上集:三十秒科學–Natural Killer Cell577Please respect copyright.PENANAQySbPnvk60
- 分享自 LIHKG 討論區577Please respect copyright.PENANAPgPLe2XtSt
https://lih.kg/2548724577Please respect copyright.PENANAGw3YbrdjHg
577Please respect copyright.PENANAmPdIbLZmW1
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」。577Please respect copyright.PENANAODqrRn9RFx577Please respect copyright.PENANAftLPfVNKGW
既然這麼順利,那為何還會有癌症出現呢?577Please respect copyright.PENANA7h1jEdWBsa
577Please respect copyright.PENANAaGr81Ex9IR
(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。577Please respect copyright.PENANA99vkE932bJ577Please respect copyright.PENANA8boBhxmTvb
577Please respect copyright.PENANAhT48uPRsiZ
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。577Please respect copyright.PENANAtjAEFGfEQM
577Please respect copyright.PENANAp47TFbEkSw
(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。577Please respect copyright.PENANAiMmRq5H9xB577Please respect copyright.PENANAZY91yCQKDo
577Please respect copyright.PENANATk9e6mtPiE
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。577Please respect copyright.PENANAqtHxSG969x
577Please respect copyright.PENANAKAUXxnBD7B
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。577Please respect copyright.PENANA5WeeGLVK8t
577Please respect copyright.PENANATviRrjzCqP
577Please respect copyright.PENANA88G8VsAI3Q
577Please respect copyright.PENANAyav6zNOw9d
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。577Please respect copyright.PENANAk6Bq0WIdRC
577Please respect copyright.PENANAqicI4p2B6n
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/toc577Please respect copyright.PENANAB2PIcDpWvf
577Please respect copyright.PENANAwOw5m7xTOO
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。577Please respect copyright.PENANA7tvFWgIBus
577Please respect copyright.PENANASAEHqBAddc
Link:577Please respect copyright.PENANAy518xOJAP8
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio577Please respect copyright.PENANA4534evEZpT
577Please respect copyright.PENANASDUBt2N1Hj
577Please respect copyright.PENANAtQctGfeOsu
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。577Please respect copyright.PENANAY8s1GmBcdS
577Please respect copyright.PENANAHvU7rjdDSj
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631577Please respect copyright.PENANAlP5hVquxAn