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https://www.readbyqxmd.com/read/28732133/ionization-and-collision-induced-dissociation-of-steroid-bis-glucuronides
#1
Argitxu Esquivel, Xavier Matabosch, Aristotelis Kotronoulas, Georgina Balcells, Jesús Joglar, Rosa Ventura
Studies on steroid metabolism are of utmost importance to improve the detection capabilities of anabolic androgenic steroids (AAS) misuse in sports drug testing. In humans, glucuronoconjugates are the most abundant phase II metabolites of AAS. Bis-glucuronidation is a reaction where two separated functional groups on the same molecule are conjugated with glucuronic acid. These metabolites have not been studied in depth for steroids and could be interesting markers for doping control. The aim of the present work was to study the ionization and collision induced dissociation of steroid bis-glucuronides to be able to develop mass spectrometric analytical strategies for their detection in urine samples after AAS administration...
July 21, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28731049/composite-hemangioendothelioma-with-neuroendocrine-marker-expression-an-aggressive-variant
#2
Kyle D Perry, Alyaa Al-Lbraheemi, Brian P Rubin, Jin Jen, Hongzheng Ren, Jin Sung Jang, Asha Nair, Jaime Davila, Stefan Pambuccian, Andrew Horvai, William Sukov, Henry D Tazelaar, Andrew L Folpe
Aberrant expression of neuroendocrine markers is extremely rare in endothelial neoplasms, with only a single report describing three cases. Although originally classified as conventional angiosarcoma, further assessment of these tumors revealed a strikingly composite morphology composed of retiform and epithelioid elements reminiscent of composite hemangioendothelioma, a rare subtype of hemangioendothelioma. To further investigate these findings, available materials from 11 morphologically distinctive endothelial tumors showing neuroendocrine marker expression were retrieved from our archives...
July 21, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28730846/spectral-behavior-of-white-pigment-mixtures-using-reflectance-ultraviolet-fluorescence-spectroscopy-and-multispectral-imaging
#3
Lucilla Pronti, Anna Candida Felici, Matthieu Ménager, Cathy Vieillescazes, Mario Piacentini
Reflectance spectroscopy, ultraviolet (UV)-fluorescence spectroscopy, and multispectral imaging have been widely employed for pigment identification on paintings. From ancient times to the present, lead white, zinc white, and titanium white have been the most important white pigments used for paintings and they are used as pigment markers for dating a work of art. The spectral behavior of these pigments is reported in several scientific papers and websites, but those of their mixtures are quite unknown. We present a combined nondestructive approach for identifying mixtures of lead white, zinc white, and titanium white as powder and dispersed in two different binder media (egg yolk and linseed oil) by using reflectance spectroscopy, spectrofluorimetry, multispectral reflectance and UV-fluorescence imaging...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28730228/her-2%C3%A3-neu-expression-in-different-histological-subtypes-of-papillary-thyroid-carcinoma
#4
Delia Ciobanu Apostol, Irina Draga Căruntu, Ludmila Lozneanu, Elena Corina Andriescu, Simona Eliza Giuşcă
The identification and validation of new, complementary prognostic factors represents a challenging issue in thyroid pathology, opening the perspective of papillary thyroid carcinoma (PTC) stratification based on differences of aggressiveness at molecular level. Our study aims to analyze the HER-2÷neu expression in different subtypes of PTC and its relationship with the classical clinicopathological factors. We investigated 120 cases of sporadic PTC. The cases were selected based on the histological criteria reported to clinical course and prognosis and distributed in two different subgroups, namely low- and high-risk...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28728969/a-nanoporous-titanium-surface-promotes-the-maturation-of-focal-adhesions-and-the-formation-of-filopodia-with-distinctive-nanoscale-protrusions-by-osteogenic-cells
#5
Dainelys Guadarrama Bello, Aurélien Fouillen, Antonella Badia, Antonio Nanci
While topography is a key determinant of the cellular response to biomaterials the mechanisms implicated in the cell-surface interactions are complex and still not fully elucidated. In this context, we have examined the effect of nanoscale topography on the formation of filopodia, focal adhesions, and on gene expression of proteins associated with cell adhesion and sensing. Commercially pure titanium discs were treated for oxidative nanopatterning with a solution of H2SO4/H2O2 50:50 (v/v). Scanning electron microscopy and atomic force microscopy characterizations showed that this facile chemical treatment efficiently creates a unique nanoporous surface with a root-mean-square roughness of 11...
