5 results

Advances in the use of nanocarriers for cancer diagnosis and treatment

Débora Braga Vieira, Lionel Fernel Gamarra

DOI: 10.1590/S1679-45082016RB3475

ABSTRACTThe use of nanocarriers as drug delivery systems for therapeutic or imaging agents can improve the pharmacological properties of commonly used compounds in cancer diagnosis and treatment. Advances in the surface engineering of nanoparticles to accommodate targeting ligands turned nanocarriers attractive candidates for future work involving targeted drug delivery. Although not targeted, several nanocarriers have been approved for clinical use and they are currently used to treat and/or diagnosis various types of cancers. Furthermore, there are several formulations, which are […]

In vivo magnetic resonance imaging tracking of C6 glioma cells labeled with superparamagnetic iron oxide nanoparticles

Javier Bustamante Mamani, Jackeline Moraes Malheiros, Ellison Fernando Cardoso, Alberto Tannús, Paulo Henrique Silveira, Lionel Fernel Gamarra

DOI: 10.1590/S1679-45082012000200009

Objective:The aim of the current study was to monitor the migration of superparamagnetic iron oxide nanoparticle (SPION)-labeled C6 cells, which were used to induce glioblastoma tumor growth in an animal model, over time using magnetic resonance imaging (MRI), with the goal of aiding in tumor prognosis and therapy.METHODS:Two groups of male Wistar rats were used for the tumor induction model. In the first group (n=3), the tumors were induced via the injection of SPION-labeled C6 cells. In the second group […]

Study of internalization and viability of multimodal nanoparticles for labeling of human umbilical cord mesenchymal stem cells

Liza Aya Mabuchi Miyaki, Tatiana Tais Sibov, Lorena Favaro Pavon, Javier Bustamante Mamani, Lionel Fernel Gamarra

DOI: 10.1590/S1679-45082012000200012

Objective:To analyze multimodal magnetic nanoparticles-Rhodamine B in culture media for cell labeling, and to establish a study of multimodal magnetic nanoparticles-Rhodamine B detection at labeled cells evaluating they viability at concentrations of 10µg Fe/mL and 100µg Fe/mL.METHODS:We performed the analysis of stability of multimodal magnetic nanoparticles-Rhodamine B in different culture media; the mesenchymal stem cells labeling with multimodal magnetic nanoparticles-Rhodamine B; the intracellular detection of multimodal magnetic nanoparticles-Rhodamine B in mesenchymal stem cells, and assessment of the viability of labeled […]

Intracellular labeling and quantification process by magnetic resonance imaging using iron oxide magnetic nanoparticles in rat C6 glioma cell line

Javier Bustamante Mamani, Lorena Favaro Pavon, Liza Aya Mabuchi Miyaki, Tatiana Tais Sibov, Fabiana Rossan, Paulo Henrique Silveira, [...]

DOI: 10.1590/S1679-45082012000200016

Objective:To assess intracellular labeling and quantification by magnetic resonance imaging using iron oxide magnetic nanoparticles coated with biocompatible materials in rat C6 glioma cells in vitro. These methods will provide direction for future trials of tumor induction in vivo as well as possible magnetic hyperthermia applications.METHODS:Aminosilane, dextran, polyvinyl alcohol, and starch-coated magnetic nanoparticles were used in the qualitative assessment of C6 cell labeling via light microscopy. The influence of the transfection agent poly-L-lysine on cellular uptake was examined. The quantification […]

Magnetohyperthermia for treatment of gliomas: experimental and clinical studies

André César da Silva, Tiago Ribeiro Oliveira, Javier Bustamante Mamani, Suzana Mária Fleury Malheiros, Lorena Favaro Pavon, Tatiana Taís Sibov, [...]

DOI: 10.1590/s1679-45082010rw1757

ABSTRACTGliomas comprise a group of heterogeneous primary tumors of the central nervous system that originate from glial cells. Malignant gliomas account for the majority of primary malignant CNS tumors and are associated with high morbidity and mortality. Glioblastoma is the most frequent malignant glioma, and despite recent advances in diagnosis and new treatment options, its prognosis remains dismal. New opportunities for the development of effective therapies for malignant gliomas are urgently needed. Magnetohyperthermia consists of heat generation in the region […]