癌細胞所在的環境裡,佈滿各式各樣的細胞。244Please respect copyright.PENANALmDA29hqmn
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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。244Please respect copyright.PENANAddn5iRc12f
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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。244Please respect copyright.PENANAxe2u3GUSuc
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(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。244Please respect copyright.PENANADAN8FLCFH8
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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。244Please respect copyright.PENANA1Es2EoEYCq
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反之,癌細胞吸取麩醯胺酸的速度則比免疫細胞的為快。244Please respect copyright.PENANAifbmUmzOoS
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(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。244Please respect copyright.PENANAvJMDSrEAV5
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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。244Please respect copyright.PENANA3yQbOC93rz
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(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%。244Please respect copyright.PENANAE7sVdo0RmE
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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。244Please respect copyright.PENANAg2K9pQP0l3
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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。244Please respect copyright.PENANA4hENCSmHe4
244Please respect copyright.PENANAbebFQX3YhO
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/toc244Please respect copyright.PENANAQ3prux9HbR
244Please respect copyright.PENANAH5IJVdIUcs
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。244Please respect copyright.PENANAxOeoh9ksej
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Link:244Please respect copyright.PENANAbJFUn9ch0H
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio244Please respect copyright.PENANA7945NiNY0Z
244Please respect copyright.PENANAqufyJp0aZK
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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。244Please respect copyright.PENANAhINRK97dGe
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Ref1https://www.nature.com/articles/s41586-021-03442-1#MOESM3244Please respect copyright.PENANA4IeqXGbJMy
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #206
三十秒科學–癌細胞與免疫細胞之間的營養爭奪
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