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Duque-Ortiz A, Rivera-Chávez J, Pastor-Palacios G, Lara-González S. The Nicotiana tabacum UGT89A2 enzyme catalyzes the glycosylation of di- and trihydroxylated benzoic acid derivatives. PHYTOCHEMISTRY 2024; 226:114203. [PMID: 38969251 DOI: 10.1016/j.phytochem.2024.114203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 06/27/2024] [Accepted: 07/02/2024] [Indexed: 07/07/2024]
Abstract
Glycosyltransferases catalyze the transfer of a glycoside group to a wide range of acceptor compounds to produce glycoconjugates with diverse biological and pharmacological activities. The present work reports the identification and biochemical characterization of Nicotiana tabacum UGT89A2 glycosyltransferase (NtUGT89A2). The enzyme is a monomer in solution that catalyzes the O-β-glucosylation of di- and tri-hydroxylated and chlorinated derivatives of benzoic acid. NtUGT89A2 has a preference for 2,5-dihydroxybenzoic acid (2,5-DHBA) over 2,3-dihydroxybenzoic acid (2,3-DHBA) and 2,4-dihydroxybenzoic acid (2,4-DHBA). Other substrates that can be used by NtUGT89A2 include 3,4,5-trihydroxybenzoic acid and chlorinated derivatives such as 2-chloro-5-hydroxybenzoic acid (2-Cl-5-HBA). The substrates of NtUGT89A2 were identified by thermal stability experiments, where we observed a maximum increase of the thermal denaturation midpoint (Tm) of 10 °C in the presence of 2,5-DHBA and UDP-glucose. On the other hand, the highest specific activity was obtained with 2,5-DHBA (225 ± 1.7 nkat/mg). Further characterization revealed that the enzyme has a micromolar affinity for its substrates. Notably, the enzyme retains full activity after incubation at 70 °C for 1 h. These results provide a basis for future functional and structural studies of NtUGT89A2.
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Affiliation(s)
- Arianna Duque-Ortiz
- IPICYT, División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A. C., 78216, San Luis Potosí, S.L.P., Mexico
| | - José Rivera-Chávez
- Departamento de Productos Naturales, Instituto de Química., UNAM, 04510, Ciudad de México, Mexico
| | - Guillermo Pastor-Palacios
- Unidad Profesional Interdisciplinaria de Ingeniería, Campus Guanajuato, Instituto Politécnico Nacional, 36275, Silao de la Victoria, Guanajuato, Mexico.
| | - Samuel Lara-González
- IPICYT, División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A. C., 78216, San Luis Potosí, S.L.P., Mexico.
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Aggrey MO, Wang WQ, Xuan LJ. Novel indoloquinoline alkaloid glycosides from Cryptolepis sanguinolenta (Lindl.) Schltr. Nat Prod Res 2024; 38:2756-2762. [PMID: 37427973 DOI: 10.1080/14786419.2023.2232929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/19/2023] [Accepted: 06/30/2023] [Indexed: 07/11/2023]
Abstract
To explore the phytochemistry of the African ethnomedicinal plant Cryptolepis sanguinolenta (Lindl.) Schltr. (Apocynaceae) for rare indoloquinoline alkaloids, two novel indoloquinoline alkaloid glycosides, namely Cryptospirosanguine A (1) and B (2), were isolated from an ethanolic extract of the root. Their structures were elucidated based on spectral evidence. Furthermore, two known terpenoids were isolated from this plant for the first time.
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Affiliation(s)
- Mike Okweesi Aggrey
- Department of Pharmacognosy and Herbal Medicine, University of Health and Allied Sciences, Ho, Ghana
| | - Wen-Qiong Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Li-Jiang Xuan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
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Xiao Y, Cheng Y, Shi S, Li R, Dong H, Han F. Generation of xanthohumol derivatives through fungi-mediated biotransformation. Nat Prod Res 2024:1-7. [PMID: 39066549 DOI: 10.1080/14786419.2024.2381648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 07/03/2024] [Accepted: 07/13/2024] [Indexed: 07/28/2024]
Abstract
Xanthohumol (XTH, 1), a major prenylated chalcone in hops, has attracted considerable interests because of its pharmaceutical potency. To explore more related derivatives of XTH, its biotransformation was performed using the in vitro microbial model. Fungus Mucor sp. exhibited a robust biocatalytic feature to transform the substrate. Preparative fungi-mediated biotransformation led to the isolation of two new (2 and 5) and eight known (3, 4 and 6-11) metabolites. The two new metabolites were identified as (2″R)-dihydroxanthohumol B (2) and xanthohumol L 4'-O-β-D-glucopyranoside (5) based on the combined spectroscopic analysis. According to the cytotoxic activities of all metabolites, compounds 7 and 9 showed relatively sensitive cytotoxic activity against A375 and A549 cancer cell lines, respectively. These findings not only provided a biological approach to achieve the derivatives of XTH but also gave an information for the lead optimisation of XTH for the development of potential anti-cancer agents.
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Affiliation(s)
- Yina Xiao
- College of Life Science and Technology, Wuhan Polytechnic University, Wuhan, China
- College of Pharmacy, Chonnam National University, Gwangju, Korea
| | - Yutong Cheng
- State Key Laboratory of Macromolecular Drugs and Large-scale Manufacturing, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Shi Shi
- State Key Laboratory of Macromolecular Drugs and Large-scale Manufacturing, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Rui Li
- College of Life Science and Technology, Wuhan Polytechnic University, Wuhan, China
| | - Huijun Dong
- State Key Laboratory of Macromolecular Drugs and Large-scale Manufacturing, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Fubo Han
- College of Pharmacy, Chonnam National University, Gwangju, Korea
- State Key Laboratory of Macromolecular Drugs and Large-scale Manufacturing, School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
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Shi L, Li S, Li X, Peng B, Hu Z, Hu H, Luo G, Yao H. Insight into volatile-char interaction mechanisms of biomass torrefaction based on three major components. BIORESOURCE TECHNOLOGY 2024; 408:131109. [PMID: 39009045 DOI: 10.1016/j.biortech.2024.131109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/07/2024] [Accepted: 07/12/2024] [Indexed: 07/17/2024]
Abstract
Volatile-char interaction is an important phenomenon in biomass thermal conversion process, which significantly contributes to the decomposition, deoxygenation and upgrading of biomass. However, the deep insight into volatile-char interaction mechanisms between hemicellulose, cellulose and lignin is currently unclear. In this work, above mechanism was studied through systematic single-/bi-component torrefactions and the follow-up char analysis. Results demonstrate that only hemicellulose volatile and cellulose char interaction exists during torrefaction at 250 °C, causing over 19.9 wt% of mass loss and 27.3 wt% of O removal for cellulose. This volatile-char interaction causes significant depolymerization and amorphization of cellulose by hydrolysis, acid hydrolysis and esterification reactions. The depolymerized and amorphous cellulose partly thermally decomposes to dehydrated sugars and aromatic compounds through dehydroxylation and aromatization reactions. A volatile-char interaction mechanism model is thus developed. This work provides theoretical insight into biomass thermal conversion and provides basis for the development of new thermochemical method.
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Affiliation(s)
- Liu Shi
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shuo Li
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xian Li
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Coal Clean Conversion and Chemical Process Autonomous Region, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830000, China.
| | - Bing Peng
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhenzhong Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hongyun Hu
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guangqian Luo
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Yao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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Kaunda JS, Liu J, Xu Y, Chen Y, Yue C, Zhang X, Zhang R, Amin M, Xiao W, Li H, Li X. Constituents from leaves of Macaranga hemsleyana. CHINESE HERBAL MEDICINES 2024; 16:481-486. [PMID: 39072199 PMCID: PMC11283217 DOI: 10.1016/j.chmed.2023.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/05/2023] [Accepted: 03/27/2023] [Indexed: 07/30/2024] Open
Abstract
Objective To study constituents of the leaves of Macaranga hemsleyana, and evaluate their inhibitory effects against NOD-like receptor thermal protein domain associated protein 3 (NLRP3) inflammasome activation, and antiproliferative activity. Methods The constituents were isolated and purified by column chromatography on MCI gel CHP20P/P120, silica gel, Sephadex LH-20, and HPLC. The structures of compounds were determined by 1D, 2D NMR, and HR-ESI-MS data. The inhibitory effect of compounds on inflammasome activation was determined by lactate dehydrogenase (LDH) procedure. The antiproliferative activity was evaluated using MTT assay. Results The study led to the isolation of 23 compounds, including one new compound, identified as (2Z)-3-[4-(β-D-glucopyranosyloxy)-2'-hydroxy-5'-methoxyphenyl]-2-propenoic acid (1), together with 22 known compounds recognized as 1,4-dihydro-4-oxo-3-pyridinecarbonitrile (2), methyl 4-methoxynicotinate (3), 4-methoxynicotinonitrile (4), 1-(3-O-β-D-glucopyranosyl-4,5-dihydroxyphenyl)-ethanone (5), neoisoastilbin (6), isoastilbin (7), aromadendrin (8), neoastilbin (9), astilbin (10), quercitrin (11), neoschaftoside (12), apigenin 6,8-bis-C-α-L-arabinoside (13), vitexin (14), bergenin (15), scopoletin (16), glucopyranoside salicyl (17), koaburside (18), benzyl β-D-glucoside (19), icariside B5 (20), roseoside (21), loliolide (22), and adenosine (23). The tested compounds did not show LDH inhibition nor antiproliferative activity. Conclusion Compound 1 was a new glycoside. Compounds 2 and 3 were obtained for the first time from natural source. The 22 known compounds constituted of alkaloids (2-4, 23), phenolics (5, 15, 17, 18), flavonoids (6-14), coumarin (16), benzyl glycoside (19), and norsesquiterpenes (20-22). All the compounds, 1-23, were revealed from M. hemsleyana for the first time. This is the initial uncovering of molecules 1-10, 12, 13, 17-19, and 23 from the genus Macaranga. The isolated compounds, 11, 14-16, and 20-22 established taxonomic classification of M. hemsleyana in Euphorbiaceae family. Flavonoids were outstanding as chemosystematic markers of Macaranga genus.
