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https://www.readbyqxmd.com/read/28520405/morphology-driven-control-of-metabolite-selectivity-using-nanostructure-initiator-mass-spectrometry
#1
Jian Gao, Katherine B Louie, Philipp Steinke, Benjamin P Bowen, Markus de Raad, Ronald N Zuckermann, Gary Siuzdak, Trent R Northen
Nanostructure-initiator mass spectrometry (NIMS) is a laser desorption/ionization analysis technique based on the vaporization of a nanostructure trapped liquid 'initiator' phase. Here we report an intriguing relationship between NIMS surface morphology and analyte selectivity. Scanning electron microscopy and spectroscopic ellipsometry were used to characterize the surface morphologies of a series of NIMS substrates generated by anodic electrochemical etching method. Mass spectrometry imaging was applied to compare NIMS sensitivity of these various surfaces towards the analysis of diverse analytes...
May 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28516109/serum-derived-bovine-immunoglobulin-as-novel-adjunct-in-complicated-clostridium-difficile-colitis-treatment
#2
Samson Ferm, Nims Varadi, Constantine Fisher, Ellen Gutkin
Clostridium difficile infection (CDI) is a well-known complication of antibiotic therapy. It is associated with significant morbidity, mortality, and cost in the hospital setting. The main symptoms include watery diarrhea, abdominal pain, and distension, but CDI can also present as toxic megacolon, bowel perforation with peritonitis, sepsis and renal failure. Therapy includes metronidazole and oral vancomycin, with rectal vancomycin and fecal transplant reserved for more complicated cases. Adjunctive treatments such as probiotics have been tried with mixed results...
2017: ACG Case Reports Journal
https://www.readbyqxmd.com/read/28502165/grape-seed-proanthocyanidin-inhibits-mucin-synthesis-and-viral-replication-by-suppression-of-ap-1-and-nf-%C3%AE%C2%BAb-via-p38-mapks-jnk-signaling-pathways-in-respiratory-syncytial-virus-infected-a549-cells
#3
Jin-Woo Lee, Young Il Kim, Chang-Nim Im, Sung Wan Kim, Su Jin Kim, Seoyeon Min, Yong Hoon Joo, Sung-Vin Yim, Namhyun Chung
Airway epithelial cells are often infected by respiratory syncytial virus (RSV), one of the most common causes of asthma, bronchiolitis, chronic obstructive pulmonary disease (COPD), and pneumonia. During the infection process, excessive mucins aggravate airway inflammation. However, the mechanism underlying RSV-induced airway hyperresponsiveness and inflammation is poorly understood. Furthermore, no reliable vaccines or drugs for antiviral therapy are available. In this study, the effect of the natural compound grape seed proanthocyanidin (GSP) on RSV-infected human airway epithelial cells A549 was evaluated...
May 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28492973/fast-therapeutic-hypothermia-prevents-post-cardiac-arrest-syndrome-through-cyclophilin-d-mediated-mitochondrial-permeability-transition-inhibition
#4
Vincent Jahandiez, Martin Cour, Thomas Bochaton, Maryline Abrial, Joseph Loufouat, Abdallah Gharib, Annie Varennes, Michel Ovize, Laurent Argaud
The opening of the mitochondrial permeability transition pore (PTP), which is regulated by the matrix protein cyclophilin D (CypD), plays a key role in the pathophysiology of post-cardiac arrest (CA) syndrome. We hypothesized that therapeutic hypothermia could prevent post-CA syndrome through a CypD-mediated PTP inhibition in both heart and brain. In addition, we investigated whether specific pharmacological PTP inhibition would confer additive protection to cooling. Adult male New Zealand White rabbits underwent 15 min of CA followed by 120 min of reperfusion...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28479022/lathyrol-and-epoxylathyrol-derivatives-modulation-of-cdr1p-and-mdr1p-drug-efflux-transporters-of-candida-albicans-in-saccharomyces-cerevisiae-model
#5
Andreia Mónico, Shweta Nim, Noélia Duarte, Manpreet Kaur Rawal, Rajendra Prasad, Attilio Di Pietro, Maria-José U Ferreira
Macrocyclic diterpenes were previously found to be able to modulate the efflux pump activity of Candida albicans multidrug transporters. Most of these compounds were jatrophanes, but only a few number of lathyrane-type diterpenes was evaluated. Therefore, the aim of this study was to evaluate the ability of nineteen structurally-related lathyrane diterpenes (1-19) to overcome the drug-efflux activity of Cdr1p and Mdr1p transporters of C. albicans, and get some insights on their structure-activity relationships...
