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)。570Please respect copyright.PENANAQ7V11Ilj5L570Please respect copyright.PENANAgLohaFSAqd
570Please respect copyright.PENANA991aRFi5sV
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。570Please respect copyright.PENANAViF8Hp0oGT
570Please respect copyright.PENANAgs0bPcVqNK
(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。570Please respect copyright.PENANAz9xwHa642l570Please respect copyright.PENANAtlSfQgDJxl
570Please respect copyright.PENANAjt0fCwhlnT
570Please respect copyright.PENANAoDo0HhgsZJ
(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。570Please respect copyright.PENANAU3LE72dNFr570Please respect copyright.PENANAY1MGU21FC5
570Please respect copyright.PENANAZjrcQqBeSy
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。570Please respect copyright.PENANAr6WqeKXPAR
570Please respect copyright.PENANAIRY81OAIO5
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。570Please respect copyright.PENANAIwE66yuL9j
570Please respect copyright.PENANACfCKPKRkQr
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。570Please respect copyright.PENANAF4GAbn7qna
570Please respect copyright.PENANAyoopSgldy9
570Please respect copyright.PENANA6PgXXh9d2x
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。570Please respect copyright.PENANA6oPMOaHuYn
570Please respect copyright.PENANAi66vra350d
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。570Please respect copyright.PENANAx6DvdS3sau
570Please respect copyright.PENANAnHw2hJidUF
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。570Please respect copyright.PENANAPTjnApRyUq
570Please respect copyright.PENANAv8FYz3WCGD
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/toc570Please respect copyright.PENANAvtGB4pIN1Z
570Please respect copyright.PENANAY8URXa4d4A
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。570Please respect copyright.PENANAoY8p25lT8P
570Please respect copyright.PENANA8rXpMDxIHa
Link:570Please respect copyright.PENANAi5hxkECwHp
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio570Please respect copyright.PENANAPcszw1Daw7
570Please respect copyright.PENANADTJ0D2OTkN
570Please respect copyright.PENANAUT4tjCXoaK
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。570Please respect copyright.PENANAbIDnoFSUsz
570Please respect copyright.PENANAXm7E49fW5Q
Ref1:https://www.nature.com/articles/nature13528570Please respect copyright.PENANAwIrA9rNAhB
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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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