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Fahimeh Charbgoo, Mojgan Nejabat, Khalil Abnous, Fatemeh Soltani, Seyed Mohammad Taghdisi, Mona Alibolandi, W Thomas Shier, Terry W J Steele, Mohammad Ramezani
Gold nanoparticles (AuNPs) have attracted great attention in biomedical fields due to their unique properties. However, there are few reports on clinical trial of these nanoparticles. In vivo, AuNPs face complex biological fluids containing abundant proteins, which challenge the prediction of their fate that is known as "bio-identity". These proteins attach onto the AuNPs surface forming protein corona that makes the first step of nano-bio interface and dictates the subsequent AuNPs fate. Protein corona formation even stealth active targeting effect of AuNPs...
February 28, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
Ran Chen, Jim E Riviere
Quantitative analysis of the interactions between nanomaterials and their surrounding environment is crucial for safety evaluation in the application of nanotechnology as well as its development and standardization. In this chapter, we demonstrate the importance of the adsorption of surrounding molecules onto the surface of nanomaterials by forming biocorona and thus impact the bio-identity and fate of those materials. We illustrate the key factors including various physical forces in determining the interaction happening at bio-nano interfaces...
2017: Advances in Experimental Medicine and Biology
Si-Ming Yu, Laura Gonzalez-Moragas, Maria Milla, Androniki Kolovou, Rachel Santarella-Mellwig, Yannick Schwab, Anna Laromaine, Anna Roig
UNLABELLED: Nanoparticles which surface adsorb proteins in an uncontrolled and non-reproducible manner will have limited uses as nanomedicinal products. A promising approach to avoid nanoparticle non-specific interactions with proteins is to design bio-hybrids by purposely pre-forming a protein corona around the inorganic cores. Here, we investigate, in vitro and in vivo, the newly acquired bio-identity of superparamagnetic iron oxide nanoparticles (SPIONs) upon their functionalization with a pre-formed and well-defined bovine serum albumin (BSA) corona...
October 1, 2016: Acta Biomaterialia
Sunita Malik, Deepika Pannu, Shashi Prateek, Renuka Sinha, Harsha Gaikwad
PURPOSE: To compare symptomatic response in Indian women using different estrogen preparations for treatment of menopausal symptoms. METHODOLOGY: A randomized, single blind, four arm, parallel assignment study was conducted in VMMC and SJH, New Delhi, India. 200 Indian menopausal women were recruited and assigned into four treatment groups viz., estradiol valerate (E2V), conjugated equine estrogen (CEE), isoflavones and Placebo group. The statistical significance of categorical variables was determined by Chi-square, Fisher's exact test...
June 2016: Archives of Gynecology and Obstetrics
Sergey A Dzugan, Konstantine S Dzugan
OBJECTIVE: In 2002 we suggested a new hypothesis of migraine. This hypothesis implies that migraine is a consequence of a loss of neurohormonal and metabolic integrity. The goal of this clinical analysis is to present the evaluation of the effect of a multimodal treatment program in migraine management. MATERIAL AND METHODS: We evaluated 30 patients ages 16-66 with migraine who were treated with a multimodal treatment program. All patients received a complex program which included: hormonorestorative therapy (HT) with bio-identical hormones; correction of balance between sympathetic and parasympathetic systems and simultaneously calcium/magnesium balance; "resetting" the pineal gland; improvement of intestinal absorption through restoration of normal intestinal flora, and a cleanse from parasitic infestation (if necessary)...
2015: Neuro Endocrinology Letters
Nicolas Lepareur, Loleh Leal E Costa, Maëva Bocqué, Clément Blondelle, Clément Ruello, Marie Desjulets, Nicolas Noiret, Sandrine Cammas-Marion
INTRODUCTION: Encapsulation of biologically active molecules into nanoparticles (NPs), for site-specific delivery, is a fast growing area. These NPs must be biocompatible, non-toxic, and able to release their load in a controlled way. We have developed a series of NPs based on (bio)degradable and biocompatible poly(malic acid) derivatives, poly(benzyl malate) (PMLABe), with its PEG-grafted stealth analog and target-specific biotin-PEG-b-PMLABe one. A lipophilic radiotracer has then been encapsulated into these NPs...
2015: Frontiers in Medicine
Morteza Azhdarzadeh, Amir Ata Saei, Shahriar Sharifi, Mohammad J Hajipour, Alaaldin M Alkilany, Mohammad Sharifzadeh, Fatemeh Ramazani, Sophie Laurent, Alireza Mashaghi, Morteza Mahmoudi
As research progresses, nanoparticles (NPs) are becoming increasingly promising tools for medical diagnostics and therapeutics. Despite this rise, their potential risks to human health, together with environmental issues, has led to increasing concerns regarding their use. As such, a comprehensive understanding of the interactions that occur at the nano-bio interface is required in order to design safe, reliable and efficient NPs for biomedical applications. To this end, extensive studies have been dedicated to probing the factors that define various properties of the nano-bio interface...