April 16, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28470288/c-si-n-zno-based-flexible-solar-cells-with-silica-nanoparticles-as-a-light-trapping-metamaterial
#6
Arijit Bardhan Roy, Sonali Das, Avra Kundu, Chandan Banerjee, Nillohit Mukherjee
Herein, we report the fabrication of flexible solar cells based on a crystalline p-Si/n-ZnO heterostructure for the first time. An enhancement of ∼52% in the base efficiency was achieved by the application of spherical SiO2 nanoparticles as light trapping structures on the top. The use of ZnO not only offers a facile route of synthesis, but also provides an additional advantage of large band bending, leading to notable open circuit voltage and formation of an intermediate ultra-thin barrier layer of Zn2SiO4 for minimized carrier recombination...
May 4, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28467051/openmsi-arrayed-analysis-toolkit-analyzing-spatially-defined-samples-using-mass-spectrometry-imaging
#7
Markus de Raad, Tristan de Rond, Oliver Rübel, Jay D Keasling, Trent R Northen, Benjamin P Bowen
Mass spectrometry imaging (MSI) has primarily been applied in localizing biomolecules within biological matrices. Although well-suited, the application of MSI for comparing thousands of spatially defined spotted samples has been limited. One reason for this is a lack of suitable and accessible data processing tools for the analysis of large arrayed MSI sample sets. The OpenMSI Arrayed Analysis Toolkit (OMAAT), is a software package that addresses the challenges of analyzing spatially defined samples in MSI datasets...
May 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28466123/the-role-of-quantitative-estrogen-receptor-status-in-predicting-tumor-response-at-surgery-in-breast-cancer-patients-treated-with-neoadjuvant-chemotherapy
#8
REVIEW
Jacques Raphael, Sonal Gandhi, Nim Li, Fang-I Lu, Maureen Trudeau
PURPOSE: Estrogen receptor (ER) negative (-) breast cancer (BC) patients have better tumor response rates than ER-positive (+) patients after neoadjuvant chemotherapy (NCT). We conducted a retrospective review using the institutional database "Biomatrix" to assess the value of quantitative ER status in predicting tumor response at surgery and to identify potential predictors of survival outcomes. METHODS: Univariate followed by multivariable regression analyses were conducted to assess the association between quantitative ER and tumor response assessed as tumor size reduction and pathologic complete response (pCR)...
May 2, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28464917/assessing-the-quality-of-reports-about-randomized-controlled-trials-of-scalp-acupuncture-treatment-for-vascular-dementia
#9
Young-Nim You, Myung-Rae Cho, Ju-Hyung Park, Gwang-Cheon Park, Min-Yeong Song, Jin-Bong Choi, Chang-Su Na, Jae-Young Han, Jeong-Cheol Shin, Jae-Hong Kim
BACKGROUND: This study aimed to evaluate the quality of reports about randomized controlled trials (RCTs) of scalp acupuncture (SA) for the treatment of vascular dementia (VD). METHOD: A systematic search of reports published through to December 2015 was performed in eight databases. The quality of RCTs that used SA as an intervention for VD was evaluated based on the 2010 Consolidated Standards for Reporting of Trials (CONSORT) and 2010 Standards for Reporting Interventions in Controlled Trials of Acupuncture (STRICTA) guidelines...
May 2, 2017: Trials
https://www.readbyqxmd.com/read/28442223/diurnal-cortisol-after-early-institutional-care-age-matters
#10
Jessica E Flannery, Laurel J Gabard-Durnam, Mor Shapiro, Bonnie Goff, Christina Caldera, Jennifer Louie, Dylan G Gee, Eva H Telzer, Kathryn L Humphreys, Daniel S Lumian, Nim Tottenham
Several studies have shown that young children who have experienced early caregiving adversity (e.g. previously institutionalization (PI)) exhibit flattened diurnal cortisol slopes; however, less is known about how these patterns might differ between children and adolescents, since the transition between childhood and adolescence is a time of purported plasticity in the hypothalamic-pituitary-adrenal (HPA) axis. PI youth experience a massive improvement in caregiving environment once adopted into families; therefore we anticipated that a developmental increase in HPA axis plasticity during adolescence might additionally allow for an enhanced enrichment effect by the adoptive family...
