皮膚受傷的時候，大多數的情況下都會出現結焦情況，過一段時間後傷口便會縫合。959Please respect copyright.ＰＥＮＡＮＡMXuIEsqrmV
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有時候，皮膚會留有疤痕，但又有一些情況下會不留痕跡般似的進行修復，就像沒有事發生過一樣。959Please respect copyright.ＰＥＮＡＮＡJxQ7P4TB3X
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究竟最終會否留有疤痕，是看幸運還是甚麼呢？959Please respect copyright.ＰＥＮＡＮＡr0U5HG7eYR
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（圖2）近日，有科學家發表文章(Ref1)，對此作出了一個頗為完滿的解答。959Please respect copyright.ＰＥＮＡＮＡpn11zEQtOO
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他們在老鼠耳仔上開一個細洞，然後再緊密觀察其康復情況。他們發現塗上會引起發炎作用的Imiquimod(IMQ)後，傷口會完美修復不留疤。959Please respect copyright.ＰＥＮＡＮＡhKmYB0MoOd
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而在缺乏TRPA1神經細胞的老鼠，就算塗上(IMQ)，傷口始終會留有疤痕，表示TRPA1神經細胞在皮膚的修復上顯然有著重要作用。959Please respect copyright.ＰＥＮＡＮＡFnZwf4VV7i
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（圖3）他們進行了一系列的實驗，最終找出了箇中機制，以下為最簡化版本。959Please respect copyright.ＰＥＮＡＮＡ6U9wphe4qn
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1.傷口塗上IMQ後，將會引起發炎作用。959Please respect copyright.ＰＥＮＡＮＡ5bRYANRlrY
2.發炎作用刺激TRPA1神經細胞。959Please respect copyright.ＰＥＮＡＮＡ7XceBuqVOh
3.免疫系統細胞（dermal dendritic cells、γδ T cells）被傳召前來。959Please respect copyright.ＰＥＮＡＮＡqU6ERmqw8a
4.免疫系統細胞釋出相關物質（Interlunkin17、22、23）。959Please respect copyright.ＰＥＮＡＮＡpweWmWUhjF
5.一系列的過程發生過後，肌膚完美修復。959Please respect copyright.ＰＥＮＡＮＡvLll6Y3Ryv
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此研究的結果針對於老鼠的皮膚癒合情況，未必能套用在人類身上，需要作出人體試驗才能廣泛證實此結果。959Please respect copyright.ＰＥＮＡＮＡrj75mcyNLB
另外，IMQ的塗用時機還需要進一步確認，何時觸發發炎作用才是適當的時機還需要一系列的測試。959Please respect copyright.ＰＥＮＡＮＡ0yhn3hAWEV
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不過有一點非常重要的是，當人類皮膚受傷的時候，自身是不會主動觸動TRPA1神經細胞。959Please respect copyright.ＰＥＮＡＮＡ4meRw64GLH
若然整個結果能套用在人類身上的話，那亦是代表我們日後可塗上適當的藥膏刺激皮膚下的TRPA1細胞，觸發一系列的過程使傷口以不留疤痕的方式完美癒合！959Please respect copyright.ＰＥＮＡＮＡnbcrJxmaEB
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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。959Please respect copyright.ＰＥＮＡＮＡYa6WPzYErA
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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/toc959Please respect copyright.ＰＥＮＡＮＡhImGLnTs1p
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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。959Please respect copyright.ＰＥＮＡＮＡKzGcQmgzw3
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Link:959Please respect copyright.ＰＥＮＡＮＡo1guafTJft
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio959Please respect copyright.ＰＥＮＡＮＡXMCb1CsWM7
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最後亦請幫一幫忙簽署袁爸的白宮呈請，幫忙為香港出一份力。959Please respect copyright.ＰＥＮＡＮＡba8VUe7WEs
https://petitions.whitehouse.gov/petition/support-hong-kong-restart-clean-2020-legislative-council-election-now959Please respect copyright.ＰＥＮＡＮＡ2rPHGwfOKa
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。959Please respect copyright.ＰＥＮＡＮＡ03J5N6DjJQ
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Ref1:https://immunology.sciencemag.org/content/5/50/eaba5683
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