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Sharma B, Yadav DK. Metabolomics and Network Pharmacology in the Exploration of the Multi-Targeted Therapeutic Approach of Traditional Medicinal Plants. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11233243. [PMID: 36501282 PMCID: PMC9737206 DOI: 10.3390/plants11233243] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 05/20/2023]
Abstract
Metabolomic is generally characterized as a comprehensive and the most copious analytical technique for the identification of targeted and untargeted metabolite diversity in a biological system. Recently, it has exponentially been used for phytochemical analysis and variability among plant metabolites, followed by chemometric analysis. Network pharmacology analysis is a computational technique used for the determination of multi-mechanistic and therapeutic evaluation of chemicals via interaction with the genomes involved in targeted or untargeted diseases. In considering the facts, the present review aims to explore the role of metabolomics and network pharmacology in the scientific validation of therapeutic claims as well as to evaluate the multi-targeted therapeutic approach of traditional Indian medicinal plants. The data was collected from different electronic scientific databases such as Google Scholar, Science Direct, ACS publication, PubMed, Springer, etc., using different keywords such as metabolomics, techniques used in metabolomics, chemometric analysis, a bioinformatic tool for drug discovery and development, network pharmacology, methodology and its role in biological evaluation of chemicals, etc. The screened articles were gathered and evaluated by different experts for their exclusion and inclusion in the final draft of the manuscript. The review findings suggest that metabolomics is one of the recent most precious and effective techniques for metabolite identification in the plant matrix. Various chemometric techniques are copiously used for metabolites discrimination analysis hence validating the unique characteristic of herbal medicines and their derived products concerning their authenticity. Network pharmacology remains the only option for the unique and effective analysis of hundreds of chemicals or metabolites via genomic interaction and thus validating the multi-mechanistic and therapeutic approach to explore the pharmacological aspects of herbal medicines for the management of the disease.
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Affiliation(s)
- Bharti Sharma
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John’s University, Queens, New York, NY 11439, USA
| | - Dinesh Kumar Yadav
- Department of Pharmacognosy, SGT College of Pharmacy, SGT University, Gurugram 122505, Haryana, India
- Correspondence: ; Tel.: +91-7042348251
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Carreño-Campos C, Arevalo-Villalobos JI, Villarreal ML, Ortiz-Caltempa A, Rosales-Mendoza S. Establishment of the Carrot-Made LTB-Syn Antigen Cell Line in Shake Flask and Airlift Bioreactor Cultures. PLANTA MEDICA 2022; 88:1060-1068. [PMID: 34918307 DOI: 10.1055/a-1677-4135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Carrot (Daucus carota) cells have been used to effectively manufacture recombinant biopharmaceuticals such as cytokines, vaccines, and antibodies. We generated the carrot cell line Z4, genetically modified to produce the LTB-Syn antigen, which is a fusion protein proposed for immunotherapy against synucleinopathies. In this work, the Z4 cell suspension line was cultivated to produce the LTB-Syn protein in a 250 mL shake flask and 2 L airlift bioreactor cultures grown for 45 and 30 days, respectively. Maximum biomass was obtained on day 15 in both the airlift bioreactor (35.00 ± 0.04 g/L DW) and shake flasks (17.00 ± 0.04 g/L DW). In the bioreactor, the highest LTB-Syn protein yield (1.52 ± 0.03 µg/g FW) was obtained on day 15; while the same occurred on day 18 for shake flasks (0.92 ± 0.02 µg/g FW). LTB-Syn protein levels were analyzed by GM1-ELISA and western blot. PCR analysis confirmed the presence of the transgene in the Z4 line. The obtained data demonstrate that the carrot Z4 cell suspension line grown in airlift bioreactors shows promise for a scale-up cultivation producing an oral LTB-Syn antigen.
