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Schuch JM, Mendes CR, Cardoso GL, André da Veiga Lima Rosa Costamilan C, Matos Lopes PR, Montagnolli RN, Dilarri G, Bidoia ED. Neem Essential Oil as an Antifungal Agent against Phyllosticta citricarpa. Int J Microbiol 2024; 2024:6251407. [PMID: 39071039 PMCID: PMC11281856 DOI: 10.1155/2024/6251407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 05/28/2024] [Accepted: 07/02/2024] [Indexed: 07/30/2024] Open
Abstract
The fungus Phyllosticta citricarpa is a quarantine phytopathogen responsible for causing citrus black spot (CBS) disease. To export fruits to CBS-free countries, they must undergo a sanitation process to ensure disease control. In this study, neem essential oil (NEO) was tested against P. citricarpa for the first time as an alternative sanitizer. In vitro experiments were conducted to determine the inhibition concentration of NEO for P. citricarpa, and the mode of action of the essential oil was evaluated. In vivo assays were performed to simulate the sanitization process used in packinghouses. NEO was characterized by GC-MS/MS. The results revealed that NEO at 100 μL·mL-1 exhibited a similar inhibitory effect as copper oxychloride, suppressing 89.68 ± 1.14% of fungal mycelium growth. Fluorescence microscopy experiments demonstrated that NEO functions by disrupting the cytoplasmic membrane of fungal hyphae, leading to their death within 30 minutes of contact with NEO. GC-MS/MS characterization revealed a high presence of phenolic compounds, which serve as the primary antifungal agents responsible for the action against fungal hyphae. In vivo assays showed that NEO at 100 μL·mL-1 also reduced microorganisms (CFU mL-1) by 93.00 ± 3.88% compared to the negative control. Overall, the results demonstrate that NEO can effectively serve as an alternative sanitizer against P. citricarpa in citrus packinghouses. Our findings allow future studies to explore the use of NEO for sanitizing other fruits and combating different phytopathogens to broaden its potential application in fruit sanitation for export.
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Affiliation(s)
- Joyce Maria Schuch
- Department of General and Applied BiologySao Paulo State University (UNESP), Avenida 24-A 1515 Postal Code: 13506-900, Rio Claro, SP, Brazil
| | - Carolina Rosai Mendes
- Department of General and Applied BiologySao Paulo State University (UNESP), Avenida 24-A 1515 Postal Code: 13506-900, Rio Claro, SP, Brazil
| | - Guilherme Lopes Cardoso
- Department of Fisheries Engineering and Biological SciencesSanta Catarina State University (UDESC), Rua Coronel Fernandes Martins 270 Postal Code: 88790-000, Laguna, SC, Brazil
| | - Carlos André da Veiga Lima Rosa Costamilan
- Department of Fisheries Engineering and Biological SciencesSanta Catarina State University (UDESC), Rua Coronel Fernandes Martins 270 Postal Code: 88790-000, Laguna, SC, Brazil
| | - Paulo Renato Matos Lopes
- College of Technology and Agricultural SciencesSao Paulo State University (UNESP), SP-294 Km 651 Postal Code: 17900-000, Dracena, SP, Brazil
| | - Renato Nallin Montagnolli
- Department of Natural SciencesMathematics and EducationFederal University of Sao Carlos (UFSCar), SP-330 Km 174 Postal Code: 13600-970, Araras, SP, Brazil
| | - Guilherme Dilarri
- Department of Fisheries Engineering and Biological SciencesSanta Catarina State University (UDESC), Rua Coronel Fernandes Martins 270 Postal Code: 88790-000, Laguna, SC, Brazil
- Multicentric Graduate Program in Biochemistry and Molecular Biology (PMBqBM)Santa Catarina State University (UDESC), Avenida Luiz de Camões 2090 Postal Code: 88520-000, Lages, SC, Brazil
| | - Ederio Dino Bidoia
- Department of General and Applied BiologySao Paulo State University (UNESP), Avenida 24-A 1515 Postal Code: 13506-900, Rio Claro, SP, Brazil
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Khan SA, Khan H, Ahmad S, Rehman FU, Khan AA, Khan MA. GCMS characterization and biological potential of the seeds and aerial part of Galium tricorne Stokes. BRAZ J BIOL 2024; 84:e256920. [DOI: 10.1590/1519-6984.256920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 02/12/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract Natural products have long been proven very effective against various challenging diseases including cancer and bacterial infections. Galium tricorne is one of the important source of natural products, which has not been explored till date in spite of its profound ethnomedicinal prominence. The current study has been designed to explore the biological potential of G. tricorne and to extract and isolate chemical constituents from its aerial part and seeds respectively along with identification of their chemical constituents. Phytochemical screening was performed to figure out the presence of secondary metabolite in G. tricorne. Crude Methanolic extract (Gt.Crd), which was obtained from the aerial part while the fatty acids were extracted from the seeds, which were later on analyzed by GCMS. Similarly, Well Diffusion and MTT method were used for antibacterial activity and cancer cell line assay respectively. To evaluate the cytotoxic potential, brine shrimps were used. Likewise, in Gas Chromatography-Mass Spectroscopy (GC-MS) analysis a total number of 23 compounds were identified in Gt.Crd extract out of which 7 compounds were sorted out to have some sort of toxicity profile. In the same fashion, 5 fatty acids were identified in the seeds of G. tricorne. Moreover, among the fractions, chloroform fraction (Gt.Chf) exhibited greater zone of inhibition (ZOI) 20.37 mm followed by Gt.Crd 18.40 mm against S. aureus and S. pyogenes respectively. In cytotoxicity Gt.Chf was more active followed by ethyl acetate fraction (Gt.Eta) by exhibiting 88.32±0.62% (LC50=60 µg/mL) and 73.95±2.25% (LC50=80 µg/mL) respectively at 1000 µg/mL concentration of the tested sample. Gt.Chf exhibited greater cell line inhibitory activity (IC50=61 µg/mL) against HeLa cell line. Similarly, Gt.Crd displayed IC50 values of 167.84 µg/mL and 175.46 µg/mL against HeLa and NIH/3T3 cell line respectively. Based on the literature review and screenings, it may be concluded that the aerial part and seeds of G. tricorne are the rich sources of bioactive compounds. The results of the current study also authenticate the scientific background for the ethnomedicinal uses of G. tricorne.
