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https://www.readbyqxmd.com/read/28634727/safety-and-efficacy-of-chemosaturation-in-patients-with-primary-and-secondary-liver-tumors
#1
Martha M Kirstein, Steffen Marquardt, Nils Jedicke, Silke Marhenke, Wolfgang Koppert, Michael P Manns, Frank Wacker, Arndt Vogel
BACKGROUND: Chemosaturation with percutaneous hepatic perfusion (CS-PHP; hepatic CHEMOSAT(®) delivery system; Delcath Systems Inc, USA) is a novel medical device, which delivers high doses of melphalan directly to the liver in patients with primary and secondary liver tumors while limiting systemic toxicity through hemofiltration of the hepatic venous blood. The aim of this study was to analyze the safety and efficacy of the second-generation CS-PHP after 54 treatments at Hannover Medical School, Germany...
June 20, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28632137/electrospun-silk-polyaniline-conduits-for-functional-nerve-regeneration-in-rat-sciatic-nerve-injury-model
#2
Suradip Das, Manav Sharma, Dhiren Saharia, Kushal Sarma, Elizabeth Muir, Utpal Bora
The present study describes the fabrication of polyaniline-silk fibroin nanocomposite based nerve conduits and its subsequent implantation in a rat sciatic nerve injury model for peripheral nerve regeneration. This is the first in vivo study of polyaniline based nerve conduit describing the safety and efficacy of the conduits in treating peripheral nerve injuries. The nanocomposite was synthesised by electrospinning a mixture of silk fibroin protein and polyaniline wherein the silk nanofibers were observed to be uniformly coated with polyaniline nanoparticles...
June 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28631704/-beh%C3%A3-et-s-disease-intracardiac-thrombosis-a-description-of-two-cases-and-a-review-of-literature
#3
Z S Alekberova, P S Ovcharov, T A Lisitsyna, A V Volkov, T V Popkova
Behçet's disease (BD) is systemic vasculitis of unknown etiology, which is more common in the countries located along the Great Silk Road. The disease is diagnosed if a patient has 4 key diagnostic signs: aphthous stomatitis, genital sores, and eye and skin lesions. Vascular diseases referred to as minor criteria for BD are characterized by the formation of aneurysms and thrombosis, predominantly in the venous bed. In venous disorders, a blood clot can form in any vessel, including caval, cerebral, pulmonary, and other veins...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28630630/roles-of-mesenchymal-stem-cells-in-spinal-cord-injury
#4
REVIEW
Jing Qu, Huanxiang Zhang
Spinal cord injury (SCI) represents one of the most complicated and heterogeneous pathological processes of central nervous system (CNS) impairments, which is still beyond functional regeneration. Transplantation of mesenchymal stem cells (MSCs) has been shown to promote the repair of the injured spinal cord tissues in animal models, and therefore, there is much interest in the clinical use of these cells. However, many questions which are essential to improve the therapy effects remain unanswered. For instance, the functional roles and related molecular regulatory mechanisms of MSCs in vivo are not yet completely determined...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28630405/sex-differences-in-prostaglandin-biosynthesis-in-neutrophils-during-acute-inflammation
#5
Simona Pace, Antonietta Rossi, Verena Krauth, Friederike Dehm, Fabiana Troisi, Rossella Bilancia, Christina Weinigel, Silke Rummler, Oliver Werz, Lidia Sautebin
The severity and course of inflammatory processes differ between women and men, but the biochemical mechanisms underlying these sex differences are elusive. Prostaglandins (PG) and leukotrienes (LT) are lipid mediators linked to inflammation. We demonstrated superior LT biosynthesis in human neutrophils and monocytes, and in mouse macrophages from females, and we confirmed these sex differences in vivo where female mice produced more LTs during zymosan-induced peritonitis versus males. Here, we report sex differences in PG production in neutrophils during acute inflammation...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630206/rapid-and-consistent-evolution-of-colistin-resistance-in-xdr-pseudomonas-aeruginosa-during-morbidostat-culture
