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https://www.readbyqxmd.com/read/29786899/improved-stable-indocyanine-green-icg-mediated-cancer-optotheranostics-with-naturalized-hepatitis-b-core-particles
#1
Wenjun Shan, Ronghe Chen, Qiang Zhang, Jie Zhao, Binbin Chen, Xi Zhou, Shefang Ye, Shengli Bi, Liming Nie, Lei Ren
In recent years, hepatitis B core protein virus-like particle (HBc VLP) is an impressive biomaterial, which has attracted considerable attention due to favorable properties such as structural stability, high uptake efficiency, and biocompatibility in biomedical applications. Heretofore, only a few attempts have been made to apply it in physical, chemical, and biological therapy for cancer. In this study, a tumor-targeting RGD-HBc VLP is first fabricated through genetic engineering. For image-guided cancer phototherapy, indocyanine green (ICG) is loaded into RGD-HBc VLP via a disassembly/reassembly pathway and electrostatic attraction with high efficiency...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29785759/effect-of-2-94-%C3%A2%C2%B5m-er-yag-laser-on-the-chemical-composition-of-hard-tissues
#2
Abtesam Aljdaimi, Hugh Devlin, Mark Dickinson, Abdullatif Alfutimie
The aim was to investigate the effect of the Er-YAG laser radiation on morphology and chemical composition of enamel, dentin, and bone. The specimens of the three groups were irradiated with a very long pulse mode (VLP) of 2.94 µm Er-YAG laser with 100 mJ pulse energy and energy density of 8.42 J/ cm2 for 30 s, at a repetition rate of 15 Hz. The organic and inorganic content of the samples were investigated by Fourier Transforms Infrared spectroscopy (FTIR). The morphological characteristics were investigated with scanning electron microscopy (SEM) and elemental analysis (calcium and phosphorus) with energy-dispersive X-ray spectroscopy (EDX)...
May 21, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29712887/short-course-versus-long-course-chemoradiotherapy-for-stage-ie-iie-extranodal-natural-killer-t-cell-lymphoma-nasal-type-a-multicenter-retrospective-study
#3
Jin Li, Yajun Li, Meizuo Zhong, Xianling Liu, Yinghui Song, Jiwei Li, Kunlun Li, Pingyong Yi
BACKGROUND This study compared clinical outcomes and adverse events between L-asparaginase/pegaspargase-based short-course and long-course chemoradiotherapy in newly diagnosed stage IE-IIE extranodal natural killer/T cell lymphoma, nasal type (ENKTL). MATERIAL AND METHODS Patients were categorized into a short-course (2-4 chemotherapy cycles, median: 4, n=153) and long-course group (5-6 cycles, median: 6, n=83). The chemotherapy regimens included GELOX, SMILE, and VLP. The radiotherapy dose was 40-63 Gy (median: 55 Gy)...
May 1, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29695428/electrostatic-interactions-between-hendra-virus-matrix-proteins-are-required-for-efficient-virus-like-particle-assembly
#4
Yu Chih Liu, Julian Grusovin, Timothy E Adams
Hendra virus (HeV) is a zoonotic paramyxovirus belonging to the genus Henipavirus. HeV is highly pathogenic, and it can cause severe neurological and respiratory illnesses in both humans and animals, with an extremely high mortality rate of up to 70%. Amongst the genes that HeV encodes, the matrix (M) protein forms an integral part of the virion structure and plays critical roles in coordinating viral assembly and budding. Nevertheless, the molecular mechanism of this process is not fully elucidated. Here, we determined the crystal structure of HeV M to 2...
April 25, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29568866/incorporation-of-cd40-ligand-enhances-the-immunogenicity-of-tumor%C3%A2-associated-calcium-signal-transducer-2-virus%C3%A2-like-particles-against-lung-cancer
#5
Wang Xi, Dong Ke, Long Min, Wang Lin, Zuo Jiahui, Lin Fang, Gao Zhaowei, Zhang Zhe, Chen Xi, Zhang Huizhong
The cell surface glycoprotein Trop‑2 is overexpressed in various types of cancer, including in lung cancer, and has recently been used as an effective immunotherapeutic target. CD40 ligand (CD40L), a tumor necrosis factor superfamily member, is a promising immune adjuvant. Human immunodeficiency virus (HIV) gag‑based virus‑like particles (VLPs) are highly immunogenic, and foreign antigens can be incorporated onto their membrane envelope for cancer vaccine development. In the present study, a HIV gag‑based VLP strategy and Bac‑to‑Bac system were utilized to construct Trop‑2, CD40L and gag recombinant baculoviruses, which were then used to infect TN5 cells in order to form Trop‑2 VLPs or Trop‑2‑CD40L VLPs...
