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https://www.readbyqxmd.com/read/29684805/detecting-a-rare-composite-small-bowel-lymphoma-by-magnetic-resonance-imaging-coincidentally-a-case-report-with-radiological-surgical-and-histopathological-features
#1
M Pezzella, B Brogna, A Romano, F Torelli, G Esposito, M Petrillo, F M Romano, N Di Martino, A Reginelli, R Grassi
INTRODUCTION: Diagnosing lymphoma continues to prove challenging in the clinical practice. Composite lymphoma (CL) is defined by the coexistence of different lymphoma subtypes in the same anatomical location. This condition has seldom been witnessed in the gastrointestinal (GI) tract. We weren't able to find previous cases in the literature about small bowel CL with follicular lymphoma (FL) and classical Hodgkin lymphoma (CHL). Surgery is the treatment of choice to obtain accurate histology, to manage and prevent acute complications...
April 16, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29684685/the-identification-of-discontinuous-epitope-in-the-human-cystatin-c-monoclonal-antibody-hcc3-complex
#2
M Rafalik, M Spodzieja, A S Kołodziejczyk, S Rodziewicz-Motowidło, A Szymańska, A Grubb, P Czaplewska
Human cystatin C (hCC) is a cysteine proteinase inhibitor involved in pathophysiological processes of dimerization and amyloid formation. These processes are directly associated with a number of neurodegenerative disorders such as Alzheimer disease or hereditary cystatin C amyloid angiopathy (HCCAA). One of the ideas on how to prevent amyloid formation is to use immunotherapy. HCC3 is one of a group of antibodies binding to hCC and reducing the in vitro formation of cystatin C dimers. Therefore, identification of the binding sites in the hCC-HCC3 complex may facilitate a search of effective drugs against HCCAA as well as understanding the mechanisms of neurodegenerative disorders...
April 20, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29684381/serum-chloride-as-a-novel-marker-for-adding-prognostic-information-of-mortality-in-chronic-heart-failure
#3
Yang Zhang, Rui Peng, Xinqiang Li, Jinxing Yu, Xi Chen, Zhou Zhou
BACKGROUND: Serum chloride concentrations have clinical significance in the prognosis of heart failure (HF). Little is known regarding the prognostic value of serum chloride in patients with chronic heart failure (CHF). This study sought to investigate the prognostic ability of admission serum chloride for long-term mortality in CHF patients. METHODS: We recruited 1021 patients diagnosed with CHF. Participants were followed up for all-cause mortality at 21 ± 9 months to establish the survival models and analyze the association between admission serum chloride concentrations and death risk...
April 20, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29684348/crystal-structure-of-a-thermophilic-o-6-alkylguanine-dna-alkyltransferase-derived-self-labeling-protein-tag-in-covalent-complex-with-a-fluorescent-probe
#4
Franca Rossi, Castrese Morrone, Alberto Massarotti, Davide Maria Ferraris, Anna Valenti, Giuseppe Perugino, Riccardo Miggiano
The self-labeling protein tags are robust and versatile tools for studying different molecular aspects of cell biology. In order to be suitable for a wide spectrum of experimental conditions, it is mandatory that these systems are stable after the fluorescent labeling reaction and do not alter the properties of the fusion partner. SsOGT-H5 is an engineered variant alkylguanine-DNA-alkyl-transferase (OGT) of the hyperthermophilic archaeon Sulfolobus solfataricus, and it represents an alternative solution to the SNAP-tag® technology under harsh reaction conditions...
April 20, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29684324/taxonomic-distribution-structure-function-relationship-and-metabolic-context-of-the-two-families-of-sulfide-dehydrogenases-sqr-and-fcsd
#5
Filipe M Sousa, Juliana G Pereira, Bruno C Marreiros, Manuela M Pereira
Hydrogen sulfide (H2 S) is a versatile molecule with different functions in living organisms: it can work as a metabolite of sulfur and energetic metabolism or as a signaling molecule in higher Eukaryotes. H2 S is also highly toxic since it is able to inhibit heme cooper oxygen reductases, preventing oxidative phosphorylation. Due to the fact that it can both inhibit and feed the respiratory chain, the immediate role of H2 S on energy metabolism crucially relies on its bioavailability, meaning that studying the central players involved in the H2 S homeostasis is key for understanding sulfide metabolism...