2015: Nanomedicine
Valentina Colapicchioni, Martina Tilio, Luca Digiacomo, Valentina Gambini, Sara Palchetti, Cristina Marchini, Daniela Pozzi, Sergio Occhipinti, Augusto Amici, Giulio Caracciolo
When nanoparticles (NPs) are dispersed in a biofluid, they are covered by a protein corona the composition of which strongly depends on the protein source. Recent studies demonstrated that the type of disease has a crucial role in the protein composition of the NP corona with relevant implications on personalized medicine. Proteomic variations frequently occur in cancer with the consequence that the bio-identity of NPs in the blood of cancer patients may differ from that acquired after administration to healthy volunteers...
June 2016: International Journal of Biochemistry & Cell Biology
W Y Xuan, Y Zhang, Z Q Liu, D Feng, M Y Luo
Aleurites moluccana L. is grown as a roadside tree in southern China and the oil content of its seed is higher than other oil plants, such as Jatropha curcas and Camellia oleifera. A. moluccana is considered a promising energy plant because its seed oil could be used to produce biodiesel and bio-jet fuel. In addition, the bark, leaves, and kernels of A. moluccana have various medical and commercial uses. Here, a novel gene coding the biotin carboxyl carrier protein subunit (BCCP) was cloned from A. moluccana L...
2015: Genetics and Molecular Research: GMR
Nathalie A Roussel, Hedwig Neels, Kevin Kuppens, Marijke Leysen, Eric Kerckhofs, Jo Nijs, Anneke J Beetsma, C Paul Van Wilgen
PURPOSE: Despite the increasing evidence that illness perceptions should be addressed in patients, there is a lack of studies evaluating whether physiotherapists question illness perceptions. This study, using a mixed-methods design, investigates the integration of illness perceptions during the first consultation of physiotherapists treating patients with low back pain (LBP). METHODS: Thirty-four physiotherapists performed usual history taking in a patient with non-specific LBP...
2016: Disability and Rehabilitation
J V Caetano, M Percin, B W van Oudheusden, B Remes, C de Wagter, G C H E de Croon, C C de Visser
An accurate knowledge of the unsteady aerodynamic forces acting on a bio-inspired, flapping-wing micro air vehicle (FWMAV) is crucial in the design development and optimization cycle. Two different types of experimental approaches are often used: determination of forces from position data obtained from external optical tracking during free flight, or direct measurements of forces by attaching the FWMAV to a force transducer in a wind-tunnel. This study compares the quality of the forces obtained from both methods as applied to a 17...
October 2015: Bioinspiration & Biomimetics
Alexandra M Greiner, Franziska Klein, Tetyana Gudzenko, Benjamin Richter, Thomas Striebel, Bayu G Wundari, Tatjana J Autenrieth, Martin Wegener, Clemens M Franz, Martin Bastmeyer
Bio-functionalized three-dimensional (3D) structures fabricated by direct laser writing (DLW) are structurally and mechanically well-defined and ideal for systematically investigating the influence of three-dimensionality and substrate stiffness on cell behavior. Here, we show that different fibroblast-like and epithelial cell lines maintain normal proliferation rates and form functional cell-matrix contacts in DLW-fabricated 3D scaffolds of different mechanics and geometry. Furthermore, the molecular composition of cell-matrix contacts forming in these 3D micro-environments and under conventional 2D culture conditions is identical, based on the analysis of several marker proteins (paxillin, phospho-paxillin, phospho-focal adhesion kinase, vinculin, β1-integrin)...
November 2015: Biomaterials
Zuzana Benková, M Natália D S Cordeiro
Tuning of surface properties plays an important role in applications ranging from material engineering to biomedicine/chemistry. The interactions of chains grafted to a solid support and exposed to a matrix of chemically identical chains represent an intriguing issue. In this work, the behavior of poly(ethylene oxide) (PEO) chains grafted irreversibly onto an amorphous silica and immersed in the matrix of free PEO chains of different polymerization degree is studied using molecular dynamics simulations. The density distributions of grafted and free PEO chains, the height of the grafted layer, overlap parameters, and orientation order parameters depend not only on the grafting density but also on the length of free chains which confirm the entropic nature of the interactions between the grafted and free chains...
September 22, 2015: Langmuir: the ACS Journal of Surfaces and Colloids
Heerajnarain Bulluck, Steven K White, Stefania Rosmini, Anish Bhuva, Thomas A Treibel, Marianna Fontana, Amna Abdel-Gadir, Anna Herrey, Charlotte Manisty, Simon M Y Wan, Ashley Groves, Leon Menezes, James C Moon, Derek J Hausenloy
BACKGROUND: Whether T1-mapping cardiovascular magnetic resonance (CMR) can accurately quantify the area-at-risk (AAR) as delineated by T2 mapping and assess myocardial salvage at 3T in reperfused ST-segment elevation myocardial infarction (STEMI) patients is not known and was investigated in this study. METHODS: 18 STEMI patients underwent CMR at 3T (Siemens Bio-graph mMR) at a median of 5 (4-6) days post primary percutaneous coronary intervention using native T1 (MOLLI) and T2 mapping (WIP #699; Siemens Healthcare, UK)...
