科普專欄–薯不揀單 - 三十秒科學–癌細胞與免疫細胞之間的營養爭奪

癌細胞所在的環境裡，佈滿各式各樣的細胞。463Please respect copyright.ＰＥＮＡＮＡCt4XM9HB3f
463Please respect copyright.ＰＥＮＡＮＡxY6zrjZOHS
463Please respect copyright.ＰＥＮＡＮＡmiiIjMJh0m
當中有為數不少的是免疫細胞，只可是癌細胞發展出不同的機制躲避免疫細胞的攻勢，因此周遭的免疫細胞並沒能發揮其殺滅不良細胞的功效。463Please respect copyright.ＰＥＮＡＮＡ8haRYL2qUg
463Please respect copyright.ＰＥＮＡＮＡ91CnKrWzjM
無論如何，它們同在一個環境裡，無可避免要面對一個問題，就是如何分配糧食。463Please respect copyright.ＰＥＮＡＮＡ6iU8Jipksj
463Please respect copyright.ＰＥＮＡＮＡtwQU6VbKoQ
(圖2)在癌細胞所在的環境裡，以葡萄糖(Glucose)及麩醯胺酸(Glutamine)為營養界別含量最多的兩大元首。463Please respect copyright.ＰＥＮＡＮＡ6ctFrL2DpV
463Please respect copyright.ＰＥＮＡＮＡk45YXgPDQi
463Please respect copyright.ＰＥＮＡＮＡsVsTWKyVdR
研究發現，如果對比單一細胞的營養吸收速度的話，免疫細胞吸取葡萄糖的速度比癌細胞的為快。463Please respect copyright.ＰＥＮＡＮＡQJUM9FywHL
463Please respect copyright.ＰＥＮＡＮＡbUaMdtXQgr
反之，癌細胞吸取麩醯胺酸的速度則比免疫細胞的為快。463Please respect copyright.ＰＥＮＡＮＡf2i58V6ANR
463Please respect copyright.ＰＥＮＡＮＡHcdBw0SX9C
463Please respect copyright.ＰＥＮＡＮＡ6wTqWu0WNM
(圖3)重要的是，如果利用藥物阻截兩款細胞吸取麩醯胺酸的話，它們均會啟動機制加快吸收葡萄糖的速度，從而彌補營養所需。463Please respect copyright.ＰＥＮＡＮＡKDaUgEohro
463Please respect copyright.ＰＥＮＡＮＡvgybTGgTuq
463Please respect copyright.ＰＥＮＡＮＡvWRz2I2HMN
換句話說，它們配備使用及吸收兩種營養的能力，可根據環境供求而隨時變陣。463Please respect copyright.ＰＥＮＡＮＡKSLT7C0GiQ
463Please respect copyright.ＰＥＮＡＮＡtvEOniHXjG
463Please respect copyright.ＰＥＮＡＮＡuOh5bylFKa
(圖4)雖然免疫細胞吸取葡萄糖的速度比癌細胞的為快，但如果計算整個環境的吸收總量的話，基於癌細胞數量多於免疫細胞，癌細胞共吸收環境葡萄糖總量達70%有多，而其餘免疫細胞的吸取量則只佔餘下的30%。463Please respect copyright.ＰＥＮＡＮＡBtW8qtvyPG
463Please respect copyright.ＰＥＮＡＮＡM0K3D2YwRZ
463Please respect copyright.ＰＥＮＡＮＡ1p4vMCbzdD
亦即是說，依靠葡萄糖吸取量來探測癌細胞存在的技術(FDG-PET)，其癌細胞所在的環境至少有30%的訊號是來自免疫細胞，而非癌細胞。463Please respect copyright.ＰＥＮＡＮＡKj6yO5HLkD
463Please respect copyright.ＰＥＮＡＮＡ4f7yP3i5Qx
463Please respect copyright.ＰＥＮＡＮＡIB75NKpCjJ
463Please respect copyright.ＰＥＮＡＮＡHkEixJEvyK
463Please respect copyright.ＰＥＮＡＮＡugmOLB3Kss
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。463Please respect copyright.ＰＥＮＡＮＡHm137U0aFD
463Please respect copyright.ＰＥＮＡＮＡ4IBxtbx5vI
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/toc463Please respect copyright.ＰＥＮＡＮＡEsD93NI2Qg
463Please respect copyright.ＰＥＮＡＮＡS8PEf4RjRS
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。463Please respect copyright.ＰＥＮＡＮＡvboUKqm3i4
463Please respect copyright.ＰＥＮＡＮＡqmiYC6ai6i
Link:463Please respect copyright.ＰＥＮＡＮＡrFqPL3tHLP
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio463Please respect copyright.ＰＥＮＡＮＡ4eyEHBTbWF
463Please respect copyright.ＰＥＮＡＮＡNdguDh2FyU
463Please respect copyright.ＰＥＮＡＮＡVVP8jh8q8i
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。463Please respect copyright.ＰＥＮＡＮＡTxhEj8ltMl
463Please respect copyright.ＰＥＮＡＮＡXsbcpbVllE
Ref1https://www.nature.com/articles/s41586-021-03442-1#MOESM3463Please respect copyright.ＰＥＮＡＮＡprsyrx5tqH

ns216.73.216.237da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章