NS 115 - Lecture 28 - Lecture 28 Cancer November 10, 2008...

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Lecture 28 – Cancer November 10, 2008 Cancer o Starts with normal cells o Pre-carcinogens come in through various ways It gets oxidized and absorbed into the cell The cell starts producing abnormal proteins Initiation phase o The cell becomes abnormal o The immune system is supposed to recognize these cells as producing abnormal proteins and remove them o We all probably have cancer but our immune system recognizes them and kills them Sometimes these abnormal cells stay hidden Latent phase – abnormal cell sits there and waits Promotion Phase – an event triggers the cell and it forms a lump of abnormal cells (Stage 1 Cancer – lump formation) This stage is reversible Sometimes these cells start to multiply more and you reach Stage 2 , your immune system is overwhelmed and can’t fight off all the cancer For these cells to multiply requires a lot of energy, more than normal cells Some medications alter metabolisms to starve the cell, but it starves energy everywhere which leads to bad side- effects Some of the cells move there way to the lymph system, it becomes more difficult to remove Stage 3 is when the cells get into the lymph system. Stage 4
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NS 115 - Lecture 28 - Lecture 28 Cancer November 10, 2008...

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