scholarly journals Functionality and Acceptance of the EsoCap System—A Novel Film-Based Drug Delivery Technology: Results of an In Vivo Study

Pharmaceutics ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 828
Author(s):  
Christoph Rosenbaum ◽  
Michael Grimm ◽  
Julius Krause ◽  
Adrian Rump ◽  
Rebecca Kessler ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Polymer Film ◽  
Esophageal Mucosa ◽  
Esophageal Diseases ◽  
System A ◽  
Mri Scans ◽  
Novel Drug ◽  
First Time ◽  
Delivery Technology

There are no methods for specific local application of active substances to the mucosa of the esophagus to treat eosinophilic esophagitis or other esophageal diseases. This publication describes the principal in vivo functionality and acceptance of a novel modular drug delivery concept, called EsoCap system, by 12 healthy volunteers. For the first time, the EsoCap system enables targeted placement on the esophageal mucosa of a mucoadhesive polymer film. Acceptance was determined by means of a standardized questionnaire after administration and functionality of the device by MRI scans. Two different setups of the EsoCap system were tested: one setup with a density of 0.4 g/cm3 and one with a density of 1.0 g/cm3. Acceptability of the dosage form was also confirmed in addition to functionality, by measuring the applied film length. It was found that acceptance of the variant with the higher density was significantly better. This novel drug delivery technology could enable a targeted, local and long-lasting therapy of the esophagus for the first time, depending on the polymer film used.

Development and evaluation of a novel drug delivery: Soluplus®/TPGS mixed micelles loaded with piperine in vitro and in vivo

2018 ◽  
Vol 44 (9) ◽  
pp. 1409-1416 ◽  
Author(s):  
Yingying Ding ◽  
Changyuan Wang ◽  
Yutong Wang ◽  
Youwei Xu ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mixed Micelles ◽  
Novel Drug

scholarly journals Development of Antibody–Oligonucleotide Complexes for Targeting Exosomal MicroRNA

Pharmaceutics ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 545 ◽  
Author(s):  
Asako Yamayoshi ◽  
Shota Oyama ◽  
Yusuke Kishimoto ◽  
Ryo Konishi ◽  
Tsuyoshi Yamamoto ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Inhibitory Effects ◽  
Exosomal Mirnas ◽  
Functional Inhibition ◽  
Novel Drug Delivery System ◽  
Exosomal Mirna ◽  
Novel Drug ◽  
Exosomal Microrna

MicroRNAs in exosomes (exosomal miRNAs) are considered as significant targets for cancer therapy. Anti-miR oligonucleotides are often used for the functional inhibition of miRNAs; however, there are no studies regarding the regulation of exosomal miRNA functions. In this study, we attempted to develop a novel drug delivery system using anti-exosome antibody–anti-miR oligonucleotide complexes (ExomiR-Tracker) to hijack exosomes to carry anti-miR oligonucleotides inside exosome-recipient cells. We found that ExomiR-Tracker bound to the exosomes, and then the complexes were introduced into the recipient cells. We also found that anti-miR oligonucleotides introduced into the recipient cells can exhibit inhibitory effects on exosomal miRNA functions in vitro and in vivo. We believe that our strategy would be a promising one for targeting exosomal miRNAs.

scholarly journals The TAT Protein Transduction Domain as an Intra-Articular Drug Delivery Technology

Cartilage ◽  
2020 ◽  
pp. 194760352095939
Author(s):  
Sarah E. Mailhiot ◽  
Matthew A. Thompson ◽  
Akiko E. Eguchi ◽  
Sabrina E. Dinkel ◽  
Martin K. Lotz ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Genetic Recombination ◽  
Great Promise ◽  
Tat Protein ◽  
Binding Studies ◽  
Osteoarthritic Cartilage ◽  
Peptide Transduction ◽  
Delivery Technology

Objective Intra-articular drug delivery holds great promise for the treatment of joint diseases such as osteoarthritis. The objective of this study was to evaluate the TAT peptide transduction domain (TAT-PTD) as a potential intra-articular drug delivery technology for synovial joints. Design Experiments examined the ability of TAT conjugates to associate with primary chondrocytes and alter cellular function both in vitro and in vivo. Further experiments examined the ability of the TAT-PTD to bind to human osteoarthritic cartilage. Results The results show that the TAT-PTD associates with chondrocytes, is capable of delivering siRNA for chondrocyte gene knockdown, and that the recombinant enzyme TAT-Cre is capable of inducing in vivo genetic recombination within the knee joint in a reporter mouse model. Last, binding studies show that osteoarthritic cartilage preferentially uptakes the TAT-PTD from solution. Conclusions The results suggest that the TAT-PTD is a promising delivery strategy for intra-articular therapeutics.