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Affiliation(s)
| | | | - S. Ahmad
- Sarhad University of Science & Information Technology, Pakistan
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Amer SA, Gouda A, Saleh GK, Nassar AH, Abdel-Warith AWA, Younis EM, Altohamy DE, Kilany MS, Davies SJ, Omar AE. Dietary Frankincense ( Boswellia serrata) Oil Modulates the Growth, Intestinal Morphology, the Fatty Acid Composition of Breast Muscle, Immune Status, and Immunoexpression of CD3 and CD20 in Broiler Chickens. Animals (Basel) 2023; 13:ani13060971. [PMID: 36978513 PMCID: PMC10044135 DOI: 10.3390/ani13060971] [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: 01/23/2023] [Revised: 03/04/2023] [Accepted: 03/06/2023] [Indexed: 03/30/2023] Open
Abstract
This investigation explored the impact of dietary frankincense resin oil (FO) on growth performance parameters, intestinal histomorphology, fatty acid composition of the breast muscle, and the immune status of broilers. We allotted 400, three-day-old, male chicks (Ross 308 broiler) into four treatment groups (ten replicates/group; ten chicks/replicate). They were fed a basal diet with different concentrations of FO (0, 200, 400, and 600 mg kg-1). FO supplementation increased the overall body weight (BW) and body weight gain (BWG) by different amounts, linearly improving the feed conversion ratio with the in-supplementation level. Total feed intake (TFI) was not affected. Growth hormones and total serum protein levels also linearly increased with the FO level, while albumin was elevated in the FO600 group. Moreover, total globulins increased linearly in FO400 and FO600 treatment groups. Thyroxin hormone (T3 and T4) levels increased in all FO treatment groups without affecting glucose and leptin serum values. Different concentrations of FO supplementation in the diet increased the activities of Complement 3, lysozyme, and interleukin 10 levels in the serum. Dietary FO in broilers increased the total percentage of n-3 and n-6 fatty acids. It also increased the ratio of n-3 to n-6 linearly and quadratically. Additionally, FO supplementation led to the upregulation of immune clusters of differentiation 3 and 20 (CD3 and CD20) in the spleen, along with improving most of the morphometric measures of the small intestine. In conclusion, FO up to 600 mg kg-1 as a feed additive in broiler chicken production is valuable for promoting their growth, intestinal histomorphology, and immune status along with enriching breast muscle with polyunsaturated fatty acids (PUFA).
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Affiliation(s)
- Shimaa A Amer
- Department of Nutrition and Clinical Nutrition, Veterinary Medicine Faculty, Zagazig University, Zagazig 44511, Egypt
| | - Ahmed Gouda
- Department of Animal Production, Agricultural & Biological Research Division, Center of National Research, Dokki, Cairo 11865, Egypt
| | - Gehan K Saleh
- Biochemistry Department, Animal Health Research Institute (AHRI) (Mansoura Branch) Agriculture Research Center (ARC), Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Arwa H Nassar
- Food Hygiene Department, Animal Health Research Institute (AHRI) (Mansoura Branch) Agriculture Research Center (ARC), Dokki, P.O. Box 246, Giza 12618, Egypt
| | - Abdel-Wahab A Abdel-Warith
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Elsayed M Younis
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Dalia E Altohamy
- Department of Pharmacology, Central Laboratory, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt
| | - Maha S Kilany
- Department of Histology and Cytology, Veterinary Medicine Faculty, Zagazig University, Zagazig 44511, Egypt
| | - Simon J Davies
- School of Science and Engineering, National University of Ireland Galway Republic of Ireland, H91 TK33 Galway, Ireland
| | - Anaam E Omar
- Department of Nutrition and Clinical Nutrition, Veterinary Medicine Faculty, Zagazig University, Zagazig 44511, Egypt
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Application of Green Technology to Extract Clean and Safe Bioactive Compounds from Tetradesmus obliquus Biomass Grown in Poultry Wastewater. Molecules 2023; 28:molecules28052397. [PMID: 36903642 PMCID: PMC10005368 DOI: 10.3390/molecules28052397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Microalgae are capable of assimilating nutrients from wastewater (WW), producing clean water and biomass rich in bioactive compounds that need to be recovered from inside the microalgal cell. This work investigated subcritical water (SW) extraction to collect high-value compounds from the microalga Tetradesmus obliquus after treating poultry WW. The treatment efficiency was evaluated in terms of total Kjeldahl nitrogen (TKN), phosphate, chemical oxygen demand (COD) and metals. T. obliquus was able to remove 77% TKN, 50% phosphate, 84% COD, and metals (48-89%) within legislation values. SW extraction was performed at 170 °C and 30 bar for 10 min. SW allowed the extraction of total phenols (1.073 mg GAE/mL extract) and total flavonoids (0.111 mg CAT/mL extract) with high antioxidant activity (IC50 value, 7.18 µg/mL). The microalga was shown to be a source of organic compounds of commercial value (e.g., squalene). Finally, the SW conditions allowed the removal of pathogens and metals in the extracts and residues to values in accordance with legislation, assuring their safety for feed or agriculture applications.
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Chemical Profiling and Evaluation of Toxicological, Antioxidant, Anti-inflammatory, Anti-nociceptive and Tyrosinase Inhibitory Potential of Portulacaria afra using in-vitro, In-vivo and In-silico studies. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023] Open
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Hagos M, Yaya EE, Chandravanshi BS, Redi-Abshiro M. Analysis of volatile compounds in flesh, peel and seed parts of pumpkin ( Cucurbita maxima) cultivated in Ethiopia using gas chromatography-mass spectrometry (GC-MS). INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2022. [DOI: 10.1080/10942912.2022.2088787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Mulu Hagos
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Estifanos Ele Yaya
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Bhagwan Singh Chandravanshi
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Mesfin Redi-Abshiro
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Biological control of Fusarium tomato-wilt disease by cyanobacteria Nostoc spp. Arch Microbiol 2022; 204:116. [PMID: 34985603 DOI: 10.1007/s00203-021-02673-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/30/2021] [Accepted: 10/17/2021] [Indexed: 01/06/2023]
Abstract
This study investigated the effect of foliar application of extract and culture of Nostoc calcicola and Nostoc linckia on the Fusarium oxysporum f. sp. lycopersici (FOL) that infects tomatoes (Solanum lycopersicum) plant in vitro and in vivo. Cyanobacterial isolates were isolated from saline soils at El-Hamoul and Seidy Salem locations Kafr Elsheikh, Egypt, and identified to be N. calcicola and N. linckia Bioactive compounds of extract were analyzed by Gas chromatography-mass spectrometry (GC-MS). Dry weight, carotene, chlorophyll content, and total phenolic compounds of isolates were measured. Plant height, dry weight, fruit number, and fruit weight of tomatoes were estimated. GC/MS analysis showed 49 and 35 bioactive compounds in extracts of N. calcicola and N. linckia, respectively. N. calcicola possesses the highest values of chlorophyll a, carotenoid, and total phenol contents in dry weight compared with N. linckia. After 100 days of tomato growth, the results showed the highest yield of tomato fruits with the application of N. calcicola and N. linckia compared with the untreated plants and the plants which were infected with Fusarium, suggesting that N. calcicola and N. linckia can serve as a new bioagent for biological control of the soil fungus Fusarium oxysporum f. sp. lycopersici (FOL).
