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Celebi D, Celebi O, Taghizadehghalehjoughi A, Baser S, Aydın E, Calina D, Charvalos E, Docea AO, Tsatsakis A, Mezhuev Y, Yildirim S. Activity of zinc oxide and zinc borate nanoparticles against resistant bacteria in an experimental lung cancer model. Daru 2024; 32:197-206. [PMID: 38366078 PMCID: PMC11087447 DOI: 10.1007/s40199-024-00505-2] [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: 04/24/2023] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
BACKGROUND Recent research indicates a prevalence of typical lung infections, such as pneumonia, in lung cancer patients. Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii stand out as antibiotic-resistant pathogens. Given this, there is a growing interest in alternative therapeutic avenues. Boron and zinc derivatives exhibit antimicrobial, antiviral, and antifungal properties. OBJECTIVES This research aimed to establish the effectiveness of ZnO and ZB NPs in combating bacterial infections in lung cancer cell lines. METHODS Initially, this study determined the minimal inhibitory concentration (MIC) and fractional inhibitory concentration (FIC) of zinc oxide nanoparticles (ZnO NPs) and zinc borate (ZB) on chosen benchmark strains. Subsequent steps involved gauging treatment success through a lung cancer-bacteria combined culture and immunohistochemical analysis. RESULTS The inhibitory impact of ZnO NPs on bacteria was charted as follows: 0.97 µg/mL for K. pneumoniae 700603, 1.95 µg/mL for P. aeruginosa 27853, and 7.81 µg/mL for Acinetobacter baumannii 19,606. In comparison, the antibacterial influence of zinc borate was measured as 7.81 µg/mL for Klebsiella pneumoniae 700603 and 500 µg/mL for both P. aeruginosa 27853 and A.baumannii 19606. After 24 h, the cytotoxicity of ZnO NPs and ZB was analyzed using the MTT technique. The lowest cell viability was marked in the 500 µg/mL ZB NPs group, with a viability rate of 48.83% (P < 0.001). However, marked deviations appeared at ZB concentrations of 61.5 µg/mL (P < 0.05) and ZnO NPs at 125 µg/mL. CONCLUSION A synergistic microbial inhibitory effect was observed when ZnO NP and ZB were combined against the bacteria under investigation.
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Affiliation(s)
- Demet Celebi
- Faculty of Veterinary Medicine, Department of Microbiology, Ataturk University, Ataturk University Avenue, Erzurum, 25240, Turkey
- Vaccine Application and Development Center, Ataturk University, Ataturk University Avenue, Erzurum, 25240, Turkey
| | - Ozgur Celebi
- Faculty of Medicine, Department of Medical Microbiology, Ataturk University, Ataturk University Avenue, Erzurum, 25240, Turkey
| | - Ali Taghizadehghalehjoughi
- Faculty of Medicine, Department of Medical Pharmacology, Seyh Edebali University, 27 Fatih Sultan Mehmet Avenue, Bilecik, 11000, Turkey
| | - Sumeyye Baser
- Faculty of Medicine, Department of Medical Microbiology, Ataturk University, Ataturk University Avenue, Erzurum, 25240, Turkey
| | - Elif Aydın
- Tavsanli Vocational School of Health Services, Kutahya Health Sciences University, Sehit Ali Gaffar Okan Avenue, Kutahya, 430200, Turkey
| | - Daniela Calina
- Department of Clinical Pharmacy, University of Medicine and Pharmacy of Craiova, Craiova, 200349, Romania
| | | | - Anca Oana Docea
- Department of Toxicology, University of Medicine and Pharmacy of Craiova, Craiova, 200349, Romania
| | - Aristidis Tsatsakis
- Department of Forensic Sciences and Toxicology, Faculty of Medicine, University of Crete, Heraklion, 71003, Greece.
| | - Yaroslav Mezhuev
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Square, Moscow, 125047, Russia
- Laboratory of Heterochain Polymers, A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova st, Moscow, 119991, Russia
| | - Serkan Yildirim
- Faculty of Veterinary Medicine, Department of Pathology, Ataturk University, Ataturk University Avenue, Erzurum, 25240, Turkey
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Grams RJ, Santos WL, Scorei IR, Abad-García A, Rosenblum CA, Bita A, Cerecetto H, Viñas C, Soriano-Ursúa MA. The Rise of Boron-Containing Compounds: Advancements in Synthesis, Medicinal Chemistry, and Emerging Pharmacology. Chem Rev 2024; 124:2441-2511. [PMID: 38382032 DOI: 10.1021/acs.chemrev.3c00663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Boron-containing compounds (BCC) have emerged as important pharmacophores. To date, five BCC drugs (including boronic acids and boroles) have been approved by the FDA for the treatment of cancer, infections, and atopic dermatitis, while some natural BCC are included in dietary supplements. Boron's Lewis acidity facilitates a mechanism of action via formation of reversible covalent bonds within the active site of target proteins. Boron has also been employed in the development of fluorophores, such as BODIPY for imaging, and in carboranes that are potential neutron capture therapy agents as well as novel agents in diagnostics and therapy. The utility of natural and synthetic BCC has become multifaceted, and the breadth of their applications continues to expand. This review covers the many uses and targets of boron in medicinal chemistry.
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Affiliation(s)
- R Justin Grams
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, 900 West Campus Drive, Blacksburg, Virginia 24061, United States
| | - Webster L Santos
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, 900 West Campus Drive, Blacksburg, Virginia 24061, United States
| | | | - Antonio Abad-García
- Academia de Fisiología y Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, 11340 Mexico City, Mexico
| | - Carol Ann Rosenblum
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, 900 West Campus Drive, Blacksburg, Virginia 24061, United States
| | - Andrei Bita
- Department of Pharmacognosy & Phytotherapy, Faculty of Pharmacy, University of Medicine and Pharmacy of Craiova, 2 Petru Rareş Street, 200349 Craiova, Romania
| | - Hugo Cerecetto
- Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la República, Mataojo 2055, 11400 Montevideo, Uruguay
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Marvin A Soriano-Ursúa
- Academia de Fisiología y Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, 11340 Mexico City, Mexico
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Engelgeh T, Herrmann J, Jansen R, Müller R, Halbedel S. Tartrolon sensing and detoxification by the Listeria monocytogenes timABR resistance operon. Mol Microbiol 2023; 120:629-644. [PMID: 37804169 DOI: 10.1111/mmi.15178] [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: 07/28/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/09/2023]
Abstract
Listeria monocytogenes is a foodborne bacterium that naturally occurs in the soil. Originating from there, it contaminates crops and infects farm animals and their consumption by humans may lead to listeriosis, a systemic life-threatening infectious disease. The adaptation of L. monocytogenes to such contrastive habitats is reflected by the presence of virulence genes for host infection and other genes for survival under environmental conditions. Among the latter are ABC transporters for excretion of antibiotics produced by environmental competitors; however, most of these transporters have not been characterized. Here, we generated a collection of promoter-lacZ fusions for genes encoding ABC-type drug transporters of L. monocytogenes and screened this reporter strain collection for induction using a library of natural compounds produced by various environmental microorganisms. We found that the timABR locus (lmo1964-lmo1962) was induced by the macrodiolide antibiotic tartrolon B, which is synthesized by the soil myxobacterium Sorangium cellulosum. Tartrolon B resistance of L. monocytogenes was dependent on timAB, encoding the ATPase and the permease component of a novel ABC transporter. Moreover, transplantation of timAB was sufficient to confer tartrolon B resistance to Bacillus subtilis. Expression of the timABR locus was found to be auto-repressed by the TimR repressor, whose repressing activity was lost in the presence of tartrolon B. We also demonstrate that tartrolon sensitivity was suppressed by high external potassium concentrations, suggesting that tartrolon acts as potassium ionophore. Our results help to map the ecological interactions of an important human pathogen with its co-residing species within their joint natural reservoir.