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Affiliation(s)
- Joseph Sakah Kaunda
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Jia Liu
- Yunnan Key Laboratory of Pharmacology for Natural Products, Haiyuan College, Kunming Medical University, Kunming 650500, China
| | - Yaojun Xu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Yuansi Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Chenfang Yue
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Xingjie Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Ruihan Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Muhammad Amin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Weilie Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Hongliang Li
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
| | - Xiaoli Li
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Provincial Center for Research & Development of Natural Products, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Pharmacy, School of Medicine, Chemical Science and Technology, Yunnan University, Kunming 650500, China
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Polozsányi Z, Galádová H, Kaliňák M, Jopčík M, Kaliňáková B, Breier A, Šimkovič M. The Antimicrobial Effects of Myrosinase Hydrolysis Products Derived from Glucosinolates Isolated from Lepidium draba. PLANTS (BASEL, SWITZERLAND) 2024; 13:995. [PMID: 38611524 PMCID: PMC11013450 DOI: 10.3390/plants13070995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/26/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024]
Abstract
Lepidium draba (hoary cress) is a perennial plant belonging to the Brassicaceae family that produces two dominant glucosinolates (GLSs): glucoraphanin (GRN) and sinalbin (SBN). They represent the stored form, which is converted upon the myrosinase (Myr) hydrolysis activity to active compounds, mainly isothiocyanates (ITCs) such as sulforaphane (SFN) or p-hydroxybenzyl isothiocyanate (pHBITC). Research on ITCs that have proven anticancer, antimicrobial, and chemoprotective properties is usually conducted with pure commercially available compounds. However, these are chemically reactive, making it difficult to use them directly for preventive purposes in dietary supplements. Efforts are currently being made to prepare dietary supplements enriched with GLS and/or Myr. In this study, we report a simple but efficient chromatographic procedure for the isolation and purification of GLSs from MeOH extract from hoary cress based on a combination of ion exchange and gel permeation chromatography on DEAE-Sephadex A-25 and Sephadex LH-20. To obtain the Myr required for efficient hydrolysis of GLSs into antibacterial ITCs, we developed a rapid method for its extraction from the seeds of Lepidium sativum (garden cress). The yields of GLSs were 22.9 ± 1.2 mg GRN (purity 96%) and 10.4 ± 1.1 mg SBN (purity 92%) from 1 g of dry plant material. Both purified GLSs were used as substrates for the Myr. Analysis of the composition of hydrolysis products (HPs) revealed differences in their hydrolysis rates and in the degree of conversion from GLSs to individual ITCs catalyzed by Myr. When GRNs were cleaved, SFNs were formed in an equimolar ratio, but the formation of pHBITCs was only half that of cleaved SBNs. The decrease in pHBITC content is due to its instability compared to SFN. While SFN is stable in aqueous media during the measurement, pHBITC undergoes non-enzymatic hydrolysis to p-hydroxybenzyl alcohol and thiocyanate ions. Testing of the antimicrobial effects of the HPs formed from GRN by Myr under premix or in situ conditions showed inhibition of the growth of model prokaryotic and eukaryotic microorganisms. This observation could serve as the jumping-off point for the design of a two-component mixture, based on purified GLSs and Myr that is, usable in food or the pharmaceutical industry in the future.
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Affiliation(s)
- Zoltán Polozsányi
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Helena Galádová
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Michal Kaliňák
- Central Laboratories, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Martin Jopčík
- Institute of Plant Genetics and Biotechnology, Plant Science and Biodiversity Center, Slovak Academy of Sciences, Akademická 969, 949 01 Nitra, Slovakia
| | - Barbora Kaliňáková
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Albert Breier
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská Cesta 9, 845 05 Bratislava, Slovakia
| | - Martin Šimkovič
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
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Dallali D, Fakhfakh J, Paris C, Hamden K, Varbanov M, Allouche N. Fructooligosaccharides from Cynoglossum tubiflorus: Effect of the molecular size on their antidiabetic activity in high-fat diet and alloxan induced diabetic rats. Bioorg Chem 2024; 143:107100. [PMID: 38211550 DOI: 10.1016/j.bioorg.2024.107100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/22/2023] [Accepted: 01/02/2024] [Indexed: 01/13/2024]
Abstract
The use of acetylation followed by silica gel column purification allowed the isolation of eight fructooligosaccharides (FOS) from the ethanol extract of Cynoglossum tubiflorus roots. Each FOS was identified by analyzing its FT-IR, HRMS/MS and NMR data, including 1H, 13C and 2D NMR HH COSY, HMBC and NOESY. In diabetic rats treated with a series of FOS from Glc-(Fru)3 to Glc-(Fru)7, a significant inhibition of intestinal α-amylase was observed. This activity increases proportionally with the FOS molecular size. It was found that they delay the absorption of total cholesterol (TC), ldl-cholesterol (LDL-C) and increase HDL-cholesterol (HDL-C) in a molecular size-dependent manner. This inhibitory effect on the activity of the digestive enzyme causes a significant (p < 0.05) reduction in the level of glucose in the blood as an anti-diabetic action. The ethanolic extract (E.E) exerts a significant effect against α-amylase as well as antihyperglycemic and antihyperlipidemic actions, while its acetylation suppresses these effects. Therefore, this study demonstrates for the first time that pure FOS act as an efficient agent in preventing hyperglycemia and hyperlipidemia and that this action evolves in the same manner with their molecular size.
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Affiliation(s)
- Dhouha Dallali
- Laboratory of Organic Chemistry LR17ES08, Natural Substances Team, Faculty of Sciences of Sfax, University of Sfax, P.B.1171, Sfax 3000, Tunisia
| | - Jawhar Fakhfakh
- Laboratory of Organic Chemistry LR17ES08, Natural Substances Team, Faculty of Sciences of Sfax, University of Sfax, P.B.1171, Sfax 3000, Tunisia.
| | - Cédric Paris
- Laboratory of Biomolecule Engineering (LIBio), Lorraine University, 2 Avenue de la Foret de Haye -TSA, Vandoeuvre Cedex 40602 54518, France
| | - Khaled Hamden
- Laboratory of Bioresources: Integrative Biology and Exploiting, Higher Institute of Biotechnology of Monastir, University of Monastir, Tunisia
| | - Mihayl Varbanov
- L2CM, Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), F-54000 Nancy, France
| | - Noureddine Allouche
- Laboratory of Organic Chemistry LR17ES08, Natural Substances Team, Faculty of Sciences of Sfax, University of Sfax, P.B.1171, Sfax 3000, Tunisia
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8
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Idowu O, Sukandar ER, Nguyen DV, Mulya F, Parasuk V, Wonganan P, Chavasiri W, Thiraphibundet P. Two new rotenoid glycosides from the rhizomes of Stemona curtisii Hook. f. Nat Prod Res 2024:1-11. [PMID: 38189341 DOI: 10.1080/14786419.2023.2301474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/28/2023] [Indexed: 01/09/2024]
Abstract
Two new rotenoid glycosides named stemonal 11-O-β-D-glucopyranoside and 6-O-methylstemonal 11-O-β-D-glucopyranoside together with ten known metabolites were isolated from the rhizomes of Stemona curtisii. The chemical structures of the new compounds were elucidated based on the analysis of their 1D and 2D NMR and HRESIMS, while the sugar unit and absolute configuration were determined by chemical hydrolysis and ECD analysis. Among the tested compounds for anti-α-glucosidase assay, stemonal showed an inhibitory effect (IC50 = 38.67 µM), which is 2.4-fold more potent than acarbose. Cytotoxic evaluation against the lung adenocarcinoma A549 cell line indicated that none of the compounds were strongly active to suppress the cancer cell growth at 100 µM. This work describes the occurrence of rotenoids bearing a sugar moiety, which are reported for the first time in the genus Stemona. The isolated compound's α-glucosidase inhibitory potential provides insight for further investigation of natural rotenoids as anti-diabetic agents.
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Affiliation(s)
- Olusola Idowu
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Edwin R Sukandar
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Duy Vu Nguyen
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Fadjar Mulya
- Department of Engineering, Faculty of Advanced Technology and Multidiscipline, Universitas Airlangga, Surabaya, Indonesia
| | - Vudhichai Parasuk
- Center of Excellence in Computational Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Piyanuch Wonganan
- Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Pattara Thiraphibundet
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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Kabbashi AS, Sattar MA, Aamer M, Siddiqui NN, Kamran M, Fayaz A, Jahan H, Khan FA, Wang Y. Clerodane Furanoditerpenoids from Tinospora bakis (A.Rich.) Miers (Menispermaceae). Molecules 2023; 29:154. [PMID: 38202737 PMCID: PMC10780120 DOI: 10.3390/molecules29010154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/13/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
Tinospora bakis (A.Rich.) Miers (Menispermaceae) has traditionally been used to alleviate headaches, rheumatism, mycetoma, and diabetes, among others. Despite its extensive use, the active components of the plant have never been investigated. In this work, a series of furanoditerpenoids (1-18) and five compounds from other classes (19-23) were isolated from T. bakis. Notably, two new compounds were discovered and named: tinobakisin (1) and tinobakiside (10). Their molecular structures were elucidated with NMR, MS, UV, IR, and ECD spectra. Additionally, known compounds (2-9 and 11-23) were corroboratively identified through spectral comparisons with previously reported data, while highlighting and addressing some inaccuracies in the prior literature. Remarkably, compounds 6, 7, 13, and 17 exhibited a superior anti-glycation effect, outperforming established agents like rutin and quercetin in a lab model of protein glycation with glucose. The overall findings suggest that furanoditerpenoids play a crucial role in the antidiabetic properties of T. bakis. This research marks the first comprehensive phytochemical investigation of T. bakis, opening the door for further investigation into furanoditerpenoids and their biological mechanisms.
