深海曲霉属真菌Aspergillus insulicola的化学成分研究

目的 对深海沉积物来源真菌Aspergillus insulicola中的化学成分进行研究。方法 采用正反向硅胶柱色谱、高效液相色谱等方法对其大米发酵产物进行分离提纯;通过质谱、核磁共振等波谱学方法并结合文献数据鉴定其结构。结果 从海洋真菌A. insulicola大米发酵产物的乙酸乙酯提取物中共分离鉴定了9个化合物,其结构分别为：aspermicrone C(1)、aspermicrone B(2)、epicolactone(3)、F14945-C(4)、6,7-dihydroxy-5-methoxy-4-methylisobenzofuran-1(3H)-one(5)、5,6-dihydroxy-7- methoxy-4-methylisobenzo- furan-1(3H)-one(6)、3-methoxyepicoccone(7)、3,4-dihydroxyphenylacetic acid methyl ester(8)和glycerol-1- monooleate(9)。结论 化合物5为新的天然产物,其余化合物均为已知化合物。生物活性测试结果显示化合物1和2对火龙果黑斑病菌有一定的抑制作用。     

Antimicrobial aflatoxins from the marine-derived fungus Aspergillus flavus 092008

A new aflatoxin, aflatoxin B(2b) (1), together with six known compounds, were isolated from the marine-derived fungus Aspergillus flavus 092008 endogenous with the mangrove plant Hibiscus tiliaceus (Malvaceae). The structure of 1 was determined by the spectroscopic and chemical methods. Compound 1 exhibited a moderate antimicrobial activity against Escherichia coli, Bacillus subtilis and Enterobacter aerogenes, with MIC values of 22.5, 1.7 and 1.1 M, respectively. Compound 1 also showed a weak cytotoxicity against A549, K562 and L-02 cell lines, with IC(50) values of 8.1, 2.0 and 4.2 M, respectively. The results showed that hydration and hydrogenation of (8)-double bond significantly reduces the cytotoxicity of aflatoxins, while the esterification at C-8 increases the cytotoxicity.     

New mycotoxins from marine-derived fungus Aspergillus sp. SCSGAF0093

Nine mycotoxins including six aspergillic acid group toxins, aluminiumneoaspergillin (1), zirconiumneoaspergillin (2), aspergilliamide (3), ferrineoaspergillin (5), flavacol (6), neoaspergillic acid (7), and three ochratoxins, ochratoxin A n-butyl ester (4), ochratoxin A (8), ochratoxin A methyl ester (9), were isolated from the fermentation broth of marine gorgonian derived fungus Aspergillus sp. SCSGAF0093. Four of them (1–4) were new mycotoxins, and their structures were elucidated on the basis of spectroscopic analysis and chemical evidence. The bio-toxicity of compounds 1–9 were determined by brine shrimp lethality bioassay with median lethal concentration (LC₅₀) values of 2.59–205.67 μM. This was the first report about zirconium complex obtained from nature and ochratoxins isolated from marine environment.     

1株海洋真菌Aspergillus sp. WHUF0313次级代谢产物及其活性研究

摘要：目的 研究1株深海来源曲霉属真菌Aspergillus sp. WHUF0313的次级代谢产物及其生物活性。方法 采用硅胶柱 层析、Sephadex LH-20葡聚糖凝胶柱层析和半制备高效液相色谱等技术对该菌株的次级代谢产物分离纯化,并通过核磁共振 波谱(NMR)、质谱(MS)等方法,结合相关文献对比鉴定化合物结构;分别采用肉汤微量稀释检测法和MTS细胞增殖与毒性检 测法对化合物进行抗菌和肿瘤细胞毒活性测试。结果 从Aspergillus sp. WHUF0313的发酵产物共分离得到9个化合物,分别 为asperophiobolin G(1)、asperophiobolin F(2)、ophiobolin Q(3)、asperophiobolin H(4)、6-epi-ophiobolin G(5)、ophiobolin H(6)、 6-epi-ophiobolin K(7)、6-epi-21,21-O-dihydroophiobolin G(8)和asperophiobolin J(9)。结论 海洋真菌Aspergillus sp. WHUF0313能 产生多种活性次级代谢产物,化合物4对小鼠黑色素瘤B16有一定的细胞毒活性,化合物6和7具有较强的抗多重耐药幽门螺杆菌 和抗金黄色葡萄球菌活性,因此该菌具有开发为微生物源药物的潜在研究价值。     

A new diphenolic metabolite isolated from the marine-derived fungus Aspergillus niger 102

A new diphenolic derivative asperdiphenol A (1), along with nine known compounds (2–10), was isolated from the marine-derived fungus Aspergillus niger 102. Their structures were elucidated on the basis of spectroscopic analysis including NMR and MS spectrometry. Compound 1 was suggested to be a chiral mixture by the specific rotation and chiral HPLC. Compound 1 was evaluated for its anti-inflammatory, antibacterial, and cytotoxic activity.     