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Affiliation(s)
- Christian Carreño-Campos
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | | | - María Luisa Villarreal
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Anabel Ortiz-Caltempa
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Sergio Rosales-Mendoza
- Laboratorio de Biofarmacéuticos Recombinantes, Universidad Autónoma de San Luis Potosí, SLP, México
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Aldawsari MF, Khafagy ES, Saqr AA, Alalaiwe A, Abbas HA, Shaldam MA, Hegazy WAH, Goda RM. Tackling Virulence of Pseudomonas aeruginosa by the Natural Furanone Sotolon. Antibiotics (Basel) 2021; 10:antibiotics10070871. [PMID: 34356792 PMCID: PMC8300740 DOI: 10.3390/antibiotics10070871] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 02/07/2023] Open
Abstract
The bacterial resistance development due to the incessant administration of antibiotics has led to difficulty in their treatment. Natural adjuvant compounds can be co-administered to hinder the pathogenesis of resistant bacteria. Sotolon is the prevailing aromatic compound that gives fenugreek its typical smell. In the current work, the anti-virulence activities of sotolon on Pseudomonas aeruginosa have been evaluated. P. aeruginosa has been treated with sotolon at sub-minimum inhibitory concentration (MIC), and production of biofilm and other virulence factors were assessed. Moreover, the anti-quorum sensing (QS) activity of sotolon was in-silico evaluated by evaluating the affinity of sotolon to bind to QS receptors, and the expression of QS genes was measured in the presence of sotolon sub-MIC. Furthermore, the sotolon in-vivo capability to protect mice against P. aeruginosa was assessed. Significantly, sotolon decreased the production of bacterial biofilm and virulence factors, the expression of QS genes, and protected mice from P. aeruginosa. Conclusively, the plant natural substance sotolon attenuated the pathogenicity of P. aeruginosa, locating it as a plausible potential therapeutic agent for the treatment of its infections. Sotolon can be used in the treatment of bacterial infections as an alternative or adjuvant to antibiotics to combat their high resistance to antibiotics.
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Affiliation(s)
- Mohammed F. Aldawsari
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-kharj 11942, Saudi Arabia; (M.F.A.); (A.A.S.); (A.A.)
| | - El-Sayed Khafagy
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-kharj 11942, Saudi Arabia; (M.F.A.); (A.A.S.); (A.A.)
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
- Correspondence: ; Tel.: +966-533-564-286
| | - Ahmed Al Saqr
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-kharj 11942, Saudi Arabia; (M.F.A.); (A.A.S.); (A.A.)
| | - Ahmed Alalaiwe
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-kharj 11942, Saudi Arabia; (M.F.A.); (A.A.S.); (A.A.)
| | - Hisham A. Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; (H.A.A.); (W.A.H.H.)
| | - Moataz A. Shaldam
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafr El-Sheikh 33511, Egypt;
| | - Wael A. H. Hegazy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; (H.A.A.); (W.A.H.H.)
| | - Reham M. Goda
- Department of Microbiology and Biotechnology, Faculty of Pharmacy, Delta University for Science and Biotechnology, Gamasa 35712, Egypt;
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Garagounis C, Beritza K, Georgopoulou ME, Sonawane P, Haralampidis K, Goossens A, Aharoni A, Papadopoulou KK. A hairy-root transformation protocol for Trigonella foenum-graecum L. as a tool for metabolic engineering and specialised metabolite pathway elucidation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 154:451-462. [PMID: 32659648 DOI: 10.1016/j.plaphy.2020.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
The development of genetic transformation methods is critical for enabling the thorough characterization of an organism and is a key step in exploiting any species as a platform for synthetic biology and metabolic engineering approaches. In this work we describe the development of an Agrobacterium rhizogenes-mediated hairy root transformation protocol for the crop and medicinal legume fenugreek (Trigonella foenum-graecum). Fenugreek has a rich and diverse content in bioactive specialised metabolites, notably diosgenin, which is a common precursor for synthetic human hormone production. This makes fenugreek a prime target for identification and engineering of specific biosynthetic pathways for the production of triterpene and steroidal saponins, phenolics, and galactomanans. Through this transformation protocol, we identified a suitable promoter for robust transgene expression in fenugreek. Finally, we establish the proof of principle for the utility of the fenugreek system for metabolic engineering programs, by heterologous expression of known triterpene saponin biosynthesis regulators from the related legume Medicago truncatula in fenugreek hairy roots.
