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Zhou Y, Ma S, Li X, Liu X, Gao J, Lü D, Wang Y, Zheng S. Synthesis and antifungal activity of hexahydropyrrolidoindole alkaloids. Nat Prod Res 2024:1-9. [PMID: 38529798 DOI: 10.1080/14786419.2024.2333047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/13/2024] [Indexed: 03/27/2024]
Abstract
Twenty-one hexahydropyrrolidoindole alkaloids were designed and synthesised via acylation reaction at the 3-N position from the commercially available indole-3-acetonitrile as the starting material in excellent yields. The effects of all target compounds against Verticillium dahlia, Fusarium oxysperium sp., Cytospora juglandis, Aspergillu sflavu, Aspergillus niger and Fusarium oxysporum were determined. The results of bioassays indicated that the majority of tested compounds displayed comparable or better in vitro bioactivity than the positive control. Notably, compounds 8 and 17 revealed potent activity against C. juglandis and A. sflavu, both with the same minimum inhibitory concentration value of 1.9 µg mL-1, which has fungicidal activity far exceeded that of amphotericin B and chlorothalonil.
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Affiliation(s)
- Yujie Zhou
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Shoude Ma
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Xiaohan Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Xinye Liu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jie Gao
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Dingding Lü
- School of Nursing, Zhenjiang College, Zhenjiang, China
| | - Ya Wang
- School of Nursing, Zhenjiang College, Zhenjiang, China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
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2
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Zhang Y, Meng Z, Li S, Liu T, Song J, Li J, Zhang X. Two Antimicrobial Peptides Derived from Bacillus and Their Properties. Molecules 2023; 28:7899. [PMID: 38067628 PMCID: PMC10708539 DOI: 10.3390/molecules28237899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/22/2023] [Accepted: 11/29/2023] [Indexed: 12/18/2023] Open
Abstract
Growth promotion and disease prevention are important strategies in the modern husbandry industry, and for this reason, antibiotics are widely used as animal feed additives. However, the overuse of antibiotics has led to the serious problem of increasing resistance of pathogenic microorganisms, posing a major threat to the environment and human health. "Limiting antibiotics" and "Banning antibiotics" have become the inevitable trends in the development of the livestock feed industry, so the search for alternative antimicrobial agents has become a top priority. Antimicrobial peptides (AMPs) produced by Bacillus spp. have emerged as a promising alternative to antibiotics, due to their broad-spectrum antimicrobial activity against resistant pathogens. In this study, two strains of Bacillus velezensis 9-1 and B. inaquosorum 76-1 with good antibacterial activity were isolated from commercial feed additives, and the antimicrobial peptides produced by them were purified by ammonium sulfate precipitation, anion exchange chromatography, gel chromatography, and RP-HPLC. Finally, two small molecule peptides, named peptide-I and peptide-II, were obtained from strain 9-1 and 76-1, respectively. The molecular weight and sequences of the peptides were analyzed and identified by LC-MS/MS, which were 988.5706 Da and VFLENVLR, and 1286.6255 Da and FSGSGSGTAFTLR, respectively. The results of an antibacterial activity and stability study showed that the two peptides had good antibacterial activity against Staphylococcus aureus, B. cereus, and Salmonella enterica, and the minimum inhibitory concentrations were 64 μg/mL and 16 μg/mL, 32 μg/mL and 64 μg/mL, and 8 μg/mL and 8 μg/mL, respectively. All of them have good heat, acid, and alkali resistance and protease stability, and can be further developed as feed antibiotic substitutes.
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Affiliation(s)
- Yujia Zhang
- College of Life Sciences, Hebei University, Baoding 071002, China; (Y.Z.); (Z.M.); (S.L.)
| | - Zinuo Meng
- College of Life Sciences, Hebei University, Baoding 071002, China; (Y.Z.); (Z.M.); (S.L.)
| | - Shilong Li
- College of Life Sciences, Hebei University, Baoding 071002, China; (Y.Z.); (Z.M.); (S.L.)
| | - Ting Liu
- The Laboratory and Pathology Department, The Hospital of 82nd Group Army PLA, Baoding 071001, China; (T.L.); (J.S.)
| | - Juan Song
- The Laboratory and Pathology Department, The Hospital of 82nd Group Army PLA, Baoding 071001, China; (T.L.); (J.S.)
| | - Jia Li
- College of Life Sciences, Hebei Agricultural University, Baoding 071001, China;
| | - Xiumin Zhang
- College of Life Sciences, Hebei University, Baoding 071002, China; (Y.Z.); (Z.M.); (S.L.)
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province, Hebei University, Baoding 071002, China
- Engineering Laboratory of Microbial Breeding and Preservation of Hebei Province, Hebei University, Baoding 071002, China
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3
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Zheng S, Wu W, Jiang Q, Lin C, Fang Y, Dai H, Tang B, Tan Y. Synthesis of novel naphthalene-chimonanthine scaffolds hybrids with potent antibacterial or antifungal activity. Nat Prod Res 2023; 37:3261-3266. [PMID: 37682697 DOI: 10.1080/14786419.2022.2067851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 04/10/2022] [Accepted: 04/13/2022] [Indexed: 10/18/2022]
Abstract
In this work, a total of 19 novel naphthalene hybrids with chimonanthine scaffolds were efficiently synthesised from indole-3-acetonitrile in good yields. The prepared compounds were evaluated for biological activity against Cryptococcus neoformans, Escherichia coli, Shigella spp, Candida albicans, Salmonella spp, and Staphylococcus aureus. The preliminary bioassays showed that most of the synthesised compounds exhibited significant antibacterial or antifungal activity. Notably, compound 8 showed potent activity against Cryptococcus neofonmans, Escherichia coli, Shigella spp, and Candida albicans than the positive control, all with the same MIC value of 3.53 µM. Compound 8 had a broad spectrum of antibacterial or antifungal activity, and will be studied further.
