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https://www.readbyqxmd.com/read/29334374/transitory-presence-of-myeloid-derived-suppressor-cells-in-neonates-is-critical-for-control-of-inflammation
#1
Yu-Mei He, Xing Li, Michela Perego, Yulia Nefedova, Andrew V Kossenkov, Erik A Jensen, Valerian Kagan, Yu-Feng Liu, Shu-Yu Fu, Qing-Jian Ye, Yan-Hong Zhou, Lai Wei, Dmitry I Gabrilovich, Jie Zhou
Myeloid-derived suppressor cells (MDSCs) are pathologically activated and relatively immature myeloid cells that have been implicated in the immunological regulation of many pathologic conditions. Phenotypically and morphologically, MDSCs are similar to neutrophils (PMN-MDSCs) and monocytes (M-MDSCs). However, they have potent suppressive activity and distinct gene expression profiles and biochemical characteristics. No or very few MDSCs are observed in steady-state physiological conditions. Therefore, until recently, accumulation of MDSCs was considered a consequence of pathological processes or pregnancy...
January 15, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29333381/changes-in-drosophila-melanogaster-sleep-wake-behavior-due-to-lotus-nelumbo-nucifera-seed-and-hwang-jeong-polygonatum-sibiricum-extracts
#2
Kyungae Jo, SangDuk Jeon, Chang-Won Ahn, Sung Hee Han, Hyung Joo Suh
We evaluated the sleep enhancement activity of the medicinal herbs valerian (Valeriana officinalis), jujube (Ziziphus jujube), lotus seed (Nelumbo nucifera), Gastrodia elata, Polygonatum sibiricum, and baekbokryung (Poria cocos), which can relieve insomnia in a Drosophila model. Locomotor activity was measured in the Drosophila model to evaluate the sleep activity of Korean medicinal herbs traditionally used as sleep aids. The group treated with lotus seed extract showed less nocturnal activity. Treatment with 10 or 20 mg/mL of P...
December 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29317202/structural-characterization-of-cardiolipin-driven-activation-of-cytochrome-c-into-a-peroxidase-and-membrane-perturbation
#3
Dariush Mohammadyani, Naveena Yanamala, Alejandro K Samhan Arias, Alexander A Kapralov, German Stepanov, Nick Nuar, Joan Planas-Iglesias, Narinder Sanghera, Valerian E Kagan, Judith Klein-Seetharaman
The interaction between CL and cytochrome c (cyt-c), results in a gain of function of peroxidase activity by cyt-c. Despite intensive research, disagreements on nature and molecular details of this interaction remain. In particular, it is still not known how the interaction triggers the onset of apoptosis. Enzymatic characterization of peroxidase activity has highlighted the need for a critical threshold concentration of CL, a finding of profound physiological relevance in vivo. Using solution NMR, fluorescence spectroscopy, and in silico modeling approaches we here confirm that full binding of cyt-c to the membrane requires a CL:cyt-c threshold ratio of 5:1...
January 6, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29288612/postintubation-tracheoesophageal-fistula-diagnosis-treatment-and-prognosis
#4
Ciprian Bolca, Valerian Păvăloiu, Georgiana Fotache, Mihai Dumitrescu, Andrei Bobocea, Mihai Alexe, Genoveva Cadar, Radu Stoica, Cristian Paleru, Ioan Cordoş
Introduction: Postintubation tracheoesophageal fistula is a severe complication occurring under certain conditions in patients that require prolonged mechanical ventilation. MATERIAL AND METHODS: This article focuses on a sample of 11 patients with postintubation tracheoesophageal fistula, operated in our department between 2005 and 2015. The anterior approach with tracheal resection was performed in 10 of these patients, while an atypical surgical technique was preferred in a case involving a large-sized fistula...
November 2017: Chirurgia
https://www.readbyqxmd.com/read/29250949/dissecting-the-gold-i-catalyzed-carboaminations-of-n-allyl-tetrahydro-%C3%AE-carbolines-to-allenes
#5
Valérian Gobé, Maxime Dousset, Pascal Retailleau, Vincent Gandon, Xavier Guinchard
N-Allyl tetrahydro-β-carbolines undergo gold-catalyzed cyclizations that lead to tetracyclic compounds, resulting from both ring closure and the transfer of the allylic group from the nitrogen to the carbon backbone. The final skeleton obtained depends on the nature of both the R2 group of the allene and the R3 group of the allylic residue. Mechanistic studies and DFT calculations allowed the determination of all the mechanistic pathways involved in these processes, stemming from a common intermediate that evolves differently according to the substituents nature...
