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Mandodan S, Gangmei K, Vijayakumar A, Kunnikuruvan A, Lukose J, Padmanaban H, Bora B, Ashokkumar M, Irudayaraj G, Subbiah P. Molecular identification and GC-MS analysis of a newly isolated novel bacterium (Lysinibacillus sp. VCRC B655) for mosquito control. Mol Biol Rep 2024; 51:800. [PMID: 39001994 DOI: 10.1007/s11033-024-09734-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 06/17/2024] [Indexed: 07/15/2024]
Abstract
BACKGROUND Mosquitoes are widespread globally and have contributed to transmitting pathogens to humans and the burden of vector-borne diseases. They are effectively controlled at their larval stages by biocontrol agents. Unravelling natural sources for microbial agents can lead us to novel potential candidates for managing mosquito-borne diseases. In the present study, an attempt was made to isolate a novel bacterium from the field-collected agricultural soil for larvicidal activity and promising bacterial metabolites for human healthcare. METHODS AND RESULTS Field-collected soil samples from the Union territory of Puducherry, India, have been used as the source of bacteria. Isolate VCRC B655 belonging to the genus Lysinibacillus was identified by 16S rRNA gene sequencing and exhibited promising larvicidal activity against different mosquito species, including Culex (Cx.) quinquefasciatus, Anopheles (An.) stephensi, and Aedes (Ae.) aegypti. The lethal concentration (LC) of Lysinibacillus sp. VCRCB655 was observed to be high for Cx. quiquefasciatus: LC50 at 0.047 mg/l, LC90 at 0.086 mg/l, followed by An. stephensi and Ae. aegypti (LC50: 0.6952 mg/l and 0.795 mg/l) respectively. Additionally, metabolic profiling of the culture supernatant was carried out through Gas chromatography and Mass spectrophotometry (GC/MS) and identified 15 major secondary metabolites of different metabolic classes. Diketopiperazine (DKPs), notably pyro lo [1, 2-a] pyrazine1, 4-dione, are the abundant compounds reported for antioxidant activity, and an insecticide compound benzeneacetic acid was also identified. CONCLUSIONS A new bacterial isolate, Lysinibacillus sp. VCRC B655 has been identified with significant larvicidal activity against mosquito larvae with no observed in non-target organisms. GC-MS analysis revealed diverse bioactive compounds with substantial biological applications. In conclusion, Lysinibacillus sp. VCRC B655 showed promise as an alternative biocontrol agent for mosquito vector control, with additional biological applications further enhancing its significance.
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Affiliation(s)
- Sahadiya Mandodan
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Kakhuangailiu Gangmei
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Abhisubesh Vijayakumar
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Aneha Kunnikuruvan
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Jibi Lukose
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Hemaladkshmi Padmanaban
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Bhagyashree Bora
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Mathivanan Ashokkumar
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Geetha Irudayaraj
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India
| | - Poopathi Subbiah
- Unit of Microbiology and Immunology (UMI), Department of Health Research (Ministry of Health & Family Welfare, Govt. of India), ICMR-Vector Control Research Centre (VCRC), Medical Complex Indira Nagar, Puducherry, 605006, India.
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Thompson RS, Bowers SJ, Vargas F, Hopkins S, Kelley T, Gonzalez A, Lowry CA, Dorrestein PC, Vitaterna MH, Turek FW, Knight R, Wright KP, Fleshner M. A Prebiotic Diet Containing Galactooligosaccharides and Polydextrose Produces Dynamic and Reproducible Changes in the Gut Microbial Ecosystem in Male Rats. Nutrients 2024; 16:1790. [PMID: 38892722 PMCID: PMC11175065 DOI: 10.3390/nu16111790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/30/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024] Open
Abstract
Despite substantial evidence supporting the efficacy of prebiotics for promoting host health and stress resilience, few experiments present evidence documenting the dynamic changes in microbial ecology and fecal microbially modified metabolites over time. Furthermore, the literature reports a lack of reproducible effects of prebiotics on specific bacteria and bacterial-modified metabolites. The current experiments examined whether consumption of diets enriched in prebiotics (galactooligosaccharides (GOS) and polydextrose (PDX)), compared to a control diet, would consistently impact the gut microbiome and microbially modified bile acids over time and between two research sites. Male Sprague Dawley rats were fed control or prebiotic diets for several weeks, and their gut microbiomes and metabolomes were examined using 16S rRNA gene sequencing and untargeted LC-MS/MS analysis. Dietary prebiotics altered the beta diversity, relative abundance of bacterial genera, and microbially modified bile acids over time. PICRUSt2 analyses identified four inferred functional metabolic pathways modified by the prebiotic diet. Correlational network analyses between inferred metabolic pathways and microbially modified bile acids revealed deoxycholic acid as a potential network hub. All these reported effects were consistent between the two research sites, supporting the conclusion that dietary prebiotics robustly changed the gut microbial ecosystem. Consistent with our previous work demonstrating that GOS/PDX reduces the negative impacts of stressor exposure, we propose that ingesting a diet enriched in prebiotics facilitates the development of a health-promoting gut microbial ecosystem.