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Affiliation(s)
- Tim Engelgeh
- FG11 Division of Enteropathogenic Bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany
| | - Jennifer Herrmann
- Department of Microbial Natural Products, Helmholtz Centre for Infection Research, Saarland University, Saarbrücken, Germany
- Department of Pharmaceutical Biotechnology, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Saarland University, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Rolf Jansen
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Rolf Müller
- Department of Microbial Natural Products, Helmholtz Centre for Infection Research, Saarland University, Saarbrücken, Germany
- Department of Pharmaceutical Biotechnology, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Saarland University, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Sven Halbedel
- FG11 Division of Enteropathogenic Bacteria and Legionella, Robert Koch Institute, Wernigerode, Germany
- Institute for Medical Microbiology and Hospital Hygiene, Otto von Guericke University Magdeburg, Magdeburg, Germany
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Lashani E, Amoozegar MA, Turner RJ, Moghimi H. Use of Microbial Consortia in Bioremediation of Metalloid Polluted Environments. Microorganisms 2023; 11:microorganisms11040891. [PMID: 37110315 PMCID: PMC10143001 DOI: 10.3390/microorganisms11040891] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/08/2023] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
Metalloids are released into the environment due to the erosion of the rocks or anthropogenic activities, causing problems for human health in different world regions. Meanwhile, microorganisms with different mechanisms to tolerate and detoxify metalloid contaminants have an essential role in reducing risks. In this review, we first define metalloids and bioremediation methods and examine the ecology and biodiversity of microorganisms in areas contaminated with these metalloids. Then we studied the genes and proteins involved in the tolerance, transport, uptake, and reduction of these metalloids. Most of these studies focused on a single metalloid and co-contamination of multiple pollutants were poorly discussed in the literature. Furthermore, microbial communication within consortia was rarely explored. Finally, we summarized the microbial relationships between microorganisms in consortia and biofilms to remove one or more contaminants. Therefore, this review article contains valuable information about microbial consortia and their mechanisms in the bioremediation of metalloids.
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Affiliation(s)
- Elham Lashani
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran 14178-64411, Iran;
| | - Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran 14178-64411, Iran;
- Correspondence: (M.A.A.); (H.M.); Tel.: +98-21-66415495 (H.M.)
| | - Raymond J. Turner
- Microbial Biochemistry Laboratory, Department of Biological Sciences, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada;
| | - Hamid Moghimi
- Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran 14178-64411, Iran
- Correspondence: (M.A.A.); (H.M.); Tel.: +98-21-66415495 (H.M.)
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Wang HL, Li R, Zhao M, Wang ZY, Tang H, Cao ZY, Zheng GL, Zhang W. A Drimane Meroterpenoid Borate as a Synchronous Ca + Oscillation Inhibitor from the Coral-Associated Fungus Alternaria sp. ZH-15. JOURNAL OF NATURAL PRODUCTS 2023; 86:429-433. [PMID: 36729068 DOI: 10.1021/acs.jnatprod.2c01028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Territrem F (1), a drimane meroterpenoid bearing a unique borate ring system, was isolated together with its diol precursor territrem B (2) from the fungus Alternaria sp. ZH-15 associated with the soft coral Lobophytum crassum collected in the South China Sea. The structure of the new compound was elucidated by spectroscopic analysis and an X-ray single-crystal diffraction study, representing a new type of boron-containing natural product. Both compounds significantly inhibited spontaneous synchronous Ca2+ oscillations (SCOs) and epileptic discharges induced by 4-aminopyridine, showing the potential for antiepileptic drug research. The 5,9-boronic ester derivative of 2 did not change its SCO inhibitory activity.
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Affiliation(s)
- Hong-Liang Wang
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Ran Li
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
| | - Min Zhao
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
| | - Zeng-Yiyi Wang
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
| | - Hua Tang
- Institute of Translational Medicine, Shanghai University, 99 Shang-Da Road, Shanghai 200444, People's Republic of China
| | - Zheng-Yu Cao
- State Key Laboratory of Natural Medicines and Department of TCM Pharmacology, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Zhong-Yang Road, Nanjing 211198, People's Republic of China
| | - Gui-Liang Zheng
- Department of Otorhinolaryngology, Head and Neck Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 1665 Kong-Jiang Road, Shanghai 200092, People's Republic of China
| | - Wen Zhang
- School of Pharmacy, Navy Medical University, 325 Guo-He Road, Shanghai 200433, People's Republic of China
- Tongji University School of Medicine, 1239 Si-Ping Road, Shanghai 200092, People's Republic of China
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Haas R, Nikel PI. Challenges and opportunities in bringing nonbiological atoms to life with synthetic metabolism. Trends Biotechnol 2023; 41:27-45. [PMID: 35786519 DOI: 10.1016/j.tibtech.2022.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 06/05/2022] [Accepted: 06/09/2022] [Indexed: 02/06/2023]
Abstract
The relatively narrow spectrum of chemical elements within the microbial 'biochemical palate' limits the reach of biotechnology, because several added-value compounds can only be produced with traditional organic chemistry. Synthetic biology offers enabling tools to tackle this issue by facilitating 'biologization' of non-canonical chemical atoms. The interplay between xenobiology and synthetic metabolism multiplies routes for incorporating nonbiological atoms into engineered microbes. In this review, we survey natural assimilation routes for elements beyond the essential biology atoms [i.e., carbon (C), hydrogen (H), nitrogen (N), oxygen (O), phosphorus (P), and sulfur (S)], discussing how these mechanisms could be repurposed for biotechnology. Furthermore, we propose a computational framework to identify chemical elements amenable to biologization, ranking reactions suitable to build synthetic metabolism. When combined and deployed in robust microbial hosts, these approaches will offer sustainable alternatives for smart chemical production.
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Affiliation(s)
- Robert Haas
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
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7
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Celebi D, Taghizadehghalehjoughi A, Baser S, Genc S, Yilmaz A, Yeni Y, Yesilyurt F, Yildirim S, Bolat I, Kordali S, Yilmaz F, Hacimuftuoglu A, Celebi O, Margina D, Nitulescu GM, Spandidos DA, Tsatsakis A. Effects of boric acid and potassium metaborate on cytokine levels and redox stress parameters in a wound model infected with methicillin‑resistant Staphylococcus aureus. Mol Med Rep 2022; 26:294. [PMID: 35920188 PMCID: PMC9366158 DOI: 10.3892/mmr.2022.12809] [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: 02/12/2022] [Accepted: 06/23/2022] [Indexed: 11/14/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) infections are usually found in hospital settings and, frequently, in patients with open wounds. One of the most critical virulence factors affecting the severity and recurrence of infections is the biofilm; increasing antibiotic resistance due to biofilm formation has led to the search for alternative compounds to antibiotics. The present study aimed to use boric acid and potassium metaborate against MRSA infection in a fibroblast wound model. For this purpose, a two-part experiment was designed: First, MRSA strains were used for the test, and both boric acid and potassium metaborate were prepared in microdilution. In the second step, an MRSA wound model was prepared using a fibroblast culture, and treatments with boric acid and potassium metaborate were applied for 24 h. For the evaluation of the effects of treatment, cell viability assay (MTT assay), analysis of redox stress parameters, including total oxidant status and total antioxidant capacity analyses, lactate dehydrogenase analysis and immunohistochemical staining were performed. In addition, IL-1β and IL-10 gene expression levels were assayed. According to the results, potassium metaborate was more effective and exhibited a lower toxicity to fibroblast cells compared to boric acid; moreover, potassium metaborate decreased the level of prooxidant species and increased the antioxidant status more effectively than boric acid. The IL-1β level in the bacteria group was high; however, boric acid and potassium metaborate significantly decreased the expression levels of inflammatory markers, exhibiting the potential to improve the resolution of the lesion. On the whole, the findings of the present study suggest that boric acid and potassium metaborate may be effective on the tested microorganisms.