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Affiliation(s)
- Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Wenbin Wu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Qiaoju Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Chuansong Lin
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Yue Fang
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Huihui Dai
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Bing Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Yi Tan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
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4
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Alqahtani O, Stapleton P, Gibbons S. Production of antibacterial compounds using Bacillus spp. isolated from thermal springs in Saudi Arabia. Saudi Pharm J 2023; 31:1237-1243. [PMID: 37284417 PMCID: PMC10239688 DOI: 10.1016/j.jsps.2023.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/12/2023] [Indexed: 06/08/2023] Open
Abstract
Seventeen water samples were collected from four different thermal springs in Saudi Arabia. Microbiological assays were used to assess the antibacterial activities of bacterial colonies against antibiotic-resistant and susceptible-bacterial strains, and 16S rRNA gene sequencing was used to identify the genus and species of these antibiotic-producing bacteria. Chromatography and spectroscopy were used to separate the active compounds and help figuring out what their structures were. Four compounds were isolated using bacteria: N-acetyltryptamine (1), isovaleric acid (2), ethyl-4-ethoxybenzoate (3) and phenylacetic acid (4). Compounds 1, 2 and 4 were produced from Bacillus pumilus and 3 was from Bacillus licheniformis (AH-E1). The outcomes of the minimum inhibitory concentrations (MICs) showed that all pure compounds produced in this work had antibacterial activities against Gram-positive pathogens (between 128 mg/L and 512 mg/L compared to the control) and compound 2 had activity against E. coli.
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Affiliation(s)
- Omaish Alqahtani
- Department of Pharmacognosy, College of Pharmacy, Najran University, Najran, Saudi Arabia
- Research Department of Pharmaceutical and Biological Chemistry, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Paul Stapleton
- Research Department of Pharmaceutical and Biological Chemistry, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Simon Gibbons
- Centre for Natural Products Discovery (CNPD), Liverpool John Moores University, Liverpool L3 3AF, England, UK
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Zhu HX, Hu LF, Hu HY, Zhou F, Wu LL, Wang SW, Rozhkova T, Li CW. Identification of a Novel Streptomyces sp. Strain HU2014 Showing Growth Promotion and Biocontrol Effect Against Rhizoctonia spp. in Wheat. PLANT DISEASE 2023; 107:1139-1150. [PMID: 36190299 DOI: 10.1094/pdis-06-22-1493-re] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Wheat sharp eyespot is a serious disease caused by the phytopathogens Rhizoctonia cerealis and R. solani. Some species in the genus Streptomyces have been identified as potential biocontrol agents against phytopathogens. In this investigation, the physiological, biochemical, phylogenetic, and genomic characteristics of strain HU2014 indicate that it is a novel Streptomyces sp. most closely related to Streptomyces albireticuli. Strain HU2014 exhibited strong antifungal activity against R. cerealis G11 and R. solani YL-3. Ultraperformance liquid chromatography-mass spectrometry on the four extracts from the extracellular filtrate of strain HU2014 identified 10 chemical constituents in the Natural Products Atlas with high match levels (more than 90%). In an antifungal efficiency test on wheat sharp eyespot, two extracts significantly reduced the lesion areas on bean leaves infected by R. solani YL-3. The drenching of wheat in pots with spore suspension of strain HU2014 demonstrated a control efficiency of 65.1% against R. cerealis G11 (compared with 66.9% when treated by a 30% hymexazol aqueous solution). Additionally, in vitro and pot experiments demonstrated that strain HU2014 can produce indoleacetic acid, siderophores, extracellular enzymes, and solubilized phosphate, and it can promote plant growth. We conclude that strain HU2014 could be a valuable microbial resource for growth promotion of wheat and biological control of wheat sharp eyespot.
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Affiliation(s)
- Hong-Xia Zhu
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, China
- Henan Engineering Research of Crop Genome Editing, Xinxiang, China
- Henan International Joint Laboratory of Plant Genetic Improvement and Soil Remediation, Xinxiang, China
- Sumy National Agrarian University, Sumy, Ukraine
| | - Lin-Feng Hu
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, China
| | - Hai-Yan Hu
- Henan Engineering Research of Crop Genome Editing, Xinxiang, China
- Henan International Joint Laboratory of Plant Genetic Improvement and Soil Remediation, Xinxiang, China
| | - Feng Zhou
- Henan Engineering Research of Crop Genome Editing, Xinxiang, China
- Henan International Joint Laboratory of Plant Genetic Improvement and Soil Remediation, Xinxiang, China
| | - Liu-Liu Wu
- Henan Engineering Research of Crop Genome Editing, Xinxiang, China
- Henan International Joint Laboratory of Plant Genetic Improvement and Soil Remediation, Xinxiang, China
- Sumy National Agrarian University, Sumy, Ukraine
| | - Shi-Wen Wang
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, China
| | | | - Cheng-Wei Li
- Henan University of Technology, Zhengzhou, China
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Yang Y, Zhou Y, Jiang Q, Tan Y, Wu W, Han K, Zhu R, Zheng S. Synthesis and Structure–Activity Analysis of Novel Potential Antifungal Cyclotryptamine Alkaloid Derivatives. Molecules 2023; 28:molecules28062617. [PMID: 36985588 PMCID: PMC10053776 DOI: 10.3390/molecules28062617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/28/2023] [Accepted: 03/07/2023] [Indexed: 03/15/2023] Open
Abstract
A total of 39 novel cyclotryptamine alkaloid derivatives were prepared from 2-(1H-indol-3-yl) acetonitrile. The prepared compounds were evaluated against six plant pathogen fungi. Bioassay results revealed that most of the compounds displayed higher in vitro antifungal activities than the positive control. Notably, compound b2 displayed the broadest and most effective activity among the tested cyclotryptamine alkaloid derivatives and might be a novel potential leading compound for further development as an antifungal agent.
