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https://www.readbyqxmd.com/read/28445299/endoscopic-ultrasonography-predicts-early-esophageal-variceal-bleeding-in-liver-cirrhosis-a-case-report
#1
Changjun Men, Guoliang Zhang
RATIONALE: Bleeding esophageal and gastric varices constitute a serious complication in liver cirrhosis. Previous studies have shown that endoscopic ultrasonography (EUS) can be used to predict early esophageal variceal bleeding in liver cirrhosis. PATIENT CONCERNS: We report a case of a 46-year-old man with hepatitis B liver cirrhosis (CTP score, 5; Child-Pugh class, A) who was admitted to our hospital due to a decreased appetite lasting 1 week. DIAGNOSIS: He was initially diagnosed with decompensated hepatitis B cirrhosis; an abdominal computed tomography (CT) scan indicated a diagnosis of liver cirrhosis and portal hypertension (PHT)...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28442659/diagnostic-accuracy-of-endocardial-to-epicardial-myocardial-blood-flow-ratio-for-the-detection-of-significant-coronary-artery-disease-with-dynamic-myocardial-perfusion-dual-source-computed-tomography
#2
Yoshitaka Goto, Kakuya Kitagawa, Mio Uno, Shiro Nakamori, Tatsuro Ito, Naoki Nagasawa, Kaoru Dohi, Hajime Sakuma
BACKGROUND: Previous dynamic stress computed tomography perfusion (CTP) studies used absolute myocardial blood flow (MBF in mL/100 g/min) as a threshold to discriminate flow-limiting coronary artery disease (CAD), but absolute MBF can be vary because of multiple factors. The aim of this study was to compare the diagnostic performance of absolute MBF and the transmural perfusion ratio (TPR) for the detection of flow-limiting CAD, and to clarify the influence of CT delayed enhancement (CTDE) on the diagnostic performance of CTP...
April 25, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28439614/internal-carotid-artery-stenosis-and-collateral-recruitment-in-stroke-patients
#3
Jan W Dankbaar, Kelly G P Kerckhoffs, Alexander D Horsch, Irene C van der Schaaf, L Jaap Kappelle, Birgitta K Velthuis
PURPOSE: Leptomeningeal collaterals improve outcome in stroke patients. There is great individual variability in their extent. Internal carotid artery (ICA) stenosis may lead to more extensive recruitment of leptomeningeal collaterals. The purpose of this study was to evaluate the association of pre-existing ICA stenosis with leptomeningeal collateral filling visualized with computed tomography perfusion (CTP). METHODS: From a prospective acute ischemic stroke cohort, patients were included with an M1 middle cerebral artery (MCA) occlusion and absent ipsilateral, extracranial ICA occlusion...
April 24, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28437011/noise-reduction-and-functional-maps-image-quality-improvement-in-dynamic-ct-perfusion-using-a-new-k-means-clustering-guided-bilateral-filter-kmgb
#4
Francesco Pisana, Thomas Henzler, Stefan Schönberg, Ernst Klotz, Bernhard Schmidt, Marc Kachelrieß
PURPOSE: Dynamic CT perfusion (CTP) consists in repeated acquisitions of the same volume in different time steps, slightly before, during and slightly afterwards the injection of contrast media. Important functional information can be derived for each voxel, which reflect the local hemodynamic properties and hence the metabolism of the tissue. Different approaches are being investigated to exploit data redundancy and prior knowledge for noise reduction of such datasets, ranging from iterative reconstruction schemes to high dimensional filters...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28436707/samhd1-protects-cancer-cells-from-various-nucleoside-based-antimetabolites
#5
Nikolas Herold, Sean G Rudd, Kumar Sanjiv, Juliane Kutzner, Julia Bladh, Cynthia B J Paulin, Thomas Helleday, J I Henter, Torsten Schaller
Recently, we demonstrated that sterile alpha motif and HD domain containing protein 1 (SAMHD1) is a major barrier in acute myelogenous leukemic (AML) cells to the cytotoxicity of cytarabine (ara-C), the most important drug in AML treatment. Ara-C is intracellularly converted by the canonical dNTP synthesis pathway to ara-CTP, which serves as a substrate but not an allosteric activator of SAMHD1. Using an AML mouse model, we show here that wild type but not catalytically inactive SAMHD1 reduces ara-C treatment efficacy in vivo...
