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https://www.readbyqxmd.com/read/28637102/-the-progression-of-liver-fibrosis-in-non-alcoholic-fatty-liver-disease
#1
REVIEW
Moon Young Kim
Understanding the pathogenesis of non-alcoholic steatohepatitis (NASH) and its fibrosis progression is still evolving. Nonetheless, current evidence suggests that mechanisms involved are very complex parallel processes with multiple metabolic factors. Lipotoxicity related with excess saturated free fatty acids, obesity, and insulin resistance acts as the central driver of cellular injury via oxidative stress. Hepatocyte apoptosis and/or senescence are also contribute to the activation of inflammasome via various intra- and inter-cellular signaling mechanisms that lead to fibrosis...
June 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28630143/extracellular-vesicles-of-stromal-origin-target-and-support-hematopoietic-stem-and-progenitor-cells
#2
Gregoire Stik, Simon Crequit, Laurence Petit, Jennifer Durant, Pierre Charbord, Thierry Jaffredo, Charles Durand
Extracellular vesicles (EVs) have been recently reported as crucial mediators in cell-to-cell communication in development and disease. In this study, we investigate whether mesenchymal stromal cells that constitute a supportive microenvironment for hematopoietic stem and progenitor cells (HSPCs) released EVs that could affect the gene expression and function of HSPCs. By taking advantage of two fetal liver-derived stromal lines with widely differing abilities to maintain HSPCs ex vivo, we demonstrate that stromal EVs play a critical role in the regulation of HSPCs...
June 19, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28629077/effects-of-the-surface-modification-of-polyurethane-substrates-on-genotoxicity-and-blood-activation-processes
#3
Roman Major, Hanna Plutecka, Anna Gruszczynska, Juergen M Lackner, Boguslaw Major
The aim of this study was to determine the mutagenic and thrombogenic potential of a material composed of a thin coating deposited on a polymeric substrate. In this work, a surface was modified in a manner that would mimic the function of cellular niches. Finally, the surfaces should actively capture and differentiate progenitor cells from the blood stream. Thin films with 10 to 500nm thicknesses were deposited by unbalanced, pulsed DC magnetron sputtering on smooth polyurethane. Such high energy conditions led to a stiffening of the polymer surface layers by pseudodiffusion during the initial stages of film growth...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28625011/liver-epithelioid-progenitor-cells-derived-from-fetal-luxi-bovine-alleviate-liver-fibrosis
#4
Kunfu Wang, Hao Liu, Jinjuan Yang, Caiyun Ma, Zebiao Zhang, Dong Zheng, Weijun Guan
Liver epithelioid progenitor cells (LEPCs) have important roles in liver therapy because of their hepatic differentiation potency in vitro and in vivo. Despite many researches on humans, mice, and rats, equivalent progenitor cells derived from bovine are relatively rare. The purpose of our current study is to characterize bovine LEPCs, and research on the cure potency of this heteroplastic progenitor cells on mice liver fibrosis. We have used collagenase IV digesting and differential adhesion method to isolate slabstone shape, EpCAM, LGR5, NCAM1 and SOX9 positive progenitor cells from fetal Luxi bovine liver...
June 17, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28624207/identification-of-novel-fibrosis-modifiers-by-in%C3%A2-vivo-sirna-silencing
#5
Elisabeth H Vollmann, Lizhi Cao, Aldo Amatucci, Taylor Reynolds, Stefan Hamann, Isin Dalkilic-Liddle, Thomas O Cameron, Markus Hossbach, Kevin J Kauffman, Faryal F Mir, Daniel G Anderson, Tatiana Novobrantseva, Victor Koteliansky, Tatiana Kisseleva, David Brenner, Jeremy Duffield, Linda C Burkly
Fibrotic diseases contribute to 45% of deaths in the industrialized world, and therefore a better understanding of the pathophysiological mechanisms underlying tissue fibrosis is sorely needed. We aimed to identify novel modifiers of tissue fibrosis expressed by myofibroblasts and their progenitors in their disease microenvironment through RNA silencing in vivo. We leveraged novel biology, targeting genes upregulated during liver and kidney fibrosis in this cell lineage, and employed small interfering RNA (siRNA)-formulated lipid nanoparticles technology to silence these genes in carbon-tetrachloride-induced liver fibrosis in mice...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28620747/amniotic-fluid-cells-current-progress-and-emerging-challenges-in-renal-regeneration
#6
REVIEW
Stefano Da Sacco, Laura Perin, Sargis Sedrakyan
Amniotic fluid (AF) contains a heterogeneous population of cells that have been identified to possess pluripotent and progenitor-like characteristics. These cells have been applied in various regenerative medicine applications ranging from in vitro cell differentiation to tissue engineering to cellular therapies for different organs including the heart, the liver, the lung, and the kidneys. In this review, we examine the different methodologies used for the derivation of amniotic fluid stem cells and renal progenitors, and their application in renal repair and regeneration...