#6
Bianca Regenbogen, Matthias Willmann, Matthias Steglich, Boyke Bunk, Ulrich Nübel, Silke Peter, Richard A Neher
Colistin is a last resort antibiotic commonly used against multidrug-resistant strains of Pseudomonas aeruginosa To investigate the potential for in-situ evolution of resistance against colistin and to map the molecular targets of colistin resistance, we exposed two P. aeruginosa isolates to colistin using a continuous culture device known as morbidostat. As a result, colistin resistance reproducibly increased 10-fold within ten days, and 100-fold within 20 days, along with highly stereotypic, yet strain specific mutation patterns...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629858/preparation-characterization-and-antioxidant-activity-of-silk-peptides-grafted-carboxymethyl-chitosan
#7
Meng Liu, Lian Min, Chen Zhu, Ziqie Rao, Liangling Liu, Wenyan Xu, Pengfeng Luo, Lihong Fan
Free radicals are closely related to the occurrence and development of aging, cancer and inflammation, the ability to scavenge free radicals is an important indicator of the antioxidant activity. In this study, we prepared a water soluble, free radical scavenging and biocompatible copolymer for regenerative therapy. Carboxymethyl chitosan (CMC) was modified with silk peptide (SP) by microbial transglutaminase (MTGase), FT-IR and NMR spectroscopy were used to confirm the successful grafting of SP to CMC. The degree of substitution was determined by ultraviolet spectrophotometry...
June 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28629081/optimized-composition-of-nanocomposite-scaffolds-formed-from-silk-fibroin-and-nano-tio2-for-bone-tissue-engineering
#8
N Johari, H R Madaah Hosseini, A Samadikuchaksaraei
Natural silk fibroin (SF) polymer has biomedical and mechanical properties as a biomaterial for bone tissue engineering scaffolds. Freeze-dried porous nanocomposite scaffolds were prepared from silk fibroin and titanium dioxide (TiO2) nanoparticles as a bioactive reinforcing agent by a phase separation method. In order to fabricate SF/TiO2 scaffolds, 5, 10, 15 and 20wt% of the TiO2 were added to the SF. The phase structure, functional groups and morphology of the scaffolds were evaluated using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy techniques, respectively...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629074/tunable-green-graphene-silk-biomaterials-mechanism-of-protein-based-nanocomposites
#9
Fang Wang, S S Jyothirmayee Aravind, Hao Wu, Joseph Forys, Venkat Venkataraman, Kandalam Ramanujachary, Xiao Hu
Green graphene materials prepared by photoreduction of graphite oxide were first time blended with aqueous-based silk fibroin proteins to improve the mechanical and thermal properties of silk biomaterials, and their nanocomposite interaction mechanism was illustrated. Powder X-ray diffraction (XRD) analysis confirmed the complete exfoliation of graphite oxide to graphene in presence of focused pulses of solar radiation. By varying the concentration of graphene (0.1wt% to 10wt%), a series of free standing graphene-silk films were prepared and were systematically characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and nanoindentation measurements...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629038/electrospinning-of-pva-sericin-nanofiber-and-the-effect-on-epithelial-mesenchymal-transition-of-a549-cells
#10
Shanshan Yan, Xiuchun Li, Jing Dai, Yiqun Wang, Binbin Wang, Yi Lu, Jianlin Shi, Pengyu Huang, Jinkang Gong, Yuan Yao
This research aims to investigate the cell-nanomaterial interaction between epithelial-mesenchymal transition of A549 cell and electrospinning nanofibers composed of polyvinyl alcohol (PVA)/silk sericin (SS). The electrospinning of regenerated nanofiber was performed with water as a spinning solvent and glutaraldehyde as a chemical cross-linker. Solution concentration, applied voltage and spin distances as well as other parameters were optimized to generate fine nanofibers with smooth surface in good homogeneity...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629037/regenerated-egg-white-silk-fibroin-composite-films-for-biomedical-applications
#11
Renchuan You, Jie Zhang, Shaojin Gu, Yingshan Zhou, Xiufang Li, Dezhan Ye, Weilin Xu
