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https://www.readbyqxmd.com/read/28636805/a-hybrid-phantom-system-for-patient-skin-and-organ-dosimetry-in-fluoroscopically-guided-interventions
#1
David Borrego, Daniel Siragusa, Stephen Balter, Wesley E Bolch
To investigate calibrations for improved estimates of skin dose and to develop software for computing absorbed organ doses for fluoroscopically guided interventions (FGIs) with the use of radiation dose structured reports (RDSR) and the UF/NCI family of hybrid computational phantoms METHODS AND MATERIALS: Institutional review board approval was obtained for this retrospective study in which ten RDSRs were selected for their high cumulative reference air kerma values. Skin doses were computed using the University of Florida's rapid in-clinic peak skin dose algorithm (or UF-RIPSA)...
June 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/28636548/ilomastat-a-synthetic-inhibitor-of-mmps-prevents-lung-injury-induced-by-%C3%AE-ray-irradiation-in-mice
#2
Xiaoman Li, Dehui Ma, Xiaodan Zha, Dongqin Quan, Dong Pan, Manji Sun, Burong Hu, Baoquan Zhao
Lung injury is one of the pathological features in human or animal after radiation and the main side effect for patient after lung cancer radiotherapy. The efficient protective strategy still needs to exploit and the underlying mechanisms remain to be investigated. We found that the expression and activity of matrix metalloproteinases (MMPs) significantly increased at the early stage of radiation-induced lung injury (RILI). Pretreatment with Ilomastat, a synthetic inhibitor of MMPs, decreased the expression and activity of MMPs and significantly alleviated the lung inflammation and fibrosis in the irradiated mice, as well as enhanced the survival of irradiated mice...
June 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28636341/biochemical-characterization-of-wbkc-an-n-formyltransferase-from-brucella-melitensis
#3
Alexander S Riegert, Daniel P Chantigian, James B Thoden, Peter A Tipton, Hazel M Holden
It has become increasingly apparent within the last several years that unusual N-formylated sugars are often found on the O-antigens of such Gram negative pathogenic organisms as Francisella tularensis, Campylobacter jejuni, and Providencia alcalifaciens, amongst others. Indeed, in some species of Brucella, for example, the O-antigen contains 1,2-linked 4-formamido-4,6-dideoxy-alpha-D-mannosyl groups. These sugars, often referred to as N-formylperosamine, are synthesized in pathways initiating with GDP-mannose...
June 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28636316/a-novel-melamine-o-phthalaldehyde-covalent-organic-frameworks-nanaosheets-enhancement-flame-retardant-and-mechanical-performances-of-thermoplastic-polyurethanes
#4
Xiaowei Mu, Jing Zhan, Xiaming Feng, Bihe Yuan, Shuilai Qiu, Lei Song, Yuan Hu
Covalent organic frameworks (COFs) nanosheets prepared from condensation reaction between melamine and o-phthalaldehyde are firstly prepared through ball milling and then incorporated into thermoplastic polyurethanes (TPU) by solution mixing. Transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectrometer are applied to characterize COFs nanosheets. It is observed apparently from TEM image that COFs nanosheets are obtained...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28636310/sensing-mechanisms-in-the-redox-regulated-2fe-2s-cluster-containing-bacterial-transcriptional-factor-soxr
#5
Kazuo Kobayashi
Bacteria possess molecular biosensors that enable responses to a variety of stressful conditions, including oxidative stress, toxic compounds, and interactions with other organisms, through elaborately coordinated regulation of gene expression. In Escherichia coli and related bacteria, the transcription factor SoxR functions as a sensor of oxidative stress and nitric oxide (NO). SoxR protein contains a [2Fe-2S] cluster essential for its transcription-enhancing activity, which is regulated by redox changes in the [2Fe-2S] cluster...
