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。575Please respect copyright.ＰＥＮＡＮＡ8gK3xtPuG0
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箇中的原因至少有三:575Please respect copyright.ＰＥＮＡＮＡp3ivMpxSMu
1.致癌基因的表達率增加575Please respect copyright.ＰＥＮＡＮＡsdTylWffoz
2.新陳代謝酶素變異575Please respect copyright.ＰＥＮＡＮＡfR0AszauBV
3.周遭環境缺乏氧氣575Please respect copyright.ＰＥＮＡＮＡiDDLejaVFB
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（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。575Please respect copyright.ＰＥＮＡＮＡI1mIPDq8rP
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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。575Please respect copyright.ＰＥＮＡＮＡ2RKltLZ7bx
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。575Please respect copyright.ＰＥＮＡＮＡwR2KbkSnkb
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（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。575Please respect copyright.ＰＥＮＡＮＡ6SzBFB69NX
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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。575Please respect copyright.ＰＥＮＡＮＡlj7zS7bip9
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。575Please respect copyright.ＰＥＮＡＮＡl8DjPRXyT9
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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。575Please respect copyright.ＰＥＮＡＮＡeNzjVECK1K
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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？575Please respect copyright.ＰＥＮＡＮＡ6s4kOQS06s
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其中的一種渠道，就是從鄰近死去的細胞獲取。575Please respect copyright.ＰＥＮＡＮＡj8SpQSayLc
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詳見可閱：575Please respect copyright.ＰＥＮＡＮＡsvH3n9Gn4U
三十秒科學–化療效果參差的其中一道原因575Please respect copyright.ＰＥＮＡＮＡpqBHQUccgb
- 分享自 LIHKG 討論區575Please respect copyright.ＰＥＮＡＮＡdJ7Xz54ORn
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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。575Please respect copyright.ＰＥＮＡＮＡDAD1S9R3gb
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。575Please respect copyright.ＰＥＮＡＮＡjMpOHSUKgg
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日復如此，腫瘤亦得以無止境助大。575Please respect copyright.ＰＥＮＡＮＡsq6OIvf3df
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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。575Please respect copyright.ＰＥＮＡＮＡ3CkIVmVo0w
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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。575Please respect copyright.ＰＥＮＡＮＡb7xN8gjDDy
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https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio575Please respect copyright.ＰＥＮＡＮＡPgNigWPSOI
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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。575Please respect copyright.ＰＥＮＡＮＡykyIIXCG3w
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