March 21, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28439771/neurobiological-programming-of-early-life-stress-functional-development-of-amygdala-prefrontal-circuitry-and-vulnerability-for-stress-related-psychopathology
#11
Michelle R VanTieghem, Nim Tottenham
Early adverse experiences are associated with heighted vulnerability for stress-related psychopathology across the lifespan. While extensive work has investigated the effects of early adversity on neurobiology in adulthood, developmental approaches can provide further insight on the neurobiological mechanisms that link early experiences and long-term mental health outcomes. In the current review, we discuss the role of emotion regulation circuitry implicated in stress-related psychopathology from a developmental and transdiagnostic perspective...
April 25, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28435076/design-synthesis-biological-evaluation-and-molecular-modelling-of-2-2-aryloxyphenyl-1-4-dihydroisoquinolin-3-2h-ones-a-novel-class-of-tspo-ligands-modulating-amyloid-%C3%AE-induced-mptp-opening
#12
Ahmed Elkamhawy, Jung-Eun Park, Ahmed H E Hassan, Ae Nim Pae, Jiyoun Lee, Beoung-Geon Park, Sora Paik, Jimin Do, Jong-Hyun Park, Ki Duk Park, Bongjin Moon, Woo Kyu Park, Heeyeong Cho, Dae Young Jeong, Eun Joo Roh
Translocator protein (TSPO) is involved in modulating mitochondrial permeability transition pore (mPTP) opening/closure leading to either apoptotic cell death via opening of mPTP or cell protection mediated by mPTP blocking and hence intercepting mPTP induced apoptosis. Herein, 2-(2-aryloxyphenyl)-1,4-dihydroisoquinolin-3(2H)-one derivatives have been designed and synthesized as new modulators for amyloid-β-induced mPTP opening. Among all, compound 7c remarkably enhanced mPTP opening while compound 7e showed the highest mPTP blocking activity...
April 21, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28425814/verbal-short-term-memory-and-language-impairments-in-cantonese-speakers-after-stroke
#13
Diana Wai-Lam Ho, Anthony Pak-Hin Kong, Nim-Ting Koon
PURPOSE: The study examined the relationship between verbal short-term memory (STM) and language impairment in Cantonese speakers after stroke. It is hypothesised that Cantonese speakers with left-hemisphere (LH) stroke would perform worse than those with right hemisphere (RH) stroke and normal controls. Specific linguistic factors of Cantonese might affect results in the tasks. METHOD: Fifteen participants with LH stroke, 10 with RH stroke and 25 healthy controls were tested with auditory-verbal immediate serial recall (ISR) tasks and auditory linguistic tasks...
February 21, 2017: International Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/28415058/-a-case-of-arteriovenous-malformation-of-the-parotid-gland-associated-with-cowden-disease
#14
Kazuhiko Nishi, Satoshi Murai, Hisakazu Itami, Shinji Otsuka, Noboru Kusaka, Tsukasa Nishiura, Nobuhiko Kimura, Kotaro Ogihara
We report a rare case of arteriovenous malformation(AVM)of the parotid gland associated with Cowden disease successfully treated with preoperative embolization followed by surgical removal. A 39-year-old man with a history of Cowden disease presented with a pulsating and growing mass on his left lower jaw. Contrast-enhanced computed tomography(CT)and angiography revealed a high-flow AVM in the deep lobe of the left parotid gland. After intravascular embolization of the feeding arteries, surgery was performed using the NIM-response<sup>®</sup>3...
April 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28406448/development-of-a-new-high-sensitivity-2000-kg-mechanical-balance
#15
Jian Wang
Mass measurement of more than 500 kg on an electronic mass comparator has no better repeatability and linearity of measurement for meeting the calibration requirement of over class F1 weights from pharmacy and power generation plants. For this purpose, a new 2000 kg mechanical balance was developed by the National Institute of Metrology (NIM). The advantages of measurement of more than 500 kg on a new 2000 kg mechanical balance are introduced in the paper. In order to obtain high measurement uncertainty, four vertical forces of two sides of beam are measured and used as reference for adjustment of the beam position...
