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Agarose gel

Janne H Ylärinne, Chengjuan Qu, Mikko J Lammi
Numerous biomaterials are being considered for cartilage tissue engineering, while scaffold-free systems have also been introduced. Thus, it is important to know do the scaffolds improve the formation of manufactured neocartilages. This study compares scaffold-free cultures to two scaffold-containing ones. Six million bovine primary chondrocytes were embedded in HyStem™ or HydroMatrix™ scaffolds, or suspended in scaffold-free chondrocyte culture medium, and then loaded into agarose gel supported culture well pockets...
April 2017: Journal of Materials Science. Materials in Medicine
A Chatterjea, V L LaPointe, A Barradas, H Garritsen, H Yuan, A Renard, C A van Blitterswijk, J de Beor
The amount of bone generated using current tissue engineering approaches is insufficient for many clinical applications. Previous in vitro studies suggest that culturing cells as 3D aggregates can enhance their osteogenic potential, but the effect on bone formation in vivo is unknown. Here, we use agarose wells to generate uniformly sized mesenchymal stromal cell (MSC) aggregates. When combined with calcium phosphate ceramic particles and a gel prepared from human platelet-rich plasma, we generated a tissue engineered construct which significantly improved in vivo bone forming capacity as compared to the conventional system of using single cells seeded directly on the ceramic surface...
February 15, 2017: European Cells & Materials
Wen-Lu Fan, Zi-Wei Wang, Yue Qin, Chao Sun, Zhong-Mei Liu, Yan-Ping Jiang, Xin-Yuan Qiao, Li-Jie Tang, Yi-Jing Li, Yi-Gang Xu
In this study, a specific and sensitive method for simultaneous detection of human astrovirus, human rotavirus, norovirus, sapovirus and enteric adenovirus associated with acute enteritis was developed, based on the specific dual priming oligonucleotide (DPO) system and the sensitive high-performance liquid chromatography (HPLC) analysis. The DPO system-based multiplex reverse transcription-polymerase chain reaction (RT-PCR) combined with HPLC assay was more sensitive than agarose gel electrophoresis analysis and real-time SYBR Green PCR assay, and showed a specificity of 100% and sensitivity of 96%-100%...
February 6, 2017: Journal of Virological Methods
Zubeda Shahwani, Abdul Aleem, Nazeer Ahmed, Muhammad Mushtaq, Sarwat Afridi
OBJECTIVE: To establish a polymerase chain reaction method based on 18S ribosomal ribonucleic acid gene for the detection of plasmodium deoxyribonucleic acid in patients suffering from malaria symptoms. METHODS: This cross-sectional study was conducted from September 2013 to October 2014 in district Quetta of Pakistan's Balochistan province. Blood samples were collected from patients suffering from general symptoms of malaria. A polymerase chain reaction-based technique was applied for the diagnosis of malaria and detection of responsible species in the patients who were suspected to carry the parasite...
December 2016: JPMA. the Journal of the Pakistan Medical Association
Caitlin A Evans, Sasha R Lanyon, Michael P Reichel
Effective control and the eventual eradication of Bovine viral diarrhea virus (BVDV) from cattle populations depend on the accurate identification of infected animals. Although typically a disease agent of cattle, BVDV is known to infect a wide variety of nonbovine species, including sheep. However, validation of serologic tests in these nonbovine species, particularly sheep, is lacking. We analyzed 99 sheep sera (57 samples from Pestivirus-naive sheep, and 42 samples from BVDV-inoculated sheep) in order to investigate 3 serologic tests: the agarose gel immunodiffusion (AGID) and 2 commercial enzyme-linked immunosorbent assays (ELISAs) for detection of BVDV antibodies...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
Zahra Asadi, Neda Nasrollahi, Hamidreza Karbalaei-Heidari, Vaclav Eigner, Michal Dusek, Nabiallah Mobaraki, Roya Pournejati
Two water-soluble mono-nuclear macrocyclic lanthanum(III) complexes of 2,6-diformyl-4-methylphenol with 1,3-diamino-2-propanol (C1) or 1,3-propylenediamine (C2) were synthesized and characterized by UV-Vis, FT-IR, (13)C and (1)H NMR spectroscopy and elemental analysis. C1 complex was structurally characterized by single-crystal X-ray diffraction, which revealed that the complex was mononuclear and ten-coordinated. The coordination sites around lanthanum(III) were occupied with a five-dentate ligand, two bidentate nitrates, and one water molecule...
