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https://www.readbyqxmd.com/read/28545257/the-reactive-sulfur-species-concept-15-years-on
#1
REVIEW
Gregory I Giles, Muhammad Jawad Nasim, Wesam Ali, Claus Jacob
Fifteen years ago, in 2001, the concept of "Reactive Sulfur Species" or RSS was advocated as a working hypothesis. Since then various organic as well as inorganic RSS have attracted considerable interest and stimulated many new and often unexpected avenues in research and product development. During this time, it has become apparent that molecules with sulfur-containing functional groups are not just the passive "victims" of oxidative stress or simple conveyors of signals in cells, but can also be stressors in their own right, with pivotal roles in cellular function and homeostasis...
May 23, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28545111/northern-range-expansion-of-the-asian-tiger-mosquito-aedes-albopictus-analysis-of-mosquito-data-from-connecticut-usa
#2
Philip M Armstrong, Theodore G Andreadis, John J Shepard, Michael C Thomas
BACKGROUND: The Asian tiger mosquito (Aedes albopictus) is an invasive species and important arbovirus vector that was introduced into the U.S. in the 1980's where it continues to expand its range. Winter temperature is an important constraint to its northward expansion, with potential range limits located between the 0° and -5°C mean cold month isotherm. Connecticut is located within this climatic zone and therefore, Ae. albopictus was monitored statewide to assess its northern range expansion and to delineate where populations can stably persist...
May 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28545024/an-unusual-intragenic-promoter-of-piwil2-contributes-to-aberrant-activation-of-oncogenic-pl2l60
#3
Shan-Shan Liu, Ning Liu, Meng-Yao Liu, Lei Sun, Wu-Yan Xia, Hong-Min Lu, Yu-Jie Fu, Guo-Liang Yang, Juan-Jie Bo, Xiao-Xing Liu, Haizhong Feng, Hailong Wu, Lin-Feng Li, Jian-Xin Gao
PIWIL2-like (PL2L) protein 60 (PL2L60), a product of aberrantly activated PIWIL2 gene, is widely expressed in various types of tumors and may promote tumorigenesis. However, the mechanisms underlying the activation of expression of PL2L60 remain unknown. In this study, an intragenic promoter responsible for the activation of PL2L60 within the human PIWIL2 gene has been identified, cloned and characterized. The promoter of PL2L60 is located in the intron 10 of the host gene PIWIL2. Bioinformatic and mutagenic analysis reveals that this intragenic promoter within the sequence of 50 nucleotides contains two closely arranged cis-acting elements specific for the hepatic leukemia factor (HLF) in the positive strand and signal transducer and activator of transcription 3 (STAT3) in the negative strand...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28544597/metastasis-of-soft-tissue-sarcomas-in-lymph-node-a-cytomorphological-study
#4
Jahnavi Gandhi, Shailee Mehta, Trupti Patel, Amisha Gami, Majal Shah, Dhaval Jetly
BACKGROUND: Soft-tissue sarcoma (STS) rarely metastasizes to lymph node compared to carcinoma. Fine-needle aspiration cytology (FNAC) carries a pivotal role in diagnosis of metastatic tumor to lymph node. This study highlights the role of FNAC in diagnosis of STS metastasis to lymph node. METHOD: A retrospective study over a period by 4 years carried out. FNAC of enlarged lymph node was performed in patients with STS. Cytology smears were examined in conjunction with clinical details...
May 24, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28544563/enantiopure-cycloiridiated-complexes-bearing-a-pentahelicenic-n-heterocyclic-carbene-and-displaying-long-lived-circularly-polarized-phosphorescence
#5
Jeanne Crassous, Nora Hellou, Monika Srebro-Hooper, Ludovic Favereau, Francesco Zinna, Elsa Caytan, Loic Toupet, Vincent Dorcet, Marion Jean, Nicolas Vanthuyne, Gareth Williams, Lorenzo Di Bari, Jochen Autschbach
A fused pi-helical N-heterocyclic (NHC) system has been prepared and examined through its diastereoisomerically pure cycloiridiated complexes. The latter display light-green phosphorescence with i) unusually long lifetimes and ii) circular polarization that depends on both the helical-NHC P/M and the iridium delta/lambda stereochemistry. These unprecedented features are attributed to extended pi-conjugation within helical carbenic ligand and efficient helicene-NHC-Ir interaction.