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Jobil AJ, Parameshwari S, Husain FM, Alomar SY, Ahmad N, Albalawi F, Alam P. Scientifically Formulated Avocado Fruit Juice: Phytochemical Analysis, Assessment of Its Antioxidant Potential and Consumer Perception. Molecules 2021; 26:7424. [PMID: 34946505 PMCID: PMC8706416 DOI: 10.3390/molecules26247424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/18/2021] [Accepted: 11/27/2021] [Indexed: 12/05/2022] Open
Abstract
The study's purpose was to find and create a nourishing fruit juice made from avocado to suit nutritional and health demands. In this regard, the avocado juice was formulated using a statistical technique, and its biochemical and phytochemical characteristics were evaluated. Statistically formulated fruit juice was evaluated for its sensory characteristics, proximate composition, nutrients and vitamins, total phenols and flavonoids, and for its antioxidant ability, in addition to a shelf-life test. The optimal amount of all ingredients included in the mathematical model for the preparation of the juice was 150 g of Persea americana (Avocado) fruit pulp, 12.5 g of honey and 100 mL of water. In fact, the composition of avocado juice was found to have higher phenolic (910.36 ± 0.215 mg EAG g-1/mL) and flavonoid (56.32 ± 1.26 mg QE g-1/ mL) amounts. DPPH, ABTS and FRAP antioxidant assays tended to be high compared with a standard. The shelf-life analysis indicated that the processed avocado juice (V7) had a long shelf life. In view of all these merits, a statistically formulated recipe for avocado fruit juice was recommended for the formulation of the most preferred health drink.
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Affiliation(s)
- Arackal Jose Jobil
- Department of Food Technology, Saintgits College of Engineering, Pathamuttom, Kottayam 686532, Kerala, India;
- Department of Nutrition and Dietetics, Periyar University, Salem 636011, Tamil Nadu, India
| | | | - Fohad Mabood Husain
- Department of Food Science and Nutrition, King Saud University, Riyadh 11451, Saudi Arabia
| | | | - Naushad Ahmad
- Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Fadwa Albalawi
- Department of Zoology, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Pravej Alam
- Department of Biology, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
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Joghee S, Kalarikkal SP, Sundaram GM, Durai Ananda Kumar T, Chidambaram SB. Chemical profiling and in-vitro anti-inflammatory activity of bioactive fraction(s) from Trichodesma indicum (L.) R.Br. against LPS induced inflammation in RAW 264.7 murine macrophage cells. JOURNAL OF ETHNOPHARMACOLOGY 2021; 279:114235. [PMID: 34044081 DOI: 10.1016/j.jep.2021.114235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/04/2021] [Accepted: 05/20/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Trichodesma indicum (L.) R. Br. (family: Boraginaceae) is a medicinal herb largely used to treat arthralgia, rheumatoid arthritis, wound healing, dysentery, etc. It's mechanism of anti-inflammatory activity has not been systematically analyzed yet. AIM OF THE STUDY The present study was undertaken to examine the anti-inflammatory effects of successive solvent extracts (n-hexane extract (HE), ethyl acetate extract (EA), ethanol extract (EE), aqueous extract (AE) and fractions of HE) from the aerial parts of Trichodesma indicum (TI) against lipopolysaccharide (LPS) stimulated inflammatory reaction using mouse macrophage RAW 264.7 cells. MATERIALS AND METHODS Cytotoxic effects of the extracts and fractions of TI were assessed by MTT assay. The effect of extracts and fractions on the production of nitric oxide (NO) in RAW 264.7 macrophages were measured using the Griess reagent method. IL - 6, IL - 1β, TNF-α, iNOS and COX-2 gene expressions were examined by a qRT-PCR method. RESULTS RAW 264.7 macrophages pretreated with HE, EA, EE and AE of TI showed a significant decrease in the production of proinflammatory cytokines and NO without exhibiting cytotoxicity. The potent HE was fractionated using flash chromatography into FA, FB, FC, FD and FE. Among the five fractions, FE displayed a stronger ability to reduce IL - 1β, TNF-α, iNOS, COX2 and NO importantly no cytotoxicity was observed. The phytochemical compounds present in FE were further screened by Gas chromatography - Mass spectroscopy (GC-MS). GC-MS analysis revealed that 1,2-benzenedicarboxylic acid diisooctyl ester is the major compound in FE. Molecular docking analysis showed good inhibition of 1,2-benzenedicarboxylic acid diisooctyl ester against TLR-4, NIK and TACE. CONCLUSION Our results suggested that 1,2-benzenedicarboxylic acid diisooctyl ester could be a potential candidate in alleviating inflammatory reactions in TI.
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Affiliation(s)
- Suresh Joghee
- Department of Pharmacognosy, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India.
| | - Sreeram P Kalarikkal
- Department of Molecular Nutrition, Central Food Technological Research Institute, Cheluvamba Mansion, Mysore-570020, Karnataka, India.
| | - Gopinath M Sundaram
- Department of Molecular Nutrition, Central Food Technological Research Institute, Cheluvamba Mansion, Mysore-570020, Karnataka, India.
| | - T Durai Ananda Kumar
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India.
| | - Saravana Babu Chidambaram
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India; Centre for Experimental Pharmacology & Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru-570015, Karnataka, India.
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Li X, Zhang M, Qi D, Zhou D, Qi C, Li C, Liu S, Xiang D, Zhang L, Xie J, Wang W. Biocontrol Ability and Mechanism of a Broad-Spectrum Antifungal Strain Bacillus safensis sp. QN1NO-4 Against Strawberry Anthracnose Caused by Colletotrichum fragariae. Front Microbiol 2021; 12:735732. [PMID: 34603266 PMCID: PMC8486013 DOI: 10.3389/fmicb.2021.735732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/18/2021] [Indexed: 12/19/2022] Open
Abstract
Strawberry is a very popular fruit with a special taste, color, and nutritional value. Anthracnose caused by Colletotrichum fragariae severely limits fruit shelf life during post-harvest storage. Use of traditional chemical fungicides leads to serious environment pollution and threatens food safety. Biocontrol is considered as a promising strategy to manage the post-harvest fruit diseases. Here, strain QN1NO-4 isolated from noni (Morinda citrifolia L.) fruit exhibited a high antifungal activity against C. fragariae. Based on its physicochemical profiles and phylogenetic tree of the 16S rRNA sequence, strain QN1NO-4 belonged to the genus Bacillus. The average nucleotide identity (ANI) calculated by comparing two standard strain genomes was below 95-96%, suggesting that the strain might be a novel species of the genus Bacillus and named as Bacillus safensis sp. QN1NO-4. Its extract effectively reduced the incidence of strawberry anthracnose of harvested fruit. Fruit weight and TSS contents were also maintained significantly. The antifungal mechanism assays indicated that the extract of the test antagonist inhibited mycelial growth and spore germination of C. fragariae in vitro. Cells of strain QN1NO-4 demonstrated the cytoplasmic heterogeneity, disappeared organelles, and ruptured ultrastructure. Notably, the strain extract also had a broad-spectrum antifungal activity. Compared with the whole genome of strain QN1NO-4, several functional gene clusters involved in the biosynthesis of active secondary metabolites were observed. Fifteen compounds were identified by gas chromatography-mass spectrometry (GC-MS). Hence, the fruit endophyte B. safensis sp. QN1NO-4 is a potential bio-agent identified for the management of post-harvest disease of strawberry fruit.
