上集:三十秒科學–Natural Killer Cell630Please respect copyright.PENANAB3aIOnviCW
- 分享自 LIHKG 討論區630Please respect copyright.PENANARncUrD7GgF
https://lih.kg/2548724630Please respect copyright.PENANAdE72QSj7E4
630Please respect copyright.PENANAEgE8PsmST9
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」。630Please respect copyright.PENANAiC6IjeYGhx630Please respect copyright.PENANAvNAFXhvrJl
既然這麼順利,那為何還會有癌症出現呢?630Please respect copyright.PENANAamsnXSZOhA
630Please respect copyright.PENANAzagcHQzPBv
(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。630Please respect copyright.PENANAalnkeErlUN630Please respect copyright.PENANAfbvmKSxBEh
630Please respect copyright.PENANAvLrBIRBESQ
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。630Please respect copyright.PENANAIMKx6sY6QH
630Please respect copyright.PENANA37OnRTHaMe
(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。630Please respect copyright.PENANA0C2qDJ8VFQ630Please respect copyright.PENANAQW8tycFuuX
630Please respect copyright.PENANAyB6MmfBNvG
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。630Please respect copyright.PENANAsux3MwciEu
630Please respect copyright.PENANA22ClJ0kAS7
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。630Please respect copyright.PENANAAMTyRzzul8
630Please respect copyright.PENANAkVEhCdf0bN
630Please respect copyright.PENANAeHryyRCMhw
630Please respect copyright.PENANA9PkHfzC4Hk
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。630Please respect copyright.PENANAsevNQndg4e
630Please respect copyright.PENANA0icRiFNfEm
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/toc630Please respect copyright.PENANADUouWd2zZy
630Please respect copyright.PENANAT5IKaWOXlx
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。630Please respect copyright.PENANAVHe6Q81gRz
630Please respect copyright.PENANADTv2BSnEqk
Link:630Please respect copyright.PENANAreEUvahT9J
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio630Please respect copyright.PENANA9r4FGqzHob
630Please respect copyright.PENANAwI6zEMFhPl
630Please respect copyright.PENANAUYQ2fDbKkv
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。630Please respect copyright.PENANAZhDHVZ8wPg
630Please respect copyright.PENANAXzctjdUunq
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631630Please respect copyright.PENANAuZj5ltMViO