June 15, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28616151/therapeutic-potential-of-dental-stem-cells
#7
REVIEW
Elna Paul Chalisserry, Seung Yun Nam, Sang Hyug Park, Sukumaran Anil
Stem cell biology has become an important field in regenerative medicine and tissue engineering therapy since the discovery and characterization of mesenchymal stem cells. Stem cell populations have also been isolated from human dental tissues, including dental pulp stem cells, stem cells from human exfoliated deciduous teeth, stem cells from apical papilla, dental follicle progenitor cells, and periodontal ligament stem cells. Dental stem cells are relatively easily obtainable and exhibit high plasticity and multipotential capabilities...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/28610623/transplantation-of-human-bone-marrow-mesenchymal-stromal-cells-reduces-liver-fibrosis-more-effectively-than-wharton-s-jelly%C3%A2-mesenchymal-stromal-cells
#8
Mathiyazhagan Rengasamy, Gurbind Singh, Noor Atiqah Fakharuzi, Siddikuzzaman, Sudha Balasubramanian, Priyanka Swamynathan, Charan Thej, Gopinath Sasidharan, Pawan Kumar Gupta, Anjan Kumar Das, Ahmad Zuhairi Abd Rahman, Kamal Shaik Fakiruddin, Lim Moon Nian, Zubaidah Zakaria, Anish S Majumdar
BACKGROUND: Mesenchymal stromal cells (MSCs) from various tissues have shown moderate therapeutic efficacy in reversing liver fibrosis in preclinical models. Here, we compared the relative therapeutic potential of pooled, adult human bone marrow (BM)- and neonatal Wharton's jelly (WJ)-derived MSCs to treat CCl4-induced liver fibrosis in rats. METHODS: Sprague-Dawley rats were injected with CCl4 for 8 weeks to induce irreversible liver fibrosis. Ex-vivo expanded, pooled human MSCs obtained from BM and WJ were intravenously administered into rats with liver fibrosis at a dose of 10 × 10(6) cells/animal...
June 13, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28599598/uniform-neural-tissue-models-produced-on-synthetic-hydrogels-using-standard-culture-techniques
#9
Christopher Barry, Matthew T Schmitz, Nicholas E Propson, Zhonggang Hou, Jue Zhang, Bao K Nguyen, Jennifer M Bolin, Peng Jiang, Brian E McIntosh, Mitchell D Probasco, Scott Swanson, Ron Stewart, James A Thomson, Michael P Schwartz, William L Murphy
The aim of the present study was to test sample reproducibility for model neural tissues formed on synthetic hydrogels. Human embryonic stem (ES) cell-derived precursor cells were cultured on synthetic poly(ethylene glycol) (PEG) hydrogels to promote differentiation and self-organization into model neural tissue constructs. Neural progenitor, vascular, and microglial precursor cells were combined on PEG hydrogels to mimic developmental timing, which produced multicomponent neural constructs with 3D neuronal and glial organization, organized vascular networks, and microglia with ramified morphologies...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28599080/bmp-signaling-governs-biliary-driven-liver-regeneration-in-zebrafish-via-tbx2b-and-id2a
#10
Tae-Young Choi, Mehwish Khaliq, Shinya Tsurusaki, Nikolay Ninov, Didier Y R Stainier, Minoru Tanaka, Donghun Shin
Upon mild liver injury, new hepatocytes originate from pre-existing hepatocytes. However, if hepatocyte proliferation is impaired, a manifestation of severe liver injury, biliary epithelial cells (BECs) contribute to new hepatocytes through BEC dedifferentiation into liver progenitor cells (LPCs), also termed oval cells or hepatoblast-like cells (HB-LCs), and subsequent differentiation into hepatocytes. Despite the identification of several factors regulating BEC dedifferentiation and activation, little is known about factors involved in the regulation of LPC differentiation into hepatocytes during liver regeneration...
