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Nanomedicine: Nanotechnology, Biology, and Medicine

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https://www.readbyqxmd.com/read/28343014/natural-lipids-enriched-self-nano-emulsifying-systems-for-effective-co-delivery-of-tamoxifen-and-naringenin-systematic-approach-for-improved-breast-cancer-therapeutics
#1
Premjeet Singh Sandhu, Rajendra Kumar, Sarwar Beg, Sanyog Jain, Varun Kushwah, O P Katare, Bhupinder Singh
The nano-miceller drug delivery carriers of tamoxifen (TMX) having natural ingredients like polyunsaturated fatty acid (PUFA) with self-nano-emulsifying properties was developed with naringenin (NG) in a synergistic manner i.e. TMX-NG-SNEDDS. The optimized nano-formulation revealed complete drug release in 30min and >80% permeation in 45min. Superior cellular uptake potential (4.6 to 6.5-fold) of the TMX-NG-SNEDDS using Caco-2 cells while cytotoxicity study on MCF-7 cells indicated significant results (P<0...
March 23, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28343019/a-new-opportunity-for-nanomedicines-micellar-cytochrome-p450-inhibitors-to-improve-drug-efficacy-in-a-cancer-therapy-model
#2
Marion Paolini, Laurence Poul, Audrey Darmon, Matthieu Germain, Agnès Pottier, Laurent Levy, Eric Vibert
Nanomedicines are mainly used as drug delivery systems; here we evaluate a new application - to inhibit a drug's metabolism thereby enhancing its effective dose. Micelles containing the natural furanocoumarin 6',7'-dihydroxybergamottin (DHB), a known CYP450 inhibitor, were developed to transiently block hepatic CYP450-mediated drug metabolism and increase the bioavailability of the oncology drug docetaxel. Administered in mice 24hours prior to the drug, DHB-micelles enhanced antitumor efficacy in the tumor xenograft models HT-29 and MDA-MB-231, when compared to the drug alone...
March 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28343018/cus-as-a-gatekeeper-of-mesoporous-upconversion-nanoparticles-based-drug-controlled-release-system-for-tumor-targeted-multimodal-imaging-and-synergetic-chemo-thermotherapy
#3
Xiangjie Su, Feifei Zhao, Yuhui Wang, Xiaosa Yan, Shaona Jia, Bin Du
In this work, a tumor-targeted multifunctional mesoporous upconversion nanoparticle-based drug controlled release system was developed for UCL/MRI/PAT guided synergetic chemo- thermotherapy. Herein, the core-shell mesoporous upconversion nanoparticles served as drug carrier exhibiting higher upconversion luminescence emission intensity, with CuS as a gatekeeper through a cleavable disulfide bond under the influence of glutathione. CuS could not only prevent drug from early release during the delivery but also improve the delivery system function with the ability of photothermal therapy and photoacoustic tomography...
March 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28343017/%C3%AE-lactoglobulin-an-efficient-nanocarrier-for-advanced-delivery-systems
#4
REVIEW
Zahra Shafaei, Behafarid Ghalandari, Akbar Vaseghi, Adeleh Divsalar, Thomas Haertlé, Ali Akbar Saboury, Lindsay Sawyer
Thanks to the progress of nanotechnology there are several agent-delivery systems that can be selected to achieve rapid and specific delivery of a wide variety of biologically active agents. Consequently, the manipulation and engineering of biopolymers has become one of the most exciting subjects for those who study delivery systems on the nano-scale. In this regard, both nanoparticle formation and a carrier role have been observed in the case of the globular milk whey protein, β-lactoglobulin (β-LG), setting it apart from many other proteins...
March 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28343016/evaluation-of-antitumor-activity-and-cardiac-toxicity-of-a-bone-targeted-ph-sensitive-liposomal-formulation-in-a-bone-metastasis-tumor-model-in-mice
#5
Diego Dos Santos Ferreira, Bruno Luís Jesus de Oliveira Pinto, Vidhya Kumar, Valbert Nascimento Cardoso, Simone Odília Fernandes, Cristina Maria Souza, Geovanni Dantas Cassali, Anna Moore, David Sosnovik, Christian Farrar, Elaine Amaral Leite, Ricardo José Alves, Mônica Cristina de Oliveira, Alexander Ramos Guimarães, Peter Caravan
Chemotherapy for bone tumors is a major challenge because of the inability of therapeutics to penetrate dense bone mineral. We hypothesize that a nanostructured formulation with high affinity for bone could deliver drug to the tumor while minimizing off-target toxicity. Here, we evaluated the efficacy and toxicity of a novel bone-targeted, pH-sensitive liposomal formulation containing doxorubicin in an animal model of bone metastasis. Biodistribution studies with the liposome showed good uptake in tumor, but low accumulation of doxorubicin in the heart...