May 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544434/strain-stiffening-hydrogels-through-self-assembly-and-covalent-fixation-of-semi-flexible-fibers
#6
Rint P Sijbesma, Marcos Fernandez-Castano Romera, Clément Guibert, Ilja K Voets, Cornelis Storm
Biomimetic, strain-stiffening materials are reported, made through self-assembly and covalent fixation of small building blocks to form fibrous hydrogels able to stiffen by an order of magnitude in response to applied stress. The gels consist of semi-flexible rodlike micelles of bisurea bolaamphiphiles with oligo(ethylene oxide) (EO) outer blocks and a polydiacetylene (PDA) backbone. The micelles are fibers composed of 9-10 ribbons. A gelation method based on Cu-catalyzed azide-alkyne cycloaddition (CuAAC) was developed that leads to strain-stiffening hydrogels with unusual yet universal linear and nonlinear stress-strain response...
May 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544368/catalytic-electrophilic-alkylation-of-p-quinones-via-a-redox-chain-reaction
#7
Xiao-Long Xu, Zhi Li
Allylation and benzylation of p-quinones is achieved by an unusual redox chain reaction. Mechanistic studies suggest that the trace existence of hydroquinone initiates a redox chain reaction that consists of a Lewis acid-catalyzed Friedel-Crafts alkylation and a subsequent redox equilibrium that regenerates hydroquinone. The electrophiles could be various allylic and benzylic esters. Addition of Hantzsch ester as initiator improves the efficiency of the reaction.
May 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544344/fed-and-fasted-administration-of-a-novel-extended-release-methylphenidate-orally-disintegrating-tablet-formulation-for-the-treatment-of-adhd
#8
Richard H Weisler, Jeffrey G Stark, Carolyn Sikes
Extended-release methylphenidate is a first-line treatment for attention-deficit/hyperactivity disorder. A methylphenidate extended-release orally disintegrating tablet (MPH XR-ODT) has recently been developed. Here we report an open-label, randomized, 2-period, 2-treatment crossover study to determine the effect of food on the bioavailability of a single 60-mg dose of MPH XR-ODT in healthy adults. Blood samples were collected predose through 36 hours postdose. Maximum plasma concentration (Cmax ), time to maximum plasma concentration (Tmax ), terminal elimination half-life (T1/2 ), overall systemic exposure (AUClast and AUCinf ), and partial areas under the concentration curve (AUC0-3 , AUC3-7 , and AUC7-12 ) were calculated...
May 25, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28544315/markovnikov-versus-anti-markovnikov-hydrophosphination-divergent-reactivity-using-an-iron-ii-%C3%AE-diketiminate-pre-catalyst
#9
Andrew King, Kimberley Gallagher, Mary F Mahon, Ruth L Webster
The ability to tune between different regioselectivities using a common pre-catalyst is an unusual yet highly desirable process. Herein, we report the use of an iron(II) pre-catalyst that can be used to synthesize vinyl phosphines in a Markovnikov selective manner in benzene, whereas a simple change to dichloromethane as the reaction solvent leads to the Z-selective anti-Markovnikov functionalization. Preliminary mechanistic that studies suggest Markovnikov selectivity is a radical mediated process whereas the anti-Markovnikov selectivity is not radical in nature, and is due to a change in oxidation state, are reported...
May 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28543922/molluscum-contagiosum-of-the-gluteal-cleft-observations-and-implications-for-management-in-five-children
#10
Joshua R Bakke, Sarah L Stein
Molluscum contagiosum (MC) is a common, self-limited skin infection caused by a double-stranded DNA virus of the family Poxviridae. Although the morphology of the disease is well described, MC presenting at unusual sites can exhibit atypical morphology, resulting in misdiagnosis. This observational, retrospective case series discusses the novel morphology of MC presenting in the intergluteal cleft of five children seen in the outpatient dermatology clinic of an academic medical center. We present this case series to highlight this novel presentation of MC in children and to emphasize a conservative approach to management given the sensitive location and the self-limited nature of the infection...
