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Thiago Almeida Pereira, Wing-Kin Syn, Frederico Figueiredo Amâncio, Pedro Henrique Diniz Cunha, Julia Fonseca Morais Caporali, Guilherme Vaz de Melo Trindade, Elisângela Trindade Santos, Márcia Maria Souza, Zilton Araújo Andrade, Rafal P Witek, William Evan Secor, Fausto Edmundo Lima Pereira, José Roberto Lambertucci, Anna Mae Diehl
BACKGROUND: Symptomatic acute schistosomiasis mansoni is a systemic hypersensitivity reaction against the migrating schistosomula and mature eggs after a primary infection. The mechanisms involved in the pathogenesis of acute schistosomiasis are not fully elucidated. Osteopontin has been implicated in granulomatous reactions and in acute hepatic injury. Our aims were to evaluate if osteopontin plays a role in acute Schistosoma mansoni infection in both human and experimentally infected mice and if circulating OPN levels could be a novel biomarker of this infection...
October 2016: PLoS Neglected Tropical Diseases
Gemma Odena, Jiegen Chen, Juan Jose Lozano, Jose Altamirano, Daniel Rodrigo-Torres, Silvia Affo, Oriol Morales-Ibanez, Hiroshi Matsushita, Jian Zou, Raluca Dumitru, Juan Caballeria, Pere Gines, Vicente Arroyo, Min You, Pierre-Emmanuel Rautou, Dominique Valla, Fulton Crews, Ekihiro Seki, Pau Sancho-Bru, Ramon Bataller
Alcoholic hepatitis (AH) is the most severe form of alcoholic liver disease for which there are no effective therapies. Patients with AH show impaired hepatocyte proliferation, expansion of inefficient ductular cells and high lipopolysaccharide (LPS) levels. It is unknown whether LPS mediates ductular cell expansion. We performed transcriptome studies and identified keratin 23 (KRT23) as a new ductular cell marker. KRT23 expression correlated with mortality and LPS serum levels. LPS-TLR4 pathway role in ductular cell expansion was assessed in human and mouse progenitor cells, liver slices and liver injured TLR4 KO mice...
October 18, 2016: Scientific Reports
Hitomi Hoshino, Makoto Ohta, Makoto Ito, Kenji Uchimura, Yasuhiro Sakai, Takeshi Uehara, Shulin Low, Mana Fukushima, Motohiro Kobayashi
Intrahepatic cholangiocarcinoma (ICC) is the second most common primary liver neoplasm, followed by hepatocellular carcinoma. ICC can be further subclassified as (i) perihilar and (ii) peripheral types, the latter histologically resembling small-sized intrahepatic bile ducts, such as interlobular bile ducts, cholangioles/ductules and the canals of Hering. Cholangiolocellular carcinoma (CoCC), now classified by the World Health Organization as a subtype of combined hepatocellular-cholangiocarcinoma, is currently regarded as a subtype of peripheral-type ICC...
October 17, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
G D L Jorge, R R Tártaro, C A F Escanhoela, I D F S F Boin
BACKGROUND: Biliary complications are important causes of morbidity and mortality in patients undergoing hepatic surgery. The aim of the study was to evaluate late liver alterations after a long period of choledochal clamping in Wistar rats. METHODS: Ten male Wistar rats, weighing 304 grams, anesthetized with sodium thiopental (25 mg/kg) and xylazine (10 mg/kg) intravenously, were distributed into 2 groups: the choledochal clamping group (CCG) and the operation sham group (OSG), with 5 animals each submitted to an abdominal incision...
September 2016: Transplantation Proceedings
Akira Ishihata, Hiroko Maruki-Uchida, Nozomi Gotoh, Sumika Kanno, Yoshitaka Aso, Satoshi Togashi, Masahiko Sai, Tatsuhiko Ito, Yumi Katano
The effects of chronic administration of piceatannol-enriched (9.5% w/w) passion fruit seed extract (PFSE) on the cardiovascular damage induced in a high-fat (HF) diet-fed model of Fischer 344 rats were evaluated. Rats were fed the control, HF, or HF diets containing PFSE (0.5% w/w) for 16 weeks, and the effects of the various diets on the tissue weight, serum lipid profile, hepatic fibrosis, hepatic ductular reaction, cardiac function and aortic ring reactivity were examined. HF diet-fed rats developed signs of cardiovascular disease with abnormal serum profiles compared to control diet-fed rats...
