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Islam A, Chang YC, Chen XC, Weng CW, Chen CY, Wang CW, Chen MK, Tikhomirov AS, Shchekotikhin AE, Chueh PJ. Water-soluble 4-(dimethylaminomethyl)heliomycin exerts greater antitumor effects than parental heliomycin by targeting the tNOX-SIRT1 axis and apoptosis in oral cancer cells. eLife 2024; 12:RP87873. [PMID: 38567911 PMCID: PMC10990494 DOI: 10.7554/elife.87873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
The antibiotic heliomycin (resistomycin), which is generated from Streptomyces resistomycificus, has multiple activities, including anticancer effects. Heliomycin was first described in the 1960s, but its clinical applications have been hindered by extremely low solubility. A series of 4-aminomethyl derivatives of heliomycin were synthesized to increase water solubility; studies showed that they had anti-proliferative effects, but the drug targets remained unknown. In this study, we conducted cellular thermal shift assays (CETSA) and molecular docking simulations to identify and validate that heliomycin and its water-soluble derivative, 4-(dimethylaminomethyl)heliomycin (designated compound 4-dmH) engaged and targeted with sirtuin-1 (SIRT1) in p53-functional SAS and p53-mutated HSC-3 oral cancer cells. We further addressed the cellular outcome of SIRT1 inhibition by these compounds and found that, in addition to SIRT1, the water-soluble 4-dmH preferentially targeted a tumor-associated NADH oxidase (tNOX, ENOX2). The direct binding of 4-dmH to tNOX decreased the oxidation of NADH to NAD+ which diminished NAD+-dependent SIRT1 deacetylase activity, ultimately inducing apoptosis and significant cytotoxicity in both cell types, as opposed to the parental heliomycin-induced autophagy. We also observed that tNOX and SIRT1 were both upregulated in tumor tissues of oral cancer patients compared to adjacent normal tissues, suggesting their clinical relevance. Finally, the better therapeutic efficacy of 4-dmH was confirmed in tumor-bearing mice, which showed greater tNOX and SIRT1 downregulation and tumor volume reduction when treated with 4-dmH compared to heliomycin. Taken together, our in vitro and in vivo findings suggest that the multifaceted properties of water-soluble 4-dmH enable it to offer superior antitumor value compared to parental heliomycin, and indicated that it functions through targeting the tNOX-NAD+-SIRT1 axis to induce apoptosis in oral cancer cells.
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Affiliation(s)
- Atikul Islam
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
| | - Yu-Chun Chang
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
| | - Xiao-Chi Chen
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
| | - Chia-Wei Weng
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
- Institute of Medicine, Chung Shan Medical UniversityTaichungTaiwan
| | - Chien-Yu Chen
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
| | - Che-Wei Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, Changhua Christian HospitalChanghuaTaiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing UniversityTaichungTaiwan
| | - Mu-Kuan Chen
- Department of Otorhinolaryngology-Head and Neck Surgery, Changhua Christian HospitalChanghuaTaiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing UniversityTaichungTaiwan
| | | | | | - Pin Ju Chueh
- Institute of Biomedical Sciences, National Chung Hsing UniversityTaichungTaiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing UniversityTaichungTaiwan
- Department of Medical Research, China Medical University HospitalTaichungTaiwan
- Graduate Institute of Basic Medicine, China Medical UniversityTaichungTaiwan
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El-Hawary SS, Hassan MHA, Hudhud AO, Al-Karmalawy AA, Mustafa M, Hamed EAE, Abdelmohsen UR, Mohammed R. LC-HRMS Profiling and Cytotoxic Potential of Actinomycetes Associated with the Red Sea Soft Coral Sarcophyton glaucum: In vitro and In silico Studies. Chem Biodivers 2024; 21:e202301617. [PMID: 38193652 DOI: 10.1002/cbdv.202301617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/31/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
In the current study, the actinomycetes associated with the red sea-derived soft coral Sarcophyton glaucum were investigated in terms of biological and chemical diversity. Four different media, M1, ISP2, Marine Agar (MA), and Actinomycete isolation agar (AIA) were used for the isolation of three strains of actinomycetes that were identified as Streptomyces sp. UR 25, Micromonospora sp. UR32 and Saccharomonospora sp. UR 19. LC-HRMS analysis was used to investigate the chemical diversity of the isolated actinobacteria. The LC-HRMS data were statistically processed using MetaboAnalyst 5.0 viz to differentiate the extract groups and determine the optimal growth culturing conditions. Multivariate data statistical analysis revealed that the Micromonospora sp. extract cultured on (MA) medium is the most distinctive extract in terms of chemical composition. While, the Streptomyces sp. UR 25 extracts are differ significantly from Micromonospora sp. UR32 and Saccharomonospora sp. UR 19. Biological investigation using in vitro cytotoxic assay for actinobacteria extracts revealed the prominent potentiality of the Streptomyces sp. UR 25 cultured on oligotrophic medium against human hepatoma (HepG2), human breast adenocarcinoma (MCF-7) and human colon adenocarcinoma (CACO2) cell lines (IC50 =3.3, 4.2 and 6.8 μg/mL, respectively). SwissTarget Prediction speculated that among the identified compounds, 16-deethyl, indanomycin (8) could have reasonable affinity on HDM2 active site. In this respect, molecular docking study was performed for compound (8) to reveal a substantial affinity on HDM2 active site. In addition, molecular dynamics simulations were carried out at 200 ns for the most active compound (8) compared to the co-crystallized inhibitor DIZ giving deeper information regarding their thermodynamic and dynamic properties as well.
