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Semproli R, Robescu MS, Cambò M, Mema K, Bavaro T, Rabuffetti M, Ubiali D, Speranza G. Chemical and Enzymatic Approaches to Esters of
sn
‐Glycero‐3‐Phosphoric Acid. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Riccardo Semproli
- Department of Drug Sciences University of Pavia Viale Taramelli, 12 I-27100 Pavia Italy
| | - Marina S. Robescu
- Department of Drug Sciences University of Pavia Viale Taramelli, 12 I-27100 Pavia Italy
| | - Mattia Cambò
- Department of Chemistry University of Milano Via Golgi, 19 I-20133 Milano Italy
| | - Klodiana Mema
- Department of Drug Sciences University of Pavia Viale Taramelli, 12 I-27100 Pavia Italy
- Consorzio Italbiotec Piazza della Trivulziana 4/A 20126 Milano Italy
| | - Teodora Bavaro
- Department of Drug Sciences University of Pavia Viale Taramelli, 12 I-27100 Pavia Italy
| | - Marco Rabuffetti
- Department of Chemistry University of Milano Via Golgi, 19 I-20133 Milano Italy
| | - Daniela Ubiali
- Department of Drug Sciences University of Pavia Viale Taramelli, 12 I-27100 Pavia Italy
| | - Giovanna Speranza
- Department of Chemistry University of Milano Via Golgi, 19 I-20133 Milano Italy
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Zhao SY, Li N, Luo WY, Zhang NN, Zhou RY, Li CY, Wang J. Chemical synthesis and antigenic activity of a phosphatidylinositol mannoside epitope from Mycobacterium tuberculosis. Chem Commun (Camb) 2020; 56:14067-14070. [PMID: 33104149 DOI: 10.1039/d0cc05573e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phosphatidylinositol mannosides (PIMs) have been investigated as lipidic antigens for a new subunit tuberculosis vaccine. A non-natural diacylated phosphatidylinositol mannoside (Ac2PIM2) was designed and synthesized by mimicking the natural PIM6 processing procedure in dentritic cells. This synthetic Ac2PIM2 was achieved from α-methyl d-glucopyranoside 1 in 17 steps in 2.5% overall yield. A key feature of the strategy was extending the use of the chiral myo-inositol building block A to the O-2 and O-6 positions of the inositol unit to allow for introducing the mannose building blocks B1 and B2, and to the O-1 position for the phosphoglycerol building block C. Building block A, being a flexible core unit, may facilitate future access to other higher-order PIM analogues. A preliminary antigenic study showed that the synthetic PIM epitope (Ac2PIM2) was significantly more active than natural Ac2PIM2, which indicated that the synthetic Ac2PIM2 can be strongly immunoactive and may be developed as a potential vaccine.
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Affiliation(s)
- Shi-Yuan Zhao
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Na Li
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Wan-Yue Luo
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Nan-Nan Zhang
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Rong-Ye Zhou
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Chen-Yu Li
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China.
| | - Jin Wang
- School of Pharmacy, Yancheng Teachers University, Hope Avenue South Road No. 2, Yancheng, 224007, Jiangsu Province, P. R. China. and Université de Toulouse, Université Toulouse III - Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 9, France and CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), 205 route de Narbonne, 31077 Toulouse, France
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3
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Diastereoselective desymmetric 1,2-cis-glycosylation of meso-diols via chirality transfer from a glycosyl donor. Nat Commun 2020; 11:2431. [PMID: 32415161 PMCID: PMC7229163 DOI: 10.1038/s41467-020-16365-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 04/28/2020] [Indexed: 12/02/2022] Open
Abstract
Chemical desymmetrization reactions of meso-diols are highly effective for the precise and efficient synthesis of chiral molecules. However, even though enzyme-catalyzed desymmetric glycosylations are frequently found in nature, there is no method for highly diastereoselective desymmetric chemical glycosylation of meso-diols. Herein, we report a highly diastereoselective desymmetric 1,2-cis-glycosylation of meso-diols found in myo-inositol 1,3,5-orthoesters using a boronic acid catalyst based on predictions of regioselectivity by density functional theory (DFT) calculations. The enantiotopic hydroxyl groups of the meso-diols are clearly differentiated by the stereochemistry at the C2 position of the glycosyl donor with excellent regioselectivities. In addition, the present method is successfully applied to the synthesis of core structures of phosphatidylinositolmannosides (PIMs) and glycosylphosphatidylinositol (GPI) anchors, and common β-mannoside structures of the LLBM-782 series of antibiotics. Enzyme-catalyzed desymmetric glycosylations are often found in nature, however the corresponding chemical methods are lacking. Here, the authors report a highly diastereoselective desymmetric 1,2-cis-glycosylation of meso-diols found in myo-inositol 1,3,5-orthoesters using a boronic acid catalyst.
