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Ahad Hossain M, Sultana S, Alanazi MM, Hadni H, Bhat AR, Hasan I, Kawsar SM. In vitro antimicrobial, anticancer evaluation, and in silico studies of mannopyranoside analogs against bacterial and fungal proteins: Acylation leads to improved antimicrobial activity. Saudi Pharm J 2024; 32:102093. [PMID: 38737807 PMCID: PMC11087236 DOI: 10.1016/j.jsps.2024.102093] [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: 03/16/2024] [Accepted: 04/28/2024] [Indexed: 05/14/2024] Open
Abstract
Carbohydrate analogs are an important, well-established class of clinically useful medicinal agents that exhibit potent antimicrobial activity. Thus, we explored the various therapeutic potential of methyl α-D-mannopyranoside (MαDM) analogs, including their ability to synthesize and assess their antibacterial, antifungal, and anticancer properties; additionally, molecular docking, molecular dynamics simulation, and ADMET analysis were performed. The structure of the synthesized MαDM analogs was ascertained by spectroscopic techniques and physicochemical and elemental analysis. In vitro antimicrobial activity was assessed and revealed significant inhibitory effects, particularly against gram-negative bacteria along with the prediction of activity spectra for substances (PASS). Concurrently, MαDM analogs showed good results against antifungal pathogens and exhibited promising anticancer effects in vitro, demonstrating dose-dependent cytotoxicity against Ehrlich ascites carcinoma (EAC) cancer cells while sparing normal cells from compound 5, with an IC50 of 4511.65 µg/mL according to the MTT colorimetric assay. A structure-activity relationship (SAR) study revealed that hexose combined with the acyl chains of decanoyl (C-10) and benzenesulfonyl (C6H5SO2-) had synergistic effects on the bacteria and fungi that were examined. Molecular docking was performed against the Escherichia coli (6KZV) and Candida albicans (1EAG) proteins to acquire insights into the molecular interactions underlying the observed biological activities. The docking results were further supported by 100 ns molecular dynamics simulations, which provided a dynamic view of the stability and flexibility of complexes involving MαDM and its targets. In addition, ADMET analysis was used to evaluate the toxicological and pharmacokinetic profiles. Owing to their promising drug-like properties, these MαDM analogs exhibit potential as prospective therapeutic candidates for future development.
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Affiliation(s)
- Md. Ahad Hossain
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Shahin Sultana
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Mohammed M. Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Hanine Hadni
- LIMAS, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Ajmal R. Bhat
- Department of Chemistry, RTM Nagpur University, Nagpur 440033, India
| | - Imtiaj Hasan
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Sarkar M.A. Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
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Akter S, Alhatlani BY, Abdallah EM, Saha S, Ferdous J, Hossain ME, Ali F, Kawsar SMA. Exploring Cinnamoyl-Substituted Mannopyranosides: Synthesis, Evaluation of Antimicrobial Properties, and Molecular Docking Studies Targeting H5N1 Influenza A Virus. Molecules 2023; 28:8001. [PMID: 38138491 PMCID: PMC10745968 DOI: 10.3390/molecules28248001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/27/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
The pursuit of innovative combinations for the development of novel antimicrobial and antiviral medications has garnered worldwide interest among scientists in recent times. Monosaccharides and their glycosides, such as methyl α-d-mannopyranoside derivatives, play a significant role in the potential treatment of viral respiratory pathologies. This study was undertaken to investigate and assess the synthesis and spectral characterization of methyl α-d-mannopyranoside derivatives 2-6, incorporating various aliphatic and aromatic groups. The investigation encompassed comprehensive in vitro antimicrobial screening, examination of physicochemical properties, molecular docking analysis, molecular dynamics simulations, and pharmacokinetic predictions. A unimolar one-step cinnamoylation reaction was employed under controlled conditions to produce methyl 6-O-cinnamoyl-α-d-mannopyranoside 2, demonstrating selectivity at the C-6 position. This represented a pivotal step in the development of potential antimicrobial derivatives based on methyl α-d-mannopyranoside. Subsequently, four additional methyl 6-O-cinnamoyl-α-d-mannopyranoside derivatives were synthesized with reasonably high yields. The chemical structures of these novel analogs were confirmed through a thorough analysis of their physicochemical properties, elemental composition, and spectroscopic data. In vitro antimicrobial assays were conducted against six bacterial strains and two fungal strains, revealing promising antifungal properties of these methyl α-d-mannopyranoside derivatives in comparison to their antibacterial activity. Moreover, cytotoxicity testing revealed that the compounds are less toxic. Further supporting these findings, molecular docking studies were performed against the H5N1 influenza A virus, indicating significant binding affinities and nonbonding interactions with the target protein 6VMZ. Notably, compounds 4 (-7.2) and 6 (-7.0) exhibited the highest binding affinities. Additionally, a 100 ns molecular dynamics simulation was conducted to assess the stability of the complex formed between the receptor 6VMZ and methyl α-d-mannopyranoside derivatives under in silico physiological conditions. The results revealed a stable conformation and binding pattern within the stimulating environment. In silico pharmacokinetic and toxicity assessments of the synthesized molecules were performed using Osiris software (version 2.9.1). Compounds 4 and 6 demonstrated favorable computational and pharmacological activities, albeit with a low drug score, possibly attributed to their higher molecular weight and irritancy. In conclusion, this study showcases the synthesis and evaluation of methyl α-d-mannopyranoside derivatives as promising candidates for antimicrobial and antifungal agents. Molecular docking and dynamics simulations, along with pharmacological predictions, contribute to our understanding of their potential therapeutic utility, although further research may be warranted to address certain pharmacological aspects.
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Affiliation(s)
- Sabina Akter
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh; (S.A.); (J.F.)
| | - Bader Y. Alhatlani
- Unit of Scientific Research, Applied College, Qassim University, Buraydah 52571, Saudi Arabia
| | - Emad M. Abdallah
- Department of Science Laboratories, College of Science and Arts, Qassim University, ArRass 51921, Saudi Arabia;
| | - Supriyo Saha
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun 248007, Uttarakhand, India;
| | - Jannatul Ferdous
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh; (S.A.); (J.F.)
| | - Md Emdad Hossain
- Wazed Miah Science Research Centre, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh;
| | - Ferdausi Ali
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh;
| | - Sarkar M. A. Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh; (S.A.); (J.F.)
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Ahmmed F, Al-Mijalli SH, Abdallah EM, Eissa IH, Ali F, Bhat AR, Jamalis J, Ben Hadda T, Kawsar SMA. Galactoside-Based Molecule Enhanced Antimicrobial Activity through Acyl Moiety Incorporation: Synthesis and In Silico Exploration for Therapeutic Target. Pharmaceuticals (Basel) 2023; 16:998. [PMID: 37513910 PMCID: PMC10385442 DOI: 10.3390/ph16070998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
In this study, a series of galactoside-based molecules, compounds of methyl β-d-galactopyranoside (MDGP, 1), were selectively acylated using 2-bromobenzoyl chloride to obtain 6-O-(2-bromobenzoyl) substitution products, which were then transformed into 2,3,4-tri-O-6-(2-bromobenzoyl) compounds (2-7) with various nontraditional acyl substituents. The chemical structures of the synthesized analogs were characterized by spectroscopic methods and physicochemical and elemental data analyses. The antimicrobial activities of the compounds against five human pathogenic bacteria and two phyto-fungi were evaluated in vitro and it was found that the acyl moiety-induced synthesized analogs exhibited varying levels of antibacterial activity against different bacteria, with compounds 3 and 6 exhibiting broad-spectrum activity and compounds 2 and 5 exhibiting activity against specific bacteria. Compounds 3 and 6 were tested for MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentration) based on their activity. The synthesized analogs were also found to have potential as a source of new antibacterial agents, particularly against gram-positive bacteria. The antifungal results suggested that the synthesized analogs could be a potential source of novel antifungal agents. Moreover, cytotoxicity testing revealed that the compounds are less toxic. A structure-activity relationship (SAR) investigation revealed that the lauroyl chain [CH3(CH2)10CO-] and the halo-aromatic chain [3(/4)-Cl.C6H4CO-] in combination with sugar, had the most potent activity against bacterial and fungal pathogens. Density functional theory (DFT)-calculated thermodynamic and physicochemical parameters, and molecular docking, showed that the synthesized molecule may block dengue virus 1 NS2B/NS3 protease (3L6P). A 150 ns molecular dynamic simulation indicated stable conformation and binding patterns in a stimulating environment. In silico ADMET calculations suggested that the designed (MDGP, 1) had good drug-likeness values. In summary, the newly synthesized MDGP analogs exhibit potential antiviral activity and could serve as a therapeutic target for dengue virus 1 NS2B/NS3 protease.
