丁二烯内酯是一类天然的强心类固醇,以其抗肿瘤活性而闻名。不良的水溶性阻碍了它们的临床应用。酶促糖基化是改善天然产物的溶解度的有利方法。在这项工作中,我们描述了高效的一步法合成布法地那利O-葡萄糖苷和O-半乳糖苷使用微生物糖基转移酶YjiC1,转化率从63%到99%。从14种底物中获得了总共24种糖苷,包括17种新化合物,并通过广泛的NMR和高分辨率电喷雾电离质谱(HR-ESI-MS)分析鉴定了它们的结构。这些产物属于五种类型:3β-OH,7β-OH,3β,7β-di-OH,11α-OH和12β-OH的糖基化。的C-7β或C-11α Ö bufadienolide的-glycosides报道首次。此外,3- O-糖苷对A549和MCF7人癌细胞系表现出显着的细胞毒活性,并显示出对Na + / K + -ATPase的有效抑制活性(IC 50)值在0.053-0.76μM范围内。特别是,bufalin
DOI:
10.1002/adsc.201700777
作为产物:
描述:
蟾毒灵 在
mycelia of Cunninghamella blakesleana AS 3.970 作用下,
以
乙醇 为溶剂,
反应 96.0h,
以52.7 mg的产率得到12α-hydroxybufalin
参考文献:
名称:
Microbial Hydroxylation of Bufalin by Cunninghamella blakesleana and Mucor spinosus
摘要:
The microbial transformation of a cytotoxic bufadienolide, bufalin (1), was carried out using two strains of filamentous fungi. Cunninghamella blakesleana catalyzed the specific 12 alpha-hydroxylation of bufalin and produced 12 alpha-hydroxybufalin (2) and 7 beta,12 alpha-dihydroxybufalin (3) as the major metabolites, together with 7 beta-hydroxybufalin (4) and 12 beta-hydroxybufalin (5) in low yields. Two minor products were isolated from the culture broth of Mucor spinosus and were identified as 7 beta,15 alpha-dihydroxybufalin (6) and 5 beta,7 beta-dihydroxybufalin (7), respectively. Metabolites 2, 3, 6, and 7 are new compounds, and their structures were fully characterized by NMR and MS spectroscopy.
Cytochrome P450 Mining for Bufadienolide Diversification
作者:Xiaolai Lei、Xiaozheng Wang、Weiliang Xiong、Han Xiao、Yingchun Wu、Tingting Huang、Rubing Liang、Yiming Li、Shuangjun Lin
DOI:10.1021/acschembio.4c00089
日期:——
active bufadienolides with diverse modifications and trace content. In this work, based on the transcriptome and genome analyses, using a yeast-based screening platform, we obtained eight cytochrome P450 (CYP) enzymes from toads, which catalyze the hydroxylation of bufalin and resibufogenin at different sites. Moreover, a reported fungal CYP enzyme Sth10 was found functioning in the modification of bufalin
MODULATORS OF HYPOXIA INDUCIBLE FACTOR-1 AND RELATED USES FOR THE TREATMENT OF OCULAR DISORDERS
申请人:Bionaut Pharmaceuticals
公开号:EP1928470A2
公开(公告)日:2008-06-11
Modulators of Hypoxia Inducible Factor-1 and Related Uses for the Treatment of Ocular Disorders
申请人:Khodadoust Mehran
公开号:US20110076278A1
公开(公告)日:2011-03-31
Methods for treatment of ocular disorders using steroids modulate the effects of local and systemic hypoxic events mediated by hypoxia inducible factor-1 (HIF-1). Steroids that are useful as HIF-1 modulators include bufalin, digitoxigenin, digoxin, lanatoside C, strophantin K, uzarigenin, ouabain and proscillaridin. In some embodiments the ocular disorder is characterized by ischmia.
[EN] MODULATORS OF HYPOXIA INDUCIBLE FACTOR-1 AND RELATED USES FOR THE TREATMENT OF OCULAR DISORDERS<br/>[FR] MODULATEURS DU FACTEUR 1 INDUIT PAR HYPOXIE ET UTILISATIONS ASSOCIEES DANS LE TRAITEMENT DE TROUBLES OCULAIRES
申请人:BIONAUT PHARMACEUTICALS
公开号:WO2007016656A2
公开(公告)日:2007-02-08
(EN) Methods for treatment of ocular disorders using steroids modulate the effects of local and systemic hypoxic events mediated by hypoxia inducible factor- 1 (HIF-1). Steroids that are useful as HIF-1 modulators include bufalin, digitoxigenin, digoxin, lanatoside C, strophantin K, uzarigenin, ouabain and proscillaridin. In some embodiments the ocular disorder is characterized by ischmia.(FR) L'invention concerne des méthodes de traitement de troubles oculaires à l'aide de composés modulant les effets d'évènements hypoxiques locaux et systémiques.
Enzymatic Synthesis of Bufadienolide<i>O</i>-Glycosides as Potent Antitumor Agents Using a Microbial Glycosyltransferase
作者:Kai Li、Jin Feng、Yi Kuang、Wei Song、Meng Zhang、Shuai Ji、Xue Qiao、Min Ye
DOI:10.1002/adsc.201700777
日期:2017.11.10
significant cytotoxic activities against A549 and MCF7 human cancer cell lines, and showed potent inhibitory activities against Na+/K+‐ATPase with IC50 values in the range 0.053–0.76 μM. In particular, bufalin 3‐O‐β‐d‐glucoside showed enhanced water solubility (25‐fold increase from bufalin) and potentantitumor activities (30% inhibition rate, 1.4 mg kg−1, i.p.) on A549 human lung cancer xenograft Balb/c
丁二烯内酯是一类天然的强心类固醇,以其抗肿瘤活性而闻名。不良的水溶性阻碍了它们的临床应用。酶促糖基化是改善天然产物的溶解度的有利方法。在这项工作中,我们描述了高效的一步法合成布法地那利O-葡萄糖苷和O-半乳糖苷使用微生物糖基转移酶YjiC1,转化率从63%到99%。从14种底物中获得了总共24种糖苷,包括17种新化合物,并通过广泛的NMR和高分辨率电喷雾电离质谱(HR-ESI-MS)分析鉴定了它们的结构。这些产物属于五种类型:3β-OH,7β-OH,3β,7β-di-OH,11α-OH和12β-OH的糖基化。的C-7β或C-11α Ö bufadienolide的-glycosides报道首次。此外,3- O-糖苷对A549和MCF7人癌细胞系表现出显着的细胞毒活性,并显示出对Na + / K + -ATPase的有效抑制活性(IC 50)值在0.053-0.76μM范围内。特别是,bufalin