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https://www.readbyqxmd.com/read/28716421/dual-functioning-of-plant-arginases-provides-a-third-route-for-putrescine-synthesis
#1
Jigar Patel, Menaka Ariyaratne, Sheaza Ahmed, Lingxiao Ge, Vipaporn Phuntumart, Andrea Kalinoski, Paul F Morris
Two biosynthetic routes are known for putrescine, an essential plant metabolite. Ornithine decarboxylase (ODC) converts ornithine directly to putrescine, while a second route for putrescine biosynthesis utilizes arginine decarboxylase (ADC) to convert arginine to agmatine, and two additional enzymes, agmatine iminohydrolase (AIH) and N-carbamoyl putrescine aminohydrolase (NLP1) to complete this pathway. Here we show that plants can use ADC and arginase/agmatinase (ARGAH) as a third route for putrescine synthesis...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28703133/association-of-autoimmune-hepatitis-with-src-homology-2-adaptor-protein-3-gene-polymorphisms-in-japanese-patients
#2
Takeji Umemura, Satoru Joshita, Hideaki Hamano, Kaname Yoshizawa, Shigeyuki Kawa, Eiji Tanaka, Masao Ota
Autoimmune hepatitis (AIH) is a chronic inflammatory liver disease characterized by an autoimmune reaction to hepatocytes. The Src homology 2 adaptor protein 3 (SH2B3) gene is a member of the SH2B family of adaptor proteins that has been implicated in the integration and regulation of multiple signaling events. SH2B3 is involved in cytokine signaling pathways and serves as a negative mediator of T-cell receptor signaling. Genome-wide association analyses in Caucasians have linked a missense mutation at rs3184504 in SH2B3 with AIH...
July 13, 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28700730/pediatric-autoimmune-hepatitis-shows-a-disproportionate-decline-of-regulatory-t-cells-in-the-liver-and-of-il-2-in-the-blood-of-patients-undergoing-therapy
#3
Jana Diestelhorst, Norman Junge, Jerome Schlue, Christine S Falk, Michael P Manns, Ulrich Baumann, Elmar Jaeckel, Richard Taubert
BACKGROUND & AIMS: The autoimmune hepatitis (AIH) is a chronic hepatitis driven by the adaptive immunity that affects all age groups. A functional and numerical regulatory T cell (Treg) defect has been reported in pediatric AIH (pAIH), while an intrahepatic increase in adult AIH (aAIH) patients has been detected in current research findings. METHODS: Therefore, we quantified the intrahepatic numbers of Treg, T and B cells, as well as serum cytokine levels before and during therapy in pAIH...
2017: PloS One
https://www.readbyqxmd.com/read/28694068/jkb-122-is-effective-alone-or-in-combination-with-prednisolone-in-con-a-induced-hepatitis
#4
Mei-Chi Hsu, Sheng-Hung Liu, Chiung-Wen Wang, Nai-Yun Hu, Edwin S C Wu, Ying-Chu Shih, Peter J S Chiu
Con A-induced hepatitis in mice is an established model of autoimmune hepatitis (AIH). JKB-122, a toll-like receptor 4 (TLR4) antagonist, was tested for hepatotprotectant activity. Within several hours of Con A challenge (15mg/kg iv), increased production of proinflammatory cytokines with inflammatory infiltrate occurred in the liver. The severity of tissue necrosis and the amount of circulating liver enzymes peak at 24h post Con A challenge. JKB-122 was given 24 and 16h before, then concurrently, and 4 and 8h (× 5 doses) after challenge with Con A...
July 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28687032/granular-tri-metal-oxide-adsorbent-for-fluoride-uptake-adsorption-kinetic-and-equilibrium-studies
#5
Aihe Wang, Kanggen Zhou, Xing Liu, Fang Liu, Chun Zhang, Quanzhou Chen
A novel adsorbent embedding Mg-Al-Zr mixed oxides with millimetre-sized calcium alginate beads (SA-CMAZ) was synthesized, characterized, and applied for the secondary removal of fluoride from wastewater. Key factors affecting the fluoride adsorption, including initial fluoride concentration, contact time, initial pH and coexisting anions, were investigated. The results showed that fluoride could be removed by SA-CMAZ over a wide pH range, from 4 to 10. The presence of coexisting anions weakened the adsorption of fluoride, and the decreasing order of the removal towards fluoride was PO4(3-)>CO3(2-)>SO4(2-)>NO3(-)...