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Affiliation(s)
- Seham S El-Hawary
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, 11511, Egypt
| | - Marwa H A Hassan
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Ahmed O Hudhud
- Department of Pharmacognosy, Faculty of Pharmacy, Merit University, Sohag, 82511, Egypt
| | - Ahmed A Al-Karmalawy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta, 34518, Egypt
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, 6th of October City, Giza, 12566, Egypt
| | - Muhamad Mustafa
- IBMM, CNRS, ENSCM, Université de Montpellier, Montpellier, 34095, France
- Department of Medicinal Chemistry, Faculty of Pharmacy, Deraya University, Minia, 61111, Egypt
| | - Elsayed A E Hamed
- National institute of oceanography and Fisheries, Hurghada-Red Sea (NIOF), 84511, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia, 61111, Egypt
| | - Rabab Mohammed
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
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Zhu Y, Zhang E, Gao H, Shang C, Yin M, Ma M, Liu Y, Zhang X, Li X. Resistomycin Inhibits Wnt/β-Catenin Signaling to Induce the Apoptotic Death of Human Colorectal Cancer Cells. Mar Drugs 2023; 21:622. [PMID: 38132944 PMCID: PMC10745072 DOI: 10.3390/md21120622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/27/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Resistomycin is a natural antibiotic related to quinone that has been shown to exhibit robust antitumor activity. To further characterize the mechanistic basis for such activity, human colorectal cancer (CRC) cells were selected as a model to explore the role of Wnt/β-catenin signaling in the ability of resistomycin to induce apoptotic cell death. These analyses revealed that resistomycin was able to suppress β-catenin, TCF4, and GSK-3β expression, together with that of the downstream targets c-Myc and survivin. This coincided with elevated cleaved caspase-3 and Bax protein levels and a decline in Bcl-2 content. When β-catenin was silenced, this further enhanced the ability of resistomycin to induce apoptotic CRC cell death, whereas this apoptotic process was partially ablated when cells were treated using lithium chloride to activate Wnt/β-catenin signaling. Overall, these results support a model wherein resistomycin inhibits Wnt/β-catenin signaling within CRC cells, thereby inducing apoptotic death. Further research may be warranted to better clarify the potential utility of this compound as a candidate drug for use in the treatment of patients suffering from this form of cancer.
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Affiliation(s)
- Yaoyao Zhu
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - E Zhang
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Huan Gao
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Chuangeng Shang
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Mengxiong Yin
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Mingtao Ma
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Yu Liu
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Xuanfeng Zhang
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
| | - Xia Li
- Marine College, Shandong University, Weihai 264200, China; (Y.Z.); (E.Z.); (H.G.); (C.S.); (M.Y.); (M.M.); (Y.L.); (X.Z.)
- Shandong Kelun Pharmaceutical Co., Ltd., Binzhou 256600, China
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Soares JX, Afonso I, Omerbasic A, Loureiro DRP, Pinto MMM, Afonso CMM. The Chemical Space of Marine Antibacterials: Diphenyl Ethers, Benzophenones, Xanthones, and Anthraquinones. Molecules 2023; 28:molecules28104073. [PMID: 37241815 DOI: 10.3390/molecules28104073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/28/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
The emergence of multiresistant bacteria and the shortage of antibacterials in the drug pipeline creates the need to search for novel agents. Evolution drives the optimization of the structure of marine natural products to act as antibacterial agents. Polyketides are a vast and structurally diverse family of compounds that have been isolated from different marine microorganisms. Within the different polyketides, benzophenones, diphenyl ethers, anthraquinones, and xanthones have shown promising antibacterial activity. In this work, a dataset of 246 marine polyketides has been identified. In order to characterize the chemical space occupied by these marine polyketides, molecular descriptors and fingerprints were calculated. Molecular descriptors were analyzed according to the scaffold, and principal component analysis was performed to identify the relationships among the different descriptors. Generally, the identified marine polyketides are unsaturated, water-insoluble compounds. Among the different polyketides, diphenyl ethers tend to be more lipophilic and non-polar than the remaining classes. Molecular fingerprints were used to group the polyketides according to their molecular similarity into clusters. A total of 76 clusters were obtained, with a loose threshold for the Butina clustering algorithm, highlighting the large structural diversity of the marine polyketides. The large structural diversity was also evidenced by the visualization trees map assembled using the tree map (TMAP) unsupervised machine-learning method. The available antibacterial activity data were examined in terms of bacterial strains, and the activity data were used to rank the compounds according to their antibacterial potential. This potential ranking was used to identify the most promising compounds (four compounds) which can inspire the development of new structural analogs with better potency and absorption, distribution, metabolism, excretion, and toxicity (ADMET) properties.
