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https://www.readbyqxmd.com/read/29205342/phylogenetic-analyses-of-the-hepatic-architecture-in-vertebrates
#1
Nobuyoshi Shiojiri, Harunobu Kametani, Noriaki Ota, Yusuke Akai, Tomokazu Fukuchi, Tomoka Abo, Sho Tanaka, Junri Sekiguchi, Sachie Matsubara, Hayato Kawakami
The mammalian liver has a structural and functional unit called the liver lobule, in the periphery of which the portal triad consisting of the portal vein, bile duct and hepatic artery is developed. This type of hepatic architecture is detectable in many other vertebrates, including amphibians and birds, whereas intrahepatic bile ducts run independently of portal vein distribution in actinopterygians such as the salmon and tilapia. It remains to be clarified how the hepatic architectures are phylogenetically developed among vertebrates...
December 4, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29143121/telomere-length-of-gallbladder-epithelium-is-shortened-in-patients-with-congenital-biliary-dilatation-measurement-by-quantitative-fluorescence-in-situ-hybridization
#2
Yuto Aoki, Junko Aida, Youichi Kawano, Ken-Ichi Nakamura, Naotaka Izumiyama-Shimomura, Naoshi Ishikawa, Tomio Arai, Yoshiharu Nakamura, Nobuhiko Taniai, Eiji Uchida, Kaiyo Takubo, Toshiyuki Ishiwata
BACKGROUND: Congenital biliary dilatation (CBD) is a congenital malformation involving both dilatation of the extrahepatic bile duct and pancreaticobiliary maljunction. Persistent reflux of pancreatic juice injures the biliary tract mucosa, resulting in chronic inflammation and higher rates of carcinogenesis in the biliary tract, including the gallbladder. Telomeres are repetitive DNA sequences located at the ends of chromosomes. Chromosomal instability due to telomere dysfunction plays an important role in the carcinogenesis of many organs...
November 15, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/29134411/distinct-roles-of-ecto-nucleoside-triphosphate-diphosphohydrolase-2-ntpdase2-in-liver-regeneration-and-fibrosis
#3
Linda Feldbrügge, Z Gordon Jiang, Eva Csizmadia, Shuji Mitsuhashi, Stephanie Tran, Eric U Yee, Sonja Rothweiler, Kahini A Vaid, Jean Sévigny, Moritz Schmelzle, Yury V Popov, Simon C Robson
Ecto-nucleoside triphosphate diphosphohydrolases (E-NTPDases) are cell surface-located transmembrane ecto-enzymes of the CD39 superfamily which regulate inflammation and tissue repair by catalyzing the phosphohydrolysis of extracellular nucleotides and modulating purinergic signaling. In the liver, NTPDase2 is reportedly expressed on portal fibroblasts, but its functional role in regulating tissue regeneration and fibrosis is incompletely understood. Here, we studied the role of NTPDase2 in several models of liver injury using global knockout mice...
November 13, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/29127325/acinar-injury-and-early-cytokine-response-in-human-acute-biliary-pancreatitis
#4
Aparna Jakkampudi, Ramaiah Jangala, Ratnakar Reddy, Sasikala Mitnala, G Venkat Rao, Rebala Pradeep, D Nageshwar Reddy, Rupjyoti Talukdar
Clinical acute pancreatitis (AP) is marked by an early phase of systemic inflammatory response syndrome (SIRS) with multiorgan dysfunction (MODS), and a late phase characterized by sepsis with MODS. However, the mechanisms of acinar injury in human AP and the associated systemic inflammation are not clearly understood. This study, for the first time, evaluated the early interactions of bile acid induced human pancreatic acinar injury and the resulting cytokine response. We exposed freshly procured resected human pancreata to taurolithocolic acid (TLCS) and evaluated for acinar injury, cytokine release and interaction with peripheral blood mononuclear cells (PBMCs)...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29052835/role-of-percutaneous-transhepatic-biliary-drainage-in-the-management-of-blunt-liver-trauma-a-case-report
#5
Şükrü Oğuz, Reyyan Yıldırım, Serdar Topaloğlu
The liver is the most commonly injured intra-abdominal organ after blunt trauma. The management of massive liver injury is complex. Percutaneous transhepatic biliary drainage is the first approach considered, particularly for proximal bile duct strictures after liver surgery. A 27-year-old female patient was transferred to our emergency department with grade V blunt injury. Regarding the patient's unresponsive hemodynamic instability, right hepatectomy was performed. The patient presented with benign biliary duct stricture after surgery that were treated via the percutaneous approach...
