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)。425Please respect copyright.PENANAAp2xII9rLu
425Please respect copyright.PENANAqYlIpTl6tP
425Please respect copyright.PENANAlCKPH5cB6t
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。425Please respect copyright.PENANAXUqrURRbDo
425Please respect copyright.PENANA8egaTPa8Me
(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。425Please respect copyright.PENANAvcJZncEpkR
425Please respect copyright.PENANAfl3bMukfFO
425Please respect copyright.PENANAie7Cizwpkj
425Please respect copyright.PENANAMo4j5VutMS
(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。425Please respect copyright.PENANAhHq2z83jrf
425Please respect copyright.PENANAz8tPAbpJlU
425Please respect copyright.PENANADxI2spDIoF
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。425Please respect copyright.PENANAdUCTwDdTnd
425Please respect copyright.PENANAG52A14i7u8
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。425Please respect copyright.PENANApEHWOdbZJb
425Please respect copyright.PENANAS4DxiN9eaH
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。425Please respect copyright.PENANAyBuFzLwELV
425Please respect copyright.PENANAHesNHvBVKK
425Please respect copyright.PENANAG6aOne9wfg
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。425Please respect copyright.PENANAi5C2Z8ccWp
425Please respect copyright.PENANAhEcEI0XA44
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。425Please respect copyright.PENANAVbhXINTjvg
425Please respect copyright.PENANA6YqAnkZuLg
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。425Please respect copyright.PENANA6wkvt0sBp5
425Please respect copyright.PENANAXq9WmrvWtd
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/toc425Please respect copyright.PENANAis1VKjOthk
425Please respect copyright.PENANA4qDtxGBr4q
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。425Please respect copyright.PENANAv56349I4jc
425Please respect copyright.PENANABlP7kB0dYS
Link:425Please respect copyright.PENANAPY2rpIHehX
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio425Please respect copyright.PENANA5K5x5xROCH
425Please respect copyright.PENANA3JmlKB80eh
425Please respect copyright.PENANAzuM3ZTmIXz
基於WhatsApp/Facebook等問題,IG將不會再作更新,只會寄居本土LIHKG及Penana。425Please respect copyright.PENANAqX82sOWRrP
425Please respect copyright.PENANAhh3YMzFEX0
Ref1:https://www.nature.com/articles/nature13528425Please respect copyright.PENANA87utJwE4A8