1
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Nakajima M. β-1,2-Glucans and associated enzymes. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01205-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Karami F, Ranjbar S, Ghasemi Y, Negahdaripour M. Analytical methodologies for determination of methotrexate and its metabolites in pharmaceutical, biological and environmental samples. J Pharm Anal 2019; 9:373-391. [PMID: 31890337 PMCID: PMC6931080 DOI: 10.1016/j.jpha.2019.06.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/05/2019] [Accepted: 06/19/2019] [Indexed: 02/08/2023] Open
Abstract
Methotrexate (MTX) is a folate antagonist drug used for several diseases, such as cancers, various malignancies, rheumatoid arthritis (RA) and inflammatory bowel disease. Due to its structural features, including the presence of two carboxylic acid groups and its low native fluorescence, there are some challenges to develop analytical methods for its determination. MTX is metabolized to 7-hydroxymethotrexate (7-OH-MTX), 2,4-diamino-N10-methylpteroic acid (DAMPA), and the active MTX polyglutamates (MTXPGs) in the liver, intestine, and red blood cells (RBCs), respectively. Additionally, the drug has a narrow therapeutic range; hence, its therapeutic drug monitoring (TDM) is necessary to regulate the pharmacokinetics of the drug and to decrease the risk of toxicity. Due to environmental toxicity of MTX; its sensitive, fast and low cost determination in workplace environments is of great interest. A large number of methodologies including high performance liquid chromatography equipped with UV-visible, fluorescence, or electrochemical detection, liquid chromatography-mass spectroscopy, capillary electrophoresis, UV-visible spectrophotometry, and electrochemical methods have been developed for the quantitation of MTX and its metabolites in pharmaceutical, biological, and environmental samples. This paper will attempt to review several published methodologies and the instrumental conditions, which have been applied to measure MTX and its metabolites within the last decade.
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Affiliation(s)
- Forough Karami
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Central Research Laboratory, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Chemistry Department, Yasouj University, Yasouj, Iran
| | - Sara Ranjbar
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Younes Ghasemi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Manica Negahdaripour
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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3
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Park S. Cyclic Glucans Enhance Solubility of Bioavailable Flavonoids. Molecules 2016; 21:molecules21111556. [PMID: 27854350 PMCID: PMC6273393 DOI: 10.3390/molecules21111556] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 12/12/2022] Open
Abstract
Diverse flavonoids are abundant in dietary food constituents and possess useful biological activities. However, some flavonoids have limited bioavailability due to their low solubility in water. As an important approach to enhance aqueous solubility, inclusion of hydrophobic guest molecules in hydrophilic hosts such as cyclic glucans has been used. This review summarizes applications of β-cyclodextrin, synthetic β-cyclodextrin derivatives, and newly synthesized derivatives of cyclosophoraoses as complexing agents to enhance the bioavailability of flavonoids such as baicalein, kaempferol, and naphthoflavones.
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Affiliation(s)
- Seyeon Park
- Department of Applied Chemistry, Dongduk Women's University, Seoul 136-714, Korea.
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4
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Cho E, Jeong D, Choi Y, Jung S. Properties and current applications of bacterial cyclic β-glucans and their derivatives. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0630-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Wang XF, Sun YK, Sun K, Ding YZ, Yuan RJ. Review: Separation and Pharmacology of Chiral Compounds in Traditional Chinese Medicine. ANAL LETT 2016. [DOI: 10.1080/00032719.2016.1169540] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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6
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Jeong D, Kim H, Dindulkar SD, Lee JY, Jung S. Preparation of a Novel Chiral Stationary Phase Containing Rhizobial Cyclic β-(1 → 2) Glucans for the Chiral Separation of Some Flavonoids. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daham Jeong
- Department of Bioscience and Biotechnology; Bio/Molecular Informatics Center & Center for Biotechnology Research in UBITA (CBRU), Konkuk University; Seoul 143-701 South Korea
| | - Hwanhee Kim
- Department of Bioscience and Biotechnology; Bio/Molecular Informatics Center & Center for Biotechnology Research in UBITA (CBRU), Konkuk University; Seoul 143-701 South Korea
| | - Someshwar D Dindulkar
- Department of Bioscience and Biotechnology; Bio/Molecular Informatics Center & Center for Biotechnology Research in UBITA (CBRU), Konkuk University; Seoul 143-701 South Korea
| | - Jae Yung Lee
- Department of Biological Science; Mokpo National University; Jeonnam 534-729 Korea
| | - Seunho Jung
- Department of Bioscience and Biotechnology; Bio/Molecular Informatics Center & Center for Biotechnology Research in UBITA (CBRU), Konkuk University; Seoul 143-701 South Korea
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7
