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https://www.readbyqxmd.com/read/28227420/automated-in-vivo-delineation-of-lumen-wall-using-intravascular-ultrasound-imaging
#1
Debarghya China, Manas K Nag, K M Mandana, Anup K Sadhu, Pabitra Mitra, Chandan Chakraborty, Debarghya China, Manas K Nag, K M Mandana, Anup K Sadhu, Pabitra Mitra, Chandan Chakraborty, Chandan Chakraborty, Manas K Nag, Debarghya China, Pabitra Mitra, Anup K Sadhu, K M Mandana
This paper presents a novel methodology for automated detection and extraction of the lumen wall from Intravascular Ultrasound (IVUS) frames. IVUS is an in-vivo pull back imaging technique and provides a sequential frame of images for diagnosis of atherosclerotic heart disease. The detection and segmentation of lumen wall is necessary for predicting the arterial wall blockage. Lumen wall is recognized and segmented with the help of seed refinement and random walks algorithms, in tunica and lumen area. The proposed methodology was tested on 147 frames of 13 patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28209095/leptospira-seropositivity-as-a-risk-factor-for-mesoamerican-nephropathy
#2
Alejandro Riefkohl, Oriana Ramírez-Rubio, Rebecca L Laws, Michael D McClean, Daniel E Weiner, James S Kaufman, Renee L Galloway, Sean V Shadomy, Marta Guerra, Juan José Amador, José Marcel Sánchez, Damaris López-Pilarte, Chirag R Parikh, Jessica H Leibler, Daniel R Brooks
BACKGROUND: Leptospirosis is postulated as a possible cause of Mesoamerican Nephropathy (MeN) in Central American workers. OBJECTIVES: Investigate job-specific Leptospira seroprevalence and its association with kidney disease biomarkers. METHODS: In 282 sugarcane workers, 47 sugarcane applicants and 160 workers in other industries, we measured anti-leptospiral antibodies, serum creatinine, and urinary injury biomarkers, including neutrophil gelatinase-associated lipocalin (NGAL), interleukin-18 (IL-18), and N-acetyl-D-glucosaminidase (NAG)...
February 17, 2017: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28197984/quantifying-bacterial-attachment-and-detachment-using-leaching-solutions-of-various-ionic-strengths-after-bacterial-pulse
#3
Nag-Choul Choi, Jae-Woo Choi, Kyu-Sang Kwon, Sang-Gil Lee, Soonjae Lee
In this study, we quantified the attachment and detachment of bacteria during transport in order to elucidate the contributions of reversible attachment on bacterial breakthrough curves. The first set of breakthrough experiment was performed for a laboratory sand column using leaching solutions of deionized water and mineral salt medium (MSM) of 200 mM with reference to KCl solution by employing Pseudomonas putida as a model bacterium. In the second set of experiment, the ionic strengths of leaching solutions immediately after bacterial pulse were lowered to tenfold and 100-fold diluted system (2 and 20 mM MSM) to focus on the influence of physicochemical factor...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28193098/nanoparticle-formulation-increases-syzygium-cumini-antioxidant-activity-in-candida-albicans-infected-diabetic-rats
#4
Paula E R Bitencourt, Lariane O Cargnelutti, Carolina S Stein, Raquel Lautenchleger, Luana M Ferreira, Manuela Sangoi, Laura Denardi, Raphaela M Borges, Aline Boligon, Rafael N Moresco, Letícia Cruz, Régis A Zanette, Sydney H Alves, Maria Beatriz Moretto
CONTEXT: Syzygium cumini (L.) Skeels (Myrtaceae) is a medicinal plant widely used in folk medicine for the treatment of diabetes mellitus (DM). However, studies on the use of this plant and of nanoparticle formulations against DM-related fungal infections are scarce. OBJECTIVE: To evaluate the effect of the treatments with aqueous seed extract of S. cumini (ASc) and ASc-loaded polymeric nanoparticles (NPASc) on biochemical parameters in Candida albicans-infected diabetic rats...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28188339/microbial-composition-and-diversity-are-associated-with-plant-performance-a-case-study-on-long-term-fertilization-effect-on-wheat-growth-in-an-ultisol
#5
Lihua Li, Fenliang Fan, Alin Song, Chang Yin, Peiyuan Cui, Zhaojun Li, Yongchao Liang
The association between microbial communities and plant growth in long-term fertilization system has not been fully studied. In the present study, impacts of long-term fertilization have been determined on the size and activity of soil microbial communities and wheat performance in a red soil (Ultisol) collected from Qiyang Experimental Station, China. For this, different microbial communities originating from long-term fertilized pig manure (M), mineral fertilizer (NPK), pig manure plus mineral fertilizer (MNPK), and no fertilizer (CK) were used as inocula for the Ultisol tested...
