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。995Please respect copyright.ＰＥＮＡＮＡNhMJsQVVoq
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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。995Please respect copyright.ＰＥＮＡＮＡk0PgTJQ6VV
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究竟最終會否留有疤痕，是看幸運還是甚麼呢？995Please respect copyright.ＰＥＮＡＮＡDvdPLHN9ZC
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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。995Please respect copyright.ＰＥＮＡＮＡvPs5jsoWzS
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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。995Please respect copyright.ＰＥＮＡＮＡPpEPYDkGbq
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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。995Please respect copyright.ＰＥＮＡＮＡKI3a347W58
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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。995Please respect copyright.ＰＥＮＡＮＡHpU3Sqpxfw
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1.傷口塗上IMQ後，將會引起發炎作用。995Please respect copyright.ＰＥＮＡＮＡmrSpTMDROJ
2.發炎作用刺激TRPA1神經細胞。995Please respect copyright.ＰＥＮＡＮＡws6kZwNZEl
3.免疫系統細胞（dermal dendritic cells、γδ T cells）被傳召前來。995Please respect copyright.ＰＥＮＡＮＡDNP3n0Rppc
4.免疫系統細胞釋出相關物質（Interlunkin17、22、23）。995Please respect copyright.ＰＥＮＡＮＡL7VdgO92Az
5.一系列的過程發生過後，肌膚完美修復。995Please respect copyright.ＰＥＮＡＮＡeJYwg0hPYT
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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。995Please respect copyright.ＰＥＮＡＮＡsF5DuxVLdi
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。995Please respect copyright.ＰＥＮＡＮＡFxeUTDlgE3
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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。995Please respect copyright.ＰＥＮＡＮＡ0IBQTv6WPU
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！995Please respect copyright.ＰＥＮＡＮＡ7vzFqqI8TE
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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。995Please respect copyright.ＰＥＮＡＮＡecwTV6h6n7
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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/toc995Please respect copyright.ＰＥＮＡＮＡhbSgM2iyWw
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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。995Please respect copyright.ＰＥＮＡＮＡDVNcRErSnW
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Link:995Please respect copyright.ＰＥＮＡＮＡqF0WUJ0O7L
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio995Please respect copyright.ＰＥＮＡＮＡFuGjkcFutD
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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。995Please respect copyright.ＰＥＮＡＮＡJYercaLoEG
https://petitions.whitehouse.gov/petition/support-hong-kong-restart-clean-2020-legislative-council-election-now995Please respect copyright.ＰＥＮＡＮＡeWLX8y0SrP
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。995Please respect copyright.ＰＥＮＡＮＡj4MNiin6hX
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Ref1:https://immunology.sciencemag.org/content/5/50/eaba5683
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