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Enhanced solubility of galangin based on the complexation with methylated microbial cyclosophoraoses. J INCL PHENOM MACRO 2013. [DOI: 10.1007/s10847-013-0351-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Li C, Jiang Y. Analysis of Repaglinide Enantiomers in Pharmaceutical Formulations by Capillary Electrophoresis Using 2,6-Di-o-methyl- -cyclodextrin as a Chiral Selector. J Chromatogr Sci 2012; 50:739-43. [DOI: 10.1093/chromsci/bms064] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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9
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Quenched phosphorescence as alternative detection mode in the chiral separation of methotrexate by electrokinetic chromatography. Anal Bioanal Chem 2011; 400:2913-9. [PMID: 21499966 PMCID: PMC3102850 DOI: 10.1007/s00216-011-4991-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Revised: 03/28/2011] [Accepted: 04/06/2011] [Indexed: 10/28/2022]
Abstract
Quenched phosphorescence was used, for the first time, as detection mode in the chiral separation of methotrexate (MTX) enantiomers by electrokinetic chromatography. The detection is based on dynamic quenching of the strong emission of the phosphorophore 1-bromo-4-naphthalene sulfonic acid (BrNS) by MTX under deoxygenated conditions. The use of a background electrolyte with 3 mg/mL 2-hydroxypropyl-β-cyclodextrin and 20% MeOH in 25 mM phosphate buffer (pH 7.0) and an applied voltage of 30 kV allowed the separation of L-MTX and its enantiomeric impurity D-MTX with sufficient resolution. In the presence of 1 mM BrNS, a detection limit of 3.2 × 10(-7) M was achieved, about an order of magnitude better than published techniques based on UV absorption. The potential of the method was demonstrated with a degradation study and an enantiomeric purity assessment of L-MTX. Furthermore, L-MTX was determined in a cell culture extract as a proof-of-principle experiment to show the applicability of the method to biological samples.
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Huang L, Lin Q, Chen Y, Chen G. Transient isotachophoresis with field-amplified sample injection for on-line preconcentration and enantioseparation of some β-agonists. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:294-298. [PMID: 32938027 DOI: 10.1039/c0ay00556h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transient isotachophoresis with field-amplified sample injection (FASI), using β-CD as the chiral selector and tetrabutylammonium hydroxide (TBAOH) as the additive, was applied for on-line preconcentration and enantioseparation of three β-agonists, namely, cimaterol, clenbuterol and terbutaline. The experimental conditions for both simultaneous enantioseparation and on-line preconcentration methods have been investigated in detail. Under the optimum conditions, the detection limits (defined as S/N = 3) of this method were found to be 1 ng mL-1 for all three pairs of β-agonists enantiomers. Compared with conventional electrokinetic injection, the enhancement factors were greatly improved to be 250-fold. Finally, the proposed method has been applied for the analysis of human urine samples.
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Affiliation(s)
- Lu Huang
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Qi Lin
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Yiting Chen
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Guonan Chen
- Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
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11
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Development and validation of a nonaqueous capillary electrophoretic method for the enantiomeric purity determination of a synthetic intermediate of new 3,4-dihydro-2,2-dimethyl-2H-1-benzopyrans using a single-isomer anionic cyclodextrin derivative and an ionic liquid. J Chromatogr A 2010; 1217:7949-55. [DOI: 10.1016/j.chroma.2010.07.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 06/18/2010] [Accepted: 07/01/2010] [Indexed: 11/22/2022]
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12
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Jeon Y, Kwon C, Cho E, Jung S. Carboxymethylated cyclosophoraose as a novel chiral additive for the stereoisomeric separation of some flavonoids by capillary electrophoresis. Carbohydr Res 2010; 345:2408-12. [DOI: 10.1016/j.carres.2010.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2010] [Revised: 08/13/2010] [Accepted: 08/16/2010] [Indexed: 10/19/2022]
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13
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Prasad BB, Tiwari MP, Madhuri R, Sharma PS. Enatioselective quantitative separation of D- and L-thyroxine by molecularly imprinted micro-solid phase extraction silver fiber coupled with complementary molecularly imprinted polymer-sensor. J Chromatogr A 2010; 1217:4255-66. [PMID: 20483419 DOI: 10.1016/j.chroma.2010.04.055] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 04/14/2010] [Accepted: 04/20/2010] [Indexed: 10/19/2022]
Abstract
Thyroxine is a known disease biomarker which demands a highly sensitive and selective technique to measure ultratrace level with enantiodifferentiation of its optical isomers (d- and l-), in real samples. In this work, an approach of hyphenation between molecularly imprinted micro-solid phase extraction and a complementary molecularly imprinted polymer-sensor was adopted for enantioseparation, preconcentration, and analysis of d- and l-thyroxine. In both techniques, the same imprinted polymer, coated on a vinyl functionalized self-assembled monolayer modified silver wire, was used as the respective extraction fiber as well as sensor material. This combination enabled enhanced preconcentration of test analyte substantially so as to achieve the stringent limit [limit of detection: 0.0084 ng mL(-1), RSD=0.81%, S/N=3 (d-thyroxine); 0.0087 ng mL(-1), RSD=0.63%, S/N=3 (l-thyroxine)] of clinical detection of thyroid-related diseases, without any problems of non-specific false-positive contribution and cross-reactivity.
