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https://www.readbyqxmd.com/read/28917821/circulatory-cell-mediated-nanotherapeutic-approaches-in-disease-targeting
#1
Thierry Burnouf, Pierre-Alain Burnouf, Yu-Wen Wu, Er-Yuan Chuang, Long-Sheng Lu, Hadi Goubran
Circulating blood cells, and cell-derived microvesicles, are emerging as pragmatic delivery systems that can smartly complement the already existing nanotherapeutic platforms evaluated to treat or diagnose diseases. The valuable distinctive features of circulatory cells over synthetic nanocarriers encompass their biological origin which confers immune transparence, known biodegradability, high drug loading, relatively long half-life and a targeting capacity associated with their physiological surface functionality...
September 14, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28916961/practical-computational-toolkits-for-dendrimers-and-dendrons-structure-design
#2
Nuno Martinho, Liana C Silva, Helena F Florindo, Steve Brocchini, Teresa Barata, Mire Zloh
Dendrimers and dendrons offer an excellent platform for developing novel drug delivery systems and medicines. The rational design and further development of these repetitively branched systems are restricted by difficulties in scalable synthesis and structural determination, which can be overcome by judicious use of molecular modelling and molecular simulations. A major difficulty to utilise in silico studies to design dendrimers lies in the laborious generation of their structures. Current modelling tools utilise automated assembly of simpler dendrimers or the inefficient manual assembly of monomer precursors to generate more complicated dendrimer structures...
September 15, 2017: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/28914553/nanomaterials-as-nanocarriers-a-critical-assessment-why-these-are-multi-chore-vanquisher-in-breast-cancer-treatment
#3
Sania Naz, Hira Shahzad, Attarad Ali, Muhammad Zia
Breast cancer is a group of diseases with various subtypes and leads to high mortality throughout the globe. Various conventional techniques are in practice to cure breast cancer but these techniques are linked with various shortcomings. Mostly these treatments are not site directed and cause toxicity towards normal cells. In order to overcome these issues, we need smart system that can deliver anticancer drugs to specific sites. Targeted drug delivery can be achieved via passive or active drug delivery using nanocarriers...
September 15, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28904834/methionine-mediated-synthesis-of-magnetic-nanoparticles-and-functionalization-with-gold-quantum-dots-for-theranostic-applications
#4
Arūnas Jagminas, Agnė Mikalauskaitė, Vitalijus Karabanovas, Jūrate Vaičiūnienė
Biocompatible superparamagnetic iron oxide nanoparticles (NPs) through smart chemical functionalization of their surface with fluorescent species, therapeutic proteins, antibiotics, and aptamers offer remarkable potential for diagnosis and therapy of disease sites at their initial stage of growth. Such NPs can be obtained by the creation of proper linkers between magnetic NP and fluorescent or drug probes. One of these linkers is gold, because it is chemically stable, nontoxic and capable to link various biomolecules...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28898302/-belief-system-regarding-cannabis-its-use-and-consequences-users-versus-non-users-in-colombian-university-students
#5
Gonzalo Galván, Álvaro Sánchez-Carballo, Ileana Gómez-Morales, Oscar Humánez-Julio, Manuel Guerrero-Martelo, Francisco Vásquez De la Hoz
Descriptive and comparative study of cross-sectional that had as objective to evaluate and compare the beliefs about cannabis, its use and potential consequences between two groups of Colombian university students, matched by gender and age. The frst group consisted of ordinary consumers of cannabis (n=35) the second group consisted of students that have never tried cannabis (n=35). The results showed that the group of consumers presents a moderate risk of abuse and only the 20% fulflled dependence criteria...