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Affiliation(s)
- Faez Ahmmed
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Samiah Hamad Al-Mijalli
- Department of Biology, College of Sciences, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Emad M Abdallah
- Department of Science Laboratories, College of Science and Arts, Qassim University, Ar Rass 51921, Saudi Arabia
| | - Ibrahim H Eissa
- Pharmaceutical Medicinal Chemistry & Drug Design Department, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo 116884, Egypt
| | - Ferdausi Ali
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Ajmal R Bhat
- Department of Chemistry, RTM Nagpur University, Nagpur 440033, India
| | | | - Taibi Ben Hadda
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda 60000, Morocco
| | - Sarkar M A Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
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Munia NS, Alanazi MM, El Bakri Y, Alanazi AS, Mukhrish YE, Hasan I, Kawsar SMA. Uridine Derivatives: Synthesis, Biological Evaluation, and In Silico Studies as Antimicrobial and Anticancer Agents. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1107. [PMID: 37374310 DOI: 10.3390/medicina59061107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023]
Abstract
Nucleoside analogs are frequently used in the control of viral infections and neoplastic diseases. However, relatively few studies have shown that nucleoside analogs have antibacterial and antifungal activities. In this study, a fused pyrimidine molecule, uridine, was modified with various aliphatic chains and aromatic groups to produce new derivatives as antimicrobial agents. All newly synthesized uridine derivatives were analyzed by spectral (NMR, FTIR, mass spectrometry), elemental, and physicochemical analyses. Prediction of activity spectra for substances (PASS) and in vitro biological evaluation against bacteria and fungi indicated promising antimicrobial capability of these uridine derivatives. The tested compounds were more effective against fungal phytopathogens than bacterial strains, as determined by their in vitro antimicrobial activity. Cytotoxicity testing indicated that the compounds were less toxic. In addition, antiproliferative activity against Ehrlich ascites carcinoma (EAC) cells was investigated, and compound 6 (2',3'-di-O-cinnamoyl-5'-O-palmitoyluridine) demonstrated promising anticancer activity. Their molecular docking against Escherichia coli (1RXF) and Salmonella typhi (3000) revealed notable binding affinities and nonbonding interactions in support of this finding. Stable conformation and binding patterns/energy were found in a stimulating 400 ns molecular dynamics (MD) simulation. Structure-activity relationship (SAR) investigation indicated that acyl chains, CH3(CH2)10CO-, (C6H5)3C-, and C2H5C6H4CO-, combined with deoxyribose, were most effective against the tested bacterial and fungal pathogens. Pharmacokinetic predictions were examined to determine their ADMET characteristics, and the results in silico were intriguing. Finally, the synthesized uridine derivatives demonstrated increased medicinal activity and high potential for future antimicrobial/anticancer agent(s).
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Affiliation(s)
- Nasrin S Munia
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Mohammed M Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Youness El Bakri
- Department of Theoretical and Applied Chemistry, South Ural State University, Lenin prospect 76, Chelyabinsk 454080, Russia
| | - Ashwag S Alanazi
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Yousef E Mukhrish
- Department of Chemistry, Faculty of Science, Jazan University, P.O. Box 2097, Jazan 45142, Saudi Arabia
| | - Imtiaj Hasan
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Sarkar M A Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
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Hosen MA, Qais FA, Chtita S, Rahman IA, Almehdi AM, Ali F, Almalki FA, Hadda TB, Laaroussi H, Kawsar SMA. In silico and POM analysis for potential antimicrobial agents of thymidine analogs by using molecular docking, molecular dynamics and ADMET profiling. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2023; 42:877-918. [PMID: 37235455 DOI: 10.1080/15257770.2023.2215839] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 04/19/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023]
Abstract
Nucleoside analogs are an important, well-established class of clinically useful medicinal agents that exhibit potent antimicrobial activity. Thus, we designed to explore the synthesis and spectral characterization of 5'-O-(myristoyl)thymidine esters (2-6) for in vitro antimicrobial, molecular docking, molecular dynamics, SAR, and POM analyses. An unimolar myristoylation of thymidine under controlled conditions furnished the 5'-O-(myristoyl)thymidine and it was further converted into four 3'-O-(acyl)-5'-O-(myristoyl)thymidine analogs. The chemical structures of the synthesized analogs were ascertained by analyzing their physicochemical, elemental, and spectroscopic data. In vitro antimicrobial tests along with PASS, prediction indicated expectant antibacterial functionality of these thymidine esters compared to the antifungal activities. In support of this observation, their molecular docking studies have been performed against lanosterol 14α-demethylase (CYP51A1) and Aspergillus flavus (1R51) and significant binding affinities and non-bonding interactions were observed. The stability of the protein-ligand complexes was monitored by a 100 ns MD simulation and found the stable conformation and binding mode in a stimulating environment of thymidine esters. Pharmacokinetic predictions were studied to assess their ADMET properties and showed promising results in silico. SAR investigation indicated that acyl chains, lauroyl (C-12) and myristoyl (C-14), combined with deoxyribose, were most effective against the tested bacterial and fungal pathogens. The POM analyses provide the structural features responsible for their combined antibacterial/antifungal activity and provide guidelines for further modifications, with the aim of improving each activity and selectivity of designed drugs targeting potentially drug-resistant microorganisms. It also opens avenues for the development of newer antimicrobial agents targeting bacterial and fungal pathogens.
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Affiliation(s)
- Mohammed A Hosen
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, Bangladesh
| | - Faizan A Qais
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Samir Chtita
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M'Sik, Hassan II University of Casablanca, Casablanca, Morocco
| | - Ibrahim A Rahman
- Department of Chemistry, University of Sharjah, Sharjah, United Arab Emirates
| | - Ahmed M Almehdi
- Department of Chemistry, University of Sharjah, Sharjah, United Arab Emirates
| | - Ferdausi Ali
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, Chittagong, Bangladesh
| | - Faisal A Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Taibi B Hadda
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda, Morocco
| | - Hamid Laaroussi
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda, Morocco
| | - Sarkar M A Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, Bangladesh
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Design, Synthesis, In Silico and POM Studies for the Identification of the Pharmacophore Sites of Benzylidene Derivatives. Molecules 2023; 28:molecules28062613. [PMID: 36985587 PMCID: PMC10053039 DOI: 10.3390/molecules28062613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 03/16/2023] Open
Abstract
Due to the uneven distribution of glycosidase enzyme expression across bacteria and fungi, glycoside derivatives of antimicrobial compounds provide prospective and promising antimicrobial materials. Therefore, herein, we report the synthesis and characterization of six novel methyl 4,6-O-benzylidene-α-d-glucopyranoside (MBG) derivatives (2–7). The structures were ascertained using spectroscopic techniques and elemental analyses. Antimicrobial tests (zone of inhibition, MIC and MBC) were carried out to determine their ability to inhibit the growth of different Gram-positive, Gram-negative bacteria and fungi. The highest antibacterial activity was recorded with compounds 4, 5, 6 and 7. The compounds with the most significant antifungal efficacy were 4, 5, 6 and 7. Based on the prediction of activity spectra for substances (PASS), compounds 4 and 7 have promising antimicrobial capacity. Molecular docking studies focused on fungal and bacterial proteins where derivatives 3 and 6 exhibited strong binding affinities. The molecular dynamics study revealed that the complexes formed by these derivatives with the proteins L,D-transpeptidase Ykud and endoglucanase from Aspergillus niger remained stable, both over time and in physiological conditions. Structure–activity relationships, including in vitro and in silico results, revealed that the acyl chains [lauroyl-(CH3(CH2)10CO-), cinnamoyl-(C6H5CH=CHCO-)], in combination with sugar, were found to have the most potential against human and fungal pathogens. Synthetic, antimicrobial and pharmacokinetic studies revealed that MBG derivatives have good potential for antimicrobial activity, developing a therapeutic target for bacteria and fungi. Furthermore, the Petra/Osiris/Molinspiration (POM) study clearly indicated the presence of an important (O1δ−----O2δ−) antifungal pharmacophore site. This site can also be explored as a potential antiviral moiety.
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Ahmmed F, Islam AU, Mukhrish YE, Bakri YE, Ahmad S, Ozeki Y, Kawsar SMA. Efficient Antibacterial/Antifungal Activities: Synthesis, Molecular Docking, Molecular Dynamics, Pharmacokinetic, and Binding Free Energy of Galactopyranoside Derivatives. Molecules 2022; 28:molecules28010219. [PMID: 36615413 PMCID: PMC9822152 DOI: 10.3390/molecules28010219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/13/2022] [Accepted: 12/23/2022] [Indexed: 12/28/2022] Open
Abstract
The chemistry and biochemistry of carbohydrate esters are essential parts of biochemical and medicinal research. A group of methyl β-d-galactopyranoside (β-MGP, 1) derivatives was acylated with 3-bromobenzoyl chloride and 4-bromobenzoyl chloride in anhydrous N,N-dimethylformamide/triethylamine to obtain 6-O-substitution products, which were subsequently converted into 2,3,4-tri-O-acyl derivatives with different aliphatic and aromatic substituents. Spectroscopic and elemental data exploration of these derivatives confirmed their chemical structures. In vitro biological experiments against five bacteria and two fungi and the prediction of activity spectra for substances (PASS) revealed ascending antifungal and antibacterial activities compared with their antiviral activities. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) experiments were performed for two derivatives, 3 and 9, based on their antibacterial activities. Most of these derivatives showed >780% inhibition of fungal mycelial growth. Density functional theory (DFT) was used to calculate the chemical descriptors and thermodynamic properties, whereas molecular docking was performed against antibacterial drug targets, including PDB: 4QDI, 5A5E, 7D27, 1ZJI, 3K8E, and 2MRW, and antifungal drug targets, such as PDB: 1EA1 and 1AI9, to identify potential drug candidates for microbial pathogens. A 100 ns molecular dynamics simulation study revealed stable conformation and binding patterns in a stimulating environment by their uniform RMSD, RMSF, SASA, H-bond, and RoG profiles. In silico pharmacokinetic and quantitative structure−activity relationship (QSAR) calculations (pIC50 values 3.67~8.15) suggested that all the designed β-MGP derivatives exhibited promising results due to their improved kinetic properties with low aquatic and non-aquatic toxicities. These biological, structure−activity relationship (SAR) [lauroyl-(CH3(CH2)10CO-) group was found to have potential], and in silico computational studies revealed that the newly synthesized MGP derivatives are potential antibacterial/antifungal candidates and can serve as therapeutic targets for human and plant pathogens.
