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Chen D, Lin Y, Fan Y, Li L, Tan C, Wang J, Lin H, Gao J. Glycan Metabolic Fluorine Labeling for In Vivo Visualization of Tumor Cells and In Situ Assessment of Glycosylation Variations. Angew Chem Int Ed Engl 2023; 62:e202313753. [PMID: 37899303 DOI: 10.1002/anie.202313753] [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: 09/14/2023] [Revised: 10/24/2023] [Accepted: 10/29/2023] [Indexed: 10/31/2023]
Abstract
The abnormality in the glycosylation of surface proteins is critical for the growth and metastasis of tumors and their capacity for immunosuppression and drug resistance. This anomaly offers an entry point for real-time analysis on glycosylation fluctuations. In this study, we report a strategy, glycan metabolic fluorine labeling (MEFLA), for selectively tagging glycans of tumor cells. As a proof of concept, we synthesized two fluorinated unnatural monosaccharides with distinctive 19 F chemical shifts (Ac4 ManNTfe and Ac4 GalNTfa). These two probes could undergo selective uptake by tumor cells and subsequent incorporation into surface glycans. This approach enables efficient and specific 19 F labeling of tumor cells, which permits in vivo tracking of tumor cells and in situ assessment of glycosylation changes by 19 F MRI. The efficiency and specificity of our probes for labeling tumor cells were verified in vitro with A549 cells. The feasibility of our method was further validated with in vivo experiments on A549 tumor-bearing mice. Moreover, the capacity of our approach for assessing glycosylation changes of tumor cells was illustrated both in vitro and in vivo. Our studies provide a promising means for visualizing tumor cells in vivo and assessing their glycosylation variations in situ through targeted multiplexed 19 F MRI.
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Affiliation(s)
- Dongxia Chen
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yaying Lin
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yifan Fan
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Lingxuan Li
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chenlei Tan
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Junjie Wang
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hongyu Lin
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518000, China
| | - Jinhao Gao
- Fujian Provincial Key Laboratory of Chemical Biology, The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518000, China
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2
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Gao Z, Chen S, Du J, Wu Z, Ge W, Gao S, Zhou Z, Yang X, Xing Y, Shi M, Hu Y, Tang W, Xia J, Zhang X, Jiang J, Yang S. Quantitative analysis of fucosylated glycoproteins by immobilized lectin-affinity fluorescent labeling. RSC Adv 2023; 13:6676-6687. [PMID: 36860533 PMCID: PMC9969232 DOI: 10.1039/d3ra00072a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/14/2023] [Indexed: 03/02/2023] Open
Abstract
Human biofluids are often used to discover disease-specific glycosylation, since abnormal changes in protein glycosylation can discern physiopathological states. Highly glycosylated proteins in biofluids make it possible to identify disease signatures. Glycoproteomic studies on saliva glycoproteins showed that fucosylation was significantly increased during tumorigenesis and that glycoproteins became hyperfucosylated in lung metastases, and tumor stage is associated with fucosylation. Quantification of salivary fucosylation can be achieved by mass spectrometric analysis of fucosylated glycoproteins or fucosylated glycans; however, the use of mass spectrometry is non-trivial for clinical practice. Here, we developed a high-throughput quantitative method, lectin-affinity fluorescent labeling quantification (LAFLQ), to quantify fucosylated glycoproteins without relying on mass spectrometry. Lectins with a specific affinity for fucoses are immobilized on the resin and effectively capture fluorescently labeled fucosylated glycoproteins, which are further quantitatively characterized by fluorescence detection in a 96-well plate. Our results demonstrated that serum IgG can be accurately quantified by lectin and fluorescence detection. Quantification in saliva showed significantly higher fucosylation in lung cancer patients compared to healthy controls or other non-cancer diseases, suggesting that this method has the potential to quantify stage-related fucosylation in lung cancer saliva.
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Affiliation(s)
- Ziyuan Gao
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University Suzhou 215006 China
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University Suzhou 215123 China
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Soochow University Suzhou 215006 China
| | - Sufeng Chen
- Clinical Laboratory Center, Zhejiang Provincial People's Hospital Hangzhou Zhejiang 310014 China
| | - Jing Du
- Clinical Laboratory Center, Zhejiang Provincial People's Hospital Hangzhou Zhejiang 310014 China
| | - Zhen Wu
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University Shanghai 200438 China
| | - Wei Ge
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University Suzhou 215123 China
- Department of Gastroenterology, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Song Gao
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Key Laboratory of Marine Biological Resources and Environment, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, School of Pharmacy, Jiangsu Ocean University Lianyungang 222005 China
| | - Zeyang Zhou
- Department of General Surgery, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Xiaodong Yang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Yufei Xing
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Minhua Shi
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Yunyun Hu
- Department of Gastroenterology, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Wen Tang
- Department of Gastroenterology, The Second Affiliated Hospital of Soochow University Suzhou 215004 China
| | - Jun Xia
- Clinical Laboratory Center, Zhejiang Provincial People's Hospital Hangzhou Zhejiang 310014 China
| | - Xumin Zhang
- State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University Shanghai 200438 China
| | - Junhong Jiang
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University Suzhou 215006 China
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Soochow University Suzhou 215006 China
| | - Shuang Yang
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University Suzhou 215123 China
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3
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Kufleitner M, Haiber LM, Wittmann V. Metabolic glycoengineering - exploring glycosylation with bioorthogonal chemistry. Chem Soc Rev 2023; 52:510-535. [PMID: 36537135 DOI: 10.1039/d2cs00764a] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Glycans are involved in numerous biological recognition events. Being secondary gene products, their labeling by genetic methods - comparable to GFP labeling of proteins - is not possible. To overcome this limitation, metabolic glycoengineering (MGE, also known as metabolic oligosaccharide engineering, MOE) has been developed. In this approach, cells or organisms are treated with synthetic carbohydrate derivatives that are modified with a chemical reporter group. In the cytosol, the compounds are metabolized and incorporated into newly synthesized glycoconjugates. Subsequently, the reporter groups can be further derivatized in a bioorthogonal ligation reaction. In this way, glycans can be visualized or isolated. Furthermore, diverse targeting strategies have been developed to direct drugs, nanoparticles, or whole cells to a desired location. This review summarizes research in the field of MGE carried out in recent years. After an introduction to the bioorthogonal ligation reactions that have been used in in connection with MGE, an overview on carbohydrate derivatives for MGE is given. The last part of the review focuses on the many applications of MGE starting from mammalian cells to experiments with animals and other organisms.
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Affiliation(s)
- Markus Kufleitner
- Department of Chemistry and Konstanz Research School Chemical Biology (KoRS-CB), University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany.
| | - Lisa Maria Haiber
- Department of Chemistry and Konstanz Research School Chemical Biology (KoRS-CB), University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany.
| | - Valentin Wittmann
- Department of Chemistry and Konstanz Research School Chemical Biology (KoRS-CB), University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany.