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Affiliation(s)
- Robert S. Thompson
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Samuel J. Bowers
- Department of Neurobiology, Northwestern University, Center for Sleep and Circadian Biology, Evanston, IL 60208, USA; (S.J.B.); (M.H.V.); (F.W.T.)
| | - Fernando Vargas
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, San Diego, CA 92093, USA (P.C.D.)
| | - Shelby Hopkins
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Tel Kelley
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
| | - Antonio Gonzalez
- Department of Pediatrics, University of California San Diego, San Diego, CA 92093, USA (R.K.)
| | - Christopher A. Lowry
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Pieter C. Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, San Diego, CA 92093, USA (P.C.D.)
| | - Martha Hotz Vitaterna
- Department of Neurobiology, Northwestern University, Center for Sleep and Circadian Biology, Evanston, IL 60208, USA; (S.J.B.); (M.H.V.); (F.W.T.)
| | - Fred W. Turek
- Department of Neurobiology, Northwestern University, Center for Sleep and Circadian Biology, Evanston, IL 60208, USA; (S.J.B.); (M.H.V.); (F.W.T.)
| | - Rob Knight
- Department of Pediatrics, University of California San Diego, San Diego, CA 92093, USA (R.K.)
- Department of Computer Science and Engineering, University of California San Diego, San Diego, CA 92093, USA
- Center for Microbiome Innovation, University of California San Diego, San Diego, CA 92093, USA
| | - Kenneth P. Wright
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Monika Fleshner
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (R.S.T.); (T.K.); (C.A.L.); (K.P.W.J.)
- Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA
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Flores GAM, Lopez RP, Cerrudo CS, Perotti MA, Consolo VF, Berón CM. Wolbachia dominance influences the Culex quinquefasciatus microbiota. Sci Rep 2023; 13:18980. [PMID: 37923779 PMCID: PMC10624681 DOI: 10.1038/s41598-023-46067-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 10/27/2023] [Indexed: 11/06/2023] Open
Abstract
Microorganisms present in mosquitoes and their interactions are key factors affecting insect development. Among them, Wolbachia is closely associated with the host and affects several fitness parameters. In this study, the bacterial and fungal microbiota from two laboratory Culex quinquefasciatus isolines (wild type and tetracycline-cured) were characterized by metagenome amplicon sequencing of the ITS2 and 16S rRNA genes at different developmental stages and feeding conditions. We identified 572 bacterial and 61 fungal OTUs. Both isolines presented variable bacterial communities and different trends in the distribution of diversity among the groups. The lowest bacterial richness was detected in sugar-fed adults of the cured isoline, whereas fungal richness was highly reduced in blood-fed mosquitoes. Beta diversity analysis indicated that isolines are an important factor in the differentiation of mosquito bacterial communities. Considering composition, Penicillium was the dominant fungal genus, whereas Wolbachia dominance was inversely related to that of Enterobacteria (mainly Thorsellia and Serratia). This study provides a more complete overview of the mosquito microbiome, emphasizing specific highly abundant components that should be considered in microorganism manipulation approaches to control vector-borne diseases.
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Affiliation(s)
- Guillermo A M Flores
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Mar del Plata, Buenos Aires, Argentina
| | - Rocio P Lopez
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Mar del Plata, Buenos Aires, Argentina
| | - Carolina S Cerrudo
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular (LIGBCM), Area Virosis de Insectos (AVI), Departamento Ciencia y Tecnología, Universidad Nacional de Quilmes and CONICET, Bernal, Argentina
| | - M Alejandra Perotti
- Ecology and Evolutionary Biology Section, School of Biological Sciences, University of Reading, Reading, UK
| | - V Fabiana Consolo
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Mar del Plata, Buenos Aires, Argentina.
| | - Corina M Berón
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Fundación Para Investigaciones Biológicas Aplicadas (FIBA), Mar del Plata, Buenos Aires, Argentina.
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