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Hinou H. DHB Matrix with Additives for Direct MALDI Mass Spectrometry of Carbohydrates and Glycoconjugates. TRENDS GLYCOSCI GLYC 2023. [DOI: 10.4052/tigg.2214.1j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Hinou H. DHB Matrix with Additives for Direct MALDI Mass Spectrometry of Carbohydrates and Glycoconjugates. TRENDS GLYCOSCI GLYC 2023. [DOI: 10.4052/tigg.2214.1e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Veeraperumal S, Qiu HM, Tan CS, Ng ST, Zhang W, Tang S, Cheong KL, Liu Y. Restitution of epithelial cells during intestinal mucosal wound healing: The effect of a polysaccharide from the sclerotium of Lignosus rhinocerotis (Cooke) Ryvarden. JOURNAL OF ETHNOPHARMACOLOGY 2021; 274:114024. [PMID: 33727110 DOI: 10.1016/j.jep.2021.114024] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 01/09/2021] [Accepted: 03/09/2021] [Indexed: 02/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lignosus rhinocerotis (Cooke) Ryvarden cultivar TM02, also known as tiger's milk mushroom, is regarded as important folk medicine in Malaysia, while is used for the treatment of liver cancer, chronic hepatitis, gastric ulcer in traditional Chinese medicine. However, there is no compilation of scientific evidence that its protection for gastric, and no attempts have been made to understand how polysaccharides in Lignosus rhinocerotis might promote intestinal mucosal wound healing. AIM OF THE STUDY This study aimed to investigate the effect and mechanism of β-glucan prepared from L. rhinocerotis using an enzymatic method on epithelial restitution during intestinal mucosal damage. MATERIALS AND METHODS Based on FT-IR, MALDI-TOF-MS, HPSEC-MALLS-RID, and AFM, the structure of polysaccharides from L. rhinocerotis was analysed. In addition, polysaccharides were used to test for wound healing activity in IEC-6 cells by measuring cell migration, proliferation, and expression of cell division control protein 42, Rac-1, RhoA, and Par-3. RESULTS β-glucan was extracted using enzyme-assisted extraction, and a yield of approximately 8.5 ± 0.8% was obtained from the dried biomass. The β-glucan extracted by enzyme-assisted extraction (EAE) of polysaccharides was composed entirely of D-glucose with a total carbohydrate content of 95.5 ± 3.2%. The results of HPLC, FTIR, and MALDI-TOF-MS analyses revealed EAEP to be confirmed as β-glucan. The molecular weight of prepared β-glucan was found to be 5.315 × 104 g/mol by HPSEC-MALLS-RID. Furthermore, mucosal wound healing studies showed that the treatment of IEC-6 with a β-glucan concentration of 200 μg/mL promoted cell migration and proliferation, and it enhanced the protein expression of cell division control protein 42, Rac-1, RhoA, and Par-3. CONCLUSIONS The present study reveals that the prepared β-glucan accelerates intestinal epithelial cell proliferation and migration via activation of Rho-dependent pathway. Hence, β-glucan can be employed as a prospective therapeutic agent for the treatment of diseases associated with gastrointestinal mucosal damage, such as peptic ulcers and inflammatory bowel disease.
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Affiliation(s)
- Suresh Veeraperumal
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China
| | - Hua-Mai Qiu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China
| | - Chon-Seng Tan
- Biotechnology Research Centre, MARDI, P.O.Box 12301, 50744, Kuala Lumpur, Malaysia
| | - Szu-Ting Ng
- Ligno Biotech Sdn Bhd, Taman Perindustrian Balakong Jaya 2, Selangor, 43300, Balakong Jaya, Malaysia
| | - Wancong Zhang
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Shijie Tang
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China.
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China.
| | - Yang Liu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China.
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Yoo HJ, Kim DH, Shin D, Oh Y, Lee S, Lee JY, Choi YJ, Lee SH, Lee KS, Kim Y, Cho K. Recent developments in pre-treatment and analytical techniques for synthetic polymers by MALDI-TOF mass spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:5767-5800. [PMID: 33241791 DOI: 10.1039/d0ay01729a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A great deal of effort has been expended to develop accurate means of determining the properties of synthetic polymers using matrix-assisted laser desorption/ionization (MALDI) time-of-flight (TOF) mass spectrometry (MS). Many studies have focused on the importance of sample pre-treatment to obtain accurate analysis results. This review discusses the history of synthetic polymer characterization and highlights several applications of MALDI-TOF MS that recognize the importance of pre-treatment technologies. The subject area is of significance in the field of analytical chemistry, especially for users of the MALDI technique. Since the 2000s, many such technologies have been developed that feature improved methods and conditions, including solvent-free systems. In addition, the recent diversification of matrix types and the development of carbon-based matrix materials are described herein together with the current status and future directions of MALDI-TOF MS hardware and software development. We provide a summary of processes used for obtaining the best analytical results with synthetic polymeric materials using MALDI-TOF MS.
