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Interaction of Bone Marrow-Derived Mesenchymal Stem Cells on Neuroblastoma Cells

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Interaction of Bone Marrow-Derived Mesenchymal Stem Cells on Neuroblastoma Cells by Rebecca Sze-Wai Kwong
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This dissertation, "Interaction of Bone Marrow-derived Mesenchymal Stem Cells on Neuroblastoma Cells" by Rebecca Sze-Wai, Kwong, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: ´╗┐BackgroundMesenchymal stem cells (MSC) were first discovered in the 1970s by scientist A.J. Friedenstein and his colleagues. Friedenstein isolated the first mesenchymal stem cells and was credited for discovering its multilineage differentiation potential. To this day, an extensive amount of research has been conducted on the use of these cells in the treatment of degenerative diseases and various autoimmune disorders. Its migratory ability and immunosuppressive characteristics make MSCs advantageous in an inflammatory environment. Recently, MSCs were also found to have the ability to phagocytose apoptotic bodies generated from T-cells and B-cells. ObjectivesIn this study, we sought to investigate the phagocytic capability of MSCs further in a cancer setting and observe whether or not MSCs could become immunostimulatory cells after phagocytosis of apoptotic cancer cells. MethodsTo conduct this study, we first used UV-irradiation to generate apoptotic cells from 3 neuroblastoma (NB) cell lines. After apoptotic NB cells were generated, they were then co-cultured with MSCs for phagocytosis to occur. To detect phagocytosis, we stained the apoptotic NB cells with a red fluorescent dye PKH-26 and MSCs with CFSE, a green fluorescent dye. Then, we used flow cytometry to detect the percentage of phagocytosis. After phagocytosis, we collected the supernatants from the MSCs treated with the apoptotic NB cells and observed how the IL-6 and IL-8 cytokine levels changed compared to the levels from the supernatant of the MSCs only. Results and ConclusionsAfter conducting this experiment, our results showed that in a cancer environment MSCs were able to phagocytose apoptotic NB cells. Furthermore, after phagocytosis the IL-6 and IL-8 cytokine levels increased significantly in the MSCs treated with apoptotic NB cells compared to the control group with MSCs only. Since IL-6 and IL-8 are both considered pro-inflammatory cytokines, we can conclude that after phagocytosis of apoptotic NB cells, MSCs can become immunostimulatory cells. To further confirm our findings, various other cytokines should be tested and more experiments should be done. This way, a more complete picture can be generated describing how MSC cytokine secretion activity changes after phagocytosis of apoptotic neuroblastoma cells. DOI: 10.5353/th_b4854148 Subjects: Stem cellsNeuroblastoma
Release date NZ
January 26th, 2017
Illustrations
colour illustrations
Country of Publication
United States
Imprint
Open Dissertation Press
Dimensions
216x279x6
ISBN-13
9781361303153
Product ID
26644603

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