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Affiliation(s)
- Ahmed Saeed Kabbashi
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
- Department of Microbiology, Faculty of Pure and Applied Sciences, International University of Africa, Khartoum 12223, Sudan
| | - Maazah Abdul Sattar
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
| | - Muhammad Aamer
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
| | - Nimra Naz Siddiqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (N.N.S.); (H.J.)
| | - Muhammad Kamran
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
| | - Aneela Fayaz
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
| | - Humera Jahan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (N.N.S.); (H.J.)
| | - Farooq-Ahmad Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
- Third World Center (TWC) for Chemical Sciences, International Center for Chemical & Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Yan Wang
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (A.S.K.); (M.A.S.); (M.A.); (M.K.); (A.F.)
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10
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Doan TP, Zhang M, Park EJ, Ponce-Zea JE, Mai VH, Cho HM, Pham HTT, Oh WK. Oxindole and Benzoxazinone Alkaloids from the Seeds of Persea americana (Avocado) and Their SIRT1 Stimulatory Activity. JOURNAL OF NATURAL PRODUCTS 2023; 86:2270-2282. [PMID: 37792632 DOI: 10.1021/acs.jnatprod.3c00214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Persea americana Mill. (Lauraceae), commonly known as avocado, is a well-known food because of its nutrition and health benefits. The seeds of avocado are major byproducts, and thus their phytochemicals and bioactivities have been of interest for study. The chemical components of avocado seeds were investigated by using UPLC-qTOF-MS/MS-based molecular networking, resulting in the isolation of seven new oxindole alkaloids (1-7) and two new benzoxazinone alkaloids (8 and 9). The chemical structures of the isolated compounds were identified by the analysis of NMR data in combination with computational approaches, including NMR and ECD calculations. Bioactivities of the isolated compounds toward silent information regulation 2 homologue-1 (SIRT1) in HEK293 cells were assessed. The results showed that compound 1 had the most potent effect on SIRT1 activation with an elevated NAD+/NADH ratio with potential for further investigation as an anti-aging agent.
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Affiliation(s)
- Thi-Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Mi Zhang
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun-Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jorge-Eduardo Ponce-Zea
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Van-Hieu Mai
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo-Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | | | - Won-Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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11
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Mohamed EM, H Elmaidomy A, Alaaeldin R, Alsenani F, Altemani FH, Algehainy NA, Alanazi MA, Bagalagel A, Althagafi A, Elrehany MA, Abdelmohsen UR. Anti-Alzheimer Potential of a New (+)-Pinitol Glycoside Isolated from Tamarindus indica Pulp: In Vivo and In Silico Evaluations. Metabolites 2023; 13:732. [PMID: 37367890 DOI: 10.3390/metabo13060732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/28/2023] Open
Abstract
Tamarindus indica Linn (tamarind, F. Leguminosae) is one of the most widely consumed edible fruits in the world. Phytochemical investigation of tamarind pulp n-butanol fraction yielded one new (+)-pinitol glycoside compound 1 (25% w/w), and 1D, 2D NMR, and HRESIMS investigation were used to confirm the new compound's structure. (+)-Pinitol glycoside showed anti-Alzheimer potential that was confirmed in prophylactic and treatment groups by decreasing time for the T-maze test; decreased TAO, brain and serum AChE, MDA, tau protein levels, and β amyloid peptide protein levels; and increasing GPX, SOD levels, and in vivo regression of the neurodegenerative features of Alzheimer's dementia in an aluminum-intoxicated rat model. The reported molecular targets for human Alzheimer's disease were then used in a network pharmacology investigation to examine their complex interactions and identify the key targets in the disease pathogenesis. An in silico-based analysis (molecular docking, binding free energy calculation (ΔGBinding), and molecular dynamics simulation) was performed to identify the potential targets for compound 1. The findings of this study may lead to the development of dietary supplements for the treatment of Alzheimer's disease.
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Affiliation(s)
- Esraa M Mohamed
- Department of Pharmacognosy, Faculty of Pharmacy, MUST, Giza 12566, Egypt
| | - Abeer H Elmaidomy
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Rania Alaaeldin
- Department of Biochemistry, Faculty of Pharmacy, Deraya University, University Zone, New Minia 61111, Egypt
| | - Faisal Alsenani
- Department of Pharmacognosy, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Faisal H Altemani
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Naseh A Algehainy
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Mohammad A Alanazi
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Alaa Bagalagel
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Abdulhamid Althagafi
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mahmoud A Elrehany
- Department of Biochemistry, Faculty of Pharmacy, Deraya University, University Zone, New Minia 61111, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, 7 Universities Zone, New Minia 61111, Egypt
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12
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Siebe HS, Sardjan AS, Maßmann SC, Flapper J, van den Berg KJ, Eisink NNHM, Kentgens APM, Feringa BL, Kumar A, Browne WR. Formation of substituted dioxanes in the oxidation of gum arabic with periodate. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2023; 25:4058-4066. [PMID: 37223211 PMCID: PMC10202368 DOI: 10.1039/d2gc04923f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 04/24/2023] [Indexed: 05/25/2023]
Abstract
Renewable polysaccharide feedstocks are of interest in bio-based food packaging, coatings and hydrogels. Their physical properties often need to be tuned by chemical modification, e.g. by oxidation using periodate, to introduce carboxylic acid, ketone or aldehyde functional groups. The reproducibility required for application on an industrial scale, however, is challenged by uncertainty about the composition of product mixtures obtained and of the precise structural changes that the reaction with periodate induces. Here, we show that despite the structural diversity of gum arabic, primarily rhamnose and arabinose subunits undergo oxidation, whereas (in-chain) galacturonic acids are unreactive towards periodate. Using model sugars, we show that periodate preferentially oxidises the anti 1,2-diols in the rhamnopyranoside monosaccharides present as terminal groups in the biopolymer. While formally oxidation of vicinal diols results in the formation of two aldehyde groups, only traces of aldehydes are observed in solution, with the main final products obtained being substituted dioxanes, both in solution and in the solid state. The substituted dioxanes form most likely by the intramolecular reaction of one aldehyde with a nearby hydroxyl group, followed by hydration of the remaining aldehyde to form a geminal diol. The absence of significant amounts of aldehyde functional groups in the modified polymer impacts crosslinking strategies currently attempted in the preparation of renewable polysaccharide-based materials.
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Affiliation(s)
- Harmke S Siebe
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Andy S Sardjan
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Sarina C Maßmann
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Jitte Flapper
- Akzo Nobel Decorative Coatings BV Rijksstraatweg 31 Sassenheim 2171 AJ The Netherlands
| | | | - Niek N H M Eisink
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Arno P M Kentgens
- Magnetic Resonance Research Center, Institute for Molecules and Materials, Radboud University 6525 AJ Nijmegen The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Akshay Kumar
- Magnetic Resonance Research Center, Institute for Molecules and Materials, Radboud University 6525 AJ Nijmegen The Netherlands
- Dutch Polymer Institute (DPI) P.O. Box 902 5600 AX Eindhoven The Netherlands
| | - Wesley R Browne
- Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
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13
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Cui S, Wei X, Chen X, Xie Y. Investigation of chemical linkages between lignin and carbohydrates in cultured poplar cambium tissues via double isotope labeling. Int J Biol Macromol 2023; 231:123250. [PMID: 36639086 DOI: 10.1016/j.ijbiomac.2023.123250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/12/2023]
Abstract
Lignin precursor labeled with 13C (coniferin-13Cα), carbohydrate precursor labeled with D (6,6-D2-glucose) were put into cambium tissue stripped from a growing poplar. The tissue was further cultured in vitro for 18d. Then, the isotopic abundance was determined. The results showed that the labeled precursors could be normally involved in the formation of new xylem. The labeled new xylem tissue was fractionated by ionic liquid DMSO/TBAH system to obtain two components: glucan-lignin complex (GL) and xylan-lignin complex (XL). The X-ray diffraction (XRD) results indicated that the crystalline form of cellulose in the GL component was transformed from type I to type II after the ionic liquid separation. Then the GL and XL were purified and modified by enzymatic and chemical methods, and their structures were elucidated by nuclear magnetic resonance (NMR) spectroscopy. The results showed that lignin subunits in the cultured tissues were mainly connected by β-5 and β-O-4 linkages, of which the β-O-4 substructure unit predominated. Lignin and carbohydrates were mainly connected by acetal bonds, ether bonds, and ester bonds. Combined with the carbohydrate composition and XRD analysis results, the GL components also confirmed the existence of acetal bonds, ester bonds and ether bonds between lignin and cellulose.
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Affiliation(s)
- Sheng Cui
- Research Institute of Pulp & Paper Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Xin Wei
- Research Institute of Pulp & Paper Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Xudong Chen
- Research Institute of Pulp & Paper Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yimin Xie
- Research Institute of Pulp & Paper Engineering, Hubei University of Technology, Wuhan 430068, China; Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China.
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14
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Fedorov SV, Krivdin LB. Computational NMR of carbohydrates: 1. Glucopyranoses. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2023; 61:162-168. [PMID: 36226671 DOI: 10.1002/mrc.5320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/28/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
A high-level calculation of 1 H and 13 C NMR chemical shifts of α- and β-d-glucopyranoses is carried out at the DFT level with taking into account their conformational composition to reveal the most effective computational protocols. A number of dedicated DFT functionals in combination with Jensen's pcS-n (n = 0-4) family of basis sets were applied to evaluate the most reliable combination. It was found that BHandHLYP/pcS-2 provided the most accurate and reliable computational protocol. Based on the performed calculations, the established computational protocol is generally recommended for the calculation of 1 H and 13 C NMR chemical shifts of a wide series of carbohydrates.