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7
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Synthesis and Antifungal Activity of Indole Derivatives. Chem Nat Compd 2023. [DOI: 10.1007/s10600-023-03929-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Ran Y, Zhang Y, Wang X, Li G. Nematicidal Metabolites from the Actinomycete Micromonospora sp. WH06. Microorganisms 2022; 10:microorganisms10112274. [PMID: 36422344 PMCID: PMC9693860 DOI: 10.3390/microorganisms10112274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/11/2022] [Accepted: 11/11/2022] [Indexed: 11/18/2022] Open
Abstract
A nematicidal actinomycete strain WH06 was isolated from soil samples and was identified using 16S rRNA as Micromonospora sp. Through medium screening and fermentation, 10 metabolites were isolated from the ethyl acetate extract of its fermentation broth using Sephadex LH-20 and silica gel column chromatography. These compounds were identified as N-acetyltyramine (1), N-acetyltryptamine (2), 1-methylhydantoin (3), benzenepropanoic acid (4), cyclo-(L-Pro-L-Tyr) (5), cyclo(L-Phe-Gly) (6), catechol (7), methyl (4-hydroxyphenyl)acetate (8), 3-hydroxybenzoic acid (9), and 4-hydroxybenzoic acid (10). In an in vitro assay against Meloidogyne incognita, a root-knot nematode, compounds 1, 4, 9, and 10 show nematicidal activity. Among them, benzenepropanoic acid (4) causes 99.02% mortality of nematode at 200 μg mL−1 after 72 h. Moreover, compound 4 also displays activity in inhibiting egg hatching of M. incognita. This suggests that Micromonospora sp. WH06 is a promising candidate for biocontrol of M. incognita.
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9
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Shi JY, Wang CF, Xie MM, Hao YJ, Wang N, Ma H, Yang XW. Brefeldin A from the Deep-Sea-Derived Fungus Fusarium sp. Targets on RIPK3 to Inhibit TNFα-Induced Necroptosis. Chem Biodivers 2022; 19:e202200696. [PMID: 36000162 DOI: 10.1002/cbdv.202200696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 08/23/2022] [Indexed: 11/08/2022]
Abstract
From the deep-sea-derived Fusarium sp. ZEN-48, four known compounds were obtained. Their structures were established by extensive analyses of the NMR, HRESIMS, and the X-ray crystal-lographic data as brefeldin A (BFA, 1), brevianamide F (2), N-acetyltryptamine (3), and (+)-diaporthin (4). Although BFA was extensively investigated for its potent bioactivities, its role on TNFα-induced necroptosis was incompletely understood. In this study, BFA showed significant inhibition on TNFα-induced necroptosis by disrupting the necrosome formation and suppressing the phosphorylation of RIPK3 and MLKL (IC50 = 0.5 μM). While, it had no effect on TNFα-induced NF-κB/MAPKs activation and apoptosis. The finding raised significant implications of BFA for necroptosis-related inflammatory disease therapy and new drug development from marine fungi.