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Affiliation(s)
- Hee-Jin Yoo
- Center for Research Equipment, Korea Basic Science Institute, 162, Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungcheongbuk-do 28119, Korea.
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Influence of Maitake ( Grifola frondosa) Particle Sizes on Human Mesenchymal Stem Cells and In Vivo Evaluation of Their Therapeutic Potential. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8193971. [PMID: 32258147 PMCID: PMC7091544 DOI: 10.1155/2020/8193971] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 12/20/2019] [Accepted: 02/21/2020] [Indexed: 01/03/2023]
Abstract
Maitake (Grifola frondosa) mushroom has received an enormous amount of attention as a dietary supplement due to its high nutritional values. The particle sizes of G. frondosa mushrooms were monitored by a classifying mill. β-Glucans are the bioactive component of the mushroom, and it was revealed through Fourier transform infrared spectroscopy (FTIR), proton and carbon nuclear magnetic resonance (1H and 13C-NMR), matrix-assisted laser desorption/ionization, and time-of-flight (MALDI-TOF) spectrometry. The biocompatibility of G. frondosa particles, as well as induced osteogenesis of hMSCs, was evaluated through WST-1 assay and alizarin staining (ARS) technique, respectively. Notably, enhanced cell viability was noted in the presence of G. frondosa. Significantly improved calcium deposition has observed from hMSCs with G. frondosa, suggesting to their mineralization potential. The expression of osteogenic related gene markers was examined in the presence of G. frondosa through real-time polymerase chain reaction (qPCR) technique. The upregulation of osteogenic gene markers in the presence of G. frondosa particles was indicating their superior osteogenic potential. Besides, G. frondosa also activated the secretion of various kinds of proteins from the hMSCs indicating their potential for tissue engineering applications. Enhanced secretion of different immunoglobulins was observed in rat serum in the presence of G. frondosa, further demonstrating their therapeutic nature. Therefore, G. frondosa is effective for enhanced osteogenesis and can be utilized as a natural, edible, and osteogenic agent.
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Qu L, Jiang Y, Huang X, Cui M, Ning F, Liu T, Gao Y, Wu D, Nie Z, Luo L. High-Throughput Monitoring of Multiclass Syrup Adulterants in Honey Based on the Oligosaccharide and Polysaccharide Profiles by MALDI Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11256-11261. [PMID: 31545583 DOI: 10.1021/acs.jafc.9b05317] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Honey is a natural product that could be easily adulterated with various cheaper sweeteners. In the present study, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) was applied for the detection of honey adulteration based on oligosaccharide and polysaccharide profiles. MS-based strategy could reveal the presence of polysaccharides with higher degree of polymerization (DP ≥ 13) and abnormal trends of saccharides in adulterated honey samples, which could be used as indicators for the identification of honey adulteration with high-fructose corn syrup and corn syrup. MS/MS-based strategy was proposed to characterize the difference in the composition of oligosaccharide isomers between honey samples and adulterated ones with corn syrup or invert syrup, in which the [M+Cl]- of disaccharides, trisaccharides, and tetrasaccharides were fragmented to give diagnostic product ion pairs. The method is effective and robust for the high-throughput monitoring of honey adulteration, and provides a new perspective for the identification of other high-carbohydrate foods.