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Gan CH, Wijaya H, Li LH, Wei CF, Peng YJ, Wu SH, Hua KF, Lam Y. H-Phosphonate Synthesis and Biological Evaluation of an Immunomodulatory Phosphoglycolipid from Thermophilic Bacteria. Org Lett 2020; 22:2569-2573. [PMID: 32202806 DOI: 10.1021/acs.orglett.0c00487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of a library of bacterial phosphoglycolipid, PGL-1, is described. Key features of the synthesis include regioselective esterification of the primary alcohol of the diacylglycerol moiety and an H-phosphonate method to install the phosphate in PGL-1 in comparison with earlier reported procedures. A representative set of PGL-1 analogues was prepared and evaluated for their biological activities. Results showed that the immunological activity of PGL-1 is dependent on the chain lengths of the fatty acids.
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Affiliation(s)
- Chin Heng Gan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Hadhi Wijaya
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Lan-Hui Li
- Department of Laboratory Medicine, Linsen, Chinese Medicine and Kunming Branch, Taipei City Hospital, No 100, Kunming Street, Taipei 10844, Taiwan.,Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, No 161, Sec 6, Minquan E. Road, Taipei 11490, Taiwan
| | - Chih-Feng Wei
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, No 161, Sec 6, Minquan E. Road, Taipei 11490, Taiwan
| | - Yi-Jen Peng
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, No 161, Sec 6, Minquan E. Road, Taipei 11490, Taiwan
| | - Shih-Hsiung Wu
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road Sec 2, Nankang, Taipei 115, Taiwan
| | - Kuo-Feng Hua
- Department of Biotechnology and Animal Science, National Ilan University, No 1 Sec 1 Shennong Road, Yilan County 260, Taiwan.,Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, No 161, Sec 6, Minquan E. Road, Taipei 11490, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, No 91, Hsueh-Shih Road, Taichung 40402, Taiwan
| | - Yulin Lam
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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Mosaiab T, Boiteux S, Zulfiker AHM, Wei MQ, Kiefel MJ, Houston TA. A Simple Glycolipid Mimic of the Phosphatidylinositol Mannoside Core from Mycobacterium tuberculosis Inhibits Macrophage Cytokine Production. Chembiochem 2018; 19:1476-1481. [PMID: 29693771 DOI: 10.1002/cbic.201800150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Indexed: 11/10/2022]
Abstract
Glycolipids from Mycobacterium tuberculosis have a profound impact on the innate immune response of the host. Macrophage-inducible C-type lectin (Mincle) is a pattern-recognition receptor that has been shown to bind trehalose dimycolate (TDM) from the mycobacterium and instigate intracellular signalling in the immune cell. There are structural similarities between the structures of TDM and phosphatidyl inositol mannoside (PIM). We thus hypothesized that these latter structures might also modulate an immune response in a similar manner. To test this, we synthesized a series of new mannose derivatives modified with fatty esters at the 6-position and assessed the release of inflammatory cytokines in human U937 macrophages under the induction of lipopolysaccharides (LPS) after glycolipid treatment. The results showed that the amount of two major cytokines-tumour necrosis factor (TNF)-α and interleukin (IL)-6-released from LPS-stimulated U937 cells decreased significantly when compared to a control upon treatment with the prepared glycolipids, thus indicating a reduction in cytokine production by the macrophages.
