上集:三十秒科學–Natural Killer Cell571Please respect copyright.PENANAZflmCBUttN
- 分享自 LIHKG 討論區571Please respect copyright.PENANAAvQsutvppg
https://lih.kg/2548724571Please respect copyright.PENANA0mmPid8lPA
571Please respect copyright.PENANARsRPWzAdl1
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」。571Please respect copyright.PENANAulxVIZfAOC571Please respect copyright.PENANAfRKFdpDewi
既然這麼順利,那為何還會有癌症出現呢?571Please respect copyright.PENANAEIEEZTQ9AB
571Please respect copyright.PENANAbFgoJA1Cqg
(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。571Please respect copyright.PENANAB0y8dVI0KI571Please respect copyright.PENANA6SohBOaeZO
571Please respect copyright.PENANAW68LV9MCvD
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。571Please respect copyright.PENANABD60pDr705
571Please respect copyright.PENANAP8UQ3qCwtV
(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。571Please respect copyright.PENANAUoQxj0XHR3571Please respect copyright.PENANAb5ORe1f8l5
571Please respect copyright.PENANAP3LQDzSVUK
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。571Please respect copyright.PENANAexqYOdhl4x
571Please respect copyright.PENANAlY52LJvBaa
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。571Please respect copyright.PENANAwwyZ8W5eEc
571Please respect copyright.PENANARYEZVK7auc
571Please respect copyright.PENANAi6GJSlntXQ
571Please respect copyright.PENANAWg38cBBO4G
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。571Please respect copyright.PENANANPqA9sjAgw
571Please respect copyright.PENANAFIOco9wrWz
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/toc571Please respect copyright.PENANA0XqVnnRkE3
571Please respect copyright.PENANA9wfM4B8zjb
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。571Please respect copyright.PENANAXTTHLT0ILc
571Please respect copyright.PENANAHQcWB5sATX
Link:571Please respect copyright.PENANA8Cc4M18bwj
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio571Please respect copyright.PENANAWZEh0dnXau
571Please respect copyright.PENANAY8A7RCBSuU
571Please respect copyright.PENANABY84CNa3um
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。571Please respect copyright.PENANAjf2N2RrLU5
571Please respect copyright.PENANAEs6g8hAorl
Ref1:https://cancerres.aacrjournals.org/content/78/19/5631571Please respect copyright.PENANA2pqa7sRwWW
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科普專欄–薯不揀單
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薯仔聞茱莉

篇 #238
三十秒科學–癌細胞逃避NK cell侵襲的一道手段
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