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Affiliation(s)
- Demet Celebi
- Department of Microbiology, Faculty of Veterinary Medicine, Ataturk University, 25240 Erzurum, Turkey
| | | | - Sumeyye Baser
- Department of Medical Microbiology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Sidika Genc
- Department of Medical Pharmacology, Faculty of Medicine, Seyh Edebali University, 11000 Bilecik, Turkey
| | - Aysegul Yilmaz
- Department of Medical Pharmacology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Yesim Yeni
- Department of Medical Pharmacology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Fatma Yesilyurt
- Department of Medical Pharmacology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Serkan Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Ismail Bolat
- Department of Pathology, Faculty of Veterinary Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Saban Kordali
- Department of Plant Protection, Fethiye Faculty of Agriculture, Mugla Sitki Kocman University, 48000 Mugla, Turkey
| | - Ferah Yilmaz
- Department of Plant Protection, Fethiye Faculty of Agriculture, Mugla Sitki Kocman University, 48000 Mugla, Turkey
| | - Ahmet Hacimuftuoglu
- Department of Medical Pharmacology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Ozgur Celebi
- Department of Medical Microbiology, Faculty of Medicine, Ataturk University, 25240 Erzurum, Turkey
| | - Denisa Margina
- Department of Pharmacy, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 020956 Bucharest, Romania
| | - George Mihai Nitulescu
- Department of Pharmacy, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 020956 Bucharest, Romania
| | - Demetrios A Spandidos
- Laboratory of Clinical Virology, Faculty of Medicine, University of Crete, 71003 Heraklion, Greece
| | - Aristidis Tsatsakis
- Department of Forensic Sciences and Toxicology, Faculty of Medicine, University of Crete, 71003 Heraklion, Greece
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Toopaang W, Bunnak W, Srisuksam C, Wattananukit W, Tanticharoen M, Yang YL, Amnuaykanjanasin A. Microbial polyketides and their roles in insect virulence: from genomics to biological functions. Nat Prod Rep 2022; 39:2008-2029. [PMID: 35822627 DOI: 10.1039/d1np00058f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: May 1966 up to January 2022Entomopathogenic microorganisms have potential for biological control of insect pests. Their main secondary metabolites include polyketides, nonribosomal peptides, and polyketide-nonribosomal peptide (PK-NRP) hybrids. Among these secondary metabolites, polyketides have mainly been studied for structural identification, pathway engineering, and for their contributions to medicine. However, little is known about the function of polyketides in insect virulence. This review focuses on the role of bacterial and fungal polyketides, as well as PK-NRP hybrids in insect infection and killing. We also discuss gene distribution and evolutional relationships among different microbial species. Further, the role of microbial polyketides and the hybrids in modulating insect-microbial symbiosis is also explored. Understanding the mechanisms of polyketides in insect pathogenesis, how compounds moderate the host-fungus interaction, and the distribution of PKS genes across different fungi and bacteria will facilitate the discovery and development of novel polyketide-derived bio-insecticides.
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Affiliation(s)
- Wachiraporn Toopaang
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand. .,Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, Academia Sinica and National Chung Hsing University, Taiwan.,Agricultural Biotechnology Research Center, Academia Sinica, Taipei 11529, Taiwan.
| | - Warapon Bunnak
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand.
| | - Chettida Srisuksam
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand.
| | - Wilawan Wattananukit
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand.
| | - Morakot Tanticharoen
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
| | - Yu-Liang Yang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 11529, Taiwan. .,Biotechnology Center in Southern Taiwan, Academia Sinica, Tainan 711010, Taiwan
| | - Alongkorn Amnuaykanjanasin
- National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand.
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Santos-Aberturas J, Vior NM. Beyond Soil-Dwelling Actinobacteria: Fantastic Antibiotics and Where to Find Them. Antibiotics (Basel) 2022; 11:195. [PMID: 35203798 PMCID: PMC8868522 DOI: 10.3390/antibiotics11020195] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/27/2022] [Accepted: 01/29/2022] [Indexed: 12/10/2022] Open
Abstract
Bacterial secondary metabolites represent an invaluable source of bioactive molecules for the pharmaceutical and agrochemical industries. Although screening campaigns for the discovery of new compounds have traditionally been strongly biased towards the study of soil-dwelling Actinobacteria, the current antibiotic resistance and discovery crisis has brought a considerable amount of attention to the study of previously neglected bacterial sources of secondary metabolites. The development and application of new screening, sequencing, genetic manipulation, cultivation and bioinformatic techniques have revealed several other groups of bacteria as producers of striking chemical novelty. Biosynthetic machineries evolved from independent taxonomic origins and under completely different ecological requirements and selective pressures are responsible for these structural innovations. In this review, we summarize the most important discoveries related to secondary metabolites from alternative bacterial sources, trying to provide the reader with a broad perspective on how technical novelties have facilitated the access to the bacterial metabolic dark matter.
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Affiliation(s)
| | - Natalia M. Vior
- Department of Molecular Microbiology, John Innes Centre, Norwich NR7 4UH, UK
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Identification of Translocation Inhibitors Targeting the Type III Secretion System of Enteropathogenic Escherichia coli. Antimicrob Agents Chemother 2021; 65:e0095821. [PMID: 34543097 DOI: 10.1128/aac.00958-21] [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: 11/20/2022] Open
Abstract
Infections with enteropathogenic Escherichia coli (EPEC) cause severe diarrhea in children. The noninvasive bacteria adhere to enterocytes of the small intestine and use a type III secretion system (T3SS) to inject effector proteins into host cells to modify and exploit cellular processes in favor of bacterial survival and replication. Several studies have shown that the T3SSs of bacterial pathogens are essential for virulence. Furthermore, the loss of T3SS-mediated effector translocation results in increased immune recognition and clearance of the bacteria. The T3SS is, therefore, considered a promising target for antivirulence strategies and novel therapeutics development. Here, we report the results of a high-throughput screening assay based on the translocation of the EPEC effector protein Tir (translocated intimin receptor). Using this assay, we screened more than 13,000 small molecular compounds of six different compound libraries and identified three substances which showed a significant dose-dependent effect on translocation without adverse effects on bacterial or eukaryotic cell viability. In addition, these substances reduced bacterial binding to host cells, effector-dependent cell detachment, and abolished attaching and effacing lesion formation without affecting the expression of components of the T3SS or associated effector proteins. Moreover, no effects of the inhibitors on bacterial motility or Shiga-toxin expression were observed. In summary, we have identified three new compounds that strongly inhibit T3SS-mediated translocation of effectors into mammalian cells, which could be valuable as lead substances for treating EPEC and enterohemorrhagic E. coli infections.
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Bhat MA, Mishra AK, Bhat MA, Banday MI, Bashir O, Rather IA, Rahman S, Shah AA, Jan AT. Myxobacteria as a Source of New Bioactive Compounds: A Perspective Study. Pharmaceutics 2021; 13:1265. [PMID: 34452226 PMCID: PMC8401837 DOI: 10.3390/pharmaceutics13081265] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 12/18/2022] Open
Abstract
Myxobacteria are unicellular, Gram-negative, soil-dwelling, gliding bacteria that belong to class δ-proteobacteria and order Myxococcales. They grow and proliferate by transverse fission under normal conditions, but form fruiting bodies which contain myxospores during unfavorable conditions. In view of the escalating problem of antibiotic resistance among disease-causing pathogens, it becomes mandatory to search for new antibiotics effective against such pathogens from natural sources. Among the different approaches, Myxobacteria, having a rich armor of secondary metabolites, preferably derivatives of polyketide synthases (PKSs) along with non-ribosomal peptide synthases (NRPSs) and their hybrids, are currently being explored as producers of new antibiotics. The Myxobacterial species are functionally characterized to assess their ability to produce antibacterial, antifungal, anticancer, antimalarial, immunosuppressive, cytotoxic and antioxidative bioactive compounds. In our study, we have found their compounds to be effective against a wide range of pathogens associated with the concurrence of different infectious diseases.
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Affiliation(s)
- Mudasir Ahmad Bhat
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | | | - Mujtaba Aamir Bhat
- Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Mohammad Iqbal Banday
- Department of Microbiology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Ommer Bashir
- Department of School Education, Jammu 181205, Jammu and Kashmir, India;
| | - Irfan A. Rather
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia;
| | - Safikur Rahman
- Department of Botany, MS College, BR Ambedkar Bihar University, Muzaffarpur 845401, Bihar, India;
| | - Ali Asghar Shah
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Arif Tasleem Jan
- Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
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Estevez-Fregoso E, Farfán-García ED, García-Coronel IH, Martínez-Herrera E, Alatorre A, Scorei RI, Soriano-Ursúa MA. Effects of boron-containing compounds in the fungal kingdom. J Trace Elem Med Biol 2021; 65:126714. [PMID: 33453473 DOI: 10.1016/j.jtemb.2021.126714] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/10/2020] [Accepted: 01/04/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND The number of known boron-containing compounds (BCCs) is increasing due to their identification in nature and innovative synthesis procedures. Their effects on the fungal kingdom are interesting, and some of their mechanisms of action have recently been elucidated. METHODS In this review, scientific reports from relevant chemistry and biomedical databases were collected and analyzed. RESULTS It is notable that several BCC actions in fungi induce social and economic benefits for humans. In fact, boric acid was traditionally used for multiple purposes, but some novel synthetic BCCs are effective antifungal agents, particularly in their action against pathogen species, and some were recently approved for use in humans. Moreover, most reports testing BCCs in fungal species suggest a limiting effect of these compounds on some vital reactions. CONCLUSIONS New BCCs have been synthesized and tested for innovative technological and biomedical emerging applications, and new interest is developing for discovering new strategic compounds that can act as environmental or wood protectors, as well as antimycotic agents that let us improve food acquisition and control some human infections.