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The Role of Histo-Blood Group Antigens and Microbiota in Human Norovirus Replication in Zebrafish Larvae. Microbiol Spectr 2022; 10:e0315722. [PMID: 36314930 PMCID: PMC9769672 DOI: 10.1128/spectrum.03157-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Human norovirus (HuNoV) is the major agent for viral gastroenteritis, causing >700 million infections yearly. Fucose-containing carbohydrates named histo-blood group antigens (HBGAs) are known (co)receptors for HuNoV. Moreover, bacteria of the gut microbiota expressing HBGA-like structures have shown an enhancing effect on HuNoV replication in an in vitro model. Here, we studied the role of HBGAs and the host microbiota during HuNoV infection in zebrafish larvae. Using whole-mount immunohistochemistry, we visualized the fucose expression in the zebrafish gut for the HBGA Lewis X [LeX, α(1,3)-fucose] and core fucose [α(1,6)-fucose]. Costaining of HuNoV-infected larvae proved colocalization of LeX and to a lower extent core fucose with the viral capsid protein VP1, indicating the presence of fucose residues on infected cells. Upon blocking of fucose expression by a fluorinated fucose analogue, HuNoV replication was strongly reduced. Furthermore, by comparing HuNoV replication in conventional and germfree zebrafish larvae, we found that the natural zebrafish microbiome does not have an effect on HuNoV replication, contrary to earlier reports about the human gut microbiome. Interestingly, monoassociation with the HBGA-expressing Enterobacter cloacae resulted in a minor decrease in HuNoV replication, which was not triggered by a stronger innate immune response. Overall, we show here that fucose has an essential role for HuNoV infection in zebrafish larvae, as in the human host, but their natural gut microbiome does not affect viral replication. IMPORTANCE Despite causing over 700 million infections yearly, many gaps remain in the knowledge of human norovirus (HuNoV) biology due to an historical lack of efficient cultivation systems. Fucose-containing carbohydrate structures, named histo-blood group antigens, are known to be important (co)receptors for viral entry in humans, while the natural gut microbiota is suggested to enhance viral replication. This study shows a conserved mechanism of entry for HuNoV in the novel zebrafish infection model, highlighting the pivotal opportunity this model represents to study entry mechanisms and identify the cellular receptor of HuNoV. Our results shed light on the interaction of HuNoV with the zebrafish microbiota, contributing to the understanding of the interplay between gut microbiota and enteric viruses. The ease of generating germfree animals that can be colonized with human gut bacteria is an additional advantage of using zebrafish larvae in virology. This small animal model constitutes an innovative alternative to high-severity animal models.
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Song WF, Yao WQ, Chen QW, Zheng D, Han ZY, Zhang XZ. In Situ Bioorthogonal Conjugation of Delivered Bacteria with Gut Inhabitants for Enhancing Probiotics Colonization. ACS CENTRAL SCIENCE 2022; 8:1306-1317. [PMID: 36188344 PMCID: PMC9523781 DOI: 10.1021/acscentsci.2c00533] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 06/16/2023]
Abstract
Clinical treatment efficacy of oral bacterial therapy has been largely limited by insufficient gut retention of probiotics. Here, we developed a bioorthogonal-mediated bacterial delivery strategy for enhancing probiotics colonization by modulating bacterial adhesion between probiotics and gut inhabitants. Metabolic amino acid engineering was applied to metabolically incorporate azido-decorated d-alanine into peptidoglycans of gut inhabitants, which could enable in situ bioorthogonal conjugation with dibenzocyclooctyne (DBCO)-modified probiotics. Both in vitro and in vivo studies demonstrated that the occurrence of the bioorthogonal reaction between azido- and DBCO-modified bacteria could result in obvious bacterial adhesion even in a complex physiological environment. DBCO-modified Clostridium butyricum (C. butyricum) also showed more efficient reservation in the gut and led to obvious disease relief in dextran sodium sulfate-induced colitis mice. This strategy highlights metabolically modified gut inhabitants as artificial reaction sites to bind with DBCO-decorated probiotics via bioorthogonal reactions, which shows great potential for enhancing bacterial colonization.
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6
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Fowler G, French DV, Rose A, Squires P, Aniceto da Silva C, Ohata S, Okamoto H, French CR. Protein fucosylation is required for Notch dependent vascular integrity in zebrafish. Dev Biol 2021; 480:62-68. [PMID: 34400136 DOI: 10.1016/j.ydbio.2021.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 12/19/2022]
Abstract
The onset of circulation in a developing embryo requires intact blood vessels to prevent hemorrhage. The development of endothelial cells, and their subsequent recruitment of perivascular mural cells are important processes to establish and maintain vascular integrity. These processes are genetically controlled during development, and mutations that affect endothelial cell specification, pattern formation, or maturation through the addition of mural cells can result in early developmental hemorrhage. We created a strong loss of function allele of the zebrafish GDP-mannose 4,6 dehydratase (gmds) gene that is required for the de novo synthesis of GDP-fucose, and homozygous embryos display cerebral hemorrhages. Our data demonstrate that gmds mutants have early defects in vascular patterning with ectopic branches observed at time of hemorrhage. Subsequently, defects in the number of mural cells that line the vasculature are observed. Moreover, activation of Notch signaling rescued hemorrhage phenotypes in gmds mutants, highlighting a potential downstream pathway that requires protein fucosylation for vascular integrity. Finally, supplementation with fucose can rescue hemorrhage frequency in gmds mutants, demonstrating that synthesis of GDP-fucose via an alternative (salvage) pathway may provide an avenue toward therapeutic correction of phenotypes observed due to defects in de novo GDP-fucose synthesis. Together, these data are consistent with a novel role for the de novo and salvage protein fucosylation pathways in regulating vascular integrity through a Notch dependent mechanism.
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Affiliation(s)
- Gerissa Fowler
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Danielle V French
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - April Rose
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Paige Squires
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Catarina Aniceto da Silva
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Shinya Ohata
- Molecular Cell Biology Laboratory, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, Tokyo, Japan
| | - Hitoshi Okamoto
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama, Japan
| | - Curtis R French
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
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7
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Cheng B, Tang Q, Zhang C, Chen X. Glycan Labeling and Analysis in Cells and In Vivo. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2021; 14:363-387. [PMID: 34314224 DOI: 10.1146/annurev-anchem-091620-091314] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As one of the major types of biomacromolecules in the cell, glycans play essential functional roles in various biological processes. Compared with proteins and nucleic acids, the analysis of glycans in situ has been more challenging. Herein we review recent advances in the development of methods and strategies for labeling, imaging, and profiling of glycans in cells and in vivo. Cellular glycans can be labeled by affinity-based probes, including lectin and antibody conjugates, direct chemical modification, metabolic glycan labeling, and chemoenzymatic labeling. These methods have been applied to label glycans with fluorophores, which enables the visualization and tracking of glycans in cells, tissues, and living organisms. Alternatively, labeling glycans with affinity tags has enabled the enrichment of glycoproteins for glycoproteomic profiling. Built on the glycan labeling methods, strategies enabling cell-selective and tissue-specific glycan labeling and protein-specific glycan imaging have been developed. With these methods and strategies, researchers are now better poised than ever to dissect the biological function of glycans in physiological or pathological contexts.
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Affiliation(s)
- Bo Cheng
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
- Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China
| | - Qi Tang
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
- Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China
| | - Che Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
- Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China
| | - Xing Chen
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
- Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing 100871, China
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8
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Liu Z, Liang Y, Cao W, Gao W, Tang B. Proximity-Induced Hybridization Chain Reaction-Based Photoacoustic Imaging System for Amplified Visualization Protein-Specific Glycosylation in Mice. Anal Chem 2021; 93:8915-8922. [PMID: 34143599 DOI: 10.1021/acs.analchem.1c01352] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycosylation is a key cellular mechanism that regulates several physiological and pathological functions. Therefore, identification and characterization of specific-protein glycosylation in vivo are highly desirable for studying glycosylation-related pathology and developing personalized theranostic modalities. Herein, we demonstrated a photoacoustic (PA) nanoprobe based on the proximity-induced hybridization chain reaction (HCR) for amplified visual detection of protein-specific glycosylation in vivo. Two kinds of functional DNA probes were designed. A glycan probe (DBCO-GP) was attached to glycans through metabolic oligosaccharide engineering (MOE) and protein probe (PP)-targeted proteins by aptamer recognition. Proximity-induced hybridization of the complementary domain between the two kinds of probes promoted conformational changes in the protein probes and in situ release of the HCR initiator domain. Gold nanoparticles (AuNPs) modified by complementary sequences (Au-H1 and Au-H2) self-assembled into Au aggregates via the HCR, thereby converting DNA signals to photoacoustic signals. Due to the high contrast and deep penetration of photoacoustic imaging, this strategy enabled in situ detection of Mucin 1 (MUC1)-specific glycosylation in mice with breast cancer and successfully monitored its dynamic states during tunicamycin treatment. This imaging technique provides a powerful platform for studying the effects of glycosylation on the protein structure and function, which helps to elucidate its role in disease processes.
