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Journal of Biomedical Nanotechnology

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https://www.readbyqxmd.com/read/29463380/metronidazole-loaded-polyethyleneimine-and-chitosan-based-liquid-crystalline-system-for-treatment-of-staphylococcal-skin-infections
#1
Francesca Damiani Victorelli, Giovana Maria Fioramonti Calixto, Matheus Aparecido Dos Santos Ramos, Taís Maria Bauab, Marlus Chorilli
Staphylococcus aureus is a common gram-positive bacterium of the human skin microbiota. It is also a dangerous pathogen that can cause serious and even lethal skin infections. The topical administration of metronidazole via nanotechnology-based drug delivery systems, such as liquid crystalline systems, can modulate both the drug permeation and activity, decreasing its side effects and increasing the drug potent activity against the gram-positive bacteria. This study aimed at: (1) structurally developing and characterizing a liquid crystalline systems composed of chitosan and polyethyleneimine dispersion as the aqueous phase, oleic acid as the oily phase, and ethoxylated and propoxylated cetyl alcohol as the surfactant (FPC) for metronidazole incorporation (0...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463379/peptidomic-analysis-of-female-reproductive-tract-secretion-to-identify-putative-anti-infection-peptides-in-the-female-genital-system-via-nanotechnologies
#2
Lina Yan, Ting Luan, Quan Hua, Yun Gu, Ziyi Fu, Xia Liu, Minghui Li, Chengxin Liu, Ping Li, Xin Zeng
The female genital system infections have high-incidence among various gynecological diseases. The role of endogenous peptides in female reproductive tract secretion has been rarely investigated regarding gynecological infections. To identify gynecological infections associated endogenous peptides, a comparative peptidomic profiling of vaginal secretion from sexually mature and perimenopause women was conducted in this study using nanoflow liquid chromatography-tandem mass spectrometer. A total of 3096 peptide fragments originating from 1364 precursor proteins were identified, 102 of which were discrepantly expressed, which included 60 over-expressed peptides and 42 under-expressed peptides in the sexually mature group compared with the perimenopause group...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463378/single-nucleotide-polymorphism-genotyping-of-exos-in-pseudomonas-aeruginosa-using-dual-color-fluorescence-hybridization-and-magnetic-separation
#3
Yongjun Tang, Zeeshan Ali, Jianguo Dai, Xiaolong Liu, Yanqi Wu, Zhu Chen, Nongyue He, Song Li, Lijun Wang
Pseudomonas aeruginosa exoS gene contains important replacement (non-synonymous) single-nucleotide polymorphism (SNP) loci, of which mutations in loci 162 (G162A) and 434 (G434C) in exoS greatly affects virulence. The present study aimed to develop an SNP-based classification method for exoS loci (G162A and G434C), using magnetic enrichment polymerase chain reaction, magnetic separation, and dual-color fluorescence to provide a technical basis for understanding the T3SS genotypic variation. The two SNP loci in 3 P...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463377/a-portable-multi-channel-turbidity-system-for-rapid-detection-of-pathogens-by-loop-mediated-isothermal-amplification
#4
Zhu Chen, Tong Yang, Haowen Yang, Taotao Li, Libo Nie, Xianbo Mou, Yan Deng, Nongyue He, Zhiyang Li, Lijun Wang, Song Li
This study aimed at developing a portable multi-channel turbidity system (21 cm in length, 15.5 cm in width and 11.5 cm in depth) by real-time loop-mediated isothermal amplification (LAMP) method for rapid detection of pathogens. The developed system herein includes temperature control unit, photoelectric detection unit, turbidity calibration unit, power management unit, human machine unit, communication unit and ARM-based microcontroller. The coefficient of variation for eight channels is less than 0.25% in noise analysis...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463376/ciclosporin-a-as-a-reversal-agent-against-concurrent-multidrug-resistance-in-tumors-with-nanobubbles
#5
Shuang Ding, Nishant Patel, Haijun Zhang
