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Kumar M, Khushi K, Bhardwaj A, Deb DK, Singh N, Elahi D, Sharma S, Bajpai G, Srivastava A. In-vitro Study for Ibuprofen Encapsulation, Controlled Release and Cytotoxicity Improvement using Excipient-Drugs Mixed Micelle. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kumar M, Elahi D, Bhardwaj A, Sharma S, Khushi K, Singh E, Singh N, Srivastava A. Physiochemical Investigation of the Excipients Mixed Micelles for improvement of Encapsulation and Controlled Release of Antihistamine Drugs. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Heuson E, Etchegaray A, Filipe SL, Beretta D, Chevalier M, Phalip V, Coutte F. Screening of Lipopeptide-Producing Strains of Bacillus sp. Using a New Automated and Sensitive Fluorescence Detection Method. Biotechnol J 2018; 14:e1800314. [PMID: 30430761 DOI: 10.1002/biot.201800314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 10/27/2018] [Indexed: 01/29/2023]
Abstract
Lipopeptides, such as surfactins are important biosurfactants produced by Bacillus sp. that find applications in many areas (environment, medicine, and food industries). Giving their importance, the use of simple detection methods will facilitate screening and quantification. In the present work, the authors describe a completely automated workflow for the screening of lipopeptide-producing strains, including quantification. First, isolated colonies from environmental samples are automatically picked and inoculated in 96 wells growth plate. After overnight incubation, surfactin produced in the broth is quantified, using a new sensitive fluorescent method. The method uses fluorescein (FL), which is an anionic dye at neutral to alkaline pH and forms a stable complex with the cationic surfactant cetylpiridinium chloride (CPC), quenching fluorescence. Upon addition of surfactin or other lipopeptides, fluorescein is released from the CPC-FL complex and quantified. The robustness of this method is assessed by comparing the quantification results to those conventionally measured by RP-UPLC and the results of strain screening are confirmed by MALDI-ToF analysis. The authors report for the first time the successful application of this analytical method for high-throughput screening of novel lipopeptide-producing strains.
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Affiliation(s)
- Egon Heuson
- University Lille, INRA, ISA, University Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, F-59000, Lille, France
| | - Augusto Etchegaray
- Faculty of Chemistry, Pontifical Catholic University of Campinas, Rod. D. Pedro I, km 136, Campinas, SP, 13086-900, Brazil
| | - Stephanie L Filipe
- University Lille, INRA, ISA, University Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, F-59000, Lille, France
| | - Daniel Beretta
- Faculty of Chemistry, Pontifical Catholic University of Campinas, Rod. D. Pedro I, km 136, Campinas, SP, 13086-900, Brazil
| | - Mickaël Chevalier
- University Lille, INRA, ISA, University Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, F-59000, Lille, France
| | - Vincent Phalip
- University Lille, INRA, ISA, University Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, F-59000, Lille, France
| | - François Coutte
- University Lille, INRA, ISA, University Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV Institut Charles Viollette, F-59000, Lille, France
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