July 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28727022/triennial-growth-and-development-symposium-genetics-and-breeding-for-intramuscular-fat-and-oleic-acid-content-in-pigs
#6
J Estany, R Ros-Freixedes, M Tor, R N Pena
The intramuscular fat (IMF) and oleic acid (OL) content have been favorably related to pork quality and human health. This influences the purchasing behavior of consumers and, therefore, also shifts the attention of breeding companies toward whether these traits are included into the breeding goal of the lines producing for high-valued markets. Because IMF and OL are unfavorably associated with lean content, a key economic trait, the real challenge for the industry is not simply to increase IMF and OL, but rather to come up with the right trade-off between them and lean content...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726546/nanotopographic-influence-on-the-in-vitro-behavior-of-induced-pluripotent-stem-cells
#7
Ji-Yun Ko, Hyun-Jik Oh, Jimin Lee, Gun-Il Im
While the influence of nanotopography on stem cell behavior have been extensively investigated on adult stem cells, far fewer studies have investigated the interaction of induced pluripotent stem cells (iPSC) with various nanotopographical patterns. The purpose of this study was to identify nanopatterns that can influence the stemness and proliferation as well as the adhesive properties in iPSCs, and thereby explore the feasibility of applying these nano-features for regenerative medicine. Three kinds of nanopatterns were fabricated from polydimethylsiloxane (PDMS) membranes, irregular patterned membrane (IPM), groove patterned membrane (GPM), and post patterned membrane (PPM), in addition to flat patterned membrane (FPM) which did not have any nanotopographic features and was used as the control pattern...
July 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28726442/ptsd-and-autism-spectrum-disorder-co-morbidity-gaps-in-research-and-potential-shared-mechanisms
#8
Nirit Haruvi-Lamdan, Danny Horesh, Ofer Golan
BACKGROUND: While autism and trauma were often linked in psychoanalytic theory, very few scientific attempts have been made to explore the associations and comorbidity between the two. Instead, each area has grown separately, yielding large bodies of theoretical and clinical knowledge. THEORETICAL FRAMEWORK: In this article, we suggest several possible pathways that may link trauma and autism. First, autism spectrum disorder (ASD) may serve as a vulnerability marker for posttraumatic stress disorder (PTSD), specifically by increasing the risk for exposure to traumatic events...
July 20, 2017: Psychological Trauma: Theory, Research, Practice and Policy
https://www.readbyqxmd.com/read/28723348/central-serotonin-attenuates-lps-induced-systemic-inflammation
#9
Clarissa M D Mota, Caroline Rodrigues-Santos, Rodrigo A R Fernández, Ruither O G Carolino, José Antunes-Rodrigues, Janete A Anselmo-Franci, Luiz G S Branco
Serotonin (5-HT) is a neuromodulator involved in several central-mediated mechanisms, such as endocrine processes, behavior, and sleep. Dysfunction of the serotonergic system is mainly linked to psychiatric disorders, but emerging evidence suggests that immune system activation may also alter brain 5-HT signaling. However, whether central 5-HT modulates systemic inflammation (SI) remains unknown. For this purpose, male Wistar rats (280-350 g, 8-9 weeks) were submitted to the experimental protocols beginning between 9 and 10 AM with the performance of injections...