April 24, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28431825/single-subcortical-infarct-pathomechanism-assessed-by-thin-section-computed-tomography-perfusion
#6
Dong Hoon Shin, Ernst Klotz, Eung Yeop Kim
INTRODUCTION: The pathomechanism of a single subcortical infarct (SSI) may be better determined by assessing the perfusion status between parent artery and ischemic lesion. We aimed to compare the classifications into branch atheromatous disease (BAD) versus non-BAD based on diffusion-weighted imaging (DWI) or computed tomography perfusion (CTP), and to test whether a CTP-based classification improves the predicting power for progression in SSI (PSSI) compared to that by DWI. METHODS: We enrolled 109 consecutive patients with SSI examined by whole-supratentorial brain CTP and follow-up DWI...
April 18, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28431614/permeability-surface-area-product-analysis-in-malignant-brain-edema-prediction-a-pilot-study
#7
O Volny, P Cimflova, T-Y Lee, B K Menon, C D d'Esterre
BACKGROUND AND PURPOSE: Using an extended CT perfusion acquisition (150s), we sought to determine the association between perfusion parameters and malignant edema after ischemic stroke. METHODS: Patients (from prospective study PROVE-IT, NCT02184936) with terminal internal carotid artery±proximal middle cerebral occlusion were involved. CTA was assessed for clot location and status of leptomeningeal collaterals. The following CTP parameters were calculated within the ischemic territory and contralaterally: permeability surface area product (PS), cerebral blood flow (CBF) and cerebral blood volume (CBV)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28428719/safety-and-efficacy-of-tenofovir-in-chronic-hepatitis-b-related-decompensated-cirrhosis
#8
Soon Kyu Lee, Myeong Jun Song, Seok Hyun Kim, Byung Seok Lee, Tae Hee Lee, Young Woo Kang, Suk Bae Kim, Il Han Song, Hee Bok Chae, Soon Young Ko, Jae Dong Lee
AIM: To evaluate the safety and efficacy of tenofovir disoproxil fumarate (TDF) as a first-line therapy in decompensated liver disease. METHODS: We enrolled 174 chronic hepatitis B-related liver cirrhosis patients treated with 300 mg/d TDF at six Korean centers. Of the 174 cirrhosis patients, 57 were assigned to the decompensated cirrhosis group and 117 were assigned to the compensated cirrhosis group. We followed the patients for 12 mo and evaluated clinical outcomes, including biochemical, virological, and serological responses...
April 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28422996/overexpression-of-an-eazip-gene-devoid-of-transit-peptide-sequence-induced-leaf-variegation-in-tobacco
#9
Xiayu Guan, Zhijian Li, Zhiliang Zhang, Xiangying Wei, Jiahua Xie, Jianjun Chen, Qingxi Chen
Leaf variegation is an ornamental trait that is not only biologically but also economically important. In our previous study, a Mg-protoporphyrin IX monomethyl ester cyclase homologue, EaZIP (Epipremnum aureum leucine zipper) was found to be associated with leaf variegation in Epipremnum aureum (Linden & Andre) G.S. Bunting. The protein product of this nuclear-encoded gene is targeted back to chloroplast involving in chlorophyll biosynthesis. Based on a web-based homology analysis, the EaZIP was found to lack a chloroplast transit peptide (cTP) sequence...
2017: PloS One
https://www.readbyqxmd.com/read/28422043/real-world-efficacy-and-safety-of-ritonavir-boosted-paritaprevir-ombitasvir-dasabuvir-%C3%A2-ribavirin-for-hepatitis-c-genotype-1-final-results-of-the-rev1tal-study
#10
John Lubel, Simone Strasser, Katherine A Stuart, Gregory Dore, Alexander Thompson, Stephen Pianko, Steven Bollipo, Joanne L Mitchell, Vincenzo Fragomeli, Tracey Jones, Sarah Chivers, Paul Gow, David Iser, Miriam Levy, Edmund Tse, Alessia Gazzola, Wendy Cheng, Saroj Nazareth, Sam Galhenage, Amanda Wade, Martin Weltman, Alan Wigg, Gerry MacQuillan, Joe Sasadeusz, Jacob George, Amany Zekry, Stuart K Roberts
BACKGROUND: Limited data exist on the outcomes of ritonavir-boosted paritaprevir with ombitasvir and dasabuvir (PrOD) ± ribavirin in a real-world setting. The aim of this study was to compare the efficacy and safety of PrOD-based therapy in hepatitis C genotype 1 patients with and without cirrhosis, and to explore pre-treatment factors predictive of sustained viral response (SVR) and serious adverse events (SAEs) on treatment. METHODS: 451 patients with hepatitis C genotype 1 treated in 20 centres across Australia were included...
