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Espinoza LA, Purriños L, Centeno JA, Carballo J. Chemical, microbial and sensory properties of a chestnut and milk ice cream with improved healthy characteristics. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2020. [DOI: 10.1080/10942912.2020.1856135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Luis A. Espinoza
- Presently at Departamento de Industrias Alimentarias, Universidad Nacional de Frontera, Piura, Perú
- Departamento de Ingeniería Química, Área de Tecnología de Los Alimentos, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
| | - Laura Purriños
- Departamento de Cromatografía, Centro Tecnológico de La Carne de Galicia, Rúa Galicia Nº 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, Ourense, Departamento de Cromatografía, Spain
| | - Juan A. Centeno
- Departamento de Ingeniería Química, Área de Tecnología de Los Alimentos, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
| | - Javier Carballo
- Departamento de Ingeniería Química, Área de Tecnología de Los Alimentos, Facultad de Ciencias, Universidad de Vigo, Ourense, Spain
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Loulier J, Lefort F, Stocki M, Asztemborska M, Szmigielski R, Siwek K, Grzywacz T, Hsiang T, Ślusarski S, Oszako T, Klisz M, Tarakowski R, Nowakowska JA. Detection of Fungi and Oomycetes by Volatiles Using E-Nose and SPME-GC/MS Platforms. Molecules 2020; 25:E5749. [PMID: 33291490 PMCID: PMC7730677 DOI: 10.3390/molecules25235749] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 01/18/2023] Open
Abstract
Fungi and oomycetes release volatiles into their environment which could be used for olfactory detection and identification of these organisms by electronic-nose (e-nose). The aim of this study was to survey volatile compound emission using an e-nose device and to identify released molecules through solid phase microextraction-gas chromatography/mass spectrometry (SPME-GC/MS) analysis to ultimately develop a detection system for fungi and fungi-like organisms. To this end, cultures of eight fungi (Armillaria gallica, Armillaria ostoyae, Fusarium avenaceum, Fusarium culmorum, Fusarium oxysporum, Fusarium poae, Rhizoctonia solani, Trichoderma asperellum) and four oomycetes (Phytophthora cactorum, P. cinnamomi, P. plurivora, P. ramorum) were tested with the e-nose system and investigated by means of SPME-GC/MS. Strains of F. poae, R. solani and T. asperellum appeared to be the most odoriferous. All investigated fungal species (except R. solani) produced sesquiterpenes in variable amounts, in contrast to the tested oomycetes strains. Other molecules such as aliphatic hydrocarbons, alcohols, aldehydes, esters and benzene derivatives were found in all samples. The results suggested that the major differences between respective VOC emission ranges of the tested species lie in sesquiterpene production, with fungi emitting some while oomycetes released none or smaller amounts of such molecules. Our e-nose system could discriminate between the odors emitted by P. ramorum, F. poae, T. asperellum and R. solani, which accounted for over 88% of the PCA variance. These preliminary results of fungal and oomycete detection make the e-nose device suitable for further sensor design as a potential tool for forest managers, other plant managers, as well as regulatory agencies such as quarantine services.
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Affiliation(s)
- Jérémie Loulier
- InTNE (Plants & Pathogens Group), Hepia, University of Applied Sciences and Arts of Western Switzerland, 150 route de Presinge, 1254 Jussy, Switzerland;
| | - François Lefort
- InTNE (Plants & Pathogens Group), Hepia, University of Applied Sciences and Arts of Western Switzerland, 150 route de Presinge, 1254 Jussy, Switzerland;
| | - Marcin Stocki
- Institute of Forest Sciences, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland; (M.S.); (T.O.)
| | - Monika Asztemborska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.A.); (R.S.)
| | - Rafał Szmigielski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (M.A.); (R.S.)
| | - Krzysztof Siwek
- Faculty of Electrical Engineering, Warsaw University of Technology, Koszykowa 75, 00-661 Warsaw, Poland; (K.S.); (T.G.)
| | - Tomasz Grzywacz
- Faculty of Electrical Engineering, Warsaw University of Technology, Koszykowa 75, 00-661 Warsaw, Poland; (K.S.); (T.G.)
| | - Tom Hsiang
- Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada;
| | - Sławomir Ślusarski
- Forest Protection Department, Forest Research Institute, Braci Leśnej 3, 05-090 Sękocin Stary, Poland;
| | - Tomasz Oszako
- Institute of Forest Sciences, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland; (M.S.); (T.O.)
