99mTc-conjugated manganese-based mesoporous silica nanoparticles for SPECT, pH-responsive MRI and anti-cancer drug delivery

Nanoscale ◽  
2016 ◽  
Vol 8 (47) ◽  
pp. 19573-19580 ◽  
Author(s):  
Hongbo Gao ◽  
Xiaohang Liu ◽  
Wei Tang ◽  
Dechao Niu ◽  
Bingni Zhou ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Cancer Drug ◽  
Ph Responsive ◽  
Anti Cancer ◽  
Cancer Drug Delivery

Ultra-small mesoporous silica nanoparticles as efficient carriers for pH responsive releases of anti-cancer drugs

2015 ◽  
Vol 44 (46) ◽  
pp. 20186-20192 ◽  
Author(s):  
Haoquan Zheng ◽  
Cheuk-Wai Tai ◽  
Jie Su ◽  
Xiaodong Zou ◽  
Feifei Gao
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Drug Delivery System ◽  
Electrostatic Interactions ◽  
Mesoporous Silica Nanoparticles ◽  
Ph Responsive ◽  
Drug Molecule ◽  
Drug Molecules ◽  
Anti Cancer

A pH-responsive drug delivery system via mesoporous silica nanoparticles as carriers can be achieved based on electrostatic interactions between drug molecules and carriers, when the isoelectric point of the drug molecule is high.

scholarly journals Poly(oligo(ethylene glycol) methyl ether methacrylate) Capped pH-Responsive Poly(2-(diethylamino)ethyl methacrylate) Brushes Grafted on Mesoporous Silica Nanoparticles as Nanocarrier

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 823
Author(s):  
Khalid M. Alotaibi ◽  
Abdurrahman A. Almethen ◽  
Abeer M. Beagan ◽  
Latifah H. Alfhaid ◽  
Maqusood Ahamed ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Ethylene Glycol ◽  
Silica Nanoparticles ◽  
Methyl Ether ◽  
Mesoporous Silica Nanoparticles ◽  
Cancer Drug ◽  
Ph Responsive ◽  
Ethyl Methacrylate ◽  
Anti Cancer ◽  
Glycol Methyl Ether

In this paper, a new pH-responsive nanosystem based on mesoporous silica nanoparticles (MSNs) was developed for cancer therapy. Poly(2-(diethylamino) ethyl methacrylate) (PDEAEMA) was grafted on their outer surface and acts as a gatekeeper, followed by subsequent modification of the polymer by cysteine (MSN-PDEAEMA-Cys) and poly(oligo(ethylene glycol) methyl ether methacrylate) (MSN-PDEAEMA-Cys-POEGMEMA). The physicochemical properties of these nanocarriers were characterized using scanning and transmission electron microscopies (SEM and TEM), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and dynamic light scattering (DLS). The synthesized nanoparticles were well-dispersed with a diameter of ca. 200 nm. The obtained XPS results confirm the successful modification of MSN-PDEAEMA with Cys and POEGMEMA by increasing the peak intensity of C–O and C=O groups at 286.5 and 288.5 eV, respectively. An anti-cancer drug, doxorubicin (DOX), was encapsulated into the fabricated nanoplatform. The DOX release amount at physiological pH of 7.4 was limited (10%), while an accumulation drug release of ca. 35% was accomplished after 30 h in acidic media. The MTT cell line was used to assess the cytotoxicity of the unloaded and DOX-loaded fabricated nanoplatforms. Upon loading of DOX on these nanomaterials, they showed significant toxicity to human liver cancer cells. These results suggest that the prepared nano-structured materials showed good biocompatibility as well, and they can serve as nanocarriers for the delivery of anti-cancer drugs.

scholarly journals Synthesis of surface capped mesoporous silica nanoparticles for pH-stimuli responsive drug delivery applications

MedChemComm ◽  
2017 ◽  
Vol 8 (9) ◽  
pp. 1797-1805 ◽  
Author(s):  
Madhappan Santha Moorthy ◽  
Subramanian Bharathiraja ◽  
Panchanathan Manivasagan ◽  
Kang Dae Lee ◽  
Junghwan Oh
Keyword(s):  
Drug Delivery ◽  
Cancer Therapy ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Drug Carrier ◽  
Stimuli Responsive ◽  
Ph Responsive ◽  
Drug Delivery Applications