April 20, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29684272/on-the-catalytic-mechanism-of-acetyl-transfer-catalysed-by-mycobacterium-tuberculosis-glmu
#6
Peter D Craggs, Stephane Mouilleron, Martin Rejzek, Cesira Chiara, Robert J Young, Robert A Field, Argyrides Argyrou, Luiz Pedro S de Carvalho
The biosynthetic pathway of peptidoglycan is essential for Mycobacterium tuberculosis. We report here the acetyltransferase substrate specificity and catalytic mechanism of the bifunctional N-acetyltransferase/uridyltransferase from M. tuberculosis (GlmU). This enzyme is responsible for the final two steps of the synthesis of UDP-N-acetylglucosamine, which is an essential precursor of peptidoglycan, from glucosamine-1-phosphate, acetyl coenzyme A and uridine-5'-triphosphate. GlmU utilizes requires ternary complex formation to transfer an acetyl from acetyl coenzyme A to glucosamine-1-phosphate to form N-acetylglucosmaine-1-phosphate...
April 23, 2018: Biochemistry
https://www.readbyqxmd.com/read/29684204/crystal-structures-of-thrombin-in-complex-with-chemically-modified-thrombin-dna-aptamers-reveal-the-origins-of-enhanced-affinity
#7
Rafal Dolot, Curtis H Lam, Malgorzata Sierant, Qiang Zhao, Feng-Wu Liu, Barbara Nawrot, Martin Egli, Xianbin Yang
Thrombin-binding aptamer (TBA) is a DNA 15-mer of sequence 5'-GGT TGG TGT GGT TGG-3' that folds into a G-quadruplex structure linked by two T-T loops located on one side and a T-G-T loop on the other. These loops are critical for post-SELEX modification to improve TBA target affinity. With this goal in mind we synthesized a T analog, 5-(indolyl-3-acetyl-3-amino-1-propenyl)-2'-deoxyuridine (W) to substitute one T or a pair of Ts. Subsequently, the affinity for each analog was determined by biolayer interferometry...
April 19, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29684008/diversity-in-binding-regulation-and-evolution-revealed-from-high-throughput-chip
#8
Sneha Mitra, Anushua Biswas, Leelavati Narlikar
Genome-wide in vivo protein-DNA interactions are routinely mapped using high-throughput chromatin immunoprecipitation (ChIP). ChIP-reported regions are typically investigated for enriched sequence-motifs, which are likely to model the DNA-binding specificity of the profiled protein and/or of co-occurring proteins. However, simple enrichment analyses can miss insights into the binding-activity of the protein. Note that ChIP reports regions making direct contact with the protein as well as those binding through intermediaries...
April 23, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29683884/visit-to-visit-blood-pressure-variation-is-associated-with-outcomes-in-a-u-shaped-fashion-in-patients-with-myocardial-infarction-complicated-with-systolic-dysfunction-and-or-heart-failure-findings-from-the-ephesus-and-optimaal-trials
#9
João Pedro Ferreira, Kévin Duarte, Bertram Pitt, Kenneth Dickstein, John J V McMurray, Faiez Zannad, Patrick Rossignol
BACKGROUND: Visit-to-visit office blood pressure variation (BPV) has prognostic implications independent from mean BP across several populations in the cardiovascular field. The association of BPV with outcomes in patients with myocardial infarction (MI) with systolic dysfunction and/or heart failure is yet to be determined. METHODS: Two independent cohorts were assessed: the EPHESUS and the OPTIMAAL trials with a total of more than 12 000 patients. The primary outcome was all-cause death...
April 21, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29683733/cep55-overexpression-causes-male-specific-sterility-in-mice-by-suppressing-foxo1-nuclear-retention-through-sustained-activation-of-pi3k-akt-signaling
#10
Debottam Sinha, Murugan Kalimutho, Josephine Bowles, Ai-Leen Chan, D Jo Merriner, Amanda L Bain, Jacinta L Simmons, Raimundo Freire, J Alejandro Lopez, Robin M Hobbs, Moira K O'Bryan, Kum Kum Khanna
Spermatogenesis is a dynamic process involving self-renewal and differentiation of spermatogonial stem cells, meiosis, and ultimately, the differentiation of haploid spermatids into sperm. Centrosomal protein (CEP)-55 is necessary for somatic cell abscission during cytokinesis. It facilitates equal segregation of cytoplasmic contents between daughter cells by recruiting endosomal sorting complex required for transport machinery (ESCRT) at the midbody. In germ cells, CEP55, in partnership with testes expressed-14 protein (TEX14), has also been shown to be an integral component of intercellular bridge before meiosis...