Protein-based composites have always been desirable biomaterials as they can be fabricated into a wide range of biomaterials with tunable properties, including modulation of mechanical properties and control of cell responses. Both egg white protein (EW) and silk fibroin (SF) are biocompatible, biodegradable, non-toxic and naturally abundant biopolymers. In order to obtain biocompatible composite films with tunable performance, EW and SF were blended at various ratios. Raising the SF ratio in the composite films significantly increased breaking strength, but impaired flexibility...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629024/electrospun-silk-fibroin-scaffolds-coated-with-reduced-graphene-promote-neurite-outgrowth-of-pc-12-cells-under-electrical-stimulation
#12
Salvador Aznar-Cervantes, Ana Pagán, Jose G Martínez, Antonia Bernabeu-Esclapez, Toribio F Otero, Luis Meseguer-Olmo, Juan I Paredes, Jose L Cenis
Novel approaches to neural research require biocompatible materials capable to act as electrode structures or scaffolds for tissue engineering in order to stimulate or restore the functionality of damaged tissues. This work offers promising results that indicate the potential use of electrospun silk fibroin (SF) scaffolds coated with reduced graphene oxide (rGO) in this sense. The coated material becomes conductor and electroactive. A complete characterisation of SF/rGO scaffolds is provided in terms of electrochemistry, mechanical behaviour and chemical conformation of fibroin...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629003/a-simple-semi-quantitative-approach-studying-the-in-vivo-degradation-of-regenerated-silk-fibroin-scaffolds-with-different-pore-sizes
#13
Yongwei Guo, Zhongchun Chen, Jianchuan Wen, Minghui Jia, Zhengzhong Shao, Xia Zhao
The biocompatibility and in vivo degradation rate of biomaterials represent critical control points in the long-term success of scaffolds for tissue restoration. In this study, new three-dimensional (3D) regenerated silk fibroin scaffolds (RSFs) were prepared by the freezing-defrosting procedure, and then were implanted beneath the dorsal skin of rats. This study aims to develop a kinetic semi-quantitative approach to assess in vivo degradation rate and biocompatibility of this kind of RSFs with different pore sizes for the first time, and to evaluate the relationship between the biodegradation and tissue responses by measuring the thickness of residual scaffolds, fibrous capsules and infiltrated tissues through integrated techniques of histology, optical imaging and image analysis...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628998/a-facile-fabrication-of-silk-mos2-hybrids-for-photothermal-therapy
#14
Zhao Li, Yuhong Yang, Jinrong Yao, Zhengzhong Shao, Xin Chen
Photothermal therapy, due to its safety and effectiveness, has attracted tremendous interest in the area of cancer treatment in recent few decades. The emerging of two-dimensional transition metal dichalcogenides has provided this promising therapy with a novel genus of nanomaterials. Herein, we present a facile one-step way to prepare a hybrid of regenerated silk fibroin (RSF) and molybdenum disulfide (MoS2) nanosheets simply by directly adding MoS2 dispersion into RSF aqueous solution to induce the self-assembly of silk protein on the surface of MoS2 flakes...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628927/curcumin-promotes-apoptosis-of-activated-hepatic-stellate-cells-by-inhibiting-protein-expression-of-the-myd88-pathway
#15
Ya-Jun He, Kenny Kuchta, Yan-Mei Deng, Silke Cameron, Yu Lin, Xu-You Liu, Guo-Ron Ye, Xia Lv, Yuta Kobayashi, Jian-Chang Shu
Activation and proliferation of hepatic stellate cells (HSC) play an important role in the progress of liver fibrosis. HSC activation occurs in response to inflammatory cytokines, cellular interactions with immune cells, and morphogenetic signals. The literature hints to a role of the adaptor protein MyD88 in fibrosis. Although curcumin has been shown to exert inhibitory effects on the proliferation of HSC in vitro, its influence on the MyD88 pathway in HSC has remained unclear. Here, we investigated whether curcumin accelerates apoptosis of HSC through the MyD88 pathway...
