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https://www.readbyqxmd.com/read/29317815/double-stranded-phosphodiester-cytosine-guanine-oligodeoxynucleotide-complexed-with-calcium-phosphate-as-a-potent-vaccine-adjuvant-for-activating-cellular-and-th1-type-humoral-immunities
#1
Nobutaka Hanagata, Xianglan Li, Min-Hua Chen, Jie Li, Shinya Hattori
Conventional class B cytosine-guanine (CpG) (CpG-B) oligodeoxynucleotide (ODNs) consisting of a single-stranded (ss) phosphorothioate (PT) backbone (ss CpG-B-PT) is converted from a proinflammatory cytokine inducer to a type-I interferon (IFN) inducer when complexed with cationic materials. In this study, we designed ss CpG-B and double-stranded (ds) CpG-B ODNs with a phosphodiester (PD) backbone (ss CpG-B-PD and ds CpG-B-PD, respectively) that became type-I IFN inducers upon complexation with Lipofectamine 2000 (Lipo), a cationic liposome...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29305156/novel-lipids-with-three-c18-fatty-acid-chains-and-an-amino-acid-head-group-for-ph-responsive-and-sustained-antibiotic-delivery
#2
Mahantesh Jadhav, Rahul S Kalhapure, Sanjeev Rambharose, Chunderika Mocktar, Sanil Singh, Tetsuya Kodama, Thirumala Govender
The acidic environment at bacterial infection sites is a potential external stimulus for targeted antibiotic delivery. This paper reports new biocompatible pH-sensitive lipids (PSLs) with three hydrocarbon tails, and a head group with a secondary amine and carboxylate function for site-specific nano delivery of vancomycin (VCM). PSLs formed stable liposomes with mean vesicle diameters and polydispersity indices between 99.38 ± 6.59 nm to 105.60 ± 5.38 nm and 0.161 ± 0.003 to 0.219 ± 0...
January 2, 2018: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29283945/computer-assisted-volumetric-analysis-and-quantitatively-anophthalmic-orbit-reconstruction-with-dorsalis-pedis-flap-and-bone-graft
#3
Li-Ying Cheng, Wei-Wei Bian, Xiao-Ming Sun, Zhe-Yuan Yu, Ying Zhang, Lu Zhang, Yu-Guang Zhang, Rong Jin
Current approaches to orbit reconstruction are based on the assumption of facial symmetry and surgeons' experiences, and the reconstructed orbits are not precise. Through computer-assisted volumetric quantitative analysis, the volume of the bony orbit, and the volume of the soft tissues in both the anophthalmic orbit and the contralateral orbit are calculated in 39 anophthalmic patients. The rib graft is used for orbit reconstruction; the dosalis pedis flap and lipo-injection were used for soft tissue reconstruction and skin socket reconstruction...
December 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29281790/disintegrable-nir-light-triggered-gold-nanorods-supported-liposomal-nanohybrids-for-cancer-theranostics
#4
Deepak S Chauhan, Rajendra Prasad, Janhavi Devrukhkar, Kaliaperumal Selvaraj, Rohit Srivastava
In this work, facile synthesis and application of targeted, dual therapeutic gold nanorods-liposome (GNR-Lipos) nanohybrid for imaging guided photothermal therapy and chemotherapy is investigated. The dual therapeutic GNR-Lipos nanohybrid consists of GNR supported, and doxorubicin (DOX) loaded liposome. GNRs not only serve as a photothermal agent and increase the drug release in intracellular environment of cancer cells but also provide mechanical strength to liposomes by being decorated both inside and outside of bilayer surfaces...
December 27, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29280320/convenient-monitoring-system-of-intracellular-microrna-expression-during-adipogenesis-via-mechanical-stimulus-induced-exocytosis-of-lipovesicular-mirna-beacon
#5
Seungmin Han, Byunghoon Kang, Eunji Jang, Jisun Ki, Eunjung Kim, Mun-Young Jeong, Yong-Min Huh, Hye-Young Son, Seungjoo Haam
Noninvasive investigation of microRNAs (miRNAs) expression, which is deeply related to biological phenomena such as stem cell differentiation, in culture soup is particularly useful for monitoring of stem cell differentiation without phototoxicity of living cells, especially when cell morphologies remain unchanged during differentiation. However, real-time detection of miRNA in culture soup is not recommended because of insufficient miRNA amounts in culture soup. In this study, a convenient method is introduced for real-time assessing intracellular miRNA in culture soup by using lipovesicular miRNA beacon (Lipo-mB) and mechanical stimulus-mediated exocytosis...
