上集:三十秒科學–Natural Killer Cell491Please respect copyright.PENANA4sv8ltZidQ
- 分享自 LIHKG 討論區491Please respect copyright.PENANA8BWNMimOrY
https://lih.kg/2548724491Please respect copyright.PENANAwXwvQuxvS1
491Please respect copyright.PENANAg6QIxhP14u
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」。491Please respect copyright.PENANAzPtLfkQujf491Please respect copyright.PENANAnnZyhfbfiB
既然這麼順利,那為何還會有癌症出現呢?491Please respect copyright.PENANAZWgB3AmMNI
491Please respect copyright.PENANAn1NZDM6EuA
(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。491Please respect copyright.PENANAXXLb9UApwi491Please respect copyright.PENANAJdQpyd92r8
491Please respect copyright.PENANAZWcjDbOAIB
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。491Please respect copyright.PENANAPly8bJAsCL
491Please respect copyright.PENANAB4vLO5rlUT
(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。491Please respect copyright.PENANAKtnSQqaE0u491Please respect copyright.PENANAxbx6RRbrbg
491Please respect copyright.PENANAqswPHfkdTu
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。491Please respect copyright.PENANAR4vjuOcsH5
491Please respect copyright.PENANA9hb6UfFP9T
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。491Please respect copyright.PENANAhP6de3nG5O
491Please respect copyright.PENANAZl7zYKeEhq
491Please respect copyright.PENANAUYauPDiaTS
491Please respect copyright.PENANAKVT441xwB7
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。491Please respect copyright.PENANAIfquh3QZSx
491Please respect copyright.PENANArtbW3sY2E6
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/toc491Please respect copyright.PENANAyNgxNXGHr2
491Please respect copyright.PENANAPfrTwApnV6
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。491Please respect copyright.PENANAm2FxOKOR4C
491Please respect copyright.PENANA1AxVjudluq
Link:491Please respect copyright.PENANA59GMvKEWEv
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio491Please respect copyright.PENANA9WOVAB27sB
491Please respect copyright.PENANA6oFL2kfXlU
491Please respect copyright.PENANA2Otn6nDglj
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。491Please respect copyright.PENANALeoG73AQPf
491Please respect copyright.PENANAkDxnUg9aSD
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631491Please respect copyright.PENANAx08TGnrfYw