March 15, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29510206/classification-and-structural-insight-into-vibriolysin-like-proteases-of-vibrio-pathogenicity
#6
JiaFeng Huang, BingQi Zeng, Dan Liu, RiBang Wu, Jiang Zhang, BinQiang Liao, HaiLun He, Fei Bian
Vibriolysin-like proteases (VLPs) are important virulence agents in the arsenal of Vibrio causing instant cytotoxic effects during infection. Most of Vibrio secreted VLPs show serious pathogenicity, while some species of Vibrio with VLPs are non-pathogenic, like Vibrio tasmaniensis and Vibrio pacinii. To investigate the relation between VLPs and Vibrio pathogenicity, one phylogenetic tree of VLPs was constructed and compared consensus sequences at the N-terminus of VLPs. Based on these results, VLPs were defined into nine phylogenetic clades...
April 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29385705/analysis-of-3d-scan-measurement-distribution-with-application-to-a-multi-beam-lidar-on-a-rotating-platform
#7
Jesús Morales, Victoria Plaza-Leiva, Anthony Mandow, Jose Antonio Gomez-Ruiz, Javier Serón, Alfonso García-Cerezo
Multi-beam lidar (MBL) rangefinders are becoming increasingly compact, light, and accessible 3D sensors, but they offer limited vertical resolution and field of view. The addition of a degree-of-freedom to build a rotating multi-beam lidar (RMBL) has the potential to become a common solution for affordable rapid full-3D high resolution scans. However, the overlapping of multiple-beams caused by rotation yields scanning patterns that are more complex than in rotating single beam lidar (RSBL). In this paper, we propose a simulation-based methodology to analyze 3D scanning patterns which is applied to investigate the scan measurement distribution produced by the RMBL configuration...
January 30, 2018: Sensors
https://www.readbyqxmd.com/read/29074234/development-of-a-rapid-and-quantitative-method-for-the-analysis-of-viral-entry-and-release-using-a-nanoluc-luciferase-complementation-assay
#8
Michihito Sasaki, Paulina D Anindita, Wallaya Phongphaew, Michael Carr, Shintaro Kobayashi, Yasuko Orba, Hirofumi Sawa
Subviral particles (SVPs) self-assemble and are released from cells transfected with expression plasmids encoding flavivirus structural proteins. Flavivirus-like particles (VLPs), consisting of flavivirus structural proteins and a subgenomic replicon, can enter cells and cause single-round infections. Neither SVPs or VLPs possess complete viral RNA genomes, therefore are replication-incompetent systems; however, they retain the capacity to fuse and bud from target cells and follow the same maturation process as whole virions...
January 2, 2018: Virus Research
https://www.readbyqxmd.com/read/29067022/soil-viral-communities-vary-temporally-and-along-a-land-use-transect-as-revealed-by-virus-like-particle-counting-and-a-modified-community-fingerprinting-approach-frapd
#9
Anja Narr, Ali Nawaz, Lukas Y Wick, Hauke Harms, Antonis Chatzinotas
Environmental surveys on soil viruses are still rare and mostly anecdotal, i. e., they mostly report on viruses at one location or for only a few sampling dates. Detailed time-series analysis with multiple samples can reveal the spatio-temporal dynamics of viral communities and provide important input as to how viruses interact with their potential hosts and the environment. Such surveys, however, require fast, easy-to-apply and reliable methods. In the present study we surveyed monthly across 13 months the abundance of virus-like particles (VLP) and the structure of the viral communities in soils along a land use transect (i...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29031660/lichen-planus-affecting-the-female-genitalia-a-retrospective-review-of-patients-at-mayo-clinic
#10
Caoimhe M R Fahy, Rochelle R Torgerson, Mark D P Davis
BACKGROUND: Genital or vulval lichen planus (VLP) may have a disabling effect on a patient's quality of life. Evidence-based management guidelines are lacking for VLP. OBJECTIVE: We sought to review clinical presentation and treatment of patients who received a diagnosis of VLP. METHODS: The 100 consecutive patients who received a diagnosis of VLP at Mayo Clinic between January 1, 1997, and December 31, 2015, were reviewed retrospectively...
