白內障是糖尿病引發出的一種常見徵狀,而箇中的因由,事實上是與我們日常生活息息相關的。424Please respect copyright.PENANAi0SamjvHxc424Please respect copyright.PENANA2t1FJajR6f
424Please respect copyright.PENANAHv59sLmv0C
(圖2)我們眼睛的Lens部位之所以呈透明,主要是因為裡頭一種名為Crystallin的蛋白質所致。424Please respect copyright.PENANA1xSgz8dGkF424Please respect copyright.PENANAbo0Xrmyo02
424Please respect copyright.PENANAWe1qYTA3U5
氨基酸組合成一起的話,我們會稱之為蛋白質。424Please respect copyright.PENANAZPhLdG65zF
424Please respect copyright.PENANATtredtMazH
而糖尿病所引起的白內障,就是糖份與Crystallin蛋白質的氨基酸產生反應,形成淡黃色的物質所致。424Please respect copyright.PENANAuv6aAAdkJL
424Please respect copyright.PENANApoqkuS3XhJ
(圖3)氨基酸與某類別的糖份在高溫處理下,便會產生啡色物質及帶有香味等等的化學物,這個過程又稱之為梅納反應 (Maillard reaction);424Please respect copyright.PENANA0iiMeImlGs
424Please respect copyright.PENANAB0OPMDM5WK
雖然梅納本人發佈梅納反應結果的時候,隻字沒有提及過會在食物上產生。424Please respect copyright.PENANAwCQrKSJDTX424Please respect copyright.PENANAFIsF5R9MpY
424Please respect copyright.PENANAOWBKnCSjhE
而糖尿病白內障的形成,原理跟梅納反應非常接近,同樣是血糖與Crystallin氨基酸產生啡黃色物質所致。424Please respect copyright.PENANAnOvv21QvFk
424Please respect copyright.PENANAKjckuUcCOZ
不同的是,白內障整個過程是長期在37度裡頭發生,而我們日常煮食/焗麵包/燒烤的溫度大多情況下會比37度為高,故此眼睛產生啡黃色物質的速度亦比較緩慢。424Please respect copyright.PENANA5I8A8NcP12
424Please respect copyright.PENANAsd4aS3cP1R
有科學家亦曾嘗試將牛及人類的眼睛晶片放在陰暗位置的糖水裡10個月,其分離出的淡黃色物質,跟患有白內障的眼睛晶片所分離出的是一模一樣。424Please respect copyright.PENANAKZbt185qiV
424Please respect copyright.PENANApacYvPTSGx
424Please respect copyright.PENANAqWx75VF7jZ
424Please respect copyright.PENANAn0CMSCQG7n
蛋白質產生出來後,細胞會有機制會將其毀滅,然後再產生新的蛋白質;424Please respect copyright.PENANA6NS9us58cR
尤其是蛋白質出現不正常的改變或損毀的時候,這過程尤為重要。424Please respect copyright.PENANAbiKCRzXYfq
424Please respect copyright.PENANAv6baNXmU6W
而眼睛晶片的Crystallin蛋白質,因為天生屬於「毀滅然後再生」極為緩慢的一群,因此就算遭受到糖份改造,細胞亦沒能作出處理及更正。424Please respect copyright.PENANAsldI2XOBBq
424Please respect copyright.PENANAFHof9LSr8x
424Please respect copyright.PENANATh5ngBm5JT
除眼睛晶片外,紅血球亦是遭受糖份梅納反應影響的一群。因此很多時候,某類別被糖份改造的紅血球含量會成為探測糖尿病的指標。424Please respect copyright.PENANANZCZ7yviiO
424Please respect copyright.PENANAd1Ufd14hUl
424Please respect copyright.PENANA0UlFAUeHXn
424Please respect copyright.PENANAWSoD1qACZQ
424Please respect copyright.PENANAzAKCNbuEG8
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。424Please respect copyright.PENANAV6teqe0SkF
424Please respect copyright.PENANAdASBHSsBjl
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/toc424Please respect copyright.PENANAVm8LQISiqR
424Please respect copyright.PENANATQhplt9GU3
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。424Please respect copyright.PENANABBpGCR48Yg
424Please respect copyright.PENANAyoVbJMlrGj
Link:424Please respect copyright.PENANAWWI27YYMCJ
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio424Please respect copyright.PENANAMgTTIA14i0
424Please respect copyright.PENANAiHt5lZif8w
424Please respect copyright.PENANAd83U4Lr5RV
除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。424Please respect copyright.PENANAaoKuyn4mqU
424Please respect copyright.PENANAQ6HtbcLCdD
Ref1:https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201308808424Please respect copyright.PENANAJHNHxzKAKI
Ref2:https://science.sciencemag.org/content/211/4481/491/tab-pdf424Please respect copyright.PENANAzXCdAGlhTm