November 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28888010/decoration-of-gold-nanoparticles-with-thiolated-ph-responsive-polymeric-peg-b-p-2-dimethylamio-ethyl-methacrylate-co-itaconic-acid-shell-a-novel-platform-for-targeting-of-anticancer-agent
#6
Marjan Ghorbani, Hamed Hamishehkar
The aim of this study was to design and develop a new pH-responsive nano-platform for controlled and targeted delivery of anticancer drugs. Engineering of pH-responsive nanocarriers was prepared via decoration of gold nanoparticles (NPs) by thiolated (methoxy-poly(ethylene glycol)-b-poly((2-dimethylamino) ethyl methacrylate-co-itaconic acid) (mPEG-b-p(DMAEMA-co-IA) copolymer and fully characterized by various techniques and subsequently used for loading and targeted delivery of anticancer agent, methotrexate (MTX)...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28887966/core-shell-structured-polypyrrole-mesoporous-sio2-nanocomposite-capped-with-graphene-quantum-dots-as-gatekeeper-for-irradiation-controlled-release-of-methotrexate
#7
Xiaolin Liu, Dan Shou, Chuanxiang Chen, Huihui Mao, Yong Kong, Yongxin Tao
A core-shell structured nanocomposite of polypyrrole/mesoporous SiO2 (PPy/mSiO2) is rationally designed as the nanocarrier for methotrexate (MTX), a chemotherapeutic drug for cancer treatment. Graphene quantum dots (GQDs) are introduced to the outer surface of PPy/mSiO2, and it functions as a gatekeeper for the loaded MTX through the formation of H-bonds with the functionalized mSiO2. In the proposed nanocarrier for MTX, the mesopores in mSiO2 are beneficial for the accommodation of MTX, resulting in enhanced encapsulation capacity of the nanocarrier; on the other hand, PPy can effectively convert the near-infrared (NIR) light to heat...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28886517/tunable-ph-and-redox-responsive-drug-release-from-curcumin-conjugated-%C3%AE-polyglutamic-acid-nanoparticles-in-cancer-microenvironment
#8
Shameer Pillarisetti, S Maya, S Sathianarayanan, R Jayakumar
Tunable pH and redox responsive polymer was prepared using γ-polyglutamic acid (γ-PGA) with linker 3-mercaptopropionic acid (3-MPA) (γ-PGA_SH) via oxidation to obtain redox responsive disulfide (γ-PGA_SS) backbone and adipic acid dihydrazide (ADH) (γ-PGA_SS_ADH) with hydrazide functional group for pH responsiveness. Further curcumin (Cur) was conjugated through hydrazone bond of the γ-PGA_SS_ADH via Schiff base reaction to obtain (γ-PGA_SS_ADH_Cur). The prepared systems were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, Electrospray ionization quadrupole time-of-flight mass spectrometry (ESI-Qq-TOF-MS/MS) and Solid state nuclear magnetic resonance (SS NMR) techniques...
August 31, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28882918/prevalence-and-clinical-characteristics-of-apparent-therapy-resistant-hypertension-in-patients-with-cardiovascular-disease-a-cross-sectional-cohort-study-in-secondary-care
#9
Esther de Beus, Nicolette G C van der Sande, Michiel L Bots, Wilko Spiering, Michiel Voskuil, Frank L J Visseren, Peter J Blankestijn
OBJECTIVES: Our aim was to investigate the prevalence of apparent therapy-resistant hypertension (aTRH) in patients with clinical manifest cardiovascular disease (CVD), and to study clinical characteristics related to aTRH in this population. SETTING: The SMART (Second Manifestations of ARTerial disease) study is a large, single-centre cohort study in secondary care. PARTICIPANTS: Office blood pressure (BP) at inclusion was used to evaluate BP control in 6191 hypertensive patients with clinical manifest (cardio)vascular disease...
September 6, 2017: BMJ Open
https://www.readbyqxmd.com/read/28882607/efficacy-and-safety-in-frameless-robot-assisted-stereo-electroencephalography-seeg-for-drug-resistant-epilepsy
#10
I Ollivier, C Behr, H Cebula, A Timofeev, M Benmekhbi, M P Valenti, A M Staack, J Scholly, P Kehrli, E Hirsch, F Proust
INTRODUCTION: Stereo-electroencephalography (SEEG) is an invasive procedure, used to identify the epileptogenic zone that can be surgically removed in order to treat drug-resistant epilepsy. Frameless robot-assisted positioning of depth electrodes permits a 3D approach with different obliquities and trajectories. The objective of the present study was to evaluate the morbidity and the accuracy related to this frameless procedure. PATIENTS AND METHODS: Sixty-six patients were managed wherein 901 electrodes were implanted during a 6-year-period...