May 25, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28543790/are-heart-rate-monitors-valuable-tools-for-diagnosing-arrhythmias-in-endurance-athletes
#11
Robert Gajda, Elżbieta Katarzyna Biernacka, Wojciech Drygas
Millions of physically active individuals worldwide use heart rate monitors (HRMs) to control their exercise intensity. In many cases, the HRM indicates an unusually high heart rate (HR) or even arrhythmias during training. Unfortunately, studies assessing the reliability of these devices to help control HR disturbances during exercise do not exist. We examined 142 regularly training endurance runners and cyclists, aged 18-51, with unexplained HR abnormalities indicated by various HRMs to assess the utility of HRMs in diagnosing exertion-induced arrhythmias...
May 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28543682/residual-thymic-tissue-and-lymph-node-involvement-by-acute-myeloid-leukaemia-presenting-as-mediastinal-strongly-18-fdg-pet-positive-masses
#12
Georg Maschmeyer, Ingo Brink, Doris Jähne, Renate Arnold, Olaf Schega
We report on a multidisciplinary management of a 68-year old AML patient presenting with a PET-positive mediastinal tumour typical for lymph node metastasis. It was removed via minimally invasive thoracoscopic intervention and was identified as a thymus residual infiltrated by AML. Follow-up PET-CT scan after resection and remission induction chemotherapy was completely normal. To our knowledge, this is the first documented case report of AML presenting with PET-positive infiltrates of thymic and lymph node tissue along the aortic bow mimicking a second intrathoracic malignancy...
May 22, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28543667/panchromatic-osmium-complexes-for-photodynamic-therapy-solutions-to-existing-problems-and-new-questions
#13
Edith C Glazer
This article is a highlight of the paper by Lazic et al. in this issue of Photochemistry and Photobiology. It describes the validation of osmium coordination complexes as photosensitizers for photodynamic therapy, with very promising in vivo results that demonstrate radical improvements in survival following irradiation with visible (635 nm) or near-IR (NIR; 808 nm) light. An unusual feature in the study is that the different complexes exhibit disparate photophysical and photobiological characteristics, despite sharing common structural motifs...
May 23, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28543379/idiopathic-lymphoplasmacellular-mucositis-of-the-lips-a-case-report-and-review-of-the-literature
#14
Ren-Feng Liu, Chun-Bing Chen, Tseng-Tong Kuo, Wen-Hung Chung
Idiopathic lymphoplasmacellular mucositis (ILPM) is a group of disorders histologically characterized by dense infiltrates of lymphocytes and plasma cells in submucosa. These lesions are initially observed on the glans penis and vulva, and later on buccal mucosa, lips, gingiva, tongue, epiglottis, larynx, and other mucosal surfaces have also been reported. We have reviewed the previously reported cases of ILPM with lip involvement, outlining the clinical presentation, treatment and outcome of the entity to date...
May 23, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28542920/relating-quantitative-variation-within-a-behavior-to-variation-in-transcription
#15
Kyle M Benowitz, Elizabeth C McKinney, Christopher B Cunningham, Allen J Moore
Many studies have shown that variation in transcription is associated with changes in behavioral state, or with variation within a state, but little has been done to address if the same genes are involved in both. Here we investigate the transcriptional basis of variation in parental provisioning using two species of burying beetle, Nicrophorus orbicollis and Nicrophorus vespilloides. We used RNA-seq to compare transcription in parents that provided high amounts of provisioning behavior versus low amounts in males and females of each species...
