Development and in vitro safety evaluation of pramipexole-loaded hollow mesoporous silica (HMS) particles (original) (raw)
Related papers
Biotechnology & Biotechnological Equipment, 2019
In this study, spherical hollow mesoporous silica (HMS) particles with average size of 550 nm were loaded with dopamine-receptor agonist pramipexole, as a model drug. High drug loading (55%) was achieved by its incorporation in the reservoir structure of HMS. The newly developed drug-delivery systems were further double-coated with bioadhesive polymers chitosan and sodium alginate to achieve sustained release. The double chitosan/sodium alginate coating diminished the initial burst effect and lowered pramipexole release at two pH values (1.2 and 6.8) as shown by in vitro release studies. The haemolytic assay and MTT-test in human neuroblastoma SH-SY5Y cells showed good safety profile of the novel pramipexole-loaded HMS particles. Moreover, a more pronounced protection of human neuroblastoma SH-SY5Y cells against H 2 O 2-induced oxidative damage was observed upon treatment with pramipexole-loaded (noncoated or chitosan-coated) HMS particles compared to the free drug. In conclusion, we found that HMS particles might be of great interest as a promising drug-delivery system for pramipexole. The coating with biopolymer chitosan modified both the drug-delivery process and the in vitro protection against oxidative stress in neuroblastoma SH-SY5Y cells.
MESOPOROUS SILICA PARTICLES FOR DERMAL DRUG DELIVERY: A REVIEW Review Article
International Journal of Applied Pharmaceutics, 2018
Mesoporous silica particles (MSP) have been reported to be applicable in diverse situations pertaining to the delivery of several drug molecules. MSP have established themselves in treating diseases with oral, dermal and parenteral modes of administration. Recently, dermal delivery using MSP have gained a considerable amount of interest owing to the increase in drug stability, permeation and ease of functionalization. MSP, in general, have a very high capability of delivering actives ranging from small molecules like drugs and amino acids to larger peptides, vaccines and antibodies. The applicability of MSP in achieving desired cosmetic and health-related outcomes depends on the careful tuning of their pore size, surface area, shape and overall physicochemical properties. This review provides comprehensive details of the recent developments in the fabrication of MSP, their characteristic features and, applications in dermal drug delivery. Studies on establishing the safety profile of MSP have also been summarized in the review.
Characterization and Comparison of Mesoporous Silica Particles for Optimized Drug Delivery
Nanomaterials and Nanotechnology, 2014
In this study we have investigated the suitability of a number of different mesoporous silica nanoparticle structures for carrying a drug cargo. We have fully characterized the nanoparticles in terms of their physical parameters; size, surface area, internal pore size and structure. These data are all required if we are to make an informed judgement on the suitability of the structure for drug delivery in vivo. With these parameters in mind, we investigated the loading/unloading profile of a model therapeutic into the pore structure of the nanoparticles. We demonstrate that the release can be controlled by capping the pores on the nanoparticles to achieve temporal control of the unloading. We have also examined the rate and mechanism of the degradation of the nanoparticles over an extended period of time. The eventual dissolution of the nanoparticles after cargo release is a desirable property for a drug delivery system.
The biocompatibility of mesoporous silicates
Biomaterials, 2008
Micro-and nano-mesoporous silicate particles are considered potential drug delivery systems because of their ordered pore structures, large surface areas and the ease with which they can be chemically modified. However, few cytotoxicity or biocompatibility studies have been reported, especially when silicates are administered in the quantities necessary to deliver low-potency drugs. The biocompatibility of mesoporous silicates of particle sizes w150 nm, w800 nm and w4 mm and pore sizes of 3 nm, 7 nm and 16 nm, respectively, is examined here. In vitro, mesoporous silicates showed a significant degree of toxicity at high concentrations with mesothelial cells. Following subcutaneous injection of silicates in rats, the amount of residual material decreased progressively over 3 months, with good biocompatibility on histology at all time points. In contrast, intra-peritoneal and intra-venous injections in mice resulted in death or euthanasia. No toxicity was seen with subcutaneous injection of the same particles in mice. Microscopic analysis of the lung tissue of the mice indicated that death may be due to thrombosis. Although local tissue reaction to mesoporous silicates was benign, they caused severe systemic toxicity. This toxicity might be mitigated by modification of the materials.
Mesoporous Silica Particles for Dermal Drug Delivery: A Review
International Journal of Applied Pharmaceutics, 2018
Mesoporous silica particles (MSP) have been reported to be applicable in diverse situations pertaining to the delivery of several drug molecules. MSP have established themselves in treating diseases with oral, dermal and parenteral modes of administration. Recently, dermal delivery using MSP have gained a considerable amount of interest owing to the increase in drug stability, permeation and ease of functionalization. MSP, in general, have a very high capability of delivering actives ranging from small molecules like drugs and amino acids to larger peptides, vaccines and antibodies. The applicability of MSP in achieving desired cosmetic and health-related outcomes depends on the careful tuning of their pore size, surface area, shape and overall physicochemical properties. This review provides comprehensive details of the recent developments in the fabrication of MSP, their characteristic features and, applications in dermal drug delivery. Studies on establishing the safety profile o...