5 results

Isolation and characterization of mesenchymal stem cells obtained from reusable and disposable bone marrow collection filters

Glaziane Cordeiro de Deus, Marilia Normanton, Nelson Hamerschlak, Andrea Tiemi Kondo, Andreza Alice Feitosa Ribeiro, Anna Carla Goldberg, [...]

DOI: 10.1590/S1679-45082012000300007

Objective:To compare human mesenchymal stem cells obtained from reusable and disposable filters and to characterize them according to the criteria of the International Society of Cellular Therapy.METHODS:Human mesenchymal stem cells were isolated from bone marrow collection reusable sets and compared with those obtained from disposable sets by washing the filters with cell culture media. The isolated cells were characterized according to the criteria of the International Society of Cellular Therapy using flow cytometry, differentiation in vitro, and cytochemistry techniques.RESULTS:Samples were […]

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 […]

Immunomodulatory effect of mesenchymal stem cells

Luciana Cavalheiro Marti, Andreza Alice Feitosa Ribeiro, Nelson Hamerschlak

DOI: 10.1590/S1679-45082011RW1843

ABSTRACT Mesenchymal stem cells represent an adult population of nonhematopoietic cells, which can differentiate into a variety of cell types such as osteocytes, chondrocytes, adipocytes, and myocytes. They display immunomodulatory properties that have led to the consideration of their use for the inhibition of immune responses. In this context, mesenchymal stem cells efficiently inhibit maturation, cytokine production, and the T cell stimulatory capacity of dendritic cells. They also can impair proliferation, cytokine secretion, and cytotoxic potential of T lymphocytes. Moreover, […]

Role of adipose tissue-derived stem cells in the progression of renal disease

Cassiano Donizetti-Oliveira, Patricia Semedo, Marina Burgos-Silva, Marco Antonio Cenedeze, Denise Maria Avancini Costa Malheiros, Marlene Antônia dos Reis, [...]

DOI: 10.1590/S1679-45082011AO1833

ABSTRACT Objective: To analyze the role of adipose tissue-derived stem cells in reducing the progression of renal fibrosis. Methods: adipose tissue-derived stem cells were isolated from C57Bl/6 mice and characterized by cytometry and differentiation. Renal fibrosis was established after unilateral clamping of the renal pedicle for 1 hour. Four hours after reperfusion, 2.105 adipose tissue-derived stem cells were administered intraperitoneally and the animals were followed for 24 hours during 6 weeks. In another experimental group, 2.105 adipose tissue-derived stem cells […]