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Affiliation(s)
- Faez Ahmmed
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Anis Ul Islam
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Yousef E. Mukhrish
- Department of Chemistry, Faculty of Science, Jazan University, Jazan 45142, Saudi Arabia
| | - Youness El Bakri
- Department of Theoretical and Applied Chemistry, South Ural State University, Lenin Prospect 76, 454080 Chelyabinsk, Russia
| | - Sajjad Ahmad
- Department of Health and Biological Sciences, Abasyn University, Peshawar 25000, Pakistan
| | - Yasuhiro Ozeki
- School of Sciences, Yokohama City University, 22-2, Seto, Yokohama 236-0027, Japan
| | - Sarkar M. A. Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
- Correspondence: ; Tel.: +88-01762717081
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Avirdi E, Kamdem Paumo H, Pone Kamdem B, Babu Singh M, Kumari K, Maureen Katata-Seru L, Bahadur I. Influence of cation (imidazolium based ionic liquids) as “smart” stabilizers for silver nanoparticles and their evaluation as antibacterial activity on Escherichia coli, Staphylococcus aureus and Enterobacter cloacae. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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10
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Goncharova IK, Tukhvatshin RS, Novikov RA, Volodin AD, Korlyukov AA, Lakhtin VG, Arzumanyan A. Complementary Cooperative Catalytic Systems in the Aerobic Oxidation of a Wide Range of Si–H‐Reagents to Si–OH‐Products: From Monomers to Oligomers and Polymers. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200871] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Irina K. Goncharova
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Rinat S. Tukhvatshin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Roman A. Novikov
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Organic chemistry RUSSIAN FEDERATION
| | - Alexander D. Volodin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Alexander A. Korlyukov
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Valentin G. Lakhtin
- A V Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences: Institut neftehimiceskogo sinteza imeni A V Topcieva Rossijskaa akademia nauk Organoelements compounds RUSSIAN FEDERATION
| | - Ashot Arzumanyan
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Chemistry 28 Vavilov str. 119991 Moscow RUSSIAN FEDERATION
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Anowar Hosen M, Sultana Munia N, Al-Ghorbani M, Baashen M, Almalki FA, Ben Hadda T, Ali F, Mahmud S, Abu Saleh M, Laaroussi H, Kawsar SMA. Synthesis, antimicrobial, molecular docking and molecular dynamics studies of lauroyl thymidine analogs against SARS-CoV-2: POM study and identification of the pharmacophore sites. Bioorg Chem 2022; 125:105850. [PMID: 35533581 PMCID: PMC9065685 DOI: 10.1016/j.bioorg.2022.105850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/21/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022]
Abstract
Nucleoside precursors and nucleoside analogs occupy an important place in the treatment of viral respiratory pathologies, especially during the current COVID-19 pandemic. From this perspective, the present study has been designed to explore and evaluate the synthesis and spectral characterisation of 5́-O-(lauroyl) thymidine analogs 2–6 with different aliphatic and aromatic groups through comprehensive in vitro antimicrobial screening, cytotoxicity assessment, physicochemical aspects, molecular docking and molecular dynamics analysis, along with pharmacokinetic prediction. A unimolar one-step lauroylation of thymidine under controlled conditions furnished the 5́-O-(lauroyl) thymidine and indicated the selectivity at C-5́ position and the development of thymidine based potential antimicrobial analogs, which were further converted into four newer 3́-O-(acyl)-5́-O-(lauroyl) thymidine analogs in reasonably good yields. The chemical structures of the newly synthesised analogs were ascertained by analysing their physicochemical, elemental, and spectroscopic data. In vitro antimicrobial tests against five bacteria and two fungi, along with the prediction of activity spectra for substances (PASS), indicated promising antibacterial functionality for these thymidine analogs compared to antifungal activity. In support of this observation, molecular docking experiments have been performed against the main protease of SARS-CoV-2, and significant binding affinities and non-bonding interactions were observed against the main protease (6LU7, 6Y84 and 7BQY), considering hydroxychloroquine (HCQ) as standard. Moreover, the 100 ns molecular dynamics simulation process was performed to monitor the behaviour of the complex structure formed by the main protease under in silico physiological conditions to examine its stability over time, and this revealed a stable conformation and binding pattern in a stimulating environment of thymidine analogs. Cytotoxicity determination confirmed that compounds were found less toxic. Pharmacokinetic predictions were investigated to evaluate their absorption, distribution, metabolism and toxic properties, and the combination of pharmacokinetic and drug-likeness predictions has shown promising results in silico. The POM analysis shows the presence of an antiviral (O1δ-, O2δ-) pharmacophore site. Overall, the current study should be of great help in the development of thymidine-based, novel, multiple drug-resistant antimicrobial and COVID-19 drugs.
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Affiliation(s)
- Mohammed Anowar Hosen
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Nasrin Sultana Munia
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Mohammed Al-Ghorbani
- Department of Chemistry, Faculty of Science and Arts, Ulla, Taibah University, Medina, Saudi Arabia
| | - Mohammed Baashen
- Department of Chemistry, Science and Humanities College, Shaqra University, Saudi Arabia
| | - Faisal A Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Taibi Ben Hadda
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, 21955 Makkah, Saudi Arabia; Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, MB 524, 60000 Oujda, Morocco
| | - Ferdausi Ali
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, V, Bangladesh
| | - Shafi Mahmud
- Microbiology Laboratory, Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Md Abu Saleh
- Microbiology Laboratory, Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Hamid Laaroussi
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, MB 524, 60000 Oujda, Morocco
| | - Sarkar M A Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh.
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12
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Munia NS, Hosen MA, Azzam KMA, Al-Ghorbani M, Baashen M, Hossain MK, Ali F, Mahmud S, Shimu MSS, Almalki FA, Hadda TB, Laaroussi H, Naimi S, Kawsar SMA. Synthesis, antimicrobial, SAR, PASS, molecular docking, molecular dynamics and pharmacokinetics studies of 5'- O-uridine derivatives bearing acyl moieties: POM study and identification of the pharmacophore sites. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2022; 41:1036-1083. [PMID: 35797068 DOI: 10.1080/15257770.2022.2096898] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/08/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Because of their superior antibacterial and pharmacokinetic capabilities, many nucleoside-based esters show potential against microorganisms, and may be used as pharmacological agents to address multidrug-resistant pathogenic problems. In this study, several aliphatic and aromatic groups were inserted to synthesize various 5'-O-decanoyluridine (2-5) and 5'-O-lauroyluridine derivatives (6-7) for antimicrobial, in silico computational, pharmacokinetic and POM (Petra/Osiris/Molinspiration). The chemical structures of the synthesized uridine derivatives were confirmed by physicochemical, elemental, and spectroscopic analyses. In vitro antimicrobial screening against five bacteria and two fungi, as well as the prediction of substance activity spectra (PASS), revealed that these uridine derivatives have promising antifungal properties when compared to the antibacterial activities. Density functional theory (DFT) was used to calculate the thermodynamic and physicochemical properties. Molecular docking was conducted against lanosterol 14a-demethylase CYP51A1 (3JUV) and Aspergillus flavus (1R4U) and revealed binding affinities and non-covalent interactions with the target. Then, a 150 ns molecular dynamic simulation was performed to confirm the behavior of the complex structure formed by microbial protein under in silico physiological conditions to examine its stability over time, which revealed a stable conformation and binding pattern in a stimulating environment of uridine derivatives. The acyl chain {CH3(CH2)9CO-} and {CH3(CH2)10CO-} in conjunction with sugar, was determined to have the most potent activity against bacterial and fungal pathogens in a structure-activity relationships (SAR) investigation. POM analyses were conducted with the presence of an antifungal (O δ- -- O' δ-) pharmacophore site. Overall, the present study might be useful for the development of uridine-based novel multidrug-resistant antimicrobial.