June 23, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28685471/gold-nanoparticle-based-fluorescent-contrast-agent-with-enhanced-sensitivity
#6
Kyung Aih Kang, Mai-Dung Nguyen
Gold nanoparticle (GNP) based contrast agents that are highly specific and sensitive for both optical and X-ray/CT imaging modalities are being developed for detecting the cancer expressing nucleolin and matrix metallo-proteinase 14 (MMP-14) on the cell membrane: Nucleolin is normally present in the nucleus. For many cancer cells, however, it is over-expressed on the cell membrane, having it to be a good cancer marker. Aptamer AS1411 is known to be an excellent target for nucleolin and also known to treat several cancer types; and MMP-14 in cancer is involved in tumor angiogenesis, blood vessel re-organization, and metastasis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28675685/challenges-and-difficulties-in-pathological-diagnosis-of-autoimmune-hepatitis
#7
REVIEW
Kenichi Harada, Nguyen Canh Hiep, Hiromasa Ohira
Autoimmune hepatitis (AIH) with acute presentation is widely recognized as a distinct clinical entity, and its clinicopathology has been extensively studied. In most cases, AIH with acute presentation is merely acute exacerbation of classical chronic AIH, but pure acute-onset AIH without previous symptoms of chronic liver disease is also encountered. Rapid diagnosis and initiation of immunosuppressive treatment are necessary for both acute exacerbation and acute-onset to prevent fatal liver failure. The diagnostic criteria commonly used for classical AIH are generally applicable to acute exacerbation, but acute-onset AIH may present with additional pathological features...
July 3, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28673760/the-influence-of-sleep-disordered-breathing-in-rem-sleep-behavior-disorder
#8
Paulo Bugalho, Marcelo Mendonça, Raquel Barbosa, Manuel Salavisa
OBJECTIVES/BACKGROUND: Because both REM sleep behavior disorder (RBD) and Obstructive Sleep Apnea (OSA) can present with similar symptoms, it is important to understand the influence of OSA in the clinical manifestations of RBD and whether RBD modulates OSA severity. Our objectives were to compare: 1. the intensity of non-motor symptoms between RBD patients with (RBD-OSA) and without OSA (RBD-non-OSA), and 2. polysomnographic features between RBD-OSA and OSA without RBD (OSA-non-RBD) patients...
June 1, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28663066/successful-management-of-acute-liver-failure-in-italian-children-a-16-year-experience-at-a-referral-centre-for-paediatric-liver-transplantation
#9
A Di Giorgio, A Sonzogni, A Piccichè, G Alessio, E Bonanomi, M Colledan, L D'Antiga
BACKGROUND: Identifying the causes of acute liver failure (ALF) and predictors of death or liver transplantation (LTX) is crucial to decide its management. We aimed to describe features and outcome of ALF in Italian children. METHODS: Retrospective review of cases presenting between 1996-2012. ALF was defined by high transaminases, INR ≥2.0 regardless of hepatic encephalopathy (HE), no evidence of underlying chronic liver disease. RESULTS: 55 children (median age 2...
June 12, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28660716/diagnostic-utility-of-radiological-heterogeneity-in-acute-severe-fulminant-autoimmune-hepatitis
#10
Keiichi Fujiwara, Shin Yasui, Osamu Yokosuka, Shigeto Oda, Naoya Kato
BACKGROUND: Histological examination is useful for the diagnosis of acute severe (fulminant) autoimmune hepatitis (AIH), but it is sometimes difficult to perform liver biopsy due to the complicated coagulopathy and ascites. We have shown that heterogeneous hypoattenuation on unenhanced computed tomography (CT) is a characteristic imaging feature of acute severe (fulminant) AIH. In the present study, we examined the utility of the imaging feature by applying the score to diagnose acute severe (fulminant) AIH...
June 29, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/28644343/second-line-agents-in-pediatric-patients-with-autoimmune-hepatitis-a-systematic-review-and-meta-analysis
#11
Andréanne N Zizzo, Pamela L Valentino, Prakesh S Shah, Binita M Kamath
BACKGROUND AND AIMS: Ten percent to 20% of children with autoimmune hepatitis (AIH) require second-line therapy to achieve remission. Although current guidelines exist on first-line management, evidence for second-line therapy in treatment-refractory patients is lacking. Our aim was to perform a systematic review and meta-analysis of the efficacy and safety of second-line treatments used in this population. METHODS: Electronic and manual searches were used to identify potential studies for inclusion...