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Affiliation(s)
- Bhim Bali Prasad
- Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
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14
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Abstract
Periplasmic glucans (PGs) are general constituents in the periplasmic space of Proteobacteria. PGs from bacterial strains are found in larger amounts during growth on medium with low osmolarity and thus are often been specified as osmoregulated periplasmic glucans (OPGs). Furthermore, they appear to play crucial roles in pathogenesis and symbiosis. PGs have been classified into four families based on the structural features of their backbones, and they can be modified by a variety of non-sugar substituents. It has also recently been confirmed that novel PGs with various degrees of polymerization (DPs) and/or different substituents are produced under different growth conditions among Proteobacteria. In addition to their biological functions as regulators of low osmolarity, PGs have a variety of physico-chemical properties due to their inherent three-dimensional structures, hydrogen-bonding and complex-forming abilities. Thus, much attention has recently been focused on their physico-chemical applications. In this review, we provide an updated classification of PGs, as well as a description of the occurrences of novel PGs with substituents under various bacterial growth environments, the genes involved in PG biosynthesis and the various physico-chemical properties of PGs.
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Affiliation(s)
- Sanghoo Lee
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 143-701, Korea
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15
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Rousseau A, Gillotin F, Chiap P, Crommen J, Fillet M, Servais AC. Association of two single-isomer anionic CD in NACE for the chiral and achiral separation of fenbendazole, its sulphoxide and sulphone metabolites: application to their determination after in vitro metabolism. Electrophoresis 2010; 31:1482-7. [PMID: 20376816 DOI: 10.1002/elps.200900723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A NACE method was developed for the separation of fenbendazole (FBZ), a prochiral drug giving rise to chiral (oxfendazole or OFZ) and nonchiral (FBZ sulphone or FBZSO(2)) metabolites. First, the effect of the nature and the concentration of CD as well as that of the acidic BGE on the enantiomeric separation of OFZ were studied. OFZ enantiomers were completely resolved using a BGE made up of 10 mM ammonium formate and 0.5 M TFA in methanol containing 10 mM heptakis(2,3-di-O-acetyl-6-O-sulfo)-beta-CD and 10 mM heptakis(2,3-di-O-methyl-6-O-sulfo)-beta-CD. Moreover, the NACE method was found to be particularly well suited to the simultaneous determination of FBZ, OFZ enantiomers, and FBZSO(2). Thiabendazole was selected as an internal standard. The CD-NACE potential was then evaluated for in vitro metabolism studies using FBZ as a model case. The OFZ enantiomers and FBZSO(2) could be detected after incubation of FBZ in the phenobarbital-induced male rat liver microsomes systems.
