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。753Please respect copyright.PENANAHhDH3V6BYb
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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。753Please respect copyright.PENANAlGjALc2doq
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究竟最終會否留有疤痕,是看幸運還是甚麼呢?753Please respect copyright.PENANAUZfBClzVlS
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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。753Please respect copyright.PENANA2LdaAUXheo
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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。753Please respect copyright.PENANAUYLgnfKtMQ
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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。753Please respect copyright.PENANAJD3Lt2R0oh
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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。753Please respect copyright.PENANARgKSK7CeIW
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1.傷口塗上IMQ後,將會引起發炎作用。753Please respect copyright.PENANAUCIWVpqLOL
2.發炎作用刺激TRPA1神經細胞。753Please respect copyright.PENANAmJOfjR6row
3.免疫系統細胞(dermal dendritic cells、γδ T cells)被傳召前來。753Please respect copyright.PENANAq6dgXlwCB5
4.免疫系統細胞釋出相關物質(Interlunkin17、22、23)。753Please respect copyright.PENANAhZvA18bg0o
5.一系列的過程發生過後,肌膚完美修復。753Please respect copyright.PENANAO6E5ceo0ZL
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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。753Please respect copyright.PENANAMkDm3X96Ws
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。753Please respect copyright.PENANA8mu3kEtb1b
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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。753Please respect copyright.PENANAb2MSnnHdpT
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!753Please respect copyright.PENANAczp7QpWaVQ
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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。753Please respect copyright.PENANAlCE7If5Yqw
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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/toc753Please respect copyright.PENANAkQKIlnBnBl
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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。753Please respect copyright.PENANA6OyN8KqJWr
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https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio753Please respect copyright.PENANAFPLbgpDh9c
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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。753Please respect copyright.PENANA9ITAZC3znq
https://petitions.whitehouse.gov/petition/support-hong-kong-restart-clean-2020-legislative-council-election-now753Please respect copyright.PENANAu01sYa7Myy
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。753Please respect copyright.PENANAsUYfIPHV6J
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Ref1:https://immunology.sciencemag.org/content/5/50/eaba5683
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