January 21, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Xueqi Chen, Meng Liu, Rongfu Wang, Ping Yan, Chunli Zhang, Chao Ma, Lei Yin
(1) Background: The great potential of RNA interference (RNAi)-based gene therapy is premised on the effective delivery of small interfering RNAs (siRNAs) to target tissues and cells. Hence, we aimed at developing and examining a novel integrin αvβ₃-specific delivery carrier for targeted transfection of siRNA to malignant tumor cells; (2) Methods: Arginine-glycine-aspartate motif (RGD) was adopted as a tissue target for specific recognition of integrin αvβ₃. To enable siRNA binding, a chimeric peptide was synthesized by adding nonamer arginine residues (9R) at the carboxy terminus of cyclic-RGD dimer, designated as c(RGD)₂-9R...
February 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Biao Ma, Jiehong Fang, Ye Wang, Haizhen He, Mingyan Dai, Wei Lin, Wei Su, Mingzhou Zhang
BACKGROUND: Cervical cancer is a common gynecologic malignant tumor and has a great impact on women's health. Human papillomavirus (HPV) is implicated in cervical cancer and precancerous lesions and the two are possibly two stages of disease progression. With the technological development of molecular biology and epidemiology, detection and treatment of HPV has become an important means to prevent cervical cancer. METHODS: Here we present a novel, rapid, sensitive and specific isothermal method of recombinase polymerase amplification (RPA), which is established to detect the two most common high-risk human papillomavirus type 16 and type 18 DNA...
January 1, 2017: Clinical Laboratory
Mamoru Satoh, Shigetsugu Takano, Kazuyuki Sogawa, Kenta Noda, Hideyuki Yoshitomi, Masumi Ishibashi, Kaoru Mogushi, Hirotaka Takizawa, Masayuki Otsuka, Hiroaki Shimizu, Masaru Miyazaki, Fumio Nomura
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal malignancies. To improve its outcome, the reliable biomarkers are urgently needed. In this study, we aimed to elucidate the key molecules involved in PDAC progression using proteomics approaches. First, we performed two-dimensional electrophoresis to identify the proteins overexpressed in PDAC tissues. Following the analysis of agarose gel spots, cofilin-1 were identified and verified as a candidate protein commonly upregulated in PDAC tissues...
February 4, 2017: Cancer Science
Da-Bo Zhou, Shao-Gang Wang, Shao-Ping Wang, Hong-Jun Ai, Jian Xu
Magnetic resonance imaging (MRI) compatibility of three early transition metal (ETM) based alloys was assessed in vitro with agarose gel as a phantom, including Zr-20Nb, near-equiatomic (TiZrNbTa)90 Mo10 and Nb-60Ta-2Zr, together with pure tantalum and L605 Co-Cr alloy for comparison. The artifact extent in the MR image was quantitatively characterized according to the maximum area of 2D images and the total volume in reconstructed 3D images with a series of slices under acquisition by fast spin echo (FSE) sequence and gradient echo (GRE) sequence...
February 3, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Ismael Segura-Ulate, Barbara Yang, Javier Vargas-Medrano, Ruth G Perez
Multiple system atrophy (MSA) is a demyelinating neurodegenerative disorder characterized by accumulation of aggregated α-synuclein (aSyn) inside oligodendrocyte precursors, mature oligodendroglia, and neurons. MSA dysfunction is associated with loss of trophic factor production by glial and neuronal cells. Here, we report that recombinant wild type human aSyn uptake by OLN-93, an oligodendroglia cell-line, reduced brain-derived neurotrophic factor (BDNF) expression. Furthermore, OLN-93 cells stably transfected with human wild type or an MSA-associated mutant aSyn, A53E that produces neuronal and glial inclusions, reduced BDNF mRNA to nearly unmeasurable qPCR levels...
January 31, 2017: Neuropharmacology
Angel Belles, Claire Alary, Yann Aminot, James W Readman, Christine Franke
A passive sampler inspired from previous devices was developed for the integrative sampling of a broad range of contaminants in the water column. Our primary objective was to improve the performance of the device to provide accurate and averaged pollutant water concentrations. For this purpose, an agarose diffusive gel was used as the boundary layer that drives the analyte uptake rate. Contrary to conventional passive samplers, the developed device does not require the sampling rates to be corrected for exposure conditions (e...
April 1, 2017: Talanta
Marta J Woźniak-Budych, Łucja Przysiecka, Krzysztof Langer, Barbara Peplińska, Marcin Jarek, Maciej Wiesner, Grzegorz Nowaczyk, Stefan Jurga
The antimicrobial properties of copper and rifampicin-loaded copper nanoparticles were investigated using four strains: Staphylococcus aureus, Escherichia coli, Bacillus pumilis and Pseudomonas fluorescens. Spherical-shaped copper nanoparticles were synthesized via green reduction method from the peppermint extract. It was found that adsorption of rifampicin on the copper nanosurface enhances its biological activity and prevents the development of resistance. The interactions between rifampicin-copper nanoparticles and bacteria cells were monitored using atomic force microscopy (AFM) and confocal laser scanning microscopy (CLSM)...