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Affiliation(s)
- José X Soares
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
- LAQV-REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Inês Afonso
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Adaleta Omerbasic
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Daniela R P Loureiro
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
- LAQV-REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Madalena M M Pinto
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Carlos M M Afonso
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
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5
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Alam K, Mazumder A, Sikdar S, Zhao YM, Hao J, Song C, Wang Y, Sarkar R, Islam S, Zhang Y, Li A. Streptomyces: The biofactory of secondary metabolites. Front Microbiol 2022; 13:968053. [PMID: 36246257 PMCID: PMC9558229 DOI: 10.3389/fmicb.2022.968053] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Natural products derived from microorganisms serve as a vital resource of valuable pharmaceuticals and therapeutic agents. Streptomyces is the most ubiquitous bacterial genus in the environments with prolific capability to produce diverse and valuable natural products with significant biological activities in medicine, environments, food industries, and agronomy sectors. However, many natural products remain unexplored among Streptomyces. It is exigent to develop novel antibiotics, agrochemicals, anticancer medicines, etc., due to the fast growth in resistance to antibiotics, cancer chemotherapeutics, and pesticides. This review article focused the natural products secreted by Streptomyces and their function and importance in curing diseases and agriculture. Moreover, it discussed genomic-driven drug discovery strategies and also gave a future perspective for drug development from the Streptomyces.
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Affiliation(s)
- Khorshed Alam
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Arpita Mazumder
- Department of Microbiology, University of Chittagong, Chittagong, Bangladesh
| | - Suranjana Sikdar
- Department of Microbiology, University of Chittagong, Chittagong, Bangladesh
| | - Yi-Ming Zhao
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Jinfang Hao
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Chaoyi Song
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yanyan Wang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Rajib Sarkar
- Industrial Microbiology Research Division, BCSIR Chattogram Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Chattogram, Bangladesh
| | - Saiful Islam
- Industrial Microbiology Research Division, BCSIR Chattogram Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Chattogram, Bangladesh
- Saiful Islam,
| | - Youming Zhang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- Chinese Academy of Sciences (CAS) Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Youming Zhang,
| | - Aiying Li
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- *Correspondence: Aiying Li,
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6
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Xing L, Chang Y, Zhang X, Hou X, Han Y, Shah M, Zhu T, Peng J, Zhang G, Che Q, Li D. Dimeric Tetracenomycin Derivatives from a Taklamakan Desert-Derived Streptomyces sp. HDN154193. JOURNAL OF NATURAL PRODUCTS 2022; 85:301-305. [PMID: 34933562 DOI: 10.1021/acs.jnatprod.1c00735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Bitetracenomycin A (1) and its diastereomers [(±)-bitetracenomycin B, (±)-2] were discovered from the cultures of Streptomyces sp. HDN154193. Compounds 1 and (±)-2 were the first tetracenomycin dimers obtained from a natural source with sp3 methine protons at the bridge positions (C-12/12'), which also exhibited broad-spectrum antibacterial activity. The racemate (±)-2 was semisynthesized and separated into enantiomers (+)-2 and (-)-2, and the absolute configurations were determined by specific rotation and ECD data. These metabolites exhibited potent antibacterial activity especially against drug-resistant strains (MRSA and MRCNS) with MIC values ranging from 1.0 to 1.9 μg/mL.
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Affiliation(s)
- Li Xing
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Yimin Chang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Xiaoqian Zhang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Xuewen Hou
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Yaxin Han
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Mudassir Shah
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100125, People's Republic of China
- Department of Pharmacy, Abbottabad University of Science and Technology, Havellian, District Abbottabad 22010, KPK, Pakistan
| | - Tianjiao Zhu
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Jixing Peng
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, People's Republic of China
| | - Guojian Zhang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, People's Republic of China
| | - Qian Che
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Dehai Li
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, People's Republic of China
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Resistomycin Induced Apoptosis and Cycle Arrest in Human Hepatocellular Carcinoma Cells by Activating p38 MAPK Pathway In Vitro and In Vivo. Pharmaceuticals (Basel) 2021; 14:ph14100958. [PMID: 34681182 PMCID: PMC8537932 DOI: 10.3390/ph14100958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/10/2021] [Accepted: 09/16/2021] [Indexed: 12/02/2022] Open
Abstract
Resistomycin, a quinone-related natural antibiotic, has shown strong inhibitory activity against human hepatocellular carcinoma (HCC) in vitro. Here, we investigated the role of p38 MAPK in the pro-apoptotic and G2/M phase arrest action of HCC HepG2 cells upon treatment with resistomycin in vitro and in vivo. Our results showed that resistomycin dose- and time-dependently reduced the viability of HepG2 cells and also showed lower cytotoxicity in normal human kidney cells (293T) and hepatocyte cells (HL-7702). Resistomycin treatment induced apoptosis and cell cycle arrest in HepG2 cells, accompanied by changes in the expression of related proteins, including Bax, Cyclin B1, etc. Surprisingly, resistomycin-mediated apoptotic cell death and cell cycle arrest were impeded by SB203580 (an inhibitor of p38 catalytic activity), suggesting that p38 MAPK signaling may play an important role that impedes eventual cell death. In this connection, data in vitro and in vivo demonstrated that resistomycin increased the phosphorylation of p38 and MAPKAPK-2 in HepG2 cells. Furthermore, we provided evidence that p38 signaling is involved in resistomycin-induced p38 MAPK pathway effects in HCC, using computer docking models. Our study indicated that resistomycin activates the p38 MAPK signaling pathway by which the growth of HepG2 cells is suppressed for apoptosis and G2/M phase arrest in vitro and in vivo, and it is a promising therapeutic leading compound for drug development in HCC treatment.
