Showing 3 results for Targeted Drug Delivery
Volume 5, Issue 1 (7-2021)
Abstract
Abstract
Research Subject: Breast cancer is one of the most common cancer in the world with the highest mortality rate in women. Chemotherapy is the typical therapy for the cancer. However, it has side effects due to damage to healthy cells. Targeted drug delivery by nano carriers to the cancerous cells reduces the toxic side effects on normal cells. Serum albumin is a widely used drug carrier because of its availability, ease of preparation, and binding ability to various ligands. Attachment of iron oxide nanoparticles to albumin can control their distribution by applying an external magnetic field.
Research Approach: In this study, albumin nanoparticles attached to superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized and loaded with 5-Fluorouracil (5-FU) anticancer drug by using the desolvation technique. The produced nanoparticles were characterized in terms of size, surface charge, and drug entrapment, by dynamic light scattering (DLS) and UV-Vis spectrophotometry. The cytotoxic effects of 5FU-loaded magnetic albumin nanoparticles and free 5FU on MCF7 cells were evaluated with the MTT assay. The internalization of nanoparticles in MCF-7 cells was confirmed by Prussian blue staining. In the end, the effects of nanoparticles on cell cycle and apoptosis were evaluated by flow cytometry using propidium iodide.
Main Results: The mean particle size and zeta potential of 5FU loaded albumin nanoparticles and albumin magnetic nanoparticles were 220 nm, -25.8 mV, and 221 nm, -28 mV respectively. Drug entrapment efficiency and drug loading efficiency were also, 20%, 1%, and 15.8%, and 0.06% for albumin nanoparticles and magnetic albumin nanoparticles in turn. The drug-loaded magnetic albumin nanoparticles showed higher cytotoxicity than the free drug on MCF-7 cells. The flow cytometry cell cycle analysis showed more cytotoxicity of albumin nanoparticles in comparison with other groups. According to these results, it can be said that 5-FU loaded magnetic albumin nanoparticles were more effective and deserve further studies in the cancer treatment.
Keywords: Albumin magnetic nanoparticles, 5-fluorouracil, targeted drug delivery, MCF-7 cell line
S.m.r. Aghamiri , S. Akbari-Karadeh , P. Tajer Mohammad Ghazvini , S. Ghorbanzadeh Mashkani ,
Volume 9, Issue 2 (9-2018)
Abstract
Aims: In recent years, magnetotactic bacteria and their magnetic nanoparticles (magnetosomes) were considered in different fields of science, including medicine, biotechnology, and nanobiotechnology due to their novel and unique magnetic properties. The present study was performed with the aim of evaluating the effect of temperature and reducing agent on labeling of magnetosomes with 188Re and biodistribution of labeled magnetic nanoparticles.
Materials and Methods: In this experimental study, Alphaproteobacterium MTB-KTN90 and sonication extraction method were used for the extraction of magnetic nanoparticles. After bacterial lysis, the magnetic nanoparticles produced by electron microscope were investigated and tin (II) chloride, as reducing agent, was used to check the labeling efficiency and rats were used to examine the biodistribution of the labeled magnetosomes.
Findings: The highest efficiency in magnetosome labeling experiments was 11100kBq in the initial activity, which decreased with increasing activity. The increase in temperature did not have much effect on increasing the labeling efficiency. The labeling value in the absence of a reducing agent was 721.5kBq, while at a concentration of 2mg of this agent, the labeling value increased to 10745.91kBq. After the injection of magnetosomes through the sublingual vein of the rat, the magnetosomes accumulated in the liver.
Conclusion: Magnetosomes extracted from Alphaproteobacterium MTB-KTN90 have a high potential for labeling by 188Re. Increasing temperature does not affect the labeling efficiency, but tin (II) chloride is a very important factor in optimizing the labeling efficiency, and the highest accumulation of magnetosomes labeled with 188Re after injection is in the liver of the rat.
Maryam Vesal, Zahra Vaezi, عبداله الهوردی, Hossein Naderi-Manesh,
Volume 15, Issue 4 (10-2024)
Abstract
In recent years, targeted drug delivery systems have emerged as a promising approach to increase the efficacy and minimize side effects of therapeutic agents. Cerasomes are a special type of liposomes with covalent siloxane networks on the surface that provide exceptional morphological stability while retaining all the beneficial properties of liposomes. Cerosomes provide a unique platform for drug encapsulation and delivery due to their biocompatibility, stability, controllable release, and long-term storage. In this research, an attempt has been made to engineer the surface of cerosomes to increase the selectivity and efficiency of drug delivery. In such a way that the Herceptin antibody is placed on the surface of the serosa and allows the precise targeting of HER2+ cells. Then, the physicochemical characteristics of antibody-functionalized cerosomes, including size and surface charge 229±15.6 nm and 13.5±1.2 mV were respectively obtained. The results of IR and fluorescence spectrum showed that the antibody was successfully attached to the surface of cerasome with a binding efficiency of 64%. These results prove the basic mechanisms governing the synthesis of immunocerasomes and provide a valuable approach for future developments in targeted drug delivery systems.