September 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28716705/pathobiology-of-biliary-epithelia
#6
REVIEW
Angela C Cheung, Maria J Lorenzo Pisarello, Nicholas F LaRusso
Cholangiocytes are epithelial cells that line the intra- and extrahepatic biliary tree. They serve predominantly to mediate the content of luminal biliary fluid, which is controlled via numerous signaling pathways influenced by endogenous (e.g., bile acids, nucleotides, hormones, neurotransmitters) and exogenous (e.g., microbes/microbial products, drugs etc.) molecules. When injured, cholangiocytes undergo apoptosis/lysis, repair and proliferation. They also become senescent, a form of cell cycle arrest, which may prevent propagation of injury and/or malignant transformation...
July 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28706986/liver-preservation-by-aortic-perfusion-alone-compared-with-preservation-by-aortic-perfusion-and-additional-arterial-ex-situ-back-table-perfusion-with-histidine-tryptophan-ketoglutarate-solution-a-prospective-randomized-controlled-multicenter-study
#7
Gerd Otto, Michael Heise, Jochen Thies, Michael Pitton, Jens Schneider, Gernot Kaiser, Peter Neuhaus, Otto Kollmar, Michael Barthels, Josef Geks, Wolf Otto Bechstein, Achim Hellinger, Jürgen Klempnauer, Winfried Padberg, Nils Frühauf, Andre Ebbing, Dietmar Mauer, Astrid Schneider, Robert Kwiecien, Kai Kronfeld
BACKGROUND: Arterial ex situ back-table perfusion (BP) reportedly reduces ischemic-type biliary lesion after liver transplantation. We aimed to verify these findings in a prospective investigation. METHODS: Our prospective, randomized, controlled, multicenter study involved livers retrieved from patients in 2 German regions, and compared the outcomes of standard aortic perfusion to those of aortic perfusion combined with arterial ex situ BP. The primary endpoint was the incidence of ischemic-type biliary lesions over a follow-up of 2 years after liver transplantation, whereas secondary endpoints included 2-year graft survival, initial graft damage as reflected by transaminase levels, and functional biliary parameters at 6 months after transplantation...
July 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28702164/a-case-of-an-anomalous-biliary-tract-diagnosed-preoperatively
#8
Jun Kataoka, Toshikatsu Nitta, Yoshihiro Inoue, Masato Ota, Tomo Tominaga, Kensuke Fujii, Hiroshi Kawasaki, Takashi Ishibashi
We describe a 48-year-old man with cholecystolithiasis whose preoperative magnetic resonance cholangiopancreatography (MRCP) scan showed that the right accessory hepatic duct branching from the cystic duct dominated an anterior segment of the right hepatic lobe. We observed the right accessory hepatic duct using intraoperative cholangiography, and we were able to perform laparoscopic cholecystectomy without injuring it. He had no complication after discharge, and a drip-infusion cholangiography-computed tomography (DIC-CT) scan demonstrated that the right accessory hepatic duct was intact, and it dominated an anterior segment of the right hepatic lobe...
June 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28458830/duplicated-common-bile-duct-a-recipe-for-biliary-injury-report-of-a-new-variant
#9
Nabil M Nuamah, Cem Ibis, Ali F K Gok, Feza Ekiz, Bulent Acunas
Duplicated common bile duct, often associated with conditions like lithiasis, biliary cysts and pancreatobiliary maljunction, could result in highly morbid and potentially fatal biliary injuries. Precise preoperative diagnosis and classification still remain a challenge. A female patient undergoing emergency laparoscopic cholecystectomy for acute calculous cholecystitis sustained iatrogenic bile duct injury. A drainage tube was placed into the injured duct for post-operative conservative management. Post-operative tube cholangiogram revealed a double common bile duct with cystic duct opening distally...