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Affiliation(s)
- Zhenhua Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Biomedical Sciences, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Yuhua Liang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Biomedical Sciences, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Wenhua Cao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Biomedical Sciences, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Wen Gao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Biomedical Sciences, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Biomedical Sciences, Shandong Normal University, Jinan 250014, People's Republic of China
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9
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Qu Y, Dubiak KM, Peuchen EH, Champion MM, Zhang Z, Hebert AS, Wright S, Coon JJ, Huber PW, Dovichi NJ. Quantitative capillary zone electrophoresis-mass spectrometry reveals the N-glycome developmental plan during vertebrate embryogenesis. Mol Omics 2021; 16:210-220. [PMID: 32149324 DOI: 10.1039/d0mo00005a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Glycans are known to be involved in many biological processes, while little is known about the expression of N-glycans during vertebrate development. We now report the first quantitative studies of both the expression of N-linked glycans at six early development stages and the expression of N-glycosylated peptides at two early development stages in Xenopus laevis, the African clawed frog. N-Glycans were labeled with isobaric tandem mass tags, pooled, separated by capillary electrophoresis, and characterized using tandem mass spectrometry. We quantified 110 N-glycan compositions that spanned four orders of magnitude in abundance. Capillary electrophoresis was particularly useful in identifying charged glycans; over 40% of the observed glycan compositions were sialylated. The glycan expression was relatively constant until the gastrula-neurula transition (developmental stage 13), followed by massive reprogramming. An increase in oligomannosidic and a decrease in the paucimannosidic and phosphorylated oligomannosidic glycans were observed at the late tailbud stage (developmental stage 41). Two notable and opposing regulation events were detected for sialylated glycans. LacdiNAc and Lewis antigen features distinguished down-regulated sialylation from up-regulated species. The level of Lewis antigen decreased at later stages, which was validated by Aleuria aurantia lectin (AAL) and Ulex europaeus lectin (UEA-I) blots. We also used HPLC coupled with tandem mass spectrometry to identify 611 N-glycosylation sites on 350 N-glycoproteins at the early stage developmental stage 1 (fertilized egg), and 1682 N-glycosylation sites on 1023 N-glycoproteins at stage 41 (late tailbud stage). Over two thirds of the N-glycoproteins identified in the late tailbud stage are associated with neuron projection morphogenesis, suggesting a vital role of the N-glycome in neuronal development.
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Affiliation(s)
- Yanyan Qu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Kyle M Dubiak
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Elizabeth H Peuchen
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Matthew M Champion
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Zhenbin Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Alex S Hebert
- Departments of Chemistry and Biomolecular Chemistry, University of Wisconsin-Madison, WI 53706, USA
| | - Sarah Wright
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Joshua J Coon
- Departments of Chemistry and Biomolecular Chemistry, University of Wisconsin-Madison, WI 53706, USA
| | - Paul W Huber
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Norman J Dovichi
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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10
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Shajahan A, Supekar NT, Wu H, Wands AM, Bhat G, Kalimurthy A, Matsubara M, Ranzinger R, Kohler JJ, Azadi P. Mass Spectrometric Method for the Unambiguous Profiling of Cellular Dynamic Glycosylation. ACS Chem Biol 2020; 15:2692-2701. [PMID: 32809798 DOI: 10.1021/acschembio.0c00453] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Various biological processes at the cellular level are regulated by glycosylation which is a highly microheterogeneous post-translational modification (PTM) on proteins and lipids. The dynamic nature of glycosylation can be studied through metabolic incorporation of non-natural sugars into glycan epitopes and their detection using bio-orthogonal probes. However, this approach possesses a significant drawback due to nonspecific background reactions and ambiguity of non-natural sugar metabolism. Here, we report a probe-free strategy for their direct detection by glycoproteomics and glycomics using mass spectrometry (MS). The method dramatically simplifies the detection of non-natural functional group bearing monosaccharides installed through promiscuous sialic acid, N-acetyl-d-galactosamine (GalNAc) and N-acetyl-d-glucosamine (GlcNAc) biosynthetic pathways. Multistage enrichment of glycoproteins by cellular fractionation, subsequent ZIC-HILIC (zwitterionic-hydrophilic interaction chromatography) based glycopeptide enrichment, and a spectral enrichment algorithm for the MS data processing enabled direct detection of non-natural monosaccharides that are incorporated at low abundance on the N/O-glycopeptides along with their natural counterparts. Our approach allowed the detection of both natural and non-natural sugar bearing glycopeptides, N- and O-glycopeptides, differentiation of non-natural monosaccharide types on the glycans and also their incorporation efficiency through quantitation. Through this, we could deduce interconversion of monosaccharides during their processing through glycan salvage pathway and subsequent incorporation into glycan chains. The study of glycosylation dynamics through this method can be conducted in high throughput, as few sample processing steps are involved, enabling understanding of glycosylation dynamics under various external stimuli and thereby could bolster the use of metabolic glycan engineering in glycosylation functional studies.
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Affiliation(s)
- Asif Shajahan
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Nitin T. Supekar
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Han Wu
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Amberlyn M. Wands
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Ganapati Bhat
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Aravind Kalimurthy
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Masaaki Matsubara
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Rene Ranzinger
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Jennifer J. Kohler
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Parastoo Azadi
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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Abstract
In this review, we focus on the metabolism of mammalian glycan-associated monosaccharides, where the vast majority of our current knowledge comes from research done during the 1960s and 1970s. Most monosaccharides enter the cell using distinct, often tissue specific transporters from the SLC2A family. If not catabolized, these monosaccharides can be activated to donor nucleotide sugars and used for glycan synthesis. Apart from exogenous and dietary sources, all monosaccharides and their associated nucleotide sugars can be synthesized de novo, using mostly glucose to produce all nine nucleotide sugars present in human cells. Today, monosaccharides are used as treatment options for a small number of rare genetic disorders and even some common conditions. Here, we cover therapeutic applications of these sugars and highlight biochemical gaps that must be revisited as we go forward.
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Affiliation(s)
- Paulina Sosicka
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037, United States
| | - Bobby G. Ng
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037, United States
| | - Hudson H. Freeze
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037, United States
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12
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Jiang T, Laughlin ST. Enzyme- or light-triggered cyclopropenes for bioorthogonal ligation. Methods Enzymol 2020; 641:1-34. [PMID: 32713519 DOI: 10.1016/bs.mie.2020.04.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Since first reported at the beginning of the 21st century, bioorthogonal reactions have become powerful tools for investigating biological systems. Here, we review several classic and current bioorthogonal reactions, including the Staudinger-Bertozzi ligation, strain-promoted azide-alkyne cycloaddition (SPAAC), 1,3-dipolar cycloaddition, and tetrazine-alkene ligation. We discuss the capabilities and limitations of the subset of current bioorthogonal reactions that can be "turned on" by exposure to light or an enzyme. Finally, we focus on our recently developed turn-on cyclopropenes, which can be activated for reaction with tetrazines by exposure to light or enzymes, like nitroreductase, depending on the modular reaction caging group appended to the cyclopropene. We discuss the caged cyclopropene's molecular design and synthesis, and we discuss experiments to evaluate and verify reactivity both in vitro and in vivo.