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Affiliation(s)
- Constantine Garagounis
- Department of Biochemistry and Biotechnology, Laboratory of Plant and Environmental Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece.
| | - Konstantina Beritza
- Department of Biochemistry and Biotechnology, Laboratory of Plant and Environmental Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
| | - Maria-Eleni Georgopoulou
- Department of Biochemistry and Biotechnology, Laboratory of Plant and Environmental Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
| | - Prashant Sonawane
- Faculty of Biochemistry, Department of Plant Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Kosmas Haralampidis
- Faculty of Botany, Department of Biology, National and Kapodistrian University of Athens, 15701, Athens, Greece
| | - Alain Goossens
- Ghent University, Department of Plant Biotechnology and Bioinformatics, 9052, Ghent, Belgium; VIB-UGent Center for Plant Systems Biology, 9052, Ghent, Belgium
| | - Asaph Aharoni
- Faculty of Biochemistry, Department of Plant Sciences, Weizmann Institute of Science, 7610001, Rehovot, Israel
| | - Kalliope K Papadopoulou
- Department of Biochemistry and Biotechnology, Laboratory of Plant and Environmental Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
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Thakore D, Srivastava AK, Sinha AK. Mass production of Ajmalicine by bioreactor cultivation of hairy roots of Catharanthus roseus. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.12.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Verma PC, Singh H, Negi AS, Saxena G, Rahman LU, Banerjee S. Yield enhancement strategies for the production of picroliv from hairy root culture of Picrorhiza kurroa Royle ex Benth. PLANT SIGNALING & BEHAVIOR 2015; 10:e1023976. [PMID: 26039483 PMCID: PMC4622709 DOI: 10.1080/15592324.2015.1023976] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 02/19/2015] [Accepted: 02/20/2015] [Indexed: 05/27/2023]
Abstract
Fast-growing hairy root cultures of Picrorhiza kurroa induced by Agrobacterium rhizogenes offers a potential production system for iridoid glycosides. In present study we have investigated the effects of various nutrient medium formulations viz B5, MS, WP and NN, and sucrose concentrations (1-8%) on the biomass and glycoside production of selected clone (14-P) of P. kurroa hairy root. Full strength B5 medium was found to be most suitable for maximum biomass yield on the 40th day of culture (GI = 32.72 ± 0.44) followed by the NN medium of the same strength (GI = 22.9 ± 0.43). Secondary metabolite production was 1.1 and 1.3 times higher in half strength B5 medium respectively in comparison to MS medium. Maximum biomass accumulation along with the maximum picroliv content was achieved with 4% sucrose concentration in basal medium. RT vitamin and Thiamine-HCl effected the growth and secondary metabolite production of hairy roots growing on MS medium but did not show any effect on other media. The pH of the medium played significant role in growth and secondary metabolite production and was found to be highest at pH 6.0 while lowest at pH 3.0 and pH 8.0. To enhance the production of biomass and Picroliv 5 liter working capacity bioreactor was used, 27-fold (324 g FW) higher growth was observed in bioreactor than shake flask and secondary metabolite production was similarly enhanced.
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Affiliation(s)
- Praveen Chandra Verma
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP, India
| | - Harpal Singh
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP, India
| | - Arvind Singh Negi
- CSIR-Central Institute of Medicinal and Aromatic Plants; Council of Scientific and Industrial Research; Kukrail Picnic Spot Road; Lucknow, UP, India
| | - Gauri Saxena
- Department of Botany; University of Lucknow; Lucknow, UP, India
| | - Laiq-ur Rahman
- CSIR-Central Institute of Medicinal and Aromatic Plants; Council of Scientific and Industrial Research; Kukrail Picnic Spot Road; Lucknow, UP, India
| | - Suchitra Banerjee
- CSIR-Central Institute of Medicinal and Aromatic Plants; Council of Scientific and Industrial Research; Kukrail Picnic Spot Road; Lucknow, UP, India
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López EG, Ramírez EGR, Gúzman OG, Calva GC, Ariza-Castolo A, Pérez-Vargas J, Rodríguez HGM. MALDI-TOF characterization of hGH1 produced by hairy root cultures of Brassica oleracea var. italica grown in an airlift with mesh bioreactor. Biotechnol Prog 2013; 30:161-71. [PMID: 24124083 DOI: 10.1002/btpr.1829] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 09/26/2013] [Indexed: 01/01/2023]
Abstract
Expression systems based on plant cells, tissue, and organ cultures have been investigated as an alternative for production of human therapeutic proteins in bioreactors. In this work, hairy root cultures of Brassica oleracea var. italica (broccoli) were established in an airlift with mesh bioreactor to produce isoform 1 of the human growth hormone (hGH1) as a model therapeutic protein. The hGH1 cDNA was cloned into the pCAMBIA1105.1 binary vector to induce hairy roots in hypocotyls of broccoli plantlets via Agrobacterium rhizogenes. Most of the infected plantlets (90%) developed hairy roots when inoculated before the appearance of true leaves, and keeping the emerging roots attached to hypocotyl explants during transfer to solid Schenk and Hildebrandt medium. The incorporation of the cDNA into the hairy root genome was confirmed by PCR amplification from genomic DNA. The expression and structure of the transgenic hGH1 was assessed by ELISA, western blot, and MALDITOF-MS analysis of the purified protein extracted from the biomass of hairy roots cultivated in bioreactor for 24 days. Production of hGH1 was 5.1 ± 0.42 µg/g dry weight (DW) for flask cultures, and 7.8 ± 0.3 µg/g DW for bioreactor, with productivity of 0.68 ± 0.05 and 1.5 ± 0.06 µg/g DW*days, respectively, indicating that the production of hGH1 was not affected by the growth rate, but might be affected by the culture system. These results demonstrate that hairy root cultures of broccoli have potential as an alternative expression system for production of hGH1, and might also be useful for production of other therapeutic proteins.