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Affiliation(s)
- Sergei V Fedorov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
| | - Leonid B Krivdin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
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15
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J N C, Mallajosyula SS. Impact of Polarization on the Ring Puckering Dynamics of Hexose Monosaccharides. J Chem Inf Model 2023; 63:208-223. [PMID: 36475659 DOI: 10.1021/acs.jcim.2c01286] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Analysis of crystal structures of hexose monosaccharides α-d-mannose (α-MAN), β-d-mannose (β-MAN), α-d-glucose (α-GLC), β-d-glucose (β-GLC), α-d-galactose (α-GAL), β-d-galactose (β-GAL), α-d-altrose (α-ALT), β-d-altrose (β-ALT), α-d-idose (α-IDO), and β-d-idose (β-IDO) reveals that the monosaccharide ring adopts multiple ring conformations. These ring conformations can be broadly classified as chair, half-chair, envelope, boat, and skew-boat conformations. The ability of the monosaccharide ring to adopt multiple conformations has been closely tied with their bioactivity. However, it has been difficult to capture the dynamic information of these conformations from experimental studies. Even from simulations, capturing these different conformations is challenging because of the energy barriers involved in the transitions between the stable 4C1 and 1C4 chair forms. In this study, we analyze the influence of the polarizable force field on the ring dynamics of five major types of unsubstituted aldohexoses─glucose, mannose, galactose, altrose, and idose─and their anomers. We simulate microsecond trajectories to capture the influence of the CHARMM36 additive and polarizable carbohydrate force fields on the ring dynamics. The microsecond trajectories allow us to comment on the issues associated with equilibrium molecular dynamics simulations. Further, we use the extended system adaptive biasing force (eABF) method to compare the conformational sampling efficiencies of the additive and polarizable force fields. Our studies reveal that inclusion of polarization enhances the sampling of ring conformations and lowers the energy barriers between the 4C1 and 1C4 conformations. Overall, the CHARMM36 additive force field is observed to be rigid and favor the 4C1 conformations. Although the inclusion of polarizability results in enhancing ring flexibility, we observe sampling that does not agree with experimental results, warranting a revision of the polarizable Drude parameters.
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Affiliation(s)
- Chythra J N
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat382355, India
| | - Sairam S Mallajosyula
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat382355, India
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16
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Inhibition of the NLRP3 Inflammasome by a Quercus Serrata Extract and Isolation of the Component Compounds for the Treatment of Arthritis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:4428269. [PMID: 36619197 PMCID: PMC9812605 DOI: 10.1155/2022/4428269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 05/16/2022] [Accepted: 05/19/2022] [Indexed: 12/29/2022]
Abstract
Quercus serrata belongs to the Fagaceae family. There are 600 known species of Quercus worldwide. Q. serrata is distributed nationally in Korea, Japan, and China and grows to a height of 10-15 m. It exhibits a light grey bark with longitudinal furrows; the leaves are 6-12 cm long and 2.5-5 cm wide. The Quercus genus reportedly exhibits several types of bioactivity, including antioxidant, anti-inflammatory, antifungal, antimicrobial, and anticancer activity. Additionally, it has been reported that Quercus produces diverse phytochemicals, including tannins, flavonoids, and triterpenoids. Herein, we describe the column chromatographic isolation of five compounds from a Q. serrata extract. The compounds included caffeic acid (1), myricetin-3-O-cellobioside (2), phloroglucinol (3), (S)-2,3-HHDP-D-glucopyranoside (4), and pedunculagin (5). We assessed the 2,2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging activity, antioxidant activity, NLR family pyrin domain-containing 3 (NLRP3) inflammasome (including NLRP3, ASC, and caspase-1) inhibitory effects, and collagenase inhibition activity of the Q. serrata extract and its constituent compounds. Our results indicated that the Q. serrata extract and the isolated constituent compounds showed inhibitory activity with reference to nitric oxide production, inflammasome component expression, and collagenase activity. Our findings imply that the Q. serrata extract and the isolated constituent compounds are potential candidates for the treatment of inflammatory diseases such as arthritis.
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17
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Benzothioate Glycoside from a terrestrial Streptomyces sp. TBRC 11511 from Thailand. J Antibiot (Tokyo) 2022; 75:583-588. [DOI: 10.1038/s41429-022-00554-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/01/2022] [Accepted: 08/02/2022] [Indexed: 11/08/2022]
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18
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Smart IM-MS and NMR study of natural diastereomers: the study case of the essential oil from Senecio transiens. Anal Bioanal Chem 2022; 414:6695-6705. [DOI: 10.1007/s00216-022-04232-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/09/2022] [Accepted: 07/13/2022] [Indexed: 11/25/2022]
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19
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Palivec V, Pohl R, Kaminský J, Martinez-Seara H. Efficiently Computing NMR 1H and 13C Chemical Shifts of Saccharides in Aqueous Environment. J Chem Theory Comput 2022; 18:4373-4386. [PMID: 35687789 DOI: 10.1021/acs.jctc.2c00127] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Determining the structure of saccharides in their native environment is crucial to understanding their function and more accurately targeting their utilization. Nuclear magnetic resonance observables such as the nuclear Overhauser effect or spin-spin coupling constants are routinely utilized to study saccharides in their native water environment. However, while highly sensitive to the local environment, chemical shifts are mostly overlooked, despite being commonly measured for compounds identification. Although chemical shifts carry considerable structural information, their direct association with structure is notoriously difficult. This is mostly due to the similarity in the chemical nature of most saccharides causing similar physicochemical environments close to sugar C and H atoms, resulting in comparable chemical shifts. The rise of computational power allows one to compute reliable chemical shifts and use them to determine atomistic details of these sugars in solution. However, any prediction is severely limited by the computational protocol used and its accuracy. In this work, we studied a set of 31 saccharides on which we evaluated various computational protocols to calculate the total number of 375 1H and 327 13C chemical shifts of sugars in an aqueous environment. Our study proposes two cost-effective protocols for simulating 1H and 13C chemical shifts that we recommend for further use. These protocols can help with the interpretation of experimental spectra, but we also show that they are also capable of structure prediction independently. This is possible because of the low mean absolute deviations of calculated shifts from the experiment (0.06 ppm for 1H and 1.09 ppm for 13C). We explore different solvation methods, basis sets, and optimization schemes to reach such accuracy. A correct sampling of the conformation phase space of flexible sugar molecules is also key to obtaining accurately converged theoretical chemical shifts. The linear regression method was applied to convert the calculated isotropic nuclear magnetic shielding constants to simulated chemical shifts comparable with the experiment. The achieved level of accuracy can help in utilizing chemical shifts for elucidating the 3D atomistic structure of saccharides in aqueous solutions. All linear regression parameters obtained on our extensive set of sugars for all the tested protocols can be reutilized in future works.
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Affiliation(s)
- Vladimír Palivec
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo námĕstí 542/2, Prague 6 CZ166 10, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo námĕstí 542/2, Prague 6 CZ166 10, Czech Republic
| | - Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo námĕstí 542/2, Prague 6 CZ166 10, Czech Republic
| | - Hector Martinez-Seara
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo námĕstí 542/2, Prague 6 CZ166 10, Czech Republic
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20
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Viitaja T, Raitanen JE, Hynynen A, Moilanen J, Svedström K, Paananen RO, Ekholm FS. On the importance of chain branching in tear film lipid layer wax and cholesteryl esters. Colloids Surf B Biointerfaces 2022; 214:112429. [PMID: 35278859 DOI: 10.1016/j.colsurfb.2022.112429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 11/30/2022]
Abstract
The tear film lipid layer (TFLL) is important to the maintenance of ocular surface health. Surprisingly, information on the individual roles of the myriad of unique lipids found therein is limited. The most abundant lipid species are the wax esters (WE) and cholesteryl esters (CE), and, especially their branched analogs. The isolation of these lipid species from the TFLL has proved to be tedious, and as a result, insights on their biophysical profiles and role in the TFLL is currently lacking. Herein, we circumvent these issues by a total synthesis of the most abundant iso-methyl branched WEs and CEs found in the TFLL. Through a detailed characterization of the biophysical properties, by the use of Langmuir monolayer and wide-angle X-ray scattering techniques, we demonstrate that chain branching alters the behavior of these lipid species on multiple levels. Taken together, our results fill an important knowledge gap concerning the structure and function of the TFLL on the whole.
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Affiliation(s)
- Tuomo Viitaja
- Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki FI-00014, Finland; Ophthalmology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 8, Helsinki FI-00290, Finland
| | - Jan-Erik Raitanen
- Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki FI-00014, Finland
| | - Antti Hynynen
- Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki FI-00014, Finland
| | - Jukka Moilanen
- Ophthalmology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 8, Helsinki FI-00290, Finland
| | - Kirsi Svedström
- Department of Physics, University of Helsinki, P.O. Box 64, Helsinki FI-00014, Finland
| | - Riku O Paananen
- Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki FI-00014, Finland; Ophthalmology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 8, Helsinki FI-00290, Finland.
| | - Filip S Ekholm
- Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki FI-00014, Finland.
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21
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Di Lecce R, Galarza Pérez M, Mangoni A, Çiçek SS, Sönnichsen FD, Evidente A, Zidorn C. Sesquiterpenoids from Leontodon tenuiflorus (Asteraceae, Cichorieae): First record of a hypocretenoid from Leontodon section Asterothrix. BIOCHEM SYST ECOL 2022. [DOI: 10.1016/j.bse.2022.104408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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22
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Vuillemin ME, Husson E, Laclef S, Jamali A, Lambertyn V, Pilard S, Cailleu D, Sarazin C. Improving the environmental compatibility of enzymatic synthesis of sugar-based surfactants using green reaction media. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Kim DH, Ham SL, Khan Z, Kim SY, Choi SU, Kim CS, Lee KR. Terpenoids from Glechoma hederacea var. longituba and their biological activities. Beilstein J Org Chem 2022; 18:555-566. [PMID: 35651699 PMCID: PMC9127242 DOI: 10.3762/bjoc.18.58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 05/06/2022] [Indexed: 01/18/2023] Open
Abstract
Glechoma hederacea var. longituba (common name: ground ivy) has been used for the treatment of asthma, bronchitis, cholelithiasis, colds, and inflammation. In the present study, three new sesquiterpene glycosides (1–3), two new diterpene glycosides (4 and 5), and four known compounds (6–9) were isolated from its MeOH extract. A structure elucidation was performed for the five new compounds (1–5) using 1D and 2D NMR, HRESIMS, DP4+ and ECD calculations, and chemical methods. All the isolates (1–9) were assessed for their antineuroinflammatory activities on nitric oxide (NO) production in lipopolysaccharide (LPS)-activated BV-2 cells, nerve growth factor (NGF) secretion stimulation activities in C6 glioma cells, and cytotoxic activities against four human cancer cell lines (A549, SK-OV-3, SK-MEL-2, and HCT15). Compounds 2 and 5–7 exhibited inhibitory effects on the NO production with IC50 values of 52.21, 47.90, 61.61, and 25.35 μM, respectively. Compound 5 also exhibited a significant stimulating effect on NGF secretion (122.77 ± 8.10%). Compound 9 showed potent cytotoxic activity against SK-OV-3 (IC50 = 3.76 μM) and SK-MEL-2 (IC50 = 1.48 μM) cell lines, while 7 displayed a strong cytotoxic activity against the SK-MEL-2 (IC50 = 9.81 μM) cell line.