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Affiliation(s)
- Ting Jiang
- Department of Chemistry, Stony Brook University, Stony Brook, NY, United States
| | - Scott T Laughlin
- Department of Chemistry, Stony Brook University, Stony Brook, NY, United States; Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, United States.
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13
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Soares da Costa D, Sousa JC, Dá Mesquita S, Petkova-Yankova NI, Marques F, Reis RL, Sousa N, Pashkuleva I. Bioorthogonal Labeling Reveals Different Expression of Glycans in Mouse Hippocampal Neuron Cultures during Their Development. Molecules 2020; 25:molecules25040795. [PMID: 32059500 PMCID: PMC7070308 DOI: 10.3390/molecules25040795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 01/01/2023] Open
Abstract
The expression of different glycans at the cell surface dictates cell interactions with their environment and other cells, being crucial for the cell fate. The development of the central nervous system is associated with tremendous changes in the cell glycome that is tightly regulated. Herein, we have employed bioorthogonal Cu-free click chemistry to image temporal distribution of different glycans in live mouse hippocampal neurons during their maturation in vitro. We show development-dependent glycan patterns with increased fucose and decreased mannose expression at the end of the maturation process. We also demonstrate that this approach is biocompatible and does not affect glycan transport although it relies on an administration of modified glycans. The applicability of this strategy to tissue sections unlocks new opportunities to study the glycan dynamics under more complex physiological conditions.
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Affiliation(s)
- Diana Soares da Costa
- 3B’s Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal; (N.I.P.-Y.); (R.L.R.)
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- Correspondence: (D.S.d.C.); (I.P.)
| | - João C. Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Guimarães, Portugal
| | - Sandro Dá Mesquita
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Guimarães, Portugal
| | - Nevena I. Petkova-Yankova
- 3B’s Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal; (N.I.P.-Y.); (R.L.R.)
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
| | - Fernanda Marques
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Guimarães, Portugal
| | - Rui L. Reis
- 3B’s Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal; (N.I.P.-Y.); (R.L.R.)
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Barco, 4805-017 Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- ICVS/3B’s—PT Government Associate Laboratory, 4710-057 Braga, Guimarães, Portugal
| | - Iva Pashkuleva
- 3B’s Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal; (N.I.P.-Y.); (R.L.R.)
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal; (J.C.S.); (S.D.M.); (F.M.); n (N.S.)
- Correspondence: (D.S.d.C.); (I.P.)
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14
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Hong S, Sahai-Hernandez P, Chapla DG, Moremen KW, Traver D, Wu P. Direct Visualization of Live Zebrafish Glycans via Single-Step Metabolic Labeling with Fluorophore-Tagged Nucleotide Sugars. Angew Chem Int Ed Engl 2019; 58:14327-14333. [PMID: 31295389 PMCID: PMC6820142 DOI: 10.1002/anie.201907410] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Indexed: 12/12/2022]
Abstract
Dynamic turnover of cell-surface glycans is involved in a myriad of biological events, making this process an attractive target for in vivo molecular imaging. Metabolic glycan labeling coupled with bioorthogonal chemistry has paved the way for visualizing glycans in living organisms. However, a two-step labeling sequence is required, which suffers from the tissue-penetration difficulties of the imaging probes. Here, by exploring the substrate promiscuity of endogenous glycosyltransferases, we developed a single-step fluorescent glycan labeling strategy by using fluorophore-tagged analogues of the nucleotide sugars. Injecting fluorophore-tagged sialic acid and fucose into the yolk of zebrafish embryos at the one-cell stage enables systematic imaging of sialylation and fucosylation in live zebrafish embryos at distinct developmental stages. From these studies, we obtained insights into the role of sialylated and fucosylated glycans in zebrafish hematopoiesis.
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Affiliation(s)
- Senlian Hong
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Pankaj Sahai-Hernandez
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, 92037, USA
| | | | - Kelley W Moremen
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, 30602, USA
| | - David Traver
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, 92037, USA
| | - Peng Wu
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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15
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Mouterde LM, Stewart JD. Application of Acetyl-CoA synthetase from Methanothermobacter thermautotrophicus to non-native substrates. Enzyme Microb Technol 2019; 128:67-71. [DOI: 10.1016/j.enzmictec.2019.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/08/2019] [Accepted: 05/13/2019] [Indexed: 10/26/2022]
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16
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Hong S, Sahai‐Hernandez P, Chapla DG, Moremen KW, Traver D, Wu P. Direct Visualization of Live Zebrafish Glycans via Single‐Step Metabolic Labeling with Fluorophore‐Tagged Nucleotide Sugars. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907410] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Senlian Hong
- Department of Molecular Medicine The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Pankaj Sahai‐Hernandez
- Department of Cellular and Molecular Medicine University of California at San Diego La Jolla CA 92037 USA
| | | | - Kelley W. Moremen
- Complex Carbohydrate Research Center University of Georgia Athens GA 30602 USA
| | - David Traver
- Department of Cellular and Molecular Medicine University of California at San Diego La Jolla CA 92037 USA
| | - Peng Wu
- Department of Molecular Medicine The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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17
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Wen X, Yuan B, Zhang J, Meng X, Guo Q, Li L, Li Z, Jiang H, Wang K. Enhanced visualization of cell surface glycans via a hybridization chain reaction. Chem Commun (Camb) 2019; 55:6114-6117. [DOI: 10.1039/c9cc02069a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We apply a DNA hybridization chain reaction (HCR) to achieve sensitively amplified imaging of cell surface glycosylation.
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Affiliation(s)
- Xiaohong Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Baoyin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Junxun Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Xiangxian Meng
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Qiuping Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Lie Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Zenghui Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Huishan Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
- Changsha 410082
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18
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Ng BG, Rosenfeld JA, Emrick L, Jain M, Burrage LC, Lee B, Craigen WJ, Bearden DR, Graham BH, Freeze HH, Freeze HH. Pathogenic Variants in Fucokinase Cause a Congenital Disorder of Glycosylation. Am J Hum Genet 2018; 103:1030-1037. [PMID: 30503518 DOI: 10.1016/j.ajhg.2018.10.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 10/25/2018] [Indexed: 01/20/2023] Open
Abstract
FUK encodes fucokinase, the only enzyme capable of converting L-fucose to fucose-1-phosphate, which will ultimately be used for synthesizing GDP-fucose, the donor substrate for all fucosyltransferases. Although it is essential for fucose salvage, this pathway is thought to make only a minor contribution to the total amount of GDP-fucose. A second pathway, the major de novo pathway, involves conversion of GDP-mannose to GDP-fucose. Here we describe two unrelated individuals who have pathogenic variants in FUK and who presented with severe developmental delays, encephalopathy, intractable seizures, and hypotonia. The first individual was compound heterozygous for c.667T>C (p.Ser223Pro) and c.2047C>T (p.Arg683Cys), and the second individual was homozygous for c.2980A>C (p.Lys994Gln). Skin fibroblasts from the first individual confirmed the variants as loss of function and showed significant decreases in total GDP-[3H] fucose and [3H] fucose-1-phosphate. There was also a decrease in the incorporation of [5,6-3H]-fucose into fucosylated glycoproteins. Lys994 has previously been shown to be an important site for ubiquitin conjugation. Here, we show that loss-of-function variants in FUK cause a congenital glycosylation disorder characterized by a defective fucose-salvage pathway.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Hudson H Freeze
- Human Genetics Program, Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.
