scholarly journals Magnetically Controlled Carbonate Nanocomposite with Ciprofloxacin for Biofilm Eradication

2021 ◽  
Vol 22 (12) ◽  
pp. 6187
Author(s):  
Viktoriya Rumyantceva ◽  
Valeriya Rumyantceva ◽  
Yulia Andreeva ◽  
Sofia Tsvetikova ◽  
Anton Radaev ◽  
...  
Keyword(s):  
Targeted Delivery ◽  
Acute Inflammation ◽  
Release Profile ◽  
High Resistivity ◽  
Stimuli Responsive ◽  
Triggered Release ◽  
E Coli ◽  
Low Efficiency ◽  
Rf Magnetic Field ◽  
Complicated Task

Biofilms are the reason for a vast majority of chronic inflammation cases and most acute inflammation. The treatment of biofilms still is a complicated task due to the low efficiency of drug delivery and high resistivity of the involved bacteria to harmful factors. Here we describe a magnetically controlled nanocomposite with a stimuli-responsive release profile based on calcium carbonate and magnetite with an encapsulated antibiotic (ciprofloxacin) that can be used to solve this problem. The material magnetic properties allowed targeted delivery, accumulation, and penetration of the composite in the biofilm, as well as the rapid triggered release of the entrapped antibiotic. Under the influence of an RF magnetic field with a frequency of 210 kHz, the composite underwent a phase transition from vaterite into calcite and promoted the release of ciprofloxacin. The effectiveness of the composite was tested against formed biofilms of E. coli and S. aureus and showed a 71% reduction in E. coli biofilm biomass and an 85% reduction in S. aureus biofilms. The efficiency of the composite with entrapped ciprofloxacin was higher than for the free antibiotic in the same concentration, up to 72%. The developed composite is a promising material for the treatment of biofilm-associated inflammations.

The Smart Dual-Stimuli Responsive Nanoparticles for Controlled AntiTumor Drug Release and Cancer Therapy

2020 ◽  
Vol 20 ◽  
Author(s):  
Feng Wu ◽  
Fei Qiu ◽  
Siew Anthony Wai-Keong ◽  
Yong Diao
Keyword(s):  
Drug Delivery ◽  
Cancer Therapy ◽  
Drug Release ◽  
Targeted Delivery ◽  
Relevant Information ◽  
Therapeutic Effects ◽  
Stimuli Responsive ◽  
Control Effect ◽  
Chemotherapy Drugs ◽  
Excellent Control

Background: In recent years, the emergence of stimuli-responsive nanoparticles makes drug delivery more efficient. As an intelligent and effective targeted delivery platform, it can reduce the side effects generated during drug transportation while enhancing the treatment efficacy. The stimuli-responsive nanoparticles can respond to different stimuli at corresponding times and locations to deliver and release their drugs and associated therapeutic effects. Objective: This review aims to inform researchers on the latest advances in the application of dual-stimuli responsive nanoparticles in precise drug delivery, with special attention to their design, drug release properties, and therapeutic effects. Syntheses of nanoparticles with simultaneous or sequential responses to two or more stimuli (pH-redox, pH-light, redoxlight, temperature-magnetic, pH-redox-temperature, redox-enzyme-light, etc.) and the applications of such responsivity properties for drugs control and release have become a hot topic of recent research. Methods: A database of relevant information for the production of this review was sourced, screened and analyzed from Pubmed, Web of Science, SciFinder by searching for the following keywords: “dual-stimuli responsive”, “controlled release”, “cancer therapy”, “synergistic treatment”. Results: Notably, the nanoparticles with dual-stimuli responsive function have an excellent control effect on drug delivery and release, playing a crucial part in the treatment of tumors. They can improve the encapsulation and delivery efficiency of hydrophobic chemotherapy drugs, combine chemo-photothermal therapies, apply imaging function in the diagnosis of tumors and even conduct multi-drugs delivery to overcome multi-drugs resistance (MDR). Conclusion: With the development of smart dual-stimuli responsive nanoparticles, cancer treatment methods will become more diverse and effective. All the stimuli-responsive nanoparticles functionalities exhibited their characteristics individually within the single nanosystem.

Oxidation and ATP dual-responsive block copolymer containing tertiary sulfoniums: self-assembly, protein complexation and triggered release

2021 ◽  
Author(s):  
Yanfen Jiang ◽  
Shuqi Dong ◽  
Guoyang Qin ◽  
Li Liu ◽  
Hanying Zhao
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Phenylboronic Acid ◽  
Cationic Polymer ◽  
Release Profile ◽  
Triggered Release ◽  
Dual Responsive ◽  
Protein Complexation

Alkylation of thioether-containing block copolymer simultaneously incorporated sulfoniums and phenylboronic acid moieties. The co-assembly of this cationic polymer and protein generated micelles with an H2O2-and ATP-responsive release profile.