December 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29280310/osteogenic-stimulation-of-human-adipose-derived-mesenchymal-stem-cells-using-a-fungal-metabolite-that-suppresses-the-polycomb-group-protein-ezh2
#6
Rebekah M Samsonraj, Amel Dudakovic, Bushra Manzar, Buer Sen, Allan B Dietz, Simon M Cool, Janet Rubin, Andre J van Wijnen
Strategies for musculoskeletal tissue regeneration apply adult mesenchymal stem/stromal cells (MSCs) that can be sourced from bone marrow- and lipo-aspirates. Adipose tissue-derived MSCs are more easily harvested in the large quantities required for skeletal tissue-engineering approaches, but are generally considered to be less osteogenic than bone marrow MSCs. Therefore, we tested a new molecular strategy to improve their osteogenic lineage-differentiation potential using the fungal metabolite cytochalasin D (CytoD)...
December 27, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29277681/enhanced-antitumor-and-anti-metastasis-efficacy-against-aggressive-breast-cancer-with-a-fibronectin-targeting-liposomal-doxorubicin
#7
Kejun Jiang, Xu Song, Liuqing Yang, Lin Li, Zhuoya Wan, Xun Sun, Tao Gong, Qing Lin, Zhirong Zhang
The chemotherapy of aggressive breast tumor is usually accompanied by a poor prognosis because of the metastasis of tumor cells. Thus, it is important to simultaneously enhance antitumor and anti-metastasis efficacy. Fibronectin and its complexes are expressed on the walls of tumor vessels and in tumor stroma. Moreover, the expression of fibronectin in metastatic sites is even higher than that in primary tumors. Herein, we designed a fibronectin-targeting CREKA-modified liposomal doxorubicin (CREKA-Lipo-Dox) for the therapy of metastatic breast tumor...
December 22, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29276817/a-fast-kinetic-response-aluminum-sulfur-battery
#8
Huicong Yang, Lichang Yin, Ji Liang, Zhenhua Sun, Yuzuo Wang, Hucheng Li, Kuang He, Lipo Ma, Zhangquan Peng, Siyao Qiu, Chenghua Sun, Hui-Ming Cheng, Feng Li
The electrochemical performance of the aluminum-sulfur (Al-S) battery has very poor reversibility and a low charge/discharge current density due to the slow kinetic processes determined by an inevitable dissociation reaction from Al2Cl7- to free Al3+. Here, we have used Al2Cl6Br- instead of Al2Cl7- as the dissociation reaction reagent. A 15-time faster reaction rate of Al2Cl6Br- dissociation than that of Al2Cl7- has been confirmed by density function theory calculations and the Arrhenius equation. This accelerated dissociation reaction was experimentally verified by the increase of exchange current density during Al electro-deposition...
December 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29274457/unique-biomarkers-as-a-potential-predictive-tool-for-differentiation-of-bacillus-cereus-group-based-on-real-time-pcr
#9
Byung-Jae Park, Ramachandran Chelliah, Shuai Wei, Joong-Hyun Park, Fereidoun Forghani, Youn-Seo Park, Min-Seok Cho, Dong-Suk Park, Deog-Hwan Oh
The aim of the study was to develop unique biomarkers for qPCR detection of Bacillus cereus group. Clinical and soil isolates were identified by specifically designed biomarkers - Lipoprotein (OPL-114-lipo), Methyltransferase (MT-17) and S-layer homology domain protein (151-1BC). In order to design biomarkers, we used 120 bacterial strains grouped into B. cereus and non-Bacillus group. The B. cereus group was confirmed by 108 strains of B. cereus and B. thuringiensis (30 reference and 78 wild), along with 3 strains of B...
December 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29273615/longitudinally-extensive-transverse-myelitis-after-campylobacter-jejuni-enteritis
#10
Yudy Llamas, Karl Hazel, Patrick Nicholson, Lisa Costelloe
Campylobacter jejuni infection is well-known to precipitate Guillain-Barré syndrome through an immune-mediated attack on the peripheral nervous system. Molecular mimicry between C. jejuni lipo-oligosaccharides on the surface of infectious agents and human gangliosides in the peripheral nerves induces cross-reactive immune responses. Although gangliosides also occur in the central nervous system (CNS), autoimmune CNS disorders rarely follow Cjejuni infections. However, longitudinally extensive transverse myelitis commonly has a parainfectious cause, triggered by a wide range of micro-organisms including viruses and bacteria...