- Forest Protection Department, Forest Research Institute, Braci Leśnej 3, 05-090 Sękocin Stary, Poland;
| | - Marcin Klisz
- Department of Silviculture and Genetics, Forest Research Institute, Braci Leśnej 3, 05-090 Sękocin Stary, Poland;
| | - Rafał Tarakowski
- Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland;
| | - Justyna Anna Nowakowska
- Institute of Biological Sciences, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3 Street, 01-938 Warsaw, Poland
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Mollah MMI, Dekebo A, Kim Y. Immunosuppressive Activities of Novel PLA 2 Inhibitors from Xenorhabdus hominickii, an Entomopathogenic Bacterium. INSECTS 2020; 11:E505. [PMID: 32759864 PMCID: PMC7469199 DOI: 10.3390/insects11080505] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/03/2020] [Accepted: 08/03/2020] [Indexed: 01/27/2023]
Abstract
Eicosanoids mediate both cellular and humoral immune responses in insects. Phospholipase A2 (PLA2) catalyzes the first committed step in eicosanoid biosynthesis. It is a common pathogenic target of two entomopathogenic bacteria, Xenorhabdus and Photorhabdus. The objective of this study was to identify novel PLA2 inhibitors from X. hominickii and determine their immunosuppressive activities. To identify novel PLA2 inhibitors, stepwise fractionation of X. hominickii culture broth and subsequent enzyme assays were performed. Eight purified fractions of bacterial metabolites were obtained. Gas chromatography and mass spectrometry (GC-MS) analysis predicted that the main components in these eight fractions were 2-cyanobenzoic acid, dibutylamine, 2-ethyl 1-hexanol, phthalimide (PM), dioctyl terephthalate, docosane, bis (2-ethylhexyl) phthalate, and 3-ethoxy-4-methoxyphenol (EMP). Their synthetic compounds inhibited the activity of PLA2 in hemocytes of a lepidopteran insect, Spodoptera exigua, in a dose-dependent manner. They also showed significant inhibitory activities against immune responses such as prophenoloxidase activation and hemocytic nodulation of S. exigua larvae, with PM and EMP exhibiting the most potent inhibitory activities. These immunosuppressive activities were specific through PLA2 inhibition because an addition of arachidonic acid, a catalytic product of PLA2, significantly rescued such suppressed immune responses. The two most potent compounds (PM and EMP) showed significant insecticidal activities after oral administration. When the compounds were mixed with Bacillus thuringiensis (Bt), they markedly increased Bt pathogenicity. This study identified eight PLA2 inhibitors from bacterial metabolites of X. hominickii and demonstrated their potential as novel insecticides.
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Affiliation(s)
- Md. Mahi Imam Mollah
- Department of Plant Medicals, College of Natural Sciences, Andong National University, Andong 36729, Korea;
| | - Aman Dekebo
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888 Adama, Ethiopia;
| | - Yonggyun Kim
- Department of Plant Medicals, College of Natural Sciences, Andong National University, Andong 36729, Korea;
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Gabriëls D, Hernández WY, Sels B, Van Der Voort P, Verberckmoes A. Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00359h] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review deals with homogeneous and heterogeneous catalytic processes for the Guerbet condensation, as well as discusses biomass sources, thermodynamics and technological considerations.