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Affiliation(s)
- Nasrin S Munia
- Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, Bangladesh
| | - Mohammed A Hosen
- Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, Bangladesh
| | - Khaldun M A Azzam
- Pharmacological and Diagnostic Research Center (PDRC), Department of Pharmaceutical Sciences, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman, Jordan
| | - Mohammed Al-Ghorbani
- Department of Chemistry, Faculty of Science and Arts, Ulla, Taibah University, Medina, Saudi Arabia
| | - Mohammed Baashen
- Department of Chemistry, Science and Humanities College, Shaqra University, Shaqra, KSA
| | - Mohammed K Hossain
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong, Bangladesh
| | - Ferdausi Ali
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, Chittagong, Bangladesh
| | - Shafi Mahmud
- Department of Genome Science, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Mst S S Shimu
- Microbiology Laboratory, Department of Genetic Engineering and Biotechnology, University of Rajshahi, Rajshahi, Bangladesh
| | - Faisal A Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Taibi B Hadda
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda, Morocco
| | - Hamid Laaroussi
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda, Morocco
| | - Souad Naimi
- Department of Biological Sciences, Sanofi-Aventis, Vitry, France
| | - Sarkar M A Kawsar
- Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, Bangladesh
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13
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Islam S, Hosen MA, Ahmad S, ul Qamar MT, Dey S, Hasan I, Fujii Y, Ozeki Y, Kawsar SM. Synthesis, antimicrobial, anticancer activities, PASS prediction, molecular docking, molecular dynamics and pharmacokinetic studies of designed methyl α-D-glucopyranoside esters. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132761] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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Rana KM, Maowa J, Alam A, Dey S, Hosen A, Hasan I, Fujii Y, Ozeki Y, Kawsar SMA. In silico DFT study, molecular docking, and ADMET predictions of cytidine analogs with antimicrobial and anticancer properties. In Silico Pharmacol 2021; 9:42. [PMID: 34295612 PMCID: PMC8260667 DOI: 10.1007/s40203-021-00102-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 06/30/2021] [Indexed: 01/08/2023] Open
Abstract
Nucleoside analogs contribute in pharmaceutical and clinical fields as medicinal agents and approved drugs. This work focused to investigate the antimicrobial, anticancer activities, and structure-activity relationship (SAR) of cytidine and its analogs with computational studies. Microdilution was used to determine the antimicrobial activity, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC) of the modified analogs against human and phytopathogenic strains. Compounds (7), (10), and (14) were the most potent against Escherichia coli and Salmonella abony strains with MIC and MBC values from 0.316 ± 0.02 to 2.50 ± 0.03 and 0.625 ± 0.04 to 5.01 ± 0.06 mg/ml, respectively. The highest inhibitory activity was observed against gram-positive bacteria. Numerous analogs (10), (13), (14), and (15) exhibited good activity against the tested fungi Aspergillus niger and Aspergillus flavus. Anticancer activity of the cytidine analogs was examined through MTT colorimetric assay against Ehrlich's ascites carcinoma (EAC) tumor cells whereas compound 6 showed the maximum antiproliferative activity with an IC50 value of 1168.97 µg/ml. To rationalize this observation, their quantum mechanical and molecular docking studies have been performed against urate oxidase of A. flavus 1R51 to investigate the binding mode, binding affinity, and non-bonding interactions. It was observed that most of the analogs exhibited better binding properties than the parent drug. In silico ADMET prediction was attained to evaluate the drug-likeness properties that revealed the improved pharmacokinetic profile with lower acute oral toxicity of cytidine analogs. Based on the in vitro and in silico analysis, this exploration can be useful to develop promising cytidine-based antimicrobial drug(s). SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s40203-021-00102-0.
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Affiliation(s)
- Kazi M. Rana
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331 Bangladesh
| | - Jannatul Maowa
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331 Bangladesh
| | - Asraful Alam
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331 Bangladesh
| | - Sujan Dey
- Department of Microbiology, Faculty of Biological Science, University of Chittagong, Chittagong, 4331 Bangladesh
| | - Anowar Hosen
- Centre for Advanced Research in Sciences, University of Dhaka, Dhaka, 1000 Bangladesh
| | - Imtiaj Hasan
- Department of Biochemistry and Molecular Biology, Faculty of Science, University of Rajshahi, Rajshahi, 6205 Bangladesh
| | - Yuki Fujii
- Laboratory of Functional Morphology, Graduate School of Pharmaceutical Sciences, Nagasaki International University, Nagasaki, 859-3298 Japan
| | - Yasuhiro Ozeki
- Laboratory of Glycobiology and Marine Biochemistry, Department of Life and Environmental System Science, Graduate School of NanoBiosciences, Yokohama City University, Yokohama, 236-0027 Japan
| | - Sarkar M. A. Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry (LCNC), Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331 Bangladesh
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15
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Sarai N, Levin BJ, Roberts JM, Katsoulis DE, Arnold FH. Biocatalytic Transformations of Silicon-the Other Group 14 Element. ACS CENTRAL SCIENCE 2021; 7:944-953. [PMID: 34235255 PMCID: PMC8227617 DOI: 10.1021/acscentsci.1c00182] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Indexed: 05/30/2023]
Abstract
Significant inroads have been made using biocatalysts to perform new-to-nature reactions with high selectivity and efficiency. Meanwhile, advances in organosilicon chemistry have led to rich sets of reactions holding great synthetic value. Merging biocatalysis and silicon chemistry could yield new methods for the preparation of valuable organosilicon molecules as well as the degradation and valorization of undesired ones. Despite silicon's importance in the biosphere for its role in plant and diatom construction, it is not known to be incorporated into any primary or secondary metabolites. Enzymes have been found that act on silicon-containing molecules, but only a few are known to act directly on silicon centers. Protein engineering and evolution has and could continue to enable enzymes to catalyze useful organosilicon transformations, complementing and expanding upon current synthetic methods. The role of silicon in biology and the enzymes that act on silicon-containing molecules are reviewed to set the stage for a discussion of where biocatalysis and organosilicon chemistry may intersect.
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Affiliation(s)
- Nicholas
S. Sarai
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
| | - Benjamin J. Levin
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
| | - John M. Roberts
- Dow
Inc., Core R&D, 633 Washington Street, Midland, Michigan 48667, United
States
| | - Dimitris E. Katsoulis
- Dow
Silicones Corporation, 2200 West Salzburg Road, Auburn, Michigan 48611, United
States
| | - Frances H. Arnold
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
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16
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Lv H, Laishram RD, Chen J, Khan R, Zhu Y, Wu S, Zhang J, Liu X, Fan B. Photocatalyzed cross-dehydrogenative coupling of silanes with alcohols and water. Chem Commun (Camb) 2021; 57:3660-3663. [PMID: 33724277 DOI: 10.1039/d1cc00129a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient method for the dehydrogenative coupling of silanes with alcohols under photocatalysis was developed. The reaction proceeded in the presence of Ru(bpy)3Cl2 (0.5 mol%) under visible light irradiation in acetonitrile at room temperature. The developed methodology was also applicable for the synthesis of silanols using water as a coupling partner.
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Affiliation(s)
- Haiping Lv
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China.
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17
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Bulbul MZH, Chowdhury TS, Misbah MMH, Ferdous J, Dey S, Hasan I, Fujii Y, Ozeki Y, Kawsar SMA. Synthesis of new series of pyrimidine nucleoside derivatives bearing the acyl moieties as potential antimicrobial agents. PHARMACIA 2021. [DOI: 10.3897/pharmacia.68.e56543] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Nucleoside derivatives are important therapeutic drugs and are the focal point in the ongoing search for novel, more potent drug targets. In this study, a new series of pyrimidine nucleoside i.e., uridine (1) derivatives were synthesized via direct method and evaluated for their antimicrobial potential activity. The title compound uridine (1) was treated with triphenylmethyl chloride in pyridine to give the 5´-O-(triphenylmethyl)uridine derivative (2), which was subsequently derivatized to create a series of 2´,3´-di-O-acyl analogs containing a wide variety of functionalities in a single molecular framework. In vitro antimicrobial functionality tests were determined against both human and plant pathogens by disc diffusion and food poisoned techniques. The chemical structures of the synthesized compounds were confirmed on the basis of their spectral, analytical, physicochemical data. The antimicrobial results indicated that the synthesized derivatives exhibited moderate to good antibacterial and antifungal activity; in particular, they were found to be more effective against fungal phytopathogens than against human bacterial strains. Compounds 7, 9, and 14 were of particular interest as they exhibited noteworthy antifungal and antibacterial properties. In vitro MTT assays revealed that compound 9 was effective against Ehrlich’s ascites carcinoma (EAC) cells, resulting in 7.12% and 1.34% cell growth inhibition at concentrations of 200 and 6.25 µg/ml, respectively. The IC50 value for compound 9 was rather high and found to be 1956.25 µg/ml. Structure-activity relationship (SAR) studies were also conducted to predict structural and pharmacokinetic properties. The findings of this study indicate that the different uridine derivatives are potentially useful antimicrobial agents for the advancement of future pharmaceutical research.
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18
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Ngo-Mback M, Famewo E, MubarakAli D, Eke P, Thajuddin N, Afolayan A, Jazet Dongmo P, Fekam Boyom F. An investigation of chemical composition and antimicrobial activity of essential oils extracted from Aeollanthus and Plectranthus species. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Saire-Saire S, Barbosa ECM, Garcia D, Andrade LH, Garcia-Segura S, Camargo PHC, Alarcon H. Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation. RSC Adv 2019; 9:22116-22123. [PMID: 35518899 PMCID: PMC9066651 DOI: 10.1039/c9ra04222a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 06/30/2019] [Indexed: 12/26/2022] Open
Abstract
We present a cleaner chemical synthesis process of a magnetic recoverable Au/CoFe2O4 hybrid nanocomposite catalyst that has remarkable activity in catalytic reduction and oxidation, improved by surface plasmon resonance.