June 21, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28635653/virtual-screening-against-phosphoglycerate-kinase-1-in-quest-of-novel-apoptosis-inhibitors
#6
Jie Xia, Bo Feng, Qianhang Shao, Yuhe Yuan, Xiang Simon Wang, Naihong Chen, Song Wu
Inhibition of apoptosis is a potential therapy to treat human diseases such as neurodegenerative disorders (e.g., Parkinson's disease), stroke, and sepsis. Due to the lack of druggable targets, it remains a major challenge to discover apoptosis inhibitors. The recent repositioning of a marketed drug (i.e., terazosin) as an anti-apoptotic agent uncovered a novel target (i.e., human phosphoglycerate kinase 1 (hPgk1)). In this study, we developed a virtual screening (VS) pipeline based on the X-ray structure of Pgk1/terazosin complex and applied it to a screening campaign for potential anti-apoptotic agents...
June 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28635205/recurrence-of-right-lower-lobe-pneumonia-3-years-after-the-first-episode-in-an-otherwise-healthy-13-year-old-girl
#7
Antonino Capizzi, Oliviero Sacco, Giovanni A Rossi, Michela Silvestri
Recurrent pneumonia is one of the most frequent reasons for referral to paediatric chest physicians. The diagnostic work-up is dependent on whether infection repeatedly occurs in the same lung lobe, or affects multiple lobes and/or different areas in different episodes. A 13-year-old girl was admitted with a second episode of right lower lobe pneumonia. The chest x-ray demonstrated an inhomogeneous opacity, without a clearly recognizable segmental distribution. A contrast-enhanced CT scan, was therefore performed that showed a polycyclic consolidation with blood supply from a systemic artery, originated from the thoracic aorta...
May 25, 2017: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
https://www.readbyqxmd.com/read/28635141/high-sensitivity-non-invasive-detection-of-calcifications-deep-inside-biological-tissue-using-transmission-raman-spectroscopy
#8
Adrian Ghita, Pavel Matousek, Nick Stone
The aim of this research was to develop a novel approach to probe non-invasively the composition of inorganic chemicals buried deep in large volume biological samples. The method is based on advanced Transmission Raman Spectroscopy (TRS) permitting chemical specific detection within a large sampling volume. The approach could be beneficial to chemical identification of the breast calcifications detected during mammographic X-ray procedures. The chemical composition of a breast calcification reflects the pathology of the surrounding tissue, malignant or benign and potentially the grade of malignancy...
June 21, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28634056/a-new-and-accurate-predictive-model-for-the-efficacy-of-extracorporeal-shock-wave-therapy-in-managing-patients-with-chronic-plantar-fasciitis
#9
Mengchen Yin, Ni Chen, Quan Huang, Anastasia Sulindro Marla, Junming Ma, Jie Ye, Wen Mo
OBJECTIVES: To identify factors for the outcome of a minimum clinically successful therapy and to establish a predictive model of extracorporeal shock wave therapy (ESWT) in managing patients with chronic plantar fasciitis. DESIGN: Randomized controlled, prospective study. SETTING: Outpatient of local medical center settings. PARTICIPANTS: Patients treated for symptomatic chronic plantar fasciitis between 2014 and 2016 (N=278)...
June 17, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28633856/using-of-sonochemically-prepared-sbsi-for-electrospun-nanofibers
#10
M Nowak, T Tański, P Szperlich, W Matysiak, M Kępińska, D Stróż, Ł Bober, B Toroń
A novel polymeric, polyacrylonitrile (PAN) nanofibers containing ferroelectric and semiconducting antimony sulfoiodide (SbSI) have been made by electrospinning. SbSI nanowires, used as the filler, have been prepared sonochemically from antimony sulphide (Sb2S3) and antimony tri-iodide (SbI3) for the first time. Nanocrystalline SbSI has been fabricated in ethanol under ultrasonic irradiation (20kHz, 565W/cm(2)) at 323K within 2h. The products have been characterized by using techniques such as powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, high-resolution transmission electron microscopy, selected area electron diffraction and optical diffuse reflection as well as transmission spectroscopy...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633796/cotton-osteotomy-in-flatfoot-reconstruction-a-case-report-highlighting-surgical-technique-and-modified-incision-to-protect-the%C3%A2-medial-dorsal-cutaneous-nerve
#11
Troy J Boffeli, Katherine R Schnell
The Cotton osteotomy or opening wedge medial cuneiform osteotomy is a useful adjunctive flatfoot reconstructive procedure that is rarely performed in isolation. The Cotton procedure is relatively quick to perform and effectively corrects forefoot varus deformity after rearfoot fusion or osteotomy to achieve a rectus forefoot to rearfoot relationship. Proper patient selection is critical, because preoperative findings of medial column joint instability, concomitant hallux valgus deformity, or degenerative joint disease of the medial column might be better treated with arthrodesis of the naviculocuneiform or first tarsometatarsal joints...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28632783/transient-effects-of-transfusion-and-feeding-advances-volumetric-and-caloric-on-necrotizing-enterocolitis-development-a-case-crossover-study
#12
Vi T Le, Mark A Klebanoff, Maria M Talavera, Jonathan L Slaughter
OBJECTIVE: To evaluate the short-term effects of feed fortification, feed volume increase, and PRBC transfusion on the odds of developing NEC. STUDY DESIGN: Case-crossover study of neonatal intensive care infants born at ≤ 32 weeks' gestation who were admitted to 5 central Ohio intensive care units from January 2012-July 2016 and developed NEC Bell Stage ≥2. Each patient served as their own control, with exposure during the 48-hour period just prior to NEC onset (hazard period) being compared to a preceding 48-hour control period, thus eliminating confounding by patient factors fixed between both intervals...