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Affiliation(s)
- Xiaojuan Li
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.,Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Science, Hainan Normal University, Haikou, China.,College of Ecology and Environment, Hainan University, Haikou, China
| | - Miaoyi Zhang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Dengfeng Qi
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Dengbo Zhou
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Chunlin Qi
- College of Ecology and Environment, Hainan University, Haikou, China
| | - Chunyu Li
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Siwen Liu
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Dandan Xiang
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Key Laboratory of Tropical and Subtropical Fruit Tree Research of Guangdong Province, Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Lu Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Science, Hainan Normal University, Haikou, China
| | - Jianghui Xie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Unravelling the bioprospects of mycoendophytes residing in Withania somnifera for productive pharmaceutical applications. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abutaha N, AL-Zharani M, Alotaibi A, Cordero MAW, Bepari A, Alarifi S. In vitro and in vivo investigation of polypharmacology of propolis extract as anticancer, antibacterial, anti-inflammatory, and chemical properties. OPEN CHEM 2021. [DOI: 10.1515/chem-2021-0076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Numerous compounds derived from natural sources such as microbes, plants, and insects have proven to be safe, efficacious, and cost-effective therapeutics for human diseases. This study examined the bioactivities of propolis, a structural sealant and antibacterial/antifungal agent produced by honey bees. Chinese propolis was extracted in methanol or hexane. Propolis significantly reduced the numbers of viable cancer cells when applied as a methanol extract (IC50 values in μg/mL for the indicated cell line: MDA-MB-231, 74.12; LoVo, 74.12; HepG2, 77.74; MCF7, 95.10; A549, 114.84) or a hexane extract (MDA-MB-231, 52.11; LoVo, 45.9; HepG2, 52.11; MCF7, 78.01; A549, 67.90). Hexane extract also induced apoptosis of HepG2 cells according to activated caspase-3/7 expression assays (17.6 ± 2.9% at 150 μg/mL and 89.2 ± 1.9% at 300 μg/mL vs 3.4 ± 0.4% in vehicle control), suppressed the growth of Candida albicans and multiple multidrug-resistant and nonresistant Gram-positive bacteria, and inhibited croton oil-induced skin inflammation when applied as topical treatment. GC-MS identified hexadecanoic acid methyl ester as a major constituent (33.6%). Propolis hexane extract has potential anticancer, antimicrobial, and anti-inflammatory activities.
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Affiliation(s)
- Nael Abutaha
- Bioproducts Research Chair, Department of Zoology, College of Science, King Saud University , Riyadh 11451 , Saudi Arabia
| | - Mohammed AL-Zharani
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU) , Riyadh 11623 , Saudi Arabia
| | - Amal Alotaibi
- Department of Basic Health Science, College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh , Saudi Arabia
| | - Mary Anne W. Cordero
- Department of Basic Health Science, College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh , Saudi Arabia
| | - Asmatanzeem Bepari
- Department of Basic Health Science, College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh , Saudi Arabia
| | - Saud Alarifi
- Department of Zoology, College of Science, King Saud University , Riyadh , Saudi Arabia
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Oligosaccharides: Defense Inducers, Their Recognition in Plants, Commercial Uses and Perspectives. Molecules 2020; 25:molecules25245972. [PMID: 33339414 PMCID: PMC7766089 DOI: 10.3390/molecules25245972] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/28/2020] [Accepted: 12/01/2020] [Indexed: 01/18/2023] Open
Abstract
Plants have innate immune systems or defense mechanisms that respond to the attack of pathogenic microorganisms. Unlike mammals, they lack mobile defense cells, so defense processes depend on autonomous cellular events with a broad repertoire of recognition to detect pathogens, which compensates for the lack of an adaptive immune system. These defense mechanisms remain inactive or latent until they are activated after exposure or contact with inducing agents, or after the application of the inductor; they remain inactive only until they are affected by a pathogen or challenged by an elicitor from the same. Resistance induction represents a focus of interest, as it promotes the activation of plant defense mechanisms, reducing the use of chemical synthesis pesticides, an alternative that has even led to the generation of new commercial products with high efficiency, stability and lower environmental impact, which increase productivity by reducing not only losses but also increasing plant growth. Considering the above, the objective of this review is to address the issue of resistance induction with a focus on the potential of the use of oligosaccharides in agriculture, how they are recognized by plants, how they can be used for commercial products and perspectives.
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Lalthanpuii PB, Lalchhandama K. Phytochemical analysis and in vitro anthelmintic activity of Imperata cylindrica underground parts. BMC Complement Med Ther 2020; 20:332. [PMID: 33158437 PMCID: PMC7648271 DOI: 10.1186/s12906-020-03125-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 10/21/2020] [Indexed: 11/30/2022] Open
Abstract
Background Imperata cylindrica is considered as an agricultural weed, but it is a valuable plant in the traditional medicines of Southeast Asia. In the Mizo traditional medicine of India and Myanmar, the rhizomes and roots are used as a remedy for bacterial, fungal and intestinal helminth infections. Methods An extract of the whole underground parts was prepared in Soxhlet apparatus using chloroform as a solvent. After concentrating in a vacuum rotary evaporator, the extract was analysed using gas chromatography-mass spectrometry. Anthelmintic activity was tested in vitro against the tapeworm Raillietina tetragona and the roundworm Ascaridia galli. Scanning electron microscopy was used to examine the structural changes on the helminths after treatment with the plant extract. Results Twenty-two compounds were identified from the plant extract out of which fatty acids were the predominant compounds. Palmitic acid was the most abundant. Bioactive phytosterols such as campesterol and stigmasterol were also detected. The plant extract was significantly effective on both the helminths and showed dose-dependent anthelmintic activity as that of albendazole. The tapeworm treated with the plant extract showed deformities on the suckers, clumping of the spines, tegumental folds and erosion of microtriches. Extensive damage was also seen on the roundworm including cuticular shrinkage, collapse of the lips, and formation of warty surface throughout the body. Conclusion I. cylindrica extract effectively killed and caused detrimental effects on parasitic tapeworm and roundworm. The study therefore validates the traditional usage among the Mizo people, and guarantees further investigation on the exact compound(s) and mechanism of action.
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Affiliation(s)
| | - Kholhring Lalchhandama
- Department of Life Sciences, Pachhunga University College, Aizawl, Mizoram, 796001, India.