A new diphenyl ether from marine-derived fungus Aspergillus sp. B-F-2

A new diphenyl ether dimethyl 2,3'-dimethylosoate (1) together with three known compounds monomethylsulochrin (2), emodin (3), and questin (4) were isolated through bioassay-guided fractionations from the culture of a marine-derived fungus Aspergillus sp. B-F-2. The structures of these compounds were determined by spectroscopic methods. Cytotoxicities of compounds 1 and 2 against K562 cell line were preliminarily evaluated by the MTT method and flow cytometry.     

海洋真菌Aspergillus ruber CTD-5000-2中的吲哚二酮哌嗪生物碱研究

目的对海洋来源真菌Aspergillus ruber CTD-5000-2中的吲哚二酮哌嗪生物碱的结构多样性及抗氧化活性进行研究。方法利用硅胶、十八烷基硅烷键合硅胶(ODS)、半制备高效液相色谱(semi-HPLC)等色谱学方法对菌株发酵物中的吲哚二酮哌嗪生物碱进行分离;利用紫外(UV)、核磁共振波谱(NMR)、质谱(MS)等波谱学方法,结合与文献的数据对比确定化合物的结构。利用1,1-二苯基-2-三硝基苯肼(DPPH法)测试了化合物的抗氧化活性。结果从菌株发酵的乙酸乙酯提取物中分离鉴定了10个吲哚二酮哌嗪生物碱,分别为rubrumlines P(1)、neoechinulin B(2)、isoechinulin B(3)、neoechinulin C(4)、cryptoechinulin G(5)、tetrahydroechinulin(6)、neoechinulin A(7)、isoechinulin A(8)、variecolorin G(9)和dehydroechinulin(10)。Neoechinulin A(7)在0.1 mg·mL^?1浓度下对DPPH自由基的清除率为71.83%。结论从海洋真菌Aspergillus ruber中发现了10个二酮哌嗪类生物碱,报道了1个新颖的二酮哌嗪生物碱rubrumlines P(1)。同时发现这10个化合物具有一定的抗氧化活性。     

Three new chlorine containing antibiotics from a marine-derived fungus Aspergillus ostianus collected in Pohnpei

A marine bacterium Ruegeria atlantica (designated as strain TUF-D) was isolated from a glass plate submerged in the coastal water. Three new chlorine containing compounds (1 to approximately 3), together with penicillic acid (4) were obtained from a marine-derived fungus Aspergillus ostianus strain TUF 01F313 isolated from a marine sponge at Pohnpei as antibacterial components against R. atlantica. The structures of three new antibiotics were determined based on their spectral data as 8-chloro-9-hydroxy-8,9-deoxyasperlactone (1), 9-chloro-8-hydroxy-8,9-deoxyasperlactone (2), and 9-chloro-8-hydroxy-8,9-deoxyaspyrone (3). Compound 1 inhibited the growth of R. atlantica at 5 microg/disc (inhibition zone: 12.7 mm), while 2 and 3 were active at 25 microg/disc (10.1 and 10.5 mm, respectively).     

海洋真菌Aspergillus sp. SCS-KFD03化学成分研究

目的 对海洋真菌Aspergillus sp. SCS-KFD03的发酵液中化学成分进行分离鉴定,并测定其生物活性。 方法 采用硅胶柱色谱、Sephadex LH-20凝胶柱色谱和高效液相色谱等技术进行分离纯化,运用各种波谱方法对分离所得化合物进行结构鉴定,并测定化合物乙酰胆碱酯酶和α-糖苷酶抑制活性。结果 分离鉴定了9个化合物,经鉴定为phomaligol A1（1）、5-（乙酰氧基甲基）呋喃-3-酸（2）、 phomapyrone C（3）、4-羟基异苯并呋喃-1(3H)-酮（4）、penicillivinacine（5）、22(E)-5α,8α-epidioxyergosta-6,22-dien-3β-ol（6）、lucidal（7）、dankasterone A（8）、bis-(2-methylheptyl)-phthalate（9）,其中化合物4为新天然产物。化合物5、6、7和9具有较弱的乙酰胆碱酯酶抑制的活性,化合物5具有强于阳性药阿卡波糖的α-糖苷酶抑制活性,8和9的α-糖苷酶抑制活性与阳性药相当。结论 化合物1~9均为首次从海洋曲霉属真菌Aspergillus sp. SCS-KFD03中分离得到,部分化合物具有乙酰胆碱酯酶和α-糖苷酶的抑制活性。     