2017: PloS One
https://www.readbyqxmd.com/read/28632277/variable-temperature-and-high-pressure-crystal-chemistry-of-perovskite-formamidinium-lead-iodide-a-single-crystal-x-ray-diffraction-and-computational-study
#13
Shijing Sun, Zeyu Deng, Yue Wu, Fengxia Wei, Furkan Halis Isikgor, Federico Brivio, Michael W Gaultois, Jianyong Ouyang, Paul D Bristowe, Anthony K Cheetham, Gregor Kieslich
We investigate the variable temperature (100-450 K) and high-pressure (p = ambient - 0.74 GPa) crystal chemistry of the black perovskite formamidinium lead iodide, [(NH2)2CH]PbI3, using single crystal X-ray diffraction. In both cases we find a phase transition to a tetragonal phase. Our experimental results are combined with first principles calculations, providing information about the electronic properties of [(NH2)2CH]PbI3 as well as the most probable orientation of the [(NH2)2CH](+) cations.
June 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28631930/fluorescent-and-electrochemical-supramolecular-coordination-polymer-hydrogels-formed-from-ion-tuned-self-assembly-of-small-bis-terpyridine-monomer
#14
Xudong Yu, Zengyao Wang, Yajuan Li, Lijun Geng, Jujie Ren, Guoliang Feng
Herein, ditopic ligand DTA comprised of terpyridine and acetylene segments with only one aromatic π-conjugated building block was designed and synthesized. Driven by metal-ligand coordination interactions, we presented that the use of metal salts can direct the self-assembly of DTA in the generation of fluorescent and electrochemical polymers that entrapped water to form ambidextrous hydrogels. These were characterized by several approaches including fluorescent titrations, UV-vis, circular dichroism, and X-ray diffraction spectra as well as scanning electron microscopy and transmission electron microscopy experiments...
June 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28631925/anticancer-activity-of-polyoxometalate-bisphosphonate-complexes-synthesis-characterization-in-vitro-and-in-vivo-results
#15
Amandine Boulmier, Xinxin Feng, Olivier Oms, Pierre Mialane, Eric Rivière, Christopher J Shin, Jiaqi Yao, Tadahiko Kubo, Taisuke Furuta, Eric Oldfield, Anne Dolbecq
We synthesized a series of polyoxometalate-bisphosphonate complexes containing Mo(VI)O6 octahedra, zoledronate, or an N-alkyl (n-C6 or n-C8) zoledronate analogue, and in two cases, Mn as a heterometal. Mo6L2 (L = Zol, ZolC6, ZolC8) and Mo4L2Mn (L = Zol, ZolC8) were characterized by using single-crystal X-ray crystallography and/or IR spectroscopy, elemental and energy dispersive X-ray analysis and (31)P NMR. We found promising activity against human nonsmall cell lung cancer (NCI-H460) cells with IC50 values for growth inhibition of ∼5 μM per bisphosphonate ligand...
