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https://www.readbyqxmd.com/read/29133345/small-rna-teg49-is-derived-from-a-sara-transcript-and-regulates-virulence-genes-independent-of-sara-in-staphylococcus-aureus
#1
Adhar C Manna, Samin Kim, Liviu Cengher, Anna Corvaglia, Stefano Leo, Patrice Francois, Ambrose L Cheung
Expression of virulence factors in S. aureus is regulated by a wide range of transcriptional regulators including proteins and small RNAs (sRNAs) at the level of transcription and/or translation. The sarA locus consists of three overlapping transcripts generated from three distinct promoters, all encoding the sarA ORF. The 5' UTRs of these transcripts contain three separate regions at ∼711, 409, and 146-nt upstream of the sarA translation start, the functions of which remain unknown. Recent RNA-Seq analysis and subsequent characterization indicated that two sRNA, teg49 and teg48, are processed and likely produced from the sarA P3 and sarA P1 transcripts of the sarA locus, respectively...
November 13, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29099133/sub-doppler-infrared-spectroscopy-of-resonance-stabilized-hydrocarbon-intermediates-%C3%AE-3-%C3%AE-4-ch-stretch-modes-and-ch2-internal-rotor-dynamics-of-benzyl-radical
#2
A Kortyna, A J Samin, T A Miller, D J Nesbitt
Highly reactive benzyl radicals are generated by electron dissociative attachment to benzyl chloride doped into a neon-hydrogen-helium discharge and immediately cooled to Trot = 15 K in a high density, supersonic slit expansion environment. The sub-Doppler spectra are fit to an asymmetric-top rotational Hamiltonian, thereby yielding spectroscopic constants for the ground (v = 0) and first excited (v = 1, ν3, ν4) vibrational levels of the ground electronic state. The rotational constants obtained for the ground state are in good agreement with previous laser induced fluorescence measurements (LIF), with vibrational band origins (ν3 = 3073...
November 3, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29097944/multimodal-imaging-nanoparticles-derived-from-hyaluronic-acid-for-integrated-preoperative-and-intraoperative-cancer-imaging
#3
William M Payne, Tanner K Hill, Denis Svechkarev, Megan B Holmes, Balasrinivasa R Sajja, Aaron M Mohs
Surgical resection remains the most promising treatment strategy for many types of cancer. Residual malignant tissue after surgery, a consequence in part due to positive margins, contributes to high mortality and disease recurrence. In this study, multimodal contrast agents for integrated preoperative magnetic resonance imaging (MRI) and intraoperative fluorescence image-guided surgery (FIGS) are developed. Self-assembled multimodal imaging nanoparticles (SAMINs) were developed as a mixed micelle formulation using amphiphilic HA polymers functionalized with either GdDTPA for T1 contrast-enhanced MRI or Cy7...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29097762/tuning-the-motility-and-directionality-of-self-propelled-colloids
#4
Juan Ruben Gomez-Solano, Sela Samin, Celia Lozano, Pablo Ruedas-Batuecas, René van Roij, Clemens Bechinger
Microorganisms are able to overcome the thermal randomness of their surroundings by harvesting energy to navigate in viscous fluid environments. In a similar manner, synthetic colloidal microswimmers are capable of mimicking complex biolocomotion by means of simple self-propulsion mechanisms. Although experimentally the speed of active particles can be controlled by e.g. self-generated chemical and thermal gradients, an in-situ change of swimming direction remains a challenge. In this work, we study self-propulsion of half-coated spherical colloids in critical binary mixtures and show that the coupling of local body forces, induced by laser illumination, and the wetting properties of the colloid, can be used to finely tune both the colloid's swimming speed and its directionality...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29069930/long-term-health-effects-of-chemical-warfare-agents-on-children-following-a-single-heavy-exposure
#5
J M Talabani, A I Ali, A M Kadir, R Rashid, F Samin, D Greenwood, Awm Hay
In the 1980s, villages in the Kurdistan region of Iraq were exposed to chemical weapons (CWs), which killed and injured thousands of civilians. There has been no clinical assessment of the long-term effects of CWs exposure on those injured. We report the first such evaluation of CW effects on long-term health of children. Patients from the CW-exposed areas were interviewed to assess previous and current clinical history and underwent clinical examination. The status of organs known to be targets of CWs, including skin, eyes, respiratory and neuromuscular systems, was assessed...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29045041/orbital-and-rotational-atherectomy-during-percutaneous-coronary-intervention-for-coronary-artery-calcification
#6
Michael S Lee, Jonathan S Gordin, Gregg W Stone, Samin K Sharma, Shigeru Saito, Ehtisham Mahmud, Jeff Chambers, Philippe Généreux, Richard Shlofmitz
Severe coronary artery calcification (CAC) increases the complexity of percutaneous coronary intervention (PCI) by inhibiting optimal stent expansion, leading to an increased risk of death, myocardial infarction, repeat revascularization, and stent thrombosis. Coronary atherectomy modifies and debulks calcified plaque to facilitate PCI. Although there is no clear consensus, and further studies are needed, the decision to perform atherectomy should be based upon the presence of fluoroscopic CAC or with the use of intravascular imaging...
