上集:三十秒科學–Natural Killer Cell635Please respect copyright.PENANA1vd95nONeB
- 分享自 LIHKG 討論區635Please respect copyright.PENANA8kjB4wtyms
https://lih.kg/2548724635Please respect copyright.PENANA6Vr8WyxPpE
635Please respect copyright.PENANAWasy2Nwtyt
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」。635Please respect copyright.PENANA88v0Cgatjt635Please respect copyright.PENANA4tp1gix4FN
既然這麼順利,那為何還會有癌症出現呢?635Please respect copyright.PENANAeSqRR7Ftci
635Please respect copyright.PENANAMcgnEyn3xl
(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。635Please respect copyright.PENANAAy4SgqpMNX635Please respect copyright.PENANAEvK7wpZv1X
635Please respect copyright.PENANAFuaak3lOJu
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。635Please respect copyright.PENANAzbntqp9X4f
635Please respect copyright.PENANATVF00qcz3r
(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。635Please respect copyright.PENANA1QIcY1A3oH635Please respect copyright.PENANAWQt2A6MoZo
635Please respect copyright.PENANA4qsDi1g9XS
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。635Please respect copyright.PENANAanjrWNo5Hk
635Please respect copyright.PENANAEfeYkcGQA2
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。635Please respect copyright.PENANAOgXM5pVwKz
635Please respect copyright.PENANAwVHmPhQtkX
635Please respect copyright.PENANAu0WCtI9wEg
635Please respect copyright.PENANAB1kRqvAsPz
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。635Please respect copyright.PENANATiJAimW97z
635Please respect copyright.PENANAHWghKPXwZc
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/toc635Please respect copyright.PENANAnqrkrozMlO
635Please respect copyright.PENANAMsKJkwRuuD
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。635Please respect copyright.PENANADlO26u8y36
635Please respect copyright.PENANAwgcWhfbuuQ
Link:635Please respect copyright.PENANALGUH9MqyDE
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio635Please respect copyright.PENANAxoeggtVmby
635Please respect copyright.PENANAKdZupmkc9R
635Please respect copyright.PENANAgVomexaS2D
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。635Please respect copyright.PENANAsSL99WHvV0
635Please respect copyright.PENANAbYVR4gC6F7
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631635Please respect copyright.PENANAbz5YCOPeDo