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)。568Please respect copyright.PENANAZxN7MHQLab568Please respect copyright.PENANA9OTQYZPYRN
568Please respect copyright.PENANAQxM8dKCqAY
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。568Please respect copyright.PENANAeFAjaX9uwz
568Please respect copyright.PENANA2vR3W0Jnfd
(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。568Please respect copyright.PENANAdVhdneLMDp568Please respect copyright.PENANAWACQFEaESl
568Please respect copyright.PENANAsrCBeBqlXI
568Please respect copyright.PENANANX5LREMT26
(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。568Please respect copyright.PENANAdmRbcYAsNB568Please respect copyright.PENANAeo6dXvjyQ1
568Please respect copyright.PENANAmTcvs1Z9UL
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。568Please respect copyright.PENANAY70olm3SLz
568Please respect copyright.PENANAA8wjb88Dt9
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。568Please respect copyright.PENANA0VTXd24LNd
568Please respect copyright.PENANAmYnjS3TlFC
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。568Please respect copyright.PENANAfpEwyjuPdK
568Please respect copyright.PENANAROZs7jp082
568Please respect copyright.PENANAJkoFSBPTSV
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。568Please respect copyright.PENANAgrXUpnAanN
568Please respect copyright.PENANAh08UpOMcub
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。568Please respect copyright.PENANAMPTyorYkt6
568Please respect copyright.PENANALysqGb25Eh
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。568Please respect copyright.PENANAkFM3R4TpRD
568Please respect copyright.PENANAbHzad0U5Xp
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/toc568Please respect copyright.PENANA3NNiw7ECOc
568Please respect copyright.PENANApf02Ety24X
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。568Please respect copyright.PENANAzF2LPYmUEI
568Please respect copyright.PENANA6tXvMJaNl6
Link:568Please respect copyright.PENANANfMFA5VV07
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio568Please respect copyright.PENANAmeLdNQCUyW
568Please respect copyright.PENANAehx25g3c4u
568Please respect copyright.PENANAVxLlmuxJuX
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。568Please respect copyright.PENANAFGrh72mz3K
568Please respect copyright.PENANApbriqqhteg
Ref1:https://www.nature.com/articles/nature13528568Please respect copyright.PENANABZbYzrPeEv
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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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