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19
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Yamakawa N, Vanbeselaere J, Chang LY, Yu SY, Ducrocq L, Harduin-Lepers A, Kurata J, Aoki-Kinoshita KF, Sato C, Khoo KH, Kitajima K, Guerardel Y. Systems glycomics of adult zebrafish identifies organ-specific sialylation and glycosylation patterns. Nat Commun 2018; 9:4647. [PMID: 30405127 PMCID: PMC6220181 DOI: 10.1038/s41467-018-06950-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 09/26/2018] [Indexed: 12/31/2022] Open
Abstract
The emergence of zebrafish Danio rerio as a versatile model organism provides the unique opportunity to monitor the functions of glycosylation throughout vertebrate embryogenesis, providing insights into human diseases caused by glycosylation defects. Using a combination of chemical modifications, enzymatic digestion and mass spectrometry analyses, we establish here the precise glycomic profiles of eight individual zebrafish organs and demonstrate that the protein glycosylation and glycosphingolipid expression patterns exhibits exquisite specificity. Concomitant expression screening of a wide array of enzymes involved in the synthesis and transfer of sialic acids shows that the presence of organ-specific sialylation motifs correlates with the localized activity of the corresponding glycan biosynthesis pathways. These findings provide a basis for the rational design of zebrafish lines expressing desired glycosylation profiles.
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Affiliation(s)
- Nao Yamakawa
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France.,Bioscience and Biotechnology Center, Nagoya University, Nagoya, 464-8601, Japan
| | - Jorick Vanbeselaere
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Lan-Yi Chang
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France.,Institute of Biological Chemistry, Academia Sinica, Taipei, 11529, Taiwan
| | - Shin-Yi Yu
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Lucie Ducrocq
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Anne Harduin-Lepers
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France
| | - Junichi Kurata
- Faculty of Science and Engineering, Soka University, Hachioji, Tokyo, 192-8577, Japan
| | | | - Chihiro Sato
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, 464-8601, Japan
| | - Kay-Hooi Khoo
- Institute of Biological Chemistry, Academia Sinica, Taipei, 11529, Taiwan
| | - Ken Kitajima
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, 464-8601, Japan
| | - Yann Guerardel
- Université de Lille, CNRS, UMR 8576 - UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F- 59000, Lille, France.
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20
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Xu W, Su P, Zheng L, Fan H, Wang Y, Liu Y, Lin Y, Zhi F. In vivo Imaging of a Novel Strain of Bacteroides fragilis via Metabolic Labeling. Front Microbiol 2018; 9:2298. [PMID: 30327642 PMCID: PMC6174215 DOI: 10.3389/fmicb.2018.02298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 09/07/2018] [Indexed: 12/14/2022] Open
Abstract
Non-toxigenic Bacteroides fragilis is regarded as a potential candidate for probiotic owing to its various advantages. We previously isolated a new strain of B. fragilis (ZY-312) and verified its biosafety and capability of inhibiting the growth of pathogens in vivo. However, the colonization of ZY-312 in gastrointestinal (GI) tract remains to be determined. To track the colonization of ZY-312, mice were gavaged with ZY-312 labeled by means of metabolic oligosaccharide engineering and bioorthogonal click chemistry or given AF647-dibenzocyclooctyne (DIBO) directly. Then the fluorescence was detected in GI tract, spleen and kidneys. Results showed that ZY-312 could be labeled by metabolic oligosaccharide engineering, and the optimal incubation time with AF647-DIBO was 5 h in vitro. Following oral gavage with AF647-DIBO labeled ZY-312 or AF647-DIBO alone, mice were subjected to in vivo imaging and the fluorescence intensity was similar in both groups 3 h, 6 h, and 12 h post the gavage. The fluorescence of AF647-DIBO group disappeared 24 h post gavage which was probably due to the excretion via GI tract. While the fluorescence of AF647-DIBO labeled ZY-312 retained in the cecum for as long as 48 h. Immunofluorescence assay further confirmed that labeled ZY-312 transiently colonized not only in cecum but also in stomach, ileum and colon of mice 48 h post-gavage and that no massive accumulation of ZY-312 was detected in other organs such as kidneys and spleen. In conclusion, ZY-312 could transiently colonize in GI tract, mainly in cecum, for at least 48 h, and it hardly disseminate to other organs, which shed new light on the future development of B. fragilis as a probiotic product.
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Affiliation(s)
- Wenye Xu
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Institute of Gastroenterology of Guangdong Province, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Peizhu Su
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Institute of Gastroenterology of Guangdong Province, Nanfang Hospital, Southern Medical University, Guangzhou, China.,Department of Gastroenterology, First People's Hospital of Foshan Affiliated to Sun Yat-sen University, Foshan, China
| | - Lijun Zheng
- Guangzhou Zhiyi Biotechnology Co., Ltd., Guangzhou, China
| | - Hongying Fan
- Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Ye Wang
- Guangzhou Zhiyi Biotechnology Co., Ltd., Guangzhou, China
| | - Yangyang Liu
- Guangzhou Zhiyi Biotechnology Co., Ltd., Guangzhou, China
| | - Yuqing Lin
- Guangzhou Zhiyi Biotechnology Co., Ltd., Guangzhou, China
| | - Fachao Zhi
- Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Institute of Gastroenterology of Guangdong Province, Nanfang Hospital, Southern Medical University, Guangzhou, China
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21
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Gilormini PA, Batt AR, Pratt MR, Biot C. Asking more from metabolic oligosaccharide engineering. Chem Sci 2018; 9:7585-7595. [PMID: 30393518 PMCID: PMC6187459 DOI: 10.1039/c8sc02241k] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 09/17/2018] [Indexed: 01/20/2023] Open
Abstract
Metabolic Oligosaccharide Engineering (MOE) is a groundbreaking strategy which has been largely used in the last decades, as a powerful strategy for glycans understanding. The present review aims to highlight recent studies that are pushing the boundaries of MOE applications.
Glycans form one of the four classes of biomolecules, are found in every living system and present a huge structural and functional diversity. As an illustration of this diversity, it has been reported that more than 50% of the human proteome is glycosylated and that 2% of the human genome is dedicated to glycosylation processes. Glycans are involved in many biological processes such as signalization, cell–cell or host pathogen interactions, immunity, etc. However, fundamental processes associated with glycans are not yet fully understood and the development of glycobiology is relatively recent compared to the study of genes or proteins. Approximately 25 years ago, the studies of Bertozzi's and Reutter's groups paved the way for metabolic oligosaccharide engineering (MOE), a strategy which consists in the use of modified sugar analogs which are taken up into the cells, metabolized, incorporated into glycoconjugates, and finally detected in a specific manner. This groundbreaking strategy has been widely used during the last few decades and the concomitant development of new bioorthogonal ligation reactions has allowed many advances in the field. Typically, MOE has been used to either visualize glycans or identify different classes of glycoproteins. The present review aims to highlight recent studies that lie somewhat outside of these more traditional approaches and that are pushing the boundaries of MOE applications.