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Affiliation(s)
- Jia-Yi Shi
- Ningbo University, Institute of Drug Discovery Technology, 818 Fenghua Road, Ningbo, CHINA
| | - Chao-Feng Wang
- Third Institute of Oceanography Ministry of Natural Resources, Key Laboratory of Marine Biogenetic Resources, Daxue Road, 361005, Xiamen, CHINA
| | - Ming-Min Xie
- Third Institute of Oceanography Ministry of Natural Resources, Key Laboratory of Marine Biogenetic Resources, 184 Daxue Road, 361005, Xiamen, CHINA
| | - You-Jia Hao
- Third Institute of Oceanography Ministry of Natural Resources, Key Laboratory of Marine Biogenetic Resources, 184 Daxue Road, Xiamen, CHINA
| | - Ning Wang
- Ningbo University, Institute of Drug Discovery Technology, 818 Fenghua Road, Xiamen, CHINA
| | - Huabin Ma
- Ningbo University, Institute of Drug Discovery Technology, 818 Fenghua Road, Xiamen, CHINA
| | - Xian-Wen Yang
- Third Institute of Oceanography, Ministry of Natural Resources, Key Laboratory of Marine Biogenetic Resources, 184 Daxue Road, 361005, Xiamen, CHINA
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10
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Le KD, Yu NH, Park AR, Park DJ, Kim CJ, Kim JC. Streptomyces sp. AN090126 as a Biocontrol Agent against Bacterial and Fungal Plant Diseases. Microorganisms 2022; 10:microorganisms10040791. [PMID: 35456841 PMCID: PMC9025191 DOI: 10.3390/microorganisms10040791] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/02/2022] [Accepted: 04/05/2022] [Indexed: 02/01/2023] Open
Abstract
Bacteria and fungi are major phytopathogens which substantially affect global agricultural productivity. In the present study, Streptomyces sp. AN090126, isolated from agricultural suppressive soil in Korea, showed broad-spectrum antagonistic activity against various phytopathogenic bacteria and fungi. In the 96-well plate assay, the fermentation filtrate of Streptomyces sp. AN090126 exhibited antimicrobial activity, with a minimum inhibitory concentration (MIC) of 0.63–10% for bacteria and 0.63–3.3% for fungi. The MIC of the partially purified fraction was 20.82–250 µg/mL for bacteria and 15.6–83.33 µg/mL for fungi. Gas chromatography–mass spectrometry (GC-MS) analysis revealed that AN090126 produced various volatile organic compounds (VOCs), including dimethyl sulfide and trimethyl sulfide, which inhibited the growth of pathogenic bacteria and fungi in in vitro VOC assays. In pot experiments, the fermentation broth of Streptomyces sp. AN090126 reduced tomato bacterial wilt caused by Ralstonia solanacearum, red pepper leaf spot caused by Xanthomonas euvesicatoria, and creeping bentgrass dollar spot caused by Sclerotinia homoeocarpa in a dose-dependent manner. Moreover, the secondary metabolites derived from this strain showed a synergistic effect with streptomycin sulfate against streptomycin-resistant Pectobacterium carotovorum subsp. carotovorum, the causative agent of Kimchi cabbage soft rot, in both in vitro and in vivo experiments. Therefore, Streptomyces sp. AN090126 is a potential biocontrol agent in controlling plant diseases caused by pathogenic bacteria and fungi, specifically by the streptomycin-resistant strains.
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Affiliation(s)
- Khanh Duy Le
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonam National University, Gwangju 61186, Korea; (K.D.L.); (N.H.Y.); (A.R.P.)
- Institute of New Technology, Academy of Military Science and Technology, 17 Hoangsam, Caugiay, Hanoi 100000, Vietnam
| | - Nan Hee Yu
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonam National University, Gwangju 61186, Korea; (K.D.L.); (N.H.Y.); (A.R.P.)
| | - Ae Ran Park
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonam National University, Gwangju 61186, Korea; (K.D.L.); (N.H.Y.); (A.R.P.)
| | - Dong-Jin Park
- Industrial Bio-Materials Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea; (D.-J.P.); (C.-J.K.)
| | - Chang-Jin Kim
- Industrial Bio-Materials Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea; (D.-J.P.); (C.-J.K.)
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonam National University, Gwangju 61186, Korea; (K.D.L.); (N.H.Y.); (A.R.P.)
- Correspondence:
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Tan Y, Jiang Q, Lin C, Fang Y, Dai H, Tang B, Wu W, Zheng S. Synthesis and antifungal activity of novel chiral indole analogues. Nat Prod Res 2022:1-7. [PMID: 35212249 DOI: 10.1080/14786419.2022.2042533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Starting from L-tryptophan, 19 new N-substituted chiral indole analogs were synthesized. The prepared compounds were evaluated for biological activity against Sclerotinia sclerotiorum, Alternaria solani, Verticillium dahliae, Colletotrichum orbiculare, Cytospora juglandis and Curvularia lunata. The preliminary bioassays showed that most of the synthesized compounds exhibited fungicidal activity. Compound b13 in particular exhibited significant antifungal activity against Verticillium dahliae and Sclerotinia sclerotiorum, with the MIC value of 1.95 µg mL-1. Compound b13 also showed excellent activity against six plant pathogen fungi, and was identified as the most active on the biological assays, and will be studied further.
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Affiliation(s)
- Yi Tan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Qiaoju Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Chuansong Lin
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Yue Fang
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Huihui Dai
- Shanghai Shipbuiding Technology Research Institute Zhoushan Ship Engineering Research Center, Zhoushan, Zhejiang, China
| | - Bing Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Wenbin Wu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
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12
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Effects of rare earth elements on bacteria in rhizosphere, root, phyllosphere and leaf of soil-rice ecosystem. Sci Rep 2022; 12:2089. [PMID: 35136105 PMCID: PMC8826409 DOI: 10.1038/s41598-022-06003-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 01/21/2022] [Indexed: 11/08/2022] Open
Abstract
The effects of rare earth mining on rice biomass, rare earth element (REE) content and bacterial community structure was studied through pot experiment. The research shows that the REE content in rice roots, shoots and grains was significantly positive correlated with that in soil, and the dry weight of rice roots, shoots and grains was highly correlated with soil physical and chemical properties, nutrient elements and REE contents; The exploitation of rare earth minerals inhibited a-diversity of endophytic bacteria in rhizosphere, root, phyllosphere and leaf of rice, significantly reduced the abundance index, OTU number, Chao, Ace index and also significantly reduced the diversity index-Shannon index, and also reduced uniformity index: Pielou's evenness index, which caused β-diversity of bacteria to be quite different. The exploitation of rare earth minerals reduces the diversity of bacteria, but forms dominant bacteria, such as Burkholderia, Bacillus, Buttiauxella, Acinetobacter, Bradyrhizobium, Candida koribacter, which can degrade the pollutants formed by exploitation of rare earth minerals, alleviate the compound pollution of rare earth and ammonia nitrogen, and also has the function of fixing nitrogen and resisting rare earth stress; The content of soil available phosphorus in no-mining area is lower, and the dominant bacteria of Pantoea formed in such soil, which has the function of improving soil phosphorus availability. Rare earth elements and physical and chemical properties of soil affect the community structure of bacteria in rhizosphere and phyllosphere of rice, promote the parallel movement of some bacteria in rhizosphere, root, phyllosphere and leaf of rice, promote the construction of community structure of bacteria in rhizosphere and phyllosphere of rice, give full play to the growth promoting function of Endophytes, and promote the growth of rice. The results showed that the exploitation of rare earth minerals has formed the dominant endophytic bacteria of rice and ensured the yield of rice in the mining area, however, the mining of mineral resources causes the compound pollution of rare earth and ammonia nitrogen, which makes REE content of rice in mining area significantly higher than that in non-mining area, and the excessive rare earth element may enter the human body through the food chain and affect human health, so the food security in the REE mining area deserves more attention.
