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)。347Please respect copyright.PENANAYK97G8ZRok347Please respect copyright.PENANADRcEFGzgAm
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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。347Please respect copyright.PENANAWLrSgEy0xL
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(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。347Please respect copyright.PENANABZWD2wC29N347Please respect copyright.PENANANbF0wfrWcZ
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(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。347Please respect copyright.PENANAPXdiI4fA04347Please respect copyright.PENANA7zlXvt33Oa
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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。347Please respect copyright.PENANAOUnEGGbbRp
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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。347Please respect copyright.PENANAAzIv5cNDxE
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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。347Please respect copyright.PENANA8SLu1JcPkZ
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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。347Please respect copyright.PENANAtv8TFJaYmL
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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。347Please respect copyright.PENANAflOcnwj4oQ
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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。347Please respect copyright.PENANAWoSLLf75rJ
347Please respect copyright.PENANA9ayQA7fuCI
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/toc347Please respect copyright.PENANAnoEvHZa9AV
347Please respect copyright.PENANAFIq3MwH7xw
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。347Please respect copyright.PENANA0lj990srU0
347Please respect copyright.PENANAp7VzrJBJKL
Link:347Please respect copyright.PENANAOWhSmdR0He
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio347Please respect copyright.PENANAbJkvL43RBW
347Please respect copyright.PENANAVbuqmcrXdH
347Please respect copyright.PENANA6rMmfmiMam
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。347Please respect copyright.PENANA0aw4b7Sbow
347Please respect copyright.PENANAW67bofe2Mj
Ref1:https://www.nature.com/articles/nature13528347Please respect copyright.PENANAATvuw7ah0C
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科普專欄–薯不揀單
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薯仔聞茱莉
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ISSUE #152
三十秒科學–癌症所導致的體重流失
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