April 19, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28416670/alterations-in-cellular-metabolism-triggered-by-ura7-or-gln3-inactivation-cause-imbalanced-dntp-pools-and-increased-mutagenesis
#11
Tobias T Schmidt, Gloria Reyes, Kerstin Gries, Cemile Ümran Ceylan, Sushma Sharma, Matthias Meurer, Michael Knop, Andrei Chabes, Hans Hombauer
Eukaryotic DNA replication fidelity relies on the concerted action of DNA polymerase nucleotide selectivity, proofreading activity, and DNA mismatch repair (MMR). Nucleotide selectivity and proofreading are affected by the balance and concentration of deoxyribonucleotide (dNTP) pools, which are strictly regulated by ribonucleotide reductase (RNR). Mutations preventing DNA polymerase proofreading activity or MMR function cause mutator phenotypes and consequently increased cancer susceptibility. To identify genes not previously linked to high-fidelity DNA replication, we conducted a genome-wide screen in Saccharomyces cerevisiae using DNA polymerase active-site mutants as a "sensitized mutator background...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28413179/cyclic-thrombocytopenia-synchronizing-with-the-menstrual-cycle-showing-periodic-phases-of-thrombocytopenia-and-rebound-thrombocytosis
#12
Taro Kurihara, Masahiko Sumi, Hiroko Kaiume, Wataru Takeda, Takehiko Kirihara, Keijiro Sato, Toshimitsu Ueki, Yuki Hiroshima, Hikaru Kobayashi
A 37-year-old woman was admitted to our hospital for purpura involving the extremities and thrombocytopenia. Prednisolone (PSL) was administered based on a diagnosis of idiopathic thrombocytopenic purpura (ITP), but was not effective for maintaining her platelet count within the normal range, which showed cyclic fluctuation corresponding to the menstrual cycle. Therefore, we discontinued PSL, and cyclic thrombocytopenia (CTP) was diagnosed. CTP is a rare disease which is usually treated as ITP but with no response...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28412909/prolonged-perfusion-predicts-recurrent-ischemic-stroke-but-not-transient-ischemic-attack-in-patients-with-symptomatic-intracranial-stenosis
#13
Linfang Lan, Xinyi Leng, Vincent Ip, Thomas Leung, Yannie Soo, Jill Abrigo, Ka Sing Wong
BACKGROUND: Intracranial arterial stenosis (ICAS) is the dominant cause for ischemic stroke worldwide, with hemodynamic compromise as a crucial contributor. Prolonged perfusion is commonly observed in ICAS patients on CT perfusion (CTP) maps, while the clinical significance of this perfusion pattern has not been elucidated. METHODS: Patients having symptomatic ICAS of 50-99% stenosis with sustained downstream cerebral blood flow (CBF) were enrolled into this study...
April 13, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28406121/normalization-of-the-psychometric-hepatic-encephalopathy-score-for-diagnosis-of-minimal-hepatic-encephalopathy-in-turkey
#14
Bdo Coskun, M Ozen, S Gursoy, O Ozbakir, O K Poyrazoglu, M Baskol, G C Sezgin, M Yucesoy
AIM: To construct normal values for the tests of the psychometric hepatic encephalopathy score (PHES) and evaluate the prevalence of minimal hepatic encephalopathy (MHE) among Turkish patients with liver cirrhosis. MATERIALS AND METHODS: One hundred and eighty-five healthy subjects and sixty patients with liver cirrhosis without overt hepatic encephalopathy were included in the study. All subjects underwent psychometric tests, which include number connection test-A and B (NCT-A/B), serial dotting test (DST), line drawing test (LDT), and digit symbol test (DST) in the same day...
April 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28401188/samhd1-is-a-barrier-to-antimetabolite-based-cancer-therapies
#15
Sean G Rudd, Torsten Schaller, Nikolas Herold
The outcome of acute myelogenous leukemia (AML) therapy depends on the propensity of leukemic blasts to accumulate ara-CTP, the active triphosphate of cytarabine (ara-C). We identified sterile α motif and HD domain-containing protein 1 (SAMHD1) as an ara-CTPase that protects cancer cells from cytarabine-induced toxicity. Therefore, we propose targeting SAMHD1 as a strategy to potentiate cytarabine and possibly other antimetabolite-based therapies.
2017: Molecular & Cellular Oncology
https://www.readbyqxmd.com/read/28399931/pilot-study-comparing-the-childhood-arthritis-rheumatology-research-alliance-carra-systemic-juvenile-idiopathic-arthritis-consensus-treatment-plans
#16
Yukiko Kimura, Sriharsha Grevich, Timothy Beukelman, Esi Morgan, Peter A Nigrovic, Kelly Mieszkalski, T Brent Graham, Maria Ibarra, Norman Ilowite, Marisa Klein-Gitelman, Karen Onel, Sampath Prahalad, Marilynn Punaro, Sarah Ringold, Dana Toib, Heather Van Mater, Jennifer E Weiss, Pamela F Weiss, Laura E Schanberg
OBJECTIVES: To assess the feasibility of studying the comparative effectiveness of the Childhood Arthritis and Rheumatology Research Alliance (CARRA) consensus treatment plans (CTPs) for systemic Juvenile Idiopathic Arthritis (JIA) using an observational registry. METHODS: Untreated systemic JIA patients enrolled in the CARRA Registry were begun on one of 4 CTPs chosen by the treating physician and patient/family (glucocorticoid [GC] alone; methotrexate [MTX] ± GC; IL1 inhibitor [IL1i] ± GC; IL6 inhibitor [IL6i] ± GC)...
