Drug delivery systems are the topmost priority to increase drug safety and efficacy. In this study, hybrid porous silicates SBA-15 and its derivatives SBA@N and SBA@3N were synthesized and loaded with an anticancer drug, 5-fluorouracil. The drug release was studied in a simulated physiological environment. These materials were characterized for their textural and physio-chemical properties by scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), small-angle X-ray diffraction (SAX), and nitrogen adsorption/desorption techniques. The surface electrostatics of the materials was measured by zeta potential. The drug loading efficiency of the prepared hybrid materials was about 10%. drug release profiles were obtained in simulated fluids. Slow drug release kinetics was observed for SBA@3N, which released 7.5% of the entrapped drug in simulated intestinal fluid (SIF, pH 7.2) and 33% in simulated body fluid (SBF, pH 7.2) for 72 h. The material SBA@N presented an initial burst release of 13% in simulated intestinal fluid and 32.6% in simulated gastric fluid (SGF, pH 1.2), while about 70% of the drug was released within the next 72 h. Density functional theory (DFT) calculations have also supported the slow drug release from the SBA@3N material. The release mechanism of the drug from the prepared carriers was studied by first-order, second-order, Korsmeyer-Peppas, Hixson-Crowell, and Higuchi kinetic models. The drug release from these carriers follows Fickian diffusion and zero-order kinetics in SGF and SBF, whereas first-order, non-Fickian diffusion, and case-II transport were observed in SIF. Based on these findings, the proposed synthesized hybrid materials may be suggested as a potential drug delivery system for anti-cancer drugs such as 5-fluorouracil.
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http://dx.doi.org/10.3389/fphar.2023.1146562 | DOI Listing |
Nanoscale Adv
December 2024
Department of "Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche" (STEBICEF), University of Palermo Via Archirafi 32 90123 Palermo Italy nicolo.mauroatunipa.it.
Carbon dot (CD)-based theranostics offers a promising approach for breast cancer (BC) treatment, integrating ultra-localized chemo-photothermal effects to address chemoresistance and enhance therapeutic control. Herein, the development of a targeted theranostic nanosystem for the chemo-phototherapy of breast cancer is described. Fluorescent and biocompatible CDs were passivated with 1,2-bis(3-aminopropylamino)ethane (bAPAE) and decorated with the targeting agent folic acid (FA) through conjugation with a PEG spacer.
View Article and Find Full Text PDFHypomelanosis of Ito (HI), a neurocutaneous syndrome, is characterized by skin depigmentation and skeletal, muscular, central nervous system, cardiac, and renal manifestations. A wide variety of cutaneous manifestations besides depigmentation have been reported. Herein we describe a 23-year-old woman with HI whose extracutaneous symptoms included severe mental and motor impairment, convulsions, and deformity of the orofacial region.
View Article and Find Full Text PDFCancer Med
December 2024
Department of Hematology, Peking University First Hospital, Beijing, People's Republic of China.
Background: An effective urine-based method for the diagnosis, differential diagnosis and prognosis of multiple myeloma (MM) has not yet been developed. Urine cell-free DNA (cfDNA) carrying cancer-specific genetic and epigenetic aberrations may enable a noninvasive "liquid biopsy" for diagnosis and monitoring of cancer.
Methods: We first identified MM-specific hydroxymethylcytosine signatures by comparing 64 MM patients, 23 amyloidosis (AM) patients and 59 healthy cohort.
Chem Commun (Camb)
December 2024
School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China.
An anti-PD-L1 mediated nanodrug delivery system is developed by modifying the MOF surface and using Tpy-Gd-Tpy coordination chemistry, enabling the simultaneous delivery of chemotherapy and immunotherapy drugs. The platform enables regulated drug release and integrates multiple imaging modalities, promoting targeted delivery and facilitating tumor diagnosis through FL and MR imaging.
View Article and Find Full Text PDFJ Mater Chem B
December 2024
School of Biomedical Engineering, IIT (BHU), Varanasi, 221005, UP, India.
Wound healing can often be delayed due to non-favourable physiological conditions. Current treatment strategies have many limitations, and the development of novel therapeutic patches is urgently required. Herein, we have developed a hydrogel-based wound healing patch containing quercetin nanocrystals to enhance quercetin solubility, leading to sustained release and improved bioactivity.
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