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https://www.readbyqxmd.com/read/28944789/mechanism-of-ultrafast-non-reactive-deactivation-of-the-retinal-chromophore-in-non-polar-solvents
#1
M Mališ, J Novak, G Zgrablić, F Parmigiani, N Došlić
The photoisomerization of the all-trans protonated Schiff base of retinal (SBR(+)) in solution is highly inefficient. The present theoretical and experimental investigation aims at disclosing the mechanisms of ultrafast, non-reactive relaxation of SBR(+) that lead to the drastic decrease in the isomerization yield in non-polar solvents. Our pump-probe measurements demonstrate the sensitivity of the all-trans SBR(+) excited-state dynamics on the electrostatic interaction with the surrounding counterions and the crucial importance of the chromophore microenvironment...
September 25, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28943822/decreasing-the-time-to-oral-antibiotics-in-a-university-hospital-pediatric-emergency-department
#2
R Zachary Thompson, Brian Gardner, Thomas Carter, Aric Schadler, Joye Allen, Abby Bailey
OBJECTIVES: To compare time to administration of oral antibiotics in the pediatric emergency department (ED) when antibiotics are stored in the pediatric ED versus when they were dispensed by central pharmacy services within an academic medical center. METHODS: This was a retrospective review of patients who received a one-time dose of oral antibiotics within the pediatric ED and were subsequently discharged home. Two 3-month time periods were compared to determine the metrics of providing oral antibiotics before and after these medications were stocked in the pediatric ED automated dispensing cabinet (ADC)...
July 2017: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
https://www.readbyqxmd.com/read/28942996/high-resolution-2d-lc-analysis-of-key-linker-drug-intermediate-used-in-antibody-drug-conjugates-adcs
#3
C J Venkatramani, Shu Rong Huang, Mohammad Al-Sayah, Ila Patel, Larry Wigman
In this manuscript, the application of high-resolution sampling (HRS) two-dimensional liquid chromatography (2D-LC) in the detailed analysis of key linker drug intermediate is presented. Using HRS, selected regions of the primary column eluent were transferred to a secondary column with fidelity enabling qualitative and quantitative analysis of linker drugs. The primary column purity of linker drug intermediate ranged from 88.9% to 94.5% and the secondary column purity ranged from 99.6% to 99.9%, showing lot-to-lot variability, significant differences between the three lots, and substantiating the synthetic and analytical challenges of ADCs...
September 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28941163/colorectal-wall-regeneration-resulting-from-the-association-of-chitosan-hydrogel-and-stromal-vascular-fraction-from-adipose-tissue
#4
Quentin Denost, Arnaud Pontallier, Etienne Buscail, Alexandra Montembault, Reine Bareille, Robin Siadous, Marlene Durand, Samantha Delmond, Laurent David, Laurence Bordenave
Chitosan hydrogel and Adipose Derived Stem Cells (ADCS) have been reported as the optimal partnership for colorectal tissue engineering. In that field, the aim of the current experiment was to asses, the interest of seeding ADSC on chitosan hydrogel patches in an in vivo comparative study and on a tube intended replace a colonic segment in an in vivo feasibility study. In the comparative study, a 2x3 cm colonic wall defect was performed in 20 swines and repaired by suturing a chitosan hydrogel patch: acellular matrix (Group A, n=10) vs...
September 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28941150/brentuximab-vedotin-exerts-profound-antiproliferative-and-pro-apoptotic-efficacy-in-cd30-positive-as-well-as-cocultured-cd30-negative-germ-cell-tumour-cell-lines
#5
Stefan Schönberger, Cornelius van Beekum, Barbara Götz, Daniel Nettersheim, Hubert Schorle, Dominik T Schneider, Anna Casati, Rogerio B Craveiro, Gabriele Calaminus, Dagmar Dilloo
Prognosis in patients suffering from high-risk, refractory and relapsed germ cell tumours (GCT) often comprising of CD30-positive embryonal carcinoma (EC) components remains poor. Thus, novel treatment strategies are warranted. The antibody-drug conjugate (ADC) brentuximab vedotin delivers the potent antimitotic drug monomethyl auristatin E (MMAE) to CD30-expressing tumour cells. After CD30 binding, internalization and intracellular linker cleavage cytotoxic MMAE can efflux and eradicate neighbouring CD30-negative cells...
