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In JoVE (1)
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Articles by Nicole M. McFarlane in JoVE
Processing of Primary Brain Tumor Tissue for Stem Cell Assays and Flow Sorting
Chitra Venugopal1, Nicole M. McFarlane1, Sara Nolte1, Branavan Manoranjan1, Sheila K. Singh1
1Stem Cell and Cancer Research Institute, McMaster University
The identification of brain tumor initiating cells (BTICs), the rare cells within a heterogeneous tumor possessing stem cell properties, provides new insights into human brain tumor pathogenesis. We have refined specific culture conditions to enrich for BTICs, and we routinely use flow cytometry to further enrich these populations. Self-renewal assays and transcript analysis by single cell RT-PCR can subsequently be performed on these isolated cells.
Published September 25, 2012. Keywords: Cancer Biology, Stem Cell Biology, Medicine, Cellular Biology, Molecular Biology, BTIC (brain tumor initiating cells), tumorspheres, self-renewal, flow cytometry, single cell RT-PCR
Other articles by Nicole M. McFarlane on PubMed
Radiation-induced Apoptosis in Mouse Lymphocytes is Modified by a Complex Dietary Supplement: the Effect of Genotype and Gender
Mutagenesis. Nov, 2008 | Pubmed ID: 18644835
This study examined whether radiation sensitivity measured by lymphocyte apoptosis could be ameliorated by a complex anti-oxidant/anti-ageing dietary supplement. We also examined lymphocytes from both genders of normal (Nr) mice as well as transgenic growth hormone (Tg) mice that express strongly elevated reactive oxygen species processes and a progeroid syndrome of accelerated ageing. We introduce Tg mice as a potentially valuable new model to study radiation sensitivity. Isolated lymphocytes from all experimental groups were exposed to gamma radiation and the time course of apoptosis was measured in vitro. Kinetics of radiation-induced apoptosis was similar among groups, which peaked at 8 h, but maximal levels differed significantly between groups. Nr male mice had 60% lower levels of radiation-induced apoptosis than Tg males, supporting our hypothesis that Tg mice would be radiation sensitive. The dietary supplement protected lymphocytes in male mice of both strains, with proportionally greater reductions in Tg mice. Lymphocytes from female mice (both Nr and Tg) were highly radiation resistant compared to males and the supplement provided no additional benefit at the doses used in this study. These results highlight that radiation-induced apoptosis is complex and is modified by genotype, dietary supplements and gender.