December 22, 2017: Practical Neurology
https://www.readbyqxmd.com/read/29243921/extra-sugar-on-vancomycin-new-analogues-for-combating-multidrug-resistant-staphylococcus-aureus-and-vancomycin-resistant-enterococci
#11
Dongliang Guan, Feifei Chen, Lun Xiong, Feng Tang, Faridoon Faridoon, Yunguang Qiu, Naixia Zhang, Likun Gong, Jian Li, Lefu Lan, Wei Huang
Lipophilic substitution on vancomycin is an effective strategy for development of novel vancomycin analogues against drug-resistant bacteria by enhancing bacterial cell wall interaction. However, hydrophobic structures usually led to long elimination half-life and accumulative toxicity, therefore hydrophilic fragments were also introduced to the lipo-vancomycin to regulate their PK/PD properties. Here, we synthesized a series of new vancomycin analogues carrying various sugar moieties on the 7th-amino acid phenyl ring and lipophilic substitutions on vancosamine with extensive SAR analysis...
December 15, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29239940/prolonged-duration-local-anesthesia-using-liposomal-bupivacaine-combined-with-liposomal-dexamethasone-and-dexmedetomidine
#12
Alina Y Rwei, Robert T Sherburne, David Zurakowski, Bruce Wang, Daniel S Kohane
BACKGROUND: The relatively short duration of effect of local anesthetics has been addressed by encapsulation in drug delivery systems. Codelivery with a single compound that produces an adjuvant effect on nerve block but without intrinsic local anesthetic properties can further prolong the nerve block effect. Here, we investigated whether codelivery of more than 1 encapsulated adjuvant compound can further enhance nerve blockade. METHODS: Liposomes loaded with bupivacaine (Bup), dexamethasone phosphate (DexP), or dexmedetomidine (DMED) were synthesized and its in vitro drug release profiles were determined...
December 11, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29207088/liposome-encapsulated-luteolin-showed-enhanced-antitumor-efficacy-to-colorectal-carcinoma
#13
Guixia Wu, Jing Li, Jinqiao Yue, Shuying Zhang, Kurexi Yunusi
Luteolin is a falconoid compound that is present in various types of plants and possesses remarkable potential as a chemopreventive agent. However, the poor aqueous solubility of luteolin limits its clinical application. In the present study, an approach towards chemoprevention was explored using liposomes to deliver luteolin, and the antitumor efficacy was investigated in colorectal carcinoma. The present findings demonstrated that luteolin was efficiently encapsulated into liposomes with an encapsulation efficiency as high as 90%...
November 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29195800/nir-triggered-liposome-gold-nanoparticles-entrapping-curcumin-as-in-situ-adjuvant-for-photothermal-treatment-of-skin-cancer
#14
Surya Prakash Singh, Syed Baseeruddin Alvi, Deepak Bharadwaj, Anula Divyash Singh, Sasidhar Venkata Manda, Rohit Srivastava, Aravind Kumar Rengan
We report the synthesis of a biodegradable liposome gold nanoparticles for curcumin (Au-Lipos Cur NPs) delivery. This entrapped curcumin served as an in situ adjuvant for photothermal therapy. Curcumin was loaded in Au-Lipos NPs with an encapsulation efficiency of ∼70%. The gold coating enabled the NPs to specifically absorb NIR light (780nm) by virtue of Surface Plasmon Resonance (SPR) and this light energy was converted to heat. The generated heat destabilized the liposomal core enhancing the release of encapsulated curcumin...
November 28, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29181855/liposomal-encapsulation-of-silver-nanoparticles-enhances-cytotoxicity-and-causes-induction-of-reactive-oxygen-species-independent-apoptosis
#15
A Yusuf, A Brophy, B Gorey, A Casey
Silver nanoparticles (AgNP) are one of the most widely investigated metallic NPs due to their promising antibacterial activities. In recent years, AgNP research has shifted beyond antimicrobial use to potential applications in the medical arena. This shift coupled with the extensive commercial applications of AgNP will further increase human exposure and the subsequent risk of adverse effects that may result from repeated exposures and inefficient delivery, meaning research into improved AgNP delivery is of paramount importance...