June 9, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28591987/-notch-signaling-pathway-participates-in-the-differentiation-of-hepatic-progenitor-cells-into-bile-duct-epithelial-cells-and-progression-of-hepatic-fibrosis-in-cholestatic-liver-fibrosis-rat
#11
Y P Mu, X Zhang, Y Xu, W W Fan, X W Li, J M Chen, G F Chen, P Liu
Objective: To investigate differentiation direction of hepatic progenitor cells (HPCs) in cholestatic liver fibrosis (CLF), and the role of Notch signaling pathway in the differentiation of HPCs. Methods: A CLF rat model was established by bile duct ligation (BDL) followed by monitoring changes of Notch signal pathway and the cellular origin of proliferating cholangiocytes. After intraperitoneal injection of DAPT (a Notch signaling inhibitor) after bile duct ligation, the progress of liver fibrosis and the proliferation of cholangiocytes after inhibition of the Notch pathway were analyzed...
June 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28589491/synthesis-and-characterization-of-novel-bmi1-inhibitors-targeting-cellular-self-renewal-in-hepatocellular-carcinoma
#12
Monica Bartucci, Mohamed S Hussein, Eric Huselid, Kathleen Flaherty, Michele Patrizii, Saurabh V Laddha, Cindy Kui, Rachel A Bigos, John A Gilleran, Mervat M S El Ansary, Mona A M Awad, S David Kimball, David J Augeri, Hatem E Sabaawy
BACKGROUND: Hepatocellular carcinoma (HCC) represents one of the most lethal cancers worldwide due to therapy resistance and disease recurrence. Tumor relapse following treatment could be driven by the persistence of liver cancer stem-like cells (CSCs). The protein BMI1 is a member of the polycomb epigenetic factors governing cellular self-renewal, proliferation, and stemness maintenance. BMI1 expression also correlates with poor patient survival in various cancer types. OBJECTIVE: We aimed to elucidate the extent to which BMI1 can be used as a potential therapeutic target for CSC eradication in HCC...
June 6, 2017: Targeted Oncology
https://www.readbyqxmd.com/read/28586545/multifaceted-therapeutic-benefits-of-factors-derived-from-stem-cells-from-human-exfoliated-deciduous-teeth-for-acute-liver-failure-in-rats
#13
Yoshihiro Matsushita, Masatoshi Ishigami, Kohki Matsubara, Megumi Kondo, Hirotaka Wakayama, Hidemi Goto, Minoru Ueda, Akihito Yamamoto
In acute liver failure (ALF), a poorly controlled innate immune response causes massive hepatic destruction, which elicits a systemic inflammatory response, progressive multiple organ failure and ultimate sudden death. Although the liver has inherent tissue-repairing activities, its regeneration during ALF fails, and orthotopic liver transplantation is the only curative approach. Here we show that a single intravenous administration of stem cells derived from human exfoliated deciduous teeth (SHEDs) or of SHED-derived serum-free conditioned medium (SHED-CM) into the d-galactosamine-induced rat model of ALF markedly improved the condition of the injured liver and the animals' survival rate...
June 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28586009/fli-1-overexpression-in-erythroleukemic-cells-promotes-erythroid-de-differentiation-while-spi-1-pu-1-exerts-the-opposite-effect
#14
Laura M Vecchiarelli-Federico, Tangjingjun Liu, Yao Yao, Yuanyuan Gao, Yanmei Li, You-Jun Li, Yaacov Ben-David
The ETS transcription factors play a critical role during hematopoiesis. In F-MuLV-induced erythroleukemia, Fli‑1 insertional activation producing high expression of this transcription factor required to promote proliferation. How deregulated Fli‑1 expression alters the balance between erythroid differentiation and proliferation is unknown. To address this issue, we exogenously overexpressed Fli‑1 in an erythroleukemic cell harboring activation of spi‑1/PU.1, another ETS gene involved in erythroleukemogenesis...
June 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28583205/human-liver-mesenchymal-stem-progenitor-cells-inhibit-hepatic-stellate-cell-activation-in-vitro-and-in-vivo-evaluation
#15
Mustapha Najimi, Silvia Berardis, Hoda El-Kehdy, Valérie Rosseels, Jonathan Evraerts, Catherine Lombard, Adil El Taghdouini, Patrick Henriet, Leo van Grunsven, Etienne Marc Sokal
BACKGROUND: Progressive liver fibrosis leads to cirrhosis and end-stage liver disease. This disease is a consequence of strong interactions between matrix-producing hepatic stellate cells (HSCs) and resident and infiltrating immune cell populations. Accumulated experimental evidence supports the involvement of adult-derived human liver mesenchymal stem/progenitor cells (ADHLSCs) in liver regeneration. The aim of the present study was to evaluate the influence of ADHLSCs on HSCs, both in vitro and in vivo...