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Affiliation(s)
- Tamim Mosaiab
- Institute for Glycomics, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia
| | - Sandra Boiteux
- Institute for Glycomics, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia
| | - Abu Hasanat Md Zulfiker
- Menzies Health Institute Queensland and School of Medical Science, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia.,Department of Biomedical Sciences, John C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV, 25701, USA
| | - Ming Q Wei
- Menzies Health Institute Queensland and School of Medical Science, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia
| | - Milton J Kiefel
- Institute for Glycomics, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia
| | - Todd A Houston
- Institute for Glycomics, Griffith University, Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia
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Burugupalli S, Richardson MB, Williams SJ. Total synthesis and mass spectrometric analysis of a Mycobacterium tuberculosis phosphatidylglycerol featuring a two-step synthesis of (R)-tuberculostearic acid. Org Biomol Chem 2018; 15:7422-7429. [PMID: 28831486 DOI: 10.1039/c7ob01786c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report the total synthesis of (R)-tuberculostearic acid-containing Mycobacterium tuberculosis phosphatidylglycerol (PG). The approach features a two-step synthesis of (R)-tuberculostearic acid, involving an (S)-citronellyl bromide linchpin, and the phosphoramidite-assisted assembly of the full PG structure. Collision-induced dissociation mass spectrometry of two chemically-synthesized PG acyl regioisomers revealed diagnostic product ions formed by preferential loss of carboxylate at the secondary (sn-2) position.
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Affiliation(s)
- Satvika Burugupalli
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia 3010.
| | - Mark B Richardson
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia 3010.
| | - Spencer J Williams
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia 3010.
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The chemoselective O-glycosylation of alcohols in the presence of a phosphate diester and its application to the synthesis of oligomannosylated phosphatidyl inositols. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Patil PS, Cheng TJR, Zulueta MML, Yang ST, Lico LS, Hung SC. Total synthesis of tetraacylated phosphatidylinositol hexamannoside and evaluation of its immunomodulatory activity. Nat Commun 2015; 6:7239. [PMID: 26037164 PMCID: PMC4468851 DOI: 10.1038/ncomms8239] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 04/20/2015] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis, aggravated by drug-resistant strains and HIV co-infection of the causative agent Mycobacterium tuberculosis, is a global problem that affects millions of people. With essential immunoregulatory roles, phosphatidylinositol mannosides are among the cell-envelope components critical to the pathogenesis and survival of M. tuberculosis inside its host. Here we report the first synthesis of the highly complex tetraacylated phosphatidylinositol hexamannoside (Ac2PIM6), having stearic and tuberculostearic acids as lipid components. Our effort makes use of stereoelectronic and steric effects to control the regioselective and stereoselective outcomes and minimize the synthetic steps, particularly in the key desymmetrization and functionalization of myo-inositol. A short synthesis of tuberculostearic acid in six steps from the Roche ester is also described. Mice exposed to the synthesized Ac2PIM6 exhibit increased production of interleukin-4 and interferon-γ, and the corresponding adjuvant effect is shown by the induction of ovalbumin- and tetanus toxoid-specific antibodies. Phosphatidylinositol mannosides are cell envelope components vital for the survival of M. tuberculosis. Here, the authors report an elegant and convergent total synthesis of the complex glycolipid tetraacylated phosphatidylinositol hexamannoside (Ac2PIM6) and study the immunological effects in mice.