Self-assembled peptide and protein nanostructures for anti-cancer therapy: Targeted delivery, stimuli-responsive devices and immunotherapy

Nano Today ◽  
2021 ◽  
Vol 38 ◽  
pp. 101119
Author(s):  
Masoud Delfi ◽  
Rossella Sartorius ◽  
Milad Ashrafizadeh ◽  
Esmaeel Sharifi ◽  
Yapei Zhang ◽  
...  
Keyword(s):  
Cancer Therapy ◽  
Targeted Delivery ◽  
Stimuli Responsive ◽  
Anti Cancer ◽  
Self Assembled

pH-Triggered release of gemcitabine from polymer coated nanodiamonds fabricated by RAFT polymerization and copper free click chemistry

2016 ◽  
Vol 7 (40) ◽  
pp. 6220-6230 ◽  
Author(s):  
Haiwang Lai ◽  
Mingxia Lu ◽  
Hongxu Lu ◽  
Martina H. Stenzel ◽  
Pu Xiao
Keyword(s):  
Drug Delivery ◽  
Pancreatic Cancer ◽  
Click Chemistry ◽  
Raft Polymerization ◽  
Stimuli Responsive ◽  
Triggered Release

Prodrug (gemcitabine)-based polymer coated nanodiamonds as stimuli-responsive drug delivery platforms for the treatment of pancreatic cancer.

scholarly journals Encapsulation and Ultrasound-Triggered Release of G-Quadruplex DNA in Multilayer Hydrogel Microcapsules

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1342 ◽  
Author(s):  
Aaron Alford ◽  
Brenna Tucker ◽  
Veronika Kozlovskaya ◽  
Jun Chen ◽  
Nirzari Gupta ◽  
...  
Keyword(s):  
Nucleic Acids ◽  
Defense Mechanisms ◽  
The Body ◽  
Stimuli Responsive ◽  
Triggered Release ◽  
Quadruplex Dna ◽  
Nucleic Acid Therapeutics ◽  
Wide Range ◽  
G Quadruplex ◽  
Hydrogel Capsules

Nucleic acid therapeutics have the potential to be the most effective disease treatment strategy due to their intrinsic precision and selectivity for coding highly specific biological processes. However, freely administered nucleic acids of any type are quickly destroyed or rendered inert by a host of defense mechanisms in the body. In this work, we address the challenge of using nucleic acids as drugs by preparing stimuli responsive poly(methacrylic acid)/poly(N-vinylpyrrolidone) (PMAA/PVPON)n multilayer hydrogel capsules loaded with ~7 kDa G-quadruplex DNA. The capsules are shown to release their DNA cargo on demand in response to both enzymatic and ultrasound (US)-triggered degradation. The unique structure adopted by the G-quadruplex is essential to its biological function and we show that the controlled release from the microcapsules preserves the basket conformation of the oligonucleotide used in our studies. We also show that the (PMAA/PVPON) multilayer hydrogel capsules can encapsulate and release ~450 kDa double stranded DNA. The encapsulation and release approaches for both oligonucleotides in multilayer hydrogel microcapsules developed here can be applied to create methodologies for new therapeutic strategies involving the controlled delivery of sensitive biomolecules. Our study provides a promising methodology for the design of effective carriers for DNA vaccines and medicines for a wide range of immunotherapies, cancer therapy and/or tissue regeneration therapies in the future.

scholarly journals Pharmaceutical Aspects of Nanocarriers for Smart Anticancer Therapy

Pharmaceutics ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1875
Author(s):  
Seung Rim Hwang ◽  
Kushal Chakraborty ◽  
Jeong Man An ◽  
Jagannath Mondal ◽  
Hong Yeol Yoon ◽  
...  
Keyword(s):  
Targeted Delivery ◽  
Human Cancer ◽  
Chemical Properties ◽  
Controlled Drug Release ◽  
Anticancer Therapy ◽  
Electrospinning Process ◽  
Surface Shape ◽  
Stimuli Responsive ◽  
Tumor Microenvironments ◽  
Drug Molecules

Drug delivery to tumor sites using nanotechnology has been demonstrated to overcome the drawbacks of conventional anticancer drugs. Altering the surface shape and geometry of nanocomposites alters their chemical properties, which can confer multiple attributes to nanocarriers for the treatment of cancer and their use as imaging agents for cancer diagnosis. However, heterogeneity and blood flow in human cancer limit the distribution of nanoparticles at the site of tumor tisues. For targeted delivery and controlled release of drug molecules in harsh tumor microenvironments, smart nanocarriers combined with various stimuli-responsive materials have been developed. In this review, we describe nanomaterials for smart anticancer therapy as well as their pharmaceutical aspects including pharmaceutical process, formulation, controlled drug release, drug targetability, and pharmacokinetic or pharmacodynamic profiles of smart nanocarriers. Inorganic or organic-inorganic hybrid nanoplatforms and the electrospinning process have also been briefly described here.

scholarly journals ЕТІОЛОГІЧНА СТРУКТУРА ГОСТРИХ ШЛУНКОВО–КИШКОВИХ ЗАХВОРЮВАНЬ ТЕЛЯТ

