化療殺滅癌細胞的效率非常參差,有些情況更反而會導致癌細胞加速生長,究竟為何會這樣?326Please respect copyright.PENANAGTCBObwo0u
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(圖2)使用化療藥物過後,某些癌細胞的確是會歸西死亡。326Please respect copyright.PENANARI0IZYaRN6
而細胞死亡的方式有好幾種,其中兩種為Apoptosis及Necrosis。326Please respect copyright.PENANAKnNuwuXrHx
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如圖中所見,進行Apoptosis的細胞會呈完整球狀,屍體相對的體積較大。326Please respect copyright.PENANABchWI8lOsJ
而進行Necrosis的細胞則會分成為不規則的碎塊,體積亦較細。326Please respect copyright.PENANAhztOCSmtBM
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(圖3)形象化來說,Apoptosis就是曲奇餅,而Necrosis就是曲奇餅碎。326Please respect copyright.PENANAbsoPZlmm6O
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(圖4)癌細胞被化療藥物殺死後,若進行Necrosis,鄰近沒受化療影響的癌細胞便會啟動一道名為Macropinocytosis的機制,將死亡的細胞吞噬,作營養供用使自己繼續成長,抵禦化療藥物所帶來的困境。326Please respect copyright.PENANAcLifLKdVP5
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但細胞進行Apoptosis的話,因屍體體積過大,鄰近的細胞便不能把其吞噬。326Please respect copyright.PENANA2SHqm3C65O
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並不是所有癌細胞亦能懂得施展Macropinocytosis,而整個機制學界亦在模索之中,只知道某些基因如PI3K或Ras進行突變的話,Macropinocytosis發生的機率亦會較大。326Please respect copyright.PENANAIXvyBxESPO
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若能掌握整套機制及研發藥物制止Macropinocytosis的發生,並在化療藥物其間同時使用,便能壓抑癌細胞吞噬死亡細胞的機制,大大增加化療的效果。326Please respect copyright.PENANASQ0MbfcIG7
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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。326Please respect copyright.PENANAGvjKkCyCzw
326Please respect copyright.PENANAQeiMZiAFJj
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/toc326Please respect copyright.PENANAcDpO1BSIaA
326Please respect copyright.PENANAPwt0qTJo2M
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。326Please respect copyright.PENANAt4POKTtYkz
326Please respect copyright.PENANAlm5Yl6PakD
Link:326Please respect copyright.PENANAvk8AvwOVQr
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio326Please respect copyright.PENANATYaGTpVkdB
326Please respect copyright.PENANAdiFWgVNqRd
326Please respect copyright.PENANAgR9xypxpRN
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。326Please respect copyright.PENANAy8er2pQ5lF
326Please respect copyright.PENANAeo9MFun57i
Ref1:https://www.nature.com/articles/s41467-020-14928-3326Please respect copyright.PENANApHP0uCaMg5
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #143
三十秒科學–化療效果參差的其中一道原因
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