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Ji H, Yang X, Zhou H, Cui F, Zhou Q. Rapid Evaluation of Antibacterial Carbohydrates on a Microfluidic Chip Integrated with the Impedimetric Neoglycoprotein Biosensor. BIOSENSORS 2023; 13:887. [PMID: 37754121 PMCID: PMC10526297 DOI: 10.3390/bios13090887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/07/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023]
Abstract
The colonization of some bacteria to their host cell is mediated by selective adhesion between adhesin and glycan. The evaluation of antiadhesive carbohydrates in vitro has great significance in discovering new antibacterial drugs. In this paper, a microfluidic chip integrated with impedimetric neoglycoprotein biosensors was developed to evaluate the antibacterial effect of carbohydrates. Mannosylated bovine serum albumin (Man-BSA) was taken as the neoglycoprotein and immobilized on the microelectrode-modified gold nanoparticles (Au NPs) to form a bionic glycoprotein nanosensing surface (Man-BSA/Au NPs). Salmonella typhimurium (S. typhimurium) was selected as a bacteria model owing to its selective adhesion to the mannose. Electrochemical impedance spectroscopy (EIS) was used to characterize the adhesion capacity of S. typhimurium to the Man-BSA/Au NPs and evaluate the antiadhesive efficacy of nine different carbohydrates. It was illustrated that the 4-methoxyphenyl-α-D-pyran mannoside (Phenyl-Man) and mannan peptide (Mannatide) showed excellent antiadhesive efficacy, with IC50 values of 0.086 mM and 0.094 mM, respectively. The microfluidic device developed in this study can be tested in multiple channels. Compared with traditional methods for evaluating the antibacterial drug in vitro, it has the advantages of being fast, convenient, and cost-effective.
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Affiliation(s)
| | | | | | - Feiyun Cui
- The Ministry of Education Key Laboratory of Clinical Diagnostics, School of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China; (H.J.); (X.Y.); (H.Z.)
| | - Qin Zhou
- The Ministry of Education Key Laboratory of Clinical Diagnostics, School of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China; (H.J.); (X.Y.); (H.Z.)
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Structural characterization and in vitro analysis of the prebiotic activity of oligosaccharides from lotus (Nelumbo nucifera Gaertn.) seeds. Food Chem 2022; 388:133045. [PMID: 35486989 DOI: 10.1016/j.foodchem.2022.133045] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 04/08/2022] [Accepted: 04/20/2022] [Indexed: 11/21/2022]
Abstract
In the present study, lotus seed oligosaccharides (LOSs) were isolated from lotus (Nelumbo nucifera Gaertn.) seeds using preparative liquid chromatography. LOS structures were characterized using fourier transform infrared spectroscopy (FT-IR), acid hydrolysis, tandemmass spectrometry (MS/MS) and 1D/2D nuclear magnetic resonance (NMR) spectroscopy. Then, Lactobacillus acidophilus was used to evaluate the prebiotic activity of LOSs in vitro. The structural analysis revealed that the monosaccharide components of LOSs included glucose, mannose, fructose and galactose. The MS/MS results indicated that disaccharides, trisaccharides, trisaccharides and tetrasaccharides were the constituents of isolated oligosaccharide polymers LOS2, LOS3-1, LOS3-2, and LOS4, respectively. The FT-IR and 1D/2D NMR data confirmed that LOS3 and LOS4 had a linear structure consisting of (1 → 6)-α-d-mannopyranosyl and glucopyranosyl residues. LOS3-1 and LOS4 effectively and selectively promoted the growth of an L. acidophilus strain, according to the results of the assays of optical density and the short-chain fatty acid (SCFA) content in the culture broth.
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Yu Q, Chen W, Zhong J, Huang D, Shi W, Chen H, Yan C. Purification, structural characterization, and bioactivities of a polysaccharide from
Coreopsis tinctoria. FOOD FRONTIERS 2022. [DOI: 10.1002/fft2.145] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Qian Yu
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Wei Chen
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Jing Zhong
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Dong Huang
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Wenting Shi
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Haiyun Chen
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou China
| | - Chunyan Yan
- School of Clinical Pharmacy Guangdong Pharmaceutical University Guangzhou China
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Properties of hydrolyzed guar gum fermented in vitro with pig fecal inocula and its favorable impacts on microbiota. Carbohydr Polym 2020; 237:116116. [PMID: 32241396 DOI: 10.1016/j.carbpol.2020.116116] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 02/12/2020] [Accepted: 03/02/2020] [Indexed: 01/02/2023]
Abstract
In order to identify an appropriate substitute for antibiotic use in livestock production, this study investigates the fermentation of guar gum and its low molecular weight hydrolyzed derivatives (GMLP-1, 1-10 kDa; GMLP-2, < 1 kDa) in pig fecal cultures and the associated effects on the intestinal microbiota. Both the non-hydrolyzed guar gum and GMLP were quickly utilized by fecal microbiota. GMLP-2 showed the most rapid SCFA-producing activity and produced higher concentrations of lactate, acetate, and propionate. However, GMLP-1 showed the highest yield of total SCFAs and butyrate. Both the guar gum and GMLP groups improved the abundance of Clostridium sensu stricto 1 and Bifidobacterium, but the most significant enhancement was observed with GMLP-1. This study showed that by associating with its chemical structure, GMLP-1 can be utilized to direct a targeted promotion of the intestinal microbiota and may offer the most favorable effects in livestock production.
