Aptamer-based self-assembled supramolecular vesicles for pH-responsive targeted drug delivery

2016 ◽  
Vol 60 (5) ◽  
pp. 628-634 ◽  
Author(s):  
Shuxian Wu ◽  
Juan Li ◽  
Hong Liang ◽  
Liping Wang ◽  
Xian Chen ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Ph Responsive ◽  
Targeted Drug ◽  
Self Assembled

scholarly journals Folic Acid-Terminated Poly(2-Diethyl Amino Ethyl Methacrylate) Brush-Gated Magnetic Mesoporous Nanoparticles as a Smart Drug Delivery System

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 59
Author(s):  
Abeer M. Beagan ◽  
Ahlam A. Alghamdi ◽  
Shatha S. Lahmadi ◽  
Majed A. Halwani ◽  
Mohammed S. Almeataq ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Resistance ◽  
Folic Acid ◽  
Drug Delivery System ◽  
Targeted Drug Delivery ◽  
Ph Responsive ◽  
Ethyl Methacrylate ◽  
Mesoporous Nanoparticles ◽  
Targeted Drug ◽  
Mcf 7

Currently, chemotherapy is an important method for the treatment of various cancers. Nevertheless, it has many limitations, such as poor tumour selectivity and multi-drug resistance. It is necessary to improve this treatment method by incorporating a targeted drug delivery system aimed to reduce side effects and drug resistance. The present work aims to develop pH-sensitive nanocarriers containing magnetic mesoporous silica nanoparticles (MMSNs) coated with pH-responsive polymers for tumour-targeted drug delivery via the folate receptor. 2-Diethyl amino ethyl methacrylate (DEAEMA) was successfully grafted on MMSNs via surface initiated ARGET atom transfer radical polymerization (ATRP), with an average particle size of 180 nm. The end groups of poly (2-(diethylamino)ethyl methacrylate) (PDEAEMA) brushes were converted to amines, followed by a covalent bond with folic acid (FA) as a targeting agent. FA conjugated to the nanoparticle surface was confirmed by X-ray photoelectron spectroscopy (XPS). pH-Responsive behavior of PDEAEMA brushes was investigated by Dynamic Light Scattering (DLS). The nanoparticles average diameters ranged from ca. 350 nm in basic media to ca. 650 in acidic solution. Multifunctional pH-sensitive magnetic mesoporous nanoparticles were loaded with an anti-cancer drug (Doxorubicin) to investigate their capacity and long-circulation time. In a cumulative release pattern, doxorubicin (DOX) release from nano-systems was ca. 20% when the particle exposed to acidic media, compared to ca. 5% in basic media. The nano-systems have excellent biocompatibility and are minimally toxic when exposed to MCF-7, and -MCF-7 ADR cells.

Programmable shape-morphing microrobots for localized cancer cells treatment

2021 ◽  
Author(s):  
Chen Xin ◽  
Dongdong Jin ◽  
Yanlei Hu ◽  
Liang Yang ◽  
Rui Li ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Targeted Drug Delivery ◽  
Biological Applications ◽  
Proof Of Concept ◽  
Ph Responsive ◽  
Solution Ph ◽  
Shape Morphing ◽  
On Demand ◽  
Targeted Drug

Abstract Microrobots have attracted great attentions due to their wide applications in microobjects manipulation and targeted drug delivery. To realize more complex micro/nano cargos manipulation (e.g., encapsulation and release) in biological applications, endowing microrobots with shapes adaptability with the environment is highly desirable. Here, designable shape-morphing microrobots (SMMRs) have been developed by programmatically encoding different expansion rate in a pH-responsive hydrogel. Combined with magnetic propelling, the shape-morphing microcrab (SMMC) is capable of performing targeted microparticle delivery, including gripping, transporting, and releasing through claws morphing. As a proof-of-concept demonstration, the shape-morphing microfish (SMMF) is designed to encapsulate drug (doxorubicin (DOX)) by closing mouth in phosphate buffer saline (PBS, pH~7.4) and release them by opening mouth in slightly acid solution (pH<7), which realize localized Hela cells treatment in an artificial vascular network. These SMMRs with powerful shape morphing capabilities and remote motion controllability provide new platforms for complex microcargos operation and on-demand drug release.