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15
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Anand S, Deighton M, Livanos G, Pang ECK, Mantri N. Agastache honey has superior antifungal activity in comparison with important commercial honeys. Sci Rep 2019; 9:18197. [PMID: 31796803 PMCID: PMC6890684 DOI: 10.1038/s41598-019-54679-w] [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: 04/29/2019] [Accepted: 11/04/2019] [Indexed: 02/07/2023] Open
Abstract
There is an urgent need for new effective antifungal agents suitable for the treatment of superficial skin infections, since acquired resistance of fungi to currently available agents is increasing. The antifungal activity of mono-floral Agastache honey and commercially available honeys were tested against dermatophytes (T. mentagrophytes and T. rubrum) and C. albicans (ATCC 10231 and a clinical isolate) by agar well diffusion and micro-dilution (AWD and MD). In AWD and MD assays, Agastache honey was effective at 40% concentration against dermatophytes (zone diameter, 19.5–20 mm) and C. albicans with the same MIC and MFC values indicating fungicidal activity. Tea tree honey was effective at 80% concentration (zone diameter, 14 mm) against dermatophytes and at 40% concentration against T. mentagrophytes and C. albicans. Manuka was effective at 80% concentration only against T. mentagrophytes (zone diameter, 12 mm) and at 40% against T. rubrum and C. albicans with fungistatic activity. Similar to the AWD results, Jelly bush, Super Manuka, and Jarrah showed no activity against dermatophytes but showed some activity against C. albicans. Headspace volatiles of six honeys were isolated by SPME and identified by GC-MS. The characteristic chemical markers for each honey were as follows: Agastache- Phenol, 2,4-bis(1,1-dimethylethyl) and Estragole; Manuka and Tea-tree- Acetanisole and Methyl 3,5-dimethoxybenzoate; Jelly bush- Linalool and Nonanal; Super Manuka- Methyl 3,5-dimethoxybenzoate and Nonanal; Jarrah- Isophorone and Nonanoic acid. Overall, analysis of the bioactive compound content and antifungal activity of Agastache honey indicated possible use as an antifungal agent for management of superficial fungal infections.
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Affiliation(s)
- Sushil Anand
- The Pangenomics Group, School of Science, RMIT University, Melbourne, 3083, Victoria, Australia.
| | - Margaret Deighton
- The Pangenomics Group, School of Science, RMIT University, Melbourne, 3083, Victoria, Australia
| | - George Livanos
- Kenkay Pharmaceuticals Pty Ltd., Smeaton Grange, 2567, NSW, Australia
| | - Edwin Chi Kyong Pang
- The Pangenomics Group, School of Science, RMIT University, Melbourne, 3083, Victoria, Australia
| | - Nitin Mantri
- The Pangenomics Group, School of Science, RMIT University, Melbourne, 3083, Victoria, Australia.
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16
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Lu X, Sun D, Rookes JE, Kong L, Zhang X, Cahill DM. Nanoapplication of a Resistance Inducer to Reduce Phytophthora Disease in Pineapple ( Ananas comosus L.). FRONTIERS IN PLANT SCIENCE 2019; 10:1238. [PMID: 31681361 PMCID: PMC6797602 DOI: 10.3389/fpls.2019.01238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 09/05/2019] [Indexed: 05/06/2023]
Abstract
Treatment of plants with a variety of abiotic and biotic inducers causes induced resistance to pathogen attack. In this study, the effect of four resistance inducers on plant diseases caused by Phytophthora cinnamomi was screened in vivo initially by using lupin, a susceptible model plant. Lupin pretreated with 0.5 mM salicylic acid (SA) showed effective resistance against P. cinnamomi with restricted lesions. Then, mesoporous silica nanoparticles (MSNs) with particle size around 20 nm and approximate pore size of 3.0 nm were synthesized and functionalized for loading and importing SA to pineapple plantlets. Decanethiol gatekeepers were introduced to the surface of MSNs via glutathione (GSH)-cleavable disulfide linkages to cover the pore entrance, which was confirmed through using Raman spectroscopy. Through free diffusion, the loading efficiency of SA in MSNs gated with gatekeepers was 11.7%, but was lower in MSNs without gatekeepers (8.0%). In addition, in vitro release profile of SA from gatekeeper-capped MSNs indicated that higher concentrations of GSH resulted in more cargo release. Moreover, the experiments in planta showed that the application of MSNs as a resistance inducer delivery system significantly improved pineapple resistance to P. cinnamomi in terms of inhibiting lesion development and improving root growth of infected plants, compared to the use of free SA and MSNs without gatekeepers. The analysis of SA, GSH, and defense-related genes, of PR1 and PR5, further confirmed that the slow and prolonged release of SA from MSNs inside the roots of pineapple plants was achieved through a redox-stimuli release mechanism. Therefore, the application of MSNs with redox-responsive gatekeepers has shown great potential as an efficient tool for delivering chemicals into plants in a controllable way.
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Affiliation(s)
- Xinhua Lu
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia
| | - Dequan Sun
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
| | - James E. Rookes
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia
| | - Lingxue Kong
- Institute for Frontier Materials, Deakin University, Geelong, VIC, Australia
| | - Xiumei Zhang
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
| | - David M. Cahill
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia
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Qi D, Zou L, Zhou D, Chen Y, Gao Z, Feng R, Zhang M, Li K, Xie J, Wang W. Taxonomy and Broad-Spectrum Antifungal Activity of Streptomyces sp. SCA3-4 Isolated From Rhizosphere Soil of Opuntia stricta. Front Microbiol 2019; 10:1390. [PMID: 31316480 PMCID: PMC6609889 DOI: 10.3389/fmicb.2019.01390] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 06/03/2019] [Indexed: 11/13/2022] Open
Abstract
Actinobacteria are important producers of bioactive compounds. Extreme ecosystems cause evolution of novel secondary metabolic pathways of Actinobacteria and increase the possible discovery of new biological functions of bioactive compounds. Here, we isolated 65 Actinobacteria from rhizosphere soil samples of Opuntia stricta. An Actinobacteria strain (named SCA3-4) was screened against Fusarium oxysporum f. sp. cubense Tropical Race 4 (Foc TR4, ATCC 76255). The strain produced pink-white aerial mycelia and brown substrate mycelium on Gause No. 1 agar. Biverticillate chains of cylindrical spores were observed by scanning electron microscopy (SEM). Based on alignment of 16S rRNA sequences, a constructed phylogenetic tree showed that strain SCA3-4 shared a 99.54% similarity with Streptomyces lilacinus NRRL B-1968T. The morphological, biochemical, physiological, and molecular characteristics further indicated that strain SCA3-4 belongs to the Streptomyces sp. It can grow well on medium with the following antibiotics chloramphenicol, streptomycin, penicillin-G, gentamicin, erythromycin, nystatin or neomycin sulfate. The polymerase chain reaction (PCR) amplification of types I and II polyketide synthase genes (PKS-I and PKS-II) suggested its bioactive potential. Under treatment with 100 μg/ml of ethyl acetate extracts isolated from Streptomyces sp. SCA3-4, growth of Foc TR4 was inhibited and cell membrane was destroyed. Crude extracts also showed a broad-spectrum antifungal activity against 13 phytopathogenic fungi including Foc TR4 and displayed the lowest minimum inhibitory concentration (MIC) (0.781 μg/ml) against Colletotrichum fragariae (ATCC 58718). A total of 21 different compounds identified by gas chromatography-mass spectrometry (GC-MS) were composed of phenolic compound, pyrrolizidine, hydrocarbons, esters, and acids. Besides the known active compounds, Streptomyces sp. SCA3-4 possesses antimicrobial or other biological activities. Further attention will be paid on other compounds with no functional annotation, aiming at the discovery of new bioactive substances.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jianghui Xie