Two new 5-hydroxy-2-pyrone derivatives isolated from a marine-derived fungus Aspergillus flavus

Two new compounds, 4-(hydroxymethyl)-5-hydroxy-2H-pyran-2-one (1) and (5-hydroxy-2-oxo-2H-pyran-4-yl) methyl acetate (2), have been isolated from a marine-derived fungus Aspergillus flavus. Their structures were determined by spectroscopic data. Compound 1 induced the production of cAMP on GPR12 transfected CHO and HEK293 cells in a dose-dependent manner, which indicated 1 might be a possible ligand for GPR12.     

北极海洋来源真菌Aspergillus sp. HDN19-401次级代谢产物的研究

摘要：目的 研究北极海洋来源真菌Aspergillus sp. HDN19-401的次级代谢产物及其生物活性。方法 采用反相硅胶柱色 谱、葡聚糖凝胶Sephadex LH-20、半制备HPLC等方法分离纯化该菌株的发酵粗提物,通过ESI-MS、NMR等波谱数据分析并与 文献对比确定化合物的结构,最低抑菌浓度(minimal inhibitory concentration, MIC)采用微量肉汤稀释法测定,抗肿瘤活性采用 MTT法测定。结果与讨论 从Aspergillus sp. HDN19-401中分离得到9个化合物,通过对比核磁数据确定为：6-O-methylaverufin (1)、6,8-di-O-methylaverufin (2)、6,8-di-O-methylnidurufin (3)、aversin (4)、oxisterigmatocystin A (5)、oxisterigmatocystin B (6)、 fellutamide C (7)、notoamides B (8)、notoamides C (9),除化合物2外,其余均为首次从极地来源真菌中分离得到,化合物7对 K562细胞系具有中等的抑制活性,IC50值为7.78 μmol/L。     

Tetrahydrobostrycin and 1-deoxytetrahydrobostrycin, two new hexahydroanthrone derivatives, from a marine-derived fungus Aspergillus sp

Two new hexahydroanthrones, tetrahydrobostrycin (1) and 1-deoxytetrahydrobostrycin (2), were isolated from a marine-derived fungus Aspergillus sp. strain 05F16 collected at the coral reef of Manado, Indonesia, together with bostrycin and abscisic acid. The structures of new compounds were determined on the basis of their spectral data. Compound 1 showed weak antibacterial activity against Staphylococcus aureus and Escherichia coli and 2 against S. aureus.     

2-Methyl-versiquinazoline C,a new fumiquinazoline-type alkaloid from the fungus Aspergillus flavipes PJ03-11

A new fumiquinazoline-type alkaloid 2-methyl-versiquinazoline C (1), together with six known compounds (2–7), was isolated from Aspergillus flavipes PJ03-11 using OSMAC method. Their structures were elucidated on the basis of extensive spectroscopic analysis, and the absolute configuration of compound 1 was determined by the experimental and calculated ECD data. In addition, the cytotoxic activities against three human cancer cell lines (HL-60, THP-1, and PC-3) were evaluated.     

New destruxins from the marine-derived fungus Beauveria felina

Chemical investigation of the cytotoxic and anti-tuberculosis active butanone extract obtained from the growth media of the marine-derived fungus Beauveria felina led to the isolation of two new destruxins, [beta-Me-Pro] destruxin E chlorohydrin (1) and pseudodestruxin C (3), along with five known cyclic depsipeptides. The structures of the new destruxin derivatives were established by analysis of spectroscopic data, while the absolute configuration of the common amino acid residues was established by Marfey's analysis. The absolute configuration of the 2(R),4(S)-5-chloro-2,4-dihydroxypentanoic acid residue in 1 could be established by application of a J-based configuration method followed by derivatization with R-MPA-Cl and NMR analysis.     