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Shi XD, Yin JY, Zhang LJ, Li OY, Huang XJ, Nie SP. Studies on polysaccharides from leaf skin of Aloe barbadensis Miller: Part II. Structural characteristics and molecular properties of two lower molecular weight fractions. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.01.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Shi XD, Yin JY, Huang XJ, Que ZQ, Nie SP. Structural and conformational characterization of linear O-acetyl-glucomannan purified from gel of Aloe barbadensis Miller. Int J Biol Macromol 2018; 120:2373-2380. [DOI: 10.1016/j.ijbiomac.2018.09.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/14/2018] [Accepted: 09/02/2018] [Indexed: 11/29/2022]
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7
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Francis AP, Gurudevan S, Jayakrishnan A. Synthetic polymannose as a drug carrier: synthesis, toxicity and anti-fungal activity of polymannose-amphotericin B conjugates. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1529-1548. [DOI: 10.1080/09205063.2018.1469186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Arul Prakash Francis
- Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, India
| | - Sneha Gurudevan
- Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, India
| | - A. Jayakrishnan
- Biomaterials Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, India
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Shi XD, Nie SP, Yin JY, Que ZQ, Zhang LJ, Huang XJ. Polysaccharide from leaf skin of Aloe barbadensis Miller: Part I. Extraction, fractionation, physicochemical properties and structural characterization. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2017.06.039] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Wang J, Gao Z, Qi W, Zhao Y, Zhang P, Lin M, Li Z, Chen G, Jiang M. Interactions of Glycopolymers with Assemblies of Peptide Amphiphiles via Dynamic Covalent Bonding. ACS Biomater Sci Eng 2017; 4:2061-2066. [PMID: 33445277 DOI: 10.1021/acsbiomaterials.7b00642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this work, peptide amphiphile (PA) with benzoboroxole (BOB) group at the hydrophilic end was prepared and assembled into fibers (PAA) with BOB group on the fiber surface. Then glycopolymer with mannopyranoside as pendent group interacted with the PAA via dynamic covalent bond between sugar and BOB. By combining the results from 2D 1H NMR spectroscopy, the exact binding mode of mannopyranoside pendent group and BOB, i.e., mannopyranoside participated by its diol on 2,3-position instead of that on 4,6-position, which was clearly observed on the fiber surface. The success in determining this binding mode in macroscopic material was due to the high density of BOB on PAA and the multivalent effect between the multiple BOB moieties on fiber surface and repeating mannopyranoside groups of the glycopolymer.
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Moreira ASP, Nunes FM, Simões C, Maciel E, Domingues P, Domingues MRM, Coimbra MA. Transglycosylation reactions, a main mechanism of phenolics incorporation in coffee melanoidins: Inhibition by Maillard reaction. Food Chem 2017; 227:422-431. [PMID: 28274453 DOI: 10.1016/j.foodchem.2017.01.107] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/11/2017] [Accepted: 01/19/2017] [Indexed: 01/30/2023]
Abstract
Under roasting conditions, polysaccharides depolymerize and also are able to polymerize, forming new polymers through non-enzymatic transglycosylation reactions (TGRs). TGRs can also occur between carbohydrates and aglycones, such as the phenolic compounds present in daily consumed foods like coffee. In this study, glycosidically-linked phenolic compounds were quantified in coffee melanoidins, the polymeric nitrogenous brown-colored compounds formed during roasting, defined as end-products of Maillard reaction. One third of the phenolics present were in glycosidically-linked form. In addition, the roasting of solid-state mixtures mimicking coffee beans composition allowed the conclusion that proteins play a regulatory role in TGRs extension and, consequently, modulate melanoidins composition. Overall, the results obtained showed that TGRs are a main mechanism of phenolics incorporation in melanoidins and are inhibited by amino groups through Maillard reaction.
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Affiliation(s)
- Ana S P Moreira
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Fernando M Nunes
- CQ-VR, Chemistry Research Centre, Department of Chemistry, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
| | - Cristiana Simões
- CQ-VR, Chemistry Research Centre, Department of Chemistry, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
| | - Elisabete Maciel
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; CESAM, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Pedro Domingues
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | | | - Manuel A Coimbra
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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