September 14, 2016: Food & Function
Raul S Gonzalez, Michael A Gilger, Won Jae Huh, Kay Washington
Context .- Cardiac hepatopathy and Budd-Chiari syndrome are 2 forms of hepatic venous outflow obstruction with different pathophysiology but overlapping histologic findings, including sinusoidal dilation and centrilobular necrosis. Objective .- To determine whether a constellation of morphologic findings could help distinguish between the 2 and could suggest the diagnoses in previously undiagnosed patients. Design .- We identified 26 specimens with a diagnosis of cardiac hepatopathy and 23 with a diagnosis of Budd-Chiari syndrome...
September 28, 2016: Archives of Pathology & Laboratory Medicine
Mariko Kumagawa, Naoki Matsumoto, Yukinobu Watanabe, Midori Hirayama, Takao Miura, Hiroshi Nakagawara, Masahiro Ogawa, Shunichi Matsuoka, Mitsuhiko Moriyama, Tadatoshi Takayama, Masahiko Sugitani
Hepatocellular adenoma (HCA) was recently classified into four pathological subtypes. There have been few studies describing the findings of contrast-enhanced ultrasonography (CEUS) of each type. Our case concerns a 78-year-old man who had undergone routine medical check-ups for hepatitis C for 11 years. Abdominal ultrasonography showed a 28 mm, hypo-echoic mass in the segment 4 of the liver. His integrating amount of drinking was 670 kg convert into ethanol. CEUS with Sonazoid demonstrated mild uniform hypo-enhancement with inflow of microbubbles from the periphery of the tumor in the arterial phase, and heterogeneously hypo-enhancement in the post vascular phase...
September 18, 2016: World Journal of Hepatology
V Šmíd, T Petr, K Váňová, J Jašprová, J Šuk, L Vítek, F Šmíd, L Muchová
Bile acids have been implicated in cholestatic liver damage, primarily due to their detergent effect on membranes and induction of oxidative stress. Gangliosides can counteract these harmful effects by increasing the rigidity of the cytoplasmic membrane. Induction of haem oxygenase (HMOX) has been shown to protect the liver from increased oxidative stress. The aim of this study was to determine the changes in the synthesis and distribution of liver gangliosides following bile duct ligation (BDL), and to assess the effects of HMOX both on cholestatic liver injury and ganglioside metabolism...
2016: Folia Biologica (Praha)
Jan Best, Stefaan Verhulst, Wing-Kin Syn, Kimberly Lagaisse, Noemi van Hul, Femke Heindryckx, Jan-Peter Sowa, Liesbeth Peeters, Hans Van Vlierberghe, Isabelle A Leclercq, Ali Canbay, Laurent Dollé, Leo A van Grunsven
Chronic cholangiopathies, such as primary and secondary sclerosing cholangitis, are progressive disease entities, associated with periportal accumulation of inflammatory cells, encompassing monocytes and macrophages, peribiliary extracellular matrix (ECM) deposition and ductular reaction (DR). This study aimed to elucidate the relevance of macrophages in the progression of chronic cholangiopathies through macrophage depletion in a 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) mouse model. One group of mice received a single i...
2016: PloS One
Yuji Suzuki, Hirokatsu Katagiri, Ting Wang, Keisuke Kakisaka, Kohei Kume, Satoshi S Nishizuka, Yasuhiro Takikawa
Partial hepatectomy models in mice have been widely used for liver regeneration studies. A typical procedure removes ~2/3 of the liver by lobular ligation without tissue dissection. However, hepatectomy in humans involves physical damage (ie, physical partial hepatectomy, PPHx). Therefore, the liver regeneration process after PPHx should involve reactions to acute local injury followed by systematic remodeling. To clarify the liver regeneration process after PPHx, we used a murine liver injury model that mimics the actual human surgical procedure...