2016 ◽  
Vol 18 (3(71)) ◽  
pp. 148-151
Author(s):  
A. Berezovskyi ◽  
T. Fotyna ◽  
L. Ulko ◽  
A. Nechyporenko ◽  
E. Tytov
Keyword(s):  
Biological Material ◽  
Gastrointestinal Disease ◽  
Gastrointestinal Diseases ◽  
Important Place ◽  
E Coli ◽  
Leading Role ◽  
Highly Active ◽  
Opportunistic Bacteria ◽  
Antibiotic Drugs ◽  
Low Efficiency

The results of tests of samples of biological material from the calves with acute gastrointestinal diseases presents in the article. It was found that the occurrence and development of acute gastrointestinal diseases the leading role played by opportunistic bacteria association: S. aureus, S. saprophiticus, S. agalactiae, S. faecalis, S. pyogenes, E. coli, E. cloacae, C. jejuni, P. vulgaris, P. mirabilis, P. aeruginosa and K. Pneumoniae. Of the 632 examinations we studied 2,786 samples of biological material. Analysis of the results on our diagnostic work shows that acute gastrointestinal disease in calves caused by microbial associations. At acute gastrointestinal disease isolated pathogen E. coli – 21.0%. Coccoid microorganisms group also had significant representation. Thus, a biomaterial of 15.5% was allocated S. faecalis, at 11.6% was allocated pathogen S. aureus. Although to a lesser extent, but large office in the species spectrum of microorganisms by acute gastrointestinal diseases of calves occupied S. agalactiae – 4.8%, S. saprophiticus – 4.6%, S. pyogenes – 3.7%. Among the important place occupied microorganisms culture P. vulgaris – 8.5% of the total allocation of the samples. The average discharge frequency was characteristic for Campylobacter jejuni – 6.5% of cases.In analyzing the sensitivity of microorganisms isolated from calves with acute gastro–intestinal diseases to different groups of antibiotic drugs found that E. coli has a low sensitivity to antibiotics almost all studied groups. The largest number of selected crops susceptible to cephalosporins – 74.8%. Most of the isolated cultures weaklysensitive or insensitive to antibiotics studied by us. These data are an indication of the spread of antibiotic–resistant strains of microorganisms among newborn calves in the farms of Sumy and Chernihiv regions, which explains the low efficiency of antibiotic therapy. Highly active towards crop S. aureus, S. saprophiticus, S. agalactiae, S. faecalis, S. pyogenes, E. coli, E. cloacae, C. jejuni, P. vulgaris, P. mirabilis, P. aeruginosa, and K. pneumoniae were drug «Ceftioklin» and combined antibacterial agents. 

Magnetically controlled release of recombinant tissue plasminogen activator from chitosan nanocomposites for targeted thrombolysis

2016 ◽  
Vol 4 (15) ◽  
pp. 2578-2590 ◽  
Author(s):  
Jyh-Ping Chen ◽  
Chih-Hsin Liu ◽  
Hao-Lung Hsu ◽  
Tony Wu ◽  
Yu-Jen Lu ◽  
...  
Keyword(s):  
Controlled Release ◽  
Plasminogen Activator ◽  
Tissue Plasminogen Activator ◽  
Targeted Delivery ◽  
Chitosan Nanoparticles ◽  
Recombinant Tissue Plasminogen Activator ◽  
Triggered Release ◽  
Magnetic Chitosan ◽  
Tissue Plasminogen ◽  
Thrombolysis Therapy

Targeted delivery and triggered release of rtPA-encapsulated magnetic chitosan nanoparticles with the guidance of a magnet could be used for remote-controlled thrombolysis therapy.

scholarly journals New Protein Vector ApE1 for Targeted Delivery of Anticancer Drugs

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
N. V. Pozdniakova ◽  
N. V. Gorokhovets ◽  
N. V. Gukasova ◽  
A. V. Bereznikova ◽  
E. S. Severin
Keyword(s):  
Targeted Delivery ◽  
Tumor Targeting ◽  
Drug Loading ◽  
Bacterial Biomass ◽  
Receptor Binding Domain ◽  
Producer Strain ◽  
E Coli ◽  
Cytotoxic Compound ◽  
Soluble State ◽  
New Protein

A new chimeric geneApE1encoding the receptor-binding domain of the humanalpha-fetoprotein fused to a sequence of 22 glutamic acid residues was constructed. A new bacterial producer strainE. coliSHExT7 ApE1 was selected for ApE1 production in a soluble state. A simplified method was developed to purify ApE1 from bacterial biomass. It was shown that the new vector protein selectively interacts with AFP receptors on the tumor cell surface and can be efficiently accumulated in tumor cells. In addition, ApE1 was shown to be stable in storage and during its chemical modification. An increased number of carboxyl groups in the molecule allows the production of cytotoxic compound conjugates with higher drug-loading capacity and enhanced tumor targeting potential.

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