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Affiliation(s)
- Edgar García López
- Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508, Colonia San Pedro Zacatenco, México Distrito Federal, CP, 07360
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Liu R, Liu Y, Liu CZ. Development of an efficient CFD-simulation method to optimize the structure parameters of an airlift sonobioreactor. Chem Eng Res Des 2013. [DOI: 10.1016/j.cherd.2012.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Liu R, Sun W, Liu CZ. Computational fluid dynamics modeling of mass transfer behavior in a bioreactor for hairy root culture. I. Model development and experimental validation. Biotechnol Prog 2011; 27:1661-71. [DOI: 10.1002/btpr.682] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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10
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Guerra PV, Yaylayan VA. Thermal generation of 3-amino-4,5-dimethylfuran-2(5H)-one, the postulated precursor of sotolone, from amino acid model systems containing glyoxylic and pyruvic acids. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:4699-4704. [PMID: 21417407 DOI: 10.1021/jf200293e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
4,5-Dimethyl-3-hydroxy-2(5H)-furanone (sotolone), a naturally occurring flavor impact compound, can be isolated from various sources, especially fenugreek seeds. It can also be thermally produced from intermediates generated from the Maillard reaction such as pyruvic and ketoglutaric acids, glyoxal, and 2,3-butanedione. A naturally occurring precursor of sotolone, 3-amino-4,5-dimethyl-2(5H)-furanone, was thermally generated for the first time from pyruvic acid and glycine or from glyoxylic acid and alanine model systems. Isotope labeling studies have implicated 4,5-dimethylfuran-2,3-dione as an intermediate that can be converted into 3-amino-4,5-dimethyl-2(5H)-furanone through Strecker-like interaction with any amino acid. Furthermore, these studies have also indicated the presence of two pathways for the formation of 4,5-dimethylfuran-2,3-dione, one requiring pyruvic acid and a formaldehyde source and the other requiring glyoxylic acid and acetaldehyde. Self-aldol condensation of pyruvic acid followed by lactonization and further aldol reaction with formaldehyde can generate the same intermediate as the self-aldol addition product of acetaldehyde with glyoxylic acid followed by lactonization. The pyruvic acid pathway was found to be a more efficient route than the glyoxylic acid pathway. Furthermore, the pyruvic acid/glycine model system was able to generate sotolone in the presence of moisture, and in the presence of ammonia, commercial sotolone was converted back into 3-amino-4,5-dimethyl-2(5H)-furanone.