December 18, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29242535/lipid-bodies-containing-oxidatively-truncated-lipids-block-antigen-cross-presentation-by-dendritic-cells-in-cancer
#6
Filippo Veglia, Vladimir A Tyurin, Dariush Mohammadyani, Maria Blasi, Elizabeth K Duperret, Laxminarasimha Donthireddy, Ayumi Hashimoto, Alexandr Kapralov, Andrew Amoscato, Roberto Angelini, Sima Patel, Kevin Alicea-Torres, David Weiner, Maureen E Murphy, Judith Klein-Seetharaman, Esteban Celis, Valerian E Kagan, Dmitry I Gabrilovich
Cross-presentation is a critical function of dendritic cells (DCs) required for induction of antitumor immune responses and success of cancer immunotherapy. It is established that tumor-associated DCs are defective in their ability to cross-present antigens. However, the mechanisms driving these defects are still unknown. We find that impaired cross-presentation in DCs is largely associated with defect in trafficking of peptide-MHC class I (pMHC) complexes to the cell surface. DCs in tumor-bearing hosts accumulate lipid bodies (LB) containing electrophilic oxidatively truncated (ox-tr) lipids...
December 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29232391/studies-of-the-structure-antioxidant-activity-relationships-and-antioxidant-activity-mechanism-of-iridoid-valepotriates-and-their-degradation-products
#7
Feifei Wang, Yumei Zhang, Shouhai Wu, Yi He, Zhong Dai, Shuangcheng Ma, Bin Liu
Oxidative stress has been associated with diverse diseases, including obesity, cancer and neurodegeneration. In fact, Valeriana jatamansi Jones (valerian) and its extracts possess strong antioxidant activities that extend their application in clinical practice to the treatment of these illnesses, even though the underlying mechanisms are not well understood. Iridoid valepotriate, a characteristic iridoid ester in valerian with poor chemical stability, possesses considerable antioxidant components. The original compounds and their degradation products have been found to exhibit strong antioxidant activities...
2017: PloS One
https://www.readbyqxmd.com/read/29197230/the-influence-of-prior-reputation-and-reciprocity-on-dynamic-trust-building-in-adults-with-and-without-autism-spectrum-disorder
#8
Cornelius Maurer, Valerian Chambon, Sacha Bourgeois-Gironde, Marion Leboyer, Tiziana Zalla
The present study was designed to investigate the effects of reputational priors and direct reciprocity on the dynamics of trust building in adults with (N = 17) and without (N = 25) autism spectrum disorder (ASD) using a multi-round Trust Game (MTG). On each round, participants, who played as investors, were required to maximize their benefits by updating their prior expectations (the partner's positive or negative reputation), based on the partner's directed reciprocity, and adjusting their own investment decisions accordingly...
November 29, 2017: Cognition
https://www.readbyqxmd.com/read/29186448/hepatitis-e-virus-seroprevalence-and-correlates-of-anti-hev-igg-antibodies-in-the-rakai-district-uganda
#9
Denali Boon, Andrew D Redd, Oliver Layendecker, Ronald Engle, Hanh Nguyen, Ponsiano Ocama, Iga Boaz, Anthony Ndyanabo, Valerian Kiggundu, Steven J Reynolds, Ronald H Gray, Maria Wawer, Robert H Purcell, Gregory D Kirk, Thomas C Quinn, Lara Stabinski
A cross-sectional study was conducted of 500 HIV-infected adults frequency matched on age, sex, and community to 500 HIV-uninfected individuals in the Rakai District, Uganda to evaluate seroprevalence of anti-hepatitis E virus (HEV) IgG antibodies. HEV seroprevalence was 47%, and one individual was actively infected with a genotype 3 virus. Using modified Poisson regression, male sex (PRR=1.247 [95%CI: 1.071-1.450]) and chronic HBV infection (PRR=1.377 [95%CI: 1.090-1.738]) were associated with HEV seroprevalence...
