科普專欄–薯不揀單 - 三十秒科學–長頸鹿的奧袐

長頸鹿是陸上最高的生物，其身體構造亦因此有著與眾不同的地方。439Please respect copyright.ＰＥＮＡＮＡhp6bv7Kfib
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（圖2）以血液循環系統方面來說，牠的心臟必須要抵受比其他動物更高的壓力才能把血液輸送到腦部裡頭。439Please respect copyright.ＰＥＮＡＮＡIpoIxxbsGy
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同時間，牠亦必須配備完善的機制來調節仰頭吃葉或低頭飲水所帶來的急劇血壓轉變。439Please respect copyright.ＰＥＮＡＮＡKoBTxOz2ra
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若然調節失衡的話，很大機會對其他器官構成威脅及傷害。439Please respect copyright.ＰＥＮＡＮＡOJh8zY2xSs
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（圖3）研究發現，長頸鹿的FGFRL1基因出現7道沒能在其他動物(包括人類)尋覓得到的變異。439Please respect copyright.ＰＥＮＡＮＡjCO7oVfpAm
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有科學家把老鼠的FGFRL1基因轉換成長頸鹿的版本，並為老鼠們注射會引致高血壓的藥物。439Please respect copyright.ＰＥＮＡＮＡ6G7GvSwR0A
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正常老鼠的上下壓在藥物影響下錄得了顯著上升，但擁有長頸鹿版本的老鼠其上下壓並沒有出現顯著的上升。439Please respect copyright.ＰＥＮＡＮＡrJbpdm5wMJ
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（圖4）最為神奇的是，正常老鼠在藥物的影響下所出現的心肌纖維化徵狀，並沒有出現在長頸鹿版本的老鼠身上。439Please respect copyright.ＰＥＮＡＮＡOE6vCSJRJh
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科學家正在嘗試拆解長頸鹿FGFRL1基因版本對心臟等方面所影響的機制，若果能透徹亦剖析整套機制，或許可用作建構抵禦高血壓或其他心臟問題的藥物。439Please respect copyright.ＰＥＮＡＮＡaXiZmN3iyW
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Ref1:https://advances.sciencemag.org/content/7/12/eabe9459439Please respect copyright.ＰＥＮＡＮＡyl1FCN899W

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