Nanosized mesoporous silica particles with high colloidal stability attract growing attention as drug delivery systems for targeted cancer treatment and as bioimaging devices. This Perspective describes recent breakthroughs in mesoporous silica nanoparticle design to demonstrate their high potential as multifunctional drug delivery nanocarriers. These types of nanoparticles can feature a well-defined and tunable porosity at the nanometer scale, high loading capacity, and multiple functionality for targeting and entering different types of cells. We focus on the requirements for an efficient stimuli-responsive and thus controllable release of cargo into cancer cells and discuss design principles for smart and autonomous nanocarrier systems. Mesoporous silica nanoparticles are viewed as a promising and flexible platform for numerous biomedical applications.

Multifunctional Mesoporous Silica Nanoparticles as a Universal Platform for Drug Delivery

Chemotherapy is currently one of the most effective ways to treat cancer. However, traditional chemotherapy faces several obstacles to clinical trials, such as poor solubility/stability, non-targeting capability and uncontrollable release of the drugs, greatly limiting their anticancer efficacy and causing severe side effects towards normal tissues. Supramolecular chemotherapy integrating non-covalent interactions and traditional chemotherapy is a highly promising candidate in this regard and can be appropriately used for targeted drug delivery. By taking advantage of supramolecular chemistry, some limitations impeding traditional chemotherapy for clinical applications can be solved effectively. Therefore, we present here a review summarizing the progress of supramolecular chemotherapy in cancer treatment based on host–guest recognition and provide guidance on the design of new targeting supramolecular chemotherapy combining diagnostic and therapeutic functions. Based on a large number of state-of-the-art studies, our review will advance supramolecular chemotherapy on the basis of host–guest recognition and promote translational clinical applications.

Supramolecular chemotherapy based on host–guest molecular recognition: a novel strategy in the battle against cancer with a bright future

Quaternary ammonium-based biomedical materials: State-of-the-art, toxicological aspects and antimicrobial resistance.

In this study, we introduced a targeting polymer poly(ethylene glycol)–folic acid (PEG–FA) on the surface of polydopamine (PDA)-modified mesoporous silica nanoparticles (MSNs) to develop the novel nanoparticles (NPs) MSNs@PDA–PEG–FA, which were employed as a drug delivery system loaded with doxorubicin (DOX) as a model drug for cervical cancer therapy. The chemical structure and properties of these NPs were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption/desorption, dynamic light scattering-autosizer, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The pH-sensitive PDA coating served as a gatekeeper. The in vitro drug release experiments showed pH-dependent and sustained drug release profiles that could enhance the therapeutic anticancer effect and minimize potential damage to normal cells due to the acidic microenvironment of the tumor. These MSNs@PDA–PEG–FA achieved significantly high targeting efficiency, which was demonstrated...

pH-Sensitive Delivery Vehicle Based on Folic Acid-Conjugated Polydopamine-Modified Mesoporous Silica Nanoparticles for Targeted Cancer Therapy

Precise nanomedicine has been extensively explored for efficient cancer imaging and targeted cancer therapy, as evidenced by a few breakthroughs in their preclinical and clinical explorations. Here, we demonstrate the recent advances of intelligent cancer nanomedicine, and discuss the comprehensive understanding of their structure-function relationship for smart and efficient cancer nanomedicine including various imaging and therapeutic applications, as well as nanotoxicity. In particular, a few emerging strategies that have advanced cancer nanomedicine are also highlighted as the emerging focus such as tumor imprisonment, supramolecular chemotherapy, and DNA nanorobot. The challenge and outlook of some scientific and engineering issues are also discussed in future development. We wish to highlight these new progress of precise nanomedicine with the ultimate goal to inspire more successful explorations of intelligent nanoparticles for future clinical translations.

Precise nanomedicine for intelligent therapy of cancer

Polymer assembly: Promising carriers as co-delivery systems for cancer therapy

Formation of drug/surfactant catanionic vesicles and their application in sustained drug release.

Toxicity and low entrapment efficiency are the main problems for pharmaceutical applications of catanionic vesicles. In order to minimize surfactant toxicity, increase the drug loading content and simultaneously reduce the need for tedious chemical synthesis, we use oleic acid as the biocompatible surfactant, which reacts with the selected drug molecules (amlodipine) to produce an amphiphilic prodrug molecule for the straightforward fabrication of catanionic vesicles. The prodrug molecules are easily obtained by proton transfer between amlodipine and oleic acid molecules. The characterization of prodrug molecules and their aggregation behaviours in aqueous solutions are investigated by using Fourier transform infrared spectrophotometry (FTIR), 1H-nuclear magnetic resonance (1H-NMR), differential scanning calorimetry (DSC), surface tension measurement, transmission electron microscopy (TEM), dynamic light scattering (DLS), conductivity and zeta potential (ζ). The results demonstrate that vesicles could be easily formed with the prodrug amphiphilic molecules dispersed in aqueous solutions. Particularly, the drug release behaviour of the as-prepared catanionic vesicles exhibits excellent sustained drug release properties, which demonstrates their promising application in the newly designed drug delivery system.

Catanionic vesicles from an amphiphilic prodrug molecule: a new concept for drug delivery systems

WITHDRAWN: Polymer assembly: Promising carriers as co-delivery systems for cancer therapy

A review of polypeptide-based polymersomes.

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