Carbonarones A and B, new bioactive gamma-Pyrone and alpha-Pyridone derivatives from the marine-derived fungus Aspergillus carbonarius

Two new secondary metabolites, carbonarones A (1) and B (2), were obtained from the culture of the marine-derived fungus Aspergillus carbonarius isolated from the marine sediment collected at Weizhou island of China. Based on ESIMS, 1D and 2D NMR data, and the X-ray crystallographic analysis, their structures were elucidated as 6-benzyl-4-oxo-4H-pyran-3-carboxamide and 6-benzyl-4-hydroxy-2-oxo-1, 2-dihydropyridine-3-carbaldehyde, respectively. 1 and 2 showed moderate cytotoxicity against K562 cells with IC(50) values of 56.0 and 27.8 mug/ml, respectively.     

海洋真菌烟曲霉Aspergillus fumigatus YK-7次级代谢产物的分离鉴定及抗肿瘤活性

目的研究海洋真菌烟曲霉Aspergillus fumigatus YK-7次级代谢产物,以期获得活性先导化合物。方法采用硅胶柱色谱、ODS柱色谱、凝胶柱色谱、高效液相色谱等方法进行分离纯化,通过理化性质和波谱数据分析鉴定化合物的结构。采用台盼蓝法和MTT法进行抗肿瘤活性测试。结果从烟曲霉的真菌发酵液的乙酸乙酯萃取物和菌丝体的丙酮提取物中分离得到10个生物碱类化合物,分别鉴定为chaetominine(1)、(-)-11-epi-chaetominine(2)、fumiquinazoline A(3)、fumiquinazoline B(4)、fumiquinazoline C(5)、fumiquinazoline F(6)、fumiquinazoline G(7)、fumiquinazoline J(8)、bis-N-norgliovictin(9)、2-methylthio-cyclo(Phe-Ser)(10)。体外抗肿瘤活性测试结果显示,化合物3、6、7、8对人单核细胞白血病细胞(U937)的IC50值分别为87.1、16.4、33.3、8.6μmol·L~(-1);化合物8对人前列腺癌细胞(PC-3)的IC50值为58.5μmol·L~(-1)。结论化合物1、2为首次从海洋来源烟曲霉中分离得到。化合物3、6、7、8对选定的人肿瘤细胞U937和PC-3具有一定的体外抗增殖活性。     

Depsidones, aromatase inhibitors and radical scavenging agents from the marine-derived fungus Aspergillus unguis CRI282-03

Three new depsidones ( 1, 3, and 4), a new diaryl ether ( 5), and a new natural pyrone ( 9) (synthetically known), together with three known depsidones, nidulin ( 6), nornidulin ( 7), and 2-chlorounguinol ( 8), were isolated from the marine-derived fungus ASPERGILLUS UNGUIS CRI282-03. Aspergillusidone C ( 4) showed the most potent aromatase inhibitory activity with the IC (50) value of 0.74 μM, while depsidones 1, 3, 6- 8 inhibited aromatase with IC (50) values of 1.2-11.2 μM. It was found that the structural feature of depsidones, not their corresponding diaryl ether derivatives (e.g. 5), was important for aromatase inhibitory activity. Aspergillusidones A ( 1) and B ( 3) showed radical scavenging activity in the XXO assay with IC (50) values of 16.0 and < 15.6 μM, respectively. Compounds 1 and 3- 7 were mostly inactive or showed only weak cytotoxic activity against HuCCA-1, HepG2, A549, and MOLT-3 cancer cell lines.     

海洋来源真菌Penicillium citrinum中的一个新半缩醛类化合物(英文)

利用硅胶、Sephadex LH-20及半制备HPLC等柱色谱方法从一株海洋来源真菌Penicillium citrinum中分离得到了一个结构新颖的半缩醛类化合物(1)。通过高分辨电喷雾质谱、一维以及二维核磁等方法确定了它的平面和立体结构,同时,从核磁谱图中发现了化合物1在溶剂中是以互变异构体的形式存在的。在对人白血病细胞HL-60、人肺癌细胞A-549、人宫颈癌细胞HeLa以及人白血病细胞K562等4种细胞株的抗肿瘤活性筛选中,发现化合物1对人白血病细胞HL-60显示弱的抑制活性,其IC50值为77.4μmol·L-1。     

Neuraminidase inhibitory polyketides from the marine-derived fungus Phoma herbarum

Two new polyketides, arthropsadiol C (1) and massarilactone H (2), together with six known derivatives (3-8) were isolated from the culture broth of the marine-derived fungus Phoma herbarum. Their structures were elucidated on the basis of spectroscopic methods, including 2D?NMR techniques. Compounds 2, 4, 5, and 8 showed moderate neuraminidase inhibitory activity with IC(50) values ranging from 4.15 to 9.16?μM.