Polyacrylic acid@zeolitic imidazolate framework-8 nanoparticles with ultrahigh drug loading capability for pH-sensitive drug release

2014 ◽  
Vol 50 (8) ◽  
pp. 1000-1002 ◽  
Author(s):  
Hong Ren ◽  
Lingyu Zhang ◽  
Jiping An ◽  
Tingting Wang ◽  
Lu Li ◽  
...  
Keyword(s):  
Drug Release ◽  
Polyacrylic Acid ◽  
Drug Loading ◽  
Ph Sensitive ◽  
Zeolitic Imidazolate Framework

scholarly journals pH-triggered degradation and release of doxorubicin from zeolitic imidazolate framework-8 (ZIF8) decorated with polyacrylic acid

RSC Advances ◽  
2021 ◽  
Vol 11 (16) ◽  
pp. 9222-9234
Author(s):  
Vy Anh Tran ◽  
Sang-Wha Lee
Keyword(s):  
Drug Release ◽  
Polyacrylic Acid ◽  
Acidic Ph ◽  
Zeolitic Imidazolate Framework ◽  
Triggered Drug Release

The ZIF8–Dox@PAA nanocarrier demonstrated pH-triggered drug release through the detachment of the PAA layer along with the destruction of ZIF8 framework in acidic pH environment.

scholarly journals ATRP-based synthesis of a pH-sensitive amphiphilic block polymer and its self-assembled micelles with hollow mesoporous silica as DOX carriers for controlled drug release

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 29986-29996
Author(s):  
Xiuxiu Qi ◽  
Hongmei Yan ◽  
Yingxue Li
Keyword(s):  
Controlled Release ◽  
Drug Release ◽  
Self Assembly ◽  
Drug Loading ◽  
Controlled Drug Release ◽  
Ph Sensitive ◽  
Core Shell ◽  
Assembly Process ◽  
Block Polymer ◽  
Hollow Mesoporous Silica

A pH-sensitive core–shell nanoparticle (HMS@C18@PSDMA-b-POEGMA) was developed via a self-assembly process as the carrier of anticancer drug doxorubicin (DOX) for drug loading and controlled release.

Colon targeted drug release studies of 5-ASA using a novel pH sensitive polyacrylic acid grafted barley

2017 ◽  
Vol 74 (8) ◽  
pp. 3431-3453 ◽  
Author(s):  
Kartick Prasad Dey ◽  
Sumit Mishra ◽  
Nilendu Chandra
Keyword(s):  
Drug Release ◽  
Polyacrylic Acid ◽  
Ph Sensitive ◽  
Release Studies ◽  
Targeted Drug

Core–shell noble-metal@zeolitic-imidazolate-framework nanocarriers with high cancer treatment efficiency in vitro

2019 ◽  
Vol 7 (7) ◽  
pp. 1050-1055 ◽  
Author(s):  
Liangcan He ◽  
Kanglei Pang ◽  
Wenwen Liu ◽  
Yue Tian ◽  
Lin Chang ◽  
...  
Keyword(s):  
Drug Release ◽  
Cancer Treatment ◽  
Drug Loading ◽  
Controlled Drug Release ◽  
Core Shell ◽  
Treatment Efficiency ◽  
Zeolitic Imidazolate Framework ◽  
High Drug ◽  
High Drug Loading

Core–shell Au@zeolitic-imidazolate-framework nanocarriers with high drug-loading, controlled drug release properties, and high cancer treatment efficiency.

Combine Drug Delivery of Thymoquinone-Doxorubicin by Cockle Shellderived pH-sensitive Aragonite CaCO3 Nanoparticles

2020 ◽  
Vol 10 (4) ◽  
pp. 518-533 ◽  
Author(s):  
Kehinde M. Ibiyeye ◽  
Abu B.Z. Zuki ◽  
Norshariza Nurdin ◽  
Mokrish Ajat
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Calcium Carbonate ◽  
Drug Release ◽  
Release Kinetics ◽  
Drug Loading ◽  
Ph Sensitive ◽  
Multiple Drug ◽  
Burst Release ◽  
Cockle Shell

Background: Cockleshell-derived aragonite calcium carbonate nanoparticles were prepared by the top-down approach for combine delivery of two types of drugs. Objective: The aim of this study was to synthesize and characterize thymoquinone-doxorubicin loaded cockle shell-derived aragonite calcium carbonate nanoparticle. Aragonite calcium carbonate nanoparticles encapsulating thymoquinone and doxorubicin alone were also prepared. Methods: The blank and drug-loaded nanoparticles were characterized by field emission scanning electron microscopy, transmission electron microscopy, Zeta potential, Fourier transformed infrared and X-ray diffraction. Drug delivery properties, in vitro drug release study at pH 7.4, 6 and 4.8, and effect of blank nanoparticles on MCF10A, 3T3, MDA MB231 cells were also analyzed. Results: The blank and drug-loaded nanoparticles were pleomorphic and their sizes varying from 53.65 ± 10.29 nm to 60.49 ± 11.36 nm with an overall negative charge. The entrapment efficiency of thymoquinone and doxorubicin were 41.6 and 95.8, respectively. The FTIR showed little alteration after loading thymoquinone and doxorubicin while XRD patterns revealed no changes in the crystallizations of nanoparticles after drug loading. The drug release kinetics of doxorubicin and thymoquinone from the nanoparticles showed a continuous and gradual release after an initial burst release was observed. At pH 4.8, about 100% of drug release was noticed, 70% at pH 6 while only 50% at pH 7.4. The cell viability was 80% at a concentration of 1000 ug/ml of blank nanoparticle. Conclusion: The cockle shell-derived pH sensitive aragonite calcium carbonate nanoparticle provides an effective and simple means of multiple drug delivery and function as a platform for pH controlled release of loaded therapeutic agents.