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Affiliation(s)
- Dong Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Song Lim Ham
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Zahra Khan
- College of Pharmacy, Gachon University #191, Hambakmeoro, Yeonsu-gu, Incheon 21936, Republic of Korea
- Gachon Institute of Pharmaceutical Science, Gachon University, Incheon 21936, Republic of Korea
| | - Sun Yeou Kim
- College of Pharmacy, Gachon University #191, Hambakmeoro, Yeonsu-gu, Incheon 21936, Republic of Korea
- Gachon Institute of Pharmaceutical Science, Gachon University, Incheon 21936, Republic of Korea
| | - Sang Un Choi
- Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Chung Sub Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Biopharmaceutical Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kang Ro Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Ayoolu OS, Ogbole OO, Ajaiyeoba EO, Nchiozem-Ngnitedem VA, Demissie TB, Elbadawi M, Efferth T, Bedane KG, Spiteller M. Flavanols from Tetrapleura tetraptera with cytotoxic activities. Fitoterapia 2022; 160:105206. [DOI: 10.1016/j.fitote.2022.105206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/04/2022] [Accepted: 05/04/2022] [Indexed: 11/04/2022]
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Ullah Z, Öztürk M, Ertaş A, Wahab AT, Ben Mansour R, Iqbal Choudhary M. Insight into isolation and elucidation of cytotoxic ergostanoids from the mushroom Sarcosphaera crassa (Santi) Pouzar: An edible mushroom. Steroids 2022; 181:108990. [PMID: 35218860 DOI: 10.1016/j.steroids.2022.108990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 11/22/2022]
Abstract
Sarcosphaera crassa is a mushroom consumed in Europe and Anatolia after being cooked well. The cytotoxic activity of the extracts of unbaked S. crassa against MCF7, HT29, HeLa cancer cell lines and toxicity against PDF fibroblast healthy cell lines were studied using MTT assay. Acetone and methanol extracts of the mushroom exhibited significant cytotoxic activity. Further investigation of cytotoxic extracts afforded two new fatty acid sterols (1-2), a new ergosterol glycoside (4), and seven known compounds, including a fatty acid sterol (3), a steroid glycoside (5), two ergostanoids (6-7) and three sugars (8-10). These compounds were identified as brassicasteryl heptadecanoate (1), brassicasteryl palmitoleate (2), brassicasteryl linoleate (3), brassicasterol β-ᴅ-xylofuranoside (4), brassicasterol β-ᴅ-glucoside (5), brassicasterol (6), ergosterol-endoperoxide (7), mannitol (8), erythritol (9) and turanose (10). Among them, 7 exhibited a moderate cytotoxic activity against HeLa (IC50: 70.1 ± 2.0 µg/mL) and high activity against HT29 (IC50: 38.8 ± 0.9 µg/mL), and MCF7 (IC50: 62.9 ± 1.3 µg/mL) cancer cell lines. Compounds 4, 5, and 6 also exhibited significant cytotoxic activity against HT29 and MCF7. Moreover, all compounds exhibited weak toxicity against PDF healthy cell lines. This study indicates the potential use of Sarcosphaera crassa as a natural source of cytotoxic ergostanoids, which can be considered a dietary supplement for cancer prevention.
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Affiliation(s)
- Zain Ullah
- Department of Chemistry, Faculty of Sciences, Muğla Sıtkı Koçman University, 48121 Kötekli, Muğla Turkey.
| | - Mehmet Öztürk
- Department of Chemistry, Faculty of Sciences, Muğla Sıtkı Koçman University, 48121 Kötekli, Muğla Turkey.
| | - Abdulselam Ertaş
- Department of Pharmacognosy, Faculty of Pharmacy, Dicle University, 21280 Diyarbakir, Turkey
| | - Atia-Tul Wahab
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Riadh Ben Mansour
- Laboratory of Cell Culture, Biotechnology Institute, Sfax, Tunisia, Ecole Nationale d'Ingénieurs de Sfax Route de la Soukra km 4 - 3038 Sfax, Laboratory of Plant Biotechnology, Faculty of Science, University of Sfax, Tunisia
| | - M Iqbal Choudhary
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan; H. E. J. Research Institute of Chemistry, Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi 75270, Pakistan
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Xiao Y, Lee IS. Effects of Microbial Transformation on the Biological Activities of Prenylated Chalcones from Angelica keiskei. Foods 2022; 11:foods11040543. [PMID: 35206019 PMCID: PMC8871312 DOI: 10.3390/foods11040543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/09/2022] [Accepted: 02/11/2022] [Indexed: 11/25/2022] Open
Abstract
Microbial transformation is an alternative method for structural modification. The current study aimed at application of microbial transformation for discovering new derivatives and investigating the structure-activity relationship of isobavachalcone (1), 4-hydroxyderricin (2), and xanthoangelol (3) isolated from the herb Angelica keiskei. In the initial screening process, 1–3 were incubated with microbes using a two-stage fermentation method and analyzed through TLC monitoring. The screening results showed that Rhizopus oryzae and Mucor hiemalis were able to transform 1 and 2, respectively. Additionally, M. hiemalis and Mortierella ramanniana var. angulispora were able to transform 3. Following scale-up fermentation, four new (4, 5, 7, and 10) and five known (6, 8, 9, 11, and 12) metabolites were produced. Cytotoxicity of all the compounds (1–12) was investigated using three human cancer cell lines including A375P, HT-29, and MCF-7 by MTT method. Meanwhile, the tyrosinase inhibitory activity of 1–12 was evaluated using l-tyrosine as a substrate. Overall, 1 and 3 displayed the highest cytotoxicity, and 5 and 7 exhibited the most potent tyrosinase inhibitory activity with relatively low cytotoxicity. This allowed us to postulate that the introduction of 4′-O-glucopyranosyl group led to the reduction in cytotoxicity and improvement in tyrosinase inhibitory activity.
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Somteds A, Kanokmedhakul K, Chaiyosang B, Yahuafai J, Laphookhieo S, Phukhatmuen P, Pornpongrungrueng P, Kanokmedhakul S. Cytotoxic and α-glucosidase inhibitory metabolites from twigs and leaves of Phyllanthus mirabilis, a species endemic to limestone mountains. PHYTOCHEMISTRY 2022; 194:113028. [PMID: 34847377 DOI: 10.1016/j.phytochem.2021.113028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 06/13/2023]
Abstract
The first investigation of Phyllanthus mirabilis Müll.Arg. led to the isolation of six undescribed compounds including two tyramine derivatives: phyllatyramines A and B; three butenolide analogues, phyllantenolide, phyllantenocoside-O-gallate and epi-phyllantenocoside-O-gallate; and a flavanonol gallate, (-)-taxifolin-3-O-gallate; as well as two first isolated natural products, phyllatyramine C and phyllantenocoside; together with twenty-three known compounds. Their structures were elucidated by spectroscopic means. ECD spectra of all isolated butenolides were compared and assigned the configurations. Phyllatyramine A displayed weak cytotoxicity against the KB cell line, while phyllatyramines B and C showed weak cytotoxicity against KB and HeLa cell lines. In addition, phyllatyramine B and (-)-taxifolin-3-O-gallate showed more potent α-glucosidase inhibitory activity than the standard acarbose 3.4 and 5.8 fold, respectively.
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Affiliation(s)
- Apisara Somteds
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Boonyanoot Chaiyosang
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Jantana Yahuafai
- Natural Product Research Section, Research Division National Cancer Institute, Bangkok, 10400, Thailand
| | - Surat Laphookhieo
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Piyaporn Phukhatmuen
- Center of Chemical Innovation for Sustainability (CIS), School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Pimwadee Pornpongrungrueng
- Applied Taxonomic Research Center, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
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Wang X, Zhou X, Wang K, Cao X. Structural characterisation and bioactivity of polysaccharides isolated from fermented Dendrobium officinale. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:280-290. [PMID: 34091920 DOI: 10.1002/jsfa.11356] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/26/2021] [Accepted: 06/06/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND A polysaccharide was purified in this study, which was acquired from the fermentation broth of Dendrobium officinale Kimura et Migo. We aimed to investigate the structural features and bioactivity of this polysaccharide. RESULTS The polysaccharide was purified and the main polysaccharide fraction (i.e., DOP-1) was obtained. High-performance gel permeation chromatography (HPGPC) revealed that the molecular weight of DOP-1 was 447.48 kDa. Galactose, glucose and mannose were found to be present in DOP-1 via monosaccharide composition analysis, at a ratio of 1:1.79:6.71. Methylation and nuclear magnetic resonance spectroscopic analysis indicated that the backbone of DOP-1 was →4)-α-d-Glcp-(1 → 4)-α-d-Manp-(1 → 4)-α-d-Manp-(1 → 4,6)-α-d-Manp-(1→, and its repeating units were also preliminarily established. In vitro tests proved that DOP-1 not only protects RAW264.7 macrophages from the cytotoxic effect induced by lipopolysaccharide (LPS), but also inhibits cytokines (i.e., interleukin-6 and tumour necrosis factor-α) induced by LPS. DOP-1 demonstrated good scavenging activity in vitro toward 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radicals, as well as good metal chelating activity. Therefore, DOP-1 has potential antioxidant applications. CONCLUSION The structural characteristics of DOP-1 support its favourable biological activities and lay a strong foundation for further exploration of its structure-activity relationships and activity development, providing experimental data for the development and utilisation of fermentation broth of D. officinale. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Xilai Wang
- School of Food Science and Engineering, University of Hainan, Haikou, China
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, University of Hainan, Haikou, China
| | - Xin Zhou
- School of Food Science and Engineering, University of Hainan, Haikou, China
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, University of Hainan, Haikou, China
| | - Kai Wang
- School of Food Science and Engineering, University of Hainan, Haikou, China
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, China
| | - Xianying Cao
- School of Food Science and Engineering, University of Hainan, Haikou, China
- Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, University of Hainan, Haikou, China
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Cao F, Liang M, Liu J, Liu Y, Renye JA, Qi PX, Ren D. Characterization of an exopolysaccharide (EPS-3A) produced by Streptococcus thermophilus ZJUIDS-2-01 isolated from traditional yak yogurt. Int J Biol Macromol 2021; 192:1331-1343. [PMID: 34673108 DOI: 10.1016/j.ijbiomac.2021.10.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 09/28/2021] [Accepted: 10/08/2021] [Indexed: 11/30/2022]
Abstract
Yak yogurt, one of the naturally fermented dairy products prepared by local herdsmen in the Qinghai-Tibet Plateau, contains a diverse array of microorganisms. We isolated and identified a novel Streptococcus thermophilus strain, ZJUIDS-2-01, from the traditional yak yogurt. We further purified and carried out detailed structural, physiochemical, and bioactivity studies of an exopolysaccharide (EPS-3A) produced by S. thermophilus ZJUIDS-2-01. The weight-average molecular weight (Mw) of EPS-3A was estimated to be 1.38 × 106 Da by High-Performance Gel Permeation Chromatography (HPGPC). The monosaccharide analysis established its composition to be glucose, galactose, N-acetyl-D-galactosamine, and rhamnose in a ratio of 5.2:2.5:6.4:1.0. The molecular structure of EPS-3A was determined by the combination of permethylation analysis, FT-IR, and NMR spectroscopic techniques. The ζ-potential measurements indicated that EPS-3A had a pKa value of ~4.40. The DSC yielded a melting point (Tm) of 80.4 °C and enthalpy change (ΔH) of 578 J/g for EPS-3A, comparable to those of the xanthan gum (XG), a commercial EPS. EPS-3A exhibited better O/W emulsion stability and flocculating capacity than XG. Furthermore, it also demonstrated similar antioxidant activity to XG and promising in vitro antibacterial properties. This work evidenced that EPS-3A derived from S. thermophilus ZJUIDS-2-01 holds the potential for food and industrial applications.
