腸道是我們身體其中一道消化器官,其內壁表面含有名為絨毛(villi)的結構,輔助營養的吸收;312Please respect copyright.PENANAn6hZxkpTft
而絨毛與絨毛之間,則有名為crypt的凹陷結構。312Please respect copyright.PENANAS7j58G9Hgj312Please respect copyright.PENANAEiSRWbaMSw
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(圖2)凹陷的crypt結構大多由幹細胞構成,它們會自我複製及演化,且不斷向上發展到達villi結構,形成可負責幫忙吸取營養的細胞。312Please respect copyright.PENANAaaIfy8afKL312Please respect copyright.PENANAb07veMn5mj
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(圖3)若位於crypt的幹細胞出現相應的基因突變(KrasG12D /PIK3CAH1047R ),它們會釋放出界別為BMP activator及WNT inactivator的物質,而當鄰近的正常細胞吸取這些物質後,出現基因突變的機率亦會提升。312Please respect copyright.PENANAo2IYRCw6hK312Please respect copyright.PENANAoCP6kv7mB9
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換句話說,只要一顆位於crypt的幹細胞出現突變的話,便會出現火燒連環船一樣的效果,一傳十十傳百的透導各鄰近的細胞出現異變,成為癌細胞的一份子。312Please respect copyright.PENANA290mjkqBFh
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。312Please respect copyright.PENANAYCtMLfpwNc
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc312Please respect copyright.PENANAEtHwweomri
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。312Please respect copyright.PENANAcL3i1pAlRP
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Link:312Please respect copyright.PENANAymxRMJHfun
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio312Please respect copyright.PENANAVL4ndwR9rR
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除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。312Please respect copyright.PENANAnvKlpepJjg
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Ref1:https://www.nature.com/articles/s41586-021-03605-0
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