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Abstract
The COVID-19 pandemic has highlighted the need to identify additional antiviral small molecules to complement existing therapies. Although increasing evidence suggests that metabolites produced by the human microbiome have diverse biological activities, their antiviral properties remain poorly explored. Using a cell-based SARS-CoV-2 infection assay, we screened culture broth extracts from a collection of phylogenetically diverse human-associated bacteria for the production of small molecules with antiviral activity. Bioassay-guided fractionation uncovered three bacterial metabolites capable of inhibiting SARS-CoV-2 infection. This included the nucleoside analogue N6-(Δ2-isopentenyl)adenosine, the 5-hydroxytryptamine receptor agonist tryptamine, and the pyrazine 2,5-bis(3-indolylmethyl)pyrazine. The most potent of these, N6-(Δ2-isopentenyl)adenosine, had a 50% inhibitory concentration (IC50) of 2 μM. These natural antiviral compounds exhibit structural and functional similarities to synthetic drugs that have been clinically examined for use against COVID-19. Our discovery of structurally diverse metabolites with anti-SARS-CoV-2 activity from screening a small fraction of the bacteria reported to be associated with the human microbiome suggests that continued exploration of phylogenetically diverse human-associated bacteria is likely to uncover additional small molecules that inhibit SARS-CoV-2 as well as other viral infections. IMPORTANCE The continued prevalence of COVID-19 and the emergence of new variants has once again put the spotlight on the need for the identification of SARS-CoV-2 antivirals. The human microbiome produces an array of small molecules with bioactivities (e.g., host receptor ligands), but its ability to produce antiviral small molecules is relatively underexplored. Here, using a cell-based screening platform, we describe the isolation of three microbiome-derived metabolites that are able to prevent SARS-CoV-2 infection in vitro. These molecules display structural similarities to synthetic drugs that have been explored for the treatment of COVID-19, and these results suggest that the microbiome may be a fruitful source of the discovery of small molecules with antiviral activities.
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15
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Zhu R, Wei Y, Han K, Shi XW, Gu YD, Bai HJ, Zheng SJ. Synthesis and biological profiling of half-calycanthaceous alkaloid analogues. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:859-865. [PMID: 32686494 DOI: 10.1080/10286020.2020.1791100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/23/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
During our continuous efforts to pursue antifungal agents, some calycanthaceous alkaloid analogs showed diverse and promising bioactivities. Therefore, 34 new calycanthaceous alkaloid derivatives were further prepared and screened for bioactivities. As a result of the evaluation against a great deal of plant pathogen fungi, bacteria and human pathogenic fungi, a majority of them displayed potent bioactivity. In particular, compound b6 displayed remarkably activity and might be novel potential leading compound for further development of antifungal agent. The relationship between structure and biological activity was also discussed.
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Affiliation(s)
- Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yang Wei
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Ke Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Xin-Wei Shi
- Engineering Center of Qinling Mountains Natural Products, Shaanxi Academy of Sciences, Institute of Botany of Shaanxi Province, Xi'an 710061, China
| | - Yong-Dong Gu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Hong-Jin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps/College of Life Sciences, Tarim University, Alar 843300, China
| | - Shao-Jun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
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16
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Zhu R, Yang C, Han K, Gu Y, Zhang J, Zheng S, Bai H. Synthesis and Antimicrobial Activity of Calycanthaceous Derivatives. Nat Prod Commun 2021. [DOI: 10.1177/1934578x211032611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A series of calycanthaceous alkaloid analogs have been synthesized in excellent yields. All the target compounds were evaluated in vitro for biological activity against a broad range of plant pathogen fungi, bacteria and human pathogenic fungi, and some of the designed compounds exhibited potential activity in the primary assays. Notably, Compound b7 illustrated higher degrees of activity against Aspergillu sflavu than amphotericin B, with a minimal inhibitory concentration value of 15.63 µg·mL−1. Compound b7 displayed the most effective activity among the tested calycanthaceous analogs and might be a novel potential leading compound for further development of antifungal agent.
