We thank Ms.Xiaoyan Zou of Guangzhou Dreampharm Biotechnology Co.,Ltd
In this study, a technique that combines supercritical fluid extraction with ethanol extraction was employed to effectively fractionate egg yolk extracts into non-polar and polar lipids. By utilizing feature based molecular networking (FBMN) and MS-DIAL database search, 35 glycerolipids were identified in the supercritical extract (SE), and 70 glycerophospholipids in the ethanol extract (EE). Following the identification of lipids, a heatmap was generated using R software to visualize the abundance of lipids across both fractions. The results indicated that glycerolipids in SE primarily included C18:1, C16:0, and C18:2 fatty acids. In contrast, the glycerophospholipids present in EE exhibited a significant proportion of polyunsaturated fatty acids, notably docosahexaenoic acid (DHA, C22:6) and arachidonic acid (C20:4). Further analysis using GC–MS revealed that the combined content of DHA and arachidonic acid in EE exceeded 10 %. Moreover, EE exhibited potent anti-inflammatory activities, whereas SE showed significant analgesic effects in zebrafish model.
We thank Ms Xiaoyan ZouofGuangzhouDreampharmBiotechnologyCo.,Ltd.forsupplyingMStechnologyplatform.
Bufadienolides (BDs) are a class of naturally occurring toxins present in amphibian toads. Serving as the chemical weapons, they exist not only in the adult toads but also in toad eggs. Guided by mass spectrometry (MS)-based component analysis and feature-based molecular networking (FBMN), 30 bufadienolide-fatty acid conjugates (BDFs) were isolated from the fertilized eggs of toad Bufo gargrizans, including 25 previously undescribed compounds (1–25). Their chemical structures were elucidated by extensive spectroscopic analysis, chemical methods, and GC-MS. The toxicities of all BDFs and their corresponding free BDs were assessed using the zebrafish model. The structure–toxicity relationship analysis showed that the modification of BDs by hydroxy fatty acids can cause a significant increase of the toxicity. Furthermore, all the isolated compounds were evaluated for their antiproliferative activities in pancreatic cancer cell lines ASPC-1 and PANC10.05. The structure–activity relationship (SAR) analysis revealed that BDFs with hellebrigenin as the bufogenin moiety (6 and 7) exhibited the most potent antiproliferative effect. Further investigation into their functional mechanism demonstrated that 6 and 7 induced apoptosis in pancreatic cancer cells PANC10.05 and significantly suppressed the expression of the apoptosis-related gene c-MYC. In addition, 6 and 7 effectively inhibited the expression of the PI3K/Akt/mTOR pathway in PANC10.05. Moreover, we assessed the efficacy of 6 and 7 on cancer cells from various tissues and observed their broad-spectrum antiproliferative activity.