September 22, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28939538/incremental-value-of-multiparametric-whole-body-mr-imaging-over-whole-spine-magnetic-resonance-imaging-in-neurofibromatosis-type-i-patients
#6
Lihua Zhang, Dessouky Riham, Yin Xi, Avneesh Chhabra, Lu Q Le
AIM: To determine the incremental value of multiparametric whole-body (WBMRI) over whole spine magnetic resonance imaging (WSMRI) in neurofibromatosis type1 (NF1) patients. METHODS: A consecutive series of 30 patients with known NF1 underwent WBMRI screening using anatomic, diffusion and contrast imaging over a 30-month period. 13/30 patients also had WSMRI. Tumors were classified per location and morphology and were software segmented to determine numbers and volumes...
September 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28938652/correlation-between-apparent-diffusion-coefficient-adc-and-cellularity-is-different-in-several-tumors-a-meta-analysis
#7
Alexey Surov, Hans Jonas Meyer, Andreas Wienke
The purpose of this meta-analysis was to provide clinical evidence regarding relationship between ADC and cellularity in different tumors based on large patient data. Medline library was screened for associations between ADC and cell count in different tumors up to September 2016. Only publications in English were extracted. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement (PRISMA) was used for the research. Overall, 39 publications with 1530 patients were included into the analysis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938639/spondin2-is-a-new-prognostic-biomarker-for-lung-adenocarcinoma
#8
Xiaopeng Yuan, Tingting Bian, Jian Liu, Honggang Ke, Jia Feng, Qing Zhang, Li Qian, Xiaoli Li, Yifei Liu, Jianguo Zhang
Spondin 2 (SPON2) is a member of the F-spondin superfamily of genes that encode an extracellular matrix protein. SPON2 has been identified by mRNA differential display screening of cancerous and noncancerous lung cell lines in vitro [1], however, its role in pulmonary adenocarcinoma (ADC) patients remains unclear. In our study, we evaluated whether SPON2 can be used as a biomarker for the diagnosis of pulmonary ADC and any association between SPON2 protein levels and clinicopathological characteristics. Firstly, the mRNA levels of SPON2 in pulmonary ADCs and normal adjacent tissue samples were detected by quantitative reverse transcription polymerase chain reaction (qRT-PCR) (n = 60) assay and the expression of SPON2 protein were detected by tissue microarray immunohistochemistry analysis (TMA-IHC) (n = 280)...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938620/pathological-expression-of-tissue-factor-confers-promising-antitumor-response-to-a-novel-therapeutic-antibody-sc1-in-triple-negative-breast-cancer-and-pancreatic-adenocarcinoma
#9
Xuesai Zhang, Qingrou Li, Hui Zhao, Lanping Ma, Tao Meng, Jianchang Qian, Rui Jin, Jingkang Shen, Ker Yu
The pathological presence of tissue factor (TF) in cancer cells promotes tumor-initiated thrombosis and cancer metastasis. We found that TF is aberrantly present in large percentage of aggressive triple negative breast cancer (TNBC) and pancreatic adenocarcinoma (PaC), two most lethal forms of malignancy that urgently need effective treatment. TF expression in TNBC clustered with higher levels of vimentin, basal-type keratins KRT5/14 and caveolin-1 but lower levels of luminal-type biomarkers. We developed a novel and specific anti-TF therapeutic antibody SC1, which displayed an exceedingly high potency against TF extracellular domain (EC50: 0...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937757/resonant-inelastic-x-ray-scattering-amplitudes-and-cross-sections-in-the-algebraic-diagrammatic-construction-intermediate-state-representation-adc-isr-approach
#10
Dirk Robert Rehn, Andreas Dreuw, Patrick Norman
A scheme has been derived and implemented to gain computational access to the full electronic part of the Kramers-Heisenberg-Dirac (KHD) expression for resonant and nonresonant inelastic scattering amplitudes. Our implementation of this scheme is based on the complex polarization propagator in the algebraic diagrammatic construction (ADC) framework and within its intermediate state representation (ISR). The hierarchy of the second- and third-order ADC/ISR computational schemes known as ADC(2), ADC(2)-x, and ADC(3/2) is considered, and the calculated resonant inelestic X-ray scattering (RIXS) amplitudes and transition strengths for water are in excellent agreement with recent experimental data...
