腸道是細菌們聚居體內的其中一道地方,而腸道細菌品種的變異,將有助大腸癌的形成。754Please respect copyright.PENANA3SlhPAXyNi754Please respect copyright.PENANANxW52Qrjyu
754Please respect copyright.PENANAIVdaF8U4Yu
(圖2)糞便含有腸道的細菌,透過糞便移植(其中一方法為從口中灌入),人類腸道的細菌亦因而能夠寄居到老鼠腸道中。754Please respect copyright.PENANAXcuF0sAOeN754Please respect copyright.PENANA66GQiMLNpU
754Please respect copyright.PENANAOIWbWU5SgP
就此,有科學家嘗試將健康人士及腸癌病人的糞便移植到老鼠腸道中,探索腸道細菌對大腸癌的影響(Ref1)。754Please respect copyright.PENANArM7mCp944x
754Please respect copyright.PENANAXOCTmTAwlH
(圖3)從圖中可見,莫論是健康還是腸癌人士糞便組別也好,普通老鼠均不會出現腸癌。754Please respect copyright.PENANAVKaHljzTGK754Please respect copyright.PENANAqK0nX6sFju
754Please respect copyright.PENANAYR1hjglGb9
但在天生容易生腸癌的老鼠中,移植腸癌人士糞便後所出現的腫瘤數量,明顯的比健康人士糞便組別為多。754Please respect copyright.PENANAfsAPBH1t6K
754Please respect copyright.PENANAj9SeZx94nI
(圖4)同時,移植腸癌人士糞便後所出現的腫瘤,體積亦明顯的比健康人士糞便組別為大。754Please respect copyright.PENANAhs47EBEiqQ754Please respect copyright.PENANAVzs0rYfcNn
754Please respect copyright.PENANAfaHgAxqgpO
而移植糞便後,兩組老鼠的腸道細菌品種亦有明顯分別。754Please respect copyright.PENANAdsqK3QLTY0
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(圖5)重要的是,腸癌人士糞便中的某幾隻脂肪酸數量,亦明顯比健康人士糞便組別為少。754Please respect copyright.PENANAqyADWyS4Ix
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依照現時的理論,人體有部份的腸道細菌乃依靠消化食用纖維維生。754Please respect copyright.PENANAcwTwETOBWB
754Please respect copyright.PENANA8eLM2pJySP
當人體長期沒有進食纖維的話,將會導致腸道細菌品種失衡,使進食脂肪酸的細菌品種助大。754Please respect copyright.PENANA6x7p5ZVnvp
754Please respect copyright.PENANAnuWfRsJ3u8
這亦有可能解釋得到,為何腸癌人士糞便中某數款脂肪酸的數量亦相對之為少。754Please respect copyright.PENANAdcZltUzx9d
754Please respect copyright.PENANAZRoHUcuF8k
基於腸道細菌品種與大腸癌的形成有著密切關係,有不少研究團隊亦開始研究如何透過檢測糞便的細菌品種來推算出大腸癌的出現機率,與內窺鏡檢查相輔相成。754Please respect copyright.PENANA5CqieM57Qb
754Please respect copyright.PENANAeTJ4ySfFh6
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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。754Please respect copyright.PENANAbLCZ2FwFJV
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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/toc754Please respect copyright.PENANA5BuMwBbVeW
754Please respect copyright.PENANA3ryPzzC5kJ
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。754Please respect copyright.PENANAo2NSxBbqAC
754Please respect copyright.PENANAh440Hvn9FK
Link:754Please respect copyright.PENANAc6a8pLgekF
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio754Please respect copyright.PENANAcqO9CztPw8
754Please respect copyright.PENANAtttkL1x8sr
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。754Please respect copyright.PENANA2pSBi5pt39
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https://www.instagram.com/potatopigtongue/754Please respect copyright.PENANAf1OhrmsHXl
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754Please respect copyright.PENANAgL77bjFiUh
Ref1:https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(19)30625-5/fulltext754Please respect copyright.PENANABalmSOOrWi
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科普專欄–薯不揀單
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薯仔聞茱莉

篇 #126
深入淺出–腸道細菌與大腸癌
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