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Affiliation(s)
- Anne Rousseau
- Department of Analytical Pharmaceutical Chemistry, Institute of Pharmacy, University of Liège, Liège, Belgium
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16
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Chiral Separation of Hesperetin and Hesperetin-O-glycoside in Capillary Electrophoresis Using Microbial β-1,2-Glucans. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.8.1870] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Synthesis of selenium nanowires morphologically directed by Shinorhizobial oligosaccharides. Carbohydr Res 2009; 344:1230-4. [DOI: 10.1016/j.carres.2009.04.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 04/13/2009] [Accepted: 04/15/2009] [Indexed: 11/17/2022]
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18
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Kang J, Kutscher D, Montes-Bayón M, Blanco-González E, Sanz-Medel A. Enantioselective determination of thyroxine enantiomers by ligand-exchange CE with UV absorbance and ICP-MS detection. Electrophoresis 2009; 30:1774-82. [DOI: 10.1002/elps.200800731] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2003-2004. MASS SPECTROMETRY REVIEWS 2009; 28:273-361. [PMID: 18825656 PMCID: PMC7168468 DOI: 10.1002/mas.20192] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Revised: 07/07/2008] [Accepted: 07/07/2008] [Indexed: 05/13/2023]
Abstract
This review is the third update of the original review, published in 1999, on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings the topic to the end of 2004. Both fundamental studies and applications are covered. The main topics include methodological developments, matrices, fragmentation of carbohydrates and applications to large polymeric carbohydrates from plants, glycans from glycoproteins and those from various glycolipids. Other topics include the use of MALDI MS to study enzymes related to carbohydrate biosynthesis and degradation, its use in industrial processes, particularly biopharmaceuticals and its use to monitor products of chemical synthesis where glycodendrimers and carbohydrate-protein complexes are highlighted.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK.
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20
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Methanolysis of ethyl esters of N-acetyl amino acids catalyzed by cyclosophoraoses isolated from Rhizobium meliloti. Carbohydr Res 2008; 343:274-81. [DOI: 10.1016/j.carres.2007.10.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2007] [Revised: 10/19/2007] [Accepted: 10/30/2007] [Indexed: 11/23/2022]
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21
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Methanolysis of 7-Acetoxy-4-Methylcoumarin Catalyzed by Cyclosophoraoses Isolated from Rhizobium meliloti. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.1.228] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Lee S, Cho E, Kwon C, Jung S. Cyclosophorohexadecaose and succinoglycan monomers as catalytic carbohydrates for the Strecker reaction. Carbohydr Res 2007; 342:2682-7. [PMID: 17761155 DOI: 10.1016/j.carres.2007.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2007] [Revised: 06/29/2007] [Accepted: 07/03/2007] [Indexed: 11/15/2022]
Abstract
Some microbial carbohydrates have been used as catalysts for the multicomponent Strecker reaction using trimethylsilyl cyanide (TMSCN). Alpha-Cyclosophorohexadecaose (alpha-C16) derived from Xanthomonas species and succinoglycan monomers derived from Rhizobium species acted as catalytic carbohydrates in the mixture solutions of methanol and water. Malonaldehyde bis(phenylimine) as a substrate was completely converted (yield: 100%) into its product to 100% by both alpha-C16 and the succinoglycan monomer (M2), having acetyl, pyruvyl, and succinyl groups as substituents after 1h. The catalytic abilities of the carbohydrates were dependent on the inherent structures of the substrates used in this study, where substrate 1 having a symmetrical structure rather than the others was favorably reacted with the alpha-C16 and M2. Through this study, we suggest that the microbial carbohydrates used in this study could be expected to be environmentally-benign catalysts for the synthesis of alpha-aminonitriles.
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Affiliation(s)
- Sanghoo Lee
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Seoul 143-701, Republic of Korea
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23
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Chiral Separation and Discrimination of Catechin by Microbial Cyclic β-(1→3),(1→6)-glucans Isolated from Bradyrhizobium japonicum. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.2.347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Kwon C, Park H, Jung S. Enantioseparation of some chiral flavanones using microbial cyclic beta-(1-->3),(1-->6)-glucans as novel chiral additives in capillary electrophoresis. Carbohydr Res 2006; 342:762-6. [PMID: 17234165 DOI: 10.1016/j.carres.2006.12.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 12/15/2006] [Accepted: 12/19/2006] [Indexed: 11/21/2022]
Abstract
Cyclic beta-(1-->3),(1-->6)-glucans, microbial cyclooligosaccharides produced by Bradyrhizobium japonicum USDA 110, were used as novel chiral additives for the enantiomeric separation of some flavanones such as eriodictyol, homoeriodictyol, hesperetin, naringenin, and isosakuranetin in capillary electrophoresis (CE). Among the flavanones, eriodictyol was separated with the highest resolution (R(s) 5.66) and selectivity factor (alpha 1.18) when 20mM cyclic beta-(1-->3),(1-->6)-glucans were added to the background electrolyte (BGE) at pH 8.3.