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Affiliation(s)
- Samuel Saire-Saire
- Center for Development of Advanced Materials and Nanotechnology
- Universidad Nacional de Ingeniería
- Lima
- Peru
| | - Eduardo C. M. Barbosa
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Daniel Garcia
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Leandro H. Andrade
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment
- School of Sustainable Engineering and the Built Environment
- Arizona State University
- Tempe
- USA
| | - Pedro H. C. Camargo
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo-SP
- Brazil
| | - Hugo Alarcon
- Center for Development of Advanced Materials and Nanotechnology
- Universidad Nacional de Ingeniería
- Lima
- Peru
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20
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Diemoz KM, Franz AK. NMR Quantification of Hydrogen-Bond-Activating Effects for Organocatalysts including Boronic Acids. J Org Chem 2018; 84:1126-1138. [PMID: 30516381 DOI: 10.1021/acs.joc.8b02389] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The hydrogen-bonding activation for 66 organocatalysts has been quantified using a 31P NMR binding experiment with triethylphosphine oxide (TEPO). Diverse structural classes, including phenols, diols, silanols, carboxylic acids, boronic acids, and phosphoric acids, were examined with a variety of steric and electronic modifications to understand how the structure and secondary effects contribute to hydrogen-bonding ability and catalysis. Hammett plots demonstrate high correlation for the Δδ 31P NMR shift to Hammett parameters, establishing the ability of TEPO binding to predict electronic trends. Upon correlation to catalytic activity in a Friedel-Crafts addition reaction, data demonstrate that 31P NMR shifts correlate to catalytic activity better than p Ka values. Boronic acids were investigated, and 31P NMR binding experiments predicted strong hydrogen-bonding ability, for which catalytic activity was confirmed, resulting in the greatest rate enhancement observed in the Friedel-Crafts addition of all organocatalysts studied. A detailed investigation supports that boronic acid activation proceeds through hydrogen-bonding interactions and not coordination with the Lewis acidic boron center. Using 31P NMR spectroscopy offers a simple and rapid tool to quantify and predict hydrogen-bonding abilities for the design and applications of new organocatalysts and supramolecular synthons.
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Affiliation(s)
- Kayla M Diemoz
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
| | - Annaliese K Franz
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
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21
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Massawe VC, Hanif A, Farzand A, Mburu DK, Ochola SO, Wu L, Tahir HAS, Gu Q, Wu H, Gao X. Volatile Compounds of Endophytic Bacillus spp. have Biocontrol Activity Against Sclerotinia sclerotiorum. PHYTOPATHOLOGY 2018; 108:1373-1385. [PMID: 29927356 DOI: 10.1094/phyto-04-18-0118-r] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
To develop an effective biological agent to control Sclerotinia sclerotiorum, three endophytic Bacillus spp. strains with high antagonistic activity were isolated from maize seed and characterized. In vitro assays revealed that the Bacillus endophytes could produce volatile organic compounds (VOC) that reduced sclerotial production and inhibited mycelial growth of S. sclerotiorum. Gas chromatography-mass spectrometry revealed that the selected strains produced 16 detectable VOC. Eight of the produced VOC exhibited negative effects on S. sclerotiorum, while a further four induced accumulation of reactive oxygen species in mycelial cells. A mixture of VOC produced by Bacillus velezensis VM11 caused morphological changes in the ultrastructure and organelle membranes of S. sclerotiorum mycelial cells. The bromophenol blue assay revealed a yellow color of untreated fungal mycelium, which grew faster and deeper from 24 to 72 h postinoculation, as an indication of reduced pH. The potassium permanganate (KMnO4) titration assay showed that the rate of oxalic acid accumulation was higher in minimal salt liquid medium cultures inoculated with untreated fungal plugs compared with the Bacillus VOC-treated ones. Interestingly, biological control assays using host-plant leaves challenged with treated fungal mycelial plugs produced reduced lesions compared with the control. These findings provide new viable possibilities of controlling diseases caused by S. sclerotiorum using VOC produced by Bacillus endophytes.
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Affiliation(s)
- Venance Colman Massawe
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Alvina Hanif
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Ayaz Farzand
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - David Kibe Mburu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Sylvans Ochieng Ochola
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Liming Wu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Hafiz Abdul Samad Tahir
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Qin Gu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Huijun Wu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
| | - Xuewen Gao
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, PR China
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22
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Ramesh R, Reddy DS. Quest for Novel Chemical Entities through Incorporation of Silicon in Drug Scaffolds. J Med Chem 2017; 61:3779-3798. [DOI: 10.1021/acs.jmedchem.7b00718] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Remya Ramesh
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110 025, India
| | - D. Srinivasa Reddy
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110 025, India
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23
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Manoharan RK, Lee JH, Lee J. Antibiofilm and Antihyphal Activities of Cedar Leaf Essential Oil, Camphor, and Fenchone Derivatives against Candida albicans. Front Microbiol 2017; 8:1476. [PMID: 28824600 PMCID: PMC5541024 DOI: 10.3389/fmicb.2017.01476] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 07/21/2017] [Indexed: 01/09/2023] Open
Abstract
Candida albicans can form biofilms composed of yeast, hyphal, and pseudohyphal elements, and C. albicans cells in the hyphal stage could be a virulence factor. The present study describes the chemical composition, antibiofilm, and antihyphal activities of cedar leaf essential oil (CLEO), which was found to possess remarkable antibiofilm activity against C. albicans but not to affect its planktonic cell growth. Nineteen components were identified in CLEO by gas chromatography/mass spectrometry, and phenolics were the main constituents. Of these, camphor, fenchone, fenchyl alcohol, α-thujone, and borneol significantly reduced C. albicans biofilm formation. Notably, treatments with CLEO, camphor, or fenchyl alcohol at 0.01% clearly inhibited hyphal formation, and this inhibition appeared to be largely responsible for their antibiofilm effects. Transcriptomic analyses indicated that camphor and fenchyl alcohol downregulated some hypha-specific and biofilm related genes (ECE1, ECE2, RBT1, and EED1). Furthermore, camphor and fenchyl alcohol reduced C. albicans virulence in a Caenorhabditis elegans nematode model. These results demonstrate CLEO, camphor, and fenchyl alcohol might be useful for controlling C. albicans infections.
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Affiliation(s)
| | - Jin-Hyung Lee
- School of Chemical Engineering, Yeungnam UniversityGyeongsan, South Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam UniversityGyeongsan, South Korea
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24
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Fan X, Wagner K, Sokorai KJB, Ngo H. Inactivation of Gram-Positive Bacteria by Novel Phenolic Branched-Chain Fatty Acids. J Food Prot 2017; 80:6-14. [PMID: 28221889 DOI: 10.4315/0362-028x.jfp-16-080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Novel phenolic branched-chain fatty acids (PBC-FAs) were evaluated for their antimicrobial properties against both gram-positive ( Listeria innocua , Bacillus subtilis , Enterococcus faecium ) and gram-negative ( Escherichia coli , Salmonella Typhimurium, and Pseudomonas tolaasii ) bacteria. In addition, PBC-FA derivatives, such as PBC-FA methyl ester mixture, methyl-branched fatty acid mixtures, and trimethylsilyl-PBC-FA methyl esters, were synthesized to study the structure activity relationship. Results showed that PBC-FAs were a potent antimicrobial against gram-positive bacteria with MICs of 1.8 to 3.6 μg/ml. The compounds were less effective against gram-negative bacteria. Derivatives of PBC-FAs and an equimolar mixture of oleic acid and phenol all had MICs above 233 μg/ml against both gram-positive and gram-negative bacteria. Comparison of antimicrobial activities of the PBC-FAs with those of the derivatives suggests that the carboxylic group in the fatty acid moiety and the hydroxyl group on the phenol moiety were responsible for the antimicrobial efficacy. Growth curves of L. innocua revealed that PBC-FAs prevented bacterial growth, while MBC-FAs only delayed the onset of rapid growth of L. innocua . Our results demonstrated that the novel PBC-FAs have potential for use as antimicrobials against gram-positive bacteria.
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Affiliation(s)
- Xuetong Fan
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Karen Wagner
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Kimberly J B Sokorai
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Helen Ngo
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
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25
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Bruña S, Garrido-Castro AF, Perles J, Montero-Campillo MM, Mó O, Kaifer AE, Cuadrado I. Multi-Ferrocene-Containing Silanols as Redox-Active Anion Receptors. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00559] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | | | | | | | | | - Angel E. Kaifer
- Center
for Supramolecular Science and Department of Chemistry, University of Miami, Coral Gables, Florida 33124-0431, United States
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26
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Monggoot S, Burawat J, Pripdeevech P. Antibacterial Activities of Endophytic Fungi Isolated from Mentha cordifolia Leaves and Their Volatile Constituents. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A total of 17 endophytic fungal isolates were obtained from the leaves of Mentha cordifolia Opiz (Lamiaceae). Seven isolates were identified to the level of genus by using taxonomically relevant morphological traits. Colletotrichum and Phomopsis species were dominant among these strains. All strains were separated from M. cordifolia leaf for the first time. The ethyl acetate extracts of all endophytic fungi were tested for antibacterial activity against Salmonella typhimurium TISTR1166 and Pseudomonas aeruginosa TISTR781. Most endophytes exhibited antibacterial activity. Ustilago sp. MFLUCC15-1024 presented the highest inhibition zone diameter with a MIC of 31.25 μg/mL against the tested pathogens. The chemical composition of the ethyl acetate extract of this strain was investigated using gas chromatography-mass spectrometry. Twenty-one components were identified. 2-Phenylethanol (38.7%), E-ligustilide (12.4%), α-eudesmol (10.2%), β-vetivone (4.6%), β-ylangene (3.7%) and verbanol (3.4%) were the major components of the extract. The strong antibacterial activity of Ustilago sp. MFLUCC15-1024 ethyl acetate extract may be attributed to the presence of a high concentration of bioactive compounds including phenyl ethyl alcohol, E-ligustilide and α-eudesmol. The results indicate that there is high diversity of endophytic fungi in M. cordifolia leaf, and that Ustilago sp. MFLUCC15-1024 strain could be an excellent resource of natural antibacterial compounds.