November 27, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29158272/combination-antibiotic-exposure-selectively-alters-the-development-of-vancomycin-intermediate-resistance-in-staphylococcus-aureus
#16
Xuting Zheng, Andrew D Berti, Sue McCrone, Melanie Roch, Adriana E Rosato, Warren E Rose, Baiyi Chen
Invasive methicillin-resistant Staphylococcus aureus (MRSA) treated with vancomycin (VAN) is associated with reduced VAN susceptibility and treatment failure. VAN combination therapy is one strategy to improve response, but comprehensive assessments of combinations to prevent resistance are limited. This study identifies optimal combinations to prevent the emergence of VAN-intermediate Staphylococcus aureus (VISA). Two standard MRSA and two heterogeneous VISA (hVISA) strains were exposed for 28 days in vitro to VAN alone, VAN with cefazolin (CFZ), fosfomycin (FOF), gentamicin (GEN), meropenem (MEM), rifampin (RIF), piperacillin-tazobactam (TZP) or trimethoprim-sulfamethoxazole (SXT)...
November 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29156692/increased-transcriptional-and-metabolic-capacity-for-lipid-metabolism-in-the-peripheral-zone-of-the-prostate-may-underpin-its-increased-susceptibility-to-cancer
#17
Omar Al Kadhi, Maria H Traka, Antonietta Melchini, Perla Troncoso-Rey, Wiktor Jurkowski, Marianne Defernez, Purnima Pachori, Robert D Mills, Richard Y Ball, Richard F Mithen
The human prostate gland comprises three distinct anatomical glandular zones, namely the peripheral, central and transitional zones. Although prostate cancer can arise throughout the prostate, it is more frequent in the peripheral zone. In contrast, hyperplasia occurs most frequently in the transitional zone. In this paper, we test the hypothesis that peripheral and transitional zones have distinct metabolic adaptations that may underlie their different inherent predispositions to cancer and hyperplasia. In order to do this, we undertook RNA sequencing and high-throughput metabolic analyses of non-cancerous tissue from the peripheral and transitional zones of patients undergoing prostatectomy...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29129657/transport-mechanism-of-lipid-covered-saquinavir-pure-drug-nanoparticles-in-intestinal-epithelium
#18
Dengning Xia, Yuan He, Qiuxia Li, Cunde Hu, Wei Huang, Yunhai Zhang, Feng Wan, Chi Wang, Yong Gan
Pure drug nanoparticles (NPs) represent a promising formulation for improved drug solubility and controlled dissolution velocity. However, limited absorption by the intestinal epithelium remains challenge to their clinical application, and little is known about how these NPs within the cells are transported. To improve cellular uptake and transport of pure nanodrug in cells, here, a lipid covered saquinavir (SQV) pure drug NP (Lipo@nanodrug) was designed by modifying a pure SQV NP (nanodrug) with a phospholipid bilayer...
November 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29129572/biocompatible-fluorinated-poly-%C3%AE-amino-ester-s-for-safe-and-efficient-gene-therapy
#19
Jia-Hui Gong, Yi Wang, Lei Xing, Peng-Fei Cui, Jian-Bin Qiao, Yu-Jing He, Hu-Lin Jiang
Cationic polymers have been widely used as one of the most promising non-viral vehicles for gene delivery due to their potential safety and ease of large-scale production. Here, we report the design and synthesis of a series of novel biodegradable fluorinated poly(β-amino ester)s (FPBAEs) by simple Michael-addition reaction as safe and efficient gene carrier. The results of transfection efficacy assay demonstrated the optimal FPBAE could mediated much higher GFP expression than the commercial transfection agents, polyethyleneimine (PEI, Mw = 25K) and Lipo 2000, as well as the non-fluorinated poly(β-amino ester)s (PBAE) on both HeLa and HEK-293T cell lines (higher than 70 and 90%, respectively), which was largely attributed to fluorination...
November 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29120820/development-of-pegylated-aspartic-acid-modified-liposome-as-a-bone-targeting-carrier-for-the-delivery-of-paclitaxel-and-treatment-of-bone-metastasis
#20
Shugo Yamashita, Hidemasa Katsumi, Nozomi Hibino, Yugo Isobe, Yumiko Yagi, Yuka Tanaka, Saki Yamada, Chihiro Naito, Akira Yamamoto
To prevent bone metastasis, we developed polyethylene glycol (PEG)-conjugated aspartic acid (Asp)-modified liposomes (PEG-Asp-Lipo) as a bone-targeting carrier of paclitaxel (PTX) by using Asp-modified 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE-Asp). The affinity of Asp-modified liposomes to hydroxyapatite increased as the concentration of DPPE-Asp increased. The bone accumulation of [3H]-labeled PEG(2)-Asp(33)-Lipo was approximately 24.6% 360 min after intravenous injection in mice, in contrast to 5...
October 31, 2017: Biomaterials
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