March 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28343015/systemic-delivery-of-the-tumor-necrosis-factor-gene-to-tumors-by-a-novel-dual-dna-nanocomplex-in-a-nanoparticle-system
#6
Vasundhara Shukla, Manu Dalela, Manika Vij, Munia Ganguli, Ralph Weichselbaum, Surender Kharbanda, Donald Kufe, Harpal Singh
Many cancers fail to respond to immunotherapy as a result of immune suppression by the tumor microenvironment. The exogenous expression of immune cytokines to reprogram the tumor microenvironment represents an approach to circumvent this suppression. The present studies describe the development of a novel dual nanoparticle (DNP) system for driving DNA expression vectors encoding inflammatory cytokines in tumor cells. The DNP system consists of a DNA expression vector-cationic nanocomplex (NC) surrounded by a diblock polymeric NP...
March 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28315477/magnetic-but-not-non-magnetic-reduced-graphene-oxide-in-spinal-cord-increases-nociceptive-neuronal-responsiveness
#7
Luis Paulo Manzo, Helder Ceragioli, Ivan José Bonet, Catarine Massucato Nishijima, Willians Fernando Vieira, Elaine Conceição Oliveira, João-Batista Destro-Filho, César Renato Sartori, Claudia Herrera Tambeli, Carlos Amilcar Parada
The interference between external magnetic fields and neurophysiology is not new, however, the role of the neuronal magnetic field remains unclear. This study aimed at investigating a possible role of the neuronal magnetic field in nociception. Highly and poorly magnetic reduced graphene oxide (rGO) were injected intrathecally in rats. Nociceptive responsiveness was greater in rats that received highly magnetic-rGO in von Frey electronic or intraplantar capsaicin tests. Furthermore, in vitro experiments demonstrated that the number of KCl-responsive DRG-neurons was greater when treated with highly magnetic-rGO when compared with non-magnetic-rGO...
March 14, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28300659/milk-derived-exosomes-for-oral-delivery-of-paclitaxel
#8
Ashish K Agrawal, Farrukh Aqil, Jeyaprakash Jeyabalan, Wendy A Spencer, Joshua Beck, Beth W Gachuki, Sara S Alhakeem, Karine Oben, Radha Munagala, Subbarao Bondada, Ramesh C Gupta
In this report milk-derived exosomes have been investigated for oral delivery of the chemotherapeutic drug paclitaxel (PAC) as an alternative to conventional i.v. therapy for improved efficacy and reduced toxicity. PAC-loaded exosomes (ExoPAC) were found to have a particle size of ~108nm, a narrow particle size distribution (PDI ~0.190), zeta potential (~ -7mV) and a practical loading efficiency of ~8%. Exosomes and ExoPAC exhibited excellent stability in the presence of simulated-gastrointestinal fluids, and during the storage at -80°C...
March 11, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28300658/effect-of-particle-size-on-the-biodistribution-toxicity-and-efficacy-of-drug-loaded-polymeric-nanoparticles-in-chemoradiotherapy
#9
Joseph M Caster, Stephanie K Yu, Artish N Patel, Nicole J Newman, Zachary J Lee, Samuel B Warner, Kyle T Wagner, Kyle C Roche, Xi Tian, Yuanzeng Min, Andrew Z Wang
Nanoparticle (NP) therapeutics can improve the therapeutic index of chemoradiotherapy (CRT). However, the effect of NP physical properties, such particle size, on CRT is unknown. To address this, we examined the effects of NP size on biodistribution, efficacy and toxicity in CRT. PEG-PLGA NPs (50, 100, 150nm mean diameters) encapsulating wotrmannin (wtmn) or KU50019 were formulated. These NP formulations were potent radiosensitizers in vitro in HT29, SW480, and lovo rectal cancer lines. In vivo, the smallest particles avoided hepatic and splenic accumulation while more homogeneously penetrating tumor xenografts than larger particles...