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Affiliation(s)
- Dries Gabriëls
- Center for Surface Chemistry and Catalysis (COK)
- KU Leuven
- Belgium
| | - Willinton Yesid Hernández
- Center for Ordered Materials, Organometallics & Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Bert Sels
- Center for Surface Chemistry and Catalysis (COK)
- KU Leuven
- Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics & Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - An Verberckmoes
- Industrial Catalysis and Adsorption Technology (INCAT)
- Department of Industrial Technology and Construction
- Faculty of Engineering & Architecture
- Ghent University
- 9000 Ghent
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Olbrycht M, Balawejder M, Matuła K, Piatkowski W, Antos D. Multistage Cross-Current and Countercurrent Flow Crystallization for Separation of Racemic 2-Methylbutanoic Acid. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501703w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maksymilian Olbrycht
- Department
of Chemical and Process Engineering, Rzeszow University of Technology, 35-959 Rzeszow, Poland
| | - Maciej Balawejder
- Chair
of Chemistry and Food Toxicology, University of Rzeszow, 35-959 Rzeszow, Poland
| | - Kinga Matuła
- Institute
of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Wojciech Piatkowski
- Department
of Chemical and Process Engineering, Rzeszow University of Technology, 35-959 Rzeszow, Poland
| | - Dorota Antos
- Department
of Chemical and Process Engineering, Rzeszow University of Technology, 35-959 Rzeszow, Poland
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Brenna E, Fuganti C, Gatti FG, Serra S. Biocatalytic Methods for the Synthesis of Enantioenriched Odor Active Compounds. Chem Rev 2011; 111:4036-72. [DOI: 10.1021/cr100289r] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Elisabetta Brenna
- Politecnico di Milano, Dipartimento di Chimica, Materiali, Ingegneria Chimica, Via Mancinelli 7, I-20131 Milano, Italy
| | - Claudio Fuganti
- Politecnico di Milano, Dipartimento di Chimica, Materiali, Ingegneria Chimica, Via Mancinelli 7, I-20131 Milano, Italy
| | - Francesco G. Gatti
- Politecnico di Milano, Dipartimento di Chimica, Materiali, Ingegneria Chimica, Via Mancinelli 7, I-20131 Milano, Italy
| | - Stefano Serra
- Istituto di Chimica del Riconoscimento Molecolare—CNR, Via Mancinelli 7, I-20131 Milano, Italy
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Ćiško-Anić B, Hameršak Z. Desymmetrization of cyclic anhydrides mediated by cinchona alkaloids: Synthesis and olfactory properties of new fragrances based on (R)- and (S)-2-ethylhexanol. Chirality 2009; 21:894-904. [DOI: 10.1002/chir.20684] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Microbial resolution of 2-methylbutyric acid and its application to several chiral flavour compounds. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s0167-4501(06)80023-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Shen CC, Syu WJ, Li SY, Lin CH, Lee GH, Sun CM. Antimicrobial activities of naphthazarins from Arnebia euchroma. JOURNAL OF NATURAL PRODUCTS 2002; 65:1857-1862. [PMID: 12502328 DOI: 10.1021/np010599w] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bioassay-directed fractionation of extract of Arnebia euchroma led to the isolation of alkannin (1), shikonin (2), and their derivatives (3-8) as the active principles against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE). The stereochemistry of alpha-methylbutyryl alkannin (8) is revealed for the first time, and the antimicrobial activity of 8 was compared with its corresponding diastereomer (9). The derivatives 3-9 showed stronger anti-MRSA activity [minimum inhibitory concentrations (MICs) ranged from 1.56 to 3.13 microg/mL] than alkannin or shikonin (MIC = 6.25 microg/mL). Anti-MRSA activity of derivatives was bactericidal with minimum bactericidal concentration (MBC)/MIC < or = 2. In a time-kill assay, the bactericidal activity against MRSA was achieved as rapidly as 2 h. The derivatives 3-9 were also active against vancomycin-resistant Enterococcus faecium (F935) and vancomycin-resistant Enterococcus faecalis (CKU-17) with MICs similar to those with MRSA. Aromatic ester derivatives were also synthesized for antimicrobial activity comparison. None of these compounds were active against Gram-negative bacteria tested. Their cytotoxicity was also evaluated on selected cancer cell lines, and they expressed their activity in the range 0.6-5.4 microg/mL (CD(50)). Our results indicate that the ester derivatives of alkannin are potential candidates of anti-MRSA and anti-VRE agents with antitumor activity.
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Affiliation(s)
- Chien-Chang Shen
- National Research Institute of Chinese Medicine, Taipei 112, Taiwan
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Dixon RW, Radmer RJ, Kuhn B, Kollman PA, Yang J, Raposo C, Wilcox CS, Klumb LA, Stayton PS, Behnke C, Le Trong I, Stenkamp R. Theoretical and experimental studies of biotin analogues that bind almost as tightly to streptavidin as biotin. J Org Chem 2002; 67:1827-37. [PMID: 11895399 DOI: 10.1021/jo991846s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have used a newly developed qualitative computational approach, PROFEC (Pictorial Representation of Free Energy Changes), to visualize the areas of the ligand biotin where modifications of its structure might lead to tighter binding to the protein streptavidin. The PROFEC analysis, which includes protein flexibility and ligand solvation/desolvation, led to the suggestion that the pro-9R hydrogen atom of biotin, which is in alpha-position to the CO(2)(-) group, might be changed to a larger group and lead to better binding with streptavidin and avidin. Free energy calculations supported this suggestion and predicted that the methyl analogue should bind approximately 3 kcal/mol more tightly to streptavidin, with this difference coming exclusively from the relative desolvation free energy of the ligand. The PROFEC analysis further suggested little or no improvement for changing the pro-9S hydrogen atom to a methyl group, and great reduction in changing the ureido N-H groups to N-CH(3). Stimulated by these results, we synthesized 9R-methylbiotin and 9S-methylbiotin, and their binding free energies and enthalpies were measured for interaction with streptavidin and avidin, respectively. In contrast to the calculated results, experiments found both 9-methylbiotin isomers to bind more weakly to streptavidin than biotin. The calculated preference for the binding of the 9R- over the 9S-stereoisomer was observed. In addition, 9-methylbiotin is considerably less soluble in water than biotin, as predicted by the calculation, and the 9R isomer is, to our knowledge, thus far the tightest binding analogue of biotin to streptavidin. Subsequently, X-ray structures of the complexes between streptavidin and both 9R- and 9S-methylbiotin were determined, and the structures were consistent with those used in the free energy calculations. Thus, the reason for the discrepancy between the calculated and experimental binding free energy does not lie in unusual binding modes for the 9-methylbiotins.