June 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28631808/fabrication-of-%C3%AE-cyclodextrin-mediated-single-bimolecular-inclusion-complex-characterization-molecular-docking-in-vitro-release-and-bioavailability-studies-for-gefitinib-and-simvastatin-conjugate
#16
Souvik Basak, Sandip Mondal, Suddhasattya Dey, Plaban Bhattacharya, Achintya Saha, Vinay Deep Punetha, Ali Abbas, Nanda Gopal Sahoo
OBJECTIVES: Introduction of multiple molecules in a single inclusion complex, albeit cheaper, lacks conclusive attempts in earlier drug delivery reports. This manuscript emphasizes simultaneous incorporation of two anticancer drugs, gefitinib (G) and simvastatin (S), in a single molecule of β-cyclodextrin for the first time to achieve effective drug delivery. METHODS: The inclusion complex (GSBCD) was prepared by cosolvent evaporation technique using β-cyclodextrin (BCD) as carrier...
June 20, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28631792/nanoscopic-dynamics-of-bicontinous-microemulsions-effect-of-membrane-associated-protein
#17
V K Sharma, Douglas G Hayes, Volker S Urban, Hugh M O'Neill, M Tyagi, E Mamontov
Bicontinous microemulsions (BμE) generally consist of nanodomains formed by surfactant in a mixture of water and oil at nearly equal proportions and are potential candidates for the solubilization and purification of membrane proteins. Here we present the first time report of nanoscopic dynamics of surfactant monolayers within BμEs formed by the anionic surfactant sodium dodecyl sulfate (SDS) measured on the nanosecond to picosecond time scale using quasielastic neutron scattering (QENS). BμEs investigated herein consisted of middle phases isolated from Winsor-III microemulsion systems that were formed by mixing aqueous and oil solutions under optimal conditions...
June 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28631217/24-month-open-label-teriparatide-once-weekly-efficacy-research-trial-examining-bone-mineral-density-in-subjects-with-primary-osteoporosis-and-high-fracture-risk
#18
Toshitsugu Sugimoto, Masataka Shiraki, Masao Fukunaga, Hiroshi Hagino, Teruki Sone, Tetsuo Nakano, Hideaki Kishimoto, Masako Ito, Hideki Yoshikawa, Mitsukazu Kishida, Chika Irie, Toshitaka Nakamura
INTRODUCTION: To clarify the additional efficacy and safety benefits of 24 months' treatment with the once-weekly formulation of teriparatide, which is currently used for 72 weeks. METHODS: This was a multicenter, open-label, single-arm study conducted in Japan. Subjects who were 65 years or older with prevalent vertebral fractures received once-weekly subcutaneous injection of 56.5 μg teriparatide for 24 months. The main outcome measure was percentage change from baseline in lumbar (L2-L4) BMD measured by dual-energy X-ray absorptiometry...
June 19, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28630853/mega-tumour-chondrosarcoma-of-humerus-an-insanely-large-tumor-and-its-social-implications
#19
Rakesh Sharma, Harminder Singh Sohal, Neeraj Malhotra
INTRODUCTION: Large size bone tumors are rare as patients present quite early. The current article reports a large chondrosarcoma removed from left humerus. The rarity of such large size tumors is focus of the report. CASE REPORT: Forty year old male presented with a huge mass in this left arm. The same patient apparently was admitted three years back for excision of the arm swelling which was relatively small that time. However the patient did not undergo surgery and was takin treatment from local bone setters during the last three years and tumor grew to a larger size during this period...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28630840/suspension-arthroplasty-combined-with-ligament-reconstruction-of-the-thumb-carpometacarpal-joint-to-salvage-two-failed-arthroplasties-a-case-report
#20
Ryosuke Kakinoki, Kazuhiko Hashimoto, Hiroki Tanaka, Masao Akagi
INTRODUCTION: Thumb basal joint arthroplasty with removal of the entire trapezium is often followed by proximal subsidence and impingement of the thumb metacarpal to the scaphoid, which is a common cause of post-operative thumb pain. Treatment of this impingement is a challenge among surgeons. We performed suspension arthroplasty combined with intercarpal ligament reconstruction using a strip of the extensor carpi radialis longus (ECRL) tendon on a patient suffering from pain caused by this type of the impingement and obtained a successful outcome...
January 2017: Journal of Orthopaedic Case Reports
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