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Tikhomirov AS, Abdelhamid MAS, Nadysev GY, Zatonsky GV, Bykov EE, Chueh PJ, Waller ZAE, Shchekotikhin AE. Water-Soluble Heliomycin Derivatives to Target i-Motif DNA. JOURNAL OF NATURAL PRODUCTS 2021; 84:1617-1625. [PMID: 33974416 DOI: 10.1021/acs.jnatprod.1c00162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Heliomycin (also known as resistomycin) is an antibiotic with a broad spectrum of biological activities. However, low aqueous solubility and poor knowledge of its chemical properties have limited the development of this natural product. Here, we present an original scheme for the introduction of aminoalkylamine residues at positions 3, 5, and 7 of heliomycin and, using this, have prepared a series of novel water-soluble derivatives. The addition of side chains to the heliomycin scaffold significantly improves their interaction with different DNA secondary structures. One derivative, 7-deoxy-7-(2-aminoethyl)amino-10-O-methylheliomycin (8e), demonstrated affinity, stabilization potential, and good selectivity toward i-motif-forming DNA sequences over the duplex and G-quadruplex. Heliomycin derivatives therefore represent promising molecular scaffolds for further development as DNA-i-motif interacting ligands and potential chemotherapeutic agents.
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Affiliation(s)
- Alexander S Tikhomirov
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 11 B. Pirogovskaya Street, Moscow 119021, Russia
| | | | - Georgy Y Nadysev
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 11 B. Pirogovskaya Street, Moscow 119021, Russia
| | - George V Zatonsky
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 11 B. Pirogovskaya Street, Moscow 119021, Russia
| | - Eugene E Bykov
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 11 B. Pirogovskaya Street, Moscow 119021, Russia
| | - Pin Ju Chueh
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan, Republic of China
| | - Zoë A E Waller
- School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, United Kingdom
| | - Andrey E Shchekotikhin
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 11 B. Pirogovskaya Street, Moscow 119021, Russia
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Marine Anthraquinones: Pharmacological and Toxicological Issues. Mar Drugs 2021; 19:md19050272. [PMID: 34068184 PMCID: PMC8152984 DOI: 10.3390/md19050272] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 12/12/2022] Open
Abstract
The marine ecosystem, populated by a myriad of animals, plants, and microorganisms, is an inexhaustible reservoir of pharmacologically active molecules. Among the multiple secondary metabolites produced by marine sources, there are anthraquinones and their derivatives. Besides being mainly known to be produced by terrestrial species, even marine organisms and the uncountable kingdom of marine microorganisms biosynthesize anthraquinones. Anthraquinones possess many different biological activities, including a remarkable antitumor activity. However, due to their peculiar chemical structures, anthraquinones are often associated with toxicological issues, even relevant, such as genotoxicity and mutagenicity. The aim of this review is to critically describe the anticancer potential of anthraquinones derived from marine sources and their genotoxic and mutagenic potential. Marine-derived anthraquinones show a promising anticancer potential, although clinical studies are missing. Additionally, an in-depth investigation of their toxicological profile is needed before advocating anthraquinones as a therapeutic armamentarium in the oncological area.
