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。732Please respect copyright.PENANAh3IU1O6nWP
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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。732Please respect copyright.PENANARoJFuxxUzR
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究竟最終會否留有疤痕,是看幸運還是甚麼呢?732Please respect copyright.PENANAH2bJlMK717
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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。732Please respect copyright.PENANA2RovUWJGu7
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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。732Please respect copyright.PENANAypfKB0LHNL
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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。732Please respect copyright.PENANAkRlONWwkVL
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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。732Please respect copyright.PENANAwBcwTQrXeJ
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1.傷口塗上IMQ後,將會引起發炎作用。732Please respect copyright.PENANAW8CzWDoN4O
2.發炎作用刺激TRPA1神經細胞。732Please respect copyright.PENANAHyFswE4Ai8
3.免疫系統細胞(dermal dendritic cells、γδ T cells)被傳召前來。732Please respect copyright.PENANA3cKXUKS7Hg
4.免疫系統細胞釋出相關物質(Interlunkin17、22、23)。732Please respect copyright.PENANA2pCdiaW3Ds
5.一系列的過程發生過後,肌膚完美修復。732Please respect copyright.PENANAszUp658LAO
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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。732Please respect copyright.PENANALCQaaJCT55
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。732Please respect copyright.PENANAMjW53HuOxM
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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。732Please respect copyright.PENANATx1Jeh6Cyp
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!732Please respect copyright.PENANAIRyfPWI6QT
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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。732Please respect copyright.PENANAyhUMuYQGbR
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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/toc732Please respect copyright.PENANAL57XleS5YT
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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。732Please respect copyright.PENANA3T1iWLCshU
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Link:732Please respect copyright.PENANACACkTBIR31
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio732Please respect copyright.PENANAZE0OzB0ycZ
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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。732Please respect copyright.PENANAv51hQpFskK
https://petitions.whitehouse.gov/petition/support-hong-kong-restart-clean-2020-legislative-council-election-now732Please respect copyright.PENANASovkkKHQRo
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。732Please respect copyright.PENANAkkTc7yF7Pz
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Ref1:https://immunology.sciencemag.org/content/5/50/eaba5683
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