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https://www.readbyqxmd.com/read/28230996/a-facile-n-mercaptoethoxyglycinamide-mega-linker-ap-proach-to-peptide-thioesterification-and-cyclization
#1
Patrick M M Shelton, Caroline E Weller, Champak Chatterjee
The C-terminal selective electrophilic activation of polypeptides is essential for site-specific peptide mod-ification and conjugation techniques such as Native Chemi-cal Ligation (NCL). Peptide C-terminal α-thioesters are par-ticularly valuable precursors for NCL, due to their hydrolytic stability in aqueous buffers and reactivity toward thiol nucle-ophiles. The synthesis of peptide α-thioesters, however, re-quires harsh acidic conditions or complex chemical manipu-lations, which ultimately limits their functional group com-patibility and broad utility...
February 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28230926/association-between-high-expression-of-phosphorylated-akt-and-mammalian-target-of-rapamycin-and-improved-survival-in-salivary-gland-adenoid-cystic-carcinoma
#2
Dai-Qiao Ouyang, Li-Zhong Liang, Zun-Fu Ke, Guang-Sen Zheng, De-Sheng Weng, Wei-Fa Yang, Yu-Xiong Su, Gui-Qing Liao
BACKGROUND: Previous genomic studies revealed phosphotidylinositol-3-kinase (PI3K)/Akt pathway mutation in human salivary gland adenoid cystic carcinoma (ACC). No validation of its prognostic value has been reported. METHODS: P-Akt, pan-Akt, phosphorylated-mammalian target of rapamycin (p-mTOR), PI3K, and insulin-like growth factor-1 receptor beta (IGF-1Rβ) were detected on 120 salivary gland ACC/adjacent salivary gland pairs immunohistochemically and were correlated with clinicopathological data...
February 23, 2017: Head & Neck
https://www.readbyqxmd.com/read/28230158/persistent-neuronal-activity-in-anterior-cingulate-cortex-correlates-with-sustained-attention-in-rats-regardless-of-sensory-modality
#3
Dingcheng Wu, Hanfei Deng, Xiong Xiao, Yanfang Zuo, Jingjing Sun, Zuoren Wang
The anterior cingulate cortex (ACC) has long been thought to regulate conflict between an object of attention and distractors during goal-directed sustained attention. However, it is unclear whether ACC serves to sustained attention itself. Here, we developed a task in which the time course of sustained attention could be controlled in rats. Then, using pharmacological lesion experiments, we employed it to assess function of ACC in sustained attention. We then recorded neuronal activity in ACC using multichannel extracellular recording techniques and identified specific ACC neurons persistently activated during the period of attention...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230157/highly-sensitive-and-adaptable-fluorescence-quenched-pair-discloses-the-substrate-specificity-profiles-in-diverse-protease-families
#4
Marcin Poreba, Aleksandra Szalek, Wioletta Rut, Paulina Kasperkiewicz, Izabela Rutkowska-Wlodarczyk, Scott J Snipas, Yoshifumi Itoh, Dusan Turk, Boris Turk, Christopher M Overall, Leszek Kaczmarek, Guy S Salvesen, Marcin Drag
Internally quenched fluorescent (IQF) peptide substrates originating from FRET (Förster Resonance Energy Transfer) are powerful tool for examining the activity and specificity of proteases, and a variety of donor/acceptor pairs are extensively used to design individual substrates and combinatorial libraries. We developed a highly sensitive and adaptable donor/acceptor pair that can be used to investigate the substrate specificity of cysteine proteases, serine proteases and metalloproteinases. This novel pair comprises 7-amino-4-carbamoylmethylcoumarin (ACC) as the fluorophore and 2,4-dinitrophenyl-lysine (Lys(DNP)) as the quencher...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28227043/study-of-functional-brain-homogeneity-in-female-patients-with-major-depressive-disorder
#5
X Zhang, Y Tang, Y Zhu, Y Li, S Tong, X Zhang, Y Tang, Y Zhu, Y Li, S Tong, Y Li, Y Zhu, S Tong, X Zhang, Y Tang
Women are at a twofold higher risk of developing major depressive disorder (MDD) than that of men. However, the investigation of female MDD patients functional brain activity is rare and the detailed mechanism remains unclear. The present work is to explore the altered spontaneous neural activity measured with regional homogeneity (ReHo) in female MDD patients using resting-state functional magnetic resonance imaging (fMRI) technique. Twelve MDD females and twelve matched healthy participants were included in the study...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227015/a-comparison-of-multimodal-biomarkers-for-chronic-hepatitis-b-assessment-using-recursive-feature-elimination
