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protein nano-delivery

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https://www.readbyqxmd.com/read/28157292/structurally-programmed-assembly-of-translation-initiation-nanoplex-for-superior-mrna-delivery
#1
Jiahe Li, Wade Wang, Yanpu He, Yingzhong Li, Emily Z Yan, Ketian Zhang, Darrell J Irvine, Paula T Hammond
Messenger RNA (mRNA) represents a promising class of nucleic-acid-based therapeutics. While numerous nanocarriers have been developed for mRNA delivery, the inherent labile nature of mRNA results in a very low transfection efficiency and poor expression of desired protein. Here we preassemble the mRNA translation initiation structure through an inherent molecular recognition between 7-methylguanosine (m(7)G)-capped mRNA and eukaryotic initiation factor 4E (eIF4E) protein to form ribonucleoproteins (RNPs), thereby mimicking the first step of protein synthesis inside cells...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28139723/single-%C3%AE-particle-irradiation-permits-real-time-visualization-of-rnf8-accumulation-at-dna-damaged-sites
#2
Giovanna Muggiolu, Michal Pomorski, Gérard Claverie, Guillaume Berthet, Christine Mer-Calfati, Samuel Saada, Guillaume Devès, Marina Simon, Hervé Seznec, Philippe Barberet
As well as being a significant source of environmental radiation exposure, α-particles are increasingly considered for use in targeted radiation therapy. A better understanding of α-particle induced damage at the DNA scale can be achieved by following their tracks in real-time in targeted living cells. Focused α-particle microbeams can facilitate this but, due to their low energy (up to a few MeV) and limited range, α-particles detection, delivery, and follow-up observations of radiation-induced damage remain difficult...
January 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28137239/targeted-theranostics-against-solid-cancer-using-metal-bond-milk-protein-and-aptamers
#3
Suman Chaudhary, Rupinder Kaur Kanwar, Jagat Rakesh Kanwar
Targeted therapeutics is a new generation therapy that can increase the efficacy of chemotherapeutic drugs, by facilitating site-specific delivery with minimum off-target effects. Amongst the targeted therapy, nucleic-acid based aptamers are increasingly gaining interest due to their small size, long shelf-life and ease in synthesis. Further, lactoferrin, a milk protein belonging to the transferrin family is now an established multi-functional iron-binding protein. Its applicability as an immunomodulator, antimicrobial and an anti-cancer agent has made this protein highly valuable...
January 30, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28123631/non-invasive-administration-of-biodegradable-nano-carrier-vaccines
#4
REVIEW
Mohd Abul Kalam, Abdul Arif Khan, Aws Alshamsan
Polymeric nanoparticulate carriers play an important role and holding a significant potential for the development of novel immunomodulatory agents as easily they are taken up by antigen presenting cells. They allow an enhanced antigen stability, better immunogenicity and immunostimulatory effect with sustained and controlled release of the antigen to the target sites. Better information and vital understanding of mechanism of action, interaction of such vectors with the APCs and dendritic cells and antigen release kinetics in immunomodulatory effects, and improved knowledge of their in vivo fate and distribution are now needed, those collectively would speed up the rational strategies of nanoparticles as carriers for vaccines and other protein antigens...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28120725/bile-salt-stabilized-vesicles-bilosomes-a-novel-nano-pharmaceutical-design-for-oral-delivery-of-proteins-and-peptides
#5
Javed Ahmad, Madhur Singhal, Saima Amin, Md Rizwanullah, Sohail Akhter, Mohammad Amjad Kamal, Nafis Haider, Patrick Midoux, Chantal Pichon
With the advent of novel vesicular drug delivery systems especially bilosomes, for large molecular weight proteins and peptides, their oral administration seems a viable approach. These nano-vesicles have shown promising results for the effective delivery of insulin and other therapeutics, perhaps due to their structural composition. The present review has elaborated the biopharmaceutical challenges for the oral delivery of therapeutic proteins and peptides as well as presented a novel approach to deliver the essential macromolecules through oral route as bilosomes...