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Affiliation(s)
- Rui Zhu
- Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps/School of Chemistry and Chemical Engineering, Tarim University, Xinjiang, China
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Cheng Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Ke Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Yongdong Gu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Shaanxi, China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Hongjin Bai
- Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps/School of Chemistry and Chemical Engineering, Tarim University, Xinjiang, China
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17
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Ramlawi S, Abusharkh S, Carroll A, McMullin DR, Avis TJ. Biological and chemical characterization of antimicrobial activity in Arthrobacter spp. isolated from disease-suppressive compost. J Basic Microbiol 2021; 61:745-756. [PMID: 34228381 DOI: 10.1002/jobm.202100213] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/12/2021] [Accepted: 06/18/2021] [Indexed: 01/06/2023]
Abstract
Antagonistic bacteria can act as biocontrol agents against various phytopathogens. Recently, Arthrobacter spp. demonstrated antifungal activity, but were not further characterized. In this study, the antimicrobial activity of Arthrobacter humicola strains M9-1A, M9-2, and M9-8, and Arthrobacter psychrophenolicus strain M9-17 were evaluated against nine plant pathogens in vitro, and their cell-free filtrates were additionally assessed for inhibition of Alternaria alternata and suppression of black mold disease on tomato fruit. Results indicated that A. humicola M9-1A and A. psychrophenolicus M9-17 were the most inhibitory, reducing growth of seven of the pathogens studied. Cell-free filtrates of A. psychrophenolicus M9-17 reduced the growth of most pathogens. All cell-free bacterial filtrates, except those from A. humicola M9-2, suppressed black mold on tomato fruit. Disk diffusion assays with ethyl acetate soluble culture filtrate extracts of all bacteria reduced the mycelial growth of A. alternata. Clear inhibition zones were observed for A. psychrophenolicus M9-17 extracts using drop bioassays. The antifungal compound N-acetyltryptamine was purified and characterized from the A. psychrophenolicus M9-17 cell-free ethyl acetate soluble extract. This study suggests that antibiosis may play a key role in the antimicrobial activity of Arthrobacter spp.
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Affiliation(s)
- Serine Ramlawi
- Department of Chemistry, Carleton University, Ontario, Canada
| | | | - Alexa Carroll
- Department of Chemistry, Carleton University, Ontario, Canada
| | - David R McMullin
- Department of Chemistry, Carleton University, Ontario, Canada.,Institute of Biochemistry, Carleton University, Ontario, Canada
| | - Tyler J Avis
- Department of Chemistry, Carleton University, Ontario, Canada.,Institute of Biochemistry, Carleton University, Ontario, Canada
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18
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Hui MLY, Tan LTH, Letchumanan V, He YW, Fang CM, Chan KG, Law JWF, Lee LH. The Extremophilic Actinobacteria: From Microbes to Medicine. Antibiotics (Basel) 2021; 10:682. [PMID: 34201133 PMCID: PMC8230038 DOI: 10.3390/antibiotics10060682] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/31/2021] [Accepted: 06/03/2021] [Indexed: 12/24/2022] Open
Abstract
Actinobacteria constitute prolific sources of novel and vital bioactive metabolites for pharmaceutical utilization. In recent years, research has focused on exploring actinobacteria that thrive in extreme conditions to unearth their beneficial bioactive compounds for natural product drug discovery. Natural products have a significant role in resolving public health issues such as antibiotic resistance and cancer. The breakthrough of new technologies has overcome the difficulties in sampling and culturing extremophiles, leading to the outpouring of more studies on actinobacteria from extreme environments. This review focuses on the diversity and bioactive potentials/medically relevant biomolecules of extremophilic actinobacteria found from various unique and extreme niches. Actinobacteria possess an excellent capability to produce various enzymes and secondary metabolites to combat harsh conditions. In particular, a few strains have displayed substantial antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA), shedding light on the development of MRSA-sensitive antibiotics. Several strains exhibited other prominent bioactivities such as antifungal, anti-HIV, anticancer, and anti-inflammation. By providing an overview of the recently found extremophilic actinobacteria and their important metabolites, we hope to enhance the understanding of their potential for the medical world.
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Affiliation(s)
- Martha Lok-Yung Hui
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (M.L.-Y.H.); (L.T.-H.T.); (V.L.)
| | - Loh Teng-Hern Tan
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (M.L.-Y.H.); (L.T.-H.T.); (V.L.)
- Clinical School Johor Bahru, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Johor Bahru 80100, Malaysia
| | - Vengadesh Letchumanan
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (M.L.-Y.H.); (L.T.-H.T.); (V.L.)
| | - Ya-Wen He
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200030, China;
| | - Chee-Mun Fang
- Division of Biomedical Sciences, School of Pharmacy, University of Nottingham Malaysia, Semenyih, Selangor 43500, Malaysia;
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
- International Genome Centre, Jiangsu University, Zhenjiang 212013, China
- Faculty of Applied Sciences, UCSI University, Kuala Lumpur 50600, Malaysia
| | - Jodi Woan-Fei Law
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (M.L.-Y.H.); (L.T.-H.T.); (V.L.)
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group (NBDD), Microbiome and Bioresource Research Strength (MBRS), Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway 47500, Malaysia; (M.L.-Y.H.); (L.T.-H.T.); (V.L.)
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Zhu R, Guo R, Han K, Xi W, Zheng S, Zhang J. Synthesis and Antimicrobial Characterization of Luotonin Derivatives. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20952750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Twenty-one novel luotonin derivatives were synthesized from 2-aminobenzamide in excellent yields. The prepared compounds, when tested against 8 strains of bacteria and many plant pathogen fungi showed diverse and promising antimicrobial activities. Notably, compounds a5, a9, b4, and b5 demonstrated good activities and might be potential lead compounds for further development as antifungal agents. The relationship between structure and biological activity is also discussed.
