Archive for May, 2012

ASU PSOC Workshop, Wednesday March 21st – Friday March 23rd 2012

Thursday, May 24th, 2012

Mitochondria

Mitochondria are deeply implicated in cancer. They act like little powerhouses within cells that control the energy budget. They are also involved in apoptosis – programmed cell death. When cells become malignant, physical and chemical changes occur in mitochondria, and in the way mitochondria signal the rest of the cell and each other. An early observation of cancer, known as the Warburg effect, is that cancer cells prefer to generate their energy by an alternative chemical pathway known as glycolysis. This pathway is better adapted to low oxygen (hypoxic) conditions, and many solid tumors struggle to receive adequate oxygen. Glycolysis involves profound changes in mitochondria, so understanding the role of mitochondria in the context of the Warburg effect, hypoxia, and apoptosis evasion, could prove to be critical in controlling cancer.
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ASU PSOC Workshop, Monday March 19th – Wednesday March 21st 2012

Thursday, May 24th, 2012

Electrical Properties of Cells

Most cell biology is dominated by focusing on biochemistry, but electromagnetic effects also play a crucial role in regulating cell behavior. Cells maintain an electrical potential difference of a few hundred millivolts across their membranes by actively pumping charged particles. A similar potential difference is maintained across mitochondrial membranes. Electric fields seem to play an organizing role in the transport of key molecules within the cell, and in regulating the traffic of molecules between the cytoplasm and the nucleus. Additional important electromagnetic effects are associated with microtubules. The secret electric life of cells remains largely unexplored territory, but it is clear that the progress of cells from healthy to malignant is accompanied by changes in their electromagnetic signatures, thus offering possible diagnostic opportunities, and even the possibility of controlling malignant progression by manipulating electric and magnetic parameters.
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