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Affiliation(s)
- Pratap S Patil
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
| | - Ting-Jen Rachel Cheng
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
| | - Medel Manuel L Zulueta
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
| | - Shih-Ting Yang
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
| | - Larry S Lico
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
| | - Shang-Cheng Hung
- Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei 115, Taiwan
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Lee AMM, Painter GF, Compton BJ, Larsen DS. Resolution of orthogonally protected myo-inositols with novozym 435 providing an enantioconvergent pathway to Ac2PIM1. J Org Chem 2014; 79:10916-31. [PMID: 25338261 DOI: 10.1021/jo5019188] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Orthogonally protected chiral myo-inositol derivatives are important intermediates for higher order myo-inositol-containing compounds. Here, the use of the immobilized enzyme Novozym 435 to efficiently catalyze the acetylation of the 5R configured enantiomer of racemic 1,2-O-isopropylidene-myo-inositols possessing chemically and sterically diverse protecting groups at O-3 and O-6 is described. The resolutions were successful with allyl, benzyl, 4-bromo-, 4-methoxy-, 4-nitro-, and 4-(3,4-dimethoxyphenyl)benzyl, propyl, and propargyl protection at O-6 in combination with either allyl or benzyl groups at O-3. Bulky protecting groups slow the rate of acetylation. No reaction was observed for 3,6-di-O-triisopropylsilyl-1,2-O-isopropylidene-myo-inositol. The utility of this methodology was demonstrated by the first reported synthesis of an Ac2PIM1 (9), which used both enantiomers of the resolved 3-O-allyl-6-O-benzyl-1,2-O-isopropylidene-myo-inositol in a convergent synthesis.
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Affiliation(s)
- Alastair M M Lee
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin, New Zealand
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Rankin GM, Maxwell-Cameron I, Painter GF, Larsen DS. The Dimethoxyphenylbenzyl Protecting Group: An Alternative to the p-Methoxybenzyl Group for Protection of Carbohydrates. J Org Chem 2013; 78:5264-72. [DOI: 10.1021/jo4004184] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | - Gavin F. Painter
- Carbohydrate
Chemistry Team, Callaghan Innovation, PO
Box 31-310, Lower Hutt, New
Zealand
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Cao B, Chen X, Yamaryo-Botte Y, Richardson MB, Martin KL, Khairallah GN, Rupasinghe TW, O’Flaherty RM, O’Hair RA, Ralton JE, Crellin PK, Coppel RL, McConville MJ, Williams SJ. Synthesis, Structural Elucidation, And Biochemical Analysis of Immunoactive Glucuronosyl Diacylglycerides of Mycobacteria and Corynebacteria. J Org Chem 2013; 78:2175-90. [DOI: 10.1021/jo302508e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Paul K. Crellin
- Department of Microbiology, Monash University, Victoria 3800, Australia
| | - Ross L. Coppel
- Department of Microbiology, Monash University, Victoria 3800, Australia
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Front S, Bourigault ML, Rose S, Noria S, Quesniaux VFJ, Martin OR. Synthesis and biological investigation of PIM mimics carrying biotin or a fluorescent label for cellular imaging. Bioconjug Chem 2012. [PMID: 23190446 DOI: 10.1021/bc3004974] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Phosphatidyl inositol mannosides (PIMs) are constituents of the mycobacterial cell wall; these glycolipids are known to exhibit potent inhibitory activity toward the LPS-induced production of cytokines by macrophages, and therefore have potential as anti-inflammatory agents. Recently, heterocyclic analogues of PIMs in which the inositol is replaced by a piperidine (aza-PIM mimics) or a tetrahydropyran moiety (oxa-PIM mimics) have been prepared by short synthetic sequences and shown to retain the biological activity of the parent PIM structures. In this investigation, the aza-PIM analogue was used as a convenient scaffold to link biotin or a fluorescent label (tetramethyl-rhodamine) by way of an aminocaproyl spacer, with the goal of using these conjugates for intracellular localization and for the study of the mechanism of their antiinflammatory action. The synthesis of these compounds is reported, as well as the evaluation of their activities as inhibitors of LPS-induced cytokine production by macrophages (TNFα, IL12p40); preliminary investigations by FACS and confocal microscopy indicated that PIM-biotin conjugate binds to macrophage membranes with rapid kinetics.
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Affiliation(s)
- Sophie Front
- Institut de Chimie Organique et Analytique, Université d'Orléans, CNRS UMR 7311, Rue de Chartres, 45067 Orléans, France
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