October 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28945162/orbital-atherectomy-for-the-treatment-of-severely-calcified-coronary-lesions-evidence-technique-and-best-practices
#7
Evan Shlofmitz, Brad J Martinsen, Michael Lee, Sunil V Rao, Philippe Généreux, Joe Higgins, Jeffrey W Chambers, Ajay J Kirtane, Emmanouil S Brilakis, David E Kandzari, Samin K Sharma, Richard Shlofmitz
The presence of severe coronary artery calcification is associated with higher rates of angiographic complications during percutaneous coronary intervention (PCI), as well as higher major adverse cardiac events compared with non-calcified lesions. Incorporating orbital atherectomy (OAS) for effective preparation of severely calcified lesions can help maximize the benefits of PCI by attaining maximal luminal gain (or stent expansion) and improve long-term outcomes (by reducing need for revascularization). Areas covered: In this manuscript, the prevalence, risk factors, and impact of coronary artery calcification on PCI are reviewed...
October 4, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28924454/detection-of-enterotoxigenic-bacteroides-fragilis-in-patients-with-ulcerative-colitis
#8
Samin Zamani, Sonia Hesam Shariati, Mohammad Reza Zali, Hamid Asadzadeh Aghdaei, Akram Sarabi Asiabar, Saied Bokaie, Bizhan Nomanpour, Leonardo Antonio Sechi, Mohammad Mehdi Feizabadi
PURPOSE: Ulcerative colitis (UC) as a type of inflammatory bowel disease (IBD), presumed to occur as a consequence of increased immune responses to intestinal microbiota in genetically susceptible individuals. Enterotoxigenic Bacteroides fragilis (ETBF) strains are important intestinal bacteria that can be involved in IBD. The aim of this study was to design a quantitative assay for detection of B. fragilis and ETBF and also to find their association with UC. METHODS: Ninety-five biopsies were collected from patients with UC (n = 35) and with no IBD (nIBD, n = 60)...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28863535/dilution-effects-on-combined-magnetic-and-electric-dipole-interactions-a-study-of-ferromagnetic-cobalt-nanoparticles-with-tuneable-interactions
#9
M Hod, A Dobroserdova, S Samin, C Dobbrow, A M Schmidt, M Gottlieb, S Kantorovich
Improved understanding of complex interactions between nanoparticles will facilitate the control over the ensuing self-assembled structures. In this work, we consider the dynamic changes occurring upon dilution in the self-assembly of a system of ferromagnetic cobalt nanoparticles that combine magnetic, electric, and steric interactions. The systems examined here vary in the strength of the magnetic dipole interactions and the amount of point charges per particle. Scattering techniques are employed for the characterization of the self-assembly aggregates, and zeta-potential measurements are employed for the estimation of surface charges...
August 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28837622/lef1-dependent-hypothalamic-neurogenesis-inhibits-anxiety
#10
COMPARATIVE STUDY
Yuanyuan Xie, Dan Kaufmann, Matthew J Moulton, Samin Panahi, John A Gaynes, Harrison N Watters, Dingxi Zhou, Hai-Hui Xue, Camille M Fung, Edward M Levine, Anthea Letsou, K C Brennan, Richard I Dorsky
While innate behaviors are conserved throughout the animal kingdom, it is unknown whether common signaling pathways regulate the development of neuronal populations mediating these behaviors in diverse organisms. Here, we demonstrate that the Wnt/ß-catenin effector Lef1 is required for the differentiation of anxiolytic hypothalamic neurons in zebrafish and mice, although the identity of Lef1-dependent genes and neurons differ between these 2 species. We further show that zebrafish and Drosophila have common Lef1-dependent gene expression in their respective neuroendocrine organs, consistent with a conserved pathway that has diverged in the mouse...