May 23, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28542839/how-whales-used-to-filter-exceptionally-preserved-baleen-in-a-miocene-cetotheriid
#16
Felix G Marx, Alberto Collareta, Anna Gioncada, Klaas Post, Olivier Lambert, Elena Bonaccorsi, Mario Urbina, Giovanni Bianucci
Baleen is a comb-like structure that enables mysticete whales to bulk feed on vast quantities of small prey, and ultimately allowed them to become the largest animals on Earth. Because baleen rarely fossilises, extremely little is known about its evolution, structure and function outside the living families. Here we describe, for the first time, the exceptionally preserved baleen apparatus of an entirely extinct mysticete morphotype: the Late Miocene cetotheriid, Piscobalaena nana, from the Pisco Formation of Peru...
May 24, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28542662/-dengue-with-unusual-clinical-features-in-an-infant-case-report
#17
Nina Méndez-Domínguez, Kikey Achach-Medina, Yareni María Morales-Gual, Salvador Gómez-Carro
The state of Yucatan, in Mexico, is an endemic area for dengue. During 2015, there was an unpredicted increase in the number of expected cases of dengue fever. OBJECTIVE: To describe and analyse the clinical presentation, progress, and management of a case of dengue infection with non-specific clinical manifestations in an infant which resulted in a dengue shock syndrome. CASE REPORT: One month old infant admitted to hospital with a generalised rash and a history of being bitten by an insect...
April 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28542417/interim-estimates-of-the-effectiveness-of-the-influenza-vaccine-against-a-h3n2-influenza-in-adults-in-south-korea-2016-2017-season
#18
Ji Yun Noh, Sooyeon Lim, Joon Young Song, Won Suk Choi, Hye Won Jeong, Jung Yeon Heo, Jacob Lee, Yu Bin Seo, Jin-Soo Lee, Seong Heon Wie, Young Keun Kim, Kyung Hwa Park, Sook-In Jung, Shin Woo Kim, Sun Hee Lee, Han Sol Lee, Young Hoon Yoon, Hee Jin Cheong, Woo Joo Kim
In the 2016-2017 season, the A(H3N2) influenza epidemic presented an unusual early peak pattern compared with past seasons in South Korea. The interim vaccine effectiveness (VE) of influenza vaccination in preventing laboratory-confirmed influenza was estimated using test-negative design through the tertiary hospital-based influenza surveillance system in South Korea. From 1 September, 2016 to 7 January, 2017, adjusted VE of influenza vaccination in preventing laboratory-confirmed A(H3N2) was -52.1% (95% confidence interval [CI], -147...
2017: PloS One
https://www.readbyqxmd.com/read/28542204/similar-regulatory-mechanisms-of-caveolins-and-cavins-by-myocardin-family-coactivators-in-arterial-and-bladder-smooth-muscle
#19
Baoyi Zhu, Catarina Rippe, Tran Thi Hien, Jianwen Zeng, Sebastian Albinsson, Karin G Stenkula, Bengt Uvelius, Karl Swärd
Caveolae are membrane invaginations present at high densities in muscle and fat. Recent work has demonstrated that myocardin family coactivators (MYOCD, MKL1), which are important for contractile differentiation and cell motility, increase caveolin (CAV1, CAV2, CAV3) and cavin (CAVIN1, CAVIN2, CAVIN3) transcription, but several aspects of this control mechanism remain to be investigated. Here, using promoter reporter assays we found that both MKL1/MRTF-A and MKL2/MRTF-B control caveolins and cavins via their proximal promoter sequences...
2017: PloS One
https://www.readbyqxmd.com/read/28542049/hitting-the-nail-on-the-head-a-case-report-demonstrating-the-importance-of-a-multidisciplinary-approach-to-an-unusual-penetrating-intracranial-injury
#20
Allison L Thoeny, Iman A Hadaya, Benn M Lancman, Vincent Lew
A 28-year-old man presented with a penetrating injury by a nail gun to the head. Imaging revealed a nail abutting the superior sagittal sinus without active extravasation. An anesthesia-led multidisciplinary team devised a detailed perioperative plan including conception of a complex decision tree, coordination of care, and resource utilization. In the operating room, the nail was removed under general anesthesia, with blood products and equipment for craniotomy readily available, and imaging modalities reserved for immediate use...
May 23, 2017: A & A Case Reports
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