上集:三十秒科學–Natural Killer Cell572Please respect copyright.PENANAcmA8NssfEU
- 分享自 LIHKG 討論區572Please respect copyright.PENANAeouGMYNbht
https://lih.kg/2548724572Please respect copyright.PENANAOWl6AqggyS
572Please respect copyright.PENANAEwELiR4duk
上集提及過NK cell有著殺滅癌細胞的本領,如圖中所見,紅色的NK cell遇上綠色的癌細胞後,在1小時打後可以見得到癌細胞開始變形,更在74分鐘打後「灰飛煙滅」。572Please respect copyright.PENANA6ScC13dBUb572Please respect copyright.PENANA2YBpE7dQK2
既然這麼順利,那為何還會有癌症出現呢?572Please respect copyright.PENANATi4qBX3XIx
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(圖2)這是因為癌細胞有著各樣的手段對抗NK cell的襲擊,明哲保身。572Please respect copyright.PENANA8TsWoNp0RS572Please respect copyright.PENANAjK6cq9MwAG
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從圖中的例子可以看到,這一次NK cell與癌細胞接觸約36分鐘後,不但沒有襲擊癌細胞,更以那兩名香港警察先鋒對待721的方式逃逸離去,使癌細胞得以安然無恙活下去。572Please respect copyright.PENANA7qJrf9tqcT
572Please respect copyright.PENANAsh3miRQHDK
(圖3)科學家發現,較能對抗NK cell的癌細胞有著一道應付NK cell的本領,它們遇上NK cell後會快速改變自身的蛋白質結構,將歸納名為actin的蛋白質速速調配至與NK cell的接觸點,形成圖中綠色區域的聚集。572Please respect copyright.PENANAZjY0fAIQpU572Please respect copyright.PENANAsa3Yhy3W8r
572Please respect copyright.PENANA9qmX2UtLUl
這些actin蛋白質的調動,促使抑制NK cell的蛋白質大量且集中聚積到與NK cell的接觸點(上集所指的 – 號組合),導致NK cell失去殺滅癌細胞的功能,並且與癌細胞作出脫離。572Please respect copyright.PENANAPeBzu0ooCZ
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而沒能對抗NK cell的癌細胞並沒有出現actin蛋白質的調整,相對上因而較易遭受到NK cell的侵襲。572Please respect copyright.PENANA9FRzyweAmB
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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。572Please respect copyright.PENANAM9np0lfZwX
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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/toc572Please respect copyright.PENANAwzu1I95XOH
572Please respect copyright.PENANADb1Gnpw8yL
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。572Please respect copyright.PENANAaiJzHx7umn
572Please respect copyright.PENANAQmhsGzSHrP
Link:572Please respect copyright.PENANAjbi0eMcN1e
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio572Please respect copyright.PENANA6U7RtBOETc
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572Please respect copyright.PENANAWfQh767Qes
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。572Please respect copyright.PENANAbKnYB8YAzR
572Please respect copyright.PENANAgBSGcaa0bG
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631572Please respect copyright.PENANAsLtDKZVmJS
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科普專欄–薯不揀單
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薯仔聞茱莉

篇 #238
三十秒科學–癌細胞逃避NK cell侵襲的一道手段
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