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Affiliation(s)
- Liangliang Qu
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Yuming Jiang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Xueyong Huang
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Meng Cui
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Fangjian Ning
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Tao Liu
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Yuanyuan Gao
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Dong Wu
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
| | - Zongxiu Nie
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Liping Luo
- School of Life Sciences , Nanchang University , Nanchang 330031 , China
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Structural Elucidation and Immune-Enhancing Effects of Novel Polysaccharide from Grifola frondosa. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7528609. [PMID: 31139649 PMCID: PMC6500627 DOI: 10.1155/2019/7528609] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/19/2019] [Accepted: 03/28/2019] [Indexed: 12/21/2022]
Abstract
Beta-glucan (β-glucan) is a macromolecule structure where glucose unit has bonded through β-glycosidic bond at 1 and 3 positions. It is well known as a natural immunomodulator without exhibiting any side effects via enhancing immunity. Mushroom contains a large amount of β-glucan and it has anticancerous and antioxidant efficacy. Structure and physical properties of β-glucan are highly influenced by the types of mushroom. In particular, Grifola frondosa has β-1, 3 and β-1, 6 bonds in their structure. It has been noted that β-glucan content also depends upon the size of mushroom particles. The exact content of β-glucan and their immunological activity by a particle size of G. frondosa have yet to be fully elucidated. Herein, β-glucan contents were analyzed according to the particle size of leaf mushroom followed by cell activation and immunoactivity analysis. The highest β-glucan content was observed at a particle size of 20-30 μm (27.65 ± 0.30 w/w). All samples showed ~ 103% cell activation compared to the control and greater cell activity was observed at higher concentration. The significant increase in cytokines secretion was observed in the presence of 20-30 μm particle size of G. frondosa compared to the control. This study suggested that 20-30 μm size is the suitable size of G. frondosa that can be used as a health supplement and food additive to act as an immune booster, hypotensive agent, and hypoglycemic agent.
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Zhao X, Cai P, Sun C, Pan Y. Application of ionic liquids in separation and analysis of carbohydrates: State of the art and future trends. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.12.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Mangolim CS, da Silva TT, Fenelon VC, Koga LN, Ferreira SBDS, Bruschi ML, Matioli G. Description of recovery method used for curdlan produced by Agrobacterium sp. IFO 13140 and its relation to the morphology and physicochemical and technological properties of the polysaccharide. PLoS One 2017; 12:e0171469. [PMID: 28245244 PMCID: PMC5330454 DOI: 10.1371/journal.pone.0171469] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 01/21/2017] [Indexed: 12/20/2022] Open
Abstract
Curdlan is a linear polysaccharide considered a dietary fiber and with gelation properties. This study evaluated the structure, morphology and the physicochemical and technological properties of curdlan produced by Agrobacterium sp. IFO 13140 recovered by pre-gelation and precipitation methods. Commercial curdlan submitted or otherwise to the pre-gelation process was also evaluated. The data obtained from structural analysis revealed a similarity between the curdlan produced by Agrobacterium sp. IFO 13140 (recovered by both methods) and the commercial curdlans. The results showed that the curdlans evaluated differed significantly in terms of dispersibility and gelation, and only the pre-gelled ones had significant potential for food application, because this method influence on the size of the particles and in the presence of NaCl. In terms of technological properties, the curdlan produced by Agrobacterium sp. IFO 13140 (pre-gelation method) had a greater water and oil holding capacity (64% and 98% greater, respectively) and a greater thickening capacity than the pre-gelled commercial curdlan. The pre-gelled commercial curdlan displayed a greater gelling capacity at 95°C than the others. When applied to food, only the pre-gelled curdlans improved the texture parameters of yogurts and reduced syneresis. The curdlan gels, which are rigid and stable in structure, demonstrated potential for improving the texture of food products, with potential industrial use.
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Affiliation(s)
- Camila Sampaio Mangolim
- Postgraduate Program in Food Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
| | | | - Vanderson Carvalho Fenelon
- Postgraduate Program in Pharmaceutical Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
| | - Luciana Numata Koga
- Postgraduate Program in Pharmaceutical Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
| | | | - Marcos Luciano Bruschi
- Postgraduate Program in Pharmaceutical Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
| | - Graciette Matioli
- Postgraduate Program in Food Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
- Postgraduate Program in Pharmaceutical Science, State University of Maringá (UEM), Maringá, Paraná, Brazil
- * E-mail:
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López-García M, García MSD, Vilariño JML, Rodríguez MVG. MALDI-TOF to compare polysaccharide profiles from commercial health supplements of different mushroom species. Food Chem 2015; 199:597-604. [PMID: 26776013 DOI: 10.1016/j.foodchem.2015.12.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/30/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
Abstract
In this work MALDI-TOF mass spectroscopy was investigated to characterise the β-glucan profiles of several commercial health supplements, without any derivatisation or purification pre-treatment. The effect of two solvents (water and dimethyl sulfoxide) and two MALDI matrices (2,5-dihydroxybenzoic acid and 2',4',6'-trihydroxyacetophenone) was first evaluated on dextran standards. MALDI-TOF was found as a useful and quick technique to obtain structural information of diverse food supplements based on mushroom extracts. The MALDI polysaccharide profiles of 5 supplements from different mushroom species were qualitatively similar showing [Glucan+Na](+) cations with a peak-to-peak mass difference of 16 Da consistent with the repeating unit of the β-(1→3)-glucan. The profiles strongly depended on the sample solvent used, with m/z values around 5000-8000 for water and 2000 for dimethyl sulfoxide; differences between samples were revealed in the molecular weight of the aqueous preparation, with the highest values for Maitake and Cordyceps species.