January 24, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28116676/scientific-and-regulatory-considerations-for-generic-complex-drug-products-containing-nanomaterials
#6
Nan Zheng, Dajun D Sun, Peng Zou, Wenlei Jiang
In the past few decades, the development of medicine at the nanoscale has been applied to oral and parenteral dosage forms in a wide range of therapeutic areas to enhance drug delivery and reduce toxicity. An obvious response to these benefits is reflected in higher market shares of complex drug products containing nanomaterials than that of conventional formulations containing the same active ingredient. The surging market interest has encouraged the pharmaceutical industry to develop cost-effective generic versions of complex drug products based on nanotechnology when the associated patent and exclusivity on the reference products have expired...
January 23, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28116599/nano-reservoir-bioadhesive-tablets-enhance-protein-drug-permeability-across-the-small-intestine
#7
Lifang Yin, Yong Wang, Cuifeng Wang, Min Feng
Most therapeutic proteins are classified as class III drugs according to the Biopharmaceutical Classification System means that the low permeability across the intestinal epithelium is the rate-limited step for their oral absorption. Cationic chitosan nanoparticles have been found to open the tight junctions between epithelial cells. On the other hand, bioadhesive delivery devices could prolong the gastrointestinal residence time. In the present study, we developed a novel nano-reservoir bioadhesive tablets that combining the advantages of cationic nanoparticles and bioadhesive delivery devices anticipated achieving effective transport of sufficient protein drugs across the intestinal epithelium...
January 23, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28112546/characteristics-and-roles-of-exosomes-in-cardiovascular-disease
#8
Yuan Zhang, Yan-Wei Hu, Lei Zheng, Qian Wang
Exosomes are nano-sized biological membrane-enclosed vesicles that contain a cell-specific cargo of proteins, lipids, and nucleic acids that are released and taken up by most cell types, thereby inducing expression and functional changes via horizontal transfer of cargos between cells. Thus, exosomes present a largely unknown "cell-to-cell" communication system, which is now increasingly being investigated for diagnostic and therapeutic use in cardiovascular disease (CVD). The purpose of this review is to summarize recent findings on the properties and roles of exosomes in a variety of physiological and pathological settings related to CVD...
January 23, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28110173/tuning-physical-properties-and-bmp-2-release-rates-of-injectable-hydrogel-systems-for-an-optimal-bone-regeneration-effect
#9
Bo-Bae Seo, Jeong-Tae Koh, Soo-Chang Song
For a substance to be used as a drug delivery carrier and tissue inducible material for a target disease, its drug release rate and physical properties should be optimized to facilitate the healing process. We developed multi-tunable hydrogel systems with various physical properties and release behaviors to determine the optimal conditions for bone regeneration. Five injectable poly(phosphazene) hydrogels were developed with different types and amounts of anionic side-chains. The five polymer hydrogels showed considerably different in vitro and in vivo performances for sol-gel phase transition, dissolution/degradation, water uptake, and pore size...
January 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28073120/nano-pelargonidin-protects-hyperglycemic-induced-l6-cells-against-mitochondrial-dysfunction
#10
Asmita Samadder, Debojyoti Tarafdar, Suresh K Abraham, Kumaresh Ghosh, Anisur Rahman Khuda-Bukhsh
Nano-encapsulation of several natural products has become an important tool in enhancing the bioavailability of some modern drugs against many diseases. Pelargonidin is an anthocyanidin found in many fruits and vegetables. Pelargonidin is loaded with poly-lactide-co-glycolic-acid, a non-toxic biodegradable polymer, to produce nano-pelargonidin. Size, morphology, zeta potential, and planar uniformity of formulated nano-pelargonidin were determined by atomic force microscopy and dynamic light scattering. The time required for cellular entry, folds of nano-pelargonidin, and drug encapsulation efficiency of poly-lactide-co-glycolic-acid were also ascertained...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28059515/fusogenic-liposomes-as-nanocarriers-for-the-delivery-of-intracellular-proteins
#11
Sarah Kube, Nils Hersch, Elena Naumovska, Thomas Gensch, Johnny Hendriks, Arne Franzen, Lisa Landvogt, Jan-Peter Siebrasse, Ulrich Kubitscheck, Bernd Hoffmann, Rudolf Merkel, Agnes Csiszár
Direct delivery of proteins and peptides into living mammalian cells has been accomplished using phospholipid liposomes as carrier particles. Such liposomes are usually taken up via endocytosis where the main part of their cargo is degraded in lysosomes before reaching its destination. Here, fusogenic liposomes, a newly developed molecular carrier system, were used for protein delivery. When such liposomes were loaded with water-soluble proteins and brought into contact with mammalian cells, the liposomal membrane efficiently fused with the cellular plasma membrane delivering the liposomal content to the cytoplasm without degradation...
