactions between Vγ9Vδ2 T cells and aHSCs. We find that Vγ9Vδ2 T cells kill aHSCs and killing is enhanced when aHSCs are pretreated with BPH-1236, a lipophilic analog of the bone resorption drug zoledronate...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29116096/aqp3-is-regulated-by-ppar%C3%AE-and-jnk-in-hepatic-stellate-cells-carrying-pnpla3-i148m
#14
Matteo Tardelli, Francesca V Bruschi, Thierry Claudel, Veronica Moreno-Viedma, Emina Halilbasic, Fabio Marra, Merima Herac, Thomas M Stulnig, Michael Trauner
Aquaglyceroporins (AQPs) allow the movement of glycerol that is required for triglyceride formation in hepatic stellate cells (HSC), as key cellular source of fibrogenesis in the liver. The genetic polymorphism I148M of the patatin-like phospholipase domain-containing 3 (PNPLA3) is associated with hepatic steatosis and its progression to steatohepatitis (NASH), fibrosis and cancer. We aimed to explore the role of AQP3 for HSC activation and unveil its potential interactions with PNPLA3. HSC were isolated from human liver, experiments were performed in primary HSC and human HSC line LX2...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29114223/the-human-amnion-epithelial-cell-secretome-decreases-hepatic-fibrosis-in-mice-with-chronic-liver-fibrosis
#15
Majid Alhomrani, Jeanne Correia, Marcus Zavou, Bryan Leaw, Nathan Kuk, Rong Xu, Mohamed I Saad, Alexander Hodge, David W Greening, Rebecca Lim, William Sievert
Background: Hepatic stellate cells (HSCs) are the primary collagen-secreting cells in the liver. While HSCs are the major cell type involved in the pathogenesis of liver fibrosis, hepatic macrophages also play an important role in mediating fibrogenesis and fibrosis resolution. Previously, we observed a reduction in HSC activation, proliferation, and collagen synthesis following exposure to human amnion epithelial cells (hAEC) and hAEC-conditioned media (hAEC-CM). This suggested that specific factors secreted by hAEC might be effective in ameliorating liver fibrosis...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29109031/pge2-induces-apoptosis-of-hepatic-stellate-cells-and-attenuates-liver-fibrosis-in-mice-by-downregulating-mir-23a-5p-and-mir-28a-5p
#16
R Brea, O Motiño, D Francés, C García-Monzón, J Vargas, M Fernández-Velasco, L Boscá, M Casado, P Martín-Sanz, N Agra
MicroRNAs (miRNAs), small noncoding RNAs modulating messenger RNA (mRNA) and protein expression, have emerged as key regulatory molecules in chronic liver diseases, whose end stage is hepatic fibrosis, a major global health burden. Pharmacological strategies for prevention or treatment of hepatic fibrosis are still limited, what makes it necessary to establish a better understanding of the molecular mechanisms underlying its pathogenesis. In this context, we have recently shown that cyclooxygenase-2 (COX-2) expression in hepatocytes restricts activation of hepatic stellate cells (HSCs), a pivotal event in the initiation and progression of hepatic fibrosis...
November 3, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29108201/-clinical-features-of-imbalance-between-th1-and-th22-cells-and-its-association-with-disease-progression-in-patients-with-liver-cirrhosis
#17
H Q Wu, J J Zhao, H W Li, Z Zhang
Objective: To investigate the clinical features of imbalance between Th1 and Th22 cells and its association with disease progression in patients with liver cirrhosis, and to explore immune therapeutic strategies for targeted therapy for liver cirrhosis. Methods: In vitro peripheral blood mononucleated cells (PBMCs) were collected by centrifugation. CD3-BV500 and CD8-PerCP-Cy5.5 staining was performed for these cells. IFNγ-PE-Cy7, IL-17a-APC, IL-22-PE, or the corresponding isotype control was added, and then PBMCs were fixed with 1% polyoxymethylene after being washed once by permeabilization-wash buffer...
October 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29108195/-mechanism-of-action-of-glucagon-like-peptide-1-receptor-agonist-in-promoting-the-apoptosis-of-hepatic-stellate-cells-based-on-the-extracellular-signal-regulated-kinase-signaling-pathway
#18
L K Wu, X M He, Y C Liu, Y L Yang, C L Tang, Y M Li, F Wu
No abstract text is available yet for this article.
September 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29107862/gypsophila-elegans-isoorientin-2%C3%A2-o-%C3%AE-l-arabinopyranosyl-ameliorates-porcine-serum-induced-immune-liver-fibrosis-by-inhibiting-nf-%C3%AE%C2%BAb-signaling-pathway-and-suppressing-hsc-activation
#19
Facheng Bai, Quanfang Huang, Jinbin Wei, Shujuan Lv, Yuxin Chen, Chunhong Liang, Ling Wei, Zhongpeng Lu, Xing Lin
The present study was to investigate the inhibitory effect of Gypsophila elegans isoorientin-2″-O-α-l-arabinopyranosyl (GEI) on hepatic stellate cells (HSCs), to reveal the underlying mechanism of GEI against hepatic fibrosis. Our study showed that GEI significantly alleviated liver injury induced by porcine serum (PS) in rats; it notably alleviated collagen accumulation as evidenced by a significant decrease in the levels of collagen biomarkers including hyaluronic acid, laminin, hydroxyproline and procollagen III N-terminal peptide...
November 3, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29106960/carnosol-mediated-sirtuin-1-activation-inhibits-enhancer-of-zeste-homolog-2-to-attenuate-liver-fibrosis
#20
Huanyu Zhao, Zhecheng Wang, Fan Tang, Yan Zhao, Dongcheng Feng, Yang Li, Yan Hu, Chao Wang, Junjun Zhou, Xiaofeng Tian, Jihong Yao
Quiescent hepatic stellate cell (HSC) activation and subsequent conversion into myofibroblasts is the central event in hepatic fibrosis pathogenesis. Epithelial - mesenchymal transition (EMT), another vital participant in liver fibrosis, has the potential to initiate HSC activation, which promotes abundant myofibroblast production. Previous studies suggest that Enhancer of Zeste Homolog 2 (EZH2) plays a significant role in myofibroblast transdifferentiation; however, the underlying mechanisms remain largely unaddressed...
October 26, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
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