Diversity and antimicrobial activities of the fungal endophyte community associated with the traditional Brazilian medicinal plant Solanum cernuum Vell. (Solanaceae)

2012 ◽  
Vol 58 (1) ◽  
pp. 54-66 ◽  
Author(s):  
Mariana L.A. Vieira ◽  
Alice F.S. Hughes ◽  
Viviane B. Gil ◽  
Aline B.M. Vaz ◽  
Tânia M.A. Alves ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
Endophytic Fungi ◽  
Colletotrichum Gloeosporioides ◽  
Inhibitory Concentration ◽  
Antimicrobial Activities ◽  
Fungal Endophyte ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
Promising Source ◽  
Endophyte Community

The diversity and antimicrobial activity of endophytic fungi associated with the Brazilian medicinal plant Solanum cernuum Vell. were studied during summer and winter seasons. A total of 246 fungal isolates were obtained, including 225 filamentous fungi and 21 yeasts. They were identified by morphological, physiological, and molecular methods. Fifty-five different taxa represented by the phyla Ascomycota (33 taxa), Basidiomycota (21 taxa), and Zygomycota (one taxon) were identified. The most abundant taxa were closely related to Arthrobotrys foliicola , Colletotrichum gloeosporioides , Coprinellus radians , Glomerella acutata , Diatrypella frostii , Phoma glomerata , Mucor sp., Phlebia subserialis , Phoma moricola , Phanerochaete sordida , and Colletotrichum sp. A total of 265 fungal extracts were screened and 64 (26.01%) displayed antimicrobial activities. Among these extracts, 18 (28.12%) presented antibacterial and antifungal activities, 42 (65.62%) displayed selective antibacterial activity, and four (6.25%) exhibited only antifungal activity. The best values of minimum inhibitory concentration were obtained from extracts of Cryptococcus rajasthanensis , Glomerella acutata, Leptosphaeria sp., and Phoma glomerata ranging from 7.8 to 15.62 µg/mL. This study is the first survey of the endophytic fungi community associated with S. cernuum, and our results show that they can represent a promising source of bioactive compounds.

scholarly journals Antimicrobial activities of secondary metabolites of endophytic fungi isolated from Catharanthus roseus

2017 ◽  
Vol 7 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Mark O. Akpotu ◽  
Peter M. Eze ◽  
Chika C. Abba ◽  
Blessing O. Umeokoli ◽  
Charles U. Nwachukwu ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Bioactive Compounds ◽  
Endophytic Fungi ◽  
Catharanthus Roseus ◽  
High Performance ◽  
Antimicrobial Activities ◽  
Antibacterial And Antifungal Activities ◽  
Rice Medium ◽  
Antibacterial And Antifungal ◽  
Promising Source

Introduction: Recently, several endophytes have been shown to possess the potentials to synthesize novel bioactive compounds that have found use for drug discovery. We isolated endophytic fungi associated with Catharanthus roseus collected from the river banks of Amassoma in Southern Nigeria, and identified some of their bioactive secondary metabolites. Methods: The fungi were subjected to solid-state fermentation on rice medium and the metabolites were extracted using ethyl acetate. The fungal crude extracts were screened for antimicrobial activity and were also subjected to high-performance liquid chromatography-diode-array detection (HPLC-DAD) analysis for the identification of the bioactive compounds. Results: The fungal extracts showed both antibacterial and antifungal activities with minimum inhibitory concentrations ranging from 0.0625 to 1 mg/mL. The HPLC-DAD analysis of the extracts suggested the presence of citreoisocoumarin, citreoisocoumarinol, questinol, hydroxyemodin, acropyrone, methyl 2-(4-hydroxyphenyl) acetate, nigricinol, and cladosporin. Conclusion: The results of this study suggest that endophytic fungi associated with C. roseus could be a promising source of novel bioactive compounds with pharmaceutical and industrial importance.

scholarly journals Synthesis and Antimicrobial Activity of Novel Benzoxazoles

2012 ◽  
Vol 67 (9-10) ◽  
pp. 466-472 ◽  
Author(s):  
Mustafa Arisoy ◽  
Ozlem Temiz-Arpaci ◽  
Fatma Kaynak-Onurdag ◽  
Selda Ozgen
Keyword(s):  
Antimicrobial Activity ◽  
Inhibitory Concentration ◽  
Antimicrobial Activities ◽  
Microbial Pathogens ◽  
Drug Resistant ◽  
Dilution Technique ◽  
Spectral Techniques ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
New Compounds