February 10, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28188148/analysis-of-sphingolipids-in-human-corneal-fibroblasts-from-normal-and-keratoconus-patients
#6
Hui Qi, Shrestha Priyadarsini, Sarah E Nicholas, Akhee Sarker-Nag, Jeremy Allegood, Charles E Chalfant, Nawajes A Mandal, Dimitrios Karamichos
The pathophysiology of human keratoconus (KC), a bilateral progressive corneal disease, leading to protrusion of the cornea, stromal thinning, and scarring is not well understood. In this study we investigated a novel Sphingolipid (SPL) signaling pathway through which KC may be regulated. Using human corneal fibroblasts (HCF) and human keratoconus cells (HKC) we examined the SPL pathway modulation. Both cell types were stimulated by the three TGF-β isoforms: TGF-B1 (T1), B2 (T2), and B3 (T3). All samples were analyzed using lipidomics, and real time-PCR...
February 10, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28173994/intraoperative-high-dose-rate-brachytherapy-an-american-brachytherapy-society-consensus-report
#7
REVIEW
S Lloyd, K M Alektiar, S Nag, Y J Huang, C L Deufel, F Mourtada, D K Gaffney
PURPOSE: This report presents recommendations from the American Brachytherapy Society for the use of intraoperative high-dose-rate (IOHDR) brachytherapy. METHODS AND MATERIALS: Members of the American Brachytherapy Society with expertise in IOHDR formulated this document based on their clinical experience and a review of the literature. This report covers the use of IOHDR in colorectal cancer, soft tissue sarcoma, gynecologic cancers, head and neck cancers, and pediatric cancers...
February 4, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28173629/enhanced-dependency-of-kras-mutant-colorectal-cancer-cells-on-rad51-dependent-homologous-recombination-repair-identified-from-genetic-interactions-in-saccharomyces-cerevisiae
#8
Murugan Kalimutho, Amanda L Bain, Bipasha Mukherjee, Purba Nag, Devathri M Nanayakkara, Sarah K Harten, Janelle L Harris, Goutham Narayanan Subramanian, Debottam Sinha, Senji Shirasawa, Sriganesh Srihari, Sandeep Burma, Kum Kum Khanna
Activating KRAS mutations drive colorectal cancer tumorigenesis and influence response to anti-EGFR targeted therapy. Despite recent advances in understanding Ras signaling biology and the revolution in therapies for melanoma using BRAF inhibitors, no targeted agents have been effective in KRAS mutant cancers, mainly due to activation of compensatory pathways. Here, by leveraging the largest synthetic lethal genetic interactome in yeast, we identify that KRAS-mutated colorectal cancer cells have augmented homologous recombination repair (HRR) signaling...
February 7, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28157933/stimulated-emission-in-aluminum-laser-induced-plasma-kinetic-model-of-population-inversion
#9
Igor Gornushkin, Reto Glaus, Lev Nagli
The stimulated emission (SE) in aluminum laser-induced plasma pumped in resonance with the 3s<sup>2</sup>3p-3s<sup>2</sup>4s aluminum transition at 266.04 nm is modeled. A collisional-radiative plasma model based on kinetic equations is proposed to explain the creation of the population inversion and lasing. The model predicts fast depopulation of the ground 3s<sup>2</sup>3p state by the absorption of resonant laser light at 266 nm and very fast population of the excited 3s<sup>2</sup>4s state by the cascade transitions from the laser-pumped level, which is driven optically and by collisions...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28152768/improving-care-quality-for-patients-with-soft-tissue-and-bone-sarcoma-by-establishing-a-national-virtual-tumor-board-and-electronic-consultation-platform
#10
Andrew Fang, Maihgan Kavanagh, Brian Kim, Jason D Lee, Craig McCormick, Lee Jae Morse, Subir Nag, Grant Nybbaken, Peter Peng, Corey M Schwartz, Joseph Song, Denah Renee Taggart, Jeanette Cu Yu
: 211 Background: Bone and soft tissue sarcomas are relatively uncommon and their management is extremely complex requiring coordinated multidisciplinary expertise for optimal care. Because Kaiser Permanente operates across many geographic regions in the country, in-person tumor board is not practical. METHODS: The Kaiser Permanente Northern California medical oncology team has developed a system-based virtual tumor board (VTB) and electronic consultation (EC) platform comprised of experts from several key disciplines including musculoskeletal/surgical oncology, musculoskeletal radiology, pathology, radiation oncology, brachytherapy, medical adult and pediatric oncology...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28150912/luminescence-plasmonic-and-magnetic-properties-of-doped-semiconductor-nanocrystals-current-developments-and-future-prospects
#11
Narayan Pradhan, Samrat Das Adhikari, Angshuman Nag, D D Sarma
Introducing few atoms of impurities or dopants in semiconductor nanocrystals can drastically alter the existing or even introduce new properties. For example, mid-gap states created by doping tremendously affect photocatalytic activities and surface controlled redox reactions, generate new emission centres, show thermometric optical switching, make suitable FRET donors by enhancing the excited state lifetime and also create localized surface plasmon resonance induced low energy absorption. In addition, researchers have more recently started focusing their attention on doped nanocrystals as an important and alternative material for solar energy conversion in order to meet the current demand for renewable energy...