March 2017: Journal of Materials Science. Materials in Medicine
Dmitry Kryndushkin, Natalia Pripuzova, Frank P Shewmaker
Amyloid fibers are large and extremely stable structures that can resist denaturation by strong anionic detergents, such as sodium dodecyl sulfate or sarkosyl. Here, we present two complementary analytical methods that exploit these properties, enabling the isolation and characterization of amyloid/prion aggregates. The first technique, known as semidenaturating detergent agarose gel electrophoresis, is an immunoblotting technique, conceptually similar to conventional western blotting. It enables the targeted identification of large detergent-resistant protein aggregates using antibodies specific to the protein of interest...
February 1, 2017: Cold Spring Harbor Protocols
Nida Rehmani, Atif Zafar, Hussain Arif, Sheikh Mumtaz Hadi, Altaf A Wani
Oxidative DNA damage has been implicated in the pathogenesis of neurological disorders, cancer and ageing. Owing to the established link between labile copper concentrations and neurological diseases, it is critical to explore the interactions of neurotransmitters and drug supplements with copper. Herein, we investigate the pro-oxidant DNA damage induced by the interaction of L-DOPA and dopamine (DA) with copper. The DNA binding affinity order of the compounds has been determined by in silico molecular docking...
January 27, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
Chima P Chukwuemeka, Jann Cupp, Jonathan R Sanders
BACKGROUND: Fibrin clot formation, which acts to stabilize a wound following injury, is among the key early aspects of dermal wound healing. This preliminary matrix is eventually degraded via a process known as fibrinolysis and replaced with a collagen-rich matrix that continues to be remodeled to minimize scarring. Disruptions in these carefully coordinated events lead to certain undesirable conditions such as fibrosis and the formation of abnormal scars that are associated with excess amounts of collagen...
January 23, 2017: Wounds: a Compendium of Clinical Research and Practice
Aydın Deveci, Ahmet Yılmaz Çoban, Belma Durupınar
Deaths related with human immunodeficiency virus (HIV) infections have been decreased by the introduction of combined anti-retroviral therapy (ART) into the clinical practice. Combined ART usually consists of two nucleoside/nucleotide analogs reverse transcriptase inhibitors (NRTI) that is called backbone and a third drug that belongs to either non-nucleoside/nucleotide reverse transcriptase inhibitors (NNRTI), protease inhibitors (PI), integrase strand transfer inhibitors (INSTI) or entry inhibitors. During abacavir therapy which is a member of NRTI, hypersensitivity reactions can occur approximately 4-9% of the patients that lead difficulties for the management of HIV infections...
October 2016: Mikrobiyoloji Bülteni
Ibtesam Ghadban Auda, Israa M S Al-Kadmy, Sawsan Mohammed Kareem, Aliaa Khyuon Lafta, Mustafa Hussein Obeid A'Affus, Ibrahim Abd Aloahd Khit, Abdulaziz Abdullah Al Kheraif, Darshan Devang Divakar, Ravikumar Ramakrishnaiah
<em>Pseudomonas aeruginosa</em> is a major cause of nosocomial infection in children and adults, resultingin significant morbidity and mortality due to its ability to acquire drug resistance. The ability of <em>P. aeruginosa</em> in the environment to cause infection in individuals has been reported previously; henceforth, surveillance of the emergence and transmission of <em>P. aeruginosa</em> strains among patients is important for infection control in a clinical setup...
November 30, 2016: Journal of AOAC International
Awanish Kumar, Alexander M Klibanov
The problem of gelation of concentrated protein solutions, which poses challenges for both downstream protein processing and liquid formulations of pharmaceutical proteins, is addressed herein by employing previously discovered viscosity-lowering bulky salts. Procainamide-HCl and the salt of camphor-10-sulfonic acid with L-arginine (CSA-Arg) greatly retard gelation upon heating and subsequent cooling of the model proteins gelatin and casein in water: Whereas in the absence of additives the proteins form aqueous gels within several hours at room temperature, procainamide-HCl for both proteins and also CSA-Arg for casein prevent gel formation for months under the same conditions...
January 23, 2017: Applied Biochemistry and Biotechnology
Lingxiang Jiang, Steve Granick
We characterize the porosity of hydrogels by imaging the displacement trajectories of embedded tracer particles. This offers the possibility of characterizing the size and projected shape of individual pores as well as direct, real-space maps of heterogeneous porosity and its distribution. The scheme shows that when fluorescent spherical particles treated to avoid specific adsorption are loaded into the gel, their displacement trajectories from Brownian motion report on the size and projected shape in which the pore resides, convoluted by the particle size...
January 24, 2017: ACS Nano
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