In cancer treatment, the safe delivery of the drug to the target tissue is an important task. 5-fluorouracil (5-FU), the well-known anticancer drug, was encapsulated into the pores of unmodified mesoporous silica SBA-15, as well as silica modified with 3-aminopropyl and cyclohexyl groups. The drug release studies were performed in two different media, in a simulated gastric fluid (pH = 2) and in a simulated body fluid (pH = 7) by RP-UHPLC. The simple and rapid RP-UHPLC method for quantitative determination of 5-fluorouracil released from unmodified and modified mesoporous silica SBA-15 was established on ODS Hypersil C18 column (150 × 4.6 mm, 5 µm) eluted with mobile phase consisted of methanol: phosphate buffer in volume ratio of 3:97 (/). Separation was achieved by isocratic elution. The flow rate was kept at 1 mL/min, the injection volume was set at 20 µL and the column oven temperature was maintained at 25 °C. The effluent was monitored at 268 nm. This paper provides information about the quantitative determination of the released 5-FU from silica. It was found out that larger amount of the drug was released in neutral pH in comparison with the acidic medium. In addition, surface functionalisation of silica SBA-15 influences the release properties of the drug.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479690 | PMC |
| http://dx.doi.org/10.3390/molecules24071317 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rapid identification of pathogenic bacteria from clinical positive blood cultures virus-like magnetic bead enrichment and MALDI-TOF MS profiling.
Analyst
January 2025
Institutes of Biomedical Sciences & Shanghai Stomatological Hospital, Department of Chemistry, Fudan University, Shanghai 200433, China.
Reducing the time required for the detection of bacteria in blood samples is a critical area of investigation in the field of clinical diagnosis. Positive blood culture samples often require a plate culture stage due to the interference of blood cells and proteins, which can result in significant delays before the isolation of single colonies suitable for matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis. In this study, we developed a non-specific enrichment strategy based on SiO-encapsulated FeO nanoparticles combined with MALDI-TOF MS for direct identification of bacteria from aqueous environments or positive blood culture samples.
View Article and Find Full Text PDFMesoporous Silica Nanoparticle Rigid Anchor Attached Pt Complex for Catalytic H/D Exchange of Aromatic Substrates.
Inorg Chem
January 2025
Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States.
A Pt(II) aqua complex supported by mesoporous silica nanoparticle (MSN)-immobilized sulfonated CNN pincer ligand featuring a rigid SiO tether was prepared. This hybrid material was tested as a catalyst in H/D exchange reactions of C(sp)-H bonds of selected aromatic substrates and DO-2,2,2-trifluoroethanol- (TFE-) mixtures or CDCOD acting as a source of exchangeable deuterium. The catalyst immobilization served as a means to not only enable the catalyst's recyclability but also minimize the coordination of sulfonate groups and the metal centers originating from different catalyst's moieties that would preserve reactive Pt(OH) fragments needed for catalytic C-H bond activation.
View Article and Find Full Text PDFMicrofluidics-enabled core/shell nanostructure assembly: Understanding encapsulation processes via particle characterization and molecular dynamics.
Adv Colloid Interface Sci
January 2025
Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Biocity (3rd fl.), Tykistökatu 6A, 20520 Turku, Finland; Turku Bioscience Centre, University of Turku and Åbo Akademi University, Biocity (5th fl.), Tykistökatu 6A, 20520 Turku, Finland. Electronic address:
In the realm of hybrid nanomaterials, the construction of core/shell nanoparticles offer an effective strategy for encompassing a particle by a polymeric or other suitable material, leading to a nanocomposite with distinct features within its structure. The polymer shell can be formed via nanoprecipitation, optimized by manipulating fluid flow, fluid mixing, modulating device features in microfluidics. In addition to the process optimization, success of polymer assembly in encapsulation strongly lies upon the favorable molecular interactions originating from the diverse chemical environment shared between core and shell materials facilitating formation of core/shell nanostructure.
View Article and Find Full Text PDFBactericidal Hemostatic Sponge: A Point of Care Solution to Combat Traumatic Injury.
Adv Healthc Mater
January 2025
Antimicrobial Research Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru, Karnataka, 560064, India.
Uncontrollable haemorrhage and associated microbial contamination in the battlefield and civilian injuries pose a tremendous threat to healthcare professionals. Such traumatic wounds often necessitate an effective point-of-care solution to prevent the consequent morbidity owing to blood loss or haemorrhage. However, developing superior hemostatic materials with anti-infective properties remains a challenge.
View Article and Find Full Text PDFThe impact of glidants on the rheological properties of active pharmaceutical ingredients: A study of conventional and alternative flow enhancers.
Int J Pharm
January 2025
Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium.
Nowadays, most of the newly developed active pharmaceutical ingredients (APIs) consist of cohesive particles with a mean particle size of <100μm, a wide particle size distribution (PSD) and a tendency to agglomerate, therefore they are difficult to handle in continuous manufacturing (CM) lines. The current paper focuses on the impact of various glidants on the bulk properties of difficult-to-handle APIs. Three challenging powders were included: two extremely cohesive APIs (acetaminophen micronized (APAPμ) and metoprolol tartrate (MPT)) which previously have shown processing issues during different stages of the continuous direct compression (CDC)-line and a spray dried placebo (SD) powder containing hydroxypropylmethyl cellulose (HPMC), known for its sub-optimal flow with a high specific surface area (SSA) and low density.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!