The purpose of this work was to challenge the multidrug resistance (MDR) in tumor through nanobubbles (NB) co-loaded reversal agent and chemotherapeutic drug layer by layer. The core/shell NB structure contains Doxorubicin (Dox) as anticancer drug in the core and Ciclosporin A (CsA), a cyclic polypeptide composed of 11 amino acids, as a reversal agent in the shell. The drug was designed to work against concurrent MDR processes and was defined as CsA/Dox/NB. HL60/ADM cells with typical high expression of multidrug resistance associated protein 1 (MRP1) were assessed by flow cytometer, 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays, and Western blot analysis to observe the in vitro and in vivo anticancer efficacy and reversal ability of MDR...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463375/poly-lactic-co-glycolic-acid-polycaprolactone-nanofibrous-membranes-for-high-efficient-capture-of-nano-and-microsized-particulate-matter
#6
Wenshi Xu, Mengyu Guo, Jing Liu, Yating Xiao, Guoqiang Zhou, Ying Liu, Chunying Chen
The incidence of many diseases is closely related to air pollution. Suspended particulate matter of different sizes represents a major source of environmental pollution. Fine particles, especially ultrafine particles smaller than 2.5 μm, might be more harmful to human health because of their extremely small size, which enables them to penetrate human lungs and bronchi and makes them difficult to filter out. Therefore, the fatal risks associated with PM call for the development of air purification materials with high efficiency and low resistance...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463374/nano-vesicles-are-a-potential-tool-to-monitor-therapeutic-efficacy-of-carbon-ion-radiotherapy-in-prostate-cancer
#7
Qi Yu, Ping Li, Meilin Weng, Shuang Wu, Yafang Zhang, Xue Chen, Qing Zhang, Guangxia Shen, Xianting Ding, Shen Fu
Exosomes are nano-vesicles that contribute to the effectiveness of many treatments. The aim of this study was to identify profiles of microRNA (miRNA) contained in serum exosomes that are differentially regulated in patients with prostate cancer undergoing carbon ion radiotherapy (CIRT). RNA was extracted from serum exosomes of eight patients with localized prostate cancer before and after CIRT, and miRNA was analyzed by the next generation sequencing. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis showed that the major signaling pathways associated with the proliferation of prostate cancer cells, such as MAPK, PI3K-AKT, mTOR, and AMPK may be implicated in the mechanism of CIRT action...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463373/novel-application-of-cell-penetrating-r11-peptide-for-diagnosis-of-bladder-cancer
#8
Yiqing Du, Lei Wang, Weiyi Wang, Ting Guo, Mengzhao Zhang, Pu Zhang, Yanning Zhang, Kaijie Wu, Axing Li, Xinyang Wang, Jiankang He, Jinhai Fan
OBJECTIVE: As a novel cell-permeable peptide, polyarginine (R11) showed great potential as contrast agent to target bladder cancer (BCa) for therapeutic applications. However, its diagnostic ability and uptake efficiency between BCa and normal bladder tissues is unknown. In this study, we investigated the feasibility of R11 conjugated with fluorescein isothiocyanate (FITC-R11) for detecting BCa in clinical practice. METHOD: FITC-R11 was synthesized and incubated with BCa cell lines (T24, 5637, RT4), normal immortalized human bladder epithelial cell line (SVHUC) and clinical specimens from BCa and benign prostate hyperplasia patients...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463372/one-step-synthesis-of-dna-templated-water-soluble-au-ag-bimetallic-nanoclusters-for-ratiometric-fluorescence-detection-of-dna
#9
Taotao Li, Huan Yi, Yuan Liu, Zunliang Wang, Shiquan Liu, Nongyue He, Hongna Liu, Yan Deng
DNA strands have been used as templates to form different sized silver nanoclusters. Although DNA templated silver nanoclusters (NCs) probes which show outstanding fluorescence properties have been widely applied in chemical sensing and cellular imaging, synthesis of DNA template Au-Ag bimetallic nanoclusters remains a challenge. A facile one-step synthesis method was thus developed in this study to form Au-Ag NCs using C4-ATAT-C4 as template. C4-ATAT-C4 acted as a stabilizer for preventing aggregation of the Au-Ag NCs...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463371/enhanced-in-vitro-and-in-vivo-anticancer-properties-by-using-a-nanocarrier-for-co-delivery-of-antitumor-polypeptide-and-curcumin
#10
Mengjiao Qi, Shaohua Zou, Chunjing Guo, Kaili Wang, Yueming Yu, Feng Zhao, Huaying Fan, Zimei Wu, Wanhui Liu, Daquan Chen
In this paper, a novel pH and redox dual-sensitive nanocarrier loaded with curcumin (Cur) and anticancer polypeptide (AP) was developed for dual targeting mitochondrial and CD44 receptor. The amphiphilic block copolymer was prepared by triphenylphosphonium (TPP)/oligomeric hyaluronic acid (oHA)/disulfide-menthone 1,2-glycerol ketal (SM), hereinafter referred to as TPP-oHSM. The TPP targeted the mitochondria, pH/redox dual-sensitive SM served as a hydrophobic part, and the CD44 receptor targeting oHA worked as a hydrophilic part...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463370/exchangeability-of-fitc-sio%C3%A2-nanoparticles-between-cancer-cells-increases-the-range-of-drug-delivery