April 13, 2017: Sensors
https://www.readbyqxmd.com/read/28403207/biosecurity-messages-are-lost-in-translation-to-citizens-implications-for-devolving-management-to-citizens
#16
Marnie L Campbell, Dominic E P Bryant, Chad L Hewitt
The increasing focus of marine biosecurity agencies on transferring management responsibilities to citizens and industry begs the question whether devolved responsibility is a viable option for creating biosecurity outcomes. We examined recreational marine users' self-declared awareness of non-indigenous marine species (NIMS) at six locations in Tasmania, Australia and evaluated the accuracy of their awareness through recognition of four well-known NIMS with active awareness campaigns. We also investigated whether the activities of recreational marine users influence the accuracy of their NIMS recognition skills...
2017: PloS One
https://www.readbyqxmd.com/read/28401841/positive-valence-bias-and-parent-child-relationship-security-moderate-the-association-between-early-institutional-caregiving-and-internalizing-symptoms
#17
Michelle R Vantieghem, Laurel Gabard-Durnam, Bonnie Goff, Jessica Flannery, Kathryn L Humphreys, Eva H Telzer, Christina Caldera, Jennifer Y Louie, Mor Shapiro, Niall Bolger, Nim Tottenham
Institutional caregiving is associated with significant deviations from species-expected caregiving, altering the normative sequence of attachment formation and placing children at risk for long-term emotional difficulties. However, little is known about factors that can promote resilience following early institutional caregiving. In the current study, we investigated how adaptations in affective processing (i.e., positive valence bias) and family-level protective factors (i.e., secure parent-child relationships) moderate risk for internalizing symptoms in previously institutionalized (PI) youth...
May 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28396694/synthesis-of-umbelliferone-derivatives-in-escherichia-coli-and-their-biological-activities
#18
Luan Luong Chu, Ramesh Prasad Pandey, Haet Nim Lim, Hye Jin Jung, Nguyen Huy Thuan, Tae-Su Kim, Jae Kyung Sohng
BACKGROUND: Umbelliferone, also known as 7-hydroxycoumarin, is a phenolic metabolite found in many familiar plants. Its derivatives have been shown to have various pharmacological and chemo-preventive effects on human health. A uridine diphosphate glycosyltransferase YjiC from Bacillus licheniformis DSM 13, a cytochrome P450BM3 (CYP450 BM3) variant namely mutant 13 (M13) from Bacillus megaterium, and an O-methyltransferase from Streptomyces avermitilis (SaOMT2) were used for modifications of umbelliferone...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/28391774/exploring-the-sensitivity-of-the-personality-assessment-inventory-symptom-validity-tests-in-detecting-response-bias-in-a-mixed-neuropsychological-outpatient-sample
#19
Owen J Gaasedelen, Douglas M Whiteside, Michael Basso
OBJECTIVE: Few studies have evaluated the symptom validity tests (SVTs) within the Personality Assessment Inventory (PAI) in a neuropsychological assessment context. Accordingly, the present study explored the accuracy of PAI SVTs in identifying exaggerated cognitive dysfunction in a mixed sample of outpatients referred for neuropsychological assessment. METHOD: Participants who failed two or more Performance Validity Tests (PVTs) were classified as having exaggerated cognitive dysfunction (n = 49)...
April 10, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28387326/demonstration-of-a-three-dimensional-negative-index-medium-operated-at-multiple-angle-incidences-by-monolithic-metallic-hemispherical-shells
#20
Ting-Tso Yeh, Tsung-Yu Huang, Takuo Tanaka, Ta-Jen Yen
We design and construct a three-dimensional (3D) negative index medium (NIM) composed of gold hemispherical shells to supplant an integration of a split-ring resonator and a discrete plasmonic wire for both negative permeability and permittivity at THz gap. With the proposed highly symmetric gold hemispherical shells, the negative index is preserved at multiple incident angles ranging from 0° to 85° for both TE and TM waves, which is further evidenced by negative phase flows in animated field distributions and outweighs conventional fishnet structures with operating frequency shifts when varying incident angles...
April 7, 2017: Scientific Reports
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