科普專欄–薯不揀單 - 三十秒科學–壓力大導致毛髮生長速度減慢

腎上腺(Adrenal gland)，故名思義就是位於腎臟上方的腺體。731Please respect copyright.ＰＥＮＡＮＡCEhbPUmvVA
它有著釋放出各種荷爾蒙的功能，例如皮質醇(Corticosterone)、腎上腺素(Adrenaline)及醛固酮 (Aldosterone)等等。731Please respect copyright.ＰＥＮＡＮＡULPpNkTGVX
731Please respect copyright.ＰＥＮＡＮＡ7nOtvKE2Tz
731Please respect copyright.ＰＥＮＡＮＡvMRBuCAotC
731Please respect copyright.ＰＥＮＡＮＡPmjn4ESS8m
（圖2）研究發現，被切除腎上腺的老鼠(ADX)，其生長毛髮的速度比正常老鼠(Sham)的為快。731Please respect copyright.ＰＥＮＡＮＡlBlL9ewphJ
731Please respect copyright.ＰＥＮＡＮＡT7fdYJjhsx
731Please respect copyright.ＰＥＮＡＮＡcxmDWOCBQb
從圖中可見，ADX老鼠在剃毛後16日已經差不多長滿毛髮，而Sham老鼠在40日後還是接近沒有生長毛髮似的。731Please respect copyright.ＰＥＮＡＮＡ2yECoOkBA6
731Please respect copyright.ＰＥＮＡＮＡrTXi0Mg5lf
因著腎上腺有著產生荷爾蒙的功能，科學家於是量度老鼠體內的荷爾蒙，並發現ADX老鼠體內的皮質醇(Corticosterone)明顯下降，但腎上腺素(Adrenaline)含量則沒有大變化。731Please respect copyright.ＰＥＮＡＮＡj7eZ8pvFm1
731Please respect copyright.ＰＥＮＡＮＡSEFuhPMZ7P
（圖3）從圖中可見，皮質醇的存在是阻止毛髮生長的主因。731Please respect copyright.ＰＥＮＡＮＡ2dnFmZFLaL
731Please respect copyright.ＰＥＮＡＮＡH5rIrddnQ6
731Please respect copyright.ＰＥＮＡＮＡyOPzxOhnHw
非常重要的是，皮質醇短暫性高企是不會對毛髮生長速度有所影響，皮質醇長期的存在才會有壓抑作用。731Please respect copyright.ＰＥＮＡＮＡjkNywCaTWc
731Please respect copyright.ＰＥＮＡＮＡMlawOOGbNO
（圖4）遇上壓力時，皮質醇含量便會上升，從圖中可見壓力對老鼠毛髮生長速度的影響;731Please respect copyright.ＰＥＮＡＮＡqGFMCZ2ukg
除壓力外，年紀大亦會導致皮質醇含量上升。731Please respect copyright.ＰＥＮＡＮＡk5RtvUUuyy
731Please respect copyright.ＰＥＮＡＮＡCSt6Q33gdC
731Please respect copyright.ＰＥＮＡＮＡAA9inmEdnL
腎上腺被切除後，受壓對毛髮生長速度並無大影響。731Please respect copyright.ＰＥＮＡＮＡochAzayvdP
731Please respect copyright.ＰＥＮＡＮＡBLvu8y70ZE
731Please respect copyright.ＰＥＮＡＮＡRVGv6oYLQ3
（圖5）上集提及過，頭髮生長分成3個階段。731Please respect copyright.ＰＥＮＡＮＡqDD07iBqMW
研究發現，Sham老鼠及ADX老鼠的anagen及catagen時域並無大分別，唯獨是正常老鼠的telogan階段會持續上升，而ADX老鼠則既短暫而又沒有大變化。731Please respect copyright.ＰＥＮＡＮＡJ7mVHKmcxY
731Please respect copyright.ＰＥＮＡＮＡis9WiYPL6q
731Please respect copyright.ＰＥＮＡＮＡKW52zouXk7
16個月的時段裡，ADX老鼠已經能完成10次毛髮3階段，而Sham老鼠僅能完成3次。731Please respect copyright.ＰＥＮＡＮＡnLV5qyCNOy
731Please respect copyright.ＰＥＮＡＮＡmNO5A2JTfR
731Please respect copyright.ＰＥＮＡＮＡPZayZsLEqw
雖然老鼠毛髮生長的理論未必能百分百套用到心類之中，但作者在文中已深入指出皮質醇是依靠影響毛髮幹細胞周遭的細胞來影響毛髮生長。731Please respect copyright.ＰＥＮＡＮＡA2cjm69oJ1
731Please respect copyright.ＰＥＮＡＮＡ5srkFrnGtW
或許日後可以製造出藥物來針對其機制，解決人類脫髮的煩惱。731Please respect copyright.ＰＥＮＡＮＡ4weYmKsRGu
731Please respect copyright.ＰＥＮＡＮＡipURkZQq0w
731Please respect copyright.ＰＥＮＡＮＡhLv7zrH4uW
731Please respect copyright.ＰＥＮＡＮＡDxjB5mQWJE
731Please respect copyright.ＰＥＮＡＮＡr6H1o2EbC6
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。731Please respect copyright.ＰＥＮＡＮＡsIkrqoWQmW
731Please respect copyright.ＰＥＮＡＮＡ43b1FD5Ctd
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/toc731Please respect copyright.ＰＥＮＡＮＡbIBWQBeZU8
731Please respect copyright.ＰＥＮＡＮＡbCTMcqumrI
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。731Please respect copyright.ＰＥＮＡＮＡsuGsXvAPdQ
731Please respect copyright.ＰＥＮＡＮＡLd0RENneXQ
Link:731Please respect copyright.ＰＥＮＡＮＡhgEvl7QQea
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio731Please respect copyright.ＰＥＮＡＮＡSaxhXYZJIT
731Please respect copyright.ＰＥＮＡＮＡ5l3Z3vyGT0
731Please respect copyright.ＰＥＮＡＮＡatyYWLNIXe
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。731Please respect copyright.ＰＥＮＡＮＡYYkeWSOc5R
731Please respect copyright.ＰＥＮＡＮＡrD1kX1dlcH
Ref1:https://www.nature.com/articles/s41586-021-03417-2731Please respect copyright.ＰＥＮＡＮＡWOWLko5N3d
731Please respect copyright.ＰＥＮＡＮＡ4fKNpLRYas
731Please respect copyright.ＰＥＮＡＮＡY2HdVcaCbk
星期六有重要演講，要花功夫溫習，明天及後天可能會停更。 #adore# #adore# #adore# #adore# #adore# 731Please respect copyright.ＰＥＮＡＮＡ8csrnnY9sA