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10
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Alazzouni AS, Mahmoud AA, Omran MM, Essawy EA, Abdalla MS, Abdelfattah MS. Inhibitory and ameliorative effect of heliomycin derived from actinomycete on induced hepatocellular carcinoma in rats. Naunyn Schmiedebergs Arch Pharmacol 2021; 394:1091-1102. [PMID: 33416934 DOI: 10.1007/s00210-020-02043-5] [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: 09/22/2020] [Accepted: 12/13/2020] [Indexed: 12/09/2022]
Abstract
The hepatoprotective activity of heliomycin obtained from the culture broth of actinomycete AB5 against diethylnitrosamine (DEN)-induced hepatic cancer in Wistar rats was estimated. Heliomycin exhibited a significant decrease in the levels of alanine transaminase (ALT), aspartate transaminase (AST), and alkaline phosphatase (ALP) compared to the positive control. For instance, the heliomycin group after 20 weeks showed a significant decline in ALT, AST, and ALP values (70.75 ± 5.12, 140.25 ± 11.75, and 163.25 ± 18.66, respectively) compared to the positive control group (170.00 ± 9.55, 252.75 ± 12.33, and 278.00 ± 21.32, respectively). Additionally, the isolated compound showed a highly significant decrease in serum alpha-fetoprotein (AFP) levels. After 8, 16, and 20 weeks, the mean values of AFP in the heliomycin group revealed a highly significant decrease (33.62 ± 2.46, 30.00 ± 4.05, and 28.50 ± 2.64, respectively) compared to the positive control group (49.45 ± 3.03, 81.90 ± 6.70, and 90.75 ± 5.12, respectively). The histopathological investigation of liver sections supported the results of biochemical analysis. It was demonstrated that heliomycin showed histological improvement of hepatocytes and marked increase of nuclear pyknotic with clear cytoplasm, which is a sign of improving the apoptotic pathway of malignant cells. It also displayed marked fibrosis at most of the malignant cells and the development of some regenerative nodules. Heliomycin showed moderate immunoreactivity with alpha-fetoprotein (AFP), and proliferation cell nuclear antigen (PCNA) compared to the positive control group. To the best of our knowledge, this is the first study to report the anticancer activity of heliomycin against hepatocellular carcinoma in vivo.
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Affiliation(s)
- Ahmed S Alazzouni
- Zoology Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt
| | - Abdulla A Mahmoud
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt
| | - Mohamed M Omran
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt
| | - Ehab A Essawy
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt
| | - Mohga S Abdalla
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt.
| | - Mohamed S Abdelfattah
- Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt. .,Natural Products Research Unit, Chemistry Department, Faculty of Science, Helwan University, Cairo, 11795, Egypt.
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11
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Osterman IA, Wieland M, Maviza TP, Lashkevich KA, Lukianov DA, Komarova ES, Zakalyukina YV, Buschauer R, Shiriaev DI, Leyn SA, Zlamal JE, Biryukov MV, Skvortsov DA, Tashlitsky VN, Polshakov VI, Cheng J, Polikanov YS, Bogdanov AA, Osterman AL, Dmitriev SE, Beckmann R, Dontsova OA, Wilson DN, Sergiev PV. Tetracenomycin X inhibits translation by binding within the ribosomal exit tunnel. Nat Chem Biol 2020; 16:1071-1077. [PMID: 32601485 DOI: 10.1038/s41589-020-0578-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/28/2020] [Indexed: 11/09/2022]
Abstract
The increase in multi-drug resistant pathogenic bacteria is making our current arsenal of clinically used antibiotics obsolete, highlighting the urgent need for new lead compounds with distinct target binding sites to avoid cross-resistance. Here we report that the aromatic polyketide antibiotic tetracenomycin (TcmX) is a potent inhibitor of protein synthesis, and does not induce DNA damage as previously thought. Despite the structural similarity to the well-known translation inhibitor tetracycline, we show that TcmX does not interact with the small ribosomal subunit, but rather binds to the large subunit, within the polypeptide exit tunnel. This previously unappreciated binding site is located adjacent to the macrolide-binding site, where TcmX stacks on the noncanonical basepair formed by U1782 and U2586 of the 23S ribosomal RNA. Although the binding site is distinct from the macrolide antibiotics, our results indicate that like macrolides, TcmX allows translation of short oligopeptides before further translation is blocked.
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Affiliation(s)
- Ilya A Osterman
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia. .,Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Maximiliane Wieland
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Tinashe P Maviza
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia
| | - Kseniya A Lashkevich
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Dmitrii A Lukianov
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia
| | - Ekaterina S Komarova
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia.,Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yuliya V Zakalyukina
- Department of Soil Science and Department of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Robert Buschauer
- Gene Center, Department of Biochemistry, University of Munich, Munich, Germany
| | - Dmitrii I Shiriaev
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Semen A Leyn
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,A.A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow, Russia
| | - Jaime E Zlamal
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Mikhail V Biryukov
- Department of Soil Science and Department of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Dmitry A Skvortsov
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Vadim N Tashlitsky
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Vladimir I Polshakov
- Center for Magnetic Tomography and Spectroscopy, Faculty of Fundamental Medicine, Lomonosov Moscow State University, Moscow, Russia
| | - Jingdong Cheng
- Gene Center, Department of Biochemistry, University of Munich, Munich, Germany
| | - Yury S Polikanov
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, IL, USA
| | - Alexey A Bogdanov
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Andrei L Osterman
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Sergey E Dmitriev
- Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Roland Beckmann
- Gene Center, Department of Biochemistry, University of Munich, Munich, Germany
| | - Olga A Dontsova
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia.,Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Daniel N Wilson
- Institute for Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany.