April 17, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29683428/a-tension-adhesion-feedback-loop-in-plant-epidermis
#11
Stéphane Verger, Yuchen Long, Arezki Boudaoud, Olivier Hamant
Mechanical forces have emerged as coordinating signals for most cell functions. Yet, because forces are invisible, mapping tensile stress patterns in tissues remains a major challenge in all kingdoms. Here we take advantage of the adhesion defects in the Arabidopsis mutant quasimodo1 (qua1) to deduce stress patterns in tissues. By reducing the water potential and epidermal tension in planta , we rescued the adhesion defects in qua1 , formally associating gaping and tensile stress patterns in the mutant. Using suboptimal water potential conditions, we revealed the relative contributions of shape- and growth-derived stress in prescribing maximal tension directions in aerial tissues...
April 23, 2018: ELife
https://www.readbyqxmd.com/read/29683404/agency-modulates-interactions-with-automation-technologies
#12
Kevin Le Goff, Arnaud Rey, Patrick Haggard, Olivier Oullier, Bruno Berberian
The increasing presence of automation between operators and automated systems tends to disrupt operators from action outcomes, leading them to leave the control loop. The theoretical framework of agency suggests that priming the operator about the system's upcoming behaviour could help restore an appropriate sense of control and increase user acceptance of what the system is doing. In a series of two experiments, we test whether providing information about what the system is about to do next leads to an increase in the level of user acceptance, concomitant with an increase in control and performance...
April 23, 2018: Ergonomics
https://www.readbyqxmd.com/read/29683111/a-new-karst-dwelling-bent-toed-gecko-squamata-gekkonidae-cyrtodactylus-from-xiangkhoang-province-northeastern-laos
#13
Roman A Nazarov, Olivier S G Pauwels, Evgeniy L Konstantinov, Anatoliy S Chulisov, Nikolai L Orlov, Poyarkov Jr
We describe a new karst-dwelling Cyrtodactylus from Ban Thathom, Xiangkhoang Province, northeastern Laos. The new species can be distinguished from other congeners by having four dark dorsal bands between limb insertions, a discontinuous nuchal loop, 10 precloacal pores in males or 10-12 precloacal pits (females) separated by a diastema from a series of enlarged femoral scales bearing 18 or 19 pores (male) or 8-10 pits (females) along each femur, 14-18 dorsal tubercle rows at midbody, no precloacal groove, 30-36 midbody scale rows across belly between ventrolateral skin folds, transversely enlarged subcaudal plates, and a maximal known snout-vent length of 75...
April 20, 2018: Zoological Research
https://www.readbyqxmd.com/read/29682811/upregulation-of-hypothalamic-arginine-vasopressin-by-peripherally-administered-furosemide-in-transgenic-rats-expressing-arginine-vasopressin-enhanced-green-fluorescent-protein
#14
Hiromichi Ueno, Mitsuhiro Yoshimura, Kentaro Tanaka, Haruki Nishimura, Kazuaki Nishimura, Satomi Sonoda, Yasuhito Motojima, Reiko Saito, Takashi Maruyama, Tetsu Miyamoto, Ryota Serino, Masahito Tamura, Tatsushi Onaka, Yutaka Otsuji, Yoichi Ueta
Furosemide, which is used worldwide as a diuretic agent, inhibits sodium reabsorption in the Henle's loop, resulting in diuresis and natriuresis. Arginine vasopressin (AVP) is synthesized in the supraoptic nucleus (SON), paraventricular nucleus (PVN), and suprachiasmatic nucleus (SCN) of the hypothalamus. The synthesis AVP in the magnocellular neurons of SON and PVN physiologically regulated by plasma osmolality and blood volume and contributed water homeostasis by increasing water reabsorption in the collecting duct...
April 22, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29682620/a-prospective-cohort-study-of-patient-reported-vomiting-retching-nausea-and-antiemetic-use-during-neoadjuvant-long-course-radiation-therapy-and-concurrent-5-fluorouracil-based-chemotherapy-for-rectal-adenocarcinoma
#15
Kristopher Dennis, Liang Zeng, Carlo De Angelis, Hans Chung, Natalie Coburn, Edward Chow, C Shun Wong
Background and purpose: Antiemetic guidelines suggest daily prophylaxis with a serotonin3 receptor antagonist (5-HT3 RA) as an option for patients receiving long-course neoadjuvant radiation therapy and concurrent 5-fluorouracil-based chemotherapy for rectal cancer, despite the risks that 5-HT3 RA-induced constipation may pose. We explored the incidence of patient-reported vomiting, retching, nausea and antiemetic intake among patients in this setting to determine if these risks are justified...