September 22, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28937482/diffusion-tensor-imaging-of-lumbar-vertebras-in-female-adolescent-idiopathic-scoliosis-initial-findings
#11
Dongmei Wang, Shoufeng Wang, Yao Gao, Zhengyang Zhou, Jian He
OBJECTIVE: The purpose of this study was to characterize diffusion tensor imaging (DTI) features of lumbar vertebras in adolescent idiopathic scoliosis (AIS) patients. METHODS: Fifty-two AIS patients and 20 healthy volunteers underwent 3-T magnetic resonance scanning including DTI sequence. The fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values on the convex and concave sides of lumbar vertebras were obtained and compared. RESULTS: The FA and ADC values differed significantly between the convex and concave side of lumbar vertebras in AIS (P < 0...
September 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28937274/visualization-of-the-lumbar-nerve-using-reduced-field-of-view-diffusion-tensor-imaging
#12
Yawara Eguchi, Hirohito Kanamoto, Sumihisa Orita, Kazuhide Inage, Kazuki Fujimoto, Yasuhiro Shiga, Koki Abe, Masahiro Inoue, Hideyuki Kinoshita, Koji Matsumoto, Yoshitada Masuda, Masao Koda, Yasuchika Aoki, Yasuhiro Oikawa, Kazuhisa Takahashi, Seiji Ohtori, Takeo Furuya, Atsuya Watanabe
OBJECTIVE: We investigated high resolution diffusion tensor imaging (DTI) of lumbar nerves with reduced field-of-view (rFOV) using 3-Tesla MRI. METHODS: DTI measured with rFOV was compared with conventional FOV (cFOV) 3.0 T MRI in 5 healthy volunteers and 10 patients with degenerative lumbar disorders. The intracanal, foramina, and extraforamina of the L5 nerve were established as the regions-of-interest (ROI) and fractional anisotropy (FA) values and apparent diffusion coefficient (ADC) values were measured...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28937266/statistical-analysis-of-adcs-and-clinical-biomarkers-in-detecting-acute-renal-transplant-rejection
#13
Elizabeth Hollis, Mohamed Shehata, Mohamed Abou El-Ghar, Mohammed Ghazal, Tarek Eldiasty, Michael Merchant, Andrew E Switala, Ayman El-Baz
OBJECTIVE: To determine which parameters are correlated with transplanted kidney status in patients who have undergone kidney transplantation and can be used for early assessment of acute renal rejection. METHODS: The study included 16 patients with stable renal allografts (Group 1) and 37 patients with rejected allografts (Group 2), determined by renal biopsy post transplantation. All patients' kidneys were evaluated using diffusion-weighted MRI (DW-MRI), in which both clincal and MRI-derived biomarkers were integrated...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28936581/exploring-methods-for-comparing-the-real-world-effectiveness-of-treatments-for-osteoporosis-adjusted-direct-comparisons-versus-using-patients-as-their-own-control
#14
Linda Karlsson, Johan Mesterton, Maurille Feudjo Tepie, Michele Intorcia, Jetty Overbeek, Oskar Ström
Using Swedish and Dutch registry data for women initiating bisphosphonates, we evaluated two methods of comparing the real-world effectiveness of osteoporosis treatments that attempt to adjust for differences in patient baseline characteristics. Each method has advantages and disadvantages; both are potential complements to clinical trial analyses. PURPOSE: We evaluated methods of comparing the real-world effectiveness of osteoporosis treatments that attempt to adjust for both observed and unobserved confounding...
September 21, 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28934377/the-environmental-acinetobacter-baumannii-isolate-dsm30011-reveals-clues-into-the-preantibiotic-era-genome-diversity-virulence-potential-and-niche-range-of-a-predominant-nosocomial-pathogen
#15
Guillermo D Repizo, Alejandro M Viale, Vítor Borges, María M Cameranesi, Najwa Taib, Martín Espariz, Céline Brochier-Armanet, João Paulo Gomes, Suzana P Salcedo
Acinetobacter baumannii represents nowadays an important nosocomial opportunistic pathogen whose reservoirs outside the clinical setting are obscure. Here, we traced the origins of the collection strain A. baumannii DSM30011 to an isolate first reported in 1944, obtained from the enriched microbiota responsible of the aerobic decomposition of the resinous desert shrub guayule. Whole-genome sequencing and phylogenetic analysis based on core genes confirmed DSM30011 affiliation to A. baumannii. Comparative studies with 32 complete A...
