Lee Jung Im, Kim In-Hye, Choi Youn Hee, Kim Eun-Young, Nam Taek-Jeong
Nat Prod Commun. 2014 Nov;9(11):1585-8.
In this report, the PTP1B inhibitory effect of Calystegia soldanella was investigated. Bioassay-guided fractionation of the crude extracts revealed that the n-hexane fraction had the strongest PTP1B inhibitory effect. Nine known alkyl p-coumarates were isolated from the n-hexane fraction, and each compound was evaluated for its effect on PTP1B. All compounds effectively inhibited PTP1B activity. The IC50 values of the compounds were 3 (10.8 μg/mL) > 2 (15.5 μg/mL) > 7 (26.6 μg/mL) > 1 (37.0 μg/mL) > 8 (41.2 μg/mL) > 9 (43.4 μg/mL) > 5 (44.7 μg/mL) > 4 (> 50 μg/mL) > 6 (> 50 μg/mL).
在本报告中,对打碗花的蛋白酪氨酸磷酸酶1B(PTP1B)抑制作用进行了研究。对粗提物进行生物活性导向分离后发现,正己烷萃取物具有最强的PTP1B抑制作用。从正己烷萃取物中分离出9种已知的对香豆酸烷基酯,并对每种化合物的PTP1B抑制作用进行了评估。所有化合物均能有效抑制PTP1B活性。这些化合物的半数抑制浓度(IC50)值分别为3(10.8 μg/mL)> 2(15.5 μg/mL)> 7(26.6 μg/mL)> 1(37.0 μg/mL)> 8(41.2 μg/mL)> 9(43.4 μg/mL)> 5(44.7 μg/mL)> 4(> 50 μg/mL)> 6(> 50 μg/mL)。