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https://www.readbyqxmd.com/read/28645380/comet-fish-for-ultrasensitive-strand-specific-detection-of-dna-damage-in-single-cells
#1
Manas Mondal, Jia Guo
The genome integrity of living organisms is constantly threatened by endogenous cellular metabolic processes and environmental agents. To quantify these low, physiologically relevant levels of DNA damage, a single-cell gel electrophoresis (comet) combined with strand-specific fluorescence in situ hybridization (FISH)-based approach has been developed. This approach enables the quantification of low levels of specific DNA lesions in each strand of the selected sequence at the single-molecule sensitivity, as well as in the genome overall in single cells...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28644708/the-arabidopsis-mind-mutation-causes-aberrant-ftsz1-ring-placement-and-moderate-heterogeneity-of-chloroplasts-in-the-leaf-epidermis
#2
Makoto T Fujiwara, Mana Yasuzawa, Shun Sasaki, Takeshi Nakano, Yasuo Niwa, Shigeo Yoshida, Tomoko Abe, Ryuuichi D Itoh
Symmetric division of leaf mesophyll chloroplasts requires MinD and MinE, which work together to suppress division other than at the mid-chloroplast. arc11 is a MinD loss-of-function mutant of Arabidopsis thaliana. In arc11 plants, asymmetric chloroplast division, as well as its delay or arrest, results in extreme size polymorphism of chloroplasts in mature mesophyll cells. The current study examined chloroplast phenotypes in the epidermis of arc11 leaves. Fluorescence microscopy analysis revealed that epidermal chloroplasts in mature leaves exhibited moderate heterogeneity in size...
June 23, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28644033/direct-indirect-nature-of-the-bandgap-in-lead-free-perovskite-nanocrystals
#3
Yuhai Zhang, Jun Yin, Manas R Parida, Ghada H Ahmed, Jun Pan, Osman M Bakr, Jean-Luc Bredas, Omar F Mohammed
With record efficiencies achieved in lead halide perovskite-based photovoltaics, urgency has shifted towards finding alternative materials that are stable and less-toxic. Bismuth-based perovskite materials are currently one of the most promising candidates amongst those alternatives. However, the band structures of these materials, including the nature of the bandgaps, remain elusive due to extremely low photoluminescence quantum yield (PLQY) and scattering issues in their thin-film or bulk form. Here, we overcome those limitations and reveal the specific nature of the material's electronic transitions by realizing monodisperse colloidal nanocrystals (NCs) of hexagonal-phase Cs3Bi2X9 perovskites, which afford well-resolved PL features...
June 23, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28639026/regulation-of-engineered-nanomaterials-current-challenges-insights-and-future-directions
#4
Racliffe W S Lai, Katie W Y Yeung, Mana M N Yung, Aleksandra B Djurišić, John P Giesy, Kenneth M Y Leung
Substantial production and wide applications of engineered nanomaterials (ENMs) have raised concerns over their potential influences on the environment and humans. However, regulations of products containing ENMs are scarce, even in countries with the greatest volume of ENMs produced, such as the United States and China. After a comprehensive review of life cycles of ENMs, five major challenges to regulators posed by ENMs are proposed in this review: (a) ENMs exhibit variable physicochemical characteristics, which makes them difficult for regulators to establish regulatory definition; (b) Due to diverse sources and transport pathways for ENMs, it is difficult to monitor or predict their fates in the environment; (c) There is a lack of reliable techniques for quantifying exposures to ENMs; (d) Because of diverse intrinsic properties of ENMs and dynamic environmental conditions, it is difficult to predict bioavailability of ENMs on wildlife and the environment; and (e) There are knowledge gaps in toxicity and toxic mechanisms of ENMs from which to predict their hazards...
June 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28638671/prenatal-diagnosis-of-atrioventricular-block-and-qt-interval-prolongation-by-fetal-magnetocardiography-in-a-fetus-with-trisomy-18-and-scn5a-r1193q-variant
#5
Lisheng Lin, Miho Takahashi-Igari, Yoshiaki Kato, Yoshihiro Nozaki, Mana Obata, Hiromi Hamada, Hitoshi Horigome
We report a case of fetal trisomy 18 with SCN5A R1193Q variant that presented with sinus bradycardia, 2 : 1 atrioventricular block (AVB), and QT interval prolongation. These complex arrhythmias were diagnosed by fetal magnetocardiography combined with ultrasound findings. Advanced AVB and ventricular arrhythmias were confirmed after birth. Genetic testing of the baby revealed a SCN5A R1193Q variant, which we considered could account for the various arrhythmias in this case.