November 23, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29169731/a-composition-of-medicinal-plants-with-an-enhanced-ability-to-suppress-microsomal-lipid-peroxidation-and-a-protective-activity-against-carbon-tetrachloride-induced-hepatotoxicity
#10
Araylim N Aralbaeva, Aigul T Mamataeva, Nazgul I Zhaparkulova, Raisa S Utegalieva, Marina Khanin, Michael Danilenko, Maira K Murzakhmetova
Treatment of liver injury induced by various toxicants represents a serious clinical challenge. Here, we utilized the ability of natural agents to inhibit microsomal lipid peroxidation (LPO) as the in-vitro screening paradigm for selecting efficacious tissue-protective combinations of cooperatively acting medicinal plants. Based on screening of 70 water-ethanol extracts obtained from different parts of 65 plants we prepared a highly active phytocomposition (PC-1) containing oregano (Origanum vulgare), wild thyme (Thymus serpyllum) and coltsfoot (Tussilago farfara) aerial parts, valerian (Valeriana officinalis) leaves and little-leaf linden (Tilia cordata) flowers...
November 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29168225/gaba-modulating-phytomedicines-for-anxiety-a-systematic-review-of-preclinical-and-clinical-evidence
#11
REVIEW
Karen Savage, Joseph Firth, Con Stough, Jerome Sarris
Anxiety disorders are chronic and functionally disabling conditions with high psychological stress, characterised by cognitive symptoms of excessive worry and focus difficulties and physiological symptoms such as muscle tension and insomnia. Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter within the central nervous system and is a key target of pharmacotherapies in the treatment of anxiety. Although current pharmaceutical treatments are often efficacious, they may cause undesirable side effects including cognitive decrements and withdrawal symptoms...
November 23, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29161262/the-value-of-confirmatory-testing-in-early-infant-hiv-diagnosis-programmes-in-south-africa-a-cost-effectiveness-analysis
#12
Lorna Dunning, Jordan A Francke, Divya Mallampati, Rachel L MacLean, Martina Penazzato, Taige Hou, Landon Myer, Elaine J Abrams, Rochelle P Walensky, Valériane Leroy, Kenneth A Freedberg, Andrea Ciaranello
BACKGROUND: The specificity of nucleic acid amplification tests (NAATs) used for early infant diagnosis (EID) of HIV infection is <100%, leading some HIV-uninfected infants to be incorrectly identified as HIV-infected. The World Health Organization recommends that infants undergo a second NAAT to confirm any positive test result, but implementation is limited. Our objective was to determine the impact and cost-effectiveness of confirmatory HIV testing for EID programmes in South Africa...
November 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29151791/modern-lymphatic-dissection-techniques-for-preventing-post-renal-transplant-lymphocele
#13
Ciprian Valerian Lucan, Ionut Jurchis, Mihai Suciu, Sonia Emilia Selicean, Salvatore Buttice
Background and aims: Development of a lymphocele is a well-known complication following kidney transplant. Among causative factors, recipient iliac lymphatics dissection plays an important role. Electrothermal bipolar sealing devices (LigaSureTM) have been shown to decrease lymphatic leakage in a number of instances. The aim of this study was to investigate whether the use of this device decreases post-operative lymphatic complications in kidney transplant. Methods: 48 patients admitted for renal transplant were included in the study...
2017: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29140165/improved-total-body-irradiation-survival-by-delivery-of-two-radiation-mitigators-that-target-distinct-cell-death-pathways
#14
Justin Steinman, Michael Epperly, Wen Hou, John Willis, Hong Wang, Renee Fisher, Bing Liu, Ivet Bahar, Travis McCaw, Valerian Kagan, Hulya Bayir, Jian Yu, Peter Wipf, Song Li, M Saiful Huq, Joel S Greenberger
The acute lethality of total-body irradiation (TBI) involves damage to multiple organs, including bone marrow and intestine. Ionizing radiation mitigators that are effective when delivered 24 h or later after TBI include the anti-apoptotic drug, JP4-039 and the anti-necroptotic drug, necrostatin-1. In contrast to effective delivery of JP4-039 at 24 h after TBI, necrostatin-1 is most effective when delivery is delayed until 48 h, a time that correlates with the elevation of necroptosis-inducing inflammatory cytokines and necroptosis-induced serine phosphorylation of receptor-interacting serine/threonine-protein kinase-3 (RIP3) in tissues...