Supramolecular nanoparticle carriers self-assembled from cyclodextrin- and adamantane-functionalized polyacrylates for tumor-targeted drug delivery

2014 ◽  
Vol 2 (13) ◽  
pp. 1879 ◽  
Author(s):  
Chung Yen Ang ◽  
Si Yu Tan ◽  
Xiaoling Wang ◽  
Quan Zhang ◽  
Majad Khan ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Targeted Drug ◽  
Self Assembled

scholarly journals pH-Responsive Poly(Ethylene Glycol)-block-Polylactide Micelles for Tumor-Targeted Drug Delivery

2017 ◽  
Vol 18 (9) ◽  
pp. 2711-2722 ◽  
Author(s):  
Lin Xiao ◽  
Lixia Huang ◽  
Firmin Moingeon ◽  
Mario Gauthier ◽  
Guang Yang
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Targeted Drug Delivery ◽  
Ph Responsive ◽  
Poly Ethylene Glycol ◽  
Targeted Drug ◽  
Poly Ethylene

Magnetic actuated pH-responsive hydrogel-based soft micro-robot for targeted drug delivery

2016 ◽  
Vol 25 (2) ◽  
pp. 027001 ◽  
Author(s):  
Hao Li ◽  
Gwangjun Go ◽  
Seong Yong Ko ◽  
Jong-Oh Park ◽  
Sukho Park
Keyword(s):  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Ph Responsive ◽  
Micro Robot ◽  
Targeted Drug

Design and synthesis of aptamer AS1411-conjugated EG@TiO2@Fe2O3 nanoparticles as a drug delivery platform for tumor-targeted therapy

2020 ◽  
Vol 44 (37) ◽  
pp. 15871-15886 ◽  
Author(s):  
Nahid Mansouri ◽  
Razieh Jalal ◽  
Batool Akhlaghinia ◽  
Khalil Abnous ◽  
Roya Jahanshahi
Keyword(s):  
Drug Delivery ◽  
Targeted Therapy ◽  
Sustained Release ◽  
Targeted Drug Delivery ◽  
Fe2o3 Nanoparticles ◽  
Ph Responsive ◽  
Release System ◽  
Design And Synthesis ◽  
Delivery Platform ◽  
Targeted Drug

AS1411@GMBS@EG@TiO2@Fe2O3 nanoparticle is an effective and safe pH-responsive sustained release system for targeted drug delivery into nucleolin-positive cells.

Recent Advances in Asialoglycoprotein Receptor and Glycyrrhetinic Acid Receptor-Mediated and/or pH Responsive Hepatocellular Carcinoma-Targeted Drug Delivery

2020 ◽  
Vol 27 ◽  
Author(s):  
Yu-Lan Li ◽  
Xiao-Min Zhu ◽  
Hong Liang ◽  
Chris Orvig ◽  
Zhen-Feng Chen
Keyword(s):  
Hepatocellular Carcinoma ◽  
Drug Delivery ◽  
Targeted Drug Delivery ◽  
Asialoglycoprotein Receptor ◽  
Glycyrrhetinic Acid ◽  
Ph Responsive ◽  
Acid Receptor ◽  
Targeted Drug ◽  
Poly Ethylene ◽  
Acid Labile

Background: Hepatocellular carcinoma (HCC) seriously affects human health, especially, it easily develop multi-drug resistance (MDR) result in treatment failure. There is an urgent need to develop highly effective and low-toxicity therapeutic agents to treat HCC and overcome its MDR. Targeted drug delivery systems (DDS) for cancer therapy, including nanoparticles, lipids, micelles and liposomes, have been studied for decades. Recently, more and more attentions have been paid to multifunctional DDS containing various ligands such as polymer moieties, targeting moieties, and acid-labile linkages. The polymer moieties such as poly(ethylene glycol) (PEG), chitosan, hyaluronic acid, pullulan, poly(ethylene oxide) (PEO), poly(propylene oxide) (PPO) protect DDS from degradation. Asialoglycoprotein receptor (ASGPR) and glycyrrhetinic acid receptor (GAR) are the most often used as the targeting moieties, which are overexpressed on hepatocytes. Acid-labile linkage, catering for the pH difference between tumor cells and normal tissue, has been utilized to release drugs at tumor tissue. Objectives: This review provides a summary on the recent progresses in ASGPR and GAR-mediated and/or pH responsive HCC-targeted drug delivery. Conclusion: The multifunctional DDS may prolong systemic circulation, continuously release drugs, increase drugs tumor accumulation at targeted site,enhance anticancer effect, and reduce side effects both in vitro or vivo. But it is rarely used to investigate MDR of HCC, it is need to further study before in clinical.

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