| | - Petr V Sergiev
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia. .,Department of Chemistry, Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
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12
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Diversity of Streptomyces spp. from mangrove forest of Sarawak (Malaysia) and screening of their antioxidant and cytotoxic activities. Sci Rep 2019; 9:15262. [PMID: 31792235 PMCID: PMC6888828 DOI: 10.1038/s41598-019-51622-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 10/01/2019] [Indexed: 12/25/2022] Open
Abstract
Streptomycetes have been the center of attraction within scientific community owing to their capability to produce various bioactive compounds, for instance, with different antimicrobial, anticancer, and antioxidant properties. The search for novel Streptomyces spp. from underexplored area such as mangrove environment has been gaining attention since these microorganisms could produce pharmaceutically important metabolites. The aim of this study is to discover the diversity of Streptomyces spp. from mangrove in Sarawak and their bioactive potentials — in relation to antioxidant and cytotoxic activities. A total of 88 Streptomyces isolates were successfully recovered from the mangrove soil in Kuching, state of Sarawak, Malaysia. Phylogenetic analysis of all the isolates and their closely related type strains using 16S rRNA gene sequences resulted in 7 major clades in the phylogenetic tree reconstructed based on neighbour-joining algorithm. Of the 88 isolates, 18 isolates could be considered as potentially novel species according to the 16S rRNA gene sequence and phylogenetic analyses. Preliminary bioactivity screening conducted on the potential novel Streptomyces isolates revealed significant antioxidant activity and notable cytotoxic effect against tested colon cancer cell lines (HCT-116, HT-29, Caco-2, and SW480), with greater cytotoxicity towards SW480 and HT-29 cells. This study highlighted that the Sarawak mangrove environment is a rich reservoir containing streptomycetes that could produce novel secondary metabolites with antioxidant and cytotoxic activities.
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13
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Nadysev GY, Tikhomirov AS, Lin MH, Yang YT, Dezhenkova LG, Chen HY, Kaluzhny DN, Schols D, Shtil AA, Shchekotikhin AE, Chueh PJ. Aminomethylation of heliomycin: Preparation and anticancer characterization of the first series of semi-synthetic derivatives. Eur J Med Chem 2018; 143:1553-1562. [DOI: 10.1016/j.ejmech.2017.10.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 10/16/2017] [Accepted: 10/17/2017] [Indexed: 01/06/2023]
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14
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Fernandes SO, Kirchman DL, Michotey VD, Bonin PC, LokaBharathi PA. Bacterial diversity in relatively pristine and anthropogenically-influenced mangrove ecosystems (Goa, India). Braz J Microbiol 2015; 45:1161-71. [PMID: 25763019 PMCID: PMC4323288 DOI: 10.1590/s1517-83822014000400006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 06/06/2014] [Indexed: 11/21/2022] Open
Abstract
To appreciate differences in benthic bacterial community composition at the relatively pristine Tuvem and the anthropogenically-influenced Divar mangrove ecosystems in Goa, India, parallel tag sequencing of the V6 region of 16S rDNA was carried out. We hypothesize that availability of extraneously-derived anthropogenic substrates could act as a stimulatant but not a deterrent to promote higher bacterial diversity at Divar. Our observations revealed that the phylum Proteobacteria was dominant at both locations comprising 43–46% of total tags. The Tuvem ecosystem was characterized by an abundance of members belonging to the class Deltaproteobacteria (21%), ~ 2100 phylotypes and 1561 operational taxonomic units (OTUs) sharing > 97% similarity. At Divar, the Gammaproteobacteria were ~ 2× higher (17%) than at Tuvem. A more diverse bacterial community with > 3300 phylotypes and > 2000 OTUs mostly belonging to Gammaproteobacteria and a significantly higher DNT (n = 9, p < 0.001, df = 1) were recorded at Divar. These findings suggest that the quantity and quality of pollutants at Divar are perhaps still at a level to maintain high diversity. Using this technique we could show higher diversity at Divar with the possibility of Gammaproteobacteria contributing to modulating excess nitrate.