#6
Yanru Bai, Xin Chen, Changfeng Dong, Yingxia Liu, Zhiguo Zhang, Yanru Bai, Xin Chen, Changfeng Dong, Yingxia Liu, Zhiguo Zhang, Xin Chen, Changfeng Dong, Zhiguo Zhang, Yanru Bai, Yingxia Liu
An effective assessment of liver fibrosis in patients with chronic hepatitis B (CHB) is highly desired because it is important not only for clinical courses prediction, but also for the determination of antiviral therapy schemes. In recent years, various approaches for liver biopsies analysis have been highlighted, such as elastography techniques and serum markers, due to their properties of non-invasiveness. The aim of this study is to determine the best biomarkers or their combination by comparing multimodal biomarkers (ultrasound elastography parameters, biochemical hematologic parameters, and clinical parameters) for fibrosis assessment in chronic hepatitis B using a support vector machine combined with recursive feature elimination (RFE-SVM) approach...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225988/estimation-of-cardiovascular-risk-and-detection-of-subclinical-carotid-atheromatosis-in-patients-with-diabetes-without-a-history-of-cardiovascular-disease
#7
Walter Masson, Salvador De Francesca, Micaela Molinero, Daniel Siniawski, Andrés Mulassi, Frank Espinoza Morales, Melina Huerin, Martín Lobo, Graciela Molinero
Objectives: Cardiovascular risk estimated by several scores in patients with diabetes mellitus without a cardiovascular disease history and the association with carotid atherosclerotic plaque (CAP) were the aims of this study. Materials and methods: Cardiovascular risk was calculate using United Kingdom Prospective Diabetes Study (UKPDS) risk engine, Framingham risk score for cardiovascular (FSCV) and coronary disease (FSCD), and the new score (NS) proposed by the 2013 ACC/AHA Guideline on the Treatment of Blood Cholesterol...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225736/effects-of-long-term-musical-training-on-cortical-auditory-evoked-potentials
#8
Carolyn J Brown, Eun-Kyung Jeon, Virginia Driscoll, Bruna Mussoi, Shruti Balvalli Deshpande, Kate Gfeller, Paul J Abbas
OBJECTIVE: Evidence suggests that musicians, as a group, have superior frequency resolution abilities when compared with nonmusicians. It is possible to assess auditory discrimination using either behavioral or electrophysiologic methods. The purpose of this study was to determine if the acoustic change complex (ACC) is sensitive enough to reflect the differences in spectral processing exhibited by musicians and nonmusicians. DESIGN: Twenty individuals (10 musicians and 10 nonmusicians) participated in this study...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28225097/synthesis-and-structure-of-synthetically-pure-and-deuterated-amorphous-basic-calcium-carbonates
#9
Hsiu-Wen Wang, Luke L Daemen, Michael C Cheshire, Michelle K Kidder, Andrew G Stack, Lawrence F Allard, Jörg Neuefeind, Daniel Olds, Jue Liu, Katharine Page
It is generally believed that H2O and OH(-) are the key species stabilizing and controlling amorphous calcium carbonate "polyamorph" forms, and may in turn control the ultimate crystallization products during synthesis and in natural systems. Yet, the locations and hydrogen-bonding network of these species in ACC have never been measured directly using neutron diffraction. We report a synthesis route that overcomes the existing challenges with respect to yield quantities and deuteration, both of which are critically necessary for high quality neutron studies...
February 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28224933/inadequacy-of-existing-clinical-prediction-models-for-predicting-mortality-after-transcatheter-aortic-valve-implantation
#10
Glen P Martin, Matthew Sperrin, Peter F Ludman, Mark A de Belder, Chris P Gale, William D Toff, Neil E Moat, Uday Trivedi, Iain Buchan, Mamas A Mamas
BACKGROUND: The performance of emerging transcatheter aortic valve implantation (TAVI) clinical prediction models (CPMs) in national TAVI cohorts distinct from those where they have been derived is unknown. This study aimed to investigate the performance of the German Aortic Valve, FRANCE-2, OBSERVANT and American College of Cardiology (ACC) TAVI CPMs compared with the performance of historic cardiac CPMs such as the EuroSCORE and STS-PROM, in a large national TAVI registry. METHODS: The calibration and discrimination of each CPM were analyzed in 6676 patients from the UK TAVI registry, as a whole cohort and across several subgroups...