December 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28949131/heparin-binding-to-an-engineered-virus-like-nanoparticle-antagonist
#11
Ho Yong Cheong, Myles Groner, Kevin Hong, Brennen Lynch, William R Hollingsworth, Zinaida Polonskaya, Jin-Kyu Rhee, Michael M Baksh, M G Finn, Andrew J Gale, Andrew K Udit
The anticoagulant activity of heparin administered during medical interventions must be reversed to restore normal clotting, typically by titrating with protamine. Given the acute toxicity associated with protamine, we endeavored to generate safer heparin antagonists by engineering bacteriophage Qβ virus-like particles (VLPs) to display motifs that bind heparin. A particle bearing a single amino acid change from wild-type (T18R) was identified as a promising candidate for heparin antagonism. Surface potential maps generated through molecular modeling reveal that the T18R mutation adds synergistically to adjacent positive charges on the particle surface, resulting in a large solvent-accessible cationic region that is replicated 180 times over the capsid...
December 11, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28921433/large-scale-transient-transfection-of-suspension-mammalian-cells-for-vlp-production
#12
Laura Cervera, Amine A Kamen
Large-scale transient transfection of mammalian cell suspension cultures enables the production of biological products in sufficient quantity and under stringent quality attributes to perform accelerated in vitro evaluations and has the potential to support preclinical or even clinical studies. Here we describe the methodology to produce VLPs in a 3L bioreactor, using suspension HEK 293 cells and PEIPro as a transfection reagent. Cells are grown in the bioreactor to 1 × 10(6) cells/mL and transfected with a plasmid DNA-PEI complex at a ratio of 1:2...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28893480/production-of-highly-immunogenic-virus-like-particles-of-bovine-papillomavirus-type-6-in-silkworm-pupae
#13
Satoko Watanabe, Tetsuya Iizuka, Shinichi Hatama, Toru Kanno, Masaji Mase, Tomoyuki Shibahara
Bovine papillomaviruses (BPVs) are the causative agent of bovine teat papillomatosis, which can lead to severe economic losses in dairy cattle. Among the 14 identified BPV genotypes, BPV type 6 (BPV6) is the most frequently detected in teat papilloma lesions, and is therefore thought to play a major role in teat papillomatosis. To develop an effective vaccine against BPV6 infection, we produced virus-like particles of BPV6 (BPV6-VLP) in silkworm (Bombyx mori) pupae and purified these by heparin affinity chromatography using a single column...
October 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28876928/md-simulations-of-viruslike-particles-with-supra-cg-solvation-affordable-to-desktop-computers
#14
Matı As R Machado, Humberto C González, Sergio Pantano
Viruses are tremendously efficient molecular devices that optimize the packing of genetic material using a minimalistic number of proteins to form a capsid or envelope that protects them from external threats, being also part of cell recognition, fusion, and budding machineries. Progress in experimental techniques has provided a large number of high-resolution structures of viruses and viruslike particles (VLP), while molecular dynamics simulations may furnish lively and complementary insights on the fundamental forces ruling viral assembly, stability, and dynamics...
October 10, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28842921/development-of-high-throughput-and-high-sensitivity-capillary-gel-electrophoresis-platform-method-for-western-eastern-and-venezuelan-equine-encephalitis-wevee-virus-like-particles-vlps-purity-determination-and-characterization
#15
Deepika Gollapudi, Diane L Wycuff, Richard M Schwartz, Jonathan W Cooper, K C Cheng
In this paper, we describe development of a high-throughput, highly sensitive method based on Lab Chip CGE-SDS platform for purity determination and characterization of virus-like particle (VLP) vaccines. A capillary gel electrophoresis approach requiring about 41 s per sample for analysis and demonstrating sensitivity to protein initial concentrations as low as 20 μg/mL, this method has been used previously to evaluate monoclonal antibodies, but this application for lot release assay of VLPs using this platform is unique...