September 4, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28879317/the-evaluation-of-implementing-smart-patient-controlled-analgesic-pump-with-a-different-infusion-rate-for-different-time-duration-on-postoperative-pain-management
#11
Saeyoung Kim, Younghoon Jeon, Hyeonjun Lee, Jung A Lim, Sungsik Park, Si Oh Kim
BACKGROUND: Control of postoperative pain is an important aspect of postoperative patient management. Among the methods of postoperative pain control, patient-controlled analgesia (PCA) has been the most commonly used. This study tested the convenience and safety of a PCA method in which the dose adjusted according to time. METHODS: This study included 100 patients who had previously undergone orthognathic surgery, discectomy, or total hip arthroplasty, and wished to control their postoperative pain through PCA...
December 2016: J Dent Anesth Pain Med
https://www.readbyqxmd.com/read/28877434/reduction-responsive-polypeptide-micelles-for-intracellular-delivery-of-antineoplastic-agent
#12
Weiguo Xu, Jianxun Ding, Xuesi Chen
Reduction-responsive methoxy poly(ethylene glycol)-block-poly(S-tert-butylmercapto-L-cysteine) copolymers (i.e., mPEG113-b-PBMLC4 and mPEG113-b-PBMLC9) were facilely synthesized through primary amino-initiated ring-opening polymerization (ROP) of disulfide-containing N-carboxyanhydride monomer. The reduction-responsive block copolymers were then investigated for intracellular delivery of antitumor drug after forming smart micelles in vitro and in vivo. The micelles were denoted as P4M and P9M, respectively...
September 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28874815/injectable-and-thermosensitive-tgf-%C3%AE-1-loaded-pcec-hydrogel-system-for-in-vivo-cartilage-repair
#13
Tengfei Zhou, Xiaolong Li, Guo Li, Taoran Tian, Shiyu Lin, Sirong Shi, Jinfeng Liao, Xiaoxiao Cai, Yunfeng Lin
Chondral defects pose a great challenge for clinicians to manage owing to the limited capacity for self-healing. Various traditional approaches have been adopted for the repair of these defects with unsatisfactory results. Cartilage tissue engineering techniques have emerged as promising strategies to enhance regeneration and overcome these traditional shortcomings. The cell-homing based technique is considered the most promising owing to its unique advantages. Thermosensitive hydrogels have been applied as scaffolds for biomedical applications with smart sol-gel response for altering environmental temperature...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873241/a-eutectic-mixture-of-natural-fatty-acids-can-serve-as-the-gating-material-for-near-infrared-triggered-drug-release
#14
Chunlei Zhu, Da Huo, Qiaoshan Chen, Jiajia Xue, Song Shen, Younan Xia
A smart release system responsive to near-infrared (NIR) light is developed for intracellular drug delivery. The concept is demonstrated by coencapsulating doxorubicin (DOX) (an anticancer drug) and IR780 iodide (IR780) (an NIR-absorbing dye) into nanoparticles made of a eutectic mixture of naturally occurring fatty acids. The eutectic mixture has a well-defined melting point at 39 °C, and can be used as a biocompatible phase-change material for NIR-triggered drug release. The resultant nanoparticles exhibit prominent photothermal effect and quick drug release in response to NIR irradiation...
September 5, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28866460/nitric-oxide-sensing-actuators-for-modulating-structure-in-lipid-based-liquid-crystalline-drug-delivery-systems
#15
Qingtao Liu, Jinming Hu, Michael R Whittaker, Thomas P Davis, Ben J Boyd
Herein we report on the development of a nitric oxide-sensing lipid-based liquid crystalline (LLC) system specifically designed to release encapsulated drugs on exposure to NO through a stimulated phase change. A series of nitric oxide (NO)-sensing lipids compatible with phytantriol and GMO cubic phases were designed and synthesized, and utilized in enabling nitric oxide-sensing LLC systems. The nitric oxide (NO)-sensing lipids react with nitric oxide, resulting in hydrolysis of these lipids and phase transition of the LLC system...