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Affiliation(s)
- Feiwei Cao
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Mingming Liang
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Jianxin Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yu Liu
- College of Life Science, Zhejiang University, Hangzhou 310058, PR China
| | - John A Renye
- Dairy and Functional Foods Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Wyndmoor, PA 19038, USA
| | - Phoebe X Qi
- Dairy and Functional Foods Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Wyndmoor, PA 19038, USA.
| | - Daxi Ren
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China.
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Alexandersson E, Nestor G. Complete 1H and 13C NMR spectral assignment of d-glucofuranose. Carbohydr Res 2021; 511:108477. [PMID: 34784518 DOI: 10.1016/j.carres.2021.108477] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/02/2022]
Abstract
Although d-glucose is the most common sugar in nature, only a few NMR studies have focused on its minor furanose forms, and they have been limited to the anomeric position. Here, complete 1H and 13C NMR spectral analysis of α- and β-d-glucofuranose was performed, including signal assignment, chemical shifts, and coupling constants. Selective and non-selective 1D and 2D NMR experiments were used for the analysis, complemented by spin simulations and iterative spectral analysis.
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Affiliation(s)
- Elin Alexandersson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Gustav Nestor
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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31
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Nakamura S, Nihira T, Kurata R, Nakai H, Funane K, Park EY, Miyazaki T. Structure of a bacterial α-1,2-glucosidase defines mechanisms of hydrolysis and substrate specificity in GH65 family hydrolases. J Biol Chem 2021; 297:101366. [PMID: 34728215 PMCID: PMC8626586 DOI: 10.1016/j.jbc.2021.101366] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 12/02/2022] Open
Abstract
Glycoside hydrolase family 65 (GH65) comprises glycoside hydrolases (GHs) and glycoside phosphorylases (GPs) that act on α-glucosidic linkages in oligosaccharides. All previously reported bacterial GH65 enzymes are GPs, whereas all eukaryotic GH65 enzymes known are GHs. In addition, to date, no crystal structure of a GH65 GH has yet been reported. In this study, we use biochemical experiments and X-ray crystallography to examine the function and structure of a GH65 enzyme from Flavobacterium johnsoniae (FjGH65A) that shows low amino acid sequence homology to reported GH65 enzymes. We found that FjGH65A does not exhibit phosphorolytic activity, but it does hydrolyze kojibiose (α-1,2-glucobiose) and oligosaccharides containing a kojibiosyl moiety without requiring inorganic phosphate. In addition, stereochemical analysis demonstrated that FjGH65A catalyzes this hydrolytic reaction via an anomer-inverting mechanism. The three-dimensional structures of FjGH65A in native form and in complex with glucose were determined at resolutions of 1.54 and 1.40 Å resolutions, respectively. The overall structure of FjGH65A resembled those of other GH65 GPs, and the general acid catalyst Glu472 was conserved. However, the amino acid sequence forming the phosphate-binding site typical of GH65 GPs was not conserved in FjGH65A. Moreover, FjGH65A had the general base catalyst Glu616 instead, which is required to activate a nucleophilic water molecule. These results indicate that FjGH65A is an α-1,2-glucosidase and is the first bacterial GH found in the GH65 family.
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Affiliation(s)
- Shuntaro Nakamura
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan
| | | | - Rikuya Kurata
- Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Hiroyuki Nakai
- Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Kazumi Funane
- Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Yamanashi, Japan
| | - Enoch Y Park
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan; Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan; Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Takatsugu Miyazaki
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan; Department of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan; Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, Japan.
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Chen J, Li L, Zhang X, Wan L, Zheng Q, Xu D, Li Y, Liang Y, Chen M, Li B, Chen Z. Structural characterization of polysaccharide from Centipeda minima and its hypoglycemic activity through alleviating insulin resistance of hepatic HepG2 cells. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104478] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Nazarski RB. Summary of DFT calculations coupled with current statistical and/or artificial neural network (ANN) methods to assist experimental NMR data in identifying diastereomeric structures. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152548] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Krivdin LB. Computational NMR of Carbohydrates: Theoretical Background, Applications, and Perspectives. Molecules 2021; 26:molecules26092450. [PMID: 33922318 PMCID: PMC8122784 DOI: 10.3390/molecules26092450] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/19/2021] [Accepted: 04/19/2021] [Indexed: 12/11/2022] Open
Abstract
This review is written amid a marked progress in the calculation of NMR parameters of carbohydrates substantiated by a vast amount of experimental data coming from several laboratories worldwide. By no means are we trying to cover in the present compilation a huge amount of all available data. The main idea of the present review was only to outline general trends and perspectives in this dynamically developing area on the background of a marked progress in theoretical and computational NMR. Presented material is arranged in three basic sections: (1)-a brief theoretical introduction; (2)-applications and perspectives in computational NMR of monosaccharides; and (3)-calculation of NMR chemical shifts and spin-spin coupling constants of di- and polysaccharides.
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Affiliation(s)
- Leonid B Krivdin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St. 1, 664033 Irkutsk, Russia
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35
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Heredia Díaz Y, Tuenter E, Garcia-Díaz J, Ochoa Pacheco A, Cos P, Pieters L, Escalona Arranz JC. Novel flavonol-3- O-methylethers from Zanthoxylum pistaciifolium Griseb. (Rutaceae). Nat Prod Res 2021; 36:4869-4878. [PMID: 33813981 DOI: 10.1080/14786419.2021.1906240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Zanthoxylum pistaciifolium Griseb. is a tree endemic to Cuba, occasionally used in herbal medicine. Previously, the antitrypanosomal activity of a n-hexane-2-butanone extract of Z. pistaciifolium leaves and of its constituent skimmianine were published. In the current study a more thorough examination of the respective extract is performed, which led to the isolation and identification of three flavonoids, more specifically, the flavonol-3-O-methylethers kaempferol-3-O-methylether (1) and novel compounds kaempferol-3-O-methylether-5-O-β-D-glucoside (2) and kaempferol-8-hydroxy-3,7-O-dimethylether-5-O-β-D-glucoside (3). All compounds were screened for their antimicrobial and antiprotozoal activity and cytotoxicity towards MRC-5 SV2 cells. Compound 1 showed a moderate to weak activity against Trypanosoma cruzi (IC50 30.8 μM), T. brucei (IC50 15.4 μM) and Plasmodium falciparum (IC50 53.8 μM), but also showed cytotoxicity (CC50 19.0 μM). Compounds 2 and 3 did not display activity in any of the assays (IC50 and CC50 > 64 μM).
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Affiliation(s)
- Yamilé Heredia Díaz
- Faculty of Natural and Exact Sciences, Pharmacy Department, University of Oriente, Santiago de Cuba, Cuba.,Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Emmy Tuenter
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Jesús Garcia-Díaz
- Faculty of Natural and Exact Sciences, Pharmacy Department, University of Oriente, Santiago de Cuba, Cuba
| | - Ania Ochoa Pacheco
- Faculty of Natural and Exact Sciences, Pharmacy Department, University of Oriente, Santiago de Cuba, Cuba
| | - Paul Cos
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Luc Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
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Dissolution and Interaction of Cellulose Carbamate in NaOH/ZnO Aqueous Solutions. Polymers (Basel) 2021; 13:polym13071092. [PMID: 33808408 PMCID: PMC8037852 DOI: 10.3390/polym13071092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 03/28/2021] [Accepted: 03/28/2021] [Indexed: 12/03/2022] Open
Abstract
The dissolution and molecular interactions of cellulose carbamate (CC) in NaOH/ZnO aqueous solutions were studied using optical microscopy, differential scanning calorimetry (DSC), 1H NMR, dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM), and molecular dynamic simulation. The dissolution of CC in NaOH/ZnO aqueous solutions using the freezing–thawing method was an exothermic process, and the lower temperature was favorable for the dissolution of CC. ZnO dissolved in NaOH aqueous solutions with the formation of Zn(OH)42−, and no free Zn2+ ions existed in the solvents. NaOH/Na2Zn(OH)4 system formed strong interactions with the hydroxyl groups of CC to improve its solubility and the stability of CC solution. The results indicate that 7 wt% NaOH/1.6 wt% ZnO aqueous solution was the most appropriate solvent for the dissolution of CC. This work revealed the dissolution interaction of CC-NaOH/ZnO solutions, which is beneficial for the industrialization of the CarbaCell process.