August 2017: PLoS Biology
https://www.readbyqxmd.com/read/28797409/ivus-oct-and-coronary-artery%C3%A2-calcification-is-there-a-bone-of-contention
#11
EDITORIAL
Samin K Sharma, Yuliya Vengrenyuk, Annapoorna S Kini
No abstract text is available yet for this article.
August 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28795527/utility-of-the-guideliner-catheter-for-percutaneous-coronary-interventions-in-patients-with-prior-transcatheter-aortic-valve-replacement
#12
Aditya S Bharadwaj, Samit Bhatheja, Samin K Sharma, Annapoorna S Kini
The safety and utility of GuideLiner catheters in complex percutaneous coronary interventions (PCI) has been well established. Patients with prior trans-catheter aortic valve replacement especially with CoreValve, who present for PCI, pose a unique set of challenges. Not only does the operator often encounter difficulty with selective engagement of coronary ostia through the struts of the CoreValve, but also the complex nature of the underlying CAD in this high-risk population. We present a case series to illustrate the use of GuideLiner catheter as an adjunctive tool for PCI in this patient population...
August 10, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28777194/pancreatic-ductal-adenocarcinoma-with-high-radiotracer-uptake-in-68ga-prostate-specific-membrane-antigen-pet-ct
#13
Samine Sahbai, Petra Rieping, Christina Pfannenberg, Christian la Fougére, Matthias Reimold
Prostate-specific membrane antigen imaging with PET/CT is increasingly used in prostate cancer and was shown to have a high diagnostic performance. We report a clinical case of a 67-year-old man with previous history of operated prostate cancer and increasing prostate-specific antigen blood level. Ga-HBED-CC prostate-specific membrane antigen PET/CT imaging was indicated for the assessment of local recurrence and lymph node metastases of prostate cancer. In addition, a soft tissue mass in the body of the pancreas with high radiotracer uptake was detected...
September 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28774521/a-comparison-of-undergraduate-clinical-ophthalmology-learning-methods-smart-phone-television-display-versus-slit-lamp-teaching-telescope
#14
RANDOMIZED CONTROLLED TRIAL
Sandy Zhou Wenting, Margaret Million Samin, Srinivasan Sanjay, Kumari Neelam, Khalil Shibli, Su Chang, Jason Cheng
OBJECTIVE: To compare medical students' preference of smart phone television display (SPTD) to a slit-lamp teaching telescope (SLTT) in undergraduate clinical ophthalmology education. METHODS: This is a randomized, crossover, comparative study. Pairs of medical students were randomly assigned to 2 teaching sessions using either SPTD first followed by SLTT or in reverse order. Students were asked to give feedback on the 2 teaching devices by answering 6 questions using a numeric rating score from 1 to 10...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28765529/intracoronary-imaging-cholesterol-efflux-and-transcriptomics-after-intensive-statin-treatment-in-diabetes
#15
Surbhi Chamaria, Kipp W Johnson, Yuliya Vengrenyuk, Usman Baber, Khader Shameer, Aparna A Divaraniya, Benjamin S Glicksberg, Li Li, Samit Bhatheja, Pedro Moreno, Akiko Maehara, Roxana Mehran, Joel T Dudley, Jagat Narula, Samin K Sharma, Annapoorna S Kini
Residual atherothrombotic risk remains higher in patients with versus without diabetes mellitus (DM) despite statin therapy. The underlying mechanisms are unclear. This is a retrospective post-hoc analysis of the YELLOW II trial, comparing patients with and without DM (non-DM) who received rosuvastatin 40 mg for 8-12 weeks and underwent intracoronary multimodality imaging of an obstructive nonculprit lesion, before and after therapy. In addition, blood samples were drawn to assess cholesterol efflux capacity (CEC) and changes in gene expression in peripheral blood mononuclear cells (PBMC)...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722295/prevalence-correlates-and-impact-of-coronary-calcification-on-adverse-events-following-pci-with-newer-generation-des-findings-from-a-large-multiethnic-registry
#16
Robert S Copeland-Halperin, Usman Baber, Melissa Aquino, Anitha Rajamanickam, Swathi Roy, Choudhury Hasan, Nitin Barman, Jason C Kovacic, Pedro Moreno, Prakash Krishnan, Joseph M Sweeny, Roxana Mehran, George Dangas, Annapoorna S Kini, Samin K Sharma
OBJECTIVES: We sought to determine the prevalence, predictors, and clinical impact of target lesion calcification in patients undergoing percutaneous coronary intervention (PCI) with newer generation drug-eluting stents (DES) and devices. BACKGROUND: Coronary calcification is independently associated with adverse outcomes following PCI. While newer DES and contemporary devices are considered safer and more efficacious, their influence on outcomes following PCI of heavily calcified lesions is unknown...