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Affiliation(s)
- Sakon Monggoot
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Jariya Burawat
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
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27
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McDaniel C, Su S, Panmanee W, Lau GW, Browne T, Cox K, Paul AT, Ko SHB, Mortensen JE, Lam JS, Muruve DA, Hassett DJ. A Putative ABC Transporter Permease Is Necessary for Resistance to Acidified Nitrite and EDTA in Pseudomonas aeruginosa under Aerobic and Anaerobic Planktonic and Biofilm Conditions. Front Microbiol 2016; 7:291. [PMID: 27064218 PMCID: PMC4817314 DOI: 10.3389/fmicb.2016.00291] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/23/2016] [Indexed: 11/18/2022] Open
Abstract
Pseudomonas aeruginosa (PA) is an important airway pathogen of cystic fibrosis and chronic obstructive disease patients. Multiply drug resistant PA is becoming increasing prevalent and new strategies are needed to combat such insidious organisms. We have previously shown that a mucoid, mucA22 mutant PA is exquisitely sensitive to acidified nitrite (A-NO2−, pH 6.5) at concentrations that are well tolerated in humans. Here, we used a transposon mutagenesis approach to identify PA mutants that are hypersensitive to A-NO2−. Among greater than 10,000 mutants screened, we focused on PA4455, in which the transposon was found to disrupt the production of a putative cytoplasmic membrane-spanning ABC transporter permease. The PA4455 mutant was not only highly sensitive to A-NO2−, but also the membrane perturbing agent, EDTA and the antibiotics doxycycline, tigecycline, colistin, and chloramphenicol, respectively. Treatment of bacteria with A-NO2− plus EDTA, however, had the most dramatic and synergistic effect, with virtually all bacteria killed by 10 mM A-NO2−, and EDTA (1 mM, aerobic, anaerobic). Most importantly, the PA4455 mutant was also sensitive to A-NO2− in biofilms. A-NO2− sensitivity and an anaerobic growth defect was also noted in two mutants (rmlC and wbpM) that are defective in B-band LPS synthesis, potentially indicating a membrane defect in the PA4455 mutant. Finally, this study describes a gene, PA4455, that when mutated, allows for dramatic sensitivity to the potential therapeutic agent, A-NO2− as well as EDTA. Furthermore, the synergy between the two compounds could offer future benefits against antibiotic resistant PA strains.
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Affiliation(s)
- Cameron McDaniel
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Shengchang Su
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Warunya Panmanee
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Gee W Lau
- College of Veterinary Medicine, University of Illinois at Urbana-Champaign Urbana, IL, USA
| | - Tristan Browne
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Kevin Cox
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Andrew T Paul
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Seung-Hyun B Ko
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Joel E Mortensen
- Diagnostic and Infectious Diseases Testing Laboratory, Cincinnati Children's Hospital Medical Center Cincinnati, OH, USA
| | - Joseph S Lam
- Department of Molecular and Cellular Biology, University of Guelph Guelph, ON, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary Calgary, AB, Canada
| | - Daniel J Hassett
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of MedicineCincinnati, OH, USA; Department of Research Services, Cincinnati Veteran's Association Medical CenterCincinnati, OH, USA
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28
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Inactivation of Escherichia coli O157:H7 in vitro and on the surface of spinach leaves by biobased antimicrobial surfactants. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.07.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Wang Y, El-Deen AG, Li P, Oh BHL, Guo Z, Khin MM, Vikhe YS, Wang J, Hu RG, Boom RM, Kline KA, Becker DL, Duan H, Chan-Park MB. High-Performance Capacitive Deionization Disinfection of Water with Graphene Oxide-graft-Quaternized Chitosan Nanohybrid Electrode Coating. ACS NANO 2015; 9:10142-10157. [PMID: 26389519 DOI: 10.1021/acsnano.5b03763] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Water disinfection materials should ideally be broad-spectrum-active, nonleachable, and noncontaminating to the liquid needing sterilization. Herein, we demonstrate a high-performance capacitive deionization disinfection (CDID) electrode made by coating an activated carbon (AC) electrode with cationic nanohybrids of graphene oxide-graft-quaternized chitosan (GO-QC). Our GO-QC/AC CDID electrode can achieve at least 99.9999% killing (i.e., 6 log reduction) of Escherichia coli in water flowing continuously through the CDID cell. Without the GO-QC coating, the AC electrode alone cannot kill the bacteria and adsorbs a much smaller fraction (<82.8 ± 1.8%) of E. coli from the same biocontaminated water. Our CDID process consists of alternating cycles of water disinfection followed by electrode regeneration, each a few minutes duration, so that this water disinfection process can be continuous and it only needs a small electrode voltage (2 V). With a typical brackish water biocontamination (with 10(4) CFU mL(-1) bacteria), the GO-QC/AC electrodes can kill 99.99% of the E. coli in water for 5 h. The disinfecting GO-QC is securely attached on the AC electrode surface, so that it is noncontaminating to water, unlike many other chemicals used today. The GO-QC nanohybrids have excellent intrinsic antimicrobial properties in suspension form. Further, the GO component contributes toward the needed surface conductivity of the CDID electrode. This CDID process offers an economical method toward ultrafast, contaminant-free, and continuous killing of bacteria in biocontaminated water. The proposed strategy introduces a green in situ disinfectant approach for water purification.
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Affiliation(s)
- Yilei Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
| | - Ahmed G El-Deen
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
| | - Peng Li
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
- Centre for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an 710049, China
| | - Bernice H L Oh
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
| | - Zanru Guo
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
| | - Mya Mya Khin
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
| | - Yogesh S Vikhe
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
| | - Jing Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
| | - Rebecca G Hu
- Lee Kong Chian School of Medicine, Nanyang Technological University , Singapore 308232
| | - Remko M Boom
- Food Process Engineering Laboratory, Agrotechnology and Food Sciences Group, Wageningen University , Wageningen 6708 WG, The Netherlands
| | - Kimberly A Kline
- Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University , Singapore 637551
- School of Biological Sciences, Nanyang Technological University , Singapore 637551
| | - David L Becker
- Lee Kong Chian School of Medicine, Nanyang Technological University , Singapore 308232
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , Singapore 637459
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30
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Gong AD, Li HP, Shen L, Zhang JB, Wu AB, He WJ, Yuan QS, He JD, Liao YC. The Shewanella algae strain YM8 produces volatiles with strong inhibition activity against Aspergillus pathogens and aflatoxins. Front Microbiol 2015; 6:1091. [PMID: 26500631 PMCID: PMC4594021 DOI: 10.3389/fmicb.2015.01091] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 09/22/2015] [Indexed: 12/22/2022] Open
Abstract
Aflatoxigenic Aspergillus fungi and associated aflatoxins are ubiquitous in the production and storage of food/feed commodities. Controlling these microbes is a challenge. In this study, the Shewanella algae strain YM8 was found to produce volatiles that have strong antifungal activity against Aspergillus pathogens. Gas chromatography-mass spectrometry profiling revealed 15 volatile organic compounds (VOCs) emitted from YM8, of which dimethyl trisulfide was the most abundant. We obtained authentic reference standards for six of the VOCs; these all significantly reduced mycelial growth and conidial germination in Aspergillus; dimethyl trisulfide and 2,4-bis(1,1-dimethylethyl)-phenol showed the strongest inhibitory activity. YM8 completely inhibited Aspergillus growth and aflatoxin biosynthesis in maize and peanut samples stored at different water activity levels, and scanning electron microscopy revealed severely damaged conidia and a complete lack of mycelium development and conidiogenesis. YM8 also completely inhibited the growth of eight other agronomically important species of phytopathogenic fungi: A. parasiticus, A. niger, Alternaria alternate, Botrytis cinerea, Fusarium graminearum, Fusarium oxysporum, Monilinia fructicola, and Sclerotinia sclerotiorum. This study demonstrates the susceptibility of Aspergillus and other fungi to VOCs from marine bacteria and indicates a new strategy for effectively controlling these pathogens and the associated mycotoxin production during storage and possibly in the field.
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Affiliation(s)
- An-Dong Gong
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - He-Ping Li
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Lu Shen
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Jing-Bo Zhang
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Ai-Bo Wu
- Key Laboratory of Food Safety Research Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
| | - Wei-Jie He
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Qing-Song Yuan
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Jing-De He
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Yu-Cai Liao
- Molecular Biotechnology Laboratory of Triticeae Crops, Huazhong Agricultural University Wuhan, China ; College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China ; National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University Wuhan, China
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31
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Ornek N, Apan T, Oğurel R, Ornek K. Comparison of the antimicrobial effect of heavy silicone oil and conventional silicone oil against endophthalmitis-causing agents. Indian J Ophthalmol 2015; 62:388-91. [PMID: 24817741 PMCID: PMC4064209 DOI: 10.4103/0301-4738.126994] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Purpose: To conduct an in vitro experimental study comparing the effectiveness of conventional silicone oil and heavy silicone oil against endophthalmitis-causing agents. Materials and Methods: The antimicrobial activity of conventional silicone oil (RS OIL 5000) and heavy silicone oil (heavySil 1500) was tested. The antimicrobial effects of both silicone oils were determined by the growing capability of the microorganism. Results: The number of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans decreased to zero levels at the second day of inoculation in heavy silicone oil. In conventional silicone oil, the microorganisms survived longer than in heavy silicone oil. Conclusion: Heavy silicone oil seems to be more effective than conventional silicone oil against endophthalmitis-causing agents.