July 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28638227/relationship-between-serum-adenosine-deaminase-levels-and-liver-histology-in-autoimmune-hepatitis
#12
Murat Torgutalp, Cumali Efe, Hakan Babaoglu, Taylan Kav
AIM: To evaluate the relationship between serum adenosine deaminase (ADA) levels and histological features in patients with autoimmune hepatitis (AIH). METHODS: A total of 80 subjects (52 AIH cases and 28 healthy controls) were included in the study. Patients were diagnosed according to the simplified criteria suggested by the International Autoimmune Hepatitis Group. All of the cases had been diagnosed with AIH between 2010-2015 at Hacettepe University, Department of Gastroenterology...
June 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28630652/verification-of-b-lymphocyte-activating-factor-s-involvement-in-the-exacerbation-of-insulin-resistance-as-well-as-an-autoimmune-response-in-patients-with-nonalcoholic-steatohepatitis-and-patients-with-hcv-related-chronic-liver-disease
#13
Takashi Himoto, Koji Fujita, Takako Nomura, Joji Tani, Asahiro Morishita, Hirohito Yoneyama, Reiji Haba, Tsutomu Masaki
BACKGROUND: Ten to forty percent of nonalcoholic steatohepatitis (NASH) and HCV-related chronic liver disease (CLD-C) patients have antinuclear antibodies (ANAs). However, the relationship between autoimmune response and insulin resistance remains uncertain among those patients. The primary purpose of this study was to investigate whether or not ANA status was associated with the development of insulin resistance and obesity in NASH and CLD-C patients. METHODS: Degrees of hepatic fibrosis and steatosis were evaluated by the classification proposed by Brunt et al...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28626376/successful-treatment-for-chronic-hepatitis-c-autoimmune-hepatitis-overlap-syndrome-due-to-daclatasvir-and-asunaprevir
#14
Ayumi Sugiura, Shuichi Wada, Hiromitsu Mori, Takefumi Kimura, Yoshiaki Matsuda, Naoki Tanaka, Eiji Tanaka, Kendo Kiyosawa
Persistent hepatitis C virus (HCV) infection may induce autoimmune diseases and chronic hepatitis C is sometimes accompanied by autoimmune hepatitis (AIH). However, we are worried about the treatment for chronic hepatitis C-AIH overlap syndrome because interferon-based antiviral therapies may enhance autoimmunity and immunosuppressive corticosteroid administration may promote viral replication. Here, we report a patient having chronic hepatitis C-AIH overlap syndrome treated with the direct-acting antivirals (DAA), daclatasvir and asunaprevir...
May 2017: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28624107/recurrence-of-primary-sclerosing-cholangitis-primary-biliary-cholangitis-and-auto-immune-hepatitis-after-liver-transplantation
#15
REVIEW
T Visseren, S Darwish Murad
Liver transplantation is a well-accepted treatment for decompensated chronic liver disease due to primary sclerosing cholangitis (PSC), primary biliary cholangitis (PBC) and auto-immune hepatitis (AIH). Survival after liver transplantation is generally good with 1 and 5-year survival rates around 90% and 70-85%. After transplantation, however, these diseases recur in 8.6-27% (rPSC), 10.9-42.3% (rPBC) and 7-42% (rAIH), and this poses significant challenges in terms of management and graft outcome in these patients...
April 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28603052/efficacy-and-safety-of-mycophenolate-mofetil-and-tacrolimus-as-second-line-therapy-for-patients-with-autoimmune-hepatitis
#16
Cumali Efe, Hannes Hagström, Henriette Ytting, Rahima A Bhanji, Niklas F Müller, Qixia Wang, Tugrul Purnak, Luigi Muratori, Mårten Werner, Hanns-Ulrich Marschall, Paolo Muratori, Fulya Gunşar, Daniel Klintman, Albert Parés, Alexandra Heurgué-Berlot, Thomas D Schiano, Mustafa Cengiz, Michele May-Sien Tana, Xiong Ma, Aldo J Montano-Loza, Thomas Berg, Sumita Verma, Fin Stolze Larsen, Ersan Ozaslan, Michael A Heneghan, Eric M Yoshida, Staffan Wahlin
BACKGROUND: Predniso(lo)ne, alone or in combination with azathioprine, is the standard of care (SOC) therapy for autoimmune hepatitis (AIH). However, the SOC therapy is poorly tolerated or does not control disease activity in up to 20% of patients. We assessed the efficacy of mycophenolate mofetil (MMF) and tacrolimus as second-line therapy for patients with AIH. PATIENTS AND METHODS: We performed a retrospective study of data (from 19 centres in Europe, the United States, Canada, and China) from 201 patients with AIH who received second-line therapy (121 received MMF and 80 received tacrolimus), for a median of 62 months (range, 6-190 months)...