February 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28335859/making-it-new-again-insight-into-liver-development-regeneration-and-disease-from-zebrafish-research
#10
REVIEW
Shuang Wang, Sophie R Miller, Elke A Ober, Kirsten C Sadler
The adult liver of most vertebrates is predominantly comprised of hepatocytes. However, these cells must work in concert with biliary, stellate, vascular, and immune cells to accomplish the vast array of hepatic functions required for physiological homeostasis. Our understanding of liver development was accelerated as zebrafish emerged as an ideal vertebrate system to study embryogenesis. Through work in zebrafish and other models, it is now clear that the cells in the liver develop in a coordinated fashion during embryogenesis through a complex yet incompletely understood set of molecular guidelines...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28287406/mesothelin-mucin-16-signaling-in-activated-portal-fibroblasts-regulates-cholestatic-liver-fibrosis
#11
Yukinori Koyama, Ping Wang, Shuang Liang, Keiko Iwaisako, Xiao Liu, Jun Xu, Mingjun Zhang, Mengxi Sun, Min Cong, Daniel Karin, Kojiro Taura, Chris Benner, Sven Heinz, Tapan Bera, David A Brenner, Tatiana Kisseleva
Cholestatic liver fibrosis is caused by obstruction of the biliary tract and is associated with early activation of portal fibroblasts (PFs) that express Thy-1, fibulin 2, and the recently identified marker mesothelin (MSLN). Here, we have demonstrated that activated PFs (aPFs) and myofibroblasts play a critical role in the pathogenesis of liver fibrosis induced by bile duct ligation (BDL). Conditional ablation of MSLN+ aPFs in BDL-injured mice attenuated liver fibrosis by approximately 50%. Similar results were observed in MSLN-deficient mice (Msln-/- mice) or mice deficient in the MSLN ligand mucin 16 (Muc16-/- mice)...
April 3, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28145662/unsuspected-duplicated-gallbladder-in-a-patient-presenting-with-acute-cholecystitis
#12
Woohyung Lee, Dae Hyun Song, Jin Kwon Lee, Ji Ho Park, Ju Yeon Kim, Seung Jin Kwag, Taejin Park, Sang Ho Jeong, Young Tae Ju, Eun Jung Jung, Young Joon Lee, Soon Chan Hong, Sang Kyung Choi, Chi Young Jeong
Duplicated gallbladder (GB) is a rare congenital disease. Surgical management of a duplicated GB needs special care because of concurrent bile duct anomalies and the risk of injuring adjacent arteries during surgery. An 80-year-old man visited an emergency room with right upper quadrant abdominal pain. Computed tomography (CT) revealed cholecystitis with a 2-bodied GB. Because of this unusual finding, magnetic resonance choledochopancreatography was performed to detect possible biliary anomalies. The 2 GB bodies were unified at the neck with a common cystic duct, a so-called V-shaped duplicated GB...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28138446/management-of-an-accessory-bile-duct-leak-following-pancreaticoduodenectomy-a-novel-approach-utilizing-a-percutaneous-and-endoscopic-rendezvous
#13
George A Rapp, Kari J Nelson, David K Imagawa, Jason Y Huang, John G Lee
Biliary leaks are uncommon but morbid complications of pancreaticoduodenectomies, which have historically been managed with percutaneous drainage, reoperation, or a combination of both. We report a de novo percutaneous-endoscopic hepaticojejunostomy from an anomalous right hepatic duct injured during pancreaticoduodenectomy to the afferent bowel limb. The percutaneous-endoscopic hepaticojejunostomy was stented to allow for tract formation with successful stent removal after 5.5 months. One year after the creation of the percutaneous-endoscopic hepaticojejunostomy, the patient remains clinically well without evidence of biliary leak or obstruction...
2017: ACG Case Reports Journal
https://www.readbyqxmd.com/read/27796316/ductular-reaction-on-a-chip-microfluidic-co-cultures-to-study-stem-cell-fate-selection-during-liver-injury
#14
Amranul Haque, Pantea Gheibi, Gulnaz Stybayeva, Yandong Gao, Natalie Torok, Alexander Revzin
Liver injury modulates local microenvironment, triggering production of signals that instruct stem cell fate choices. In this study, we employed a microfluidic co-culture system to recreate important interactions in the liver stem cell niche, those between adult hepatocytes and liver progenitor cells (LPCs). We demonstrate that pluripotent stem cell-derived LPCs choose hepatic fate when cultured next to healthy hepatocytes but begin biliary differentiation program when co-cultured with injured hepatocytes. We connect this fate selection to skewing in production of hepatocyte growth factor (HGF) and transforming growth factor (TGF)-β1 caused by injury...