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Affiliation(s)
- Marta López-García
- Grupo de Polímeros, Centro de Investigacións Tecnolóxicas (CIT), Universidade da Coruña, Campus de Esteiro s/n, 15403 Ferrol, Spain
| | - María Sonia Dopico García
- Grupo de Polímeros, Centro de Investigacións Tecnolóxicas (CIT), Universidade da Coruña, Campus de Esteiro s/n, 15403 Ferrol, Spain
| | - José Manuel López Vilariño
- Grupo de Polímeros, Centro de Investigacións Tecnolóxicas (CIT), Universidade da Coruña, Campus de Esteiro s/n, 15403 Ferrol, Spain.
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Huong LM, Thu HP, Thuy NTB, Ha TTH, Thi HTM, Trang MT, Hang TTN, Nghi DH, Phuc NX, Quang DT. Preparation and Antitumor-promoting Activity of Curcumin Encapsulated by 1,3-β-Glucan Isolated from Vietnam Medicinal MushroomHericium erinaceum. CHEM LETT 2011. [DOI: 10.1246/cl.2011.846] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
Glycosylation defines the adhesive properties of animal cell surfaces and the surrounding extracellular environments. Because cells respond to stimuli by altering glycan expression, glycan structures vary according to spatial location in tissue and temporal factors. These dynamic structural expression patterns, combined with the essential roles glycans play in physiology, drive the need for analytical methods for glycoconjugates. In addition, recombinant glycoprotein drug products represent a multibillion dollar market. Effective analytical methods are needed to speed the identification of new targets and the development of industrial glycoprotein products, both new and biosimilar. Mass spectrometry is an enabling technology in glycomics. This review summarizes mass spectrometry of glycoconjugate glycans. The intent is to summarize appropriate methods for glycans given their chemical properties as distinct from those of proteins, lipids, and small molecule metabolites. Special attention is given to the uses of mass spectral profiling for glycomics with respect to the N-linked, O-linked, ganglioside, and glycosaminoglycan compound classes. Next, the uses of tandem mass spectrometry of glycans are summarized. The review finishes with an update on mass spectral glycoproteomics.
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Affiliation(s)
- Joseph Zaia
- Department of Biochemistry, Boston University, Boston, Massachusetts, USA.
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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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Arancia S, Sandini S, Cassone A, De Bernardis F. Use of 65-kDa mannoprotein gene primers for real-time identification of Candida albicans. CURRENT FUNGAL INFECTION REPORTS 2008. [DOI: 10.1007/s12281-008-0031-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hung WT, Wang SH, Chen CH, Yang WB. Structure determination of beta-glucans from Ganoderma lucidum with matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. Molecules 2008; 13:1538-50. [PMID: 18794771 PMCID: PMC6245394 DOI: 10.3390/molecules13081538] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2008] [Revised: 06/21/2008] [Accepted: 07/25/2008] [Indexed: 11/16/2022] Open
Abstract
A novel method that uses matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to analyze molecular weight and sequencing of glucan in Ganoderma lucidum is presented. Thus, β-glucan, which was isolated from fruiting bodies of G. lucidum, was measured in a direct and fast way using MALDI mass spectrometry. In addition, tandem mass spectrometry of permethylated glucans of G. lucidum, dextran, curdlan and maltohexaose were also pursued and different fragment patterns were obtained. The G. lucidum glucan structure was determined and this method for linkage analysis of permethylated glucan has been proven feasible.