A series of 2-(p-substituted-benzyl)-5-[[4-(p-chloro/fluoro-phenyl)piperazin-1-yl]ace tamido] -benzoxazoles were synthesized in need of new compounds for the fight against microbial pathogens. Their structures were elucidated by spectral techniques. These new derivatives, along with previously synthesized 2-(p-substituted-benzyl)-5-substituted-benzoxazoles, were evaluated for their antibacterial and antifungal activities against standard strains and drugresistant isolates in comparison with ampicillin, gentamicin sulfate, ofloxacin, vancomycin, fluconazole, and amphotericin B trihydrate. The minimum inhibitory concentration (MIC) of each compound was determined by a two-fold serial dilution technique. The compounds were found to possess a broad spectrum of antimicrobial activities with MIC values of 32 - 256 μg/ml. Although standard drugs were more active against the pathogenes employed in this study, the activities of the new benzoxazoles and reference drugs against drug-resistant isolates of the microorganisms were largely similar

The diversity and antimicrobial activity of endophytic fungi associated with medicinal plant Baccharis trimera (Asteraceae) from the Brazilian savannah

2014 ◽  
Vol 60 (12) ◽  
pp. 847-856 ◽  
Author(s):  
Mariana L.A. Vieira ◽  
Susana Johann ◽  
Frederic M. Hughes ◽  
Carlos A. Rosa ◽  
Luiz H. Rosa
Keyword(s):  
Antimicrobial Activity ◽  
Medicinal Plant ◽  
Endophytic Fungi ◽  
Folk Medicine ◽  
Abundant Species ◽  
Antimicrobial Activities ◽  
Fungal Endophyte ◽  
Bioactive Metabolites ◽  
Brazilian Savannah ◽  
Baccharis Trimera

The fungal endophyte community associated with Baccharis trimera, a Brazilian medicinal plant, was characterized and screened for its ability to present antimicrobial activity. By using molecular methods, we identified and classified the endophytic fungi obtained into 25 different taxa from the phyla Ascomycota and Basidiomycota. The most abundant species were closely related to Diaporthe phaseolorum, Pestalotiopsis sp. 1, and Preussia pseudominima. The differences observed in endophytic assemblages from different B. trimera specimens might be associated with their crude extract activities. Plants that had higher α-biodiversity were also those that contributed more to the regional (γ) diversity. All fungal isolates were cultured and their crude extracts screened to examine the antimicrobial activities. Twenty-three extracts (12.8%) displayed antimicrobial activities against at least one target microorganism. Among these extracts, those obtained from Epicoccum sp., Pestalotiopsis sp. 1, Cochliobolus lunatus, and Nigrospora sp. presented the best minimum inhibitory concentration values. Our results show that the endophytic fungal community associated with the medicinal plant B. trimera included few dominant bioactive taxa, which may represent sources of compounds with antifungal activity. Additionally, the discovery of these bioactive fungi in association with B. trimera suggests that Brazilian plants used as folk medicine may shelter a rich fungal diversity as well as taxa able to produce bioactive metabolites with antimicrobial activities.

scholarly journals Spirobisnaphthalenes from the Endophytic Fungus Dzf12 of Dioscorea zingiberensis and Their Antimicrobial Activities

2009 ◽  
Vol 4 (11) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Xiaoyue Cai ◽  
Tijiang Shan ◽  
Peiqin Li ◽  
Yongfu Huang ◽  
Lijian Xu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Medicinal Plant ◽  
Endophytic Fungus ◽  
Antimicrobial Activities ◽  
Spectrometric Analysis ◽  
Antifungal Activities ◽  
Dioscorea Zingiberensis ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
Diepoxin Ζ

Five spirobisnaphthalenes, namely palmarumycin CP17 (1), diepoxin κ (2), diepoxin η (3), diepoxin ζ (4), and diepoxin γ (5), were isolated from the endophytic fungus Dzf12 associated with the medicinal plant Dioscorea zingiberensis C. H. Wright. Their structures were identified by physicochemical and spectrometric analysis. Among these spirobisnaphthalenes, 2 was found to have antibacterial activity, and the mixture of 3 and 4 was detected to have both antibacterial and antifungal activities.

Synthesis & Anticancer Evaluation of New Substituted 2-(3,4- Dimethoxyphenyl)benzazoles

2019 ◽  
Vol 15 (3) ◽  
pp. 287-297 ◽  
Author(s):  
Cigdem Karaaslan ◽  
Yalcin Duydu ◽  
Aylin Ustundag ◽  
Can O. Yalcin ◽  
Banu Kaskatepe ◽  
...  
Keyword(s):  
Hela Cells ◽  
Parp Inhibitor ◽  
A549 Cells ◽  
Human Tumor ◽  
Antimicrobial Activities ◽  
Sodium Metabisulfite ◽  
Human Tumor Cell Lines ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
Mitotic Inhibitor

