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。248Please respect copyright.PENANAUt5dCaCyTV
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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。248Please respect copyright.PENANAEImOPwLFnk
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?248Please respect copyright.PENANAMT3VQ36Gf0
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(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。248Please respect copyright.PENANAEql146i2Gh
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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。248Please respect copyright.PENANAu3S6ZkLbzP
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遺憾的是,結果非常參差,整體成效並不理想。248Please respect copyright.PENANAh4p4mzKQcl
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(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。248Please respect copyright.PENANAi5IzJ80oHC
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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。248Please respect copyright.PENANAt1b8fufEhU
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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。248Please respect copyright.PENANAdkXDQvnSkw
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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。248Please respect copyright.PENANAWl9gE0HlfD
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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。248Please respect copyright.PENANA3kqTV7oH0F
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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。248Please respect copyright.PENANA6ltbckuX59
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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。248Please respect copyright.PENANAd3DkJHBlqX
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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。248Please respect copyright.PENANA8s4YAiKc9r
248Please respect copyright.PENANA7O3CxAavFe
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/toc248Please respect copyright.PENANAbKMkpsit03
248Please respect copyright.PENANA0wocj4TkYA
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。248Please respect copyright.PENANAym1pqKbLfo
248Please respect copyright.PENANARaUREf1Q1u
Link:248Please respect copyright.PENANAuTnbRxoIrL
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio248Please respect copyright.PENANAgzMrByWbXC
248Please respect copyright.PENANA3C3kYRI7YY
248Please respect copyright.PENANAz9hsI8iMl5
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。248Please respect copyright.PENANAgUekO7q8FS
248Please respect copyright.PENANAUOF6PkWf5a
Ref1:https://www.nature.com/articles/s41586-018-0343-4248Please respect copyright.PENANABDTqnVUSCC
Ref2:https://science.sciencemag.org/content/372/6537/20248Please respect copyright.PENANABN8n4VjyzG
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
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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