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Home > Medicine & Health Science textbooks > Pre-clinical medicine: basic sciences > The Effect of Glycogen Metabolism on the Regulation of Reactive Oxidative Species Level in Cultured Cancer Cells
The Effect of Glycogen Metabolism on the Regulation of Reactive Oxidative Species Level in Cultured Cancer Cells

The Effect of Glycogen Metabolism on the Regulation of Reactive Oxidative Species Level in Cultured Cancer Cells


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About the Book

This dissertation, "The Effect of Glycogen Metabolism on the Regulation of Reactive Oxidative Species Level in Cultured Cancer Cells" by Pui-ying, Tam, 譚佩盈, 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: Glycogen is known to act as a fuel reserve in organs such as skeletal muscle and liver. Glycogen is also known to accumulate in many cancer cells suggesting a possible role for glycogen metabolism in cancers. Recently, studies using cancer cells that do not express glycogen phosphorylase showed that these cells had elevated level of reactive oxygen species (ROS). How inhibition of expression of glycogen phosphorylase may lead to increase in ROS level in tumour cells is not certain. It is hypothesised in this study that the accumulation of glycogen resulting from inhibition of its breakdown may lead to ROS production. Results of this study showed that inhibition of expression of glycogen synthase (GS) lead to almost 100% absence of glycogen and increase in intracellular ROS in the GS knockout cells. When compared to wild type cells, ROS level of cells lacking GS were higher irrespective of the absence or presence of glucose or glutamine. However, both wild type cells and GS knockout cells had similar levels of ROS in the absence of both glucose and glutamine. It is concluded that glycogen accumulation does not contribute to the increase of ROS due to inhibition of expression of glycogen synthase. Furthermore, the results of this study suggested that both wild type and GS knockout cells produce same amount of ROS through glucose and glycogen metabolism. Additional experiments demonstrated GS knockout cells exhibited increase expression of catalase, thioredoxin and Nrf2. Suggesting that the antioxidant mechanisms are involved in counteracting the increase in oxidative stress in GS knockout cells. Subjects: Glycogen - Metabolism Oxidative stress


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Product Details
  • ISBN-13: 9781361018170
  • Publisher: Open Dissertation Press
  • Publisher Imprint: Open Dissertation Press
  • Height: 279 mm
  • No of Pages: 132
  • Weight: 322 gr
  • ISBN-10: 1361018178
  • Publisher Date: 26 Jan 2017
  • Binding: Paperback
  • Language: English
  • Spine Width: 7 mm
  • Width: 216 mm


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