Background: The benzazole nucleus is found in many promising small molecules such as anticancer and antibacterial agents. Bendamustine (Alkylating agent), Nocodazole (Mitotic inhibitor), Veliparib (PARP inhibitor), and Glasdegib (SMO inhibitor) are being clinically used as anticancer therapeutic which bear benzimidazole moiety. Based on the principle of bioisosterism, in the present work, 23 compounds belonging to 2-(3,4-dimethoxyphenyl)benzazoles and imidazopyridine series were synthesized and evaluated for their anticancer and antimicrobial activities. Objective: A series of new 2-(3,4-dimethoxyphenyl)-1H-benz(or pyrido)azoles were synthesized and evaluated for their anticancer and antimicrobial activities. Method: N-(5-chloro-2-hdroxyphenyl)-3,4-dimethoxybenzamide 1, was obtained by the amidation of 2-hydroxy-5-chloroaniline with 3,4-dimethoxybenzoic acid by using 1,1&'-carbonyldiimidazole. Cyclization of 1 to benzoxazole derivative 2, was achieved by p-toluenesulfonic acid. Other 1H-benz(or pyrido)azoles were prepared by the reaction between 2-aminothiophenol, ophenylenediamine, o-pyridinediamine with sodium metabisulfite adduct of 3,4-dimethoxybenzaldehyde. The NMR assignments of the dimethoxy groups were established by the NOESY spectra. Results: Compound 12, bearing two chlorine atoms at the 5(4) and 7(6) positions of the benzene moiety of benzimidazole was found the most potent analogue against A549 cells with the GI50 value of 1.5 μg/mL. Moreover, 24 showed remarkable cell growth inhibition against MCF-7 and HeLa cells with the GI50 values of 7 and 5.5 μg/mL, respectively. The synthesized compounds have no important antibacterial and antifungal activities. Conclusion: It could be concluded that the introduction of di-chloro atoms at the phenyl ring of 2-(3,4-dimethoxyphenyl)-1H-benzimidazoles increases significant cytotoxicity to selected human tumor cell lines in comparison to other all benzazoles synthesized. Unsubstituted 2-(3,4- dimethoxyphenyl)-imidazopyridines also gave good inhibitory profile against A549 and HeLa cells.

scholarly journals Synthesis and antimicrobial activities of some (E)-N'-1-(substituted benzylidene)benzohydrazides

2017 ◽  
Vol 5 (1) ◽  
pp. 17 ◽  
Author(s):  
V. Manikandan ◽  
S. Balaji ◽  
R. Senbagam ◽  
R. Vijayakumar ◽  
M. Rajarajan ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Spectral Data ◽  
Ultra Violet ◽  
Antimicrobial Activities ◽  
Antibacterial And Antifungal Activities ◽  
Ft Ir ◽  
Fourier Transform Ir ◽  
Antibacterial And Antifungal

About ten substituted (E)-N'-1-(substituted benzylidene) benzohydrazides have been synthesized. They are analyzed by their analytical, ultra violet (UV), Fourier transform-IR (FT-IR) and nuclear magnetic resonance (NMR) spectral data and evaluated by antimicrobial activities such antibacterial and antifungal activities.

scholarly journals Development of Antibacterial and Antifungal Triazole Chromium(III) and Cobalt(II) Complexes: Synthesis and Biological Activity Evaluations

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 2013 ◽  
Author(s):  
Ricardo Murcia ◽  
Sandra Leal ◽  
Martha Roa ◽  
Edgar Nagles ◽  
Alvaro Muñoz-Castro ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Biological Activity ◽  
Melting Point ◽  
Inhibitory Concentration ◽  
Vero Cells ◽  
Visible Spectroscopy ◽  
Antifungal Activities ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
New Compounds

In this work, six complexes (2–7) of Cr(III) and Co(II) transition metals with triazole ligands were synthesized and characterized. In addition, a new ligand, 3,5-bis(1,2,4-triazol-1-ylmethyl)toluene (1), was synthesized and full characterized. The complexes were obtained as air-stable solids and characterized by melting point, electrical conductivity, thermogravimetric analysis, and Raman, infrared and ultraviolet/visible spectroscopy. The analyses and spectral data showed that complexes 3–7 had 1:1 (M:L) stoichiometries and octahedral geometries, while 2 had a 1:2 (M:L) ratio, which was supported by DFT calculations. The complexes and their respective ligands were evaluated against bacterial and fungal strains with clinical relevance. All the complexes showed higher antibacterial and antifungal activities than the free ligands. The complexes were more active against fungi than against bacteria. The activities of the chromium complexes against Candida tropicalis are of great interest, as they showed minimum inhibitory concentration 50 (MIC50) values between 7.8 and 15.6 μg mL−1. Complexes 5 and 6 showed little effect on Vero cells, indicating that they are not cytotoxic. These results can provide an important platform for the design of new compounds with antibacterial and antifungal activities.

