Rubiyunnanins C–H, cytotoxic cyclic hexapeptides from Rubia yunnanensis inhibiting nitric oxide production and NF-κB activation
摘要:
Six new (rubiyunnanins C-H, 1-6) and five known (7-11) cyclic hexapeptides were isolated from the roots of Rubia yunnanensis (Franch.) Diels. The structures and stereochemistry of 1-6 were established by extensive spectroscopic analyses and chemical methods. All compounds (1-11) not only exhibited cytotoxic activities against a panel of eleven cancer cell lines with IC50 values ranging from 0.001 to 56.24 mu M, but also exerted inhibitory activities against nitric oxide (NO) production in LPS and IFN-gamma-induced RAW 264.7 murine macrophages with IC50 values ranging from 0.05 to 12.68 mu M. Furthermore, this is the first time it is being reported that compounds 2 and 7-10 significantly inhibited TNF-alpha-induced NF-kappa B activation in HEK-293-NF-kappa B luciferase stable cells with IC50 values of 35.07, 0.03, 1.69, 12.64 and 1.18 mu M, respectively. (C) 2010 Elsevier Ltd. All rights reserved.
Rubiyunnanins C–H, cytotoxic cyclic hexapeptides from Rubia yunnanensis inhibiting nitric oxide production and NF-κB activation
作者:Jun-Ting Fan、Jia Su、Yan-Min Peng、Yan Li、Jia Li、Yu-Bo Zhou、Guang-Zhi Zeng、He Yan、Ning-Hua Tan
DOI:10.1016/j.bmc.2010.10.019
日期:2010.12
Six new (rubiyunnanins C-H, 1-6) and five known (7-11) cyclic hexapeptides were isolated from the roots of Rubia yunnanensis (Franch.) Diels. The structures and stereochemistry of 1-6 were established by extensive spectroscopic analyses and chemical methods. All compounds (1-11) not only exhibited cytotoxic activities against a panel of eleven cancer cell lines with IC50 values ranging from 0.001 to 56.24 mu M, but also exerted inhibitory activities against nitric oxide (NO) production in LPS and IFN-gamma-induced RAW 264.7 murine macrophages with IC50 values ranging from 0.05 to 12.68 mu M. Furthermore, this is the first time it is being reported that compounds 2 and 7-10 significantly inhibited TNF-alpha-induced NF-kappa B activation in HEK-293-NF-kappa B luciferase stable cells with IC50 values of 35.07, 0.03, 1.69, 12.64 and 1.18 mu M, respectively. (C) 2010 Elsevier Ltd. All rights reserved.