Flavanols and Flavanes from Crinum asiaticum and Their Effects on LPS Signaling Pathway Through the Inhibition of NF-κB Activation
Keyword(s):
2D Nmr
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AbstractThree new flavanols, (2R,3S)-7-methoxy-flavan-3-ol (1), (2R,3S)-7-hydroxy-flavan-3-ol (2), and (2R,3S)-2′-hydroxy-7-methoxy-flavan-3-ol (3), together with two known flavans (4 and 5), were isolated from the chloroform extract of Crinum asiaticum. Their structures were elucidated by various spectroscopic methods, including 1D and 2D NMR, HR-ESI-MS, and CD data. The isolated compounds 1 and 3−5 showed inhibitory activity toward LPS-induced nitric oxide (NO) production. Further investigation of the NF-κB pathway mechanisms indicated that 1 and 3−5 inhibited the LPS-induced IL-6 production and p65 subunit phosphorylation of NF-κB in RAW264.7 cells, with an effective dose of 10 µM.
2018 ◽
Vol 46
(06)
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pp. 1281-1296
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2017 ◽
Vol 12
(1)
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pp. 1934578X1701200
2009 ◽
Vol 2
(4)
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pp. 245-249
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2008 ◽
Vol 72
(10)
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pp. 2775-2778
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2018 ◽
Vol 120
(2)
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pp. 720-728
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Keyword(s):