April 11, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28397859/an-optimized-transit-peptide-for-effective-targeting-of-diverse-foreign-proteins-into-chloroplasts-in-rice
#17
Bo-Ran Shen, Cheng-Hua Zhu, Zhen Yao, Li-Li Cui, Jian-Jun Zhang, Cheng-Wei Yang, Zheng-Hui He, Xin-Xiang Peng
Various chloroplast transit peptides (CTP) have been used to successfully target some foreign proteins into chloroplasts, but for other proteins these same CTPs have reduced localization efficiencies or fail completely. The underlying cause of the failures remains an open question, and more effective CTPs are needed. In this study, we initially observed that two E.coli enzymes, EcTSR and EcGCL, failed to be targeted into rice chloroplasts by the commonly-used rice rbcS transit peptide (rCTP) and were subsequently degraded...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28396038/severe-reduction-of-blood-lysosomal-acid-lipase-activity-in-cryptogenic-cirrhosis-a-nationwide-multicentre-cohort-study
#18
Francesco Angelico, Stefano Ginanni Corradini, Daniele Pastori, Silvia Fargion, Anna Ludovica Fracanzani, Mario Angelico, Luigi Bolondi, Giulia Tozzi, Pietro Luigi Pujatti, Giancarlo Labbadia, Gino Roberto Corazza, Maurizio Averna, Francesco Perticone, Giuseppe Croce, Marcello Persico, Tommaso Bucci, Francesco Baratta, Licia Polimeni, Maria Del Ben, Francesco Violi
BACKGROUND AND AIMS: Blood lysosomal acid lipase (LAL) is reduced in non-alcoholic steatohepatitis, which is the major cause of cryptogenic cirrhosis (CC); few data on LAL activity in CC do exist. We investigated LAL activity in a cohort of patients with liver cirrhosis. METHODS: This is a multicentre cohort study including 274 patients with liver cirrhosis of different aetiology from 19 centres of Internal Medicine, Gastroenterology and Hepatology distributed throughout Italy...
March 31, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28389614/computed-tomographic-perfusion-selection-and-clinical-outcomes-after-endovascular-therapy-in-large-vessel-occlusion-stroke
#19
Mehdi Bouslama, Diogo C Haussen, Jonathan A Grossberg, Seena Dehkharghani, Meredith T Bowen, Leticia C Rebello, Nicolas A Bianchi, Michael R Frankel, Raul G Nogueira
BACKGROUND AND PURPOSE: Different imaging paradigms have been used to select patients for endovascular therapy in stroke. We sought to determine whether computed tomographic perfusion (CTP) selection improves endovascular therapy outcomes compared with noncontrast computed tomography alone. METHODS: Review of a prospectively collected registry of anterior circulation stroke patients undergoing stent-retriever thrombectomy at a tertiary care center between September 2010 and March 2016...
April 7, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28380422/the-dominant-role-of-proofreading-exonuclease-activity-of-replicative-polymerase-%C3%AE%C2%B5-in-cellular-tolerance-to-cytarabine-ara-c
#20
Masataka Tsuda, Kazuhiro Terada, Masato Ooka, Koji Kobayashi, Hiroyuki Sasanuma, Ryo Fujisawa, Toshiki Tsurimoto, Junpei Yamamoto, Shigenori Iwai, Kei Kadoda, Remi Akagawa, Shar-Yin Naomi Huang, Yves Pommier, Julian E Sale, Shunichi Takeda, Kouji Hirota
Chemotherapeutic nucleoside analogs, such as Ara-C, 5-Fluorouracil (5-FU) and Trifluridine (FTD), are frequently incorporated into DNA by the replicative DNA polymerases. However, it remains unclear how this incorporation kills cycling cells. There are two possibilities: Nucleoside analog triphosphates inhibit the replicative DNA polymerases, and/or nucleotide analogs mis-incorporated into genomic DNA interfere with the next round of DNA synthesis as replicative DNA polymerases recognize them as template DNA lesions, arresting synthesis...
March 23, 2017: Oncotarget
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