June 19, 2017: Planta Medica
https://www.readbyqxmd.com/read/28628762/white-matter-microstructure-in-boys-with-persistent-depressive-disorder
#16
Veronika Vilgis, Alasdair Vance, Ross Cunnington, Timothy J Silk
BACKGROUND: Persistent depressive symptoms in children and adolescents are considered a risk factor for the development of major depressive disorder (MDD) later in life. Previous research has shown alterations in white matter microstructure in pediatric MDD but discrepancies exist as to the specific tracts affected. The current study aimed to improve upon previous methodology and address the question whether previous findings of lower fractional anisotropy (FA) replicate in a sample of children with persistent depressive disorder characterized by mild but more chronic symptoms of depression...
June 13, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28628129/high-speed-fixed-target-serial-virus-crystallography
#17
Philip Roedig, Helen M Ginn, Tim Pakendorf, Geoff Sutton, Karl Harlos, Thomas S Walter, Jan Meyer, Pontus Fischer, Ramona Duman, Ismo Vartiainen, Bernd Reime, Martin Warmer, Aaron S Brewster, Iris D Young, Tara Michels-Clark, Nicholas K Sauter, Abhay Kotecha, James Kelly, David J Rowlands, Marcin Sikorsky, Silke Nelson, Daniel S Damiani, Roberto Alonso-Mori, Jingshan Ren, Elizabeth E Fry, Christian David, David I Stuart, Armin Wagner, Alke Meents
We report a method for serial X-ray crystallography at X-ray free-electron lasers (XFELs), which allows for full use of the current 120-Hz repetition rate of the Linear Coherent Light Source (LCLS). Using a micropatterned silicon chip in combination with the high-speed Roadrunner goniometer for sample delivery, we were able to determine the crystal structures of the picornavirus bovine enterovirus 2 (BEV2) and the cytoplasmic polyhedrosis virus type 18 polyhedrin, with total data collection times of less than 14 and 10 min, respectively...
June 19, 2017: Nature Methods
https://www.readbyqxmd.com/read/28626907/controlled-population-based-comparative-study-of-usa-and-international-adult-55-74-neurological-deaths-1989-2014
#18
C Pritchard, E Rosenorn-Lanng, A Silk, L Hansen
OBJECTIVES: A population-based controlled study to determine whether adult (55-74 years) neurological disease deaths are continuing to rise and are there significant differences between America and the twenty developed countries 1989-91 and 2012-14. METHOD: Total Neurological Deaths (TND) rates contrasted against control Cancer and Circulatory Disease Deaths (CDD) extrapolated from WHO data. Confidence intervals compare USA and the other countries over the period...
June 18, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28626408/pd-1-checkpoint-inhibitor-associated-autoimmune-encephalitis
#19
Stephanie Schneider, Silke Potthast, Paul Komminoth, Guido Schwegler, Steffen Böhm
OBJECTIVE: To report first-hand narrative experience of autoimmune encephalitis and to briefly review currently available evidence of autoimmune encephalitis in cancer patients treated with immune checkpoint inhibitors. SETTING: A case study is presented on the management of a patient who developed autoimmune encephalitis during nivolumab monotherapy occurring after 28 weeks on anti-PD-1 monotherapy (nivolumab 3 mg/kg every 2 weeks) for non-small cell lung cancer...
May 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28625835/robust-composite-silk-fibers-pulled-out-of-silkworms-directly-fed-with-nanoparticles
#20
GuoHua Wu, Peng Song, DongYang Zhang, ZeYu Liu, Long Li, HuiMing Huang, HongPing Zhao, NanNan Wang, YanQiu Zhu
This paper reports the impacts of direct feeding silkworms with different nanoparticles (Cu, Fe, and TiO2) on the morphology, structures, and mechanical properties of the resulting silk fiber (SF). The contents of the Cu nanoparticles were 38 times higher in the posterior silk glands and only 2-3 times higher in the SF and in the middle silk glands compared with the controlled groups. Significant changes of the surface morphology, structures, and diameter of the Cu nanoparticle fed SF have been observed, which are attributed to a slight SF protein reconstruction or conformational change in the mixture of silk fibroin and sericin in the silk glands...
June 15, 2017: International Journal of Biological Macromolecules
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