All publications of “Tatiana Taís Sibov”

6 results

Isolation, cultivation and characterization of CD133+ stem cells from human glioblastoma

Lorena Favaro Pavon, Luciana Cavalheiro Marti, Tatiana Tais Sibov, Liza Aya Mabuchi Miyaki, Suzana Maria Fleury Malheiros, Javier Bustamante Mamani, [...]

DOI: 10.1590/S1679-45082012000200013

Objective:To establish the method of isolation and culture of human glioblastoma neurospheres, and the purification of their stem cells, followed by the process of obtaining tumor subspheres, immunophenotypically characterizing this clonogenic set.METHODS:Through the processing of glioblastoma samples (n=3), the following strategy of action was adopted: (i) establish primary culture of glioblastoma; (ii) isolation and culture of tumor neurospheres; (iii) purify cells that initiate tumors (CD133+) by magnetic separation system (MACS); (iv) obtain tumor subspheres; (v) study the expression of the […]

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 […]

Evaluation of umbilical cord mesenchymal stem cell labeling with superparamagnetic iron oxide nanoparticles coated with dextran and complexed with Poly-L-lysine

Tatiana Taís Sibov, Liza Aya Mabuchi Miyaki, Javier Bustamante Mamani, Luciana Cavalheiro Marti, Luiz Roberto Sardinha, Lorena Favaro Pavon, [...]

DOI: 10.1590/S1679-45082012000200011

Objective:The objective of this study was to evaluate the effect of the labeling of umbilical cord vein derived mesenchymal stem cells with superparamagnetic iron oxide nanoparticles coated with dextran and complexed to a non-viral transfector agent transfector poly-L-lysine.METHODS:The labeling of mesenchymal stem cells was performed using the superparamagnetic iron oxide nanoparticles/dextran complexed and not complexed to poly-L-lysine. Superparamagnetic iron oxide nanoparticles/dextran was incubated with poly-L-lysine in an ultrasonic sonicator at 37°C for 10 minutes for complex formation superparamagnetic iron oxide […]

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 […]

Tumor growth analysis by magnetic resonance imaging of the C6 glioblastoma model with prospects for the assessment of magnetohyperthermia therapy

André César da Silva, Francisco Romero Cabral, Javier Bustamante Mamani, Jackeline Moraes Malheiros, Roberson Saraiva Polli, Alberto Tannus, [...]

DOI: 10.1590/S1679-45082012000100004

Objective:The objective was to establish a pattern of tumor growth of the C6 model of glioblastoma multiform in Wistar rats via magnetic resonance imaging (MRI) for the subsequent verification of tumor volume reduction due to magnetic hyperthermia therapy.METHODS:Young male Wistar rats weighing between 250 and 300 g were used for the C6 model. After the rates were anesthetized (55 mg/kg ketamine and 11 mg/kg xylazine), C6 lineage tumorigenic cells suspended in culture medium (10(5) cells in 10 µl) were stereotaxically […]

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 […]