October 31, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27497939/effectiveness-of-a-barbed-suture-in-the-repair-of-bile-duct-injury-during-laparoscopic-cholecystectomy-report-of-two-cases
#15
Yusuke Takahashi, Naoyuki Yokoyama, Natsumi Matsuzawa, Daisuke Sato, Tetsuya Otani
INTRODUCTION: Bile duct injury during laparoscopic cholecystectomy occurs in rare cases. We report two cases using barbed suture for repair in bile duct injury during laparoscopic cholecystectomies. PRESENTATION OF CASES: The first patient was a 73-year-old woman who underwent elective laparoscopic cholecystectomy for cholecystolithiasis. When the gallbladder was dissected from the bed, bile spillage was observed and an injured small bile duct was detected. The bile duct could not be managed using a titanium clip...
2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27391331/tlr4-deficiency-protects-against-hepatic-fibrosis-and-diethylnitrosamine-induced-pre-carcinogenic-liver-injury-in-fibrotic-liver
#16
Susanne Nicole Weber, Annika Bohner, Dianne H Dapito, Robert F Schwabe, Frank Lammert
BACKGROUND: The development of hepatocellular carcinoma (HCC) is a common consequence of advanced liver fibrosis but the interactions between fibrogenesis and carcinogenesis are still poorly understood. Recently it has been shown that HCC promotion depends on Toll-like receptor (TLR) 4. Pre-cancerogenous events can be modelled in mice by the administration of a single dose of diethylnitrosamine (DEN), with HCC formation depending amongst others on interleukin (IL) 6 production. Mice lacking the hepatocanalicular phosphatidylcholine transporter ABCB4 develop liver fibrosis spontaneously, resemble patients with sclerosing cholangitis due to mutations of the orthologous human gene, and represent a valid model to study tumour formation in pre-injured cholestatic liver...
2016: PloS One
https://www.readbyqxmd.com/read/27227904/stem-progenitor-cells-in-liver-regeneration
#17
REVIEW
Tohru Itoh
In severely or chronically injured livers where the proliferative capacity of hepatocytes is compromised, putative stem/progenitor cells are supposed to be activated. These cells are generally characterized as biliary epithelial cell marker-positive cells that emerge ectopically in the parenchymal region of the liver, as determined by histopathological examination of various liver diseases in humans and animal models. Whereas the biliary system indeed harbors cells with stem/progenitor activity that can be defined ex vivo, genetic lineage tracing studies in mice have casted doubt on their exact contribution as the genuine stem/progenitor cell population that differentiates in situ into hepatocytes...
August 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27065888/culture-model-of-rat-portal-myofibroblasts
#18
Haquima El Mourabit, Emilien Loeuillard, Sara Lemoinne, Axelle Cadoret, Chantal Housset
Myofibroblasts are matrix-producing cells with contractile properties, usually characterized by de novo expression of alpha-smooth muscle actin, that arise in fibrotic diseases. Hepatic stellate cells (HSCs), known as perisinusoidal cells containing auto-fluorescent vitamin A, are the major although not exclusive source of myofibroblasts in the injured liver. Portal myofibroblasts (PMFs) have been defined as liver myofibroblasts derived from cells that are distinct from HSCs and located in the portal tract...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27008166/complications-of-pancreato-duodenectomy
#19
REVIEW
V K Kapoor
UNLABELLED: Pancreato-duodenectomy (PD) is the procedure of choice for management of resectable periampullary and pancreatic cancers and some patients with chronic pancreatitis. PD is one of the most major GI/ HPB surgical procedures performed involving resection of multiple organs and reconstruction with multiple anastomoses. While mortality of PD has been brought down to less than 5% morbidity still remains high.Patients undergoing PD are usually elderly with comorbidities - general complications of a major operation e...
February 2016: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/26989053/stepwise-approach-to-curative-surgery-using-percutaneous-transhepatic-cholangiodrainage-and-portal-vein-embolization-for-severe-bile-duct-injury-during-laparoscopic-cholecystectomy-a-case-report
#20
Naruhiko Honmyo, Shintaro Kuroda, Tsuyoshi Kobayashi, Kohei Ishiyama, Kentaro Ide, Hiroyuki Tahara, Masahiro Ohira, Hideki Ohdan
Laparoscopic cholecystectomy (LC) has been recently adapted to acute cholecystitis. Major bile duct injury during LC, especially Strasberg-Bismuth classification type E, can be a critical problem sometimes requiring hepatectomy. Safety and definitive treatment without further morbidities, such as posthepatectomy liver failure, is required. Here, we report a case of severe bile duct injury treated with a stepwise approach using (99m)Tc-galactosyl human serum albumin ((99m)Tc-GSA) single-photon emission computed tomography (SPECT)/CT fusion imaging to accurately estimate liver function...
December 2016: Surgical Case Reports
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