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。437Please respect copyright.PENANAvn3t5vG2x5
437Please respect copyright.PENANAtKEGhcxIMq
437Please respect copyright.PENANAe2jrpZyOOB
箇中的原因至少有三:437Please respect copyright.PENANA4FDbbbHFXb
1.致癌基因的表達率增加437Please respect copyright.PENANAQ9VNSUgMwx
2.新陳代謝酶素變異437Please respect copyright.PENANAT53wUGASqI
3.周遭環境缺乏氧氣437Please respect copyright.PENANAZK7VYRgYeC
437Please respect copyright.PENANAtJPhmD3ivS
(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。437Please respect copyright.PENANATv7pgAD1rw
437Please respect copyright.PENANAPxz3foHMyS
437Please respect copyright.PENANADlexqzYAzL
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。437Please respect copyright.PENANAyw58L47X5T
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。437Please respect copyright.PENANAU692maKaSH
437Please respect copyright.PENANANnmH9iLNfJ
(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。437Please respect copyright.PENANAk03J2Z3VDQ
437Please respect copyright.PENANAjyk7P7ciDB
437Please respect copyright.PENANAZrmb4PGOSa
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。437Please respect copyright.PENANA9heNll7y83
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。437Please respect copyright.PENANA7ED0eoIFZt
437Please respect copyright.PENANAxEpWZvv7Hv
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。437Please respect copyright.PENANAmumaJQspUA
437Please respect copyright.PENANAUur5XCpmnk
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?437Please respect copyright.PENANA7eitU96D5u
437Please respect copyright.PENANA2V29NTbKEE
其中的一種渠道,就是從鄰近死去的細胞獲取。437Please respect copyright.PENANAdubGp5vAgX
437Please respect copyright.PENANAZH6mjvw8nV
詳見可閱:437Please respect copyright.PENANAPY9xy6Wjn8
三十秒科學–化療效果參差的其中一道原因437Please respect copyright.PENANAENJqHUaziM
- 分享自 LIHKG 討論區437Please respect copyright.PENANAzKpMHiwWyN
https://lih.kg/2378848437Please respect copyright.PENANAOzqTovawkd
437Please respect copyright.PENANA0fuBDoSHqj
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。437Please respect copyright.PENANAv47ZYvXVfo
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。437Please respect copyright.PENANA6a6bVwsKPO
437Please respect copyright.PENANAmcaVbzR7tC
日復如此,腫瘤亦得以無止境助大。437Please respect copyright.PENANAGYpgTUNxtg
437Please respect copyright.PENANAGowgY6ejfY
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。437Please respect copyright.PENANAkpgkiiPVZT
437Please respect copyright.PENANAnvSK7SMFZR
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/toc437Please respect copyright.PENANAGQGmBQYexx
437Please respect copyright.PENANAp0BLuRgkmm
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。437Please respect copyright.PENANAsNCoj5Yulo
437Please respect copyright.PENANANU9vEHirBi
Link:437Please respect copyright.PENANAuxXGoRz1fj
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio437Please respect copyright.PENANABp4TSJwygf
437Please respect copyright.PENANAjsbKKddKns
437Please respect copyright.PENANAUG3DC0gw4v
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。437Please respect copyright.PENANAzhkqRFYC1f