January 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28056402/engineering-hepatitis-b-virus-core-particles-for-targeting-her2-receptors-in%C3%A2-vitro-and-in%C3%A2-vivo
#12
Izzat Fahimuddin Bin Mohamed Suffian, Julie Tzu-Wen Wang, Naomi O Hodgins, Rebecca Klippstein, Mitla Garcia-Maya, Paul Brown, Yuya Nishimura, Hamed Heidari, Sara Bals, Jane K Sosabowski, Chiaki Ogino, Akihiko Kondo, Khuloud T Al-Jamal
Hepatitis B Virus core (HBc) particles have been studied for their potential as drug delivery vehicles for cancer therapy. HBc particles are hollow nano-particles of 30-34 nm diameter and 7 nm thick envelopes, consisting of 180-240 units of 21 kDa core monomers. They have the capacity to assemble/dis-assemble in a controlled manner allowing encapsulation of various drugs and other biomolecules. Moreover, other functional motifs, i.e. receptors, receptor binding sequences, peptides and proteins can be expressed...
March 2017: Biomaterials
https://www.readbyqxmd.com/read/28031711/synergistic-anti-glioma-effect-of-a-coloaded-nano-drug-delivery-system
#13
Huae Xu, Feng Jia, Pankaj Kumar Singh, Shu Ruan, Hao Zhang, Xiaolin Li
The anti-glioma effect of temozolomide (Tem) is sometimes undermined by the emerging resistance. Recently, resveratrol (Res), herbal medicine extracted from grape seeds, has been demonstrated for its potential use in chemosensitization. In the current study, both these drugs were loaded simultaneously into nanoparticles with methoxy poly(ethylene glycol)-poly epsilon caprolactone (mPEG-PCL) as drug carriers in order to achieve better antitumor efficiency. Tem/Res-coloaded mPEG-PCL nanoparticles were constructed, characterized, and tested for antitumor effect on glioma cells by using in vitro and xenograft model system...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28017159/target-recognition-molecules-and-molecular-modeling-studies
#14
Burcu Çulhaoğlu, Atilla Akdemir
Targeted delivery systems aim to deliver drugs to their intended site of action and as such they are expected to show more desired effects and less unwanted effects. The system itself is composed of a vesicle-encapsulated drug with "target recognition molecules" on the envelop. Ideally, these target recognition molecules, being either small non-peptidic molecules or peptides, are basically high-affinity ligands for a receptor or other protein that is expressed specifically and at high concentrations on the target cells...
December 21, 2016: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28011379/heart-targeted-nanoliposomal-nanoparticles-drug-delivery-an-updated-review
#15
REVIEW
Mostafa Cheraghi, Babak Negahdari, Hadis Daraee, Ali Eatemadi
Nanoliposomes are type of nano-sized vesicles made of bi-layered phospholipid membranes with an aqueous interior. They have been demonstrated to deliver several materials like low molecular weight drugs, imaging agents, peptides, proteins, and nucleic acids. Nanoliposomes have been demonstrated to slowly release an encapsulated drug, thereby leading to sustained exposure to target region and improved efficacy. This ability of nano-liposomes can be harnessed to deliver therapeutic agents precisely to the infarcted heart...