September 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28932698/quantitative-magnetic-resonance-mr-neurography-for-evaluation-of-peripheral-nerves-and-plexus-injuries
#16
REVIEW
Teodoro Martín Noguerol, Rafael Barousse, Mariano Socolovsky, Antonio Luna
Traumatic conditions of peripheral nerves and plexus have been classically evaluated by morphological imaging techniques and electrophysiological tests. New magnetic resonance imaging (MRI) studies based on 3D fat-suppressed techniques are providing high accuracy for peripheral nerve injury evaluation from a qualitative point of view. However, these techniques do not provide quantitative information. Diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) are functional MRI techniques that are able to evaluate and quantify the movement of water molecules within different biological structures...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28932564/assessment-of-pulmonary-microstructural-changes-by-hyperpolarized-129-xe-diffusion-weighted-imaging-in-an-elastase-instilled-rat-model-of-emphysema
#17
Ke Wang, Ting Pan, Hao Yang, Weiwei Ruan, Jianping Zhong, Guangyao Wu, Xin Zhou
BACKGROUND: The purpose of this study was to explore the feasibility of hyperpolarized (129)Xe diffusion-weighted imaging (DWI) for the evaluation of pulmonary microstructural changes in the presence of pancreatic porcine elastase (PPE)-induced pulmonary emphysema rat model. METHODS: Sixteen male Sprague-Dawley (SD) rats were randomly divided into two groups, the emphysema model group and control group. Experimental emphysematous models were made by instilling elastase into rat lungs of model group, the control group were instilled with isodose saline...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932362/clinical-radiological-pathological-correlation-of-cavernous-sinus-hemangioma-incremental-value-of-diffusion-weighted-imaging
#18
Abhishek Mahajan, Vedula Rajni Kanth Rao, Gudipati Anantaram, Ashwin M Polnaya, Sandeep Desai, Paresh Desai, Rammohan Vadapalli, Manas Panigrahi
AIM: To elucidate the clinical, magnetic resonance imaging (MRI), pathological features of these lesions and asses the incremental value of diffusion-weighted imaging (DWI) in diagnosing them. METHODS: Fifteen consecutive patients (11 females and 4 males; mean age 40.93 years; age range 13-63 years) with cavernous sinus hemangiomas (CSH) who underwent examination between November 2008 and May 2016 were included for the analysis. MRI, clinical and surgical findings of each patient was retrospectively reviewed...
August 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28931046/clinical-relevance-of-histologic-subtypes-in-locally-advanced-esophageal-carcinoma-treated-with-pre-operative-chemoradiotherapy-experience-of-a-monographic-oncologic-centre
#19
Maria Saigí, Marc Oliva, Luisa Aliste, Mariona Calvo, Gloria Hormigo, Òlbia Serra, Anna Boladeras, Leandre Farran, Javier Robles, Gloria Creus, Ma José Paúles, Joan B Gornals, Eugenia de Lama, Josep Ma Borràs, Núria Sala, Maica Galán
BACKGROUND: Locally advanced esophageal carcinoma (LAEC) represents less than 30% of all diagnosed esophageal carcinoma worldwide. The standard of care for resectable tumours consists of preoperative chemoradiotherapy (CRT) followed by surgery. Despite the curative intent, the prognosis is still poor mainly due to relapse. A multidisciplinary approach is required in order to optimize the therapeutic strategy and follow-up. Differences in outcomes between the two main histological subtypes, adenocarcinoma (ADC) and squamous cell carcinoma (SCC), have been reported...
2017: PloS One
https://www.readbyqxmd.com/read/28930805/the-value-of-diffusion-weighted-imaging-in-combination-with-conventional-magnetic-resonance-imaging-for-improving-tumor-detection-for-early-cervical-carcinoma-treated-with-fertility-sparing-surgery
#20
Xiulei Li, Ling Wang, Yong Li, Peiji Song
OBJECTIVE: This study aimed to investigate the value of diffusion-weighted imaging (DWI) in combination with conventional magnetic resonance imaging (MRI) for improving tumor detection in young patients treated with fertility-sparing surgery because of early cervical carcinoma. METHODS: Fifty-four patients with stage Ia or Ib1 cervical carcinoma were enrolled into this study. Magnetic resonance examinations were performed for these patients using conventional MRI (including T1-weighted imaging, T2-weighted imaging, and dynamic contrast-enhanced MRI) and DWI...
October 2017: International Journal of Gynecological Cancer
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