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。624Please respect copyright.PENANATjOMEyO8VS624Please respect copyright.PENANAt5NgBkLNgj
624Please respect copyright.PENANAljAl8dGubF
箇中的原因至少有三:624Please respect copyright.PENANABkedv4EXNx
1.致癌基因的表達率增加624Please respect copyright.PENANA4uaoAOTjgG
2.新陳代謝酶素變異624Please respect copyright.PENANAVrGigoeE9L
3.周遭環境缺乏氧氣624Please respect copyright.PENANAV8XP3VgAxE
624Please respect copyright.PENANApzW7V1CzsO
(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。624Please respect copyright.PENANAC9UAO74BaY624Please respect copyright.PENANAYmGC4ryidb
624Please respect copyright.PENANAHBB8czp3ZK
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。624Please respect copyright.PENANA62q7SLkl0M
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。624Please respect copyright.PENANADvPwcC4q1Z
624Please respect copyright.PENANAJGtZlg3IXf
(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。624Please respect copyright.PENANA1YMpWSQtGt624Please respect copyright.PENANANEFsm3GhgV
624Please respect copyright.PENANAOqQDkhufL6
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。624Please respect copyright.PENANAnu3dk6EzwH
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。624Please respect copyright.PENANAdU6nQnXeHU
624Please respect copyright.PENANAEYHDuOE6gS
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。624Please respect copyright.PENANA8THqIlymdW
624Please respect copyright.PENANAY8NPGehoJh
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?624Please respect copyright.PENANAEGEGVoCAcD
624Please respect copyright.PENANAABChKNaOtM
其中的一種渠道,就是從鄰近死去的細胞獲取。624Please respect copyright.PENANAmQIcODfYoL
624Please respect copyright.PENANAL2Lg3ztoAW
詳見可閱:624Please respect copyright.PENANAWpM6DKfO1r
三十秒科學–化療效果參差的其中一道原因624Please respect copyright.PENANAMOkSL06vgn
- 分享自 LIHKG 討論區624Please respect copyright.PENANATzsxbTQsB8
https://lih.kg/2378848624Please respect copyright.PENANAayj4CTP6WB
624Please respect copyright.PENANAdtdxgRjm62
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。624Please respect copyright.PENANAUdlwF4QX5y
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。624Please respect copyright.PENANAZDrhzd9eng
624Please respect copyright.PENANA7i9kLj10rN
日復如此,腫瘤亦得以無止境助大。624Please respect copyright.PENANAa8i612a2KI
624Please respect copyright.PENANAkrKvPpmpAy
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。624Please respect copyright.PENANACEgAEsLmn3
624Please respect copyright.PENANAH8XPB1r6EF
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/toc624Please respect copyright.PENANAl4a02Hnadu
624Please respect copyright.PENANAWCachYpCJk
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。624Please respect copyright.PENANAZkq15Xhgl8
624Please respect copyright.PENANANv1Me3OwFr
Link:624Please respect copyright.PENANARAFV95qgRN
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio624Please respect copyright.PENANAoI4xwZFrQE
624Please respect copyright.PENANA2qTxarFAH0
624Please respect copyright.PENANA6w1SBGuXLd
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。624Please respect copyright.PENANAfozcL2afb8
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #162
三十秒科學–癌細胞嗜糖的原因
喜歡 1
閱讀 620
書籤 150
campaign
催更 0
打賞

按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人