February 2017: American Heart Journal
https://www.readbyqxmd.com/read/28224465/long-term-outcomes-following-percutaneous-cholecystostomy-tube-placement-for-treatment-of-acute-calculous-cholecystitis
#11
Donna Marie L Alvino, Zhi Ven Fong, Colin J McCarthy, George Velmahos, Keith D Lillemoe, Peter R Mueller, Peter J Fagenholz
INTRODUCTION: Percutaneous cholecystostomy tube (PCT) placement is considered a safe alternative to cholecystectomy for the treatment of acute calculous cholecystitis (ACC), but data regarding long-term outcomes following PCT are limited. METHODS: We retrospectively reviewed our institutional experience of patients undergoing PCT for ACC between 1997 and 2015. Recurrent biliary events were defined as cholecystitis, cholangitis, or gallstone pancreatitis. RESULTS: PCT was placed for 288 patients with ACC...
February 21, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28224448/comparison-of-esc-and-acc-aha-guidelines-for-myocardial-revascularization
#12
Jim Stirrup, Alejandro Velasco, Fadi G Hage, Eliana Reyes
In 2014, the Task Force on Myocardial Revascularization of the European Society of Cardiology and the European Association for Cardio-Thoracic Surgery with the special contribution of the European Association of Percutaneous Cardiovascular Interventions published a comprehensive set of recommendations on myocardial revascularization in patients presenting with acute or chronic coronary artery disease. In the United States, pertinent guidance on this topic has been published by the American College of Cardiology, American Heart Association and other relevant societies in multiple guideline documents that have been published in recent years...
February 21, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28223484/rhythmic-brain-stimulation-reduces-anxiety-related-behavior-in-a-mouse-model-based-on-meditation-training
#13
Aldis P Weible, Denise M Piscopo, Mary K Rothbart, Michael I Posner, Cristopher M Niell
Meditation training induces changes at both the behavioral and neural levels. A month of meditation training can reduce self-reported anxiety and other dimensions of negative affect. It also can change white matter as measured by diffusion tensor imaging and increase resting-state midline frontal theta activity. The current study tests the hypothesis that imposing rhythms in the mouse anterior cingulate cortex (ACC), by using optogenetics to induce oscillations in activity, can produce behavioral changes. Mice were randomly assigned to groups and were given twenty 30-min sessions of light pulses delivered at 1, 8, or 40 Hz over 4 wk or were assigned to a no-laser control condition...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28223285/butyrate-regulates-liver-mitochondrial-function-efficiency-and-dynamic-in-insulin-resistant-obese-mice
#14
Maria Pina Mollica, Giuseppina Mattace Raso, Gina Cavaliere, Giovanna Trinchese, Chiara De Filippo, Serena Aceto, Marina Prisco, Claudio Pirozzi, Francesca Di Guida, Adriano Lama, Marianna Crispino, Diana Tronino, Paola Di Vaio, Roberto Berni Canani, Antonio Calignano, Rosaria Meli
Fatty liver, oxidative stress, and mitochondrial dysfunction are key pathophysiological features of insulin resistance and obesity. Butyrate, produced by fermentation in the large intestine by gut microbiota, and its synthetic derivative, the N-(1-carbamoyl-2-phenyl-ethyl) butyramide, FBA, have been demonstrated to be protective against insulin resistance and fatty liver.Here, hepatic mitochondria were identified as the main target of the beneficial effect of both butyrate-based compounds in reverting insulin resistance and fat accumulation in diet induced obese mice...
February 21, 2017: Diabetes
https://www.readbyqxmd.com/read/28223016/lymph-node-involvement-predicts-poor-prognosis-in-primary-tongue-adenoid-cystic-carcinoma-a-preliminary-study-of-54-cases
#15
Nannan Han, Huishan Ong, Zhihui Liu, Min Ruan, Wenjun Yang, Chenping Zhang
PURPOSE: Primary tongue adenoid cystic carcinoma (ACC) is extremely rare. The relationship between the patient's prognosis and the tumor's clinicopathological characteristics is uncertain. The aim of this study was to identify the prognostic factors and analyze the overall outcomes for patients with tongue ACC. PATIENTS AND METHODS: A retrospective analysis of the medical records of patients diagnosed with primary tongue ACC between 1998 and 2008 was conducted. The study comprised 54 patients, with a median age of 53...