July 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28721991/angiogenesis-concept-in-odontogenic-keratocyst-a-comparative-study
#10
Donia Sadri, Fatemeh Shahsavari, Sareh Farhadi, Zahra Shahabi, Zahra Mehran
CONTEXT: Recent reports have indicated that angiogenesis possibly affects the biologic behavior of the lesions. AIM: Given the different clinical behaviors of odontogenic keratocyst (OKC), the present study was undertaken to evaluate the concept of angiogenesis in pathogenesis and clinical behavior of OKC. SETTING AND DESIGN: This experimental study was carried out on 22 and 24 samples of OKCs and dentigerous cysts (DCs), respectively. METHODS: Immunohistochemical staining was approached using CD34 and vascular endothelial growth factor (VEGF) antibodies...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28721539/-computational-neuroanatomy-and-microstructure-imaging-using-magnetic-resonance-imaging
#11
REVIEW
S Mohammadi, N Weiskopf
BACKGROUND: Current computational neuroanatomy focuses on morphological measurements of the brain using standard magnetic resonance imaging (MRI) techniques. In comparison quantitative MRI (qMRI) typically provides a better tissue contrast and also greatly improves the sensitivity and specificity with respect to the microstructural characteristics of tissue. OBJECTIVE: Current methodological developments in qMRI are presented, which go beyond morphology because this provides standardized measurements of the microstructure of the brain...
July 18, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28720887/olfactory-bulb-plasticity-ensures-proper-olfaction-after-severe-impairment-in-postnatal-neurogenesis
#12
D Díaz, R Muñoz-Castañeda, C Ávila-Zarza, J Carretero, J R Alonso, E Weruaga
The olfactory bulb (OB) neurons establish a complex network that ensures the correct processing of the olfactory inputs. Moreover, the OB presents a lifelong addition of new neurons into its existing circuitry. This neurogenesis is considered essential for the OB function. However, its functional impact on physiology and behavior is still unclear. Here, we investigate the mechanisms of OB plasticity that underlie bulbar physiology in relation to severe damage of neurogenesis. The neurogenesis of young mice was altered by ionizing radiation...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720479/interaction-between-prenatal-risk-and-infant-parasympathetic-and-sympathetic-stress-reactivity-predicts-early-aggression
#13
J Suurland, K B Van der Heijden, S C J Huijbregts, S H M Van Goozen, H Swaab
Nonreciprocal action of the parasympathetic (PNS) and sympathetic (SNS) nervous systems, increases susceptibility to emotional and behavioral problems in children exposed to adversity. Little is known about the PNS and SNS in interaction with early adversity during infancy. Yet this is when the physiological systems involved in emotion regulation are emerging and presumably most responsive to environmental influences. We examined whether parasympathetic respiratory sinus arrhythmia (RSA) and sympathetic pre-ejection period (PEP) response and recovery at six months, moderate the association between cumulative prenatal risk and physical aggression at 20 months (N=113)...
July 15, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28715867/therapeutic-impact-of-grape-leaves-polyphenols-on-certain-biochemical-and-neurological-markers-in-alcl3-induced-alzheimer-s-disease
#14
Ibrahim H Borai, Magda K Ezz, Maha Z Rizk, Hanan F Aly, Mahmoud El-Sherbiny, Azza A Matloub, Ghadha I Fouad
Alzheimer's disease (AD) is a grave and prevailing neurodegenerative disease, characterized by slow and progressive neurodegeneration in different brain regions. Aluminum (Al) is a potent and widely distributed neurotoxic metal, implicated in the neuropathogenesis of AD. This study aimed to evaluate the possible neurorestorative potential of Vitis vinifera Leaves Polyphenolic (VLP) extract in alleviating aluminum chloride (AlCl3)-induced neurotoxicity in male rats. AlCl3 neurotoxicity induced a significant decrease in brain/serum acetylcholine (ACh) contents and serum dopamine (DA) levels, along with a significant increment of brain/serum acetylcholinesterase (AChE) activities...
July 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28715717/reading-network-in-dyslexia-similar-yet-different
#15
Karen E Waldie, Anna J Wilson, Reece P Roberts, David Moreau
Dyslexia is a developmental disorder characterized by reading and phonological difficulties, yet important questions remain regarding its underlying neural correlates. In this study, we used partial least squares (PLS), a multivariate analytic technique, to investigate the neural networks used by dyslexics while performing a word-rhyming task. Although the overall reading network was largely similar in dyslexics and typical readers, it did not correlate with behavior in the same way in the two groups. In particular, there was a positive association between reading performance and both right superior temporal gyrus and bilateral insula activation in dyslexic readers but a negative correlation in typical readers...