September 12, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
Andrea Janz Moreira, Graziella Ramos Rodrigues, Silvia Bona, Leila Xavier Sinigaglia Fratta, Giovana Regina Weber, Jaqueline Nascimento Picada, Jorge Luiz Dos Santos, Carlos Thadeu Cerski, Claudio Augusto Marroni, Norma Possa Marroni
Hepatocellular carcinoma (HCC) is the most common primary malignancy of the liver and is characterized by multistage formation. The presence of ductular reaction, cytokeratin 7 positivity (PCK7), and increased levels of gamma glutamyltransferase (γGT) has been observed during liver carcinogenesis and contribute to tumor progression. Our goal was to evaluate the ductular reaction in multistage carcinogenesis and to correlate PCK7 and γGT levels with tumor incidence, histological characteristics, liver DNA damage index, and the expression of oxidative stress proteins...
August 15, 2016: Protoplasma
Wilhelmus J Kwanten, Yves-Paul Vandewynckel, Wim Martinet, Benedicte Y De Winter, Peter P Michielsen, Viviane O Van Hoof, Ann Driessen, Jean-Pierre Timmermans, Pierre Bedossa, Hans Van Vlierberghe, Sven M Francque
Autophagy and the unfolded protein response (UPR) are key cellular homeostatic mechanisms and are both involved in liver diseases, including nonalcoholic fatty liver disease (NAFLD). Although increasing but conflicting results link these mechanisms to lipid metabolism, their role and potential cross talk herein have been poorly investigated. Therefore, we assessed the effects of hepatocyte-specific autophagy deficiency on liver parenchyma, the UPR, and lipid metabolism. Adult hepatocellular-specific autophagy-deficient mice (Atg7(F/F)Alb-Cre(+)) were compared with their autophagy-competent littermates (Atg7(+/+)Alb-Cre(+))...
October 1, 2016: American Journal of Physiology. Gastrointestinal and Liver Physiology
Nicola di Meo, Giuseppe Stinco, Alessandro Gatti, Mattia Fadel, Silvia Vichi, Giusto Trevisan
Dear Editor, Apocrine hidradenoma is a rare benign adnexal tumor related to the more common poroma, as they both originate from sweat glands. Hidradenoma usually has an eccrine differentiation, but an apocrine differentiation is possible. Due to its rarity and non-specific clinical appearance it is difficult to differentiate it from other malignant cutaneous lesions. In this challenging task, dermatoscopy could be particularly helpful to better describe, recognize, and differentiate these lesions. Unfortunately, the literature offers only few dermatoscopic descriptions of this rare cutaneous neoplasm...
June 2016: Acta Dermatovenerologica Croatica: ADC
Frederick A Jakobiec, Anna M Stagner, Nahyoung Grace Lee
A 24-year-old man with a painful, recurrent left upper eyelid nodule underwent an excision. Histopathologic evaluation disclosed a granulomatous process, most likely in response to a ruptured epidermoid cyst. In the vicinity of the nodule were multiple eccrine sweat glands displaying a curious clear-cell appearance in the adlumenal cells, the first example of such a phenomenon in the eyelids. Alcian blue, periodic acid Schiff, and documented staining failed to disclose, respectively, any cytoplasmic mucosubstances, glycogen accumulation, or lipid in the adlumenal secretory cells...
July 21, 2016: Ophthalmic Plastic and Reconstructive Surgery
Richard L Gieseck, Thirumalai R Ramalingam, Kevin M Hart, Kevin M Vannella, David A Cantu, Wei-Yu Lu, Sofía Ferreira-González, Stuart J Forbes, Ludovic Vallier, Thomas A Wynn
Fibroproliferative diseases are driven by dysregulated tissue repair responses and are a major cause of morbidity and mortality because they affect nearly every organ system. Type 2 cytokine responses are critically involved in tissue repair; however, the mechanisms that regulate beneficial regeneration versus pathological fibrosis are not well understood. Here, we have shown that the type 2 effector cytokine interleukin-13 simultaneously, yet independently, directed hepatic fibrosis and the compensatory proliferation of hepatocytes and biliary cells in progressive models of liver disease induced by interleukin-13 overexpression or after infection with Schistosoma mansoni...