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Affiliation(s)
- Chanho Kwon
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, South Korea
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25
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Preparation of Amino-cyclosophoraoses from the Neutral Cyclosophoraoses Isolated fromRhizobium leguminosarum bv. trifolii. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.9.1485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Van Eeckhaut A, Michotte Y. Chiral separations by capillary electrophoresis: Recent developments and applications. Electrophoresis 2006; 27:2880-95. [PMID: 16688697 DOI: 10.1002/elps.200500375] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This paper provides an overview of the different classes of chiral selectors that are used in CE. The main properties of every class are described, together with the mechanism of enantioseparation. Newly introduced selectors are also discussed. Pharmaceutical and biomedical applications published from January 2004 till March 2005 are summarized.
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Affiliation(s)
- Ann Van Eeckhaut
- Department of Pharmaceutical Chemistry, Drug Analysis and Drug Information, Pharmaceutical Institute, Vrije Universiteit Brussel, Brussels, Belgium
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27
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Park H, Choi Y, Kang S, Lee S, Kwon C, Jung S. pH-Dependent inclusion complexation of carboxymethylated cyclosophoraoses to N-acetylphenylalanine. Carbohydr Polym 2006. [DOI: 10.1016/j.carbpol.2005.10.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Park H, Jung S. Separation of some chiral flavonoids by microbial cyclosophoraoses and their sulfated derivatives in micellar electrokinetic chromatography. Electrophoresis 2005; 26:3833-8. [PMID: 16167311 DOI: 10.1002/elps.200500194] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Neutral cyclosophoraoses (Cys) and highly sulfated cyclosophoraoses (HS-Cys) were successfully applied as chiral selectors with SDS for the separation of some chiral flavonoids in MEKC. HS-Cys were synthesized by the chemical modification of a family of neutral Cys isolated from a soil microorganism, Rhizobium meliloti 2011. Chiral catechin was separated with a resolution (R(s)) of 0.754 by neutral Cys and SDS. In the case of isosakuranetin and neohesperidin, resolution (R(s)) values of 1.483 and 1.306 were obtained with HS-Cys and SDS, respectively.
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Affiliation(s)
- Heylin Park
- Department of Advanced Technology Fusion, Bio/Molecular Informatics Center, Konkuk University, Seoul, Korea
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29
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Gübitz G, Schmid MG. Recent advances in chiral separation principles in capillary electrophoresis and capillary electrochromatography. Electrophoresis 2005; 25:3981-96. [PMID: 15597419 DOI: 10.1002/elps.200406173] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This review summarizes recent developments in chiral separation in capillary zone electrophoresis (CZE), electrokinetic chromatography (EKC), and capillary electrochromatography (CEC) covering literature published since the year 2000. New chiral selectors and innovative approaches for CE and CEC are introduced. Recent progress in column technology for CEC is highlighted and the development of new chiral stationary phases is discussed. This review is not dedicated to list applications but will focus on new developments.
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Affiliation(s)
- Gerald Gübitz
- Institute of Pharmaceutical Sciences, Dept. of Pharm. Chemistry, Karl-Franzens-University, Graz, Austria.
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pH-Dependent On-off Inclusion Complexation of Carboxymethylated Cyclosophoraoses with Neutral Red. B KOREAN CHEM SOC 2005. [DOI: 10.5012/bkcs.2005.26.4.675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Choi Y, Jung S. Molecular dynamics (MD) simulations for the prediction of chiral discrimination of N-acetylphenylalanine enantiomers by cyclomaltoheptaose (β-cyclodextrin, β-CD) based on the MM–PBSA (molecular mechanics–Poisson–Boltzmann surface area) approach. Carbohydr Res 2004; 339:1961-6. [PMID: 15261589 DOI: 10.1016/j.carres.2004.05.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Accepted: 05/26/2004] [Indexed: 11/22/2022]
Abstract
Molecular dynamics (MD) simulations were performed for the prediction of chiral discrimination of N-acetylphenylalanine enantiomers by cyclomaltoheptaose (beta-cyclodextrin, beta-CD). Binding free energies and various conformational properties were obtained using by the MM-PBSA (molecular mechanics Poisson-Boltzmann/surface area) approach. The calculated relative difference (DeltaDeltabinding) of binding free energy was in fine agreement with the experimentally determined value. The difference of rotameric distributions of guest N-acetylphenylalanine enantiomers complexed with the host, beta-CD, was observed after the conformational analyses, suggesting that the conformational changes of guest captured within host cavity would be a decisive factor for enantiodifferentiation at a molecular level.