February 2, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28145395/composite-marker-of-cognitive-dysfunction-and-brain-atrophy-is-highly-accurate-in-discriminating-between-relapsing-remitting-and-secondary-progressive-multiple-sclerosis
#12
Rasa Kizlaitienė, Gintaras Kaubrys, Nataša Giedraitienė, Naglis Ramanauskas, Jūratė Dementavičienė
BACKGROUND With the advent of numerous new-generation disease-modifying drugs for multiple sclerosis (MS), the discrimination between relapsing-remitting MS (RRMS) and secondary progressive MS (SPMS) has become a problem of high importance. The aim of our study was to find a simple way to accurately discriminate between RRMS and SPMS that is applicable in clinical practice as a composite marker, using the linear measures of magnetic resonance imaging (MRI) and the results of cognitive tests. MATERIAL AND METHODS We included 88 MS patients in the study: 43 participants had RRMS and 45 had SPMS...
February 1, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28127534/incorporation-of-silver-nanoparticles-on-the-surface-of-orthodontic-microimplants-to-achieve-antimicrobial-properties
#13
Adith Venugopal, Nallal Muthuchamy, Harsh Tejani, Anantha-Iyengar Gopalan, Kwang-Pill Lee, Heon-Jin Lee, Hee Moon Kyung
OBJECTIVE: Microbial aggregation around dental implants can lead to loss/loosening of the implants. This study was aimed at surface treating titanium microimplants with silver nanoparticles (AgNPs) to achieve antibacterial properties. METHODS: AgNP-modified titanium microimplants (Ti-nAg) were prepared using two methods. The first method involved coating the microimplants with regular AgNPs (Ti-AgNP) and the second involved coating them with a AgNP-coated biopolymer (Ti-BP-AgNP)...
January 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28124000/preoperative-prognostic-values-of-%C3%AE-fetoprotein-afp-and-protein-induced-by-vitamin-k-absence-or-antagonist-ii-pivka-ii-in-patients-with-hepatocellular-carcinoma-for-living-donor-liver-transplantation
#14
Seok-Hwan Kim, Deok-Bog Moon, Wan-Joon Kim, Woo-Hyoung Kang, Jae Hyun Kwon, Eun Kyung Jwa, Hwui-Dong Cho, Su-Min Ha, Yong-Kyu Chung, Sung-Gyu Lee
BACKGROUND: Adult living donor liver transplantation (LDLT) is one of the best treatments for hepatocellular carcinoma (HCC). However, when recurrence of HCC after LDLT occurs, the prognosis is poor because of rapid progression. Preoperative level of α-fetoprotein (AFP) and protein induced by vitamin K antagonist-II (PIVKA-II) reportedly correlate with recurrence of HCC after LDLT. METHODS: We examined AFP and PIVKA-II preoperatively as predictors of HCC recurrence in 461 patients who underwent LDLT using right liver graft for HCC from May 2007 to December 2013...
December 2016: Hepatobiliary Surgery and Nutrition
https://www.readbyqxmd.com/read/28122570/the-renal-tubular-damage-marker-urinary-n-acetyl-%C3%AE-d-glucosaminidase-may-be-more-closely-associated-with-early-detection-of-atherosclerosis-than-the-glomerular-damage-marker-albuminuria-in-patients-with-type-2-diabetes
#15
So Ra Kim, Yong-Ho Lee, Sang-Guk Lee, Eun Seok Kang, Bong-Soo Cha, Byung-Wan Lee
BACKGROUND: To determine the association between urinary N-acetyl-β-D-glucosaminidase (NAG), a marker of renal tubulopathy, and carotid intima-media thickness (IMT) and plaques in patients with type 2 diabetes mellitus (T2D) and to compare the predictive value of NAG versus albuminuria, a marker of renal glomerulopathy. METHODS: A total of 343 participants were enrolled in this retrospective cross-sectional study. We recruited participants with T2D who were tested for blood glucose parameters, urinary NAG, and urinary albumin-to-creatinine ratio (ACR) and had been checked for carotid ultrasonography...