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Affiliation(s)
- Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China
| | - Rui Guo
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Northwest A&F University, Yangling, Shaanxi Province, P. R. China
| | - Ke Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China
| | - Wenying Xi
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Northwest A&F University, Yangling, Shaanxi Province, P. R. China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Northwest A&F University, Yangling, Shaanxi Province, P. R. China
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20
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Zheng S, Zhu R, Tang B, Chen L, Bai H, Zhang J. Synthesis and biological evaluations of a series of calycanthaceous analogues as antifungal agents. Nat Prod Res 2019; 35:1816-1824. [PMID: 31378086 DOI: 10.1080/14786419.2019.1644635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Starting from indole-3-acetonitrile, a total of 66 new calycanthaceous alkaloid analogues were synthesised in excellent yields. The prepared compounds were evaluated for their biological activities against a broad range of plant pathogen fungi. The results of bioassays indicated that the majority of tested compounds displayed comparable or better in vitro bioactivities than the positive control. Notably, Compound a1 displayed a significant activities against B. cereus, Escherichia sp and R. solanacearum, even better than the positive control streptomycin and Penicillin, with the same MIC value of 15.63 µg mL-1. Compound a1 displayed a broad spectrum and remarkably activities among the tested calycanthaceous analogues and might be a novel potential leading compound for further development of antifungal agents. The results obtained in the study will be very helpful for further design and structural optimisation of calycanthaceous alkaloids as potential agrochemical lead for plant disease control.
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Affiliation(s)
- Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Bing Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Lizhuang Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Hongjin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps/College of Life Sciences, Tarim University, Alar, Xinjiang, China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling, Shaanxi, China
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21
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Gang FL, Zhu F, Li XT, Wei JL, Wu WJ, Zhang JW. Synthesis and bioactivities evaluation of l-pyroglutamic acid analogues from natural product lead. Bioorg Med Chem 2018; 26:4644-4649. [DOI: 10.1016/j.bmc.2018.07.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/22/2018] [Accepted: 07/24/2018] [Indexed: 10/28/2022]
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22
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Song H, Wu H, Li S, Tian H, Li Y, Wang J. Homogeneous Synthesis of Cationic Chitosan via New Avenue. Molecules 2018; 23:E1921. [PMID: 30071648 PMCID: PMC6222707 DOI: 10.3390/molecules23081921] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/20/2018] [Accepted: 07/24/2018] [Indexed: 01/22/2023] Open
Abstract
Using a solvent formed of alkali and urea, chitosan was successfully dissolved in a new solvent via the freezing⁻thawing process. Subsequently, quaternized chitosan (QC) was synthesized using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) as the cationic reagent under different incubation times and temperatures in a homogeneous system. QCs cannot be synthesized at temperatures above 60 °C, as gel formation will occur. The structure and properties of the prepared QC were characterized and quaternary groups were comfirmed to be successfully incorporated onto chitosan backbones. The degree of substitution (DS) ranged from 16.5% to 46.8% and the yields ranged from 32.6% to 89.7%, which can be adjusted by changing the molar ratio of the chitosan unit to CHPTAC and the reaction time. QCs inhibits the growth of Alicyclobacillus acidoterrestris effectively. Thus, this work offers a simple and green method of functionalizing chitosan and producing quaternized chitosan with an antibacterial effect for potential applications in the food industry.
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Affiliation(s)
- Huanlu Song
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Hao Wu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China.
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - ShuJing Li
- Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University, Beijing 100048, China.
| | - Huafeng Tian
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - YanRu Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - JianGuo Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China.
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
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23
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24
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Antibacterial Activity and Composition of the Fermentation Broth of Streptomyces Parvus 33. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.12677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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25
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Zheng S, Li L, Wang Y, Zhu R, Bai H, Zhang J. Synthesis and Antimicrobial Activity of Calycanthaceous Alkaloid Analogues. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601101004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of 24 novel derivatives of the calycanthaceous alkaloids with a tetrahydropyrroloindol-based core structure was synthesized from tryptophan in good yields. Their structures were characterized by IR, 1H NMR, and 13C NMR spectroscopy and ESI-MS. The synthesized compounds were evaluated against a wide variety of plant pathogenic fungi. Compound a9 exhibited a high degree of activity against Curvularia lunata, with 91.0% activity at a concentration of 100 μg mL−1 and with an EC50 of 44.6 μg mL−1. a7, a8, a13, and a17 exhibited high degrees of activity against Sclerotinia sclerotiorum, with a8 being the most effective with an EC50 of 38.4 μg mL−1. Compound a9 illustrated activity against Botrytis cinerea, with an EC50 of 79.5 μg mL−1. Considering the compounds evaluated, the alkyl substituents of the chain may contribute to the significant variations in fungicidal potency. The structure antifungal activity relationships are also discussed. These results will pave the way for further design, structural modification, and development of calycanthaceous alkaloids as antimicrobial agents.
