Protein tyrosine phosphatase 1B inhibitors from Morus root bark |
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Authors: | Cui Long Na Minkyun Oh Hyuncheol Bae Eun Young Jeong Dae Gwin Ryu Seong Eon Kim Sohee Kim Bo Yeon Oh Won Keun Ahn Jong Seog |
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Affiliation: | Korea Research Institute of Bioscience and Biotechnology (KRIBB), 52 Eoun-dong, Yuseong-gu, Daejeon 305-333, Republic of Korea. |
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Abstract: | An organic layer prepared from the Chinese crude drug 'Sang-Bai-Pi' (Morus root bark) was studied in order to identify the inhibitory compounds for protein tyrosine phosphatase 1B (PTP1B). Bioassay-guided fractionation resulted in the isolation of sanggenon C (1), sanggenon G (2), mulberrofuran C (3) and kuwanon L (4) as PTP1B inhibitors, along with moracin O (5) and moracin P (6). Compounds 1-4 inhibited PTP1B with IC(50) values ranging from 1.6+/-0.3 microM to 16.9+/-1.1 microM. |
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