March 2018: Clinical and Translational Radiation Oncology
https://www.readbyqxmd.com/read/29682171/a-novel-occludin-targeting-monoclonal-antibody-prevents-hepatitis-c-virus-infection-in-vitro
#16
Ken Okai, Naoki Ichikawa-Tomikawa, Akira C Saito, Tetsuya Watabe, Kotaro Sugimoto, Daiki Fujita, Chikako Ono, Takasuke Fukuhara, Yoshiharu Matsuura, Hiromasa Ohira, Hideki Chiba
Since hepatitis C virus (HCV) is thought to enter into host hepatocytes using the same cellular pathways regardless of the genotypes, the host factors are promising targets to prevent and treat HCV infection. Human occludin (hOCLN) is one representative entry factor, and its second extracellular loop (EC2) contributes to the species selectivity of HCV-susceptibility. However, the exact function of hOCLN during HCV entry remains unknown, and no hOCLN-targeting antibodies or synthetic drugs that prevent and treat HCV infection have yet been developed...
March 30, 2018: Oncotarget
https://www.readbyqxmd.com/read/29682144/periodic-and-simultaneous-quantification-of-blood-viscosity-and-red-blood-cell-aggregation-using-a-microfluidic-platform-under-in-vitro-closed-loop-circulation
#17
Yang Jun Kang
To evaluate variations of blood circulating in closed loops, hemorheological properties including blood viscosity and red blood cells (RBCs) are quantitatively measured with independent in-vitro instruments after collecting blood from a closed loop. But, most previous methods require periodic blood collections which induce several problems such as geometric differences between the fluidic channel and the in-vitro method, hemodilution, storage time, and unspecific blood flow rates. To resolve these issues, in this study, blood viscosity and RBC aggregation of blood circulating within a closed loop are measured with a microfluidic platform periodically and simultaneously...
March 2018: Biomicrofluidics
https://www.readbyqxmd.com/read/29681951/lateral-flow-loop-mediated-isothermal-amplification-test-with-stem-primers-detection-of-cryptosporidium-species-in-kenyan-children-presenting-with-diarrhea
#18
Timothy S Mamba, Cecilia K Mbae, Johnson Kinyua, Erastus Mulinge, Gitonga Nkanata Mburugu, Zablon K Njiru
Background. Cryptosporidium is a protozoan parasite and a major cause of diarrhea in children and immunocompromised patients. Current diagnostic methods for cryptosporidiosis such as microscopy have low sensitivity while techniques such as PCR indicate higher sensitivity levels but are seldom used in developing countries due to their associated cost. A loop-mediated isothermal amplification (LAMP) technique, a method with shorter time to result and with equal or higher sensitivity compared to PCR, has been developed and applied in the detection of Cryptosporidium species...
2018: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29681756/repressed-expression-of-a-gene-for-a-basic-helix-loop-helix-protein-causes-a-white-flower-phenotype-in-carnation
#19
Akane Totsuka, Emi Okamoto, Taira Miyahara, Takanobu Kouno, Emilio A Cano, Nobuhiro Sasaki, Aiko Watanabe, Keisuke Tasaki, Masahiro Nishihara, Yoshihiro Ozeki
In a previous study, two genes responsible for white flower phenotypes in carnation were identified. These genes encoded enzymes involved in anthocyanin synthesis, namely, flavanone 3-hydroxylase (F3H) and dihydroflavonol 4-reductase (DFR), and showed reduced expression in the white flower phenotypes. Here, we identify another candidate gene for white phenotype in carnation flowers using an RNA-seq analysis followed by RT-PCR. This candidate gene encodes a transcriptional regulatory factor of the basic helix-loop-helix (bHLH) type...
January 2018: Breeding Science
https://www.readbyqxmd.com/read/29681752/molecular-aspects-of-flower-senescence-and-strategies-to-improve-flower-longevity
#20
REVIEW
Kenichi Shibuya
Flower longevity is one of the most important traits for ornamental plants. Ethylene plays a crucial role in flower senescence in some plant species. In several species that show ethylene-dependent flower senescence, genetic modification targeting genes for ethylene biosynthesis or signaling has improved flower longevity. Although little is known about regulatory mechanisms of petal senescence in flowers that show ethylene-independent senescence, a recent study of Japanese morning glory revealed that a NAC transcription factor, EPHEMERAL1 (EPH1), is a key regulator in ethylene-independent petal senescence...
January 2018: Breeding Science
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