August 12, 2015: Journal of Cardiovascular Magnetic Resonance
Amira Abdel Motaal, Hesham El-Askary, Sara Crockett, Olaf Kunert, Basma Sakr, Sherif Shaker, Alice Grigore, Radu Albulescu, Rudolf Bauer
BACKGROUND: Balanites aegyptiaca Del. (Zygophyllaceae) fruits are used to treat hyperglycemia in Egyptian folk medicine and are sold by herbalists in the Egyptian open market for this purpose. Nevertheless, the fruits have not yet been incorporated into pharmaceutical dosage forms. The identity of the bioactive compounds and their possible mechanisms of action were not well understood until now. PURPOSE: Aldose reductase inhibitors are considered vital therapeutic and preventive agents to address complications caused by hyperglycemia...
August 15, 2015: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Patricia Rodriguez-Maciá, Arnab Dutta, Wolfgang Lubitz, Wendy J Shaw, Olaf Rüdiger
The active site of hydrogenases has been a source of inspiration for the development of molecular catalysts. However, direct comparisons between molecular catalysts and enzymes have not been possible because different techniques are used to evaluate both types of catalysts, minimizing our ability to determine how far we have come in mimicking the enzymatic performance. The catalytic properties of the [Ni(P(Cy) 2 N(Gly) 2 )2 ](2+) complex with the [NiFe]-hydrogenase from Desulfovibrio vulgaris immobilized on a functionalized electrode were compared under identical conditions...
October 12, 2015: Angewandte Chemie
Tatiana Brambilla, Barbara Fiamengo, Corrado Tinterri, Alberto Testori, Massimo Maria Grassi, Amedeo Sciarra, Tommaso Abbate, Wolfgang Gatzemeier, Massimo Roncalli, Luca Di Tommaso
Sentinel lymph node (SLN) examination is a standard in breast cancer patients, with several methods employed along its 20 years history, the last one represented by one-step nucleic acid amplification (OSNA). The latter is a intra-operative molecular assay searching for CK19 mRNA as a surrogate of metastatic cells. Our 3 years experience with OSNA (1122 patients) showed results overlapping those recorded in the same institution with a morphological evaluation (930 patients) of SLN. In detail, the data of OSNA were almost identical to those observed with standard post-operative procedure in terms of patients with positive SLN (30%) and micrometastatic/macrometastatic involvement of SLN (respectively, 38-45 and 62-55%)...
2015: Frontiers in Medicine
L Ren, W D Robertson, R Reimer, C Heinze, C Schneider, D Eggert, P Truschow, N-O Hansen, P Kroetz, J Zou, R J D Miller
The prospect for spatial imaging with mass spectroscopy at the level of the cell requires new means of cell extraction to conserve molecular structure. To this aim, we demonstrate a new laser extraction process capable of extracting intact biological entities with conserved biological function. The method is based on the recently developed picosecond infrared laser (PIRL), designed specifically to provide matrix-free extraction by selectively exciting the water vibrational modes under the condition of ultrafast desorption by impulsive vibrational excitation (DIVE)...
July 17, 2015: Nanotechnology
D Docter, D Westmeier, M Markiewicz, S Stolte, S K Knauer, R H Stauber
Besides the wide use of engineered nanomaterials (NMs) in technical products, their applications are not only increasing in biotechnology and biomedicine, but also in the environmental field. While the physico-chemical properties and behaviour of NMs can be characterized accurately under idealized conditions, this is no longer the case in complex physiological or natural environments. Herein, proteins and other biomolecules rapidly bind to NMs, forming a protein/biomolecule corona that critically affects the NMs' (patho)biological and technical identities...
October 7, 2015: Chemical Society Reviews
Youjun Feng, Ritesh Kumar, Dmitry A Ravcheev, Huimin Zhang
Recently, we determined that BioR, the GntR family of transcription factor, acts as a repressor for biotin metabolism exclusively distributed in certain species of α-proteobacteria, including the zoonotic agent Brucella melitensis and the plant pathogen Agrobacterium tumefaciens. However, the scenario is unusual in Paracoccus denitrificans, another closely related member of the same phylum α-proteobacteria featuring with denitrification. Not only does it encode two BioR homologs Pden_1431 and Pden_2922 (designated as BioR1 and BioR2, respectively), but also has six predictive BioR-recognizable sites (the two bioR homolog each has one site, whereas the two bio operons (bioBFDAGC and bioYB) each contains two tandem BioR boxes)...
August 2015: MicrobiologyOpen
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