January 26, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28122201/in%C3%A2-vivo-measurement-of-pde10a-enzyme-occupancy-by-positron-emission-tomography-pet-following-single-oral-dose-administration-of-pf-02545920-in-healthy-male-subjects
#16
Marielle Delnomdedieu, Anton Forsberg, Adam Ogden, Patrik Fazio, Ching-Ray Yu, Per Stenkrona, Sridhar Duvvuri, William David, Nabil Al-Tawil, Ottavio V Vitolo, Nahid Amini, Sangram Nag, Christer Halldin, Andrea Varrone
Phosphodiesterase 10A (PDE10A) is an enzyme highly enriched in the striatal medium spiny neurons. It is involved in the regulation of cytoplasmic levels of cAMP and cGMP and signaling within the basal ganglia. This study with PDE10A radioligand [(18)F]MNI-659 was designed to measure the enzyme occupancy of PF-02545920 in 8 healthy male volunteers (48 ± 4 years) after a single oral dose (10 mg or 20 mg) and to evaluate safety and tolerability. Arterial blood sampling was performed to obtain a metabolite-corrected plasma input function for the quantification of [(18)F]MNI-659 binding to PDE10A...
January 22, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28120924/broadband-energy-harvester-using-non-linear-polymer-spring-and-electromagnetic-triboelectric-hybrid-mechanism
#17
Rahul Kumar Gupta, Qiongfeng Shi, Lokesh Dhakar, Tao Wang, Chun Huat Heng, Chengkuo Lee
Over the years, several approaches have been devised to widen the operating bandwidth, but most of them can only be triggered at high accelerations. In this work, we investigate a broadband energy harvester based on combination of non-linear stiffening effect and multimodal energy harvesting to obtain high bandwidth over wide range of accelerations (0.1 g-2.0 g). In order to achieve broadband behavior, a polymer based spring exhibiting multimodal energy harvesting is used. Besides, non-linear stiffening effect is introduced by using mechanical stoppers...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28119020/in-vitro-metabolism-of-benzo-a-pyrene-7-8-dihydrodiol-and-dibenzo-def-p-chrysene-11-12-diol-in-rodent-and-human-hepatic-microsomes
#18
Jordan N Smith, Denis Mehinagic, Subhasree Nag, Susan R Crowell, Richard A Corley
Polycyclic aromatic hydrocarbons (PAHs) are contaminants that are ubiquitously found in the environment, produced through combustion of organic matter or petrochemicals, and many of which are procarcinogens. The prototypic PAH, benzo[a]pyrene (B[a]P) and the highly carcinogenic dibenzo[def,p]chrysene (DBC) are metabolically activated by isoforms of the P450 enzyme superfamily producing benzo[a]pyrene-7,8-dihydrodiol (B[a]P diol), dibenzo[def,p]chrysene-11,12 diol (DBC diol). Each of these diols can be further metabolized by cytochrome P450 enzymes to highly reactive diol-epoxide metabolites that readily react with DNA or by phase II conjugation facilitating excretion...
January 21, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28102080/n-oleoylglycine-induced-hyperphagia-is-associated-with-the-activation-of-agouti-related-protein-agrp-neuron-by-cannabinoid-receptor-type-1-cb1r
#19
Junguo Wu, Canjun Zhu, Liusong Yang, Zhonggang Wang, Lina Wang, Songbo Wang, Ping Gao, Yongliang Zhang, Qingyan Jiang, Xiaotong Zhu, Gang Shu
N-Acyl amino acids (NAAAs) are conjugate products of fatty acids and amino acids, which are available in animal-derived food. We compared the effects of N-arachidonoylglycine (NAGly), N-arachidonoylserine (NASer), and N-oleoylglycine (OLGly) on in vivo food intake and in vitro [Ca(2+)]i of Agouti-related protein (AgRP) neurons to identify the role of these compounds in energy homeostasis. Hypothalamic neuropeptide expression and anxiety behavior in response to OLGly were also tested. To further identify the underlying mechanism of OLGly on food intake, we first detected the expression level of potential OLGly receptors...
January 30, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28089582/a-model-for-screening-and-prioritizing-consumer-nanoproduct-risks-a-case-study-from-south-africa
#20
Ndeke Musee
The potential risks of the increasing variety and volume of engineered nanomaterials (ENMs) entering into the ecosystem remain poorly quantified. In recent years, information essential to evaluate the ecological risks of ENMs has increased. However, the data are highly fragmented, limited, or severely lacking. This limits the usefulness of the information to support holistic screening and prioritization of potentially harmful ENMs. To screen and prioritize ENMs risks, we adopted a two-phased approach. First, a holistic framework model was developed to integrate a diverse set of factors aimed to assess the potential hazard, exposure, and in turn, risk to the ecosystem of ENMs from a given consumer nanoproduct...
January 12, 2017: Environment International
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