癌細胞從原位轉移到另一器官,亦即是Metastasis,是癌病患者主要的死因。277Please respect copyright.PENANA4dcZfjdaQ6
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「有趣的是」,癌細胞雖近乎不會轉移到肌肉位置裡頭,但卻能從遠處釋放物質,經由血管抵達肌肉位置,催使肌肉萎縮,亦即是癌症惡病質(cancer cachexia)。277Please respect copyright.PENANATbpJKVm7Pu
277Please respect copyright.PENANANQD1Kh0Iwn
(圖2)肌肉萎縮不但之令病人變得虛弱,難以接近正常劑量的化療,更為致命的是,當心臟肌肉及橫隔膜肌肉亦遭受到萎縮的時候,病人便會因呼吸困難等問題而逝死。277Please respect copyright.PENANAGpAM7gFukt
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早在1858年已有科學家指出cancer cachexia的存在,但至今2021年仍是沒有FDA認可藥物治療cancer cachexia。277Please respect copyright.PENANAfPnOf6NRZ5
277Please respect copyright.PENANAbZVk7T0yT3
(圖3)現時有不少臨床研究希望可以制衡cancer cachexia,普遍均是從營養方面入手。277Please respect copyright.PENANA91SSQbwLu4
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但結果大多數是只能夠增加病人的脂肪組織,而沒能夠填補已萎縮的肌肉。277Please respect copyright.PENANAfMPA4cfvMF
277Please respect copyright.PENANAwC9upSjPfg
有一點值得注意的是,肌肉細胞並非是死去,純粹是其分解蛋白質的進程比生產蛋白質的進程來得更快,因而形成萎縮。277Please respect copyright.PENANAwzJtHNfXhb
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(圖4)從研究Cancer cachexia的老鼠模型中可以看到,患癌的老鼠不但更為細小,其手腕的握力度亦有所下降。277Please respect copyright.PENANAORiauE5IY1
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觀察肌肉細胞橫切面的面積時,亦可以看到肌肉細胞的面積明顯有所縮細。277Please respect copyright.PENANA5UhLjkWkzX
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下集將會講解Cancer cachexia的老鼠模型所得出的其中一道結果。277Please respect copyright.PENANAJOtx3Wkvvd
277Please respect copyright.PENANAS6GCRNzflH
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。277Please respect copyright.PENANAZzewtDC87f
277Please respect copyright.PENANAVbbgm8WMep
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/toc277Please respect copyright.PENANA0odmuyyQAr
277Please respect copyright.PENANAt9ipzZXubW
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。277Please respect copyright.PENANAnryQbdu7jl
277Please respect copyright.PENANAh0xv8rkXYN
Link:277Please respect copyright.PENANAS2UwSCbpgp
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio277Please respect copyright.PENANADvl6nW7YeS
277Please respect copyright.PENANAsstYKlBpHa
277Please respect copyright.PENANAel0jrFcdto
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。277Please respect copyright.PENANArWOdsgIp3y
277Please respect copyright.PENANAEx1J66mQt9
Ref1:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6015555/277Please respect copyright.PENANAUzGpG0KFiW
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #202
三十秒科學–癌症所導致的體重流失(3)
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