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Affiliation(s)
- Youngjin Choi
- Department of Microbial Engineering and Bio/Molecular Informatics Center, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea
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Lee S, Jung S. Cyclosophoraose as a catalytic carbohydrate for methanolysis. Carbohydr Res 2004; 339:461-8. [PMID: 15013382 DOI: 10.1016/j.carres.2003.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2003] [Accepted: 11/13/2003] [Indexed: 10/26/2022]
Abstract
A novel catalytic methanolysis can be induced by a natural cyclooligosaccharide, a cyclosophoraose (cyclic-(1-->2)-beta-D-glucan, Cys), which is a member of a family of unbranched cyclooligosaccharides produced as intra- or extraoligosaccharides by soil microorganisms of the genus, Rhizobium. Cys catalyzed the methanolysis for 5(4H)-oxazolones and various phospholipids. Cys enhanced the methanolysis reaction about 9200-fold for a benzylidene oxazolone or 250-fold for dipalmitoylphosphatidylcholine comparing with control. In this study, we describe that natural cyclosophoraoses isolated from the Rhizobium species function as catalytic carbohydrates for the methanolysis.
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Affiliation(s)
- Sanghoo Lee
- Department of Microbial Engineering and Bio/Molecular Informatics Center, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea
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Lee S, Park H, Seo D, Choi Y, Jung S. Synthesis and characterization of carboxymethylated cyclosophoraose, and its inclusion complexation behavior. Carbohydr Res 2004; 339:519-27. [PMID: 15013389 DOI: 10.1016/j.carres.2003.11.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2003] [Accepted: 11/13/2003] [Indexed: 11/19/2022]
Abstract
Carboxymethylated cyclosophoraoses (CM-Cys) were synthesized by chemical modification of a family of neutral cyclosophoraoses isolated from Rhizobium leguminosarum biovar trifolii. Structural analyses of the CM-Cys were carried out using NMR and FTIR spectroscopies, and the molecular weight distributions were confirmed with MALDI-TOF mass spectrometry. Based on structural characterization, native cyclosophoraoses were successfully substituted with carboxymethyl groups at the OH-4 and OH-6 of the glucose residues with degrees of substitution (DS) ranging from 0.012 to 0.290. CM-Cys was also used as a host for the inclusion complexation with hydrobenzoin (HB) and N-acetyltryptophan (N-AcTrp) as guest molecules. NMR spectroscopic analyses of the complexes showed that the CM-Cys induced chemical shifts of some protons of the guest molecules upon the complexation. Phase solubility studies of the guest molecules by CM-Cys were performed using HPLC, and the results were compared with those of native cyclosophoraoses. The solubility of HB and N-AcTrp was enhanced by the CM-Cys about 5.1- and 299-fold, respectively.
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Affiliation(s)
- Sanghoo Lee
- Department of Microbial Engineering and Bio/Molecular Informatics Center, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea
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Lee S, Choi Y, Lee S, Jeong K, Jung S. Chiral recognition based on enantioselective interactions of propranolol enantiomers with cyclosophoraoses isolated fromRhizobium meliloti. Chirality 2004; 16:204-10. [PMID: 14770418 DOI: 10.1002/chir.20010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cyclosophoraoses isolated from Rhizobium meliloti, as an NMR chiral shift agent, were used to discriminate propranolol enantiomers. Continuous variation plot made from the complex of cyclosophoraoses with propranolol showed that the diastereomeric complex had predominantly 1:1 stoichiometry through UV spectroscopic analysis. The chiral recognition of propranolol enantiomers by cyclosophoraoses was investigated through the determination of binding constant based on the (13)C NMR chemical shift changes. The averaged K(obs) values from the plots were 55.7 M(-1) for (R)-(+)-propranolol and 36.6 M(-1) for (S)-(-)-propranolol, respectively. Enantioselectivity (alpha = K(R+)/K(S(-)) of 1.52 was then obtained. Computational calculation also revealed that (R)-(+) propranolol was more tightly bound with cyclosophoraose than (S)-(-)-propranolol due to the enhanced van der Waals interaction.
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Affiliation(s)
- Sanghoo Lee
- Department of Microbial Engineering, and Bio/Molecular Informatics Center, Konkuk University, 1 Hwaynag-dong Gwangjin-gu, Seoul 143-701, South Korea
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