红树植物海杧果内生真菌Penicillium sp.中的抗菌活性成分

对红树植物海杧果内生真菌Penicillium sp.发酵液的乙酸乙酯提取物进行了柱层析分离, 得到3个化合物, 经MS, NMR, 1H-1H COSY, HMQC和HMBC等鉴定, 分别为4-(3-hydroxybutan-2-yl)-3,6-dimethylbenzene-1,2-diol(1), 4-(3-hydroxybutan-2-yl)-3-methyl-6-acetylbenzene-1,2-diol(2)和3,4,5-trimethyl-1,2-benzenediol(3). 其中化合物1和2为新化合物, 化合物3为新的天然产物. 抗菌活性测试结果表明, 化合物1和3均具有抗耐甲氧西林金黄色葡萄球菌的活性, 化合物2则未显示此活性.     

红树尖瓣海莲内生真菌Penicillium sp.J41221的代谢产物及其抗菌活性研究

在生物活性指导下,从一株来源于药用红树尖瓣海莲的内生真菌Penicillium sp.(J41221)中分离鉴定了6个化合物,包括4个四环三萜类化合物和2个甾醇类化合物,结构分别为:11-羰基-12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-2α,3β-二醇(1),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8-单烯-3β,11β-二醇(2),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-3β,11β-二醇(3),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-2α,3β,11β-三醇(4),啤酒甾醇(5)和(3β,5α,6β,22E)-6-甲氧基麦角甾-7,22-二烯-3,5-二醇(6).其中化合物1为首次从生物中获得,且1和2的波谱数据迄今未见任何报道.抗菌活性结果表明,化合物2和4对金黄色葡萄球菌、大肠杆菌和四联球菌均显示一定的抑制活性,最小抑菌浓度(MIC)分别为5和4.86μmol/L.     

云南美登木内生真菌Phomopsis sp.Lz42的化学成分

从云南美登木内生真菌Phomopsis species Lz42的琼脂平板发酵物中分离得到2个倍半萜和5个麦角甾醇类化合物(1~7), 其中化合物1和2为新化合物. 应用波谱技术确定其结构为4-Deacetyl-10-oxo-dihydrobotrydial(1)和麦角甾-6,22-二烯-5α,8α-环二氧-3-甲酸酯(2).     

南海红树林内生真菌cephalosporium sp.代谢产物

红树林内生真菌;代谢产物;cephalosporium sp.     

一株红树内生真菌Penicillium sp.(ZZF29#)次级代谢产物分离与鉴定

研究了一株药用红树内生真菌Penicillium sp.(ZZF29#)的次级代谢产物。用硅胶柱层析、制备薄层层析和重结晶等方法,从该菌发酵液的乙酸乙酯相中分离获得8种单体化合物,运用现代波谱技术并与文献数据对照,鉴定其结构分别为:环(苯丙-丙)二肽(1)、环(苯丙-甘)二肽(2)、环(苯丙-苯丙)二肽(3)、环(苯丙-酪)二肽(4)、大黄素(5)、大黄素甲醚(6)、麦角甾醇(7)和过氧化麦角甾醇(8)。     

FAAS法测定红树内生真菌Nigrospora sp.菌体中的微量元素

目的测定红树内生真菌Nigrospora sp.菌体中的微量元素。方法采用火焰原子吸收光谱法(FAAS)对湛江红树木榄内生真菌菌体中的Fe、Zn、Cu、Ca、Mg、Mn、Cd和Pb等微量元素进行了分析测定,结果发现其Fe、Zn、Cu、Ca、Mg和Mn等元素的含量都比较丰富,未检出Cd和Pb。数据显示相对标准偏差为0.30%～3.93%,回收率为96.8%～102.6%,结论该法快速、简单、结果可靠,为进一步对红树木榄内生真菌探讨研究提供更全面的分析数据。     

红树林植物尖瓣海莲内生真菌Penicillium sp.B21次级代谢产物的分离鉴定

研究了红树林植物尖瓣海莲叶内生真菌Penicillium sp.B21次级代谢产物。 用硅胶柱层析、制备薄层层析和重结晶等方法,从该菌发酵液的乙酸乙酯萃取相中首次分离获得5个单体化合物,运用现代波谱技术、单晶X射线衍射以及文献数据对照,鉴定其结构分别为8-羟基-6甲基-1-甲氧羰基酮(1)、大黄素(2)、ω-羟基大黄素(3)、(3R,4S)-6,8-二羟基-3,4,5-三甲基-3,4-二氢异香豆素(4)和3,6,8-三羟基-3,5,7-三甲基-3,4-二氢异香豆素(5)。 首次获得了sclerotinin B单晶结构。     

