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。579Please respect copyright.ＰＥＮＡＮＡ1bnbQOLIq5
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箇中的原因至少有三:579Please respect copyright.ＰＥＮＡＮＡqPo6vv8BMS
1.致癌基因的表達率增加579Please respect copyright.ＰＥＮＡＮＡLkdJibaEms
2.新陳代謝酶素變異579Please respect copyright.ＰＥＮＡＮＡWDjYSK7ISi
3.周遭環境缺乏氧氣579Please respect copyright.ＰＥＮＡＮＡ8aoiHbWt6k
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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。579Please respect copyright.ＰＥＮＡＮＡ1JNFDobZqY
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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。579Please respect copyright.ＰＥＮＡＮＡdSX8poILYk
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。579Please respect copyright.ＰＥＮＡＮＡd0IWicvZzT
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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。579Please respect copyright.ＰＥＮＡＮＡq7DL8LPfyL
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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。579Please respect copyright.ＰＥＮＡＮＡmSL3PRpstH
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。579Please respect copyright.ＰＥＮＡＮＡ5ysMF3Q88m
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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。579Please respect copyright.ＰＥＮＡＮＡ6whsWkHSq6
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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？579Please respect copyright.ＰＥＮＡＮＡAHw6Lcdkfd
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其中的一種渠道，就是從鄰近死去的細胞獲取。579Please respect copyright.ＰＥＮＡＮＡH3754Heci3
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詳見可閱：579Please respect copyright.ＰＥＮＡＮＡ3W462Wtx1m
三十秒科學–化療效果參差的其中一道原因579Please respect copyright.ＰＥＮＡＮＡV1tmbEIncf
- 分享自 LIHKG 討論區579Please respect copyright.ＰＥＮＡＮＡtzHvL8U2ra
https://lih.kg/2378848579Please respect copyright.ＰＥＮＡＮＡqTcPw6fww5
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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。579Please respect copyright.ＰＥＮＡＮＡZQI80XbiJ3
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。579Please respect copyright.ＰＥＮＡＮＡrK1NhGSZhG
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日復如此，腫瘤亦得以無止境助大。579Please respect copyright.ＰＥＮＡＮＡ3xJNfjLRWe
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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。579Please respect copyright.ＰＥＮＡＮＡpQ9K5k3EBt
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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/toc579Please respect copyright.ＰＥＮＡＮＡ758FgOG4tJ
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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。579Please respect copyright.ＰＥＮＡＮＡzid7GCNsOZ
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Link:579Please respect copyright.ＰＥＮＡＮＡHKE6LCub3L
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio579Please respect copyright.ＰＥＮＡＮＡ0vydZp92Uf
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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。579Please respect copyright.ＰＥＮＡＮＡBIAu6lQq1k
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