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28638547/push-out-bond-strength-of-different-endodontic-obturation-material-at-three-different-sites-in-vitro-study
#6
Pankaj Mishra, Anjna Sharma, Sunil Mishra, Manas Gupta
BACKGROUND: The key to success of any root canal therapy is adequate obturation of the prepared root canal space. Root canal sealers are not dimensionally stable and might dissolve partially over a period of time. The objective of this in vitro study is to evaluate the push-out bond strength to intraradicular dentin of two endodontic obturation materials. MATERIAL AND METHODS: Forty extracted single rooted permanent teeth were used. Canals orifice was explored, teeth were instrumented...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28638312/in-silico-signature-prediction-modeling-in-cytolethal-distending-toxin-producing-escherichia-coli-strains
#7
Maryam Javadi, Mana Oloomi, Saeid Bouzari
In this study, cytolethal distending toxin (CDT) producer isolates genome were compared with genome of pathogenic and commensal Escherichia coli strains. Conserved genomic signatures among different types of CDT producer E. coli strains were assessed. It was shown that they could be used as biomarkers for research purposes and clinical diagnosis by polymerase chain reaction, or in vaccine development. cdt genes and several other genetic biomarkers were identified as signature sequences in CDT producer strains...
June 2017: Genomics & Informatics
https://www.readbyqxmd.com/read/28637844/a-dirty-cause-of-vancomycin-mediated-henoch-schonlein-purpura-oxygen-tubing-is-not-a-foley
#8
Nikhil H Shah, Kristopher P Kline, Manas K Shukla
A 59-year-old male presented with methicillin-resistantStaphylococcus aureus bacteraemia from a prostatic abscess and was treated with vancomycin. Two weeks into his treatment course, he developed severe joint pains, abdominal pain with bloody, mucinous stools and a diffuse palpable purpuric rash on his extremities. Biopsy of the rash showed IgA immune-complex deposition consistent with Henoch-Schönlein purpura. After treatment with glucocorticoids, his symptoms resolved completely. Vancomycin is an extremely commonly used antibiotic with certain well-known adverse effects...
June 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28623275/influences-of-temperature-and-salinity-on-physicochemical-properties-and-toxicity-of-zinc-oxide-nanoparticles-to-the-marine-diatom-thalassiosira-pseudonana
#9
Mana M N Yung, Kevin W H Kwok, Aleksandra B Djurišić, John P Giesy, Kenneth M Y Leung
Climate change is predicted to result in rising average temperature of seawater with more extreme thermal events, and frequent rainfalls in some coastal regions. It is imperative to understand how naturally mediated changes in temperature and salinity can modulate toxicity of chemical contaminants to marine life. Thus, this study investigated combined effects of temperature and salinity on toxicity of zinc oxide nanoparticles (ZnO-NPs) to the marine diatom Thalassiosira pseudonana. Because ZnO-NPs formed larger aggregations and released less zinc ions (Zn(2+)) at greater temperature and salinity, toxicity of ZnO-NPs to T...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623151/cognitive-performance-across-3-frailty-phenotypes-toledo-study-for-healthy-aging
#10
Cristina Rosado-Artalejo, Jose Antonio Carnicero, Jose Losa-Reyna, Amelia Guadalupe-Grau, Carmen Castillo-Gallego, Gonzalo Gutierrez-Avila, Ana Alfaro-Acha, Fernando Rodríguez-Artalejo, Leocadio Rodríguez-Mañas, Francisco José García-García
INTRODUCTION: Frailty is a strong predictor of adverse health events, but its impact on cognitive function is poorly understood. AIM: To assess cognitive performance in frailty and to identify the frailty stage where cognitive impairment begins. METHODS: Data were taken from 2044 people aged ≥65 years without cognitive impairment selected from the Toledo Study for Healthy Aging, a population-based cohort of older adults. Frailty status was assessed by 3 different scales: Frailty Phenotype (FP), Frailty Trait Scale (FTS), and Frailty Index (FI)...
June 13, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28621277/botulinum-toxin-for-the-treatment-of-gummv-smile
#11
Afnan F Al-Fouzan, Lamia S Mokeem, Reem T Al-Saqat, Maisa A Alfalah, Mana A Alharbi, Abdullah E Al-Samary
AIM: The aim was to evaluate the effect of botulinum toxin (Botox) injections as a conservative treatment for gummy smile. MATERIALS AND METHODS: An experimental in vivo study was conducted at a dermatology clinic in Riyadh in January 2016. The study included 23 female patients who ranged from 20 to 50 years and were treated with Botox injections due to excessive maxillary gingival display. The patients with short clinical crowns or long maxilla, those who were pregnant or breastfeeding, and patients with neuromuscular disorders were excluded...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28617439/cdc20-directs-proteasome-mediated-degradation-of-the-tumor-suppressor-smar1-in-higher-grades-of-cancer-through-the-anaphase-promoting-complex
#12
Debasish Paul, Suvankar Ghorai, U S Dinesh, Praveenkumar Shetty, Samit Chattopadhyay, Manas Kumar Santra
The Tumor suppressor SMAR1 (scaffold matrix attachment region binding protein 1) has a crucial role in maintaining genomic stability, cell cycle progression and apoptosis.Our previous finding showed that it is highly suppressed in higher grade of cancer. However, the underlying mechanism of this suppression was not well understood. In this study, we show that SMAR1 expression levels are controlled at the proteasomal level by five RING finger E3 ubiquitin ligases including, Cdc20, a substrate receptor of ubiquitin ligase APC/C complex...