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Affiliation(s)
- Elizabeth Estevez-Fregoso
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, 11340, Mexico
| | - Eunice D Farfán-García
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, 11340, Mexico.
| | - Itzel H García-Coronel
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, 11340, Mexico; Unidad de Investigación, Hospital Regional de Alta Especialidad Ixtapaluca, Carretera Federal México-Puebla km 34.5, C.P. 56530, Ixtapaluca, State of Mexico, Mexico
| | - Erick Martínez-Herrera
- Unidad de Investigación, Hospital Regional de Alta Especialidad Ixtapaluca, Carretera Federal México-Puebla km 34.5, C.P. 56530, Ixtapaluca, State of Mexico, Mexico
| | - Alberto Alatorre
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, 11340, Mexico
| | - Romulus I Scorei
- BioBoron Research Institute, Dunarii 31B Street, 207465, Podari, Romania
| | - Marvin A Soriano-Ursúa
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón, 11340, Mexico.
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13
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Bowden GD, Reis PM, Rogers MB, Bone Relat RM, Brayton KA, Wilson SK, Di Genova BM, Knoll LJ, Nepveux V FJ, Tai AK, Ramadhar TR, Clardy J, O'Connor RM. A conserved coccidian gene is involved in Toxoplasma sensitivity to the anti-apicomplexan compound, tartrolon E. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2020; 14:1-7. [PMID: 32738587 PMCID: PMC7394737 DOI: 10.1016/j.ijpddr.2020.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/20/2020] [Accepted: 07/23/2020] [Indexed: 12/23/2022]
Abstract
New treatments for the diseases caused by apicomplexans are needed. Recently, we determined that tartrolon E (trtE), a secondary metabolite derived from a shipworm symbiotic bacterium, has broad-spectrum anti-apicomplexan parasite activity. TrtE inhibits apicomplexans at nM concentrations in vitro, including Cryptosporidium parvum, Toxoplasma gondii, Sarcocystis neurona, Plasmodium falciparum, Babesia spp. and Theileria equi. To investigate the mechanism of action of trtE against apicomplexan parasites, we examined changes in the transcriptome of trtE-treated T. gondii parasites. RNA-Seq data revealed that the gene, TGGT1_272370, which is broadly conserved in the coccidia, is significantly upregulated within 4 h of treatment. Using bioinformatics and proteome data available on ToxoDB, we determined that the protein product of this tartrolon E responsive gene (trg) has multiple transmembrane domains, a phosphorylation site, and localizes to the plasma membrane. Deletion of trg in a luciferase-expressing T. gondii strain by CRISPR/Cas9 resulted in a 68% increase in parasite resistance to trtE treatment, supporting a role for the trg protein product in the response of T. gondii to trtE treatment. Trg is conserved in the coccidia, but not in more distantly related apicomplexans, indicating that this response to trtE may be unique to the coccidians, and other mechanisms may be operating in other trtE-sensitive apicomplexans. Uncovering the mechanisms by which trtE inhibits apicomplexans may identify shared pathways critical to apicomplexan parasite survival and advance the search for new treatments.
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Affiliation(s)
- Gregory D Bowden
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA
| | - Patricia M Reis
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA
| | - Maxwell B Rogers
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA
| | - Rachel M Bone Relat
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA
| | - Kelly A Brayton
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA
| | - Sarah K Wilson
- Department of Medical Microbiology and Immunology, University of Wisconsin - Madison, 1550 Linden Dr Madison, WI, 53706, USA
| | - Bruno Martorelli Di Genova
- Department of Medical Microbiology and Immunology, University of Wisconsin - Madison, 1550 Linden Dr Madison, WI, 53706, USA
| | - Laura J Knoll
- Department of Medical Microbiology and Immunology, University of Wisconsin - Madison, 1550 Linden Dr Madison, WI, 53706, USA
| | - Felix J Nepveux V
- Division of Geographic Medicine and Infectious Disease, Tufts Medical Center, 60 Tremont St 3rd Fl, Boston, MA, 02116, USA
| | - Albert K Tai
- Department of Immunology, Tufts University School of Medicine, 136 Harrison Ave, Boston, MA, 02111, USA
| | - Timothy R Ramadhar
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue C-213, Boston, MA, 02115, USA
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue C-213, Boston, MA, 02115, USA
| | - Roberta M O'Connor
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA, 99164-7040, USA.
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Secondary Metabolism in the Gill Microbiota of Shipworms (Teredinidae) as Revealed by Comparison of Metagenomes and Nearly Complete Symbiont Genomes. mSystems 2020; 5:5/3/e00261-20. [PMID: 32606027 PMCID: PMC7329324 DOI: 10.1128/msystems.00261-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We define a system in which the major symbionts that are important to host biology and to the production of secondary metabolites can be cultivated. We show that symbiotic bacteria that are critical to host nutrition and lifestyle also have an immense capacity to produce a multitude of diverse and likely novel bioactive secondary metabolites that could lead to the discovery of drugs and that these pathways are found within shipworm gills. We propose that, by shaping associated microbial communities within the host, the compounds support the ability of shipworms to degrade wood in marine environments. Because these symbionts can be cultivated and genetically manipulated, they provide a powerful model for understanding how secondary metabolism impacts microbial symbiosis. Shipworms play critical roles in recycling wood in the sea. Symbiotic bacteria supply enzymes that the organisms need for nutrition and wood degradation. Some of these bacteria have been grown in pure culture and have the capacity to make many secondary metabolites. However, little is known about whether such secondary metabolite pathways are represented in the symbiont communities within their hosts. In addition, little has been reported about the patterns of host-symbiont co-occurrence. Here, we collected shipworms from the United States, the Philippines, and Brazil and cultivated symbiotic bacteria from their gills. We analyzed sequences from 22 shipworm gill metagenomes from seven shipworm species and from 23 cultivated symbiont isolates. Using (meta)genome sequencing, we demonstrate that the cultivated isolates represent all the major bacterial symbiont species and strains in shipworm gills. We show that the bacterial symbionts are distributed among shipworm hosts in consistent, predictable patterns. The symbiotic bacteria harbor many gene cluster families (GCFs) for biosynthesis of bioactive secondary metabolites, only <5% of which match previously described biosynthetic pathways. Because we were able to cultivate the symbionts and to sequence their genomes, we can definitively enumerate the biosynthetic pathways in these symbiont communities, showing that ∼150 of ∼200 total biosynthetic gene clusters (BGCs) present in the animal gill metagenomes are represented in our culture collection. Shipworm symbionts occur in suites that differ predictably across a wide taxonomic and geographic range of host species and collectively constitute an immense resource for the discovery of new biosynthetic pathways corresponding to bioactive secondary metabolites. IMPORTANCE We define a system in which the major symbionts that are important to host biology and to the production of secondary metabolites can be cultivated. We show that symbiotic bacteria that are critical to host nutrition and lifestyle also have an immense capacity to produce a multitude of diverse and likely novel bioactive secondary metabolites that could lead to the discovery of drugs and that these pathways are found within shipworm gills. We propose that, by shaping associated microbial communities within the host, the compounds support the ability of shipworms to degrade wood in marine environments. Because these symbionts can be cultivated and genetically manipulated, they provide a powerful model for understanding how secondary metabolism impacts microbial symbiosis.
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15
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O’Connor RM, Nepveux V FJ, Abenoja J, Bowden G, Reis P, Beaushaw J, Bone Relat RM, Driskell I, Gimenez F, Riggs MW, Schaefer DA, Schmidt EW, Lin Z, Distel DL, Clardy J, Ramadhar TR, Allred DR, Fritz HM, Rathod P, Chery L, White J. A symbiotic bacterium of shipworms produces a compound with broad spectrum anti-apicomplexan activity. PLoS Pathog 2020; 16:e1008600. [PMID: 32453775 PMCID: PMC7274485 DOI: 10.1371/journal.ppat.1008600] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 06/05/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022] Open
Abstract
Apicomplexan parasites cause severe disease in both humans and their domesticated animals. Since these parasites readily develop drug resistance, development of new, effective drugs to treat infection caused by these parasites is an ongoing challenge for the medical and veterinary communities. We hypothesized that invertebrate-bacterial symbioses might be a rich source of anti-apicomplexan compounds because invertebrates are susceptible to infections with gregarines, parasites that are ancestral to all apicomplexans. We chose to explore the therapeutic potential of shipworm symbiotic bacteria as they are bona fide symbionts, are easily grown in axenic culture and have genomes rich in secondary metabolite loci [1,2]. Two strains of the shipworm symbiotic bacterium, Teredinibacter turnerae, were screened for activity against Toxoplasma gondii and one strain, T7901, exhibited activity against intracellular stages of the parasite. Bioassay-guided fractionation identified tartrolon E (trtE) as the source of the activity. TrtE has an EC50 of 3 nM against T. gondii, acts directly on the parasite itself and kills the parasites after two hours of treatment. TrtE exhibits nanomolar to picomolar level activity against Cryptosporidium, Plasmodium, Babesia, Theileria, and Sarcocystis; parasites representing all branches of the apicomplexan phylogenetic tree. The compound also proved effective against Cryptosporidium parvum infection in neonatal mice, indicating that trtE may be a potential lead compound for preclinical development. Identification of a promising new compound after such limited screening strongly encourages further mining of invertebrate symbionts for new anti-parasitic therapeutics.