June 5, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28580850/-advances-in-the-pathogenesis-of-non-alcoholic-fatty-liver-disease
#16
Alajos Pár, Gabriella Pár
Non alcoholic fatty liver disease is the hepatic manifestation of metabolic syndrome, and the most common liver disease. Its more aggressive form is the non alcoholic steatohepatitis. Multiple genetic and environmental factors lead to the accumulation of triglicerides and the inflammatory cascade. High fat diet, obesity, adipocyte dysfunction with cytokine production, insulin resistance and increased lipolysis with free fatty acid flux into the liver - all are the drivers of liver cell injury. Activation of inflammasome by damage- or pathogen-associated molecular patterns results in "steril inflammation" and immune response, while the hepatic stellate cells and progenitor cells lead to fibrogenesis...
June 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28574111/isolation-characterization-and-cold-storage-of-cells-isolated-from-diseased-explanted-livers
#17
Elisa Belaschk, Susanne Rohn, Ramla Mukiibi, Anja Reutzel-Selke, Peter Tang, Birgit Sawitzki, Johann Pratschke, Igor M Sauer, Martina T Mogl
INTRODUCTION: Livers discarded after standard organ retrieval are commonly used as a cell source for hepatocyte transplantation. Due to the scarcity of organ donors, this leads to a shortage of suitable cells for transplantation. Here, the isolation of liver cells from diseased livers removed during liver transplantation is studied and compared to the isolation of cells from liver specimens obtained during partial liver resection. METHODS: Hepatocytes from 20 diseased explanted livers (Ex-group) were isolated, cultured and stored at 4°C for up to 48 hours, and compared to hepatocytes isolated from the normal liver tissue of 14 liver lobe resections (Rx-group)...
May 23, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28566744/mri-tracking-of-autologous-pancreatic-progenitor-derived-insulin-producing-cells-in-monkeys
#18
Chunlin Zou, Yi Lu, Xiahong Teng, Shuyan Wang, Xiaoting Sun, Fen Huang, Guannan Shu, Xin Huang, Hongwei Guo, Zhiguo Chen, Jian Zhang, Yu Alex Zhang
Insulin-producing cells (IPCs) derived from a patient's own stem cells offer great potential for autologous transplantation in diabetic patients. However, the limited survival of engrafted cells remains a bottleneck in the application of this strategy. The present study aimed to investigate whether nanoparticle-based magnetic resonance (MR) tracking can be used to detect the loss of grafted stem cell-derived IPCs in a sensitive and timely manner in a diabetic monkey model. Pancreatic progenitor cells (PPCs) were isolated from diabetic monkeys and labeled with superparamagnetic iron oxide nanoparticles (SPIONs)...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28562206/lipopolysaccharide-induces-the-differentiation-of-hepatic-progenitor-cells-into-myofibroblasts-via-activation-of-the-hedgehog-signalling-pathway
#19
Xiao-Rong Pan, Ying-Ying Jing, Wen-Ting Liu, Zhi-Peng Han, Rong Li, Yang Yang, Jing-Ni Zhu, Xiao-Yong Li, Pei-Pei Li, Li-Xin Wei
Normally, hepatic progenitor cells (HPCs) are activated and differentiate into hepatocytes or bile ductular cells to repair liver damage during liver injury. However, it remains controversial whether the abnormal differentiation of HPCs occurs under abnormal conditions. Lipopolysaccharide (LPS), a component of the microenvironment, promotes liver fibrosis. In the present study, HPCs promoted liver fibrosis in rats following carbon tetrachloride (CCl4) treatment. Meanwhile, the LPS level in the portal vein was elevated and played a primary role in the fate of HPCs...
May 31, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28548028/developmental-differences-between-newborn-and-adult-mice-in-response-to-romiplostim
#20
Katherine A Sparger, Haley Ramsey, Viola Lorenz, Zhi-Jian Liu, Henry A Feldman, Nan Li, Tahirih Laforest, Martha C Sola-Visner
Thrombocytopenia is frequent among sick neonates. While most cases are transient, some neonates experience prolonged and severe thrombocytopenia. These infants often pose diagnostic and therapeutic challenges, and may receive large numbers of platelet transfusions. Romiplostim (ROM) is a thrombopoietin (TPO)-receptor-agonist approved for treatment of adults with chronic immune thrombocytopenia (ITP). The immature platelet fraction (IPF) is a novel measure of newly produced platelets, which could aid with the diagnostic evaluation of thrombocytopenic neonates...
May 26, 2017: Platelets
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