November 15, 2017: Radiation Research
https://www.readbyqxmd.com/read/29140132/mediation-of-the-single-walled-carbon-nanotubes-induced-pulmonary-fibrogenic-response-by-osteopontin-and-tgf-%C3%AE-1
#15
Timur O Khaliullin, Elena R Kisin, Ashley R Murray, Naveena Yanamala, Michael R Shurin, Dmitriy W Gutkin, Liliya M Fatkhutdinova, Valerian E Kagan, Anna A Shvedova
PURPOSE OF THE STUDY: A number of in vivo studies have shown that pulmonary exposure to carbon nanotubes (CNTs) may lead to an acute local inflammatory response, pulmonary fibrosis, and granulomatous lesions. Among the factors that play direct roles in initiation and progression of fibrotic processes are epithelial-mesenchymal transition and myofibroblasts recruitment/differentiation, both mediated by transforming growth factor-β1 (TGF-β1). Yet, other contributors to TGF-β1 associated signaling, such as osteopontin (OPN) has not been fully investigated...
October 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/29127985/le-dossier-m%C3%A3-dical-un-%C3%A3-l%C3%A3-ment-essentiel-de-tra%C3%A3-abilit%C3%A3
#16
Valériane Dujardin
No abstract text is available yet for this article.
November 2017: Revue de L'infirmière
https://www.readbyqxmd.com/read/29121679/quality-control-of-valerianae-radix-by-attenuated-total-reflection-fourier-transform-infrared-atr-ftir-spectroscopy
#17
Ramin Nikzad-Langerodi, Katharina Arth, Valerie Klatte-Asselmeyer, Sabine Bressler, Johannes Saukel, Gottfried Reznicek, Christoph Dobeš
(Acetoxy-)valerenic acid and total essential oil content are important quality attributes of pharmacy grade valerian root (Valerianae radix). Traditional analysis of these quantities is time-consuming and necessitates (harmful) solvents. Here we investigated an application of attenuated total reflection Fourier transform infrared spectroscopy for extractionless analysis of these quality attributes on a representative sample comprising 260 wild-crafted individuals covering the Central European taxonomic diversity of the Valeriana officinalis L...
November 9, 2017: Planta Medica
https://www.readbyqxmd.com/read/29103997/metagenomics-reshapes-the-concepts-of-rna-virus-evolution-by-revealing-extensive-horizontal-virus-transfer
#18
REVIEW
Valerian V Dolja, Eugene V Koonin
Virus metagenomics is a young research filed but it has already transformed our understanding of virus diversity and evolution, and illuminated at a new level the connections between virus evolution and the evolution and ecology of the hosts. In this review article, we examine the new picture of the evolution of RNA viruses, the dominant component of the eukaryotic virome, that is emerging from metagenomic data analysis. The major expansion of many groups of RNA viruses through metagenomics allowed the construction of substantially improved phylogenetic trees for the conserved virus genes, primarily, the RNA-dependent RNA polymerases (RdRp)...
November 8, 2017: Virus Research
https://www.readbyqxmd.com/read/29080082/impact-of-interhospital-transfer-on-outcomes-in-non-emergency-colorectal-surgery
#19
Stephen P Sharp, Daniel J Schuster, Ashar Ata, Brian T Valerian, Jonathan J Canete, A David Chismark, Edward C Lee
BACKGROUND: A paucity of data exists on the impact of transfer status on outcomes for patients undergoing non-emergency (urgent) colorectal surgery. This study characterized transferred patients undergoing urgent colorectal surgery and determined which patient comorbidities significantly contributed to poor outcomes. METHODS: The American College of Surgeons National Surgical Quality Improvement Program database from 2012 to 2013 was used. Urgent direct admissions undergoing colon, rectum, or small bowel operations were compared to urgent transfers using bivariate and multivariable analysis models...
October 27, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29078850/pulmonary-embolism-in-transit-before-pulseless-electrical-activity-arrest
#20
Lance D McLeroy, David D Daly, Jeremy D Rier, Chitra Lal, Valerian L Fernandes
No abstract text is available yet for this article.
October 2017: American Journal of the Medical Sciences
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