黃金葡萄球菌這字眼,周不時亦會在新聞媒體聽得到。562Please respect copyright.PENANA6z6H6eHPlD562Please respect copyright.PENANAxyJfR93tkU
562Please respect copyright.PENANAKGHIyZBzVF
它之所以被冠以黃金這稱號,是因為它能夠製造大量金黃色的葡萄球菌黃素 (Staphyloxanthin),以及微量黃色化合物4,4‘-Diaponeurosporene。562Please respect copyright.PENANAHoDuISGqyl
562Please respect copyright.PENANAcT8NqXXido
(圖2)當細菌入侵腸道的時候,我們的腸道內壁細胞及前來救駕的免疫細胞會釋出微量雙氧水等的游離基(Reactive oxygen species),對細菌進行攻擊。562Please respect copyright.PENANA5M8BN4754R562Please respect copyright.PENANATmr9YcM0gL
562Please respect copyright.PENANAZd6EoqWd9I
但黃金葡萄球菌的金黃色葡萄球菌黃素及另外那種黃色化學物正是能夠中和游離基攻擊的色素,因此免疫系統所產生的游離基攻擊對它傷害不大。562Please respect copyright.PENANAz35fxzADRA
562Please respect copyright.PENANAxd6T80sMDc
然而,如果刪去製作色素的蛋白酶,「黃金」葡萄球菌失去抵擋游離基的手段,對宿主的感染力亦因而大大減低。562Please respect copyright.PENANA2yikNbbB9f
562Please respect copyright.PENANAODVZRkfD2N
(圖3)同時間,若將負責製造黃色色素的蛋白酶從黃金葡萄球菌轉移到另一款葡萄球菌,獲得了色素製作能力的它在老鼠身上所造成的感染傷害亦更之為強,引證色素對於細菌感染力的重要性。562Please respect copyright.PENANAYpk2TZjq7K562Please respect copyright.PENANALSThAW0AtW
562Please respect copyright.PENANAGDmUSxAOmu
(圖4)再舉另外一道例子,Cryptococcus neoformans是一種真菌(fungus),562Please respect copyright.PENANAxASoz0MzYC
它能夠製作黑色素(Melanin),亦即是上集所談及決定髮膚眼色的色素。562Please respect copyright.PENANAvIUSbvNRf4562Please respect copyright.PENANAMUgckEC0tj
562Please respect copyright.PENANALjUaUTsxjg
黑色素除了跟金黃色葡萄球菌黃素一樣能夠抵擋游離基的攻擊外,其本身帶有負極的性質更能與兩隻帶有正極的常用抗真菌素(amphotericin B 及 caspofungin)結合,大大削弱藥物傷害真菌的能力。562Please respect copyright.PENANAoDj94K2DKR
562Please respect copyright.PENANAowuK9bOjco
562Please respect copyright.PENANA1qb7rNBNPx
延伸閱讀:562Please respect copyright.PENANAPHdB2S1xx6
深入淺出–從深海生物中發掘出抗真菌藥物562Please respect copyright.PENANADtV96J34Ra
- 分享自 LIHKG 討論區562Please respect copyright.PENANAyZgQSxkFwO
https://lih.kg/2296185562Please respect copyright.PENANAbpZaFC8TA1
562Please respect copyright.PENANAsMGQIt1zt9
562Please respect copyright.PENANAPrxyRGURd1
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。562Please respect copyright.PENANAELfkMqAudN
562Please respect copyright.PENANArm0KZbzwt4
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/toc562Please respect copyright.PENANA1tBCNO440W
562Please respect copyright.PENANAfKQLeHyMC7
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。562Please respect copyright.PENANAjKbecEDntI
562Please respect copyright.PENANAt0JgGhN4iL
Link:562Please respect copyright.PENANAihckDyFcpi
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio562Please respect copyright.PENANAXgFdDPwchE
562Please respect copyright.PENANAOVwTMYK1dU
562Please respect copyright.PENANAijk9sebPNS
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。562Please respect copyright.PENANAE4gihE9M5D
562Please respect copyright.PENANAQrnKCd7mJY
Ref1:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2743764/562Please respect copyright.PENANAQxLHO0hPlu
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉
![薯仔聞茱莉](https://static2.penana.com/fit-in/24x24/images/users/large/10/56/10560680635a34d605a71d62.38826921-27349.jpeg)
篇 #181
三十秒科學–黃金葡萄球菌的「黃金」
喜歡 1
閱讀 558
書籤 148
campaign
催更 0
打賞
![](https://static2.penana.com/img/social/facebook.png)
按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人