July 19, 2016: Immunity
Guido Carpino, Valerio Nobili, Anastasia Renzi, Cristiano De Stefanis, Laura Stronati, Antonio Franchitto, Anna Alisi, Paolo Onori, Rita De Vito, Gianfranco Alpini, Eugenio Gaudio
Non-alcoholic fatty liver disease is one of the most important causes of liver-related morbidity in children. In non-alcoholic fatty liver disease, the activation of liver resident macrophage pool is a central event in the progression of liver injury. The aims of the present study were to evaluate the polarization of liver macrophages and the possible role of Wnt3a production by macrophages in hepatic progenitor cell response in the progression of pediatric non-alcoholic fatty liver disease. 32 children with biopsy-proven non-alcoholic fatty liver disease were included...
2016: PloS One
Jianxing Zeng, Yingying Jing, Rongyu Shi, Xiaorong Pan, Fobao Lai, Wenting Liu, Rong Li, Lu Gao, Xiaojuan Hou, Mengchao Wu, Lixin Wei
Autophagy plays important roles in self-renewal and differentiation of stem cells. Hepatic progenitor cells (HPCs) are thought to have the ability of self-renewal as well as possess a bipotential capacity, which allows them to differentiate into both hepatocytes and bile ductular cells. However, how autophagy contributes to self-renewal and differentiation of hepatic progenitor cells is not well understood. In this study, we use a well-established rat hepatic progenitor cell lines called WB-F344, which is treated with 3...
June 17, 2016: Cell Cycle
Delia Blaya, Mar Coll, Daniel Rodrigo-Torres, Maria Vila-Casadesús, José Altamirano, Marta Llopis, Isabel Graupera, Luis Perea, Beatriz Aguilar-Bravo, Alba Díaz, Jesus M Banales, Joan Clària, Juan José Lozano, Ramon Bataller, Juan Caballería, Pere Ginès, Pau Sancho-Bru
OBJECTIVE: MicroRNAs (miRNAs) are well-known regulators of disease pathogenesis and have great potential as biomarkers and therapeutic targets. We aimed at profiling miRNAs in alcoholic hepatitis (AH) and identifying miRNAs potentially involved in liver injury. DESIGN: MiRNA profiling was performed in liver samples from patients with AH, alcohol liver disease, non-alcoholic steatohepatitis, HCV disease and normal liver tissue. Expression of miRNAs was assessed in liver and serum from patients with AH and animal models...
September 2016: Gut
Julia Köhn-Gaone, Benjamin J Dwyer, Candice A Grzelak, Gregory Miller, Nicholas A Shackel, Grant A Ramm, Geoffrey W McCaughan, Caryn L Elsegood, John K Olynyk, Janina E E Tirnitz-Parker
Complications of end-stage chronic liver disease signify a major cause of mortality worldwide. Irrespective of the underlying cause, most chronic liver diseases are characterized by hepatocellular necrosis, inflammation, fibrosis, and proliferation of liver progenitor cells or ductular reactions. Vast differences exist between experimental models that mimic these processes, and their identification is fundamental for translational research. We compared two common murine models of chronic liver disease: the choline-deficient, ethionine-supplemented (CDE) diet versus thioacetamide (TAA) supplementation...
July 2016: American Journal of Pathology
Mehmet Akif Türkoğlu, Yusuke Yamamoto, Teiichi Sugiura, Yukiyasu Okamura, Takaaki Ito, Ryo Ashida, Sunao Uemura, Takashi Miyata, Yuko Kakuda, Yasuni Nakanuma, Katsuhiko Uesaka
BACKGROUND: The aim of this study was to clarify the clinicopathologic characteristics of hypervascular intrahepatic cholangiocarcinoma (ICC). METHODS: Seventy patients with a mass-forming type ICC underwent hepatectomy between 2003 and 2013. These patients were divided into 2 groups and compared based on findings during the late arterial phase of computed tomography: hypervascular ICC (the mean computed tomography value of the tumor ≥ that of the nontumorous liver parenchyma, n = 21), and hypovascular ICC (n = 49)...
September 2016: Surgery
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