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Affiliation(s)
- Shaojun Zheng
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps / College of Life Sciences, Tarim University, Alar Xinjiang 843300, P. R. China
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Longbo Li
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling 712100, Shaanxi Province, P. R. China
| | - Yu Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Hogjin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps / College of Life Sciences, Tarim University, Alar Xinjiang 843300, P. R. China
| | - Jiwen Zhang
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps / College of Life Sciences, Tarim University, Alar Xinjiang 843300, P. R. China
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling 712100, Shaanxi Province, P. R. China
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26
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Zheng S, Gu Y, Li L, Zhu R, Cai X, Bai H, Zhang J. Synthesis and fungicidal activity of tryptophan analogues – the unexpected calycanthaceous alkaloid derivatives. Nat Prod Res 2016; 31:1142-1149. [DOI: 10.1080/14786419.2016.1230117] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
- Collaborative Innovation Center of Ship Technology in Jiangsu Colleges and Universities/Marine Equipment and Technology Institute for Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Yongdong Gu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Longbo Li
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling, P.R. China
| | - Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. China
| | - Hongjin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps/College of Life Sciences, Tarim University, Alar, P.R. China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling, P.R. China
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27
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Efficient Synthesis and Antibacterial Evaluation of (±)-Yanglingmycin and Its Analogues. Molecules 2016; 21:96. [PMID: 26784161 PMCID: PMC6273348 DOI: 10.3390/molecules21010096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 12/30/2015] [Accepted: 01/12/2016] [Indexed: 12/31/2022] Open
Abstract
An efficient synthetic route was developed for the large-scale preparation of (±)-Yanglingmycin and its analogues. Three series of derivatives of (±)-Yanglingmycin were synthesized and the structures of all compounds were elucidated by analyses of NMR and ESI-MS spectra data. Moreover, their antibacterial activities against seven species of bacteria were systematically evaluated by the micro-broth dilution method, most of which displayed considerable activity. It was worth noting that compounds 5b, 5c, 5d, 6g, and 7 were found to be the most promising leading candidates, with peak MIC values of 0.98 μg·mL−1 for Bacillus subtilis, which is superior to positive controls (MIC = 3.91 μg·mL−1). The above results might lay the firm foundation for the design and synthesis of novel antibacterial drugs based on (±)-Yanglingmycin.
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28
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Shrivastava P, Kumar R, Yandigeri MS. In vitro biocontrol activity of halotolerant Streptomyces aureofaciens K20: A potent antagonist against Macrophomina phaseolina (Tassi) Goid. Saudi J Biol Sci 2015; 24:192-199. [PMID: 28053590 PMCID: PMC5199003 DOI: 10.1016/j.sjbs.2015.12.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 11/09/2015] [Accepted: 12/19/2015] [Indexed: 11/04/2022] Open
Abstract
A halotolerant actinobacterial strain isolated from salinity affected soil of Eastern Indo-Gangetic plains (IGP), Uttar Pradesh, India, was characterised for its antagonistic potential against Macrophomina phaseolina by dual-culture assay. It was shown to effectively inhibit the growth of M. phaseolina with an inhibition zone of 27 ± 1.33 mm. Further the actinobacterial strain was evaluated for its plant growth promoting (PGP) properties and its ability to produce biocontrol related extracellular enzymes viz. amylase, protease, cellulase, chitinase, gelatinase and urease. The results revealed that the actinobacterial strain had PGP potential along with positive assay for amylase, chitinase and urease. The interaction study between antagonist strain and fungal pathogen, performed by scanning electron microscopy technique revealed that the actinobacterium was able to damage fungal mycelia may be due to chitinase, establishing its role as a potential antagonist against M. phaseolina. The actinobacterial isolate was characterised by 16S rDNA gene sequencing, and was identified as Streptomyces genera. The identified gene sequence was deposited to NCBI GenBank with an accession number KP331758.
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Affiliation(s)
- P Shrivastava
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University (A Central Unversity), Lucknow 226025, Uttar Pradesh, India
| | - R Kumar
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University (A Central Unversity), Lucknow 226025, Uttar Pradesh, India
| | - M S Yandigeri
- National Bureau of Agricultural Insect Resources, H.A. Farm Post, Bellary Road, Bengaluru 560024, India
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29
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Design and Synthesis of New 2-Aryl-4,5-Dihydro-thiazole Analogues: In Vitro Antibacterial Activities and Preliminary Mechanism of Action. Molecules 2015; 20:20118-30. [PMID: 26569197 PMCID: PMC6331989 DOI: 10.3390/molecules201119680] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/27/2015] [Accepted: 11/02/2015] [Indexed: 12/02/2022] Open
Abstract
Sixty 2-aryl-4,5-dihydrothiazoles were designed and synthesized in yields ranging from 64% to 89% from cysteine and substituted-benzonitriles via a novel metal- and catalyst-free method. The structures of the title compounds were confirmed mainly by NMR spectral data analysis. Antibacterial activity assays showed that the compounds (S)-2-(2′-hydroxyphenyl)-4-hydroxy-methyl-4,5-dihydrothiazole (7h) and (R)-2-(2′-hydroxyphenyl)-4-hydroxymethyl-4,5-dihydro-thiazole (7h′) exhibited significant inhibition against Ralstonia solanacearum, Pseudomonas syringae pv. actinidiae, Bacillus subtilis and Bacillus cereus, with minimum inhibitory concentrations (MICs) ranging from 3.91 to 31.24 μg·mL−1. The effect of substituents showed that not only electron-withdrawing groups, but also electron-donating groups could abolish the antibacterial activities unless a 2′-hydroxy group was introduced on the 2-aryl substituent of the 4,5-dihydrothiazole analogues. The results of scanning electron microscope (SEM) and fatty acid exposure experiments indicated that these antibacterial compounds influence fatty acid synthesis in the tested bacteria.
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