Chapter 12, lecture 7, for April 30, 2008

Chapter 12, lecture 7, for April 30, 2008 - Causes& Risk...

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Unformatted text preview: Causes & Risk Factor s 3: Vir uses • Vir uses: and other infectious agents ar e associated with cancer s – M ay cause decr ease in immune system activity • Kaposi’s sar coma occur s in people with AI DS – Car r y genes that tr ansfor m cells inser t oncogenes into host DNA Causes & Risk Factor s 4: Vir uses – People who had H epatitis B ar e at a 100-fold higher r isk of developing liver cancer ; H epatitis C also associated – Wor ldwide, up to 80% of liver cancer s ar e caused by vir al infections Causes & Risk Factor s 5: Vir uses – Repr oductive or gan cancer s ar e r elated to sexual behavior • Cer vical cancer s r elated to women who wer e younger at the time of their 1 st inter cour se or with multiple par tner s • Also high in countr ies wher e women ar e not pr omiscuous but husbands ar e • H PV causes some types of cer vical cancer —these vir uses account for >80% of genital and What caused this cancer ? • I f a per son has a genetic make- up that pr edisposes her to br east cancer • Weakened immune system as 1 ages combined with pr olonged exposur e to envir onmental factor s • I nfectious agents—can you think of an example that’s widely Causes & Risk Factor s 6: Car cinogens • Physical & Chemical Car cinogens –...
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This note was uploaded on 05/07/2008 for the course BIO 1100 taught by Professor Vanmali during the Spring '08 term at Missouri (Mizzou).

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Chapter 12, lecture 7, for April 30, 2008 - Causes& Risk...

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