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?327Please respect copyright.PENANAaXjauqJWf7
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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。327Please respect copyright.PENANADtjayvugdP
而細胞死亡的方式有好幾種,其中兩種為Apoptosis及Necrosis。327Please respect copyright.PENANASYctPEWYYQ
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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。327Please respect copyright.PENANArl1OLVZ8Td
而進行Necrosis的細胞則會分成為不規則的碎塊,體積亦較細。327Please respect copyright.PENANA6qT5AgTzih
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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。327Please respect copyright.PENANAAXKUDmImdV
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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。327Please respect copyright.PENANAFyZ4DlevKd
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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。327Please respect copyright.PENANAG0erqVGSUh
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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。327Please respect copyright.PENANAkfGUokdEMt
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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。327Please respect copyright.PENANAhMNRG16E7a
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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。327Please respect copyright.PENANAkApfyEPAdz
327Please respect copyright.PENANAW3G9KGsjA1
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/toc327Please respect copyright.PENANASscme6ROXB
327Please respect copyright.PENANAummecYwm4g
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。327Please respect copyright.PENANAAbYqMtQ1HT
327Please respect copyright.PENANA4K13ejjdS3
Link:327Please respect copyright.PENANAvnRxNX3gjy
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio327Please respect copyright.PENANAecnUKvzhZD
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327Please respect copyright.PENANAIK4LoDQYXt
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。327Please respect copyright.PENANAVJLIMf5a5B
327Please respect copyright.PENANAre9LOKUqf2
Ref1:https://www.nature.com/articles/s41467-020-14928-3327Please respect copyright.PENANAUy0msBHxkt
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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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