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Affiliation(s)
| | | | | | - Kemal Ornek
- Department of Ophthalmology , School of Medicine, Kirikkale University, Turkey
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32
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Affiliation(s)
- Christoph Rücker
- Institute for Sustainable and Environmental Chemistry, Leuphana University Lüneburg , Scharnhorststrasse 1, D-21335 Lüneburg, Germany
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33
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Massa MA, Covarrubias C, Bittner M, Fuentevilla IA, Capetillo P, Von Marttens A, Carvajal JC. Synthesis of new antibacterial composite coating for titanium based on highly ordered nanoporous silica and silver nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:146-53. [PMID: 25491813 DOI: 10.1016/j.msec.2014.08.057] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/07/2014] [Accepted: 08/29/2014] [Indexed: 11/28/2022]
Abstract
Infection is the most common factor that leads to dental titanium implant failure. Antibacterial implant surfaces based on nano-scale modifications of the titanium appear as an attractive strategy for control of peri-implantitis. In the present work, the preparation and antibacterial properties of a novel composite coating for titanium based on nanoporous silica and silver nanoparticles are presented. Starch-capped silver nanoparticles (AgNPs) were synthesized and then incorporated into sol-gel based solution system. The AgNP-doped nanoporous silica coatings were prepared on titanium surface using a combined sol-gel and evaporation-induced self-assembly (EISA) method. The coating nanostructure was characterized by XRD, SEM-EDX, and HR-TEM. Antibacterial activity was evaluated against Aggregatibacter actinomycetemcomitans, a representative pathogen of dental peri-implantitis. Colony-forming units (CFUs) were counted within the biofilm and at the planktonic state. Biofilm development was quantified using crystal violet staining and viability of adherent bacteria was confirmed with the Live/Dead fluorescence assay. Silica-based composite coating containing AgNPs (AgNP/NSC) was prepared on titanium surface by direct incorporation of AgNP suspension into the sol-gel system. The self-assembly technique enabled the spontaneous formation of a highly ordered nanoporosity in the coating structure, which is a desired property for osseointegration aspects of titanium implant surface. AgNP/NSC coating produces a strong antibacterial effect on titanium surface by not only killing the adherent bacteria but also reducing the extent of biofilm formation. Biofilm survival is reduced by more than 70% on the AgNP/NSC-modified titanium surface, compared to the control. This antibacterial effect was verified for up to 7 days of incubation. The long-term antibacterial activity exhibited by the nanostructured AgNP/NSC-titanium surface against A. actinomycetemcomitans suggests that this type of nano-scale surface modification is a promissory strategy to control infections associated with dental implant rehabilitation.
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Affiliation(s)
- Miguel A Massa
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Independencia, Santiago, Chile
| | - Cristian Covarrubias
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Independencia, Santiago, Chile.
| | - Mauricio Bittner
- Laboratory of Oral Microbiology and Biotechnology, Faculty of Biological Sciences, Andrés Bello University, Santiago, Chile; Laboratory of Oral Microbiology and Biotechnology, Faculty of Dentistry, Andrés Bello University, Santiago, Chile
| | - Ignacio Andrés Fuentevilla
- Laboratory of Oral Microbiology and Biotechnology, Faculty of Biological Sciences, Andrés Bello University, Santiago, Chile
| | - Pavel Capetillo
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Independencia, Santiago, Chile
| | - Alfredo Von Marttens
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Independencia, Santiago, Chile
| | - Juan Carlos Carvajal
- Laboratory of Nanobiomaterials, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Independencia, Santiago, Chile
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Kumar M, Narasimhan B, Kumar P, Ramasamy K, Mani V, Mishra RK, Majeed ABA. 4-(1-Aryl-5-chloro-2-oxo-1,2-dihydro-indol-3-ylideneamino)-N-substituted benzene sulfonamides: Synthesis, antimicrobial, anticancer evaluation and QSAR studies. ARAB J CHEM 2014. [DOI: 10.1016/j.arabjc.2013.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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35
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Saravana Kumar P, Duraipandiyan V, Ignacimuthu S. Isolation, screening and partial purification of antimicrobial antibiotics from soil Streptomyces sp. SCA 7. Kaohsiung J Med Sci 2014; 30:435-46. [PMID: 25224766 DOI: 10.1016/j.kjms.2014.05.006] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 03/24/2014] [Accepted: 02/06/2014] [Indexed: 11/26/2022] Open
Abstract
Thirty-seven actinomycetes strains were isolated from soil samples collected from an agriculture field in Vengodu, Thiruvannamalai District, Tamil Nadu, India (latitude: 12° 54' 0033″, North; longitude: 79° 78' 5216″, East; elevation: 228.6/70.0 ft/m). The isolates were assessed for antagonistic activity against five Gram-positive bacteria, seven Gram-negative bacteria, and two pathogenic fungi. During the initial screening, 43% of the strains showed weak activity, 16% showed moderate activity, 5% showed good activity, and 35% showed no antagonistic activity. Among the strains tested, SCA 7 showed strong antimicrobial activity. Maximum biological activity was obtained on modified nutrient glucose agar (MNGA) medium. The mycelia of SCA 7 were extracted with methanol and tested against microbial pathogens using the disc diffusion method. The crude extract was purified partially using column chromatography and assessed for antimicrobial activity. Fraction 10 showed good activity against Staphylococcus epidermidis (31.25 μg/mL) and Malassezia pachydermatis (500 μg/mL) and the active principle (fraction 10) was identified as 2,4-bis (1,1-dimethylethyl) phenol. Based on morphological, physiological, biochemical, cultural, and molecular characteristics (16S rDNA sequencing), this strain was identified as Streptomyces sp. SCA 7. It could be used in the development of new substances for pharmaceutical or agricultural purposes.
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Affiliation(s)
- P Saravana Kumar
- Division of Microbiology, Entomology Research Institute, Loyola College, Chennai, India
| | - V Duraipandiyan
- Department of Botany and Microbiology, College of Science, King Saud University, P.O.Box.2455, Riyadh 11451, Saudi Arabia
| | - S Ignacimuthu
- Division of Microbiology, Entomology Research Institute, Loyola College, Chennai, India.
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Hou Y, Ding X, Hou W, Zhong J, Zhu H, Ma B, Xu T, Li J. Anti-microorganism, anti-tumor, and immune activities of a novel polysaccharide isolated from Tricholoma matsutake. Pharmacogn Mag 2013; 9:244-9. [PMID: 23930009 PMCID: PMC3732428 DOI: 10.4103/0973-1296.113278] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 07/07/2012] [Accepted: 06/11/2013] [Indexed: 11/13/2022] Open
Abstract
Background: Many more fungal polysaccharides have been reported to exhibit a variety of biological activities, including anti-tumor, immunostimulation, anti-oxidation, and so on. The non-starch polysaccharides have emerged as an important class of bioactive natural products. Objective: To investigate the anti-microorganism, anti-tumor, and immune activities of a novel polysaccharide (TMP-A) isolated from Tricholoma matsutake. Materials and Methods: The anti-microorganism activity of purified polysaccharides (TMP-A) was evaluated by the inhibition zone diameter, the anti-tumor activity was evaluated by the S180 tumor cells that were implanted subcutaneously into the Kunming strain male mice in vivo, and the immune activity was evaluated by lymphocyte proliferation and macrophage stimulation, respectively. Results: In this study, the most susceptible bacteria of TMP-A at a concentration of 20 mg/ml was Micrococcus lysodeikticus (inhibition zone diameter 24.38 ± 1.19 mm) and the TMP-A did not show any antifungal activity for the tested stains of the fungi. In addition, the inhibitory rate in mice treated with 80 mg/kg TMP-A could reach 68.422%, being the highest in the three doses, which might be comparable to mannatide. The anti-tumor activity of the TMP-A was usually believed to be a consequence of the stimulation of the cell-mediated immune response, because it could significantly promote the lymphocyte and macrophage cells in the dose range of 50–200 μg/mL and in the dose range of 100 – 400 μg/mL in vitro, respectively. Discussion and Conclusion: The results obtained in the present study indicate that the purification polysaccharide of Tricholoma matsutake is a potential source of natural broad-spectrum, anti-microorganism, anti-tumor, and immunomodulation.