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Affiliation(s)
- Wei-Ting Hung
- Genomics Research Center, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Shwu-Huey Wang
- Instrument Center, Taipei Medical University, Taipei 11031, Taiwan
| | - Chung-Hsuan Chen
- Genomics Research Center, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
| | - Wen-Bin Yang
- Genomics Research Center, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei 11529, Taiwan
- Author to whom correspondence should be addressed. Tel.: +886-2-27899930 ext.339; Fax: +886-2-27899931; E-mail:
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Functional biopolymers produced by biochemical technology considering applications in food engineering. KOREAN J CHEM ENG 2007. [DOI: 10.1007/s11814-007-0047-1] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Preparation of polysaccharide-coated nanoparticles by emulsion polymerization of styrene. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-006-1579-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chan TWD, Chan PK, Tang KY. Determination of molecular weight profile for a bioactive β-(1→3) polysaccharides (Curdlan). Anal Chim Acta 2006; 556:226-36. [PMID: 17723353 DOI: 10.1016/j.aca.2005.08.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Revised: 08/22/2005] [Accepted: 08/23/2005] [Indexed: 11/16/2022]
Abstract
This paper focuses on the development of methodology based on MALDI-TOF mass spectrometry for evaluation of molecular weight profile of the water-insoluble portion of an extracellular polysaccharide, i.e. Curdlan. As previously demonstrated, MALDI analysis of water-insoluble Curdlan fraction gave number-average (M(n)) and weight-average (M(w)) molecular weights of 8000 and 8700 Da, respectively [T.W.D. Chan, K.Y. Tang, Rapid Commun. Mass Spectrom. 17 (2003) 887]. To validate the MALDI determined molecular weight information, several additional analytical schemes were used to analysis the water-insoluble Curdlan fraction. In all cases, the water-insoluble Curdlan sample was fractionated by gel permeation chromatography (GPC) using Sephadex G-75 column. The M (n) of low-mass and narrow distributed polysaccharide fractions were obtained by MALDI-MS. Good linearity was found in the calibration plot constructed from the measured M (n)-values and the corresponding elution time/volume. The relative quantity of various fractionated samples was then measured using three different approaches. These include (a) direct refractometric analysis; (b) UV-vis absorption analysis of the Aniline Blue stained sample; and (c) GC-MS analysis of the hydrolyzed and TMS-derivatized sample. Using results obtained from theses quantification methods and the correlation function between the GPC retention time and M (n), the MW and MWD of water-insoluble Curdlan were obtained. Our results demonstrated that the previous use of MALDI methods for measuring M(n), M(w) and polydispersity (PD) of water-insoluble Curdlan (with and without GPC fractionation) were unreliable. However, by standardizing the narrow distributed polysaccharides using MALDI-MS method, reliable molecular weight information for dispersed polysaccharides could be obtained. The M (n),M (w) and PD of the water-insoluble Curdlan were found to be 22,000, 31,500 Da and 1.40, respectively.
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Affiliation(s)
- T-W D Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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Determination of neutral oligosaccharides in vegetables by matrix-assisted laser desorption/ionization mass spectrometry. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2004.04.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Mugo SM, Bottaro CS. Characterization of humic substances by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2004; 18:2375-2382. [PMID: 15386633 DOI: 10.1002/rcm.1635] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) and laser desorption/ionization (LDI-)TOFMS have been used to characterize Suwannee River humic substances, obtained from the International Humic Substances Society (IHSS), and Armadale soil fulvic acid (ASFA). An array of MALDI matrices were tested for use with humic substances, including alpha-cyano-4-hydroxycinammic acid (CHCA), 2-(4-hydroxyphenylazo)benzoic acid (HABA), 2,5-dihydroxybenzoic acid (DHBA), sinapinic acid, dithranol and norharmane. DHBA yielded the best results, exhibiting superior ionization efficiency, low noise, broad applicability to the analytes of interest, and most importantly producing an abundance of high mass ions, the highest observed being m/z 1848. A number of sample preparation modes were investigated; the overlayer method improved sample/matrix homogeneity and hence shot-to-shot reproducibility. The choice of the matrix, mass ratio of analyte to matrix, and the sample preparation protocol, were found to be the most critical factors governing the quality of the mass spectra. Matrix suppression was greatly enhanced by ensuring good mixing of matrix and analyte in the solid phase, proper optimization of the matrix/analyte ratio, and optimizing delayed extraction to ensure complete matrix-analyte reaction in the plume before ions are moved to the flight tube. A number of common features, in particular specific ions which could not be attributed to the matrices or to contaminants, were present in the spectra of all the humic substances, regardless of origin or operational definition. Additionally, a prominent repeating pattern of peaks separated by 55, 114 and 169 Da was clearly observed in both LDI and MALDI, suggesting that the humic compounds studied here may have quasi-polymeric or oligomeric features.
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Affiliation(s)
- Samuel M Mugo
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada
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