October 2017: Electrophoresis
https://www.readbyqxmd.com/read/28841998/quantitation-and-biospecific-identification-of-virus-like-particles-of-human-papillomavirus-by-capillary-electrophoresis
#16
Virginie Bettonville, Jérôme T J Nicol, Tania Furst, Nicolas Thelen, Géraldine Piel, Marc Thiry, Marianne Fillet, Nathalie Jacobs, Anne-Catherine Servais
Capillary electrophoresis (CE) for HPV-VLP quantitation is a very interesting alternative technique compared to those currently used in viral analysis, such as SDS-PAGE, Western blot or protein assay that are destructive and semi-quantitative or non specific. In this study, the quantitative performance of the CE method was evaluated. A main issue in virus quantitation is the absence of reference material. Therefore, the concentration of a HPV16-VLP sample produced in the laboratory was determined using ELISA with Gardasil® , after adjuvant dissolution, as reference material and conformational H16...
December 1, 2017: Talanta
https://www.readbyqxmd.com/read/28754559/enzymatic-cleavage-promotes-disassembly-of-gii-3-norovirus-virus-like-particles-and-its-binding-to-salivary-histo-blood-group-antigens
#17
Yuqi Huo, Wenhui Wang, Lijun Zheng, Xuhui Chen, Shuo Shen, Mingchen Wang
In this study, we found that addition of fecal extract significantly promoted the binding of GII.3 NoV VLPs to salivary HBGAs. SDS-PAGE analysis indicated that major capsid proteins (VP1) were cleaved into two major bands with molecular weights of 26 and 31kD, respectively. Pretreatment of fecal extract by boiling or addition of protease inhibitor cocktail or type specific protease inhibitor (leupeptin and aprotinin) during incubation all decreased VP1 cleavage and its binding to salivary HBGAs. Trypsin digestion led to cleavage of VP1 and promoted its binding to HBGAs, suggesting that the active enzyme(s) might be trypsin or trypsin-like enzymes...
August 15, 2017: Virus Research
https://www.readbyqxmd.com/read/28753950/perturbation-of-human-t-cell-leukemia-virus-type-1-particle-morphology-by-differential-gag-co-packaging
#18
José O Maldonado, Isaac Angert, Sheng Cao, Serkan Berk, Wei Zhang, Joachim D Mueller, Louis M Mansky
Human T-cell leukemia virus type 1 (HTLV-1) is an important cancer-causing human retrovirus that has infected approximately 15 million individuals worldwide. Many aspects of HTLV-1 replication, including virus particle structure and assembly, are poorly understood. Group-specific antigen (Gag) proteins labeled at the carboxy terminus with a fluorophore protein have been used extensively as a surrogate for fluorescence studies of retroviral assembly. How these tags affect Gag stoichiometry and particle morphology has not been reported in detail...
July 19, 2017: Viruses
https://www.readbyqxmd.com/read/28725500/volar-plate-fixation-in-patients-older-than-70-years-with-ao-type-c-distal-radial-fractures-clinical-and-radiologic-outcomes
#19
Nicolas S Piuzzi, Ezequiel E Zaidenberg, Matias Pereira Duarte, Jorge G Boretto, Agustin Donndorff, Gerardo Gallucci, Pablo De Carli
Introduction  Treatment of unstable distal radial fractures (DRFs) in elderly patients is controversial, and considering the increasing life expectancy, their appropriate treatment is of growing importance. Our aim was to analyze the clinical and radiologic outcomes in the elderly patients with AO type C DRF treated with volar locking plate (VLP). Materials and Methods  Between 2007 and 2011, 572 DRFs were operated on in our hospital with open reduction and internal fixation with VLP. Of these, only 64 patients (66 DRFs) met the selection criteria (AO type C DRF, age > 70 years, minimum 12-month follow-up)...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28578190/correlation-between-dynamic-light-scattering-and-size-exclusion-high-performance-liquid-chromatography-for-monitoring-the-effect-of-ph-on-stability-of-biopharmaceuticals
#20
Medhat A Al-Ghobashy, Moushira M Mostafa, Heba S Abed, Faten A Fathalla, Maissa Y Salem
Aggregate formation is a major problem affecting both safety and efficacy of biopharmaceuticals and is associated with protein immunogenicity. Size exclusion high performance liquid chromatography (SE-HPLC) has always been the gold standard technique for detection and determination of protein aggregates. However, large protein aggregates may be filtered off and build up on top of the column leading to deterioration in column performance. Moreover, low-affinity protein aggregates may dissociate during analysis and thus not detected...
August 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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