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Bhavaraju S, Taylor D, Niemitz M, Lankin DC, Bzhelyansky A, Giancaspro GI, Liu Y, Pauli GF. NMR-Based Quantum Mechanical Analysis Builds Trust and Orthogonality in Structural Analysis: The Case of a Bisdesmosidic Triglycoside as Withania somnifera Aerial Parts Marker. JOURNAL OF NATURAL PRODUCTS 2021; 84:836-845. [PMID: 33625215 PMCID: PMC8049857 DOI: 10.1021/acs.jnatprod.0c01131] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The present study demonstrates the relationship between conventional and quantum mechanical (QM) NMR spectroscopic analyses, shown here to assist in building a convincingly orthogonal platform for the solution and documentation of demanding structures. Kaempferol-3-O-robinoside-7-O-glucoside, a bisdesmosidic flavonol triglycoside and botanical marker for the aerial parts of Withania somnifera, served as an exemplary case. As demonstrated, QM-based 1H iterative full spin analysis (HiFSA) advances the understanding of both individual nuclear resonance spin patterns and the entire 1H NMR spectrum of a molecule and establishes structurally determinant, numerical HiFSA profiles. The combination of HiFSA with regular 1D 1H NMR spectra allows for simplified yet specific identification tests via comparison of high-quality experimental with QM-calculated spectra. HiFSA accounts for all features encountered in 1H NMR spectra: nonlinear high-order effects, complex multiplets, and their usually overlapped signals. As HiFSA replicates spectrum patterns from field-independent parameters with high accuracy, this methodology can be ported to low-field NMR instruments (40-100 MHz). With its reliance on experimental NMR evidence, the QM approach builds up confidence in structural characterization and potentially reduces identity analyses to simple 1D 1H NMR experiments. This approach may lead to efficient implementation of conclusive identification tests in pharmacopeial and regulatory analyses: from simple organics to complex natural products.
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Affiliation(s)
- Sitaram Bhavaraju
- United States Pharmacopeial Convention, Rockville, Maryland 20852, United States
| | - David Taylor
- United States Pharmacopeial Convention, Rockville, Maryland 20852, United States
| | | | - David C Lankin
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Anton Bzhelyansky
- United States Pharmacopeial Convention, Rockville, Maryland 20852, United States
| | - Gabriel I Giancaspro
- United States Pharmacopeial Convention, Rockville, Maryland 20852, United States
| | - Yang Liu
- United States Pharmacopeial Convention, Rockville, Maryland 20852, United States
| | - Guido F Pauli
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
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Khummanee N, Rudeekulthamrong P, Kaulpiboon J. Enzymatic Synthesis of Functional Xylose Glucoside and Its Application to Prebiotic. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821020058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Ishak KA, Fadzil MFA, Annuar MSM. Phase inversion emulsification of different vegetable oils using surfactant mixture of cremophor EL and lipase-synthesized glucose monooleate. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110568] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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40
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Kaunda JS, Qin XJ, Yang XZ, Mwitari PG, Zhu HT, Wang D, Zhang YJ. Ten new glycosides, carissaedulosides A-J from the root barks of Carissa edulis and their cytotoxicities. Bioorg Chem 2020; 102:104097. [PMID: 32717694 DOI: 10.1016/j.bioorg.2020.104097] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/09/2020] [Accepted: 07/10/2020] [Indexed: 11/26/2022]
Abstract
Ten previously undescribed glycosides, carissaedulosides A-J (1-10) referring to six apiosylated phenylpropanoids (1-6), one coumarin-secoiridoid hybrid (7), and three furofuran lignans (8-10) were isolated from the root barks of Carissa edulis, together with 13 known analogues (11-23). Their structures were elucidated by spectroscopic analysis, ECD computational methods, and chemical derivations for configurations of sugar moieties. The new lignan bisdesmoside, 10, exhibited significant cytotoxicity against A549 (IC50 = 3.87 ± 0.03 μM) and MCF-7 (IC50 = 9.231 ± 0.290 μM) cell lines, while the known lignan monodesmoside, 12, showed impressive cytotoxic efficacy (IC50 = 5.68 ± 0.180 μM) against only MCF-7 cell line. It is noted that a known cardenolide, 11, displayed strong cytotoxic potency against HL-60, A549, MCF-7 and SW480 cell lines with IC50 values ranging from 0.023 to 0.137 μM. Moreover, compound 11 induced dose-dependent apoptosis on SW480 cell, but not explicit dose-dependent apoptosis on HL-60 cells.
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Affiliation(s)
- Joseph Sakah Kaunda
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Xing-Zhi Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Peter Githaiga Mwitari
- Centre for Traditional Medicine and Drug Research, Kenya Medical Research Institute, Nairobi 54840-00200, Kenya
| | - Hong-Tao Zhu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Dong Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China
| | - Ying-Jun Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China.
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41
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Effect of echinalkamide identified from Echinacea purpurea (L.) Moench on the inhibition of osteoclastogenesis and bone resorption. Sci Rep 2020; 10:10914. [PMID: 32616823 PMCID: PMC7331694 DOI: 10.1038/s41598-020-67890-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 06/08/2020] [Indexed: 11/15/2022] Open
Abstract
Plant cell cultures have been exploited to provide stable production and new secondary metabolites for better pharmacological activity. Fractionation of adventitious root cultures of Echinacea purpurea resulted in the isolation of eleven constituents, including three new compounds. The structures of the three new compounds were determined to be an alkylamide (1), a polyacetylene (2) and a lignan (3) on the basis of combined spectroscopic analysis. To discover new types of antiresorptive agents, we screened for new compounds that regulate osteoclast differentiation, and survival. Among three new compounds, echinalkamide (compound 1) had considerably inhibitory effects on RANKL-induced osteoclast differentiation, and on proliferation of osteoclasts and efficiently attenuated osteoclastic bone resorption without toxicity. In addition, echinalamide treatment inhibited the osteoclast—specific gene expression level. Echinalkamide achieved this inhibitory effect by disturbing phosphorylation of MAPK and activation of osteoclast transcription factors c-Fos and NFATc1. Conclusionally, our study investigated that echinalkamide remarkably inhibited osteoclast differentiation and osteoclast specific gene expression through repression of the MAPK–c-Fos–NFATC1 cascade.
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42
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Lomas JS. Cooperativity in alkane-1,2- and 1,3-polyols: NMR, QTAIM, and IQA study of O─H … OH and C─H … OH bonding interactions. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:666-684. [PMID: 32201981 DOI: 10.1002/mrc.5014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/26/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
Proton nuclear magnetic resonance chemical shifts and atom-atom interaction energies for alkanepolyols with 1,2-diol and 1,3-diol repeat units, and for their 1:1 pyridine complexes, are computed by density functional theory calculations. In the 1,3-polyols, based on a tG'Gg' repeat unit, the only important intramolecular hydrogen bonding interactions are O─H… OH. By quantum theory of atoms in molecules analysis of the electron density, unstable bond and ring critical points are found for such interactions in 1,2-polyols with tG'g repeat units, from butane-1,2,3,4-tetrol onwards and in their pyridine complexes from propane-1,2,3-triol onwards. Several features (OH proton shifts and charges, and interaction energies computed by the interacting quantum atoms approach) are used to monitor the dependence of cooperativity on chain length: This is much less regular in 1,2-polyols than in 1,3-polyols and by most criteria has a higher damping factor. Well defined C─H… OH interactions are found in butane-1,2,3,4-tetrol and higher members of the 1,2-polyol series, as well as in their pyridine complexes: There is no evidence for cooperativity with O─H… OH bonding. For the 1,2-polyols, there is a tenuous empirical relationship between the existence of a bond critical point for O─H… OH hydrogen bonding and the interaction energies of competing exchange channels, but the primary/secondary ratio is always less than unity.
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Affiliation(s)
- John S Lomas
- ITODYS (CNRS UMR-7086), Université de Paris, Paris, France
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Kawano A, Fukui K, Matsumoto Y, Terada A, Tominaga A, Nikaido N, Tonozuka T, Totani K, Yasutake N. Analysis of Transglucosylation Products of Aspergillus niger α-Glucosidase that Catalyzes the Formation of α-1,2- and α-1,3-Linked Oligosaccharides. J Appl Glycosci (1999) 2020; 67:41-49. [PMID: 34354527 PMCID: PMC8311119 DOI: 10.5458/jag.jag.jag-2019_0015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 02/14/2020] [Indexed: 11/18/2022] Open
Abstract
According to whole-genome sequencing, Aspergillus niger produces multiple enzymes of glycoside hydrolases (GH) 31. Here we focus on a GH31 α-glucosidase, AgdB, from A. niger . AgdB has also previously been reported as being expressed in the yeast species, Pichia pastoris ; while the recombinant enzyme (rAgdB) has been shown to catalyze tranglycosylation via a complex mechanism. We constructed an expression system for A. niger AgdB using Aspergillus nidulans . To better elucidate the complicated mechanism employed by AgdB for transglucosylation, we also established a method to quantify glucosidic linkages in the transglucosylation products using 2D NMR spectroscopy. Results from the enzyme activity analysis indicated that the optimum temperature was 65 °C and optimum pH range was 6.0-7.0. Further, the NMR results showed that when maltose or maltopentaose served as the substrate, α-1,2-, α-1,3-, and small amount of α-1,1-β-linked oligosaccharides are present throughout the transglucosylation products of AgdB. These results suggest that AgdB is an α-glucosidase that serves as a transglucosylase capable of effectively producing oligosaccharides with α-1,2-, α-1,3-glucosidic linkages.