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Affiliation(s)
- Roberta M. O’Connor
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
- * E-mail:
| | - Felix J. Nepveux V
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Jaypee Abenoja
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Gregory Bowden
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Patricia Reis
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Josiah Beaushaw
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Rachel M. Bone Relat
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Iwona Driskell
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Fernanda Gimenez
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington, United States of America
| | - Michael W. Riggs
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Deborah A. Schaefer
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona, United States of America
| | - Eric W. Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Daniel L. Distel
- Ocean Genome Legacy Center, Northeastern University, Nahant, Massachusetts, United States of America
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Cambridge, Massachusetts, United States of America
| | - Timothy R. Ramadhar
- Department of Chemistry, Howard University, Washington DC, United States of America
| | - David R. Allred
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Heather M. Fritz
- California Animal Health and Food Safety Lab, University of California, Davis, California, United States of America
| | - Pradipsinh Rathod
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
| | - Laura Chery
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
| | - John White
- Department of Chemistry, University of Washington, Seattle, Washington, United States of America
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16
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Altinoz MA, Topcu G, Elmaci İ. Boron's neurophysiological effects and tumoricidal activity on glioblastoma cells with implications for clinical treatment. Int J Neurosci 2019; 129:963-977. [PMID: 30885023 DOI: 10.1080/00207454.2019.1595618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Purpose: To define the actions of boron on normal neurophysiology and glioblastoma growth. Materials and Methods: PubMed and other relevant databases were searched. Results: Discovery of novel boron compounds in treatment of glioblastoma is being actively investigated, but the majority of such studies is focused on the synthesis of boron compounds as sensitizers to Boron Neutron Capture Therapy (BNCT). Nonetheless, the translational functionality of boron compounds is not limited to BNCT as many boron compounds possess direct tumoricidal activity and there is substantial evidence that certain boron compounds can cross the blood-brain barrier. Moreover, boron-containing compounds interfere with several tumorigenic pathways including intratumoral IGF-I levels, molybdenum Fe-S containing flavin hydroxylases, glycolysis, Transient Receptor Potential (TRP) and Store Operated Calcium Entry (SOCE) channels. Conclusions: Boron compounds deserve to be studied further in treatment of systemic cancers and glioblastoma due to their versatile antineoplastic functions.
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Affiliation(s)
- Meric A Altinoz
- Department of Medical Biochemistry, Acibadem University , Istanbul , Turkey.,Department of Psychiatry, Maastricht University , Holland , Turkey
| | - Gulacti Topcu
- Department of Pharmacognosy & Phytochemistry Faculty of Pharmacy, Bezmialem Vakif University , Istanbul , Turkey
| | - İlhan Elmaci
- Department of Neurosurgery, Acibadem Hospital , Istanbul , Turkey
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Surup F, Chauhan D, Niggemann J, Bartok E, Herrmann J, Keck M, Zander W, Stadler M, Hornung V, Müller R. Activation of the NLRP3 Inflammasome by Hyaboron, a New Asymmetric Boron-Containing Macrodiolide from the Myxobacterium Hyalangium minutum. ACS Chem Biol 2018; 13:2981-2988. [PMID: 30183250 DOI: 10.1021/acschembio.8b00659] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A Natural Compound Library containing myxobacterial secondary metabolites was screened in murine macrophages for novel activators of IL-1β maturation and secretion. The most potent of three hits in total was a so far undescribed metabolite, which was identified from the myxobacterium Hyalangium minutum strain Hym3. While the planar structure of 1 was elucidated by high resolution mass spectrometry and NMR data yielding an asymmetric boron containing a macrodiolide core structure, its relative stereochemistry of all 20 stereocenters of the 42-membered ring was assigned by rotating frame Overhause effect spectroscopy correlations, 1H,1H, and 1H,13C coupling constants, and by comparison of 13C chemical shifts to those of the structurally related metabolites tartrolon B-D. The absolute stereochemistry was subsequently assigned by Mosher's and Marfey's methods. Further functional studies revealed that hyaboron and other boronated natural compounds resulted in NLRP3 inflammasome dependent IL-1β maturation, which is most likely due to their ability to act as potassium ionophores. Moreover, besides its inflammasome-stimulatory activity in human and mouse cells, hyaboron (1) showed additional diverse biological activities, including antibacterial and antiparasitic effects.
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Affiliation(s)
- Frank Surup
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstraße 7, Braunschweig, 38124, Germany
| | - Dhruv Chauhan
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Feodor-Lynen-Straße 25, Munich, 81377, Germany
| | - Jutta Niggemann
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Eva Bartok
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, Sigmund-Freud-Straße 25, Bonn, 53127, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Department of Pharmacy, Saarland University Campus, Building E8.1, Saarbrücken, 66123, Germany
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstraße 7, Braunschweig, 38124, Germany
| | - Matthias Keck
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Wiebke Zander
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstraße 7, Braunschweig, 38124, Germany
| | - Veit Hornung
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Feodor-Lynen-Straße 25, Munich, 81377, Germany
- Center for Integrated Protein Science (CIPSM), Ludwig-Maximilians-Universität München, Munich, Feodor-Lynen-Straße 25, Munich, 81377, Germany
| | - Rolf Müller
- Department Microbial Drugs, Helmholtz Center for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Department of Pharmacy, Saarland University Campus, Building E8.1, Saarbrücken, 66123, Germany
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstraße 7, Braunschweig, 38124, Germany
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BORON PREPARATIONS IN PSYCHIATRY AND NEUROLOGY: THEIR RISE, FALL AND RENEWED INTEREST. ACTA BIOMEDICA SCIENTIFICA 2018. [DOI: 10.29413/abs.2018-3.4.13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The use of boron preparations (borax and boric acid) in medicine began long before their isolation in pure form. The mineral water of boron-containing sources has been historically used to treat skin diseases, to wash eyes, to disinfect wounds, etc. Also, what is of interest in the context of this article, boron-containing waters were used as calming, anti- anxiety, anticonvulsant and sleep-promoting remedy. In 1777, boric acid was first isolated from the mineral water of a healing spring source in Florence. Historically, first name of this compound was sal sedativum (“soothing salt”). However, the discovery of boron toxicity led to the cessation of its internal use. In recent decades, it has been found that boron is a microelement necessary for many metabolic processes in the body. It affects memory, cognitive functions, anxiety level, sleep, mood, regulates calcium and magnesium exchange, metabolism of vitamin D and sex steroids. It has been shown that some cases of treatment resistance to standard therapy, for example in epilepsy, anxiety and depression, are related to boron deficiency. In this regard, interest in the use of boron preparations in psychiatry and neurology, but in much smaller doses and on new scientific grounds, flared up again.
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Uluisik I, Karakaya HC, Koc A. The importance of boron in biological systems. J Trace Elem Med Biol 2018; 45:156-162. [PMID: 29173473 DOI: 10.1016/j.jtemb.2017.10.008] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 03/13/2017] [Accepted: 10/17/2017] [Indexed: 12/18/2022]
Abstract
Boron is an essential element for plants and probably essential for human and animal health. Boron has a broad range of physiological effects on biological systems at low concentrations, whereas it is toxic to at high concentrations. Eventhough there are many studies on boron's biological effects and toxicity, more information is needed to understand the mechanisms of its action. The aim of the current work is to review boron's function, transport and toxicity in different biological systems.
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Affiliation(s)
- Irem Uluisik
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Huseyin Caglar Karakaya
- Izmir Institute of Technology, Department of Molecular Biology and Genetics, 35430 Urla, Izmir, Turkey
| | - Ahmet Koc
- Inonu University, Medical School, Department of Medical Biology and Genetics, Battalgazi, Malatya, Turkey.