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Wang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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18
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Methanolic Extract of Artemia salina Eggs and Various Fractions in Different Solvents Contain Potent Compounds That Decrease Cell Viability of Colon and Skin Cancer Cell Lines and Show Antibacterial Activity against Pseudomonas aeruginosa. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:9528256. [PMID: 31198432 PMCID: PMC6526577 DOI: 10.1155/2019/9528256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/10/2019] [Accepted: 04/22/2019] [Indexed: 11/29/2022]
Abstract
Artemia salina, crustaceans of class Branchiopoda and order Anostraca, are living and reproducing only in highly saline natural lakes and in other reservoirs where sea water is evaporated to produce salt. Artemia salina eggs can be purchased from pet stores, where they are sold as tropical fish food and a ready source for hatching shrimp. In the current study, methanolic crude extracts and various fractions of Artemia salina eggs extracted in other solvents were tested for effects on cell viability of human colorectal cancer cells (HCT116) and melanoma cells (B16F10) using an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. A methanolic crude extract of eggs was obtained by cold maceration, followed by fractionation to obtain hexane, chloroform, ethyl acetate, n-butanol, and aqueous fractions. The methanolic crude extract decreased cell viability of HCT-116 and B16F10 cell lines at higher concentrations. The other fractions were evaluated using a cell viability assay, and chloroform and hexane showed the highest activity at significantly lower concentrations than did the methanolic fraction. Full scan profiles of the methanolic crude extract and the chloroform and hexane fractions were obtained by gas chromatography mass spectrometry (GC-MS), and the resultant compounds were identified by comparing their spectral data to those available in spectral matching libraries. ROS generation assay, flow cytometry, and western blot analysis provided supporting evidence that the hexane and chloroform fractions induced cell death in HCT116 and B16-F10 cell lines. All fractions were further tested for antibacterial activity against Pseudomonas aeruginosa, among which the hexane fraction showed the highest zone of inhibition on LB nutrient agar plates. This study demonstrated promising anticancer and antibacterial effects of Artemia salina egg extracts. Our results suggest that pure bioactive compounds obtained from Artemia salina eggs can provide new insights into the mechanisms of colon and skin cancer, as well as Pseudomonas aeruginosa inhibition.
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19
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Evaluation of Larvicidal and Repellent Activity of Nanocrystal Emulsion Synthesized from F. glomerata and Neem Oil Against Mosquitoes. J CLUST SCI 2019. [DOI: 10.1007/s10876-019-01611-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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20
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Barbosa Coitinho L, Fumagalli F, da Rosa-Garzon NG, da Silva Emery F, Cabral H. Lapachol biotransformation by filamentous fungi yields bioactive quinone derivatives and lapachol-stimulated secondary metabolites. Prep Biochem Biotechnol 2019; 49:459-463. [DOI: 10.1080/10826068.2019.1591991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Luciana Barbosa Coitinho
- School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Fumagalli
- School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Flavio da Silva Emery
- School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Hamilton Cabral
- School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirão Preto, Brazil
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21
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Volatile Compounds Produced by Cyanobacteria Isolated from Mangrove Environment. Curr Microbiol 2019; 76:575-582. [DOI: 10.1007/s00284-019-01658-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/22/2019] [Indexed: 10/27/2022]
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22
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Das R, Romi W, Das R, Sharma HK, Thakur D. Antimicrobial potentiality of actinobacteria isolated from two microbiologically unexplored forest ecosystems of Northeast India. BMC Microbiol 2018; 18:71. [PMID: 29996765 PMCID: PMC6042205 DOI: 10.1186/s12866-018-1215-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/28/2018] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Actinobacteria are often known to be great producers of antibiotics. The rapid increase in the global burden of antibiotic-resistance with the concurrent decline in the discovery of new antimicrobial molecules necessitates the search for novel and effective antimicrobial metabolites from unexplored ecological niches. The present study investigated the antimicrobial producing actinobacterial strains isolated from the soils of two microbiologically unexplored forest ecosystems, viz. Nameri National Park (NNP) and Panidehing Wildlife Sanctuary (PWS), located in the Eastern Himalayan Biodiversity hotspot region. RESULTS A total of 172 putative isolates of actinobacteria were isolated, of which 24 isolates showed strong antimicrobial bioactivity. Evaluation of the ethyl acetate extracts of culture supernatants against test microbial strains revealed that isolates PWS22, PWS41, PWS12, PWS52, PWS11, NNPR15, NNPR38, and NNPR69 were the potent producers of antimicrobial metabolites. The antimicrobial isolates dominantly belonged to Streptomyces, followed by Nocardia and Streptosporangium. Some of these isolates could be putative novel taxa. Analysis of the antimicrobial biosynthetic genes (type II polyketide synthase and nonribosomal peptide synthetase genes) showed that the antimicrobial metabolites were associated with pigment production and belonged to known families of bioactive secondary metabolites. Characterization of the antimicrobial metabolites of Streptomyces sp. PWS52, which showed lowest taxonomic identity among the studied potent antimicrobial metabolite producers, and their interaction with the test strains using GC-MS, UHPLC-MS, and scanning electron microscopy revealed that the potential bioactivity of PWS52 was due to the production of active antifungal and antibacterial metabolites like 2,5-bis(1,1-dimethylethyl) phenol, benzeneacetic acid and nalidixic acid. CONCLUSIONS Our findings suggest that the unexplored soil habitats of NNP and PWS forest ecosystems of Northeast India harbor previously undescribed actinobacteria with the capability to produce diverse antimicrobial metabolites that may be explored to overcome the rapidly rising global concern about antibiotic-resistance.