July 19, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28719451/pancreatic-ductal-adenocarcinoma-with-high-radiotracer-uptake-in-68ga-prostate-specific-membrane-antigen-pet-ct
#17
Samine Sahbai, Petra Rieping, Christina Pfannenberg, Christian la Fougère, Matthias Reimold
Prostate-specific membrane antigen imaging with PET/CT is increasingly used in prostate cancer and was shown to have a high diagnostic performance. We report a clinical case of a 67-year-old man with previous history of operated prostate cancer and increasing prostate-specific antigen blood level. Ga-HBED-CC prostate-specific membrane antigen PET/CT imaging was indicated for the assessment of local recurrence and lymph node metastases of prostate cancer. In addition, a soft tissue mass in the body of the pancreas with high radiotracer uptake was detected...
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28704297/surgical-treatment-of-displaced-pediatric-lateral-condyle-fractures-of-the-humerus-by-the-posterior-approach
#18
William K Conaway, William L Hennrikus, Samine Ravanbakhsh, Zachary Winthrop, John Mahajan
The surgical approach for open reduction and internal fixation of lateral condyle fractures in children is controversial. Some authors recommend the lateral approach to the elbow over the posterior approach because of theoretical concern for injury to the vascular supply of the distal humerus and potential avascular necrosis (AVN). The purpose of this retrospective case series study is to report the outcomes of open reduction and internal fixation of displaced lateral condyle fractures of the humerus by the posterior approach...
July 12, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28695354/mobile-health-clinic-for-the-medical-management-of-clinical-sequelae-experienced-by-survivors-of-the-2013-2016-ebola-virus-disease-outbreak-in-sierra-leone-west-africa
#19
R E Guetiya Wadoum, A Samin, N G Mafopa, M Giovanetti, G Russo, P Turay, J Turay, M Kargbo, M T Kanu, B Kargbo, J Akpablie, C J Cain, P Pasin, V Batwala, M S Sobze, M Potestà, A Minutolo, V Colizzi, C Montesano
An Ebola survivor Mobile Health Clinic (MHC) was established to implement lasting changes in communities it operates by providing effective and efficient mobile healthcare. After months of development, the MHC solution was operationalised in February 2015, aiming to provide integrated primary healthcare services to address the medical and psychosocial needs of Ebola virus (EBOV) survivors living in areas with low medical coverage. A total of 910 medical consultations for 246 EBOV survivors were performed between 7 February 2015 and 10 June 2016...
November 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28675134/overview-of-the-infant-and-young-child-feeding-policy-environment-in-pakistan-federal-sindh-and-punjab-context
#20
Hana Mahmood, Yasmeen Suleman, Tabish Hazir, Durre Samin Akram, Shahadat Uddin, Michael J Dibley, Saleem Abassi, Amara Shakeel, Narjis Kazmi, Anne Marie Thow
BACKGROUND: Appropriate infant and young child feeding (IYCF) practices have been identified as important for appropriate child growth and development. (Ministry of Planning and Development, Ministry of National Health Services, Regulations and Coordination (2012)) Children in Pakistan still experience high rates of malnutrition, indicating a likely need for stronger IYCF policy. The purpose of this study was to identify major stakeholders who shape the IYCF policy environment and analyze which policies protect, promote and support IYCF practices, either directly or indirectly...
June 13, 2017: BMC Public Health
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