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20
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Jennifer Kan SB, Huang X, Gumulya Y, Chen K, Arnold FH. Genetically programmed chiral organoborane synthesis. Nature 2017; 552:132-136. [PMID: 29186119 PMCID: PMC5819735 DOI: 10.1038/nature24996] [Citation(s) in RCA: 199] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 11/02/2017] [Indexed: 12/20/2022]
Abstract
Recent advances in enzyme engineering and design have expanded nature's catalytic repertoire to functions that are new to biology. However, only a subset of these engineered enzymes can function in living systems. Finding enzymatic pathways that form chemical bonds that are not found in biology is particularly difficult in the cellular environment, as this depends on the discovery not only of new enzyme activities, but also of reagents that are both sufficiently reactive for the desired transformation and stable in vivo. Here we report the discovery, evolution and generalization of a fully genetically encoded platform for producing chiral organoboranes in bacteria. Escherichia coli cells harbouring wild-type cytochrome c from Rhodothermus marinus (Rma cyt c) were found to form carbon-boron bonds in the presence of borane-Lewis base complexes, through carbene insertion into boron-hydrogen bonds. Directed evolution of Rma cyt c in the bacterial catalyst provided access to 16 novel chiral organoboranes. The catalyst is suitable for gram-scale biosynthesis, providing up to 15,300 turnovers, a turnover frequency of 6,100 h-1, a 99:1 enantiomeric ratio and 100% chemoselectivity. The enantiopreference of the biocatalyst could also be tuned to provide either enantiomer of the organoborane products. Evolved in the context of whole-cell catalysts, the proteins were more active in the whole-cell system than in purified forms. This study establishes a DNA-encoded and readily engineered bacterial platform for borylation; engineering can be accomplished at a pace that rivals the development of chemical synthetic methods, with the ability to achieve turnovers that are two orders of magnitude (over 400-fold) greater than those of known chiral catalysts for the same class of transformation. This tunable method for manipulating boron in cells could expand the scope of boron chemistry in living systems.
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Affiliation(s)
| | | | - Yosephine Gumulya
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 210-41, Pasadena, CA 91125, United States
| | - Kai Chen
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 210-41, Pasadena, CA 91125, United States
| | - Frances H. Arnold
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 210-41, Pasadena, CA 91125, United States
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Hida A, Oku S, Nakashimada Y, Tajima T, Kato J. Identification of boric acid as a novel chemoattractant and elucidation of its chemoreceptor in Ralstonia pseudosolanacearum Ps29. Sci Rep 2017; 7:8609. [PMID: 28819159 PMCID: PMC5561266 DOI: 10.1038/s41598-017-09176-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/17/2017] [Indexed: 11/28/2022] Open
Abstract
Chemotaxis enables bacteria to move toward more favorable environmental conditions. We observed chemotaxis toward boric acid by Ralstonia pseudosolanacearum Ps29. At higher concentrations, the chemotactic response of R. pseudosolanacearum toward boric acid was comparable to or higher than that toward L-malate, indicating that boric acid is a strong attractant for R. pseudosolanacearum. Chemotaxis assays under different pH conditions suggested that R. pseudosolanacearum recognizes B(OH)3 (or B(OH3) + B(OH)4−) but not B(OH)4− alone. Our previous study revealed that R. pseudosolanacearum Ps29 harbors homologs of all 22R. pseudosolanacearum GMI1000 mcp genes. Screening of 22 mcp single-deletion mutants identified the RS_RS17100 homolog as the boric acid chemoreceptor, which was designated McpB. The McpB ligand-binding domain (LBD) was purified in order to characterize its binding to boric acid. Using isothermal titration calorimetry, we demonstrated that boric acid binds directly to the McpB LBD with a KD (dissociation constant) of 5.4 µM. Analytical ultracentrifugation studies revealed that the McpB LBD is present as a dimer that recognizes one boric acid molecule.
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Affiliation(s)
- Akiko Hida
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8530, Japan
| | - Shota Oku
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8530, Japan
| | - Yutaka Nakashimada
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8530, Japan
| | - Takahisa Tajima
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8530, Japan
| | - Junichi Kato
- Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8530, Japan.
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Metal and metalloid containing natural products and a brief overview of their applications in biology, biotechnology and biomedicine. Biometals 2015; 29:1-13. [DOI: 10.1007/s10534-015-9892-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 10/29/2015] [Indexed: 10/22/2022]
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Jones OAH, Dias DA, Callahan DL, Kouremenos KA, Beale DJ, Roessner U. The use of metabolomics in the study of metals in biological systems. Metallomics 2015; 7:29-38. [DOI: 10.1039/c4mt00123k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metabolomics and systems biology/toxicology can elucidate novel pathways and mechanistic networks of metals and metalloids in biological systems, as well as providing useful biomarkers of the metal status of organisms.
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Affiliation(s)
| | - Daniel A. Dias
- Metabolomics Australia
- School of Botany
- The University of Melbourne
- Parkville, Australia
| | - Damien L. Callahan
- Centre for Chemistry and Biotechnology
- School of Life and Environmental Sciences
- Deakin University
- Melbourne VIC 3125, Australia
| | - Konstantinos A. Kouremenos
- Metabolomics Australia
- Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- , Australia
| | - David J. Beale
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
- Land and Water
- Highett, Australia
| | - Ute Roessner
- Metabolomics Australia
- School of Botany
- The University of Melbourne
- Parkville, Australia
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Avery MA, Choudhry SC, Dhingra OP, Gray BD, Kang MC, Kuo SC, Vedananda TR, White JD, Whittle AJ. Total synthesis of macrodiolide ionophores aplasmomycin A and boromycin via double ring contraction. Org Biomol Chem 2014; 12:9116-32. [PMID: 25096282 DOI: 10.1039/c4ob01017e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The half structure of the symmetrical macrodiolide aplasmomycin A was synthesized by alkylation of a C3-C10 α-sulfonyl ketone subunit, prepared from (R)-pulegone and protected as a C3 ortholactone with (2R,3R)-butanediol, by a protected 15,16-dihydroxy (12E)-allylic chloride representing C11-C17. The latter was obtained from (2S,3R)-1,2-epoxy-3-butanol and propargyl alcohol. Regio- and stereoselective 5-exo-trig cyclization of the ene diol moiety in this segment, mediated by N-bromosuccinimide, led to the (2R,3S,5R)-tetrahydrofuran substructure of aplasmomycin A. Attachment of an α-acetic ester at the C3 carboxylic acid and esterification of the 3'-hydroxyl group of the tetrahydrofuran as its α-bromoacetate enabled coupling of two aplasmomycin half structures as an α-acyloxy acetate. Mukaiyama macrolactonization of this hydroxy acid afforded a symmetrical 36-membered diolide. Base-mediated double Chan rearrangement of this bis α-acyloxy dilactone caused ring contraction to the 34-membered macrocycle of desboroaplasmomycin A while generating the transannular 2-hydroxy-3-hemiketal motif of the natural product in the correct configuration. Final incorporation of boron into the tetraol core produced aplasmomycin A, isolated as its sodium borate. Extension of this route to the unsymmetrical macrodiolide boromycin was accomplished by modifications that included reversal of C12-C13 olefin geometry to (Z) for the southern half structure along with stereoselective hydride reductions of the C9 ketone that produced (9R) and (9S) alcohols for northern and southern half structures, respectively. Coupling of these half structures was made using an α-acyloxy ester linkage as for aplasmomycin A, but ring closure in this case was orchestrated via a blocked C16 alcohol that left open the C15 hydroxyl group of the southern half for Mukaiyama macrolactonization. A double Chan rearrangement of the resulting 35-membered macrocycle produced the 33-membered diolide of desborodesvalinylboromycin which had been obtained previously by degradation of natural boromycin. Insertion of boron into the tetraol core followed by esterification of the C16 alcohol with a masked d-valine and final deprotection furnished boromycin as its zwitterionic (Böeseken) complex.
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Affiliation(s)
- Mitchell A Avery
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, USA.
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Abstract
Covering: up to the end of 2013. Myxobacteria produce a vast range of structurally diverse natural products with prominent biological activities. Here, we provide a detailed description and judge the potential of all antibiotically active myxobacterial compounds as lead structures, pointing out their particularities and, if known, their mode of action. Thus, the review provides an overview of the potential of specific compounds, suitable for future investigations and possible clinical applications.
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Affiliation(s)
- Till F Schäberle
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany.