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Affiliation(s)
- Paula Vanessa Guerra
- Department of Food Science and Agricultural Chemistry, McGill University, Ste. Anne de Bellevue, Quebec, Canada
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Nakahashi A, Yaguchi Y, Miura N, Emura M, Monde K. A vibrational circular dichroism approach to the determination of the absolute configurations of flavorous 5-substituted-2(5H)-furanones. JOURNAL OF NATURAL PRODUCTS 2011; 74:707-711. [PMID: 21381697 DOI: 10.1021/np1007763] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Sotolon (1) and maple furanone (2) are naturally occurring chiral furanones. These 5-substituted-2(5H)-furanones are industrially significant aroma compounds due to their characteristic organoleptic properties and extraordinarily low odor thresholds. Each enantiomer of 1 and 2 was successfully obtained by preparative enantioselective supercritical fluid chromatography. The absolute configuration of 1 was confirmed as (R)-(-)-1 and (S)-(+)-1 by adopting the vibrational circular dichroism (VCD) approach. The absolute configuration of 2, which has remained ambiguous since its discovery in 1957, was determined as (R)-(+)-2 and (S)-(-)-2 for the first time by the VCD technique. Surprisingly, the signs of the optical rotation of 2 are opposite of those of 1 regardless of their identical absolute configurations. This observation emphasizes the risk in absolute configurational assignments based on comparison of optical rotation signs of similar structures. Odor evaluation of the enantiomers of 2 revealed different odor intensities.
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Affiliation(s)
- Atsufumi Nakahashi
- Faculty of Advanced Life Science, Frontier Research Center for the Post-Genome Science and Technology, Hokkaido University, Kita 21, Nishi11, Sapporo 001-0021, Japan
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Krings U, Grimrath A, Linke D, Schindler S, Berger RG. Volatiles responsible for the seasoning-like flavour of cell cultures of Laetiporus sulphureus. FLAVOUR FRAG J 2011. [DOI: 10.1002/ffj.2040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- U. Krings
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried-Wilhelm-Leibniz Universität Hannover; Callinstrasse 5; D-30167; Hannover; Germany
| | - A. Grimrath
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried-Wilhelm-Leibniz Universität Hannover; Callinstrasse 5; D-30167; Hannover; Germany
| | - D. Linke
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried-Wilhelm-Leibniz Universität Hannover; Callinstrasse 5; D-30167; Hannover; Germany
| | - S. Schindler
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried-Wilhelm-Leibniz Universität Hannover; Callinstrasse 5; D-30167; Hannover; Germany
| | - R. G. Berger
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried-Wilhelm-Leibniz Universität Hannover; Callinstrasse 5; D-30167; Hannover; Germany
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13
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Gounaris Y. Biotechnology for the production of essential oils, flavours and volatile isolates. A review. FLAVOUR FRAG J 2010. [DOI: 10.1002/ffj.1996] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Buehrdel G, Beckert R, Friedrich B, Goerls H. The cycloacylation - 1,3-Acylrearrangement sequence as tool for highly substituted pyrrolones. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450332] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Sung LS, Huang SY. Lateral root bridging as a strategy to enhanceL-DOPA production inStizolobium hassjoo hairy root cultures by using a mesh hindrance mist trickling bioreactor. Biotechnol Bioeng 2006; 94:441-7. [PMID: 16329122 DOI: 10.1002/bit.20804] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Stizolobium hassjoo hairy roots exhibited a lateral root bridging behavior, enabling not only root dry weight but enhancement of intracellular L-DOPA content. When a single root tip was exerted a proper hindrance, the primary root growth was inhibited while lateral roots were profusely induced. The hindrance-induced lateral roots from individual primary root could bridge together under appropriate inoculation densities, leading to high density hairy root cultures producing secondary metabolites. In the present paper, a novel bioreactor was proposed based on a strategy of lateral root bridging by utilizing mesh as a hindrance, called "mesh hindrance mist trickling bioreactor (MHMTB)". Significant improvements of dry weight and L-DOPA production by using MHMTB were 1.8 and 2.2-folds, respectively, higher than those in the control run without the mesh hindrance within the root bed.
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Affiliation(s)
- Lin-Shiang Sung
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
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16
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Bez G, Zhao CG. Gallium(III) Chloride-Catalyzed Double Insertion of Isocyanides into Epoxides. Org Lett 2003; 5:4991-3. [PMID: 14682747 DOI: 10.1021/ol0359618] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Gallium(III) chloride-catalyzed double insertion of aryl isocyanides into terminal and disubstituted epoxides leads to alpha,beta-unsaturated alpha-amino iminolactones (3-amino-2-iminio-2,5-dihydrofurans). [reaction: see text]
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Affiliation(s)
- Ghanashyam Bez
- Department of Chemistry, University of Texas at San Antonio, 6900 N. Loop 1604 W., San Antonio, TX 78249-0698, USA
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