一株昆虫内生真菌Alternaria sp.次级代谢产物研究

采用硅胶柱色谱,Sephadex LH-20凝胶柱色谱及HPLC等方法从昆虫共生真菌Alternaria sp.(Be-1)的发酵液分离得到7个代谢产物,经NMR,MS及理化性质等确定为4个环肽和3个聚酮类化合物,4-甲氧基格链孢酚(1),5'-methoxy-6-methyl-biphenyl-3,4,3'-triol(2),altenusin(3),二氢腾毒素(4),腾毒素(5),环(4-羟基-脯-亮)二肽(6)和cyclo(L-Phenylalanine-trans-4-hydroxy-L-proline)(7)。测定了化合物1-7对抗肿瘤治疗靶点-受体酪氨酸激酶的抑制活性,药理实验结果表明,化合物1-6对三种酪氨酸激酶(EGFR,VEGFR-1,c-Met)具有不同程度的抑制活性,化合物1,3,6对EGFR,VEGFR-1,c-Met均具有强的抑制作用,而且化合物6还有选择性抑制EGFR和c-Met的活性。     

中国南海软珊瑚Scleronephthya sp.化学成分的研究

对中国南海的软珊瑚Scleronephthya sp.的化学成分进行研究,从有免疫调节活性的乙醚可溶物中分离鉴定了13个化合物,经1H NMR,13C NMR,HMQC,HMBC,1H-1H COSY和MS等光谱分析并结合文献数据,确证其结构分别为:3β-羟基-20-烯孕甾烷乙酸酯(1),3β-羟基-5,20-二烯孕甾烷乙酸酯(2),3-酮-20-烯孕甾烷(3),1,2-环氧-3-酮-20-烯孕甾烷(4),1,20-二烯-3-酮孕甾烷(5),1-烯-3-酮-20S-甲基-21-羟基孕甾烷乙酸酯(6),1-烯-3-酮-20β-羟基孕甾烷乙酸酯(7),1-烯-3,22-二酮胆甾烷(8),1,24-二烯-3-酮-22,23-二羟基胆甾烷(9),O-methylisogrifolin(10),(1R,3S,4S,7E,11E)-3α,4α-环氧-7,11,15-三烯西松烷(11),玉米黄素12和6-溴-3-羧酸吲哚(13),其中化合物4,6和10是首次从自然界分离得到.首次对化合物6,7和10的波谱数据进行了报道,而且利用2D NMR对其进行了全归属.对化合物1～7可能的生源关系也进行了探讨.化合物6和7对人宫颈癌细胞(HELA)有抑制活性,IC50分别为3.3和6.3 mol/L;化合物7对肝癌细胞(BE7402)和人白血病细胞(HL-60)也显示抑制活性,IC50分别为3.1和0.26mol/L;化合物11对COX-2显示强烈的抑制活性,IC50为0.455 mol/L.     

天麻内生真菌Penicillium skriabinii次生代谢产物研究

为研究兰科天麻属植物天麻(Gastrodia elata)块根中内生真菌(Penicillium skriabinii)的次生代谢产物,菌株采用固体发酵,发酵物用甲醇超声提取,综合运用硅胶柱色谱、LH-20羟丙基葡聚糖凝胶柱色谱(sephadex LH-20)及反相硅胶柱色谱等方法进行分离和纯化,得到12个单体化合物。根据化合物的理化性质及波谱数据鉴定其结构,分别为:preaustinoid A1(1),preaustinoid A2(2),1,2-dihydro-acetoxydehydroaustin(3),dehydroausin(4)、austin(5),verruculogen(6),(5aS,12S,14aS)-5a,6-dihydroxy-12-(2-hydroxy-2-methylpropyl)-9-methoxy-1,2,3,5a,6,14a-hexahydropyrrolo[1″,2″:4′,5′]pyrazino[1′,2′:1,6]pyrido[3,4-b]indole-5,14(11H,12H)-dione(7),cyclotryprostatin A(8),cyclo-L-tryptophyl-L-proline(9),6-methoxy-5(6)-dihydropenicillic acid(10),青霉酸(11)和β-谷甾醇(12)。     

A new polyoxygenated farnesylcyclohexenone from Fungus Penicillium sp.

A new polyoxygenated farnesylcyclohexenone, peniginsengin A (1), was isolated from the fermentation of Penicillium sp. YIM PH30003, an endophytic fungus associated with Panax notoginseng (Burk.) F. H. Chen. The structure was assigned based on a combination of 1 D and 2 D NMR and mass spectral data. The cytotoxicity and antimicrobial activities of compound 1 were investigated.     