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Affiliation(s)
- Sheryl Oliveira Fernandes
- Biological Oceanography Division National Institute of Oceanography Dona PaulaGoa India Biological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, India
| | - David L Kirchman
- School of Marine Science and Policy University of Delaware LewesDE USA School of Marine Science and Policy, University of Delaware, Lewes, DE, USA
| | - Valérie D Michotey
- Mediterranean Institute of Oceanography Aix-Marseille University Marseille France Mediterranean Institute of Oceanography, Aix-Marseille University, Marseille, France. ; Aix Marseille Université MIO UM 110, 13288Marseille France Aix Marseille Université, MIO UM 110, 13288, Marseille, France
| | - Patricia C Bonin
- Mediterranean Institute of Oceanography Aix-Marseille University Marseille France Mediterranean Institute of Oceanography, Aix-Marseille University, Marseille, France. ; Aix Marseille Université MIO UM 110, 13288Marseille France Aix Marseille Université, MIO UM 110, 13288, Marseille, France
| | - P A LokaBharathi
- Biological Oceanography Division National Institute of Oceanography Dona PaulaGoa India Biological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, India
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15
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Manivasagan P, Kang KH, Sivakumar K, Li-Chan ECY, Oh HM, Kim SK. Marine actinobacteria: an important source of bioactive natural products. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 38:172-188. [PMID: 24959957 DOI: 10.1016/j.etap.2014.05.014] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 05/21/2014] [Accepted: 05/26/2014] [Indexed: 06/03/2023]
Abstract
Marine environment is largely an untapped source for deriving actinobacteria, having potential to produce novel, bioactive natural products. Actinobacteria are the prolific producers of pharmaceutically active secondary metabolites, accounting for about 70% of the naturally derived compounds that are currently in clinical use. Among the various actinobacterial genera, Actinomadura, Actinoplanes, Amycolatopsis, Marinispora, Micromonospora, Nocardiopsis, Saccharopolyspora, Salinispora, Streptomyces and Verrucosispora are the major potential producers of commercially important bioactive natural products. In this respect, Streptomyces ranks first with a large number of bioactive natural products. Marine actinobacteria are unique enhancing quite different biological properties including antimicrobial, anticancer, antiviral, insecticidal and enzyme inhibitory activities. They have attracted global in the last ten years for their ability to produce pharmaceutically active compounds. In this review, we have focused attention on the bioactive natural products isolated from marine actinobacteria, possessing unique chemical structures that may form the basis for synthesis of novel drugs that could be used to combat resistant pathogenic microorganisms.
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Affiliation(s)
- Panchanathan Manivasagan
- Specialized Graduate School Science & Technology Convergence, Department of Marine-Bio. Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan 608-739, Republic of Korea
| | - Kyong-Hwa Kang
- Specialized Graduate School Science & Technology Convergence, Department of Marine-Bio. Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan 608-739, Republic of Korea
| | - Kannan Sivakumar
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai 608 502, Tamil Nadu, India
| | - Eunice C Y Li-Chan
- The University of British Columbia, Faculty of Land and Food Systems, Food Nutrition and Health Program, 2205 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| | - Hyun-Myung Oh
- Specialized Graduate School Science & Technology Convergence, Department of Marine-Bio. Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan 608-739, Republic of Korea
| | - Se-Kwon Kim
- Specialized Graduate School Science & Technology Convergence, Department of Marine-Bio. Convergence Science and Marine Bioprocess Research Center, Pukyong National University, Busan 608-739, Republic of Korea.
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16
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Systematic and biotechnological aspects of halophilic and halotolerant actinomycetes. Extremophiles 2012; 17:1-13. [PMID: 23129307 DOI: 10.1007/s00792-012-0493-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 10/18/2012] [Indexed: 12/22/2022]
Abstract
More than 70 species of halotolerant and halophilic actinomycetes belonging to at least 24 genera have been validly described. Halophilic actinomycetes are a less explored source of actinomycetes for discovery of novel bioactive secondary metabolites. Degradation of aliphatic and aromatic organic compounds, detoxification of pollutants, production of new enzymes and other metabolites such as antibiotics, compatible solutes and polymers are other potential industrial applications of halophilic and halotolerant actinomycetes. Especially new bioactive secondary metabolites that are derived from only a small fraction of the investigated halophilic actinomycetes, mainly from marine habitats, have revealed the huge capacity of this physiological group in production of new bioactive chemical entities. Combined high metabolic capacities of actinomycetes and unique features related to extremophilic nature of the halophilic actinomycetes have conferred on them an influential role for future biotechnological applications.
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17
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Vijayabharathi R, Sathyadevi P, Krishnamoorthy P, Senthilraja D, Brunthadevi P, Sathyabama S, Priyadarisini VB. Interaction studies of resistomycin from Streptomyces aurantiacus AAA5 with calf thymus DNA and bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 89:294-300. [PMID: 22285949 DOI: 10.1016/j.saa.2011.12.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 12/24/2011] [Accepted: 12/26/2011] [Indexed: 05/31/2023]
Abstract
Resistomycin, a secondary metabolite produced by Streptomyces aurantiacus AAA5. The binding interaction of resistomycin with calf thymus DNA (CT DNA) and bovine serum albumin (BSA) was investigated by spectrophotometry, spectrofluorimetry, circular dichroism (CD) and synchronous fluorescence techniques under physiological conditions in vitro. Absorption spectral studies along with the fluorescence competition with ethidium bromide measurements and circular dichroism clearly suggest that the resistomycin bind with CT DNA relatively strong via groove binding. BSA interaction results revealed that the drug was found to quench the fluorescence intensity of the protein through a static quenching mechanism. The number of binding sites 'n' and apparent binding constant 'K' calculated according to the Scatchard equation exhibit a good binding property to bovine serum albumin protein. In addition, the results observed from synchronous fluorescence measurements clearly demonstrate the occurrence of conformational changes of BSA upon addition of the test compound.
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Affiliation(s)
- R Vijayabharathi
- Clinical Biotechnology Lab, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, India.
