Preparation and anti-cancer activity of transferrin/folic acid double-targeted graphene oxide drug delivery system

2020 ◽  
Vol 35 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Taicheng Lu ◽  
Zhenzhen Nong ◽  
Liying Wei ◽  
Mei Wei ◽  
Guo Li ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Graphene Oxide ◽  
Folic Acid ◽  
Drug Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Drug Loading ◽  
Target Drug Delivery ◽  
Target Drug ◽  
Target Drug Delivery System

In this study, a transferrin/folic acid double-targeting graphene oxide drug delivery system loaded with doxorubicin was designed. Graphene oxide was prepared by ultrasound improved Hummers method and was modified with Pluronic F68, folic acid, and transferrin to decrease its toxicity and to allow dual-targeting. The results show that the double target drug delivery system (TFGP*DOX) has good and controllable drug delivery performance with no toxicity. Moreover, TFGP*DOX has a better inhibitory effect on SMMC-7721 cells than does a single target drug delivery system (FGP*DOX). The results of drug release analysis and cell inhibition studies showed that TFGP*DOX has a good sustained release function that can reduce the drug release rate in blood circulation over time and improve the local drug concentration in or near a targeted tumor. Therefore, the drug loading system (TFGP*DOX) has potential application value in the treatment of hepatocellular carcinoma.

scholarly journals TAT-modified serum albumin nanoparticles for sustained-release of tetramethylpyrazine and improved targeting to spinal cord injury

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Yan Lin ◽  
Yujie Wan ◽  
Xingjie Du ◽  
Jian Li ◽  
Jun Wei ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Spinal Cord ◽  
Drug Delivery System ◽  
Delivery System ◽  
Target Drug Delivery ◽  
Target Drug ◽  
Cord Injury ◽  
Target Drug Delivery System ◽  
Targeting Ability

Abstract Background Spinal Cord injury (SCI) is a kind of severe traumatic disease. The inflammatory response is a significant feature after SCI. Tetramethylpyrazine (TMP), a perennial herb of umbelliferae, is an alkaloid extracted from ligustici. TMP can inhibit the production of nitric oxide and reduce the inflammatory response in peripheral tissues. It can be seen that the therapeutic effect of TMP on SCI is worthy of affirmation. TMP has defects such as short half-life and poor water-solubility. In addition, the commonly used dosage forms of TMP include tablets, dropping pills, injections, etc., and its tissue and organ targeting is still a difficult problem to solve. To improve the solubility and targeting of TMP, here, we developed a nanotechnology-based drug delivery system, TMP-loaded nanoparticles modified with HIV trans-activator of transcription (TAT-TMP-NPs). Results The nanoparticles prepared in this study has integrated structure. The hemolysis rate of each group is less than 5%, indicating that the target drug delivery system has good safety. The results of in vivo pharmacokinetic studies show that TAT-TMP-NPs improves the bioavailability of TMP. The quantitative results of drug distribution in vivo show that TAT-TMP-NPs is more distributed in spinal cord tissue and had higher tissue targeting ability compared with other treatment groups. Conclusions The target drug delivery system can overcome the defect of low solubility of TMP, achieve the targeting ability, and show the further clinical application prospect.

scholarly journals Synthesis, Characterization, and Evaluation of a Novel Amphiphilic Polymer RGD-PEG-Chol for Target Drug Delivery System

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Shi Zeng ◽  
Fengbo Wu ◽  
Bo Li ◽  
Xiangrong Song ◽  
Yu Zheng ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Large Scale ◽  
Film Formation ◽  
Low Cost ◽  
Amphiphilic Polymer ◽  
Target Drug Delivery ◽  
H Nmr ◽  
Target Drug

An amphiphilic polymer RGD-PEG-Chol which can be produced in large scale at a very low cost has been synthesized successfully. The synthesized intermediates and final products were characterized and confirmed by1H nuclear magnetic resonance spectrum (1H NMR) and Fourier transform infrared spectrum (FT-IR). The paclitaxel- (PTX-) loaded liposomes based on RGD-PEG-Chol were then prepared by film formation method. The liposomes had a size within 100 nm and significantly enhanced the cytotoxicity of paclitaxel to B16F10 cell as demonstrated by MTT test (IC50= 0.079 μg/mL of RGD-modified PTX-loaded liposomes compared to 9.57 μg/mL of free PTX). Flow cytometry analysis revealed that the cellular uptake of coumarin encapsulated in the RGD-PEG-Chol modified liposome was increased for HUVEC cells. This work provides a reasonable, facile, and economic approach to prepare peptide-modified liposome materials with controllable performances and the obtained linear RGD-modified PTX-loaded liposomes might be attractive as a drug delivery system.

A Smart Drug Delivery System Based on Thermo-Responsive Polymer Gated Au NRs@SiO2 Nano-Platform

2021 ◽  
Vol 16 (7) ◽  
pp. 1029-1036
Author(s):  
Hongzhu Wang ◽  
Mengxun Chen ◽  
Liping Song ◽  
Youju Huang
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Drug Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Photothermal Therapy ◽  
Drug Loading ◽  
Temperature Sensitive

A key challenge for nanoparticles-based drug delivery system is to achieve manageable drug release in tumour cell. In this study, a versatile system combining photothermal therapy and controllable drug release for tumour cells using temperature-sensitive block copolymer coupled Au NRs@SiO2 is reported. While the Au NRs serve as hyperthermal agent and the mesoporous silica was used to improve the drug loading and decrease biotoxicity. The block copolymer acted as “gatekeeper” to regulate the release of model drug (Doxorubicin hydrochloride, DOX). Through in vivo and in vitro experiments, we achieved the truly controllable drug release and photothermal therapy with the collaborative effect of the three constituents of the nanocomposites. The reported nanocomposites pave the way to high-performance controllable drug release and photothermal therapy system.