#11
Guoying Deng, Zizheng Wu, Feng Zhou, Chenyun Dai, Jingpeng Zhao, Yingjie Kang, Qian Wang, Xijian Liu, Yin Wang, Qiugen Wang
Drug delivery system studies aim to improve nanoparticle (NP) formulation to enable efficient delivery of NPs to tumors. However, NPs must be transported by blood or through direct injection. How NPs leave the circulatory system and how NPs diffuse into a tumor remain unclear, and this uncertainty is a limitation of drug delivery systems. The intimate connection between these questions and metabolism may be related to their biosafety in vivo. Thus, in this study, classical carrier SiO2 NPs were used as typical transport NPs, and fluorescein isothiocyanate (FITC) was used as the representative drug and tracer...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463369/glycyrrhetinic-acid-modified-norcantharidin-nanoparticles-for-active-targeted-therapy-of-hepatocellular-carcinoma
#12
Heng Zhang, Yu Jiang, XiaoLing Ni, LongXia Chen, Min Wu, Jing Liu, Bo Yang, Xu Shan, LingLin Yang, Juan Fan, Yue Chen, JingBo Wu, ShaoZhi Fu
Norcantharidin (NCTD), the demethylated analogue of cantharidin, has been confirmed to have a good anti-tumor effect against hepatocellular carcinoma (HCC). However, its use is limited by its poor water solubility and low tumortargeting efficacy. In the present study, an active-targeted drug delivery nanoplatform was designed to deliver NCTD using a glycyrrhetinic acid (GA)-decorated copolymer (mPEG-PCL-PEI-GA, MPG). The NCTD-loaded polymeric nanoparticles (MPG/NCTD) formed by self-assembly in water exhibited a mean hydrodynamic diameter of roughly 89 nm...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463368/preparation-and-biocompatibility-evaluation-of-peg-pll-rgd-peg-dspe-phospholipid-cap-nanoparticles
#13
Jingwen Huang, Xiangyu Zhang, Zhihao Wu, Yufeng Wu, Xiaojie Wu, Yunguang Wang, Hao Jiang, Jing Ma, Zelai He
(Arginine-Glycine-Aspartic)-methoxy polyethylene glycol-(1,2-distearoyl-sn-glycero-3-phosphoethanolaMine-N) (abbreviation: RGD-PEG2000-DSPE or RGD-PD) was successfully synthesized and verified by 1H-NMR and MALDI-TOF MS. Polyethylene glycol-poly-L-lysine/RGD-PD/phospholipid/calcium phosphate nanoparticles (PEG-PLL/RGD-PD/PL/CaP NPs or MNPs) were prepared using a novel, simple method conducted at room temperature. Transmission electron microscopy (TEM) analysis showed that the MNPs were spheres of uniform size, with a diameter of ∼30 nm, and smooth surface...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463367/an-evaluation-of-graphene-as-a-multi-functional-heating-element-for-biomedical-applications
#14
George Anagnostopoulos, Emanuele Treossi, John Parthenios, Konstantinos Papagelis, Vincenzo Palermo, Costas Galiotis
Graphene has been found to be an excellent heat-conductor due to the high speed of acoustic phonons in its lattice. In this work, we examine in depth a commercial graphene-based waist protector which uses graphene as a heating element. By employing thermal imaging in tandem with Raman microscopy, the thermal characteristics and performance of this device is fully assessed. It will be shown that no pronounced variation in its function is observed up to 3 hours of continuous operation and that the device seems to work effectively as an IR emitter at low power consumption...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463366/the-interplay-between-nanoparticles-and-neutrophils
#15
Ming-Hsien Lin, Chwan-Fwu Lin, Shih-Chun Yang, Chi-Feng Hung, Jia-You Fang
The employment of nanoparticles has markedly increased in recent years for different applications such as aerospace technology, electronics, biology, and medicine. The exposure of nanoparticles to humans is inevitable nowadays. Neutrophils act as the predominant phagocytic cells for first-line defense to be recruited to an inflammatory site against xenobiotics. It is important to explore how neutrophils interact with nanoparticles to elicit immune responses. Different types of nanoparticles have been studied to reveal a potential interaction to neutrophils in vitro and in vivo...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463365/immunosensors-based-on-nanomaterials-for-detection-of-tumor-markers
#16
Yuxuan Lai, Lijun Wang, Yuan Liu, Gaojian Yang, Congli Tang, Yan Deng, Song Li
