科普專欄–薯不揀單 - 三十秒科學–粒線體分裂

粒線體在大部份的教科書裡均會被描繪成為橢圓形狀，然而這與事實是完全的背道而馳。571Please respect copyright.ＰＥＮＡＮＡcgQQh0NkDn
粒線體在細胞內並無固定形態，且經常會改變自身的形狀。571Please respect copyright.ＰＥＮＡＮＡyUQO1LOfHz
571Please respect copyright.ＰＥＮＡＮＡu9qhAZPhhE
571Please respect copyright.ＰＥＮＡＮＡT1VTMqrb55
571Please respect copyright.ＰＥＮＡＮＡTfK3mzCXvo
(圖2)圖中的鬼劃符並非是茶餐廳侍應生字體、亦不是醫生字體，而是粒線體的各種倩影。571Please respect copyright.ＰＥＮＡＮＡaifZvVilg9
571Please respect copyright.ＰＥＮＡＮＡxSLwr9uBtb
571Please respect copyright.ＰＥＮＡＮＡP6fPpUE9bO
由此可見得到粒線體的形象百變，絕非是普通的一個橢圓形這麼簡單。571Please respect copyright.ＰＥＮＡＮＡhpNgn3e2Sq
571Please respect copyright.ＰＥＮＡＮＡIuSE8zHfvu
另一點值得注意的是圖中的藍色三角型，它標示著粒線體即將一分為二的位置;571Please respect copyright.ＰＥＮＡＮＡTEMSBQKAvh
有一些處於中間位置，而有一些則位於界乎邊緣的位置。571Please respect copyright.ＰＥＮＡＮＡttktmYF268
571Please respect copyright.ＰＥＮＡＮＡONBhJc93uf
571Please respect copyright.ＰＥＮＡＮＡNjCEYGJ5Vs
(圖3)橙色框架為粒線體在邊緣位置一分為二，而綠色框架為粒線體在中間位置一分為二。571Please respect copyright.ＰＥＮＡＮＡCLMfV0hq1B
571Please respect copyright.ＰＥＮＡＮＡuqLfxPGdSB
571Please respect copyright.ＰＥＮＡＮＡE1SPEVYAlS
兩者的分別究竟是隨機所致，還是別有用心做成的呢?571Please respect copyright.ＰＥＮＡＮＡoVXNl9isnJ
571Please respect copyright.ＰＥＮＡＮＡDNwCfDeMDi
(圖4)經過一系列的研究發現，往中間分裂的粒線體為正常運作的粒線體，以一變二從而更有效率為細胞提供能源。571Please respect copyright.ＰＥＮＡＮＡdBDFXQSncm
571Please respect copyright.ＰＥＮＡＮＡlwDFP1DxJX
571Please respect copyright.ＰＥＮＡＮＡyO0vXzucvf
而朝邊緣分裂的粒線體大多是有問題的粒線體，這樣做的目的是提供訊號號令細胞殲滅自己，分解過程涉及名為lysosome的細胞器官，且被稱之為Mitophagy。571Please respect copyright.ＰＥＮＡＮＡzir2hsW48I
571Please respect copyright.ＰＥＮＡＮＡxPVKDKk73v
有不少證據顯示，若過量的粒線體分裂過程處理失當的話，便會引致神經衰退、心臟問題甚至是癌症等疾病，所以絕對不能看少。571Please respect copyright.ＰＥＮＡＮＡeTn0Wk2Don
571Please respect copyright.ＰＥＮＡＮＡgNklunLFGT
571Please respect copyright.ＰＥＮＡＮＡCht0fl9uUf
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。571Please respect copyright.ＰＥＮＡＮＡxhzBotTdRR
571Please respect copyright.ＰＥＮＡＮＡ2aXTc9Wl7L
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/toc571Please respect copyright.ＰＥＮＡＮＡEjvEk97Oqc
571Please respect copyright.ＰＥＮＡＮＡXBsIUCDRzG
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。571Please respect copyright.ＰＥＮＡＮＡoRT7Zn4Q3h
571Please respect copyright.ＰＥＮＡＮＡm8zS0KGEQz
Link:571Please respect copyright.ＰＥＮＡＮＡP7ZARTPeEQ
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio571Please respect copyright.ＰＥＮＡＮＡcAxggrazrl
571Please respect copyright.ＰＥＮＡＮＡ0zRJN62eoS
571Please respect copyright.ＰＥＮＡＮＡZHR6oNNoLm
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。571Please respect copyright.ＰＥＮＡＮＡ5vkJFBgZFu
571Please respect copyright.ＰＥＮＡＮＡSJDBB5ihz2
Ref1:https://www.nature.com/articles/s41586-021-03510-6.epdf?sharing_token=mzsmDs0ANdRBBQvInQMvvtRgN0jAjWel9jnR3ZoTv0OMD04Ej-fby18QAbbYG6vyeMOYV7CCtU3H37dLLVGMhZrbaWwtYnIpOFGd_LqSK3hdGqNlM7t6Rx3bnspU9DQ9gY6z-suKVBlosRUCiyfKgCZhfjCY5-MquoelNTFJO3k%3D