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。361Please respect copyright.PENANArzDyqvVQcP361Please respect copyright.PENANAGUxW2oNXvb
361Please respect copyright.PENANA4nEessruSz
(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。361Please respect copyright.PENANA7L1XwJf4EA361Please respect copyright.PENANA3RqNwKp5J1
361Please respect copyright.PENANAH1z3PZFXGv
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。361Please respect copyright.PENANAEwgSstBf2G
361Please respect copyright.PENANAANHt3Rpkuv
361Please respect copyright.PENANAQ1w85WRVYk
(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。361Please respect copyright.PENANA95L6DvVs1G361Please respect copyright.PENANAdYO2lgXHYG
361Please respect copyright.PENANAHFV7MJ1df7
而當到達catagen的時候,毛髮便會停止生長,但依舊維持原位。361Please respect copyright.PENANA53y3vRZwdb
361Please respect copyright.PENANASTQUPWAzBW
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。361Please respect copyright.PENANATafDUWLHoq
361Please respect copyright.PENANAb9AHtOq63V
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。361Please respect copyright.PENANAzJK1Ug70Wc
361Please respect copyright.PENANAoZCiaxqV33
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。361Please respect copyright.PENANAo94qOOtqnJ
361Please respect copyright.PENANAL5M3gQ6zdz
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。361Please respect copyright.PENANAZBpZRFhENi
361Please respect copyright.PENANABZNY7X6CcW
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。361Please respect copyright.PENANAKFblTX5Zne
361Please respect copyright.PENANAhTsBpTAFt4
361Please respect copyright.PENANAqbFNcaUNLV
361Please respect copyright.PENANAvP8Osg3oeK
361Please respect copyright.PENANAZy1iGHE4VI
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。361Please respect copyright.PENANAWgwnUToXYN
361Please respect copyright.PENANAntnn2zeR6j
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/toc361Please respect copyright.PENANAOv1kBLGGjv
361Please respect copyright.PENANAZSMgNvXZS3
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。361Please respect copyright.PENANA4nyiWs3uYk
361Please respect copyright.PENANAHsQzuAMtRp
Link:361Please respect copyright.PENANAinXYX9UtXb
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio361Please respect copyright.PENANAdpGBqS6vsN
361Please respect copyright.PENANAhQGtx9ee55
361Please respect copyright.PENANAutHDQv1ORr
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。361Please respect copyright.PENANAdhbDOZ22ZN
361Please respect copyright.PENANAbUD44pIYCi
Ref1:https://pubmed.ncbi.nlm.nih.gov/26763421/361Please respect copyright.PENANAEHCdhxvuX0
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科普專欄–薯不揀單
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薯仔聞茱莉
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ISSUE #198
三十秒科學–頭髮幹細胞的三個階段
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