Gold embedded chitosan nanoparticles with cell membrane mimetic polymer coating for pH-sensitive controlled drug release and cellular fluorescence imaging

2020 ◽  
pp. 088532822095259
Author(s):  
Ke Ma ◽  
Yongbin Cheng ◽  
Xinran Wei ◽  
Daijun Chen ◽  
Xiaoli Zhao ◽  
...  
Keyword(s):  
Drug Release ◽  
Fluorescence Imaging ◽  
Colloidal Stability ◽  
Drug Loading ◽  
Tumor Therapy ◽  
Chitosan Nanoparticles ◽  
Fluorescence Emission ◽  
Controlled Drug Release ◽  
Ph Sensitive ◽  
One Pot

In this work, gold embedded chitosan nanoparticles (Au@CS NPs) were fabricated by a one-pot method. The benzaldehyde-terminated poly[(2-methacryloyloxy) ethyl phosphorylcholine] (PMPC) was applied to modification of the gold doped chitosan nanoparticles. The obtained Au@CS-PMPC NPs had the diameter of 135 nm with a narrow distribution. The size of the Au@CS-PMPC NPs, as well as the size of the embedded gold NPs, might be well-controlled by adjusting the feeding ratio between chitosan and HAuCl4. Furthermore, the Au@CS-PMPC NPs showed increased colloidal stability, high drug loading content, pH-responsive drug release, excellent biocompatibility and bright fluorescence emission. The results demonstrated that Au@CS-PMPC NPs showed a great potential for tumor therapy via the combination advantages of pH-sensitive controlled drug release and cellular fluorescence imaging.

scholarly journals THE ROLE OF NEEDLE IN FORMULATION OF pH SENSITIVE SWELLABLE MICROBEADS PREPARED WITH HYDROPHILIC POLYMERS FOR ATORVASTATIN AND THEIR CHARACTERIZATION STUDIES

2017 ◽  
Vol 9 (3) ◽  
pp. 20
Author(s):  
K.v. Ramana Reddy ◽  
M. V. Nagabhushanam
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Drug Loading ◽  
In Vitro Release ◽  
Process Variable ◽  
Ph Sensitive ◽  
Hydrophilic Polymers ◽  
Release Mechanism ◽  
Curing Agents

Objective: The aim of the study was to develop and characterize mucoadhesive microbeads for oral sustained release of atorvastatin by using hydrophilic polymers and application of different process variables in designing of pH sensitive swellable microbeads.Methods: Microbeads were prepared by ionic gelation method. The compatibility studies of atorvastatin with polymers were investigated by differential scanning calorimeter and fourier transform infrared spectroscopy studies. In this work process variable like optimization of curing agents and their quantity, effect of rpm, and their influence in drug entrapment were studied. Prepared beads were characterized for particle size, swelling index, erosion studies and drug release studies.Results: Mixture of alginate and carbopol 934 P at 3.3 % w/v shows sustained release and good mucoadhesive capacity. Furthermore, drug loading and swelling increased with the use of a combination of polymers. On basis of in vitro release studies and swelling studies, it was observed that sodium alginate coated with carbopol 934 P showed sustained release of 84.5 % at end of 10 h in 6.8 phosphate buffer. The optimised batch followed peppas and higuchi release mechanism and releasing the drug by non-fickian transport.Conclusion: The alginate beads with a combination of carbopol 934P showed a sustain release pattern. The release rate and swelling of atorvastatin beads could be adjusted by adding other hydrophilic polymers or by optimising curing agents, curing time and their volume. The zero order of drug release was confirmed for all the batches. The in vitro data was better fit to Higuchi’s diffusion model and diffusion rate limited.

Fabrication of pH sensitive microcapsules using soft templates and their application to drug release

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 51271-51277 ◽  
Author(s):  
Fan Yang ◽  
Shenghua Ma ◽  
Wei Zong ◽  
Nan Luo ◽  
Minlan Lv ◽  
...  
Keyword(s):  
Drug Release ◽  
Drug Loading ◽  
Ph Sensitive ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Assembly Technique ◽  
Layer Assembly ◽  
Soft Templates

The schematic depiction of the process preparing hollow microcapsules and drug loading via layer-by-layer assembly technique.

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