scholarly journals Gel Formulation of Ethyl Acetate Garlic Extraction and Its Activity Against Staphylococcus Epidermis

2019 ◽  
Vol 1 (2) ◽  
pp. 69-78
Author(s):  
Khairan Khairan
Keyword(s):  
Ethyl Acetate ◽  
Staphylococcus Epidermidis ◽  
Antimicrobial Activities ◽  
Phytochemical Screening ◽  
Viscosity Property ◽  
Antibacterial And Antifungal Activities ◽  
Staphylococcus Epidermis ◽  
Homogeneity Property ◽  
The Stability ◽  
Antibacterial And Antifungal

Garlic is known to have antibacterial and antifungal activities. This research aims to formulate the gel materials extracted from the garlic and to investigate the antimicrobial activities to Staphylococcus epidermidis. The phytochemical screening showed that the gel materials of ethyl acetate consisted alkaloid, flavonoid, and saponin substances. The formulation of gel was synthesized with different variations of 1, 5, and 10%. In this research, the gel materials were analyzed to understand the stability, homogeneity, pH, viscosity and dispersive powers.  The results showed that good abilities of gel based on the taste, aroma and consistency, while the homogeneity property of each samples is influenced by the presence of gel concentration. The viscosity property of gels accounted for 3201.02-1664.04 Cps with 2.95-3.8 cm of dispersive powers. The ability of antimicrobial showed that higher concentration of 5% and 10% gels showed greater inhibitory zones of 18,10 and 22,08 mm compared to 1% of concentration

scholarly journals Synthesis,Characterization and Evaluation of the Anticancer and Antimicrobial Activities of Some Novel Benzazole and Benzazine Derivatives

2007 ◽  
Vol 3 (3) ◽  
pp. 252-263
Author(s):  
Wesam Saber Shehab ◽  
Naglaa Z.H. Eleiwa ◽  
Samar.M. Mouneir
Keyword(s):  
Cancer Cells ◽  
Benzimidazole Derivative ◽  
Coupling Reaction ◽  
Antimicrobial Activities ◽  
Spectral Studies ◽  
Design Modification ◽  
Future Design ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal

The present study was designed to synthesize  and develop new useful lead compounds (some novel benzazole and benzazine derivatives ) of simple structure , exhibiting optimal in vitro anticancer  and antimicrobial potency. Phenylenediamine derivative 1 was condensed  with  dithiocarboxylic acid derivatives 2 and produced   benzimidazole derivative 4. The benzotriazepines 8 and 10  were formed by the reaction of 1 with dicarbonyl derivatives followed by intermolecular coupling reaction. The synthesis of benzotriazine12, benzotriazole 14,17, benzimidazole16 and benzothiadiazine 19 from compound 1 was also described. The Synthesized Compounds were characterized by Spectral Studies like IR, H1 – NMR and Analysis Spectra .The title compounds were screened for their possible In vitro anticancer and antimicrobial activities. Among the synthesized compounds, some have shown promisingly remarkable activities against  different  cancer cell lines (MCF-7 human breast cancer cells, HepG2 human hepatocarcinoma cells and PC3 human prostate cancer cells)and moderate  to high antibacterial and antifungal activities. The obtained results showed that the most active compounds could be useful as a template for future design, modification and investigation to produce more active analogs.

Synthesis and investigation of 3,5-bis-linear and macrocyclic tripeptidopyridine candidates by using l-valine, N,N′-(3,5-pyridinediyldicarbonyl)bis-dimethyl ester as synthon

2019 ◽  
Vol 74 (6) ◽  
pp. 473-478 ◽  
Author(s):  
Abd El-Galil E. Amr ◽  
Ahmed M. Naglah ◽  
Nermien M. Sabry ◽  
Alhussein A. Ibrahim ◽  
Elsayed A. Elsayed ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Candida Albicans ◽  
Organic Molecules ◽  
Biological Activities ◽  
Dimethyl Ester ◽  
Antimicrobial Activities ◽  
Current Work ◽  
Antifungal Activities ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal

AbstractInterest in the synthesis of heterocyclic organic molecules with peptide moieties has gained attention due to their potential biological activities. The current work aimed at synthesizing new macrocyclic tripeptide imides and evaluating their possible antimicrobial activities. A series of 11 derivatives were prepared from dimethyl 3,5-pyridinevalinyl ester either by NaOH or NH2NH2 treatment, followed by cyclization and further reaction with NaOH or NH2NH2. The majority of synthesized derivatives showed promising antibacterial and antifungal activities in comparison to standard known antibiotics. Compounds 5a and 7b showed the most potential antibacterial against Staphylococcus aureus and antifungal activities against Candida albicans, respectively.

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