Mirena® (Levonorgestrel intrauterine system): A successful novel drug delivery option in contraception

2009 ◽  
Vol 61 (10) ◽  
pp. 808-812 ◽  
Author(s):  
Susan Rose ◽  
Angela Chaudhari ◽  
C. Matthew Peterson
Keyword(s):  
Drug Delivery ◽  
System A ◽  
Novel Drug

scholarly journals Effects of Atelocollagen Formulation Containing Oligonucleotide on Endothelial Permeability

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Koji Hanai ◽  
Takashi Kojima ◽  
Mika Ota ◽  
Jun Onodera ◽  
Norimasa Sawada
Keyword(s):  
Drug Delivery ◽  
Size Structure ◽  
Biological Effects ◽  
Adherens Junction ◽  
Endothelial Permeability ◽  
Molecular Size ◽  
P38 Map Kinase ◽  
Delivery Technology ◽  
Junction Proteins

Atelocollagen is a major animal protein that is used as a highly biocompatible biomaterial. To date, atelocollagen has been used as an effective drug delivery technology to sustain the release of antitumor proteins and to enhance the antitumor activity of oligonucleotides in in vivo models. However, the biological effects of this technology are not fully understood. In the present study, we investigated the effects of atelocollagen on endothelial paracellular barrier function. An atelocollagen formulation containing oligonucleotides specifically increased the permeability of two types of endothelial cells, and the change was dependent on the molecular size, structure of the oligonucleotides used and the concentrations of the oligonucleotide and atelocollagen in the formulation. An immunohistochemical examination revealed that the formulation had effects on the cellular skeleton and intercellular structure although it did not affect the expression of adherens junction or tight junction proteins. These changes were induced through p38 MAP kinase signaling. It is important to elucidate the biological functions of atelocollagen in order to be able to exploit its drug delivery properties.

A Novel Drug Delivery System: A Biodegradable Gel for the Treatment of Inner Ear Diseases

2004 ◽  
Vol 131 (2) ◽  
pp. P260-P260 ◽  
Author(s):  
Tsuyoshi Endo ◽  
Takayuki Nakagawa ◽  
Tomoko Kita ◽  
Tae Soo Kim ◽  
Fukuichiro Iguchi ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Inner Ear ◽  
Drug Delivery System ◽  
Delivery System ◽  
Ear Diseases ◽  
System A ◽  
Novel Drug Delivery System ◽  
Novel Drug

scholarly journals Study of the Dynamic Uptake of Free Drug and Nanostructures for Drug Delivery Based on Bioluminescence Measurements

2017 ◽  
Vol 2017 ◽  
pp. 1-12
Author(s):  
Zhongjian Fang ◽  
Houchao Xu ◽  
Xiangjun Ji ◽  
Congbiao Liu ◽  
Kai Wang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Carriers ◽  
Multicellular Tumor Spheroid ◽  
The Past ◽  
Loading Methods ◽  
Model Drug ◽  
Novel Drug ◽  
Liposomal Drugs ◽  
Great Growth

The past two decades have witnessed the great growth of the development of novel drug carriers. However, the releasing dynamics of drug from drug carriers in vivo and the interactions between cells and drug carriers remain unclear. In this paper, liposomes were prepared to encapsulate D-luciferin, which was the substrate of luciferase and served as a model drug. Based on the theoretical calculation of active loading, methods of preparation for liposomes were optimized. Only when D-luciferin was released from liposomes or taken in by the cells could bioluminescence be produced under the catalysis of luciferase. Models of multicellular tumor spheroid (MCTS) were built with 4T1-luc cells that expressed luciferase stably. The kinetic processes of uptake and distribution of free drugs and liposomal drugs were determined with models of cell suspension, monolayer cells, MCTS, and tumor-bearing nude mice. The technology platform has been demonstrated to be effective for the study of the distribution and kinetic profiles of various liposomes as drug delivery systems.

scholarly journals Recently Investigated Natural Gums and Mucilages as Pharmaceutical Excipients: An Overview

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Pritam Dinesh Choudhary ◽  
Harshal Ashok Pawar
Keyword(s):  
Drug Delivery ◽  
Drug Absorption ◽  
Drug Delivery Systems ◽  
Chemical Constituents ◽  
Dosage Forms ◽  
Polymeric Compounds ◽  
Recent Trends ◽  
Natural Drugs ◽  
Novel Drug ◽  
Delivery Technology

Due to advances in drug delivery technology, currently, excipients are included in novel dosage forms to fulfil specific functions and in some cases they directly or indirectly influence the extent and/or rate of drug release and drug absorption. Recent trends towards use of plant based and natural products demand the replacement of synthetic additives with natural ones. Today, the whole world is increasingly interested in natural drugs and excipients. These natural materials have many advantages over synthetic ones as they are chemically inert, nontoxic, less expensive, biodegradable, and widely available. This review discusses majority of the plant-derived polymeric compounds (gums and mucilage’s), their sources, chemical constituents, uses, and some recent investigations as excipients in novel drug delivery systems.

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