癌細胞跟正常細胞一樣,就算處於停止生長的狀態,均需攝取營養維持細胞運作。264Please respect copyright.PENANAzBFbkPqoFE264Please respect copyright.PENANAPzn4qhxYaR
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在這個基礎下,有不少主張提倡以生酮飲食(Ketogenic Diet)作為醫治癌症的輔助療法。264Please respect copyright.PENANARRQ8sNFlgX
究竟這是「武肺乃由5G網路而起」之流,還是有其實質科學實據支持呢?264Please respect copyright.PENANA456UltaxSx
264Please respect copyright.PENANAH0y5In1jcs
(圖2)有不少的癌細胞均出現與PI3K蛋白質有關的變異,促使到它們具備更強大的快速繁殖及抵禦進行自我滅亡機制特性。264Please respect copyright.PENANAtLqU7IQjGV264Please respect copyright.PENANADzrHeWcwRf
264Please respect copyright.PENANANJ59rR40N5
有見及此,科學家們攜手合作,研發出藥物針對已變異的PI3K蛋白質,並在2010年其間進行大量的人類臨床研究,對相應的癌症病人下藥。264Please respect copyright.PENANAsQ3pUx2kEa
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遺憾的是,結果非常參差,整體成效並不理想。264Please respect copyright.PENANArEC5Ynw3w5
264Please respect copyright.PENANAUYkcM4zvbe
(圖3)深入探討為何會失敗後,科學家發現藥物對人體產生了一道副作用,就是誘使肝臟產生糖份,使血糖上升。264Please respect copyright.PENANAmCPTJdPSfu264Please respect copyright.PENANAsxgCuXiqHX
264Please respect copyright.PENANASClVjNqPCD
胰臟因著血糖的上升而產生胰島素,而非常諷刺的是,胰島素是激勵PI3K蛋白質的物質。264Please respect copyright.PENANAPxlaVCz5zu
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亦即是說,藥物副作用所產生的胰島素,抵消了藥物本來抑制PI3K的功用。264Please respect copyright.PENANAo5xbFqfrGB
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(圖4)基於生酮飲食能夠消耗肝臟的糖原,以及維持血液低胰島素水平,科學家嘗試利用生酮飲食來制衡藥物的副作用,並在老鼠模型上取得非常可觀的成果。264Please respect copyright.PENANAd8ZAq4j0aU264Please respect copyright.PENANAXZc6RbWgND
264Please respect copyright.PENANAqTCRp7AUbp
現在即將進行子宮內壁膜癌症患者的臨床測試,以生酮飲食再配上PI3K藥物,希望能夠取得理想的成果。264Please respect copyright.PENANAKJiWyxccPK
264Please respect copyright.PENANAdP0vhlQMF7
但有一點要注意的是,在某類型血癌及腦癌個案,生酮飲食反之然會鼓吹癌細胞加速生長,這很有可能是因為是某類別的癌細胞特別傾向吸收脂肪或酮體。264Please respect copyright.PENANAB2Y6ydPRLr
264Please respect copyright.PENANAq4d0D7eF50
換句話說,在尚未摸透自身所患的癌細胞其新陳代謝特性之前,胡亂採取生酮飲食將有機會引來反效果,間接為癌細胞提供有利生長的環境。264Please respect copyright.PENANAa7yYvT0Isv
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264Please respect copyright.PENANAgT6gHynzKV
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。264Please respect copyright.PENANAwBzfLVR4K6
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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/toc264Please respect copyright.PENANAbmPFlTCiJI
264Please respect copyright.PENANAwHJ5VHIGE1
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。264Please respect copyright.PENANAlEKIxDl0pj
264Please respect copyright.PENANAZXgad1N1dz
Link:264Please respect copyright.PENANA5RZh8epXs0
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio264Please respect copyright.PENANAUHNbucUoDN
264Please respect copyright.PENANAymaMgKFtTF
264Please respect copyright.PENANAHn8gxk0kgq
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。264Please respect copyright.PENANABzchOY87zy
264Please respect copyright.PENANAsClQr8m7Xe
Ref1:https://www.nature.com/articles/s41586-018-0343-4264Please respect copyright.PENANAIYhWYoOIL5
Ref2:https://science.sciencemag.org/content/372/6537/20264Please respect copyright.PENANAusZQ7Z1yBb
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科普專欄–薯不揀單
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薯仔聞茱莉
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ISSUE #196
三十秒科學–談生酮飲食作癌症輔助治療的可行性
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