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Affiliation(s)
- Ranjita Das
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Paschim Boragaon, Garchuk, Guwahati, Assam 781035 India
| | - Wahengbam Romi
- Molecular Biology and Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam India
| | - Rictika Das
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Paschim Boragaon, Garchuk, Guwahati, Assam 781035 India
| | | | - Debajit Thakur
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology (IASST), Paschim Boragaon, Garchuk, Guwahati, Assam 781035 India
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Devi KR, Srinivasan S, Ravi AV. Inhibition of quorum sensing-mediated virulence in Serratia marcescens by Bacillus subtilis R-18. Microb Pathog 2018; 120:166-175. [DOI: 10.1016/j.micpath.2018.04.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 04/12/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
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24
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Su H, Song S, Yan X, Fang L, Zeng B, Zhu Y. Endogenous salicylic acid shows different correlation with baicalin and baicalein in the medicinal plant Scutellaria baicalensis Georgi subjected to stress and exogenous salicylic acid. PLoS One 2018; 13:e0192114. [PMID: 29438420 PMCID: PMC5810995 DOI: 10.1371/journal.pone.0192114] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/18/2018] [Indexed: 12/20/2022] Open
Abstract
Salicylic acid (SA) is synthesized via the phenylalanine lyase (PAL) and isochorismate synthase (ICS) pathways and can influence the stress response in plants by regulating certain secondary metabolites. However, the association between SA and particular secondary metabolites in the Chinese medicinal plant Scutellaria baicalensis Georgi is unclear. To elucidate the association between SA and the secondary metabolites baicalin and baicalein, which constitute the primary effective components of S. baicalensis, we subjected seedlings to drought and salt stress and exogenous SA treatment in a laboratory setting and tested the expression of PAL and ICS, as well as the content of free SA (FSA), total SA (TSA), baicalin, and baicalein. We also assessed the correlation of FSA and TSA with PAL and ICS, and with baicalin and baicalein accumulation, respectively. The results indicated that both FSA and TSA were positively correlated with PAL, ICS, and baicalin, but negatively correlated with baicalein. The findings of this study improve our understanding of the manner in which SA regulates secondary metabolites in S. baicalensis.
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Affiliation(s)
- Hu Su
- Life Science Department, Nanchang University, Nanchang, Jiangxi Province, China
- Life Science Department, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi Province, China
| | - Shurui Song
- Life Science Department, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi Province, China
| | - Xin Yan
- Life Science Department, Nanchang University, Nanchang, Jiangxi Province, China
| | - Limin Fang
- Life Science Department, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi Province, China
| | - Bin Zeng
- Life Science Department, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi Province, China
| | - Youlin Zhu
- Life Science Department, Nanchang University, Nanchang, Jiangxi Province, China
- * E-mail:
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25
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Song YW, Lim Y, Cho SK. 2,4‑Di‑tert‑butylphenol, a potential HDAC6 inhibitor, induces senescence and mitotic catastrophe in human gastric adenocarcinoma AGS cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1865:675-683. [PMID: 29427610 DOI: 10.1016/j.bbamcr.2018.02.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 02/08/2023]
Abstract
The natural product 2,4‑di‑tert‑butylphenol (DTBP) has a wide spectrum of biological functions, including anticancer activities, although the underlying mechanisms are poorly understood. Here, we found that DTBP induces senescence in human gastric adenocarcinoma AGS cells as evidenced by upregulation of p21 and Rb and increased β‑galactosidase activity. DTBP also induces mitotic catastrophe and generates multinucleated cells, which is accompanied by an increase in the proportion of polymerized tubulin, possibly caused by inhibition of HDAC6 enzyme activity. In silico docking analysis showed that DTBP docked at the entrance of the ligand-binding pocket of the HDAC6 enzyme. Accordingly, DTBP represents a promising lead structure for the development of HDAC6 inhibitors, with an improvement in specificity conferred by modification of the cap group. We propose for the first time that the underlying mechanism of the anticancer activity of DTBP is attributed to inhibition of HDAC6 activity.
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Affiliation(s)
- Yeon Woo Song
- Subtropical/Tropical Organism Gene Bank, Jeju National University, Jeju 63243, Republic of Korea
| | - Yoongho Lim
- Division of Bioscience and Biotechnology, BMIC, Konkuk University, Seoul 143-701, Republic of Korea.
| | - Somi Kim Cho
- Subtropical/Tropical Organism Gene Bank, Jeju National University, Jeju 63243, Republic of Korea; Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, SARI, Jeju 63243, Republic of Korea.
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26
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Salimi F, Hamedi J, Motevaseli E, Mohammadipanah F. Isolation and screening of rare Actinobacteria, a new insight for finding natural products with antivascular calcification activity. J Appl Microbiol 2017; 124:254-266. [PMID: 28990259 DOI: 10.1111/jam.13605] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/09/2017] [Accepted: 09/28/2017] [Indexed: 02/06/2023]
Abstract
AIM Vascular calcification (VC) is a significant pathological process in some life-threatening diseases. Several pathological mechanisms, including transdifferentiation of vascular smooth muscle cells to osteoblast-like cells and apoptosis are involved in VC. Compounds with an inhibitory effect on these processes are potentially efficient medications. In consideration of the multiple biological activities of Actinobacteria, this research was aimed at finding anti-VC metabolite-producing Actinobacteria. METHODS AND RESULTS After the isolation and identification of Actinobacteria, the effect of their fermentation broth extracts on the apoptosis rate was measured using various methods, for example, ethidium bromide/acridine orange staining, DNA laddering and diphenylamine assays. The effect of the most effective fermentation broth extract of Actinobacteria (FBEA) on the mRNA expression of runt-related transcription factor 2 (Runx2) and osteopontin (OPN) was examined. Finally, the most effective FBEA was fractionated and the chemical composition of anti-VC fractions was analysed using GC-MS. Various VC inhibition rates were observed in the tested FBEA (20 μg ml-1 ; 17·9-60·15%). The inhibition of DNA fragmentation was 7-48%. The FBE with the greatest anticalcification activity belonged to Kribbella sp. UTMC 267 and, according to 16S rRNA analysis, Kribbella sancticallisti with a similarity of 98·53% is its nearest neighbour. The FBE of Kribbella sp. UTMC 267 reduced Runx2 mRNA expression by 2·95-fold and OPN mRNA expression by 28·57-fold, both of which are considered significant (P < 0·05). Finally, GC-MS analysis showed the existence of potent anti-oxidative and anti-inflammation agents in FBE of Kribbella sp. UTMC 267. CONCLUSIONS Actinobacterial metabolites can provide a new strategy for treating VC diseases by reducing the expression of osteogenic genes, the apoptosis rate and oxidative stress. SIGNIFICANCE AND IMPACT OF THE STUDY This study highlights the therapeutic potential of Kribbella sp. metabolites and Actinobacteria as a new natural source for drug discovery programs in the nonantibiotic bioactivity field.