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Affiliation(s)
- Pierre-André Gilormini
- University of Lille , CNRS UMR 8576 , UGSF - Unité de Glycobiologie Structurale et Fonctionnelle , F-59000 Lille , France .
| | - Anna R Batt
- Department of Chemistry , University of Southern California , 840 Downey Way , LJS 250 Los Angeles , CA 90089 , USA
| | - Matthew R Pratt
- Department of Chemistry , University of Southern California , 840 Downey Way , LJS 250 Los Angeles , CA 90089 , USA.,Department of Biological Sciences , University of Southern California , 840 Downey Way , LJS 250 Los Angeles , CA 90089 , USA
| | - Christophe Biot
- University of Lille , CNRS UMR 8576 , UGSF - Unité de Glycobiologie Structurale et Fonctionnelle , F-59000 Lille , France .
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22
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Park DD, Xu G, Wong M, Phoomak C, Liu M, Haigh NE, Wongkham S, Yang P, Maverakis E, Lebrilla CB. Membrane glycomics reveal heterogeneity and quantitative distribution of cell surface sialylation. Chem Sci 2018; 9:6271-6285. [PMID: 30123482 PMCID: PMC6063140 DOI: 10.1039/c8sc01875h] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 06/26/2018] [Indexed: 12/13/2022] Open
Abstract
Sialic acid distribution was quantified by LC-MS/MS. The number of sialylated glycoforms increases at sites nearest to the transmembrane domain.
Given that unnatural sugar expression is metabolically achieved, the kinetics and disposition of incorporation can lend insight into the temporal and localization preferences of sialylation across the cell surface. However, common detection schemes lack the ability to detail the molecular diversity and distribution of target moieties. Here we employed a mass spectrometric approach to trace the placement of azido sialic acids on membrane glycoconjugates, which revealed substantial variations in incorporation efficiencies between N-/O-glycans, glycosites, and glycosphingolipids. To further explore the propensity for sialylation, we subsequently mapped the native glycome of model epithelial cell surfaces and illustrate that while glycosylation sites span broadly across the extracellular region, a higher number of heterogeneous glycoforms occur on sialylated sites closest to the transmembrane domain. Beyond imaging techniques, this integrative approach provides unprecedented details about the frequency and structure-specific distribution of cell surface sialylation, a critical feature that regulates cellular interactions and homeostatic pathways.
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Affiliation(s)
- Diane Dayoung Park
- Department of Chemistry , University of California , Davis , CA 95616 , USA.,Department of Surgery , Beth Israel Deaconess Medical Center , Harvard Medical School , Boston , MA 02115 , USA .
| | - Gege Xu
- Department of Chemistry , University of California , Davis , CA 95616 , USA
| | - Maurice Wong
- Department of Chemistry , University of California , Davis , CA 95616 , USA
| | - Chatchai Phoomak
- Department of Biochemistry , Faculty of Medicine , Khon Kaen University , Khon Kaen 40002 , Thailand
| | - Mingqi Liu
- Department of Chemistry , Institutes of Biomedical Sciences , Fudan University , Shanghai 200032 , China
| | - Nathan E Haigh
- Department of Dermatology , University of California , Davis School of Medicine , Sacramento , CA 95817 , USA
| | - Sopit Wongkham
- Department of Biochemistry , Faculty of Medicine , Khon Kaen University , Khon Kaen 40002 , Thailand
| | - Pengyuan Yang
- Department of Chemistry , Institutes of Biomedical Sciences , Fudan University , Shanghai 200032 , China
| | - Emanual Maverakis
- Department of Dermatology , University of California , Davis School of Medicine , Sacramento , CA 95817 , USA
| | - Carlito B Lebrilla
- Department of Chemistry , University of California , Davis , CA 95616 , USA
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23
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Pickens CJ, Johnson SN, Pressnall MM, Leon MA, Berkland CJ. Practical Considerations, Challenges, and Limitations of Bioconjugation via Azide-Alkyne Cycloaddition. Bioconjug Chem 2018; 29:686-701. [PMID: 29287474 PMCID: PMC6310217 DOI: 10.1021/acs.bioconjchem.7b00633] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interrogating biological systems is often limited by access to biological probes. The emergence of "click chemistry" has revolutionized bioconjugate chemistry by providing facile reaction conditions amenable to both biologic molecules and small molecule probes such as fluorophores, toxins, or therapeutics. One particularly popular version is the copper-catalyzed azide-alkyne cycloaddition (AAC) reaction, which has spawned new alternatives such as the strain-promoted azide-alkyne cycloaddition reaction, among others. This focused review highlights practical approaches to AAC reactions for the synthesis of peptide or protein bioconjugates and contrasts current challenges and limitations in light of recent advances in the field. The conical success of antibody drug conjugates has expanded the toolbox of linkers and payloads to facilitate practical applications of bioconjugation to create novel therapeutics and biologic probes. The AAC reaction in particular is poised to enable a large set of functionalized molecules as a combinatorial approach to high-throughput bioconjugate generation, screening, and honing of lead compounds.
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Affiliation(s)
- Chad J Pickens
- Department of Pharmaceutical Chemistry , University of Kansas , 2095 Constant Avenue , Lawrence , Kansas 66047 , United States
| | - Stephanie N Johnson
- Department of Pharmaceutical Chemistry , University of Kansas , 2095 Constant Avenue , Lawrence , Kansas 66047 , United States
| | - Melissa M Pressnall
- Department of Pharmaceutical Chemistry , University of Kansas , 2095 Constant Avenue , Lawrence , Kansas 66047 , United States
| | - Martin A Leon
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66047 , United States
| | - Cory J Berkland
- Department of Pharmaceutical Chemistry , University of Kansas , 2095 Constant Avenue , Lawrence , Kansas 66047 , United States
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66047 , United States
- Department of Chemical and Petroleum Engineering , University of Kansas , , 4132 Learned Hall, 1530 W. 15th , Lawrence , Kansas 66045 , United States
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24
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Sun Y, Hong S, Xie R, Huang R, Lei R, Cheng B, Sun D, Du Y, Nycholat CM, Paulson JC, Chen X. Mechanistic Investigation and Multiplexing of Liposome-Assisted Metabolic Glycan Labeling. J Am Chem Soc 2018; 140:3592-3602. [PMID: 29446631 PMCID: PMC6031147 DOI: 10.1021/jacs.7b10990] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Metabolic labeling of glycans with bioorthogonal reporters has been widely used for glycan imaging and glycoproteomic profiling. One of the intrinsic limitations of metabolic glycan labeling is the lack of cell-type selectivity. The recently developed liposome-assisted bioorthogonal reporter (LABOR) strategy provides a promising means to overcome this limitation, but the mechanism of LABOR has not been investigated in detail. In this work, we performed a mechanistic study on LABOR and explored its multiplexing capability. Our studies support an endocytosis-salvage mechanism. The ligand-targeted liposomes encapsulating azidosugars are internalized into the endosome via the receptor-mediated endocytosis. Unlike the conventional drug delivery, LABOR does not rely on the endosomal escape pathways. Rather, the liposomes are allowed to enter the lysosome, inside which the azidosugars are released from the liposomes. The released azidosugars then intercept the salvage pathways of monosaccharides and get transported into the cytosol by lysosomal sugar transporters. Based on this mechanism, we expanded the scope of LABOR by evaluating a series of ligand-receptor pairs for targeting sialoglycans in various cell types. Different ligand types including small molecules, antibodies, aptamers, and peptides could be easily implemented into LABOR. Finally, we demonstrated that the sialoglycans in two distinct cell populations in a co-cultured system could be selectively labeled with two distinct chemical reporters by performing a multiplexed LABOR labeling.
