Cytotoxicity of Triterpenes from Green Walnut Husks of Juglans mandshurica Maxim in HepG-2 Cancer Cells.
Among the classes of identified natural products, triterpenoids, one of the largest families, have been studied extensively for their diverse structures and variety of biological activities, including antitumor effects. In the present study, a phytochemical study of the green walnut husks of Juglans mandshurica Maxim led to the isolation of a new dammarane triterpene, 12β, 20(R), 24(R)-trihydroxydammar-25-en-3-one (6), together with sixteen known compounds, chiefly from chloroform and ethyl acetate extracts. According to their structural characteristics, these compounds were divided into dammarane-type, oleanane- and ursane-type. Dammarane-type triterpenoids were isolated for the first time from the Juglans genus. As part of our continuing search for biologically active compounds from this plant, all of these compounds were also evaluated for their cytotoxic activities against the growth of human cancer cells lines HepG-2 by the MTT assay. The results were shown that 20(S)-protopanaxadiol, 2α,3β,23-trihydroxyolean-12-en-28-oic acid and 2α,3β,23-trihydroxyurs-12-en-28-oic acid exhibited better cytotoxicity in vitro with IC50 values of 10.32±1.13, 16.13±3.83, 15.97±2.47 μM, respectively. Preliminary structure-activity relationships for these compounds were discussed.
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. zhouyuanyuan1998@163.com.
Yuanyuan
Y
Zhou
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. ybywater@163.com.
Bingyou
B
Yang
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. liu_zhao_xi@163.com.
Zhaoxi
Z
Liu
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. jiangyanqiu219@163.com.
Yanqiu
Y
Jiang
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. ZYC19901014@126.com.
Yuxin
Y
Liu
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. fl0451@outlook.com.
Lei
L
Fu
College of Adult Education, Heilongjiang University of Chinese Medicine, Harbin 150040, China. wangxiaolicando2000@126.com.
Xiaoli
X
Wang
College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin 150040, China. hxkuang@hotmail.com.
Haixue
H
Kuang
D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D056945:Hep G2 Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D031324:Juglans / Q000737:chemistry*; D009754:Nuts / Q000737:chemistry*; D013329:Structure-Activity Relationship; D014315:Triterpenes / Q000494:pharmacology*
D000972:Antineoplastic Agents, Phytogenic; D014315:Triterpenes
Juglans mandshurica Maxim; cytotoxic activity; green walnut husks; structure-activity relationships; triterpenoid aglycones