科普專欄–薯不揀單 - 三十秒科學–頭髮幹細胞的三個階段

頭髮一直也是不少人所關注的議題，而頭髮的生長，實情跟幹細胞(Stem cell)息息相關。566Please respect copyright.ＰＥＮＡＮＡGFtQqfXnXM
566Please respect copyright.ＰＥＮＡＮＡRWvWdV9W30
566Please respect copyright.ＰＥＮＡＮＡfZJYGEXrFV
（圖2）頭髮的生長，是由位於髮囊底部名為hair-follicle stem cells (HFSCs)的幹細胞產生出來。566Please respect copyright.ＰＥＮＡＮＡAVXAwWTDSl
566Please respect copyright.ＰＥＮＡＮＡYv3MHeRJtE
566Please respect copyright.ＰＥＮＡＮＡPJNigKogne
這些幹細胞會不斷地進行三個階段的循環，分別為anagen、catagen以及telogen。566Please respect copyright.ＰＥＮＡＮＡTwWhvA7NSz
566Please respect copyright.ＰＥＮＡＮＡ6sLUX1snNH
566Please respect copyright.ＰＥＮＡＮＡZe8K7N8s0F
（圖3）當anagen發生的時候，HFSCs幹細胞就會開始進行自我複製，經一系列的程序後便會導致毛髮生長;這階段可持續進行數年。566Please respect copyright.ＰＥＮＡＮＡMjPwJCFyQC
566Please respect copyright.ＰＥＮＡＮＡWxnVCfC3c7
566Please respect copyright.ＰＥＮＡＮＡEu9m2f1RTk
而當到達catagen的時候，毛髮便會停止生長，但依舊維持原位。566Please respect copyright.ＰＥＮＡＮＡ11CBU3HOZu
566Please respect copyright.ＰＥＮＡＮＡYdS6Qm0ZVv
之後便會進入telogan階段， HFSCs幹細胞進入「冬眠」狀態，不作任何複製舉動，而毛髮亦會因而自然地脫落。566Please respect copyright.ＰＥＮＡＮＡTtvSCxfR4A
566Please respect copyright.ＰＥＮＡＮＡWfOCYHhJnK
落入telogan階段後，幹細胞便會再度進入anagen階段，重新開始產生毛髮。566Please respect copyright.ＰＥＮＡＮＡJIhrF0ovWf
566Please respect copyright.ＰＥＮＡＮＡjgz7u5F12c
健康人士的HFSCs幹細胞，高達80-90%處於anagen，10-20%處於catagan，只有1-5%處於telogan階段。566Please respect copyright.ＰＥＮＡＮＡwy7fL3JIQq
566Please respect copyright.ＰＥＮＡＮＡhGHSt87nBE
由此可以推想出，脫髮或者禿頭的原因就是大多數的HFSCs處於catagan或telogan階段，並不再重返anagen階段。566Please respect copyright.ＰＥＮＡＮＡTV8LRdFWow
566Please respect copyright.ＰＥＮＡＮＡfakoDfZ1gp
下集將會講解為何壓力過大會導致脫髮，箇中的原理涉及荷爾蒙的改變，及幹細胞三階段的失衡。566Please respect copyright.ＰＥＮＡＮＡH4cvar4tKi
566Please respect copyright.ＰＥＮＡＮＡpErKZ5xt3m
566Please respect copyright.ＰＥＮＡＮＡC36WrVTboG
566Please respect copyright.ＰＥＮＡＮＡSbyKC9QW05
566Please respect copyright.ＰＥＮＡＮＡ3dAqPZ1HhG
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。566Please respect copyright.ＰＥＮＡＮＡcaINyKLVdc
566Please respect copyright.ＰＥＮＡＮＡKJtWbC6vHH
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/toc566Please respect copyright.ＰＥＮＡＮＡkAyoTQHCNL
566Please respect copyright.ＰＥＮＡＮＡkGm7PxaqeH
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。566Please respect copyright.ＰＥＮＡＮＡpNdrQI3Qy0
566Please respect copyright.ＰＥＮＡＮＡHaxa3k9qdl
Link:566Please respect copyright.ＰＥＮＡＮＡRGzmCPdhqc
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio566Please respect copyright.ＰＥＮＡＮＡP1LvMeTs08
566Please respect copyright.ＰＥＮＡＮＡqfr5ti6rxj
566Please respect copyright.ＰＥＮＡＮＡoUAXkfiDeM
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。566Please respect copyright.ＰＥＮＡＮＡhLSsTaw4bn
566Please respect copyright.ＰＥＮＡＮＡ02bOqFkcfs
Ref1:https://pubmed.ncbi.nlm.nih.gov/26763421/566Please respect copyright.ＰＥＮＡＮＡkaBrszSzQI

ns216.73.216.246da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章