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Reihill M, Fournière V, Cheallaigh AN, Edlund JO, Miller GJ, Borén T, Lahmann M, Oscarson S. Synthesis of a B-Antigen Hexasaccharide, a B-Lewis b Heptasaccharide and Glycoconjugates Thereof to Investigate Binding Properties of Helicobacter pylori. Chemistry 2023; 29:e202203672. [PMID: 36562295 DOI: 10.1002/chem.202203672] [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: 11/24/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 12/24/2022]
Abstract
Infecting the stomach of almost 50 % of people, Helicobacter pylori is a causative agent of gastritis, peptic ulcers and stomach cancers. Interactions between bacterial membrane-bound lectin, Blood group Antigen Binding Adhesin (BabA), and human blood group antigens are key in the initiation of infection. Herein, the synthesis of a B-antigen hexasaccharide (B6) and a B-Lewis b heptasaccharide (BLeb7) and Bovine Serum Albumin glycoconjugates thereof is reported to assess the binding properties and preferences of BabA from different strains. From a previously reported trisaccharide acceptor a versatile key Lacto-N-tetraose tetrasaccharide intermediate was synthesized, which allowed us to explore various routes to the final targets, either via initial introduction of fucosyl residues followed by introduction of the B-determinant or vice versa. The first approach proved unsuccessful, whereas the second afforded the target structures in good yields. Protein conjugation using isothiocyanate methodology allowed us to reach high glycan loadings (up to 23 per protein) to mimic multivalent displays encountered in Nature. Protein glycoconjugate inhibition binding studies were performed with H. pylori strains displaying high or low affinity for Lewis b hexasaccharide structures showing that the binding to the high affinity strain was reduced due to the presence of the B-determinant in the Bleb7-conjugates and further reduced by the absence of the Lewis fucose residue in the B6-conjugate.
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Affiliation(s)
- Mark Reihill
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Viviane Fournière
- School of Natural Sciences, Bangor University, Bangor, Gwynedd, LL57 2UW, UK
| | - Aisling Ní Cheallaigh
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
- Lennard-Jones Laboratories, Centre for Glycoscience Research, Keele University, Staffordshire, ST5 5BG, UK
| | - Johan Olofsson Edlund
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Gavin John Miller
- Lennard-Jones Laboratories, Centre for Glycoscience Research, Keele University, Staffordshire, ST5 5BG, UK
| | - Thomas Borén
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Martina Lahmann
- School of Natural Sciences, Bangor University, Bangor, Gwynedd, LL57 2UW, UK
| | - Stefan Oscarson
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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Li Y, Wang M, Hong S. Live-Cell Glycocalyx Engineering. Chembiochem 2023; 24:e202200707. [PMID: 36642971 DOI: 10.1002/cbic.202200707] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/14/2023] [Accepted: 01/14/2023] [Indexed: 01/17/2023]
Abstract
A heavy layer of glycans forms a brush matrix bound to the outside of all the cells in our bodies; it is referred to as the "sugar forest" or glycocalyx. Beyond the increased appreciation of the glycocalyx over the past two decades, recent advances in engineering the glycocalyx on live cells have spurred the creation of cellular drugs and novel medical treatments. The development of new tools and techniques has empowered scientists to manipulate the structures and functions of cell-surface glycans on target cells and endow target cells with desired properties. Herein, we provide an overview of live-cell glycocalyx engineering strategies for controlling the cell-surface molecular repertory to suit therapeutic applications, even though the realm of this field remains young and largely unexplored.
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Affiliation(s)
- Yuxin Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, and School of Pharmaceutical Sciences, Peking University, Health Science Center, Beijing, 100191, China
| | - Mingzhen Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, and School of Pharmaceutical Sciences, Peking University, Health Science Center, Beijing, 100191, China
| | - Senlian Hong
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, and School of Pharmaceutical Sciences, Peking University, Health Science Center, Beijing, 100191, China
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Lv J, Liu CY, Guo YF, Feng GJ, Dong H. SnCl2‐catalyzed acetalation/selective‐benzoylation sequence for the synthesis of orthogonally protected glycosyl acceptors. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jian Lv
- Huazhong University of Science and Technology - Main Campus: Huazhong University of Science and Technology School of Chemistry and Chemical Engineering CHINA
| | - Chun-Yang Liu
- Huazhong University of Science and Technology - Main Campus: Huazhong University of Science and Technology School of Chemistry and Chemical Engineering CHINA
| | - Yang-Fan Guo
- Huazhong University of Science and Technology - Main Campus: Huazhong University of Science and Technology School of Chemistry and Chemical Engineering CHINA
| | - Guang-Jing Feng
- Huazhong University of Science and Technology - Main Campus: Huazhong University of Science and Technology School of Chemistry and Chemical Engineering CHINA
| | - Hai Dong
- Huazhong University of Science and Technology - Main Campus: Huazhong University of Science and Technology School of Chemistry & Chemical Engineering Luoyu Road 1037 430074 Wuhan CHINA
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Kunetskiy RA, Pazynina GV, Ivanov IA, Bovin NV. Synthesis of blood group A and B (type 2) tetrasaccharides. A strategy with fucosylation at the last stage. Carbohydr Res 2020; 498:108192. [DOI: 10.1016/j.carres.2020.108192] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/31/2020] [Accepted: 11/02/2020] [Indexed: 12/28/2022]
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