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Affiliation(s)
- Richard W Dixon
- Department of Pharmaceutical Chemistry, University of California, San Francisco 94143, USA.
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Structures of Cribochalines A and B, Branched-Chain Methoxylaminoalkyl Pyridines from the Micronesian Sponge, Cribochalina sp. Absolute Configuration and Enantiomeric Purity of Related O-Methyl Oximes. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00189-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Non-thiazolidinedione antihyperglycaemic agents. Part 4: Synthesis of (±)-, (R)-(+)- and (S)-(−)-enantiomers of 2-oxy-3-arylpropanoic acids. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(99)00104-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Binzak B, Willard J, Vockley J. Identification of the catalytic residue of human short/branched chain acyl-CoA dehydrogenase by in vitro mutagenesis. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1382:137-42. [PMID: 9507094 DOI: 10.1016/s0167-4838(97)00161-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The acyl-CoA dehydrogenases (ACDs) are a family of related enzymes which catalyze the alpha,beta-dehydrogenation of acyl-CoA esters, transferring electrons to electron transferring flavoprotein. We have recently cloned and characterized the cDNA for human short/branched chain acyl-CoA dehydrogenase (SBCAD). Based on homology with the other ACDs we hypothesized that E381 is the catalytic residue for this enzyme. Alteration of this amino acid to glutamine, glycine or arginine resulted in an inactive enzyme. Substitution of aspartate at this position led to an enzyme with reduced activity compared to the wild type. An E381G/G260E double mutation (which places a glutamate in a position homologous to the catalytic residue identified in other members of this gene family) restored enzyme activity. These data confirm the crucial nature of E381 to the activity of this enzyme and strongly support its role as the alpha-proton abstracting base.
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Affiliation(s)
- B Binzak
- Department of Medical Genetics, Mayo Clinic, Rochester, MN 55905, USA
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Svatoš A, Huňková Z, Křen V, Hoskovec M, Šaman D, Valterová I, Vrkoč J, Koutek B. Biotransformations of γ-methyl-β-ketosulfones: stereoselectivity of 3-methyl-1-(phenylsulfonyl)hexan-2-one reductions by various yeasts. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0957-4166(96)00145-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Resolution of 2-methylalkanoic esters: Enantioselective aminolysis by (R)-1-phenylethylamine of ethyl 2-methyloctanoate catalysed by lipase B from Candida antarctica. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0957-4166(96)00170-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Cho CG, Lansbury PT. Synthesis of Two Bicyclic Surfactants Which Form Reversed Micelles Capable of Selective Protein Extraction. J Org Chem 1996. [DOI: 10.1021/jo9600518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheon-Gyu Cho
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Peter T. Lansbury
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Mosandl A. Enantioselective capillary gas chromatography and stable isotope ratio mass spectrometry in the authenticity control of flavors and essential oils. FOOD REVIEWS INTERNATIONAL 1995. [DOI: 10.1080/87559129509541063] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Asymmetric protonation of photodienols enantioselective synthesis of (R)-2-methyl alkanols. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0957-4166(95)00080-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Karl V, Kaunzinger A, Gutser J, Steuer P, Angles-Angel J, Mosandl A. Stereoisomeric flavour compounds LXVII. 2-, 3-, and 4-Alkyl-branched acids, part 1: General approach to the synthesis of the enantiopure acids. Chirality 1994. [DOI: 10.1002/chir.530060510] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Larpent C, Chasseray X. Optically active surfactants - I - the first synthesis and properties of sodium bis [(S)] ethyl-2-hexyl] sulfosuccinates (“aerosal ot”). Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)88470-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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