August 24, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28866229/photo-controlled-aptamers-delivery-by-dual-surface-gold-magnetic-nanoparticles-for-targeted-cancer-therapy
#16
Jian Zhao, Keyao Tu, Yanlei Liu, Yulei Qin, Xiwei Wang, Lifeng Qi, Donglu Shi
Dual surfaced dumbbell-like gold magnetic nanoparticles (Au-Fe3O4) were synthesized for targeted aptamers delivery. Their unique biological properties were characterized as a smart photo-controlled drug carrier. DNA aptamers targeting vascular endothelial growth factor (VEGF) were assembled onto the surface of Au-Fe3O4 by electrostatic absorption. The binding capacity of the nanoparticles with VEGF aptamers was confirmed by gel electrophoresis. The targeted recognization of ovarian cancer cells by the aptamers-functionalized Au-Fe3O4 nanoparticles (Apt-Au-Fe3O4 NPs) was observed by confocal microscopy...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28862828/a-smart-h2o2-responsive-drug-delivery-system-made-by-halloysite-nanotubes-and-carbohydrate-polymers
#17
Feng Liu, Libin Bai, Hailei Zhang, Hongzan Song, Liandong Hu, Yonggang Wu, Xinwu Ba
A novel chemical hydrogel was facilely achieved by coupling 1,4-phenylenebisdiboronic acid-modified halloysite nanotubes (HNTs-BO) with compressible starch. The modified HNTs and prepared hydrogel were characterized by solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscope (TEM). The linkage of B-C in the hydrogel can be degraded into B-OH and C-OH units in the presence of H2O2, and result into the degradation of the hydrogel...
September 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28861639/repositioning-of-proton-pump-inhibitors-in-cancer-therapy
#18
REVIEW
Zhen-Ning Lu, Bing Tian, Xiu-Li Guo
Drug repositioning, as a smart way to exploit new molecular targets of a known drug, has been gaining increasing attention in the discovery of anti-cancer drugs. Proton pump inhibitors (PPIs) as benzimidazole derivatives, which are essentially H(+)-K(+)-ATPases inhibitors, are commonly used in the treatment of acid-related diseases such as gastric ulcer. In recent years, exploring the new application of PPIs in anti-cancer field has become a hot research topic. Interestingly, cancer cells display an alkaline intracellular pH and an acidic extracellular pH...
August 31, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28856893/temperature-ph-sensitive-nanoantibiotics-and-their-sequential-assembly-for-optimal-collaborations-between-antibacterial-and-immunoregulation
#19
Yu-Lan Wang, Ming He, Richard J Miron, Ao-Ying Chen, Yan-Bing Zhao, Yu-Feng Zhang
Treatment of bacterial infections due to the fast emergence of drug-resistant bacteria is a significant challenge faced in modern medicine. Here the authors report a drug-induced self-assembly nanoantibiotic for treating bacterial infection, with temperature/pH-sensitivity, synergistic antibacterial effect of silver and antibiotics, and immunoregulatory effect. In this nanoantibiotic, smart polymer p(N-isopropylacrylamide-b-acrylic acid) triblock polymer (PNA) utilized to encapsulate the drugs provides convenience in preparing this structure simply through drug-induced self-assembly and controllable release profile by changing the sequence of addition of different drugs...
September 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28855122/bacterial-isolates-degrading-ritalinic-acid-human-metabolite-of-neuro-enhancer-methylphenidate
#20
Marta Woźniak-Karczewska, Monika Čvančarová, Łukasz Chrzanowski, Philippe F-X Corvini, Danuta Cichocka
The consumption of nootropic drugs has increased tremendously in the last decade, though the studies on their environmental fate are still scarce. Nootropics are bioactive compounds designed to alter human's physiology therefore the adverse effects towards wildlife can be expected. In order to understand their environmental impact, the knowledge on their transformation pathways is necessary. Methylphenidate belongs to the most prescribed neuro-enhancers and is among the most favored smart drugs used in non-medical situations...
August 27, 2017: New Biotechnology
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