January 25, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28222936/36-cases-adenoid-cystic-carcinoma-of-the-breast-in-china-comparison-with-matched-grade-one-invasive-ductal-carcinoma-not-otherwise-specified
#16
Shuling Wang, Weidong Li, Fang Wang, Yun Niu, Chunfang Hao, Xu Wang, Lihong He, Zhongsheng Tong
OBJECTIVE: The aim of this study was to investigate the clinicopathological characteristic of adenoid cystic carcinoma (ACC). MATERIALS AND METHODS: The clininopathological features, along with relapse free survival(RFS) and overall survival(OS) of 36 patients with ACC were retrospectively investigated and compared with those of 108 grade 1 invasive ductal carcinoma not-otherwise-specified (G1-IDC-NOS) patients. RESULTS: Most cases of ACC were ER, PR and HER-2 negative which was classified as triple-negative subtype...
January 31, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28222526/the-impact-of-alzheimer-s-disease-on-the-resting-state-functional-connectivity-of-brain-regions-modulating-pain-a-cross-sectional-study
#17
Todd B Monroe, Paul A Beach, Stephen P Bruehl, Mary S Dietrich, Baxter P Rogers, John C Gore, Sebastian W Atalla, Ronald L Cowan
BACKGROUND: It is currently unknown why people with Alzheimer's disease (AD) receive less pain medication and report pain less frequently. OBJECTIVE: The purpose of this study was to determine the impact of AD on thermal psychophysics and resting-state functional connectivity (RSFC) among sensory, affective, descending modulatory, and default mode structures. METHODS: Controls (n = 23, 13 = female) and age-matched people with AD (n = 23, 13 = females) underwent psychophysical testing to rate perceptions of warmth, mild, and moderate pain and then completed resting-state fMRI...
February 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28220826/different-brain-structures-associated-with-artistic-and-scientific-creativity-a-voxel-based-morphometry-study
#18
Baoguo Shi, Xiaoqing Cao, Qunlin Chen, Kaixiang Zhuang, Jiang Qiu
Creativity is the ability to produce original and valuable ideas or behaviors. In real life, artistic and scientific creativity promoted the development of human civilization; however, to date, no studies have systematically investigated differences in the brain structures responsible for artistic and scientific creativity in a large sample. Using voxel-based morphometry (VBM), this study identified differences in regional gray matter volume (GMV) across the brain between artistic and scientific creativity (assessed by the Creative Achievement Questionnaire) in 356 young, healthy subjects...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220797/elevated-choline-containing-compound-levels-in-rapid-cycling-bipolar-disorder
#19
Bo Cao, Jeffrey A Stanley, Ives Cavalcante Passos, Benson Mwangi, Sudhakar Selvaraj, Giovana B Zunta-Soares, Jair C Soares
Previous studies have found increased levels of choline-containing compounds [ie, glycerophosphocholine plus phosphocholine (GPC+PC)] in bipolar disorder using in vivo proton magnetic resonance spectroscopy (¹H MRS), especially in bipolar I disorder (BD-I). Increased levels of GPC+PC suggest alterations in the membrane phospholipids metabolism in bipolar disorder. Rapid cycling (RC) bipolar disorder is considered as a severe course of bipolar disorder, but it is unclear whether rapid cycling bipolar disorder is linked to highly altered membrane phospholipid metabolism...
February 21, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28220633/fatty-acid-composition-fat-deposition-lipogenic-gene-expression-and-performance-of-broiler-fed-diet-supplemented-with-different-sources-of-oil
#20
Jannatara Khatun, Teck Chwen Loh, Henny Akit, Hooi Ling Foo, Rosfarizan Mohamad
The present study assessed the effect of feeding palm oil (PO), sunflower oil (SO) and their combination on performance, fat deposition, fatty acid composition and lipogenic gene expression of broilers reared for 42 days. A total of 144 1-day-old broilers (Cobb500) were randomly allotted into four treatment diets with each having six replicates of six chicks in each replicate following a completely randomized design. Live weight gain and feed efficiency was significantly (P < 0.05) higher in birds fed with a combination of oil sources compared to controls...
February 21, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
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