上集:三十秒科學–Natural Killer Cell637Please respect copyright.PENANA1lJu0t9MeX
- 分享自 LIHKG 討論區637Please respect copyright.PENANAbJl3SmeRDi
https://lih.kg/2548724637Please respect copyright.PENANAtwKqQr3KY2
637Please respect copyright.PENANAoby7OPQh3u
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」。637Please respect copyright.PENANAMW0axRqqH0637Please respect copyright.PENANAdbayxSO1lM
既然這麼順利,那為何還會有癌症出現呢?637Please respect copyright.PENANAsYb70aXypY
637Please respect copyright.PENANA3UrkanjLSZ
(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。637Please respect copyright.PENANAeBPFwu47gV637Please respect copyright.PENANAo6c0WK9yT3
637Please respect copyright.PENANAe7BYqmTAAq
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。637Please respect copyright.PENANAKbOfrK2DDw
637Please respect copyright.PENANAlkJLceUD7k
(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。637Please respect copyright.PENANAH3svjr6Ecn637Please respect copyright.PENANA2v1srhb6HT
637Please respect copyright.PENANAn5Ci1aKHl0
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。637Please respect copyright.PENANAJVIdjPuiBR
637Please respect copyright.PENANAKTrlXIwiMA
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。637Please respect copyright.PENANAMZ7s3nyaOx
637Please respect copyright.PENANAnOT5KzGy1V
637Please respect copyright.PENANABgWgLVDtTF
637Please respect copyright.PENANALhELk5CD7V
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。637Please respect copyright.PENANAeGmfAHu8Sd
637Please respect copyright.PENANAcTuthor7qT
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/toc637Please respect copyright.PENANAJD1YFrkqjp
637Please respect copyright.PENANAJgKfP656Xl
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。637Please respect copyright.PENANAyMklojOFk4
637Please respect copyright.PENANAfUZNedIbC0
Link:637Please respect copyright.PENANAefNMqcbsrM
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio637Please respect copyright.PENANAj8cJsHmSLk
637Please respect copyright.PENANArYw0ybDNYP
637Please respect copyright.PENANAfVPu7yrU1b
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。637Please respect copyright.PENANAlz03JsXmso
637Please respect copyright.PENANA0qjuoq2DJ5
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631637Please respect copyright.PENANAjXlMk2wed6