February 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27989830/hydrogel-based-approaches-for-cardiac-tissue-engineering
#16
Laura Saludas, Simon Pascual-Gil, Felipe Prósper, Elisa Garbayo, María Blanco-Prieto
Heart failure still represents the leading cause of death worldwide. Novel strategies using stem cells and growth factors have been investigated for effective cardiac tissue regeneration and heart function recovery. However, some major challenges limit their translation to the clinic. Recently, biomaterials have emerged as a promising approach to improve delivery and viability of therapeutic cells and proteins for the regeneration of the damaged heart. In particular, hydrogels are considered one of the most promising vehicles...
October 29, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27987773/scaffolds-of-hydroxyl-apatite-nanoparticles-disseminated-in-1-6-diisocyanatohexane-extended-poly-1-4-butylene-succinate-poly-methyl-methacrylate-for-bone-tissue-engineering
#17
Kulwinder Kaur, K J Singh, Vikas Anand, Gaurav Bhatia, Raminderjit Kaur, Manpreet Kaur, Lovedeep Nim, Daljit Singh Arora
Poly(1, 4-butyl succinate) extended 1, 6-diisocyanatohexane (PBSu-DCH) polymers and Polymethylmethacrylate (PMMA) scaffolds decorated with nano hydroxyl apatite have been prepared and characterized for regeneration of bone in cranio-maxillofacial region. Synthesized scaffolds revealed good response in bone regeneration and excellent cell viability in comparison to commercial available glass plate, which lead to better proliferation of MG-63 cell lines. Additionally, they demonstrate high porosity and excellent water retention ability...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27966794/diagnostic-and-therapeutic-potential-of-exosomes-in-cancer-the-beginning-of-a-new-tale
#18
REVIEW
Hamed Mirzaei, Amirhossein Sahebkar, Mahmoud Reza Jaafari, Mohammad Goodarzi, Hamid Reza Mirzaei
Exosomes have emerged as one of the main players in intercellular communication. These small nano-sized particles have many roles in various physiological pathways in normal and abnormal cells. Exosomes can carry various cargos such as proteins, mRNAs and miRNAs to recipient cells. Uptake of exosomes and their cargo can induce and/or inhibit different cellular and molecular pathways that lead to the alteration of cell behavior. Multiple lines of evidence have indicated that exosomes released from cancer cells can effect development of cancer in different stages...
December 14, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27940164/rankl-release-from-self-assembling-nanofiber-hydrogels-for-inducing-osteoclastogenesis-in-vitro
#19
James Z Xing, Lei Lu, Larry D Unsworth, Paul W Major, Michael R Doschak, Neelambar R Kaipatur
PURPOSE: To develop a nanofiber hydrogel (NF-hydrogel) for sustained and controlled release of the recombinant receptor activator of NF-kB ligand; (RANKL) and to characterize the release kinetics and bioactivity of the released RANKL. METHODS: Various concentrations of fluorescently-labelled RANKL protein were added to NF-hydrogels, composed of Acetyl-(Arg-Ala-Asp-Ala)4-CONH2 [(RADA)4] of different concentrations, to investigate the resulting in vitro release rates...
December 7, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27932881/preparation-and-antitumor-evaluation-of-self-assembling-oleanolic-acid-loaded-pluronic-p105-d-%C3%AE-tocopheryl-polyethylene-glycol-succinate-mixed-micelles-for-non-small-cell-lung-cancer-treatment
#20
Hao Wu, Qingxiang Zhong, Rongling Zhong, Houcai Huang, Zhi Xia, Zhongcheng Ke, Zhenhai Zhang, Jie Song, Xiaobin Jia
Oleanolic acid (OA) is a triterpenoid found in various fruits and vegetables and used in traditional Chinese medicine. OA plays a crucial role in the treatment of several cancers, but poor water solubility, low permeability, and significant efflux have limited its widespread clinical use. Vitamin E-d-α-tocopheryl polyethylene glycol succinate (vitamin E-TPGS) and Pluronic P105 were used to improve the solubility and permeability and to decrease the efflux of OA. OA-loaded mixed micelles were prepared by ethanol thin-film hydration...
2016: International Journal of Nanomedicine
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