不少的癌症病人均會出現體重及BMI急速下降的情況,肌肉會出現萎縮,脂肪組織亦有機會有所消耗,這現象稱之為Cancer-associated cachexia(CAC)。547Please respect copyright.PENANAqzj2G5e4e0547Please respect copyright.PENANAAhNEy9lsz5
547Please respect copyright.PENANAHoMlJKcqZJ
與厭食症不同的是,體重的流失並沒能依靠增加進食來進行完全填補。547Please respect copyright.PENANAbn5MckL3az
547Please respect copyright.PENANACbEqiL9aXb
(圖2)CAC的形成,是腫瘤與身體多種器官互動後所得出的結果,箇中涉及新陳代謝及荷爾蒙的轉變。547Please respect copyright.PENANAN1UmU3ByRa547Please respect copyright.PENANA68AcFxyExi
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547Please respect copyright.PENANA4VTLdfEg4e
(圖3)從圖中所見,老鼠出現腫瘤約21日後,腿部肌肉出現萎縮,與人類的CAC現象吻合。547Please respect copyright.PENANARxSZl4JfCk547Please respect copyright.PENANAv4YN6TDJxk
547Please respect copyright.PENANAucC2dz0iUw
PTHrP是一種某類型的腫瘤釋放到血管的蛋白質,而往老鼠注射PTHrP蛋白質抗體的話,肌肉的萎縮程度亦有所緩和。547Please respect copyright.PENANA8U7mJxBlji
547Please respect copyright.PENANAWbM0OUrLL7
只可是,往健康老鼠注射PTHrP蛋白質的話,肌肉並不會貿然萎縮,而往出現腫瘤的老鼠注射PTHrP蛋白質的話,肌肉萎縮的程度反會更加劇烈。547Please respect copyright.PENANAc5yvvGK5W2
547Please respect copyright.PENANA2GvLX369uC
這亦證明,PTHrP蛋白質只是導致癌症時候肌肉萎縮的其中一道組件,還需要癌細胞另外的付出才可達成。547Please respect copyright.PENANA9p0k54b9Ip
547Please respect copyright.PENANAimP2cjLdED
547Please respect copyright.PENANA6BNNv9iXk5
癌症所帶來的CAC現象,會導致藥物對其他正常器官出現更強烈的副作用及毒性。這變相需要降低用藥的劑量作出配合,因而減低了滅癌的效率。547Please respect copyright.PENANAiV5xYbgEAz
547Please respect copyright.PENANAAwRMQwBOPI
因此,現今科學家亦在努力嘗試找出CAC的整套機制,務求找出有效的醫學方法制止CAC的產生。547Please respect copyright.PENANAzxs1zKkpwE
547Please respect copyright.PENANAQ7rWWIUWbR
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。547Please respect copyright.PENANALVhX41PuZR
547Please respect copyright.PENANADs5OIBAVk3
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/toc547Please respect copyright.PENANARMxohu31b9
547Please respect copyright.PENANAUnmaqKd0ih
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。547Please respect copyright.PENANAw9KAMJqaNp
547Please respect copyright.PENANAPj9M3sv7i9
Link:547Please respect copyright.PENANAZWfR6n0ryt
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio547Please respect copyright.PENANAnFxut9G6bc
547Please respect copyright.PENANAmyHJfkKkQJ
547Please respect copyright.PENANALc81PQr9SE
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。547Please respect copyright.PENANAztvAbhSZBJ
547Please respect copyright.PENANAJTPqJh5oot
Ref1:https://www.nature.com/articles/nature13528547Please respect copyright.PENANAumxqkflkY3
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科普專欄–薯不揀單
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薯仔聞茱莉

篇 #152
三十秒科學–癌症所導致的體重流失
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