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)。333Please respect copyright.PENANAL3UdVD7JcJ
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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。333Please respect copyright.PENANAjOS7Ljasvh
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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。333Please respect copyright.PENANAj6CrtanBbd
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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。333Please respect copyright.PENANANrFGNruMPM
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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。333Please respect copyright.PENANA1qnam015xX
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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。333Please respect copyright.PENANAO5yuNdwenG
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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。333Please respect copyright.PENANAqzVkqPzWxw
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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。333Please respect copyright.PENANAg2gv01GOjc
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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。333Please respect copyright.PENANApN1q6qnv3x
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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。333Please respect copyright.PENANAJHoJyHWaLe
333Please respect copyright.PENANAjVsnrX4FLa
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/toc333Please respect copyright.PENANActwPdL6dfJ
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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。333Please respect copyright.PENANAn9t8mP7mLU
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Link:333Please respect copyright.PENANAT0Mpk0khtO
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio333Please respect copyright.PENANA57gC4CvJ1Z
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基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。333Please respect copyright.PENANAsvXfAmL7dH
333Please respect copyright.PENANAK8GQRKmHXC
Ref1:https://www.nature.com/articles/nature13528333Please respect copyright.PENANAZePEn6WF32
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科普專欄–薯不揀單
作者:
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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