June 8, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28597951/treg-conditioning-endows-activated-teff-with-suppressor-function-in-autoimmune-hepatitis-autoimmune-sclerosing-cholangitis
#17
Rodrigo Liberal, Charlotte R Grant, Muhammed Yuksel, Jonathon Graham, Alireza Kalbasi, Yun Ma, Michael A Heneghan, Giorgina Mieli-Vergani, Diego Vergani, Maria Serena Longhi
Imbalance between T regulatory (Treg) and T effector (Teff) cells is likely to contribute to induction and perpetuation of liver damage in autoimmune hepatitis (AIH) and autoimmune sclerosing cholangitis (AISC) either through inability of Tregs to restrain proliferation and effector cytokine production by responders or through conversion of Tregs into T helper type 1 (Th1) or type 17 (Th17) effector lymphocytes. We investigated the effect of Treg skewing on the phenotypic and functional properties of CD4(+) CD127(+) CD25(high) cells, an activated subset of Teff, in 32 patients with AIH, 20 with AISC and in 36 healthy subjects (HS)...
June 9, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28596110/crosstalk-between-type-ii-nkt-cells-and-t-cells-leads-to-spontaneous-chronic-inflammatory-liver-disease
#18
Xiufang Weng, Ying He, Lavanya Visvabharathy, Chia-Min Liao, Xiaosheng Tan, Arjun Balakumar, Chyung-Ru Wang
BACKGROUND & AIM: NKT cells are CD1d-restricted innate-like T cells that modulate innate and adaptive immune responses. Unlike the well-characterized invariant/type I NKT cells, type II NKT cells with a diverse TCR repertoire are poorly understood. This study defines the pathogenic role of type II NKT cells in the etiology of chronic liver inflammation. METHODS: Transgenic mice with the Lck promoter directing CD1d overexpression on T cells in Jα18 wild-type (Lck-CD1dTgJα18(+); type I NKT cell sufficient) and Jα18-deficient (Lck-CD1dTgJα18(o), type I NKT cell deficient) mice were analyzed for liver pathology and crosstalk between type II NKT cells and conventional T cells...
June 5, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28595203/parameters-of-ventricular-repolarization-in-patients-with-autoimmune-hepatitis
#19
Burak Açar, Mahmut Yüksel, Çağrı Yayla, Özgür Kırbaş, Sefa Ünal, Ahmet Göktuğ Ertem, Koray Demirtaş, Mustafa Kaplan, Meral Akdoğan, Sabite Kaçar, Ertuğrul Kayaçetin, Sinan Aydoğdu
OBJECTIVE: Autoimmune hepatitis (AIH) is a liver disorder that affects both children and adults. It is characterized by inflammatory liver histology, elevated transaminase level, circulating nonorgan-specific autoantibodies, and increased level of immunoglobulin G in the absence of known etiology. Ventricular repolarization has been evaluated using T wave and QT interval measurements in patients with hepatic cirrhosis. Ventricular repolarization may be defined using QT interval, QT dispersion, and T wave measurements...
June 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28594937/hyperferritinemia-and-hypergammaglobulinemia-predict-the-treatment-response-to-standard-therapy-in-autoimmune-hepatitis
#20
Richard Taubert, Matthias Hardtke-Wolenski, Fatih Noyan, Claudine Lalanne, Danny Jonigk, Jerome Schlue, Till Krech, Ralf Lichtinghagen, Christine S Falk, Verena Schlaphoff, Heike Bantel, Luigi Muratori, Michael P Manns, Elmar Jaeckel
Autoimmune hepatitis (AIH) is a chronic hepatitis with an increasing incidence. The majority of patients require life-long immunosuppression and incomplete treatment response is associated with a disease progression. An abnormal iron homeostasis or hyperferritinemia is associated with worse outcome in other chronic liver diseases and after liver transplantation. We assessed the capacity of baseline parameters including the iron status to predict the treatment response upon standard therapy in 109 patients with untreated AIH type 1 (AIH-1) in a retrospective single center study...
2017: PloS One
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