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Affiliation(s)
| | | | | | | | | | - Nozomi Nikaido
- Division of Chemical Engineering and Biotechnology, Department of Engineering for Future Innovation, National Institute of Technology, Ichinoseki College
| | - Takashi Tonozuka
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology
| | - Kazuhide Totani
- Division of Chemical Engineering and Biotechnology, Department of Engineering for Future Innovation, National Institute of Technology, Ichinoseki College
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Comprehensive structural analysis of a set of various branched glucans by standard methylation analysis, 1H NMR spectroscopy, ESI-mass spectrometry, and capillary electrophoresis. Carbohydr Res 2020; 489:107933. [DOI: 10.1016/j.carres.2020.107933] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 01/08/2020] [Accepted: 01/31/2020] [Indexed: 11/23/2022]
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45
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Fu X, Cebo M, Ikegami T, Lämmerhofer M. Separation of carbohydrate isomers and anomers on poly-N-(1H-tetrazole-5-yl)-methacrylamide-bonded stationary phase by hydrophilic interaction chromatography as well as determination of anomer interconversion energy barriers. J Chromatogr A 2020; 1620:460981. [PMID: 32115232 DOI: 10.1016/j.chroma.2020.460981] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/11/2020] [Accepted: 02/15/2020] [Indexed: 12/31/2022]
Abstract
A new commercially available HPLC column, poly-N-(1H-tetrazole-5-yl)-methacrylamide-bonded stationary phase (Daicel DCpak PTZ), was systematically evaluated for its carbohydrate isomer separation capability by hydrophilic interaction liquid chromatography (HILIC) with charged aerosol detection (CAD) or (tandem) mass spectrometry. Reducing sugars tend to split into two anomer peaks which makes carbohydrate isomer separations in non-derivatized form even more complicated. For practical purposes anomer separations are therefore ideally suppressed which can be accomplished by using high temperature or high pH that are both associated with fast interconversion kinetics leading to peak coalescence, or on the other hand by conditions with low chromatographic anomer selectivity. Four major hexoses (glucose, mannose, galactose, fructose), five main pentoses (ribose, ribulose, xylose, xylulose, arabinose) and five most important disaccharides (maltose, cellobiose, lactose, sucrose, trehalose) were analyzed as single carbohydrate standards by isocratic HILIC with 0.1% (v/v) formic acid and 2 mM ammonium acetate at various temperatures to study anomer interconversion equilibria in a pH-dependent manner. Rate constants of forward (α→β) and backward (β→α) anomerization and corresponding energy barriers were calculated. The energy barriers of anomerisation were in the range of around 83-91 kJ mol-1 at 298 K and the difference between forward (α→β) and backward reaction (β→α) was typically between 1-3 kJ mol-1. The systematic studies finally allowed to pick conditions for the simultaneous analysis of all 14 carbohydrates by HILIC-ESI-MS(/MS) with PTZ in gradient elution mode. A combination of carbohydrate isomer-selective LC (with PTZ), tandem MS (with carbohydrate group-selective MS1 and some species-specific SRM transitions) and a simple deconvolution strategy allowed the determination of all carbohydrates of the complex test mixture except for the disaccharide pair lactose and maltose (which can be determined as sum). Consequently, the proposed method represents a successful step towards a global glycometabolomics profiling method of mono- and disaccharides by HILIC-ESI-MS/MS.
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Affiliation(s)
- Xiaoqing Fu
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Malgorzata Cebo
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Tohru Ikegami
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany; Department of Materials Synthesis, Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Michael Lämmerhofer
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
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46
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Lee BZ, Kim CS, Jeong SK, Lee S, Lee IS, Hong K. Anti-inflammatory isocoumarins from the bark of Fraxinus chinensis subsp. rhynchophylla. Nat Prod Res 2020; 35:4380-4387. [PMID: 31960706 DOI: 10.1080/14786419.2020.1715401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A new isocoumarin (1) named fraxicoumarin was isolated from the bark of Fraxinus chinensis subsp. rhynchophylla along with three known compounds (2-4). The structure of the new compound was established by extensive spectroscopic studies and chemical evidence. The anti-inflammatory effects of the isolated compounds (1-4) on lipopolysaccharide (LPS)-induced RAW 264.7 macrophage cells were evaluated in vitro. Of the compounds tested, compounds 1 and 3 inhibited LPS-induced nitric oxide (NO) production in RAW 264.7 cells. Consistent with these findings, they also suppressed LPS-induced expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) at the protein level in RAW 264.7 cells.
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Affiliation(s)
- Beom Zoo Lee
- Department of Food Science and Biotechnology, College of Life Science and Biotechnology, Dongguk University, Goyang, Republic of Korea.,Chemland Co., Ltd., Gunpo, Republic of Korea
| | - Chan-Sik Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | | | - Sulhae Lee
- Chemland Co., Ltd., Gunpo, Republic of Korea
| | - Ik Soo Lee
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - KwangWon Hong
- Department of Food Science and Biotechnology, College of Life Science and Biotechnology, Dongguk University, Goyang, Republic of Korea
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Messinger H, Winkler A, Bär A. Genotoxic potential of cellobiose. Regul Toxicol Pharmacol 2019; 111:104554. [PMID: 31846711 DOI: 10.1016/j.yrtph.2019.104554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 11/29/2022]
Abstract
Cellobiose is a naturally occurring only slightly sweet disaccharide that may be used as a novel food ingredient. As part of the safety evaluation of cellobiose, produced from sucrose by an enzymatic process, an Ames test and an in-vitro micronucleus test with human peripheral lymphocytes were performed according to the respective OECD Guidelines. The results demonstrate that cellobiose lacks a genotoxic potential under the conditions of these standardized assays.
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Affiliation(s)
| | - Andreas Winkler
- LPT Laboratory of Pharmacology and Toxicology GmbH & Co. KG, 21147, Hamburg, Germany
| | - Albert Bär
- Bioresco Ltd., 4054, Basel, Switzerland.
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48
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Li Z, Li L, McKenna KR, Schmidt M, Pollet P, Gelbaum L, Fernández FM, Krishnamurthy R, Liotta CL. The Oligomerization of Glucose Under Plausible Prebiotic Conditions. ORIGINS LIFE EVOL B 2019; 49:225-240. [PMID: 31792744 DOI: 10.1007/s11084-019-09588-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/29/2019] [Indexed: 01/01/2023]
Abstract
The prebiotic origin of polysaccharides, the largest class of biopolymers by mass in extant biology, has seldom been investigated experimentally. Herein, we report on the acid-catalyzed condensation of aqueous solutions of glucose, a model monosaccharide, under plausible prebiotic conditions employing a wet-dry (night-day) protocol with 0.01 M HCl at 50 °C. This protocol leads to the formation of oligosaccharides containing up to eight monomeric units identified by high resolution mass spectrometry. The regio- and stereochemistry of the oligomeric acetal linkages, as well as the quantitative analysis of glucose conversion, are elucidated by combining 1H, 13C and 2D NMR spectroscopy. Ten out of eleven possible acetal linkages, including α- and β- anomers, have been identified with the α- and β- 1,6-acetals being the dominant linkages observed. In addition, the acid-catalyzed oligomerization of several glucose disaccharides such as cellobiose, maltose, and gentiobiose are presented along with an accompanying comparison with the corresponding oligomerization of glucose.
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Affiliation(s)
- Zhao Li
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA
| | - Li Li
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA
| | - Kristin R McKenna
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA
| | - Merranda Schmidt
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA
- Department of Chemistry, Ripon College, Ripon, WI, 54971, USA
| | - Pamela Pollet
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA
| | - Leslie Gelbaum
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Facundo M Fernández
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA.
| | - Ramanarayanan Krishnamurthy
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA, 92037, USA.
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA.
| | - Charles L Liotta
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- NSF/NASA Center for Chemical Evolution, Alexandria, GA, 30332, USA.
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İspirli H, Colquhoun IJ, Şahin E, Sagdic O, Dertli E. Preparation of gentiobiose-derived oligosaccharides by glucansucrase E81 and determination of prebiotic and immune-modulatory functions. Carbohydr Res 2019; 486:107837. [PMID: 31655418 DOI: 10.1016/j.carres.2019.107837] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 10/25/2022]
Abstract
Gentiobiose-derived oligosaccharides were synthesized by the acceptor reaction of glucansucrase E81 obtained from Lactobacillus reuteri E81 with sucrose and gentiobiose as donor-acceptor sugars, respectively. The reaction products were monitored by TLC analysis and gentiobiose-derived oligosaccharides up to DP 8 were formed during the acceptor reaction as determined by ESI-MS/MS analysis. The glycosylation of the gentiobiose with α-(1 → 6) linkages and α-(1 → 3) linkages was shown by 1H and 13C NMR analysis confirming the structure of these gentiobiose-derived oligosaccharides. The in vitro prebiotic function of the oligosaccharides was determined in which probiotic strains were stimulated whereas no growth was observed in pathogen strains. Gentiobiose-derived oligosaccharides showed immune-modulatory functions in vitro and triggered the production of IL-4, IL12 and TNF-α cytokines in HT29 cells in a dose dependent manner. This study showed the production and functional characterisation of gentiobiose-derived oligosaccharides establishing a promising avenue for future applications.
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Affiliation(s)
- Hümeyra İspirli
- Yıldız Technical University, Chemical and Metallurgical Engineering Faculty, Department of Food Engineering, Istanbul, 34000, Turkey
| | - Ian J Colquhoun
- Analytical Sciences Unit, Quadram Institute Bioscience, Norwich, UK
| | - Engin Şahin
- Department of Food Engineering, Faculty of Engineering, Bayburt University, Bayburt, 69000, Turkey
| | - Osman Sagdic
- Yıldız Technical University, Chemical and Metallurgical Engineering Faculty, Department of Food Engineering, Istanbul, 34000, Turkey
| | - Enes Dertli
- Department of Food Engineering, Faculty of Engineering, Bayburt University, Bayburt, 69000, Turkey.
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50
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Kaulpiboon J, Rudeekulthamrong P. Biosynthesis of methyl glucoside and its antibacterial activity against Staphylococcus aureus and Escherichia coli. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.bcdf.2019.100197] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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