Nanomaterials have been widely used to immobilize biomolecules, amplify the signals and concentrate the analytes for detection with good properties including large surface area, good adsorption capacity and high surface activity. In recent years, nanomaterials such as carbon nanomaterials, noble metal nanomaterials, polymers, are widely applied to research and develop immunosensors with high sensitivity and selectivity, which monitor the antigen-antibody reaction for the detection of tumor markers. This review provides an introduction of immunosensors and focuses on the design of electrochemical (EC) immunosensors, electrochemical luminscence (ECL) immunosensors and photoelectrochemical (PEC) immunosensors based on nanomaterials in nearly three years...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463364/cutting-edge-protein-and-carbohydrate-based-materials-for-anticancer-drug-delivery
#17
Rasheed Ahmad, Yan Deng, Ravina Singh, Mubashir Hussain, Muhammad Ali Abdullah Shah, Sauli Elingarami, Nongyue He, Yueming Sun
Materials derived from biological sources not only offer biocompatibility but also adjust with the disease for elongated treatments and more effective therapies. These materials can be utilized as building blocks to construct state of the art drug delivery vehicles like nanoparticles, hydrogels, and nanofibers capable of dramatically enhancing the therapeutic efficiency in cancer treatment. New emerging trends in drug delivery design are constantly reported in recent literature using carbohydrates like cellulose, chitosan, and alginate and proteins like albumin, collagen, gelatin, and zein...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29463363/natural-single-domain-antibody-nanobody-a-novel-concept-in-the-antibody-field
#18
Cui Li, Zhuoran Tang, Zixi Hu, Yiwei Wang, Xiaomei Yang, Fengzhen Mo, Xiaoling Lu
Since the serendipitous discovery of heavy-chain antibodies in Camelidae 20 years ago, the smallest single-domain antigen-binding fragment, known as VHH or nanobody, has received growing attention. In comparison with traditional antibodies, VHHs performs equally high specificity and affinity and low toxicity to targets, and has the ability to inhibit the formation of enzymes and enter the receptor gap. Hence, VHHs has been recently regarded as the highly valued protein and applied in multiple fields, including fundamental research, diagnosis, therapeutics, food science, etc...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29104516/fluorescence-microscopy-imaging-calibration-for-quantifying-nanocarrier-binding-to-cells-during-shear-flow-exposure
#19
Abhay Ranganathan, Jessica Campo, Jacob Myerson, Vladimir Shuvaev, Blaine Zern, Vladimir Muzykantov, David M Eckmann
Targeted drug delivery is a fast growing industry in healthcare and technologies are being developed for applications utilizing nanocarriers as vehicles for drug transport. As the size scale of these particles becomes further reduced, advanced fluorescence microscopy and image analysis techniques become increasingly important for facilitating our understanding of nanocarrier binding and avidity, thereby establishing the basis for nanocarrier design optimization. While there is a significant body of published work using nanocarriers in vitro and in vivo, the advent of smaller particles that have typically been studied (~500 nm) limits the ability to attain quantitative measurements of nanocarrier binding dynamics since image acquisition and analysis methods are restricted by microscopy pixel size...
June 2017: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29388752/iron-oxide-nanoparticles-synergize-with-erlotinib-to-suppress-refractory-non-small-cell-lung-cancer-cell-proliferation-through-the-inhibition-of-erbb-pi3k-akt-and-pten-activation
#20
Meili Zhang, Buqing Sai, Pengfei Cao, Zheng Li, Liyang Zhang, Cijun Shuai, Xinye Wang, Jia Wang, Guiyuan Li, Juanjuan Xiang, Jingqun Tang
Non-small cell lung cancer (NSCLC) accounts for 85% of lung cancer cases. EGFR tyrosine kinase inhibitors (EGFR-TKIs) such as erlotinib and gefitinib, are currently approved for the management of NSCLC. However, primary and acquired resistances to EGFR-TKIs are the major obstacles in the treatment of NSCLC. These resistances have been associated with the development of secondary mutations in EGFR or continued oncogenic signaling despite TKI treatment. In this study, NSCLC cells with wild-type EGFR, A549, H460, H358, H157 which do not respond to EGFR-TKIs, were used...
April 2017: Journal of Biomedical Nanotechnology
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