癌細胞經常被描繪為極度嗜糖。的而且確,大部份的癌細胞對比同等類型的正常細胞均會攝取更多的糖份。592Please respect copyright.PENANAhthbOEVQRY592Please respect copyright.PENANASIHDIXeKnr
592Please respect copyright.PENANAgwJksNf9Aj
箇中的原因至少有三:592Please respect copyright.PENANAn5h6ZHlhqz
1.致癌基因的表達率增加592Please respect copyright.PENANAntROGeWjXr
2.新陳代謝酶素變異592Please respect copyright.PENANA8ntwKZoG2y
3.周遭環境缺乏氧氣592Please respect copyright.PENANARSdfWjCMSV
592Please respect copyright.PENANAYZE9IwWV1p
(圖2)沒有氧氣的話,脂肪及氨基酸並不能轉化成為可供細胞所用的能源。592Please respect copyright.PENANAg9l8haQpxF592Please respect copyright.PENANAxFhARvWwrv
592Please respect copyright.PENANAW8V6BY431E
然而,糖份在擁有氧氣或缺乏氧氣的情況下,均可轉化成為能源。592Please respect copyright.PENANA5zqKFuIwoM
因此,當癌細胞處於缺氧狀態的時候,便會增加對糖份的依賴。592Please respect copyright.PENANAK2hIpb0ge3
592Please respect copyright.PENANATmbKNFL0WG
(圖3)正常的細胞有著一套完善的機制控制著其生長速度,而這些機制大多數時候均會在癌細胞發發生的基因變異影響下作廢,促使癌細胞能夠無止境地生長及繁殖。592Please respect copyright.PENANAQx7c2u0AQo592Please respect copyright.PENANA4cTajArhut
592Please respect copyright.PENANADuiFScGEDj
當一個細胞需要繁殖的時候,細胞膜以及DNA是不可或缺的元件。592Please respect copyright.PENANA5fTyNZlxbL
而在糖份分解的過程中,所涉及的代謝物均能參與細胞膜和DNA的製作。592Please respect copyright.PENANARdEKKj2u4L
592Please respect copyright.PENANAdUnHdfAci6
亦即是說,癌細胞不斷無止境地生長,導致內部位置沒有足夠氧氣,正好更能觸發更多糖份的攝取,繼續製作繁殖所需的細胞組件。592Please respect copyright.PENANABgls9Kt0Sg
592Please respect copyright.PENANAcS7bodEegw
但是,若氧氣沒能抵達癌細胞的話,那又如何能夠獲取營養呢?592Please respect copyright.PENANAUW1Gg1QQYM
592Please respect copyright.PENANAF6RGm8siCC
其中的一種渠道,就是從鄰近死去的細胞獲取。592Please respect copyright.PENANAyeMFQFrWQP
592Please respect copyright.PENANA27m4O0IghM
詳見可閱:592Please respect copyright.PENANAGvYA8BgGmo
三十秒科學–化療效果參差的其中一道原因592Please respect copyright.PENANASKzWcIhGHB
- 分享自 LIHKG 討論區592Please respect copyright.PENANAKjj3vPRIEd
https://lih.kg/2378848592Please respect copyright.PENANAAWFfD9qyhk
592Please respect copyright.PENANA966o4koqJa
正因如此,腫瘤的核心大多是已死去的細胞,而其外部則是不斷繁殖的細胞。592Please respect copyright.PENANANWUGDyvGiu
而經過一段時間的繁殖後,早前的「外部」細胞便成為「核心」,成為鄰近細胞的糧食。592Please respect copyright.PENANAHXnHG4bEWG
592Please respect copyright.PENANAboQeYgDVCB
日復如此,腫瘤亦得以無止境助大。592Please respect copyright.PENANAIPia9PNJgL
592Please respect copyright.PENANAOU85Xnunlx
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。592Please respect copyright.PENANAaWE2gMw8iq
592Please respect copyright.PENANAsq25zgDTM0
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/toc592Please respect copyright.PENANAgCyt7B51VT
592Please respect copyright.PENANA5Tonou8WF1
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。592Please respect copyright.PENANAwRqOcxlwXg
592Please respect copyright.PENANAjN2MC9Fi4r
Link:592Please respect copyright.PENANAImmRCXQfhs
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio592Please respect copyright.PENANAn5S3TlzK6M
592Please respect copyright.PENANAXibIKCMQA7
592Please respect copyright.PENANA457WLj4E2G
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。592Please respect copyright.PENANA4aTayJ3sVJ