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Moraga NB, Poma HR, Amoroso MJ, Rajal VB. Isolation and characterization of indigenousStreptomycesandLentzeastrains from soils containing boron compounds in Argentina. J Basic Microbiol 2013; 54:568-77. [DOI: 10.1002/jobm.201200714] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 01/19/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Norma Beatriz Moraga
- Instituto de Investigaciones para la Industria Química (INIQUI); CONICET-UNSa; Salta Argentina
- Facultad de Ingeniería; Universidad Nacional de Salta; Salta Argentina
| | - Hugo Ramiro Poma
- Instituto de Investigaciones para la Industria Química (INIQUI); CONICET-UNSa; Salta Argentina
| | - María Julia Amoroso
- Planta de Procesos Industriales y Microbiológicos (PROIMI); CONICET; Tucumán Argentina
- Facultad de Bioquímica; Química y Farmacia, Universidad Nacional de Tucumán; Tucumán Argentina
| | - Verónica Beatriz Rajal
- Instituto de Investigaciones para la Industria Química (INIQUI); CONICET-UNSa; Salta Argentina
- Facultad de Ingeniería; Universidad Nacional de Salta; Salta Argentina
- Fogarty International Center; University of California in Davis; Davis CA USA
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Lançoni MD, Taketani RG, Kavamura VN, de Melo IS. Microbial community biogeographic patterns in the rhizosphere of two Brazilian semi-arid leguminous trees. World J Microbiol Biotechnol 2013; 29:1233-41. [PMID: 23435935 DOI: 10.1007/s11274-013-1286-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 02/08/2013] [Indexed: 11/25/2022]
Abstract
Arid environments are regular and well distributed over all continents and display drought characteristics whether full-time or seasonal. This study aims to characterize how the microbial communities of the rhizosphere of two leguminous trees from the Brazilian semi-arid biome the Caatinga are geographically and seasonally shaped, as well as the factors driving this variation. With that purpose, the soil rhizosphere from two leguminous trees (Mimosa tenuiflora and Piptadenia stipulacea (Benth.) Ducke) were sampled in two different seasons: rainy and drought at five different sites. Assessment of bacterial and archaeal communities occurred by T-RFLP analysis of 16S rRNA and archaeal amoA genes. By these means, it was observed that the seasons (wet and dry periods) are the factors that most influence the composition of the microbial community from both analyzed plants, except for the results obtained from the CCA applied to Archaeas. Furthermore, soil physical-chemical factors also had a significant influence on the community and indicated a geographical pattern of the bacterial community. It was not possible to observe significant modifications in the composition in relation to the plant species. We have seen that soil characteristics and rainfall were the factors that most influenced the microbial composition. Also, the bacterial community had a significant correlation with soil characteristics that indicates that these rhizosphere communities might be selected by environmental characteristics. Furthermore, the data suggest that climate plays a key role in structuring the microbial community of this biome.
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Affiliation(s)
- Milena Duarte Lançoni
- Environmental Microbiology Laboratory, Empresa Brasileira de Pesquisa Agropecuária, Rodovia SP-340 km 127.5, Jaguariúna, SP, 13820-000, Brazil.
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Boronated tartrolon antibiotic produced by symbiotic cellulose-degrading bacteria in shipworm gills. Proc Natl Acad Sci U S A 2013; 110:E295-304. [PMID: 23288898 DOI: 10.1073/pnas.1213892110] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Shipworms are marine wood-boring bivalve mollusks (family Teredinidae) that harbor a community of closely related Gammaproteobacteria as intracellular endosymbionts in their gills. These symbionts have been proposed to assist the shipworm host in cellulose digestion and have been shown to play a role in nitrogen fixation. The genome of one strain of Teredinibacter turnerae, the first shipworm symbiont to be cultivated, was sequenced, revealing potential as a rich source of polyketides and nonribosomal peptides. Bioassay-guided fractionation led to the isolation and identification of two macrodioloide polyketides belonging to the tartrolon class. Both compounds were found to possess antibacterial properties, and the major compound was found to inhibit other shipworm symbiont strains and various pathogenic bacteria. The gene cluster responsible for the synthesis of these compounds was identified and characterized, and the ketosynthase domains were analyzed phylogenetically. Reverse-transcription PCR in addition to liquid chromatography and high-resolution mass spectrometry and tandem mass spectrometry revealed the transcription of these genes and the presence of the compounds in the shipworm, suggesting that the gene cluster is expressed in vivo and that the compounds may fulfill a specific function for the shipworm host. This study reports tartrolon polyketides from a shipworm symbiont and unveils the biosynthetic gene cluster of a member of this class of compounds, which might reveal the mechanism by which these bioactive metabolites are biosynthesized.
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29
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Natural and synthetic small boron-containing molecules as potential inhibitors of bacterial and fungal quorum sensing. Chem Rev 2010; 111:209-37. [PMID: 21171664 DOI: 10.1021/cr100093b] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Weissman KJ, Müller R. Myxobacterial secondary metabolites: bioactivities and modes-of-action. Nat Prod Rep 2010; 27:1276-95. [DOI: 10.1039/c001260m] [Citation(s) in RCA: 225] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Pérez M, Crespo C, Schleissner C, Rodríguez P, Zúñiga P, Reyes F. Tartrolon D, a cytotoxic macrodiolide from the marine-derived actinomycete Streptomyces sp. MDG-04-17-069. JOURNAL OF NATURAL PRODUCTS 2009; 72:2192-2194. [PMID: 19968258 DOI: 10.1021/np9006603] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Exploration of marine-derived actinomycetes as a source of antitumor compounds has led to the isolation of a new member of the tartrolon series, tartrolon D (4). This new compound was obtained from Streptomyces sp. MDG-04-17-069 fermentation broths and displayed strong cytotoxic activity against three human tumor cell lines. Additionally, the known compound ikarugamycin (5) was also found in the culture broths of the same microorganism. The structure of this new tartrolon was established by a combination of spectroscopic techniques (1D and 2D NMR, HRMS, and UV) as well as by comparison with published data for similar compounds.
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Affiliation(s)
- Marta Pérez
- Medicinal Chemistry and Microbiology Departments, PharmaMar S.A., Pol. Ind. La Mina Norte, Avenida de los Reyes 1, 28770-Colmenar Viejo (Madrid), Spain
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32
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A brief tour of myxobacterial secondary metabolism. Bioorg Med Chem 2009; 17:2121-36. [DOI: 10.1016/j.bmc.2008.11.025] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Revised: 11/07/2008] [Accepted: 11/11/2008] [Indexed: 12/16/2022]
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33
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Rezanka T, Sigler K. Biologically active compounds of semi-metals. PHYTOCHEMISTRY 2008; 69:585-606. [PMID: 17991498 DOI: 10.1016/j.phytochem.2007.09.018] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Revised: 09/25/2007] [Accepted: 09/25/2007] [Indexed: 05/25/2023]
Abstract
Semi-metals (boron, silicon, arsenic and selenium) form organo-metal compounds, some of which are found in nature and affect the physiology of living organisms. They include, e.g., the boron-containing antibiotics aplasmomycin, borophycin, boromycin, and tartrolon or the silicon compounds present in "silicate" bacteria, relatives of the genus Bacillus, which release silicon from aluminosilicates through the secretion of organic acids. Arsenic is incorporated into arsenosugars and arsenobetaines by marine algae and invertebrates, and fungi and bacteria can produce volatile methylated arsenic compounds. Some prokaryotes can use arsenate as a terminal electron acceptor while others can utilize arsenite as an electron donor to generate energy. Selenium is incorporated into selenocysteine that is found in some proteins. Biomethylation of selenide produces methylselenide and dimethylselenide. Selenium analogues of amino acids, antitumor, antibacterial, antifungal, antiviral, anti-infective drugs are often used as analogues of important pharmacological sulfur compounds. Other metalloids, i.e. the rare and toxic tellurium and the radioactive short-lived astatine, have no biological significance.
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Affiliation(s)
- Tomás Rezanka
- Institute of Microbiology, Vídenská 1083, Prague 142 20, Czech Republic.
