腎上腺(Adrenal gland)，故名思義就是位於腎臟上方的腺體。791Please respect copyright.ＰＥＮＡＮＡyZ7s7l5AMm
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。791Please respect copyright.ＰＥＮＡＮＡcSdUEvUMcn
791Please respect copyright.ＰＥＮＡＮＡvfkLeilAEg
791Please respect copyright.ＰＥＮＡＮＡekVB0TycgL
791Please respect copyright.ＰＥＮＡＮＡth4rIdzgVB
（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。791Please respect copyright.ＰＥＮＡＮＡvjlr1X2GlZ
791Please respect copyright.ＰＥＮＡＮＡr9ThHZ2gAD
791Please respect copyright.ＰＥＮＡＮＡnXF99DlIxO
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。791Please respect copyright.ＰＥＮＡＮＡUKaRyZRZgn
791Please respect copyright.ＰＥＮＡＮＡsZYoE63lEa
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。791Please respect copyright.ＰＥＮＡＮＡifP4EYdgPc
791Please respect copyright.ＰＥＮＡＮＡ2gxS76BEV4
（圖3）從圖中可見，皮質醇的存在是阻止毛髮生長的主因。791Please respect copyright.ＰＥＮＡＮＡc124cHPKcs
791Please respect copyright.ＰＥＮＡＮＡLtBl8yjJdV
791Please respect copyright.ＰＥＮＡＮＡVQQtTxlJLC
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。791Please respect copyright.ＰＥＮＡＮＡpd7s694WjM
791Please respect copyright.ＰＥＮＡＮＡTrkTfhcvPL
（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;791Please respect copyright.ＰＥＮＡＮＡA6TyqwhGVZ
除壓力外，年紀大亦會導致皮質醇含量上升。791Please respect copyright.ＰＥＮＡＮＡLvC9y3w1HQ
791Please respect copyright.ＰＥＮＡＮＡRO7ybBXDXb
791Please respect copyright.ＰＥＮＡＮＡmmtMW3DVVf
腎上腺被切除後，受壓對毛髮生長速度並無大影響。791Please respect copyright.ＰＥＮＡＮＡ1fGx8g4SkJ
791Please respect copyright.ＰＥＮＡＮＡXQ7p6g9Tf1
791Please respect copyright.ＰＥＮＡＮＡY6NUEKaHcJ
（圖5）上集提及過，頭髮生長分成3個階段。791Please respect copyright.ＰＥＮＡＮＡhHNi7sN9Pi
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。791Please respect copyright.ＰＥＮＡＮＡl2YdvHAwEd
791Please respect copyright.ＰＥＮＡＮＡ2r8qGcy2Y7
791Please respect copyright.ＰＥＮＡＮＡGenEsZjSUs
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。791Please respect copyright.ＰＥＮＡＮＡuVis66UXoy
791Please respect copyright.ＰＥＮＡＮＡudoh30yBQ5
791Please respect copyright.ＰＥＮＡＮＡHt8KGPmRtE
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。791Please respect copyright.ＰＥＮＡＮＡII4VcyVlb8
791Please respect copyright.ＰＥＮＡＮＡ6CoRnVRk7e
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。791Please respect copyright.ＰＥＮＡＮＡLUDNL9g0sf
791Please respect copyright.ＰＥＮＡＮＡN4Ry45CtuJ
791Please respect copyright.ＰＥＮＡＮＡa1Que7W1Jn
791Please respect copyright.ＰＥＮＡＮＡYMJP8sx3et
791Please respect copyright.ＰＥＮＡＮＡ4D8qUt3lSW
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。791Please respect copyright.ＰＥＮＡＮＡnYbnOIFDBl
791Please respect copyright.ＰＥＮＡＮＡYp0bwoSlTz
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/toc791Please respect copyright.ＰＥＮＡＮＡpl9t6SXJVo
791Please respect copyright.ＰＥＮＡＮＡKp0SmBI0Md
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。791Please respect copyright.ＰＥＮＡＮＡnLhsJGDkmf
791Please respect copyright.ＰＥＮＡＮＡ6nzkDySmME
Link:791Please respect copyright.ＰＥＮＡＮＡdmQsBxChrB
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio791Please respect copyright.ＰＥＮＡＮＡZ3XS0V3FmW
791Please respect copyright.ＰＥＮＡＮＡVvE2xnAagd
791Please respect copyright.ＰＥＮＡＮＡ1YmVWHXo8Z
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。791Please respect copyright.ＰＥＮＡＮＡwVa3zroErt
791Please respect copyright.ＰＥＮＡＮＡa7D0nL5Ukz
Ref1:https://www.nature.com/articles/s41586-021-03417-2791Please respect copyright.ＰＥＮＡＮＡNA1TrVS8Nm
791Please respect copyright.ＰＥＮＡＮＡPjUgo4ROl4
791Please respect copyright.ＰＥＮＡＮＡkhjXbGxnbI
星期六有重要演講，要花功夫溫習，明天及後天可能會停更。
791Please respect copyright.ＰＥＮＡＮＡUZSLyUhJtD
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
