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。343Please respect copyright.PENANARojFQC0lws
343Please respect copyright.PENANA8imslnK1WK
343Please respect copyright.PENANAeVR6PyPxBw
(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。343Please respect copyright.PENANATmGqEG7KO3
343Please respect copyright.PENANAqKh7aR94xP
343Please respect copyright.PENANAFz1d6C8pSR
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。343Please respect copyright.PENANACnmOn9FnDt
343Please respect copyright.PENANAd2G0GOdpHw
343Please respect copyright.PENANA6m0FaPyusf
(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。343Please respect copyright.PENANAPFqx2hWQG9
343Please respect copyright.PENANAEulk7ZIigW
343Please respect copyright.PENANA4TNrRtHQfY
而當到達catagen的時候,毛髮便會停止生長,但依舊維持原位。343Please respect copyright.PENANAdCsvD4j3h6
343Please respect copyright.PENANAIHidbiSku7
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。343Please respect copyright.PENANAlHHVJb9VNE
343Please respect copyright.PENANA4X8Rl7kOwG
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。343Please respect copyright.PENANAsR5q63Wh9A
343Please respect copyright.PENANAYbgmGS7RM3
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。343Please respect copyright.PENANACoAjtdA2fY
343Please respect copyright.PENANAMWnVqqL85j
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。343Please respect copyright.PENANAHyfFj6dyzt
343Please respect copyright.PENANAXOWZ8msCoQ
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。343Please respect copyright.PENANAyyYAxMSlKc
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343Please respect copyright.PENANAtRtcqaFvW5
343Please respect copyright.PENANAMMCt32VSOT
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。343Please respect copyright.PENANAUFQB4Ct6WY
343Please respect copyright.PENANA2LCi3462Od
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/toc343Please respect copyright.PENANAUDZi9CeGfz
343Please respect copyright.PENANAUsUGbEC63C
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。343Please respect copyright.PENANAYbXmNNt9mf
343Please respect copyright.PENANAgzX4nBOjwk
Link:343Please respect copyright.PENANAz5Bfk43omw
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio343Please respect copyright.PENANAZ2N9UqrWL6
343Please respect copyright.PENANAojSeKiHicB
343Please respect copyright.PENANAhSDsxKc3tD
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。343Please respect copyright.PENANAfEX8aGAVEC
343Please respect copyright.PENANAQmgDjGWoVV
Ref1:https://pubmed.ncbi.nlm.nih.gov/26763421/343Please respect copyright.PENANARGhft7E7cD
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科普專欄–薯不揀單
作者:
薯仔聞茱莉
篇 #198
三十秒科學–頭髮幹細胞的三個階段
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