March 11, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285163/the-effects-of-gold-nanoparticles-functionalized-with-%C3%A3-amyloid-specific-peptides-on-an-in-vitro-model-of-blood-brain-barrier
#10
Julie Ruff, Sabine Hüwel, M J Kogan, U Simon, H J Galla
We studied the effect of gold nanoparticle (AuNP) size, surface charge, concentration and morphology on the integrity of the Blood-Brain-Barrier (BBB) in a well-established in vitro model set-up. We focused on the effect of peptide functionalized hollow gold nanospheres and gold nanorods, which selectively bind to amyloidogenic β-amyloid structures. These AuNP conjugates have already been successfully tested as photothermal absorbers for potential application in Alzheimer's disease (AD) therapy in an in vitro set-up, but may exhibit a low passage through the BBB due to their overall negative charge...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285162/angular-dose-anisotropy-around-gold-nanoparticles-exposed-to-x-rays
#11
Sherif M Gadoue, Dolla Toomeh, Piotr Zygmanski, Erno Sajo
Gold nanoparticle (GNP) radiotherapy has recently emerged as a promising modality in cancer treatment. The use of high atomic number nanoparticles can lead to enhanced radiation dose in tumors due to low-energy leakage electrons depositing in the vicinity of the GNP. A single metric, the dose enhancement ratio has been used in the literature, often in substantial disagreement, to quantify the GNP's capacity to increase local energy deposition. This 1D approach neglects known sources of dose anisotropy and assumes that one average value is representative of the dose enhancement...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285161/nanoparticle-mediated-ppar%C3%AE-gene-delivery-on-dental-implants-improves-osseointegration-via-mitochondrial-biogenesis-in-diabetes-mellitus-rat-model
#12
Young-Hee Lee, Jeong-Seok Kim, Ji-Eun Kim, Min-Ho Lee, Jae-Gyu Jeon, Il-Song Park, Ho-Keun Yi
Diabetes mellitus (DM) has a detrimental effect on osseointegration, stability and longevity of implants due to osteoporosis. In this study, PPARγ-loaded dental implants were investigated for the improvement of osseointegration and peri-implantitis. Chitosan gold nanoparticles conjugated with PPARγ cDNA were introduced on titanium mini-implant surfaces for PPARγ release to rat mandibular. DM-induced rat mandible showed structural changes such as decreased bone mass and increased inflammatory molecules, and diminution of PPARγ expression and bone formation molecules compared to normal rats...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285160/ethanol-dispersed-and-antibody-conjugated-polymer-nanofibers-for-the-selective-capture-and-3-dimensional-culture-of-epcam-positive-cells
#13
Junghyo Yoon, Hee-Sook Yoon, Yoojin Shin, Sanghyun Kim, Youngjun Ju, Jungbae Kim, Seok Chung
Electrospun and ethanol-dispersed polystyrene-poly(styrene-co-maleic anhydride) (PS-PSMA) nanofibers (NFs) were used as a platform for the selective capture and three-dimensional culture of EpCAM-positive cells in cell culture medium and whole blood. The NFs were treated with streptavidin to facilitate bond formation between the amino groups of streptavidin and the maleic anhydride groups of the NFs. A biotinylated anti-EpCAM monoclonal antibody (mAb) was attached to the streptavidin-conjugated NFs via the selective binding of streptavidin and biotin...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285159/hydroxyapatite-reinforced-inherent-rgd-containing-silk-fibroin-composite-scaffolds-promising-platform-for-bone-tissue-engineering
#14
Sibaram Behera, Deboki Naskar, Sunaina Sapru, Promita Bhattacharjee, Tuli Dey, Ananta K Ghosh, Mahitosh Mandal, Subhas C Kundu
Replacement and repair of ectopic bone defects and traumatized bone tissues are done using porous scaffolds and composites. The prerequisites for such scaffolds include high mechanical strength, osseoconductivity and cytocompatibility. The present work is designed to address such requirements by fabricating a reinforced cytocompatible scaffold. Biocompatible silk protein fibroin collected from tropical non-mulberry tasar silkworm (Antheraea mylitta) is used to fabricate fibroin-hydroxyapatite (HAp) nanocomposite particles using chemical precipitation method...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285158/catalytic-topological-insulator-bi2se3-nanoparticles-for-in-vivo-protection-against-ionizing-radiation
#15
Xiao-Dong Zhang, Yaqi Jing, Shasha Song, Jiang Yang, Jun-Ying Wang, Xuhui Xue, Yuho Min, Gyeongbae Park, Xiu Shen, Yuan-Ming Sun, Unyong Jeong
