Methylnissolin(astrapterocarpan)是从黄芪(Astragalus membranaceus)中分离得到的化合物,能够抑制血小板衍生生长因子(PDGF)-BB 诱导的细胞增殖,其 IC50 值为 10 μM。此外,Methylnissolin 还能通过抑制 PDGF-BB 诱导的细胞外信号调节激酶 1/2 (ERK1/2) 丝裂原活化蛋白(MAP)激酶的磷酸化来抑制 ERK1/2 MAP 激酶级联反应,从而抑制血管平滑肌细胞增殖。
靶点PDGFR | IC50: 10 μM |
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ERK1 | |
ERK2 |
白色结晶粉末,可溶于甲醇、乙醇、DMSO 等有机溶剂,来源于黄芪(Astragalus membranaceus (Fisch.) Bunge.)。
用途抗菌,抗癌。可用于含量测定/鉴定/药理实验等。
In this study, an improved UPLC-MS (Ultra-high performance liquid chromatography-tandem mass spectrometry) method for simultaneously quantifying twelve major components belonging to two chemical types was developed and validated, and was applied to quantitatively compare the quality of sulfur-fumigated Astragali Radix of different durations and of the fresh reference sample. The results showed that the contents of triterpenes astragaloside III and astragaloside IV decreased moderately, while the flavonoids calycosin, formononetin, and 7,2′-dihydroxy-3′,4′-dimethoxyisoflavane decreased significantly. The corresponding flavonoid glycosides increased accordingly, which indicated the occurrence of chemical transformation of flavonoids and glycosides in the process of sulfur-fumigation. These transformations were further confirmed by the synthesis of flavonoid glycosides under simulated sulfur-fumigation circumstances. Furthermore, the sulfur-fumigated duration varied in proportion with the contents of compounds 7, 11, and 12. These results suggest that the established method was precise, accurate and sensitive enough for the global quality evaluation of sulfur-fumigated Astragali Radix. Further, sulfur-fumigation not only changes the proportions of bioactive components, but also causes chemical transformation in Astragali Radix.