Science Focus ( Issue 007 ) - page 21

By Andy Cheung
張文康
2015年度
邵逸夫生命科學與醫學獎 得主
邦妮•巴斯勒教授
彼德•格林伯格教授
T he poten t i a l o f an t i - quo r um - s en s i ng
technology is two-fold. Prof. Bassler’s ground-
breaking discovery has provided “a needed proof-
of-principle” that quorum sensing technology
can be put into practice and be used to develop
novel drugs in the war against bacteria. The
unfor tunate truth is that bacteria out-evolve
current antibiotics, but her research is not limited
to drug development. She suggests that pro-
quorum-sensing (which is the opposite of anti-
quorum-sensing) could be used to spur bacterial
behaviours that could be applied to industrial,
agricultural or environmental uses.
In addition to being a world-renowned scientist,
Prof. Bassler is also well-known for her regular
appearances at TED talks to promote the social
responsibilities of scientists. A firm believer that
scientists bear the responsibility of promoting
their research to the layman, she makes
sure that her research on quorum sensing
is both vivid and attainable. Watch one
可以擾亂群體感應,令細菌不能探測到同伴的存在,其致病
能力也就大大降低。
抗生素是通過抑制微生物的代謝,或破壞細胞結構以
發揮效用。不過,長期濫用抗生素可能會導致細菌抗藥性,
尤其是當劑量不足以徹底消除細菌時。每種新抗生素都要
經歷漫長的研究開發過程才可投入廣泛使用,相反,細菌只
需很短時間就可以發展出抗藥性,這是一個非常棘手的問
題。抗群體感應則以全新的方法對抗細菌。巴斯勒教授指
出:「抗群體感應策略影響了細菌的行為,而不是直接殺死
它們或延緩其成長。因此相對於傳統的抗菌藥物,細菌的
抵抗會來得較慢。」換句話說,當細菌不用面對滅亡時,求
生的演化壓力就會減弱,容許我們的免疫系統有額外時間
去消滅它們。如巴斯勒教授所言,這創新策略無疑是「為控
制細菌提供了新路徑以及可能性。」
抗群體感應技術的應用潛力有兩方面。貝斯勒教授的突
破性研究提供了概念性驗證,說明群體感應技術是可以付
諸實踐,並且用於開發新藥對抗細菌。現有的抗生素實已不
足以應付不斷演變的細菌。不僅如此,巴斯勒教授認為「親
群體感應」(即是抗群體感應的反面)也可用於工業、農業
或環境等領域,鼓勵相關的細菌行為。
巴斯勒教授不僅是舉世知名的科學家,她也經常在TED
平臺演說,宣揚科學家的社會責任。她堅信科學家有責任
深的群體感應技術解釋得生動易明。
of her TED talks at
watch?v=KXWurAmtf78!
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