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Affiliation(s)
- Yiling Hou
- Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), College of Life Sciences, China West Normal University, 1# Shida Road, Nanchong, Sichuan Province, China
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37
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Kumar P, Narasimhan B, Ramasamy K, Mani V, Mishra RK, Majeed ABA, De Clercq E. N'-[4-[(Substituted imino)methyl]benzylidene]-substituted benzohydrazides: synthesis, antimicrobial, antiviral, and anticancer evaluation, and QSAR studies. MONATSHEFTE FUR CHEMIE 2012; 144:825-849. [PMID: 32214480 PMCID: PMC7087754 DOI: 10.1007/s00706-012-0877-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 10/12/2012] [Indexed: 11/20/2022]
Abstract
ABSTRACT A variety of N'-[4-[(substituted imino)methyl]benzylidene]-substituted benzohydrazides have been synthesized and evaluated for antimicrobial and anticancer potential. Results from testing of antimicrobial activity indicated the most potent antimicrobial agents had pMIC am = 1.51. The synthesized compounds were bacteriostatic and fungistatic in action. Results from evaluation of antiviral activity indicated that none of the synthesized hydrazide derivatives inhibited viral replication at sub-toxic concentrations. Results from anti-HIV screening against HIV-2 strain ROD indicated that one compound was more potent (IC 50 ≥ 1 μg/cm3) than the standard drug nevirapine (IC 50 ≥ 4 μg/cm3) and another was equipotent (IC 50 ≥ 4 μg/cm3). The most effective anticancer agent against both HCT116 and MCF7 cancer cell lines had IC 50 = 19 and 18 μg/cm3, respectively. QSAR analysis indicated the importance of Wiener index (W) and energy of the lowest unoccupied molecular orbital (LUMO) in describing the antimicrobial activity of the synthesized compounds. GRAPHICAL ABSTRACT
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Affiliation(s)
- Pradeep Kumar
- Faculty of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, 124001 India
| | | | - Kalavathy Ramasamy
- Collaborative Drug Discovery Research Group, Faculty of Pharmacy, Campus Puncak Alam, Universiti Teknologi MARA (UiTM), Bandar Puncak Alam, 42300 Shan Alam, Selangor Malaysia
| | - Vasudevan Mani
- Brain Research Laboratory, Faculty of Pharmacy, Campus Puncak Alam, Universiti Teknologi MARA (UiTM), Bandar Puncak Alam, 42300 Shan Alam, Selangor Malaysia
| | - Rakesh Kumar Mishra
- Brain Research Laboratory, Faculty of Pharmacy, Campus Puncak Alam, Universiti Teknologi MARA (UiTM), Bandar Puncak Alam, 42300 Shan Alam, Selangor Malaysia
| | - Abu Bakar Abdul Majeed
- Brain Research Laboratory, Faculty of Pharmacy, Campus Puncak Alam, Universiti Teknologi MARA (UiTM), Bandar Puncak Alam, 42300 Shan Alam, Selangor Malaysia
| | - Erik De Clercq
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Minderbroedersstraat 10, 3000 Louvain, Belgium
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Affiliation(s)
- Annaliese K. Franz
- Department of Chemistry, University of California—Davis, One Shields Avenue, Davis,
California, United States
| | - Sean O. Wilson
- Department of Chemistry, University of California—Davis, One Shields Avenue, Davis,
California, United States
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Wilson SO, Tran NT, Franz AK. NMR and X-ray Studies of Hydrogen Bonding for Amide-Containing Silanediols. Organometallics 2012. [DOI: 10.1021/om300736n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sean O. Wilson
- Department of Chemistry, University of California, One Shields
Avenue, Davis, California 95616, United States
| | - Ngon T. Tran
- Department of Chemistry, University of California, One Shields
Avenue, Davis, California 95616, United States
| | - Annaliese K. Franz
- Department of Chemistry, University of California, One Shields
Avenue, Davis, California 95616, United States
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Kim N, Kim JK, Hwang D, Lim YH. The possible mechanism of rhapontigenin influencing antifungal activity on Candida albicans. Med Mycol 2012; 51:45-52. [PMID: 22662760 DOI: 10.3109/13693786.2012.689021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Rhapontigenin, an aglycone of rhapontin, was produced by biotransformation and we investigated its antifungal activity against Candida albicans, one of the most important opportunistic fungal pathogens. Rhapontigenin is found to have, in vitro, inhibitory activity with a minimal inhibitory concentration (MIC) value against all test isolates of 128-256 μg/ml. We detected increased reactive oxygen species (ROS) levels in yeast cultures treated with rhapontigenin at the MIC. Rhapontigenin inhibited DNA, RNA, and protein synthesis, especially RNA synthesis, and induced morphological changes and apoptosis of C. albicans. The apoptotic effect of rhapontigenin on C. albicans at subinhibitory concentrations was higher in the stationary growth phase than in the exponential phase, while the opposite results were noted with amphotericin B. The mechanism of antifungal activity of rhapontigenin may be associated with the generation of ROS that might induce apoptosis and it may also involve the inhibition of ergosterol biosynthesis.
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Affiliation(s)
- Narae Kim
- Department of Biomedical Science, College of Health Science, Korea University, Seoul, Korea
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Seow LJ, Beh HK, Ibrahim P, Sadikun A, Asmawi MZ. Antimicrobial activity of Gynura segetum's leaf extracts and its active fractions. ACTA ACUST UNITED AC 2012. [DOI: 10.5667/tang.2012.0010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sundaram S, Annamalai SK. Selective immobilization of hydroquinone on carbon nanotube modified electrode via phenol electro-oxidation method and its hydrazine electro-catalysis and Escherichia coli antibacterial activity. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.12.044] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Joray MB, González ML, Palacios SM, Carpinella MC. Antibacterial activity of the plant-derived compounds 23-methyl-6-O-desmethylauricepyrone and (Z,Z)-5-(trideca-4,7-dienyl)resorcinol and their synergy with antibiotics against methicillin-susceptible and -resistant Staphylococcus aureus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:11534-11542. [PMID: 21958238 DOI: 10.1021/jf2030665] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present study investigated the antibacterial activity of two plant-derived compounds, 23-methyl-6-O-desmethylauricepyrone (1) and (Z,Z)-5-(trideca-4,7-dienyl)resorcinol (2), and their synergistic effects with erythromycin and gentamicin against methicillin-susceptible (MSSA) and gentamicin- and methicillin-resistant Staphylococcus aureus (MRSA). Studies of the individual antibacterial activity of each plant-derived compound and synergy experiments were carried out, by the microdilution test in agar and by the checkerboard method, respectively. Compound 1 showed minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 2 and 8 μg/mL, respectively, against both strains of S. aureus, while compound 2 exhibited anti-MSSA and anti-MRSA activity with MICs and MBCs of 4 and 8 and 2 and 8 μg/mL, respectively. Time-kill curves showed that, while compound 1 produced complete killing of both strains at 24 h from the beginning of the experiment, 2 produced the same effect in the first hour. Combinations of 1 with erythromycin or gentamicin showed a notable synergism against MSSA, which enabled the antibiotic concentration to decrease by up to 300 or 260 times, respectively. When the aminoglycoside was placed together with compound 2, only an additive effect was observed. The assayed compounds did not produce erythrocyte hemolysis or genotoxicity and they did not affect macrophage viability at the effective or higher concentrations. These results suggest that both compounds could be considered as promising antibacterial agents while compound 1 could be used in combinatory therapies with erythromycin and gentamicin.
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Affiliation(s)
- Mariana B Joray
- Fine Chemicals and Natural Products Laboratory, School of Chemistry, Catholic University of Córdoba, Camino a Alta Gracia Km 10 (5000), Córdoba, Argentina
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Narang R, Narasimhan B, Sharma S. (Naphthalen-1-yloxy)-acetic acid benzylidene/(1-phenyl-ethylidene)-hydrazide derivatives: synthesis, antimicrobial evaluation, and QSAR studies. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9776-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Liu M, Tran NT, Franz AK, Lee JK. Gas-Phase Acidity Studies of Dual Hydrogen-Bonding Organic Silanols and Organocatalysts. J Org Chem 2011; 76:7186-94. [DOI: 10.1021/jo201214x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Min Liu
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901, United States
| | - Ngon T. Tran
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Annaliese K. Franz
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Jeehiun K. Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901, United States
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Ponts N, Pinson-Gadais L, Boutigny AL, Barreau C, Richard-Forget F. Cinnamic-derived acids significantly affect Fusarium graminearum growth and in vitro synthesis of type B trichothecenes. PHYTOPATHOLOGY 2011; 101:929-934. [PMID: 21405995 DOI: 10.1094/phyto-09-10-0230] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The impact of five phenolic acids (ferulic, coumaric, caffeic, syringic, and p-hydroxybenzoic acids) on fungal growth and type B trichothecene production by four strains of Fusarium graminearum was investigated. All five phenolic acids inhibited growth but the degree of inhibition varied between strains. Our results suggested that the more lipophilic phenolic acids are, the higher is the effect they have on growth. Toxin accumulation in phenolic acid-supplemented liquid glucose, yeast extract, and peptone cultures was enhanced in the presence of ferulic and coumaric acids but was reduced in the presence of p-hydroxybenzoic acid. This modulation was shown to correlate with a regulation of TRI5 transcription. In this study, addition of phenolic acids with greater antioxidant properties resulted in a higher toxin accumulation, indicating that the modulation of toxin accumulation may be linked to the antioxidant properties of the phenolic acids. These data suggest that, in planta, different compositions in phenolic acids of kernels from various cultivars may reflect different degrees of sensitivity to "mycotoxinogenesis."
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Affiliation(s)
- Nadia Ponts
- Department of Cell Biology and Neuroscience, University of California-Riverside, CA, USA
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Judge V, Narasimhan B, Ahuja M, Sriram D, Yogeeswari P, De Clercq E, Pannecouque C, Balzarini J. Synthesis, antimycobacterial, antiviral, antimicrobial activities, and QSAR studies of isonicotinic acid-1-(substituted phenyl)-ethylidene/cycloheptylidene hydrazides. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9705-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Isonicotinic acid hydrazide derivatives: synthesis, antimicrobial activity, and QSAR studies. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9662-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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The use of the pseudo-polyelectrolyte, poly(4-vinylphenol), in multilayered films as an antimicrobial surface coating. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2010.12.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Kumar D, Narang R, Judge V, Kumar D, Narasimhan B. Antimicrobial evaluation of 4-methylsulfanyl benzylidene/3-hydroxy benzylidene hydrazides and QSAR studies. Med Chem Res 2011. [DOI: 10.1007/s00044-010-9543-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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