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34
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Řezanka T, Sigler K. Biologically Active Compounds Of Semi-Metals. BIOACTIVE NATURAL PRODUCTS (PART O) 2008. [DOI: 10.1016/s1572-5995(08)80018-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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35
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Ahmed I, Yokota A, Fujiwara T. Gracilibacillus boraciitolerans sp. nov., a highly boron-tolerant and moderately halotolerant bacterium isolated from soil. Int J Syst Evol Microbiol 2007; 57:796-802. [PMID: 17392209 DOI: 10.1099/ijs.0.64284-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A motile, Gram-positive, boron-tolerant and moderately halotolerant rod-shaped bacterium was isolated from a soil naturally high in boron minerals found in the Hisarcik area of Turkey. The novel isolate, designated T-16XT, produced spherical or ellipsoidal endospores in a non-bulging or slightly swollen sporangium in a terminal position and survived in a medium containing up to 450 mM boron. Whereas it tolerated 11 % (w/v) NaCl, it also grew without NaCl or boron. The temperature range for growth was 16–37 °C (optimum 25–28 °C) and the pH range for growth was 6.0–10.0 (optimum pH 7.5–8.5). The DNA G+C content was 35.8 mol% and the major cellular fatty acids were iso-C15 : 0and anteiso-C15 : 0at 18.2 and 45.7 % of the total fatty acids, respectively. MK-7 (90 %) was the predominant respiratory quinone system andmeso-diaminopimelic acid was the predominant diamino acid of the cell-wall peptidoglycan. Phylogenetic analysis of the 16S rRNA gene sequence revealed that the novel strain is closely related to the type strains ofGracilibacillus orientalis(96.7 % similarity),G. halotolerans(95.5 %) andG. dipsosauri(95.4 %). However, the maximum DNA hybridization value for this strain with these closely related strains was less than 26.2 %. On the basis of 16S rRNA gene sequence data and chemotaxonomic and physiological features, the organism T-16XT(=DSM 17256T=IAM 15263T=ATCC BAA-1190T) is proposed to be a member of the genusGracilibacillusas the type strain of the novel speciesGracilibacillus boraciitoleranssp. nov.
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Affiliation(s)
- Iftikhar Ahmed
- National Agricultural Research Centre, Park Road, Islamabad 45500, Pakistan
- Biotechnology Research Centre, University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Akira Yokota
- Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Toru Fujiwara
- SORST, JST, Chiyoda-ku, Tokyo, Japan
- Biotechnology Research Centre, University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo 113-8657, Japan
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36
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Vrettou M, Gray AA, Brewer AR, Barrett AG. Strategies for the synthesis of C2 symmetric natural products—a review. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.09.109] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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37
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38
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Wackett LP. Pathways to Discovering New Microbial Metabolism for Functional Genomics and Biotechnology. ADVANCES IN APPLIED MICROBIOLOGY 2007; 61:219-32. [PMID: 17448790 DOI: 10.1016/s0065-2164(06)61005-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Lawrence P Wackett
- Department of Biochemistry, Molecular Biology and Biophysics and BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, USA
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39
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Kim YJ, Lee D. Synthesis of the entire framework of tartrolon B utilizing a silicon-tethered ring-closing metathesis strategy. Org Lett 2006; 8:5219-22. [PMID: 17078682 PMCID: PMC2518086 DOI: 10.1021/ol061952y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[Structure: see text] A tandem ring-closing metathesis (RCM) of silaketal-tethered dienynes gives rise to bicyclic siloxanes, which upon removal of the silicon tether afford dienediol skeletons with a stereodefined E,Z-1,3-diene motif. The implementation of this methodology has led to the construction of the entire C1-C21 linear carbon skeleton of tartrolon B.
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Affiliation(s)
- Yi Jin Kim
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA
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40
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Ahmed I, Yokota A, Fujiwara T. A novel highly boron tolerant bacterium, Bacillus boroniphilus sp. nov., isolated from soil, that requires boron for its growth. Extremophiles 2006; 11:217-24. [PMID: 17072687 DOI: 10.1007/s00792-006-0027-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2006] [Accepted: 08/31/2006] [Indexed: 11/25/2022]
Abstract
Three strains of gram-positive, motile, rod-shaped and boron (B)-tolerant bacterium were isolated from naturally B containing soil of Hisarcik area in the Kutahya Province, Turkey. The strains, designated as T-14A, T-15Z(T) and T-17s, produced spherical or ellipsoidal endospores in a terminal bulging sporangium. The strains required B for the growth and can tolerate more than 450 mM B. These also tolerated up to 7.0% (w/v) NaCl in the presence of 50 mM B in agar medium but grew optimally without NaCl. The temperature range for growth was 16-37 degrees C (optimal of 30 degrees C), whereas the pH range was 6.5-9.0 (optimal of 7.5-8.5). The DNA G + C content was 41.1-42.2 mol% and the predominant cellular fatty acid was iso-C(15:0). The major respiratory quinone system was detected as MK-7 and the diamino acid of the peptidoglycan was meso-diaminopimelic acid. Based on phenotypic and chemotaxonomic characteristics, phylogenetic analysis of 16S rRNA gene sequences data and DNA-DNA re-association values, we concluded that the three strains belong to a novel species of the genus Bacillus, the type strain of which is T-15Z(T) and for which we proposed the name, B. boroniphilus sp. nov. (DSM 17376(T) = IAM 15287(T) = ATCC BAA-1204(T)).
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Affiliation(s)
- Iftikhar Ahmed
- Biotechnology Research Centre, University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo, 113-8657, Japan.
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41
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Antibiotics from Gliding Bacteria, LXXV. Absolute Configuration and Biosynthesis of Tartrolon B, a Boron-Containing Macrodiolide from Sorangium cellulosum. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/jlac.199619960616] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Affiliation(s)
- Eun Joo Kang
- Department of Chemistry, College of Natural Sciences, Seoul National University, Korea
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43
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Affiliation(s)
- Lawrence P Wackett
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, USA.
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44
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Winzer K, Hardie KR, Williams P. LuxS and autoinducer-2: their contribution to quorum sensing and metabolism in bacteria. ADVANCES IN APPLIED MICROBIOLOGY 2004; 53:291-396. [PMID: 14696323 DOI: 10.1016/s0065-2164(03)53009-x] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Klaus Winzer
- Institute of Infection, Immunity and Inflammation, Queen's Medical Centre, C-Floor, West Block, Nottingham, NG7 2UH, U.K
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45
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Mulzer J, Berger M. Total Synthesis of the Boron-Containing Ion Carrier Antibiotic Macrodiolide Tartrolon B. J Org Chem 2004; 69:891-8. [PMID: 14750819 DOI: 10.1021/jo035391p] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of the boron-containing macrodiolide antibiotic tartrolon B is reported in full detail. Two convergent approaches to the target compound are described, the first of which eventually failed, due to sensitive functionality. In the second, successful route the key step was a stereoselective boron-mediated aldol addition of a bicyclic acetonide protected ketone to a diene-aldehyde. In this case the synthesis could be completed without major problems, using a Yamaguchi dimerization macrolactonization endgame.
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Affiliation(s)
- Johann Mulzer
- Institut für Organische Chemie, Universität Wien, Währinger Strasse 38, A-1090 Wien, Austria.
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46
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Hunt CD. Dietary boron: An overview of the evidence for its role in immune function. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/jtra.10041] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Negrete-Raymond AC, Weder B, Wackett LP. Catabolism of arylboronic acids by Arthrobacter nicotinovorans strain PBA. Appl Environ Microbiol 2003; 69:4263-7. [PMID: 12839810 PMCID: PMC165125 DOI: 10.1128/aem.69.7.4263-4267.2003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Arthrobacter sp. strain PBA metabolized phenylboronic acid to phenol. The oxygen atom in phenol was shown to be derived from the atmosphere using (18)O(2). 1-Naphthalene-, 2-naphthalene-, 3-cyanophenyl-, 2,5-fluorophenyl-, and 3-thiophene-boronic acids were also transformed to monooxygenated products. The oxygen atom in the product was bonded to the ring carbon atom originally bearing the boronic acid substituent with all the substrates tested.
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Affiliation(s)
- Ana C Negrete-Raymond
- Department of Biochemistry, Molecular Biology and Biophysics, Biotechnology Institute and Center for Molecular and Plant Genomics, University of Minnesota, 1479 Gortner Avenue, St. Paul, MN 55108, USA
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Abstract
No pharmaceutical based on boron has yet made it to market, but this may soon change. The new millennium has brought with it some unique classes of bioactive boron compounds that are sufficiently mature in development to be considered significant and timely advances in their respective chemotherapeutic areas. Because boron is seldom seen as a constituent of a bioactive agent, this review relates some of the pertinent biologic and physiologic properties of boron and then describes in detail those boron-based agents clearly visible on the therapeutic horizon. Highlighted agents include boronic acids and boron heterocycles as potent proteasome inhibitors, beta-lactamase inhibitors, dipeptidyl peptidase inhibitors, inositol trisphosphate receptor modulators, antibacterials, and antiestrogens. As these new agents are welcomed into the therapeutic armamentarium, others will surely follow and the prescribing clinician will already have an awareness and appreciation of the unique benefits that these compounds have to offer.
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Affiliation(s)
- M P Groziak
- Pharmaceutical Discovery Division, SRI International, Menlo Park, CA, USA.
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Boron Heterocycles as Platforms for Building New Bioactive Agents. PROGRESS IN HETEROCYCLIC CHEMISTRY 2000. [DOI: 10.1016/s0959-6380(00)80003-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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