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Investigating the �logic puzzle� of traditional Chinese medicine: deciphering the cooperative protective effect of natural remedies against oxidative damage

Name: Kejun “Coco” Liu
Major: Biochemistry and Molecular Biology
Advisor: Dr. Sara Martin, Dr. James West (second reader)
Humans are under constant threat from oxidant exposure. This correlates with aging and diseases such as diabetes, cardiovascular diseases, neurodegenerative diseases, and even cancer. Medical plants frequently used in Chinese Herbal Medicine (CHM) have the ability to cure or prevent the oxidative damage, but the underlying bioactive mechanism of those remedies has not been elucidated. Approaches to improve understanding have been made to solve the �Logic Puzzle� of each herb and their active ingredients to and link specific compounds with their biomedical functions, but rarely have research efforts considered the outcomes of using combinations of active ingredients from CHM, on health. Thisstudyexploredthe cooperative effect of two specific compounds, hyperoside(HYP) and artemisinin(ART), active ingredients of the herb pair treatments of AA-LJ (A. annua���Ի���L. japonica)in CHM, against oxidative damage in Saccharomyces cerevisiae, commonly known as Baker�s yeast.
The cooperative enhancement in the antioxidanteffect of the two compoundswasexamined uponexposure to commoncauses of oxidative damage, carbon tetrachloride and hydrogenperoxide.These studies indicate thata combinationof both ART and HYP could provide immediate preventionofoxidative damage introduced by H₂O₂. Additionally,application of both ART and HYP creates persistentprevention ofoxidative damage introduced by CCl_4.This result sheds some light on the mechanism of action of thebioactive ingredients in the AA-LJ herb pair, ART and HYP, and increases our understanding of the oxidantdefensemechanism of yeast.

Coco will be online to field comments on April 16:
10am-noon EDT (Asia: late evening, PST: 6-8am, Africa/Europe: late afternoon)

Posted in I.S. Symposium 2021, Independent Study on April 8, 2021.