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。365Please respect copyright.PENANATrnbLcujlQ365Please respect copyright.PENANAI6bsYy5SN2
365Please respect copyright.PENANAbxcdCq9whU
(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。365Please respect copyright.PENANAjTG3guYSzA365Please respect copyright.PENANA4DARBZEqOt
365Please respect copyright.PENANAJ62fNH0GVn
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。365Please respect copyright.PENANAgKLhZOAizY
365Please respect copyright.PENANAqypZ4eEHHl
365Please respect copyright.PENANAZsUb0oBdP8
(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。365Please respect copyright.PENANAPx75hFcV1Y365Please respect copyright.PENANApSTuziYp0o
365Please respect copyright.PENANAQ8ha6DDVa6
而當到達catagen的時候,毛髮便會停止生長,但依舊維持原位。365Please respect copyright.PENANAtWMkdMOTZN
365Please respect copyright.PENANAez4b1fjwk2
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。365Please respect copyright.PENANAksbb4qYhLK
365Please respect copyright.PENANAJZov2RdWs7
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。365Please respect copyright.PENANACfzSBP4DBR
365Please respect copyright.PENANAUWYDth71N1
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。365Please respect copyright.PENANAaGyPUXrlPW
365Please respect copyright.PENANAga6FfWHn71
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。365Please respect copyright.PENANA3pcxlZNBj8
365Please respect copyright.PENANABenPSY0TBB
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。365Please respect copyright.PENANAPXHsuOgAuE
365Please respect copyright.PENANAS7DLLaJAoo
365Please respect copyright.PENANA7eG066oIjz
365Please respect copyright.PENANAFMELbCu7Qy
365Please respect copyright.PENANA9tfcFD6P28
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。365Please respect copyright.PENANAWxF6jwUv6s
365Please respect copyright.PENANAhGWMT3o4pW
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/toc365Please respect copyright.PENANAdPyWmEdEa7
365Please respect copyright.PENANAOQeAJCeAkN
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。365Please respect copyright.PENANA54Rdg42yVi
365Please respect copyright.PENANAo1IV48p6Lm
Link:365Please respect copyright.PENANAeMZBggoEoF
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio365Please respect copyright.PENANAPje67FrSSu
365Please respect copyright.PENANA2XKmSyuLBk
365Please respect copyright.PENANAGMfqhEAUiM
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。365Please respect copyright.PENANAPP33oLptYw
365Please respect copyright.PENANAn0Fe6fUF6V
Ref1:https://pubmed.ncbi.nlm.nih.gov/26763421/365Please respect copyright.PENANAV6rUJWBR98