癌細胞從原處走到另一地方(轉移,Metastasis),均需透過血液或淋巴系統作交通渠道。373Please respect copyright.PENANAXpZiBBi7mQ
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有不少癌細胞轉移到另一器官後會呈「休養」狀態,不迅速繁殖,而是長期潛伏在另一器官內。373Please respect copyright.PENANAU6356Pe7NO
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因此就算沒能檢測得到循環腫瘤細胞的存在,也不百分百等於未來不會出現癌細胞轉移事件。373Please respect copyright.PENANAVvVOu7vkI2
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(圖2)科學家分別把人類及老鼠的癌細胞注入到老鼠模型作研究,發現癌細胞發生轉移的機率是與目的地所含的NK cell數量有關係。373Please respect copyright.PENANAtzLv7mBnAT
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目的地所含的NK cell越多,該地方出現癌細胞轉移的機率亦會越低。373Please respect copyright.PENANAPtSZt8HHqc
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之所以會出現這情況,除了是NK cell殺死癌細胞這可能性之外,科學家發現NK cell會釋放interferon-γ (IFN-γ)的物質,誘使癌細胞進入休養狀態,不進行自我繁殖。373Please respect copyright.PENANAPm1KIwHBVf
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(圖3)奈何,至少在肝臟裡頭,一種名為Hepatic stellate cells會釋出CXCL12物質,CXCL12會阻礙NK cell的生長速度。373Please respect copyright.PENANAGKXKOePAPT
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久而久之,便再也沒有足夠的NK cell抑制癌細胞的生長,而當潛伏在另一器官的癌細胞快速繁殖之時,這亦是轉移(Metastasis)被鑑定發生之時。373Please respect copyright.PENANAXCjpRncPKV
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對此,研發藥物或療程確保NK cell長期處於足夠水平,或許是一道避免癌細胞發生轉移的大方向。373Please respect copyright.PENANA2PuJlmosu7
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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。373Please respect copyright.PENANA2BK4pX1dHf
373Please respect copyright.PENANAorTzMAhYlX
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/toc373Please respect copyright.PENANAn6UJm4ZL0f
373Please respect copyright.PENANADz9659HamB
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。373Please respect copyright.PENANADF4tFEhAxX
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Link:373Please respect copyright.PENANAa78CLGhkkb
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio373Please respect copyright.PENANAQ3YiaGCrta
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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。373Please respect copyright.PENANAnBSZYMSGJ5
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Ref1:https://www.nature.com/articles/s41586-021-03614-z373Please respect copyright.PENANAhcpnqkV4pE
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #242
三十秒科學–潛伏在另一器官的癌細胞
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