科普專欄–薯不揀單 - 三十秒科學–身體細胞會否進行浪費舉動？

我們身體的細胞，會否作出多餘或者浪費的事情呢?505Please respect copyright.ＰＥＮＡＮＡZMmvJup5GR
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（圖2）超級簡化來說，我們細胞內含的粒線體能夠將我們所攝取的營養經由一系列的過程轉化成為ATP。505Please respect copyright.ＰＥＮＡＮＡ9DiE6CTEHH
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ATP能夠為細胞提供所需的能源，我們的手腳之所以可以伸縮自如，全賴身體肌肉細胞等耗用ATP才能達成。505Please respect copyright.ＰＥＮＡＮＡ8eGrHF85qc
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（圖3）而唯獨在專門製造熱能的啡色脂肪細胞粒線體裡頭，內裡有一隻名為CKB(Creatine Kinase B)的蛋白酶會迅速透過Creatine將大量的ATP立刻轉回為ADP以及Phosphocreatine；505Please respect copyright.ＰＥＮＡＮＡTwsgF3tCyl
肌肉細胞及白色脂肪細胞雖然也會進行這步驟，但效率遠遠低於啡色脂肪細胞。505Please respect copyright.ＰＥＮＡＮＡZkZDM2avET
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ADP並不是細胞通用的能量單位，辛辛苦苦將得來的ATP又轉回成為ADP，情形就如在中國大陸境內將辛苦得來的美金(ATP)轉換為人民幣(ADP)一樣，驟眼看起上來超級無謂及浪費。505Please respect copyright.ＰＥＮＡＮＡxUj1MOoydJ
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雖然細胞可以透過Phosphocreatine及ADP轉化成為ATP及Creatine，但在咖色脂肪細胞裡頭，這情況在大部分的時間也沒有發生，正如大陸境內沒法能夠兌換人民幣(ADP)為美金(ATP)一樣。505Please respect copyright.ＰＥＮＡＮＡ3DdHGXwnli
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理論上，身體細胞理應發展出一套非常完善的系統，不會做出多餘浪費的行為。505Please respect copyright.ＰＥＮＡＮＡsll4z0a5r5
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而現時開始有證據顯示，這「浪費行為」相信能夠輔助啡色脂肪將營養轉化成為熱能，而非能量的儲存。505Please respect copyright.ＰＥＮＡＮＡyhghfJEiVN
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若能夠完整地理解整個機制，或許可透過藥物影響肚腩（白色脂肪）的CKB蛋白酶含量，將肚腩脂肪逐一消耗成為熱能，達減肥之效。505Please respect copyright.ＰＥＮＡＮＡrjI1hzChNa
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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。505Please respect copyright.ＰＥＮＡＮＡJjdMzH2Nzg
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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/toc505Please respect copyright.ＰＥＮＡＮＡJnL6LpJnJo
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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。505Please respect copyright.ＰＥＮＡＮＡ6soIMChrza
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Link:505Please respect copyright.ＰＥＮＡＮＡ5LgbtqKTR9
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio505Please respect copyright.ＰＥＮＡＮＡ5imEgg6Gbl
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。505Please respect copyright.ＰＥＮＡＮＡ8MFZIZqghP
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Ref1:https://www.nature.com/articles/s41586-021-03221-y505Please respect copyright.ＰＥＮＡＮＡThQhienmXz

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