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Affiliation(s)
- Yuting Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Senlian Hong
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Ran Xie
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Rongbing Huang
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ruoxing Lei
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Bo Cheng
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Deen Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yifei Du
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Corwin M. Nycholat
- Departments of Molecular Medicine and Immunology & Microbiology, The Scripps Research Institute, La Jolla, California 92037, United States
| | - James C. Paulson
- Departments of Molecular Medicine and Immunology & Microbiology, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Xing Chen
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China
- Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing 100871, China
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25
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Alcaraz N, Liu Q, Hanssen E, Johnston A, Boyd BJ. Clickable Cubosomes for Antibody-Free Drug Targeting and Imaging Applications. Bioconjug Chem 2017; 29:149-157. [PMID: 29182866 DOI: 10.1021/acs.bioconjchem.7b00659] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The combination of copper-free click chemistry with metabolic labeling offers new opportunities in drug delivery. The objective of this study was to determine whether cubosomes functionalized with azide or dibenzocyclooctyne (DBCO) groups are able to undergo copper-free click chemistry with a strained cyclooctyne or azide, respectively. Phytantriol-based cubosomes were functionalized using phospholipids bearing an azide or DBCO group. The modified cubosome dispersions were characterized using dynamic light scattering, cryo-TEM, and small-angle X-ray scattering. The efficiency of "clickability" was assessed by reacting the cubosomes with a complementary dye and determining bound and unbound dye via size exclusion chromatography. The clickable cubosomes reacted specifically and efficiently with a click-Cy5 dye with minor changes to the size, shape, and structure of the cubosomes. This indicates that cubosomes can retain their unique internal structure while participating in copper-free click chemistry. This proof of concept study paves the way for the use of copper-free click chemistry and metabolic labeling with cubosomes for targeted drug delivery and imaging.
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Affiliation(s)
- Nicolas Alcaraz
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Science, Monash University , Parkville, VIC 3052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Parkville, VIC 3052, Australia
| | - Qingtao Liu
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Science, Monash University , Parkville, VIC 3052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Parkville, VIC 3052, Australia
| | - Eric Hanssen
- Advanced Microscopy Unit, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , Parkville, VIC 3052, Australia
| | - Angus Johnston
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Science, Monash University , Parkville, VIC 3052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Parkville, VIC 3052, Australia
| | - Ben J Boyd
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Science, Monash University , Parkville, VIC 3052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences , Parkville, VIC 3052, Australia
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26
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Witten AJ, Ejendal KFK, Gengelbach LM, Traore MA, Wang X, Umulis DM, Calve S, Kinzer-Ursem TL. Fluorescent imaging of protein myristoylation during cellular differentiation and development. J Lipid Res 2017; 58:2061-2070. [PMID: 28754825 PMCID: PMC5625117 DOI: 10.1194/jlr.d074070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 07/26/2017] [Indexed: 11/20/2022] Open
Abstract
Protein post-translational modifications (PTMs) serve to give proteins new cellular functions and can influence spatial distribution and enzymatic activity, greatly enriching the complexity of the proteome. Lipidation is a PTM that regulates protein stability, function, and subcellular localization. To complement advances in proteomic identification of lipidated proteins, we have developed a method to image the spatial distribution of proteins that have been co- and post-translationally modified via the addition of myristic acid (Myr) to the N terminus. In this work, we use a Myr analog, 12-azidododecanoic acid (12-ADA), to facilitate fluorescent detection of myristoylated proteins in vitro and in vivo. The azide moiety of 12-ADA does not react to natural biological chemistries, but is selectively reactive with alkyne functionalized fluorescent dyes. We find that the spatial distribution of myristoylated proteins varies dramatically between undifferentiated and differentiated muscle cells in vitro. Further, we demonstrate that our methodology can visualize the distribution of myristoylated proteins in zebrafish muscle in vivo. Selective protein labeling with noncanonical fatty acids, such as 12-ADA, can be used to determine the biological function of myristoylation and other lipid-based PTMs and can be extended to study deregulated protein lipidation in disease states.
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Affiliation(s)
- Andrew J Witten
- Weldon School of Biomedical Engineering Purdue University, West Lafayette, IN
| | - Karin F K Ejendal
- Weldon School of Biomedical Engineering Purdue University, West Lafayette, IN
| | | | - Meghan A Traore
- Weldon School of Biomedical Engineering Purdue University, West Lafayette, IN
| | - Xu Wang
- Agricultural and Biological Engineering, Purdue University, West Lafayette, IN
| | - David M Umulis
- Weldon School of Biomedical Engineering Purdue University, West Lafayette, IN
- Agricultural and Biological Engineering, Purdue University, West Lafayette, IN
| | - Sarah Calve
- Weldon School of Biomedical Engineering Purdue University, West Lafayette, IN
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27
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Hanzawa K, Suzuki N, Natsuka S. Structures and developmental alterations of N-glycans of zebrafish embryos. Glycobiology 2017; 27:228-245. [PMID: 27932382 DOI: 10.1093/glycob/cww124] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 12/02/2016] [Indexed: 12/16/2022] Open
Abstract
Zebrafish is a model organism suitable for studying vertebrate development. We analyzed the N-glycan structures of zebrafish embryos and their alterations during zebrafish embryogenesis to obtain basic data for studying the roles of N-glycosylation. Multiple modes of high-performance liquid chromatography and multistage mass spectrometry were used for structural analysis of N-glycans. The N-glycans from deyolked embryos at 36 hours postfertilization, a mid-pharyngula stage, contained relatively higher amounts of complex- and hybrid-type glycans with LacNAc (Galβ1-4GlcNAc) and/or sialyl LacNAc without additional β1,4-Gal, which are commonly found in mammalian tissues, as well as abundant oligomannose-type glycans. Some of the complex- and hybrid-type glycans possessed various extended LacNAc structures, such as Galβ1-4LacNAc, LacNAc-repeat or unique (+/- dHex)-GalNAcα1-GlcNAcβ1-LacNAc. In contrast, the yolk of the embryo contains predominant oligomannose-type glycans and complex-type glycans with Galβ1-4(Siaα2-3)Galβ1-4(Fucα1-3)GlcNAc antennae. N-Glycan profiles obtained from deyolked embryos at different stages showed stage-dependent variation of complex- and hybrid-type glycans. At gastrula and early segmentation stages, complex- and hybrid-type glycans were minor components, and their antenna structures were mainly sialyl LacdiNAc (Siaα2-6GalNAcβ1-4GlcNAc). From the mid-segmentation to pharyngula stages, those with LacNAc and/or α2,6-sialyl LacNAc antenna structures increased remarkably, and those with α2,3-sialyl LacNAc antenna, core α1,6-Fuc and bisecting GlcNAc modifications increased gradually. These results suggest the presence of mechanisms for regulating the antenna structures of complex/hybrid N-glycan biosynthesis in the phylotypic stage of vertebrate development.
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Affiliation(s)
- Ken Hanzawa
- Department of Food and Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Noriko Suzuki
- Department of Food and Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan.,Department of Biology, Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan
| | - Shunji Natsuka
- Department of Food and Life Sciences, Graduate School of Science and Technology, Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan.,Department of Biology, Niigata University, 8050 Ikarashi-nino-cho, Nishi-ku, Niigata 950-2181, Japan
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28
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Reja RM, Sunny S, Gopi HN. Chemoselective Nitrile Oxide-Alkyne 1,3-Dipolar Cycloaddition Reactions from Nitroalkane-Tethered Peptides. Org Lett 2017. [PMID: 28631487 DOI: 10.1021/acs.orglett.7b01498] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Synthesis and incorporation of a new amino acid with a nitroalkane side chain into peptides, in situ transformation of a nitroalkane side chain into nitrile oxide, and chemoselective 1,3-dipolar cycloaddition reactions between in situ generated nitrile oxide and different alkynes are reported. The nitroalkane-mediated nitrile oxide-alkyne cycloaddition was found to be orthogonal to the copper(I)-catalyzed azide-alkyne cycloaddition reaction. The combination of orthogonal nitrile oxide-alkyne and azide-alkyne cycloaddition reactions can be explored to tailor different 1,2,3-triazole and 3,5-isoxazoles, respectively, on the peptide backbone.