July 15, 2017: Brain and Language
https://www.readbyqxmd.com/read/28715704/oxytocin-receptor-gene-polymorphisms-attachment-and-ptsd-results-from-the-national-health-and-resilience-in-veterans-study
#16
Lauren M Sippel, Shizhong Han, Laura E Watkins, Ilan Harpaz-Rotem, Steven M Southwick, John H Krystal, Miranda Olff, Richard Sherva, Lindsay A Farrer, Henry R Kranzler, Joel Gelernter, Robert H Pietrzak
The human oxytocin system is implicated in social behavior and stress recovery. Polymorphisms in the oxytocin receptor gene (OXTR) may interact with attachment style to predict stress-related psychopathology like posttraumatic stress disorder (PTSD). The objective of this study was to examine independent and interactive effects of the OXTR single nucleotide polymorphism (SNP) rs53576, which has been associated with stress reactivity, support-seeking, and PTSD in prior studies, and attachment style on risk for PTSD in a nationally representative sample of 2163 European-American (EA) U...
July 8, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28714768/macronutrient-composition-of-a-morning-meal-and-the-maintenance-of-attention-throughout-the-morning
#17
Tommy J Wilson, Michael J Gray, Jan-Willem Van Klinken, Melissa Kaczmarczyk, John J Foxe
BACKGROUND: At present, the impact of macronutrient composition and nutrient intake on sustained attention in adults is unclear, although some prior work suggests that nutritive interventions that engender slow, steady glucose availability support sustained attention after consumption. A separate line of evidence suggests that nutrient consumption may alter electroencephalographic markers of neurophysiological activity, including neural oscillations in the alpha-band (8-14 Hz), which are known to be richly interconnected with the allocation of attention...
July 17, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28713088/-pathogenic-factors-of-regulatory-mechanisms-of-organism-adaptation-to-conditions-with-a-high-level-of-psychoemotional-load
#18
Oksana V Gorsha, Vasily I Gorsha
INTRODUCTION: The urgency of the issue is determined by the value of the stress impact of environmental conditions on workers of the operator personnel contingent, because the deterioration of their health and well-being is a factor in dangerous situations. However, the search for early diagnostic markers forming diseases, with a view to their prevention, is still a challenge. The aim was to establish the most important (among studied) pathogenetic factors of status of regulatory mechanisms of adaptation of individuals with a high level of psychoemotional load that is conditional upon profession...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28711610/night-eating-among-veterans-with-obesity
#19
Lindsey M Dorflinger, Christopher B Ruser, Robin M Masheb
The obesity rate is higher among veterans than the general population, yet few studies have examined their eating behaviors, and none have examined the presence of night eating and related comorbidities. This study examines night eating syndrome (NES) among veterans seeking weight management treatment, and relationships between NES and weight, insomnia, disordered eating, and psychological variables. The sample consisted of 110 veterans referred to a weight management program at VA Connecticut Healthcare System...
July 12, 2017: Appetite
https://www.readbyqxmd.com/read/28710502/indicators-of-marine-pollution-in-the-north-pacific-ocean
#20
Tanya M Brown, Hideshige Takada
The complex nature of ocean pollution underscores the utility in identifying and characterizing a limited number of "indicators" that enables scientists and managers to track trends over space and time. This paper introduces a special issue on indicators of marine pollution in the North Pacific Ocean and builds on a scientific session that was held at the North Pacific Marine Science Organization. The special issue highlights studies using a variety of indicators to provide insight into the identification of legacy and emerging contaminants, the ranking of priority pollutants from various sources, and the effects of contaminants on ecosystem health in the North Pacific Ocean...
July 14, 2017: Archives of Environmental Contamination and Toxicology
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