Two new aromatic polyketides from a deep-sea fungus Penicillium sp. SCSIO 06720

Abstract

Two new compounds, 5-[2-hydroxypropane-1-yl]-2,6-dimethlbenzene-1,3-diol (1) and coniochaetone L (2), together with 19 known compounds (3–21), were isolated from a deep-sea fungus, Penicillium sp. SCSIO 06720. Their structures and absolute configurations were elucidated by detailed NMR, MS spectroscopic analyses, chiral-phase HPLC analysis, and electronic circular dichroism spectra. All the isolated compounds (1–21) were tested for their antibacterial and HIV latency-reversal activities. Among these compounds, compound 16 showed moderate antibacterial activities against Staphylococcus aureus ATCC 29213 and Methicillin-Resistant Staphylococcus Aureus-shh-1 with MIC values of 10.4?±?3.7?μg/mL and 46.9?±?29.7?μg/mL, respectively, which were comparable to that of the positive control ampicillin with MIC values of 0.5?±?0.4?μg/mL and 2.7?±?0.9?μg/mL, respectively.     

New Cytotoxic Metabolites from the Marine‐Derived Fungus Penicillium sp. ZLN29

One new penicillide derivative, prenpenicillide ( 1 ), and one new xanthone derivative, prenxanthone ( 2 ), were isolated from the culture extract of the marine‐derived fungus Penicillium sp. ZLN29, together with six known polyketide compounds, 3 – 8 . Their structures were elucidated on the basis of spectroscopic and spectrometric analyses. The cytotoxicities of these eight compounds were evaluated on four tumor‐cell lines by SRB (=sulforhodamine B) or MTT (=3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide) methods. Compounds 1 and 3 exhibited weak cytotoxicities against HepG2 cell line with IC₅₀ values of 9.9 and 9.7 μM , respectively.     

A mycophenolic acid derivative from the fungus Penicillium sp. SCSIO sof101

Abstract

Mycophenolic acid (MPA) is a group of metabolite derived from several species of Penicillium, which shows potent bioactivity. In this study, a new derivative of MPA compound named penicacid D (1), was isolated from the marine derived fungus Penicillium sp. SCSIO sof101, along with seven known compounds (2-8). Their structures were elucidated based on the HR-ESI-MS and NMR data. Moreover, the ¹H and ¹³C NMR data of compound 2 and the ¹³C NMR data of compound 3 are reported. Compounds 1, 4 and 6 exhibited weak activities against Escherichia coli (clinical isolation number 100385570) and Acinetobacter baumannii (clinical isolation number 100069).     

Diversified Chaetoglobosins from the Marine-Derived Fungus Emericellopsis sp. SCSIO41202

Two undescribed cytochalasins, emeriglobosins A (1) and B (2), together with nine previously reported analogues (3–11) and two known tetramic acid derivatives (12, 13) were isolated from the solid culture of Emericellopsis sp. SCSIO41202. Their structures, including the absolute configurations of their stereogenic carbons, were fully elucidated based on spectroscopic analysis and the calculated ECD. Some of the isolated compounds were evaluated for their cytotoxicity and enzyme inhibitory activity against acetylcholinesterase (AChE) in vitro. Among them, 8 showed potent AChE inhibitory activity, with an IC₅₀ value of 1.31 μM, and 5 showed significant cytotoxicity against PC-3 cells, with an IC₅₀ value of 2.32 μM.     

Penicindopene A,a new indole diterpene from the deep-sea fungus Penicillium sp. YPCMAC1

A new indole diterpene, named penicindopene A (1), together with seven known compounds (2?–?8), was isolated from the deep-sea fungus Penicillium sp. YPCMAC1. The structure of penicindopene A was elucidated by extensive spectroscopic analyses (1?D and 2?D NMR, and HRESIMS data), in addition to the ECD calculations for the assignments of its absolute configuration. Penicindopene A represented the first example of indole diterpenes possessing a 3-hydroxyl-2-indolone moiety, and it exhibited moderate cytotoxicities against A549 and HeLa cell lines with IC₅₀ values of 15.2 and 20.5?µM, respectively.     

Isolation and identification of two new compounds from the Penicillium sp. SYPF7381

Abstract

Two new compounds, (7R, 2E, 5E)-3,5,7-trimethyl-2,5-octadienedioic-8-methyl ester (1) and neovasipyridone G (3), together with a new natural product compound (7R,2E,5E)-3,5,7-trimethyl-2,5-octadienedioic acid (2), and six known compounds (4–9) were isolated from Penicillium sp. SYPF7381. Their structures were elucidated on the basis of extensive spectroscopic analysis, and the absolute configurations of compounds 1 and 2 were determined by optical rotation. The absolute configuration of compound 3 was determined by means of electronic circular dichroism (ECD) calculation. In addition, the in vitro anti-inflammatory activities of all compounds were assayed in RAW 264.7 cells by assessing LPS-induced NO production. Furthermore, the structure-antiinflammation activity relationships for these isolated compounds were summarized based on the experimental as well as the docking results.