June 15, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28613075/syntheses-of-tetrahydrobenzoazepinoindoles-and-dihydrobenzodiazepinoindoles-via-ring-opening-cyclization-of-activated-aziridines-with-2-2-bromophenyl-1h-indoles
#13
Sajan Pradhan, Chandan Kumar Shahi, Aditya Bhattacharyya, Navya Chauhan, Manas K Ghorai
Two efficient, modular, step- and pot-economic strategies to access various 5,6,7,12-tetrahydrobenzo[2,3]azepino[4,5-b]indoles and 6,7-dihydro-5H-benzo[5,6][1,4]diazepino[1,7-a]indoles are disclosed that advance via SN2-type regioselective ring opening of enantiopure aziridines with 2-(2-bromophenyl)-1H-indoles at their C3 and indolyl N centers, respectively, followed by Cu-mediated C-N cyclization which furnishes the products in excellent yields with outstanding enantiomeric excesses (up to >99%).
June 14, 2017: Organic Letters
https://www.readbyqxmd.com/read/28611437/reproductive-isolation-through-experimental-manipulation-of-sexually-antagonistic-coevolution-in-drosophila-melanogaster
#14
Zeeshan Ali Syed, Martik Chatterjee, Manas Arun Samant, Nagaraj Guru Prasad
Promiscuity can drive the evolution of sexual conflict before and after mating occurs. Post mating, the male ejaculate can selfishly manipulate female physiology, leading to a chemical arms race between the sexes. Theory suggests that drift and sexually antagonistic coevolution can cause allopatric populations to evolve different chemical interactions between the sexes, thereby leading to postmating reproductive barriers and speciation. There is, however, little empirical evidence supporting this form of speciation...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28610121/a-new-species-of-velvet-skate-i-notoraja-i-i-sereti-i-n-sp-rajiformes-arhynchobatidae-from-papua-new-guinea
#15
William T White, Peter R Last, Ralph R Mana
A new arhynchobatin skate, Notoraja sereti n. sp., is described based on three specimens collected from off Madang (Papua New Guinea) at depths of 800-980 m. This medium-size Notoraja skate shares with other velcro skates from the Western Pacific, N. alisae, N. fijiensis, N. inusitata and N. longiventralis, a ventral surface covering of fine denticles giving the skin a velvety feel. Notoraja sereti differs from all of these species in having a shorter snout (preorbital length 10.1-11.1 vs. 11.5-14.5% TL, prenasal length 8...
March 19, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610109/-i-etmopterus-i-i-samadiae-i-n-sp-a-new-lanternshark-squaliformes-etmopteridae-from-papua-new-guinea
#16
William T White, David A Ebert, Ralph R Mana, Shannon Corrigan
A new species of lanternshark, Etmopterus samadiae (Squaliformes: Etmopteridae), is described from off northern Papua New Guinea, in the western Central Pacific Ocean. The new species resembles other members of the "Etmopterus lucifer" clade in having linear rows of dermal denticles and most closely resembles E. brachyurus from the western North Pacific. The new species occurs along insular slopes between 340 and 785 m depth. The new species can be distinguished from other members of the E. lucifer clade by a combination of characteristics, including length of anterior flank branch markings being slightly shorter than its posterior branch, a longer caudal base marking, and irregular and variable number of black, horizontal, dash-like marks on sides of body...
March 20, 2017: Zootaxa
https://www.readbyqxmd.com/read/28607850/interpositional-lateral-thoracic-vein-graft-for-diep-flap-salvage-in-setting-of-superficial-venous-system-dominance
#17
Manas Nigam, Michael V DeFazio, Maurice Y Nahabedian
No abstract text is available yet for this article.
May 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28602428/influence-of-amalaki-rasayana-on-telomerase-activity-and-telomere-length-in-human-blood-mononuclear-cells
#18
Kanive P Guruprasad, Sweta Dash, Marigowda B Shivakumar, Pavithra R Shetty, Kothanahalli S Raghu, Bhanuvalli R Shamprasad, Vishwanatha Udupi, Raviraj V Acharya, Prasanna B Vidya, Jayakrishna Nayak, Anandan E Mana, Rajesh Moni, Muraleedharan T Sankaran, Kapaettu Satyamoorthy
BACKGROUND: Indian traditional medicine practices use defined rasayana preparations to improve the quality of health in aged individuals. Amalaki Rasayana is one such rasayana prepared from the fruits of Phyllanthus emblica and is popularly used to prevent or treat various age related health conditions. Telomerase activity in the cells maintains telomere length and is implicated in ageing and various diseases wherein the shortening of telomere during ageing is controlled chiefly by the telomerase activity...
June 8, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/28599703/cellular-neurothakeoma-in-a-relatively-rare-site
#19
Manas Bajpai, Nilesh Pardhe
No abstract text is available yet for this article.
May 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28595963/frailty-what-are-we-talking-about-implications-for-the-daily-clinical-practice
#20
Leocadio Rodríguez-Mañas, Jeremy D Walston
No abstract text is available yet for this article.
June 5, 2017: Revista Española de Geriatría y Gerontología
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