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Affiliation(s)
- F Salimi
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.,Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran
| | - J Hamedi
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.,Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran
| | - E Motevaseli
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - F Mohammadipanah
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.,Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran
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Endophytic Nocardiopsis sp. from Zingiber officinale with both antiphytopathogenic mechanisms and antibiofilm activity against clinical isolates. 3 Biotech 2017; 7:115. [PMID: 28567627 DOI: 10.1007/s13205-017-0735-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 04/19/2017] [Indexed: 10/19/2022] Open
Abstract
Novel and potential antimicrobial compounds are essential to tackle the frequently emerging multidrug-resistant pathogens and also to develop environment friendly agricultural practices. In the current study, endophytic actinomycetes from rhizome of Zingiber officinale were explored in terms of its diversity and bioactive properties. Fourteen different organisms were isolated, identified and screened for activity against Pythium myriotylum and human clinical pathogens. Among these, Nocardiopsis sp. ZoA1 was found to have highest inhibition with excellent antibacterial effects compared to standard antibiotics. Remarkable antibiofilm property was also shown by the extract of ZoA1. Its antifungal activity against Pythium and other common phytopathogens was also found to be promising as confirmed by scanning electron microscopic analysis. By PCR-based sequence analysis of phz E gene, the organism was confirmed for the genetic basis of phenazine biosynthesis. Further GC-MS analysis of Nocardiopsis sp. revealed the presence of various compounds including Phenol, 2,4-bis (1,1-dimethylethyl) and trans cinnamic acid which can have significant role in the observed result. The current study is the first report on endophytic Nocardiopsis sp. from ginger with promising applications. In vivo treatment of Nocardiopsis sp. on ginger rhizome has revealed its inhibition towards the colonization of P. myriotylum which makes the study to have promises to manage the severe diseases in ginger like rhizome rot.
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Kim CR, Choi SJ, Kim JK, Park CK, Gim MC, Kim YJ, Park GG, Shin DH. 2,4-Bis(1,1-dimethylethyl)phenol from Cinnamomum loureirii Improves Cognitive Deficit, Cholinergic Dysfunction, and Oxidative Damage in TMT-Treated Mice. Biol Pharm Bull 2017; 40:932-935. [DOI: 10.1248/bpb.b16-00997] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Cho Rong Kim
- Department of Food and Biotechnology, Korea University
| | | | - Jae Kyeom Kim
- School of Human Environmental Sciences, University of Arkansas
| | - Chan Kyu Park
- Department of Food and Biotechnology, Korea University
| | - Min Chul Gim
- Department of Food and Biotechnology, Korea University
| | | | - Gwi Gun Park
- Department of Food Science and Biotechnology, Gachon University
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Viszwapriya D, Prithika U, Deebika S, Balamurugan K, Pandian SK. In vitro and in vivo antibiofilm potential of 2,4-Di- tert -butylphenol from seaweed surface associated bacterium Bacillus subtilis against group A streptococcus. Microbiol Res 2016; 191:19-31. [DOI: 10.1016/j.micres.2016.05.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 04/11/2016] [Accepted: 05/20/2016] [Indexed: 02/08/2023]
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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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Sherma J. Review of advances in the thin layer chromatography of pesticides: 2012-2014. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2015; 50:301-316. [PMID: 25826098 DOI: 10.1080/03601234.2015.1000163] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Publications reporting techniques and applications of thin layer chromatography (planar chromatography) for the separation, detection, qualitative, and quantitative determination, and preparative isolation of pesticides and their metabolites are reviewed for the period from November 1, 2012 to November 1, 2014. Analyses are described for a variety of sample types and pesticide classes. In addition to references on residue analysis, studies such as pesticide structure - retention relationships, identification and characterization of natural and synthesized pesticides, metabolism, bioactivity, degradation, soil mobility, and lipophilicity are covered.
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Affiliation(s)
- Joseph Sherma
- a Department of Chemistry , Lafayette College , Easton , Pennsylvania , USA
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Das P, Dileepkumar R, Anaswara Krishnan S, Nair AS, Dhar PK, Oommen OV. Decahydroquinolines from the venom of a formicinae ant, Oecophylla smaragdina. Toxicon 2014; 92:50-3. [PMID: 25286394 DOI: 10.1016/j.toxicon.2014.09.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 09/17/2014] [Accepted: 09/25/2014] [Indexed: 10/24/2022]
Abstract
Ecologically significant species in controlling pests, Oecophylla smaragdina uses its venom to paralyze their prey and to communicate with their colony mates. But no significant analysis of the ant's venom gland secretions has been carried out hitherto. This study describes the identification of venom constituents of Oecophylla smaragdina using coupled gas chromatography and mass spectroscopy (GC-MS) analysis. The results indicate the anticipated presence of a neurotoxin i.e., 2, 5 dipropyl decahydroquinoline and phenol, 2, 4-bis (1, 1 dimethylethyl). This is the first report on presence of decahydroquinolines in the venom of formicinae ant species of genera Oecophylla.
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Affiliation(s)
- Priya Das
- Department of Computational Biology & Bioinformatics, University of Kerala, Thiruvananthapuram, 695581, Kerala, India.
| | - R Dileepkumar
- Centre for Venom Informatics, University of Kerala, Thiruvananthapuram, 695581, Kerala, India
| | - S Anaswara Krishnan
- Department of Zoology, University of Kerala, Thiruvananthapuram, 695581, Kerala, India
| | - Achuthsankar S Nair
- Department of Computational Biology & Bioinformatics, University of Kerala, Thiruvananthapuram, 695581, Kerala, India
| | - Pawan K Dhar
- Centre for Systems & Synthetic Biology, University of Kerala, Thiruvananthapuram, 695581, Kerala, India; Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, Greater Noida, 201314, Uttar Pradesh, India
| | - Oommen V Oommen
- Department of Computational Biology & Bioinformatics, University of Kerala, Thiruvananthapuram, 695581, Kerala, India; Kerala State Biodiversity Board, Thiruvananthapuram, 695011, Kerala, India
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Padmavathi AR, Abinaya B, Pandian SK. Phenol, 2,4-bis(1,1-dimethylethyl) of marine bacterial origin inhibits quorum sensing mediated biofilm formation in the uropathogen Serratia marcescens. BIOFOULING 2014; 30:1111-22. [PMID: 25377484 DOI: 10.1080/08927014.2014.972386] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Intercellular communication in bacteria (quorum sensing, QS) is an important phenomenon in disease dissemination and pathogenesis, which controls biofilm formation also. This study reports the anti-QS and anti-biofilm efficacy of seaweed Gracilaria gracilis associated Vibrio alginolyticus G16 against Serratia marcescens. Purification and mass spectrometric analysis revealed the active principle as phenol, 2,4-bis(1,1-dimethylethyl) [PD]. PD affected the QS regulated virulence factor production in S. marcescens and resulted in a significant (p < 0.05) reduction in biofilm (85%), protease (41.9%), haemolysin (69.9%), lipase (84.3%), prodigiosin (84.5%) and extracellular polysaccharide (84.62%) secretion without hampering growth, as evidenced by XTT [2,3-bis (2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide] assay. qPCR analysis confirmed the down-regulation of the fimA, fimC, flhD and bsmA genes involved in biofilm formation. Apart from biofilm inhibition and disruption, PD increased the susceptibility of S. marcescens to gentamicin when administered synergistically, which opens another avenue for combinatorial therapy where PD can be used to enhance the efficacy of conventional antibiotics.
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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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