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18
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In vitro antiplasmodial activity of marine sponge Clathria indica associated bacteria against Palsmodium falciparum. Asian Pac J Trop Biomed 2012. [DOI: 10.1016/s2221-1691(12)60367-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Assessment of resistomycin, as an anticancer compound isolated and characterized from Streptomyces aurantiacus AAA5. J Microbiol 2011; 49:920-6. [DOI: 10.1007/s12275-011-1260-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 08/22/2011] [Indexed: 10/14/2022]
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20
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Lachnit T, Meske D, Wahl M, Harder T, Schmitz R. Epibacterial community patterns on marine macroalgae are host-specific but temporally variable. Environ Microbiol 2010; 13:655-65. [DOI: 10.1111/j.1462-2920.2010.02371.x] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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TAN N, SHAO CL, SHE ZG, LIN YC. Progress on Quinone Secondary Metabolites of Marine Microorganisms. Chin J Nat Med 2009. [DOI: 10.3724/sp.j.1009.2009.00071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Solanki R, Khanna M, Lal R. Bioactive compounds from marine actinomycetes. Indian J Microbiol 2008; 48:410-31. [PMID: 23100742 PMCID: PMC3476783 DOI: 10.1007/s12088-008-0052-z] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2007] [Accepted: 06/12/2008] [Indexed: 11/28/2022] Open
Abstract
Actinomycetes are one of the most efficient groups of secondary metabolite producers and are very important from an industrial point of view. Among its various genera, Streptomyces, Saccharopolyspora, Amycolatopsis, Micromonospora and Actinoplanes are the major producers of commercially important biomolecules. Several species have been isolated and screened from the soil in the past decades. Consequently the chance of isolating a novel actinomycete strain from a terrestrial habitat, which would produce new biologically active metabolites, has reduced. The most relevant reason for discovering novel secondary metabolites is to circumvent the problem of resistant pathogens, which are no longer susceptible to the currently used drugs. Existence of actinomycetes has been reported in the hitherto untapped marine ecosystem. Marine actinomycetes are efficient producers of new secondary metabolites that show a range of biological activities including antibacterial, antifungal, anticancer, insecticidal and enzyme inhibition. Bioactive compounds from marine actinomycetes possess distinct chemical structures that may form the basis for synthesis of new drugs that could be used to combat resistant pathogens.
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Affiliation(s)
- Renu Solanki
- Acharya Narendra Dev College, University of Delhi, Govindpuri, Kalkaji, New Delhi, 110 019 India
| | - Monisha Khanna
- Acharya Narendra Dev College, University of Delhi, Govindpuri, Kalkaji, New Delhi, 110 019 India
| | - Rup Lal
- Molecular Biology Lab, Department of Zoology, University of Delhi, Delhi, 110 007 India
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A tropical marine microbial natural products geobibliography as an example of desktop exploration of current research using web visualisation tools. Mar Drugs 2008; 6:550-77. [PMID: 19172194 PMCID: PMC2630847 DOI: 10.3390/md20080028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 10/09/2008] [Accepted: 10/09/2008] [Indexed: 11/17/2022] Open
Abstract
Microbial marine biodiscovery is a recent scientific endeavour developing at a time when information and other technologies are also undergoing great technical strides. Global visualisation of datasets is now becoming available to the world through powerful and readily available software such as Worldwind, ArcGIS Explorer and Google Earth. Overlaying custom information upon these tools is within the hands of every scientist and more and more scientific organisations are making data available that can also be integrated into these global visualisation tools. The integrated global view that these tools enable provides a powerful desktop exploration tool. Here we demonstrate the value of this approach to marine microbial biodiscovery by developing a geobibliography that incorporates citations on tropical and near-tropical marine microbial natural products research with Google Earth and additional ancillary global data sets. The tools and software used are all readily available and the reader is able to use and install the material described in this article.
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24
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Sivakumar K, Sahu MK, Thangaradjou T, Kannan L. Research on marine actinobacteria in India. Indian J Microbiol 2007; 47:186-96. [PMID: 23100666 DOI: 10.1007/s12088-007-0039-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2007] [Revised: 05/29/2007] [Accepted: 06/02/2007] [Indexed: 10/22/2022] Open
Abstract
Marine actinobacteriology is one of the major emerging areas of research in tropics. Marine actinobacteria occur on the sediments and in water and also other biomass (mangrove) and substrates (animal). These organisms are gaining importance not only for their taxonomic and ecological perspectives, but also for their unique metabolites and enzymes. Many earlier studies on these organisms were confined only to the temperate regions. In tropical environment, investigations on them have gained importance only in the last two decades. So far, from the Indian peninsula, 41 species of actinobacteria belonging to 8 genera have been recorded. The genus, Streptomyces of marine origin has been more frequently recorded. Of 9 maritime states of India, only 4 have been extensively covered for the study of marine actinobacteria. Most of the studies conducted pertain to isolation, identification and maintenance of these organisms in different culture media. Further, attention has been focused on studying their antagonistic properties against different pathogens. Their biotechnological potentials are yet to be fully explored.
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Affiliation(s)
- K Sivakumar
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, 608 502 Tamil Nadu India
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