Herein, we propose a “host–guest” complexation-based mesoporous silica drug carrier, MSNs@Mela@TTM, for pH-responsive drug delivery applications in cancer therapy.

scholarly journals Esterase- and pH-responsive poly(β-amino ester)-capped mesoporous silica nanoparticles for drug delivery

Nanoscale ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 7178-7183 ◽  
Author(s):  
Isurika R. Fernando ◽  
Daniel P. Ferris ◽  
Marco Frasconi ◽  
Dmitry Malin ◽  
Elena Strekalova ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Amino Ester ◽  
Stimuli Responsive ◽  
Ph Responsive

Gating of mesoporous silica nanoparticles (MSNs) with the stimuli-responsive poly(β-amino ester) has been achieved.

scholarly journals Improving anti-cancer drug delivery performance of magnetic mesoporous silica nanocarriers for more efficient colorectal cancer therapy

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Sonia Iranpour ◽  
Ahmad Reza Bahrami ◽  
Sirous Nekooei ◽  
Amir Sh. Saljooghi ◽  
Maryam M. Matin
Keyword(s):  
Colorectal Cancer ◽  
Drug Delivery ◽  
Side Effects ◽  
Mesoporous Silica ◽  
Cancer Drug ◽  
Delivery Performance ◽  
Anti Cancer ◽  
Cancer Drug Delivery ◽  
Magnetic Mesoporous Silica ◽  
Ht 29

Abstract Background Improving anti-cancer drug delivery performance can be achieved through designing smart and targeted drug delivery systems (DDSs). For this aim, it is important to evaluate overexpressed biomarkers in the tumor microenvironment (TME) for optimizing DDSs. Materials and methods Herein, we designed a novel DDS based on magnetic mesoporous silica core–shell nanoparticles (SPION@MSNs) in which release of doxorubicin (DOX) at the physiologic pH was blocked with gold gatekeepers. In this platform, we conjugated heterofunctional polyethylene glycol (PEG) onto the outer surface of nanocarriers to increase their biocompatibility. At the final stage, an epithelial cell adhesion molecule (EpCAM) aptamer as an active targeting moiety was covalently attached (Apt-PEG-Au@NPs-DOX) for selective drug delivery to colorectal cancer (CRC) cells. The physicochemical properties of non-targeted and targeted nanocarriers were fully characterized. The anti-cancer activity, cellular internalization, and then the cell death mechanism of prepared nanocarriers were determined and compared in vitro. Finally, tumor inhibitory effects, biodistribution and possible side effects of the nanocarriers were evaluated in immunocompromised C57BL/6 mice bearing human HT-29 tumors. Results Nanocarriers were successfully synthesized with a mean final size diameter of 58.22 ± 8.54 nm. Higher cytotoxicity and cellular uptake of targeted nanocarriers were shown in the EpCAM-positive HT-29 cells as compared to the EpCAM-negative CHO cells, indicating the efficacy of aptamer as a targeting agent. In vivo results in a humanized mouse model showed that targeted nanocarriers could effectively increase DOX accumulation in the tumor site, inhibit tumor growth, and reduce the adverse side effects. Conclusion These results suggest that corporation of a magnetic core, gold gatekeeper, PEG and aptamer can strongly improve drug delivery performance and provide a theranostic DDS for efficient CRC therapy. Graphic abstract

Tannin as a gatekeeper of pH-responsive mesoporous silica nanoparticles for drug delivery

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85436-85441 ◽  
Author(s):  
Chunlin Hu ◽  
Lingxue Yu ◽  
Zhen Zheng ◽  
Jing Wang ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Amino Group ◽  
Ph Responsive ◽  
Amidation Reaction

Tannin grafted on mesoporous silica nanoparticles (tannin-MSNs) was synthesized by the amidation reaction of carboxyl benzyl borate with amino group modified MSN.

Sign in / Sign up

Export Citation Format

Share Document