scholarly journals An aptamer-targeting photoresponsive drug delivery system using “off–on” graphene oxide wrapped mesoporous silica nanoparticles

Nanoscale ◽  
2015 ◽  
Vol 7 (14) ◽  
pp. 6304-6310 ◽  
Author(s):  
Yuxia Tang ◽  
Hao Hu ◽  
Molly Gu Zhang ◽  
Jibin Song ◽  
Liming Nie ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Graphene Oxide ◽  
Cancer Therapy ◽  
Drug Release ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Drug Delivery System ◽  
Delivery System ◽  
Mesoporous Silica Nanoparticles ◽  
Targeted Cancer Therapy

A photoresponsive drug delivery system was developed for light-mediated drug release and aptamer-targeted cancer therapy.

scholarly journals pH and Redox Dual-Responsive MSN-S-S-CS as a Drug Delivery System in Cancer Therapy

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1279 ◽  
Author(s):  
Yanqin Xu ◽  
Liyue Xiao ◽  
Yating Chang ◽  
Yuan Cao ◽  
Changguo Chen ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Cancer Therapy ◽  
Drug Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Release Rate ◽  
Drug Loading ◽  
Impregnation Method ◽  
Amino Groups ◽  
Dual Responsive

In order to achieve a controlled release drug delivery system (DDS) for cancer therapy, a pH and redox dual-responsive mesoporous silica nanoparticles (MSN)-sulfur (S)-S- chitosan (CS) DDS was prepared via an amide reaction of dithiodipropionic acid with amino groups on the surface of MSN and amino groups on the surface of CS. Using salicylic acid (SA) as a model drug, SA@MSN-S-S-CS was prepared by an impregnation method. Subsequently, the stability, swelling properties and drug release properties of the DDS were studied by x-ray diffraction, scanning electron microscopy, Fourier transform infrared microspectroscopy, size and zeta potential as well as Brunauer–Emmett–Teller surface area. Pore size and volume of the composites decreased after drug loading but maintained a stable structure. The calculated drug loading rate and encapsulation efficiency were 8.17% and 55.64%, respectively. The in vitro drug release rate was 21.54% in response to glutathione, and the release rate showed a marked increase as the pH decreased. Overall, double response functions of MSN-S-S-CS had unique advantages in controlled drug delivery, and may be a new clinical application of DDS in cancer therapy.

scholarly journals DISPOSABLE CONTACT LENS-BASED OCULAR DELIVERY OF MOXIFLOXACIN : A NOVEL APPROACH

2021 ◽  
pp. 105-111
Author(s):  
UMESH KUMAR SHARMA
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Contact Lens ◽  
Drug Loading ◽  
Morphological Characteristics ◽  
Drug Release Profile ◽  
In Vitro Drug Release

Objective: In the present research, the main objective was to investigate the possibility of designing, fabricating, and optimizing a disposable ocular film-based drug delivery system. Methods: Moxifloxacin hydrochloride was loaded onto the prepared disposable ocular films by the soaking method. Results: The drug loading conditions were studied, and it was found that the maximum drug loading was achieved in 3 hours at pH 6.5 of the drug solution. It was also observed that the drug loading efficacy and in vitro drug release profile can be monitored by varying the ocular film composition. The ocular films were then characterized for thickness uniformity, size uniformity, weight uniformity, swelling index, surface pH, breaking on elongation, folding endurance, bio-adhesive strength, transparency, drug loading efficiency, moisture content, morphological characteristics, and in vitro drug release profiles. Conclusion: Based on the results, it was concluded that the developed disposable ocular films demonstrate a significant prolonged drug release within the therapeutic range of up to 12 h, which is promising as a novel disposable contact lens-based ocular drug delivery system.

Study of pH-Responsive and Polyethylene Glycol-Modified Doxorubicin-Loaded Mesoporous Silica Nanoparticles for Drug Delivery

2020 ◽  
Vol 20 (10) ◽  
pp. 5997-6006
Author(s):  
Yujie Qin ◽  
Xiaoqian Shan ◽  
Yu Han ◽  
Hang Jin ◽  
Ying Gao
Keyword(s):  
Drug Delivery ◽  
Polyethylene Glycol ◽  
Drug Release ◽  
Mesoporous Silica ◽  
Drug Delivery System ◽  
Delivery System ◽  
Phosphate Buffer ◽  
Drug Loading ◽  
Phosphate Buffer Solution ◽  
Tumor Cell Death

Tumor-targeted drug delivery systems represent challenging and widely investigated strategies to enhance cancer chemotherapy. In this study, we introduce a novel high-hydrophilic mesoporous silica nanoparticle system with a pH-sensitive drug release. The resultant composite nanoparticles appear as spheres of uniform size (450±25 nm) with a porous structure, which enables a high drug-loading ratio. Through modification of chitosan and polyethylene glycol monomethyl ether, the modified mesoporous silica was non-toxic to normal cells, but effective at inducing tumor cell death. With regard to the characteristics of drug release, the modified mesoporous silica clearly displayed a pH-stimulated release of the model drug doxorubicin hydrochloride in an acidic phosphate buffer solution (pH 4.0 and 6.0). The release was much greater than that observed in neutral or alkaline phosphate buffer solutions (pH 7.3 and 8.0). Furthermore, the release behavior was in accordance with the Higuchi model, indicating that this modified mesoporous silica drug delivery system can exhibit controlled release. The above results imply that the modified mesoporous silica is an effective drug delivery system for cancer therapy.

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