Bi2Se3 nanoparticles (NPs) have attracted wide interests in biological and medical applications. Layer-like Bi2Se3 with high active surface area is promising for free radical scavenging. Here, we extended the medical applications of Bi2Se3 NPs further to in vivo protection against ionizing radiation based on their superior antioxidant activities and electrocatalytic properties. It was found that Bi2Se3 NPs can significantly increase the surviving fraction of mice after exposure of high-energy radiation of gamma ray...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28285157/near-infrared-light-responsive-nanoparticles-with-thermosensitive-yolk-shell-structure-for-multimodal-imaging-and-chemo-photothermal-therapy-of-tumor
#16
Song Shen, Bei Ding, Shengchang Zhang, Xueyong Qi, Kun Wang, Jie Tian, Yongsheng Yan, Yanru Ge, Lin Wu
Thermosensitive yolk-shell nanoparticles were developed as remote-controlled targeting drug delivery platform for multimodal imaging and combined therapy of cancer. The nanoparticles were fabricated using magnetic Fe3O4 nanoparticles as photothermal cores, thermo-responsive poly(N-isopropylacrylamide)-co-1-Vinyl-2-pyrrolidone p(NIPAM-co-NVP) as shells (Fe3O4-PNIPAM), with a hollow space between the two layers for loading of chemotherapeutic drug. The magnetic iron oxide nanoparticles cores could absorb and transform light to heat efficiently upon the irradiation of near infrared (NIR) laser, resulting in the shrink of the PNIPAM shell and the release of chemo-drugs...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28263813/ligand-decorated-click-polypeptide-derived-nanoparticles-for-targeted-drug-delivery-applications
#17
Mohiuddin A Quadir, Stephen W Morton, Lawrence B Mensah, Kevin Shopsowitz, Jeroen Dobbelaar, Nicole Effenberger, Paula T Hammond
A ligand decorated, synthetic polypeptide block copolymer platform with environment-responsive capabilities was designed. We evaluated the potential of this system to function as a polymersome for targeted-delivery of a systemic chemotherapy to tumors. Our system employed click chemistry to provide a pH-responsive polypeptide block that drives nanoparticle assembly, and a ligand (folic acid) conjugated PEG block that targets folate-receptor over-expressing cancer cells. These nanocarriers were found to encapsulate a high loading of conventional chemotherapeutics (e...
March 2, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28259803/nanoemulsion-loaded-gel-for-topical-co-delivery-of-clobitasol-propionate-and-calcipotriol-in-psoriasis
#18
Amanpreet Kaur, Sameer S Katiyar, Varun Kushwah, Sanyog Jain
Current work reports the development and optimization of clobitasol propionate (CP) and calcipotriol (CT) loaded nanoemulsion based gel for topical treatment of psoriasis. Components of nanoemulsion viz., oil and surfactant/co-surfactant were selected depending upon solubility and emulsification potential respectively. The optimized ratio of 5:3:2 of Capmul MCM C8 EP, Cremophor RH 40 and Labrafil 1944 CS was selected. Carbopol 980 was used as gelling agent to achieve final drug concentration of 0.05% w/w and 0...
March 1, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28259802/a-pharmacokinetic-study-of-gc-1-delivery-using-a-nanochannel-membrane-device
#19
Carly S Filgueira, Andrea Ballerini, Eugenia Nicolov, Corrine Ying Xuan Chua, Priya Jain, Zachary W Smith, April L Gilbert, Francesco Scaglione, Alessandro Grattoni
This study demonstrated a nanochannel membrane device (NMD) for controlled and sustained release of GC-1 in rats, in the context of the treatment of metabolic syndrome. Release profiles were established in vitro both with and without 5% labrasol for over 2 months. In vivo pharmacokinetic evaluation showed effective GC-1 plasma concentrations, which resulted in significant reductions in body weight after just one week of treatment when compared to the NMD releasing vehicle only (PBS). We also provided evidence that rats treated with NMD-GC-1 present sub-active thyroids and clear differences in the morphology of the epithelium and follicles as compared to the controls, while the heart showed changes in weight...
March 1, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28259801/effect-of-tetrahedral-dna-nanostructures-on-osteogenic-differentiation-of-mesenchymal-stem-cells-via-activation-of-the-wnt-%C3%AE-catenin-signaling-pathway
#20
Xiao-Ru Shao, Shi-Yu Lin, Qiang Peng, Si-Rong Shi, Xiao-Long Li, Tao Zhang, Yun-Feng Lin
Adipose-derived stem cells (ADSCs) are considered to be ideal stem cell sources for bone regeneration owing to their ability to differentiate into osteo-like cells. Therefore, they have attracted increasing attention in recent years. Tetrahedral DNA nanostructures (TDNs), a new type of DNA-based biomaterials, have shown great potential for biomedical applications. In the present work, we aimed to investigate the role played by TDNs in osteogenic differentiation and proliferation of ADSCs and tried to explore if the canonical Wnt signal pathway could be the vital biological mechanism driving these cellular responses...
March 1, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
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