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Affiliation(s)
- Rahi M Reja
- Department of Chemistry, Indian Institute of Science Education and Research , Dr. Homi Bhabha Road, Pune 411 008, India
| | - Sereena Sunny
- Department of Chemistry, Indian Institute of Science Education and Research , Dr. Homi Bhabha Road, Pune 411 008, India
| | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research , Dr. Homi Bhabha Road, Pune 411 008, India
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29
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Aguilar AL, Briard JG, Yang L, Macauley MS, Wu P. Tools for Studying Glycans: Recent Advances in Chemoenzymatic Glycan Labeling. ACS Chem Biol 2017; 12:611-621. [PMID: 28301937 PMCID: PMC5469623 DOI: 10.1021/acschembio.6b01089] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The study of cellular glycosylation presents many challenges due, in large part, to the nontemplated nature of glycan biosynthesis and glycans' structural complexity. Chemoenzymatic glycan labeling (CeGL) has emerged as a new technique to address the limitations of existing methods for glycan detection. CeGL combines glycosyltransferases and unnatural nucleotide sugar donors equipped with a bioorthogonal chemical tag to directly label specific glycan acceptor substrates in situ within biological samples. This article reviews the current CeGL strategies that are available to characterize cell-surface and intracellular glycans. Applications include imaging glycan expression status in live cells and tissue samples, proteomic analysis of glycoproteins, and target validation. Combined with genetic and biochemical tools, CeGL provides new opportunities to elucidate the functional roles of glycans in human health and disease.
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Affiliation(s)
- Aime Lopez Aguilar
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California 92037
| | - Jennie Grace Briard
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California 92037
| | - Linette Yang
- Vassar College, 124 Raymond Ave, Poughkeepsie, NY 12604
| | - Matthew Scott Macauley
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California 92037
| | - Peng Wu
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California 92037
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30
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Sminia TJ, Zuilhof H, Wennekes T. Getting a grip on glycans: A current overview of the metabolic oligosaccharide engineering toolbox. Carbohydr Res 2016; 435:121-141. [PMID: 27750120 DOI: 10.1016/j.carres.2016.09.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 12/16/2022]
Abstract
This review discusses the advances in metabolic oligosaccharide engineering (MOE) from 2010 to 2016 with a focus on the structure, preparation, and reactivity of its chemical probes. A brief historical overview of MOE is followed by a comprehensive overview of the chemical probes currently available in the MOE molecular toolbox and the bioconjugation techniques they enable. The final part of the review focusses on the synthesis of a selection of probes and finishes with an outlook on recent and potential upcoming advances in the field of MOE.
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Affiliation(s)
- Tjerk J Sminia
- Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Tom Wennekes
- Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands; Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands.
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31
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Shah L, Laughlin ST, Carrico IS. Light-Activated Staudinger-Bertozzi Ligation within Living Animals. J Am Chem Soc 2016; 138:5186-9. [PMID: 27010217 DOI: 10.1021/jacs.5b13401] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ability to regulate small molecule chemistry in vivo will enable new avenues of exploration in imaging and pharmacology. However, realization of these goals will require reactions with high specificity and precise control. Here we demonstrate photocontrol over the highly specific Staudinger-Bertozzi ligation in vitro and in vivo. Our simple approach, photocaging the key phosphine atom, allows for the facile production of reagents with photochemistry that can be engineered for specific applications. The resulting compounds, which are both stable and efficiently activated, enable the spatial labeling of metabolically introduced azides in vitro and on live zebrafish.
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Affiliation(s)
- Lisa Shah
- Department of Chemistry and ‡Institute of Chemical Biology and Drug Discovery, State University of New York Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Scott T Laughlin
- Department of Chemistry and ‡Institute of Chemical Biology and Drug Discovery, State University of New York Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Isaac S Carrico
- Department of Chemistry and ‡Institute of Chemical Biology and Drug Discovery, State University of New York Stony Brook , Stony Brook, New York 11794-3400, United States
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32
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Gutmann M, Memmel E, Braun AC, Seibel J, Meinel L, Lühmann T. Biocompatible Azide-Alkyne "Click" Reactions for Surface Decoration of Glyco-Engineered Cells. Chembiochem 2016; 17:866-75. [PMID: 26818821 DOI: 10.1002/cbic.201500582] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Indexed: 11/09/2022]
Abstract
Bio-orthogonal copper (I)-catalyzed azide-alkyne cycloaddition (CuAAC) has been widely used to modify azide- or alkyne-bearing monosaccharides on metabolic glyco-engineered mammalian cells. Here, we present a systematic study to elucidate the design space for the cytotoxic effects of the copper catalyst on NIH 3T3 fibroblasts and on HEK 293-F cells. Monitoring membrane integrity by flow cytometry and RT-PCR analysis with apoptotic and anti-apoptotic markers elucidated the general feasibility of CuAAC, with exposure time of the CuAAC reaction mixture having the major influence on biocompatibility. A high labeling efficiency of HEK 293-F cells with a fluorescent alkyne dye was rapidly achieved by CuAAC in comparison to copper free strain-promoted azide-alkyne cycloaddition (SPAAC). The study details effective and biocompatible conditions for CuAAC-based modification of glyco-engineered cells in comparison to its copper free alternative.
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Affiliation(s)
- Marcus Gutmann
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Elisabeth Memmel
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexandra C Braun
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jürgen Seibel
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Tessa Lühmann
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.
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33
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Piller F, Mongis A, Piller V. Metabolic Glyco-Engineering in Eukaryotic Cells and Selected Applications. Methods Mol Biol 2016; 1321:335-59. [PMID: 26082233 DOI: 10.1007/978-1-4939-2760-9_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
By metabolic glyco-engineering cellular glycoconjugates are modified through the incorporation of synthetic monosaccharides which are usually analogues of naturally present sugars. In order to get incorporated, the monosaccharides need to enter the cytoplasm and to be substrates for the enzymes necessary for their transformation into activated sugars, most often nucleotide sugars. These have to be substrates for glycosyltransferases which finally catalyze their incorporation into glycans. Such pathways are difficult to reconstitute in vitro and therefore new monosaccharide analogues have to be tested in tissue culture for their suitability in metabolic glyco-engineering. For this, glycosylation mutants are the most appropriate since they are unable to synthesize specific glycans but through the introduction of the monosaccharide analogues they may express some glycans at the cell surface with the unnatural sugar incorporated. The presence of those glycans can be easily and quantitatively detected by lectin binding or by chemical methods identifying specific sugars. Monosaccharide analogues can also block the pathways leading to sugar incorporation, thus inhibiting the synthesis of glycan structures which is also easily detectable at the cell surface by lectin labeling. The most useful and most frequently employed application of metabolic glyco-engineering is the introduction of reactive groups which can undergo bio-orthogonal click reactions for the efficient labeling of glycans at the surface of live cells.
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Affiliation(s)
- Friedrich Piller
- Synthetic Protein Chemistry and Glyco-engineering Group, Centre de Biophysique Moléculaire (CNRS UPR 4301), Orléans, France
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34
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Dumont M, Lehner A, Vauzeilles B, Malassis J, Marchant A, Smyth K, Linclau B, Baron A, Mas Pons J, Anderson CT, Schapman D, Galas L, Mollet JC, Lerouge P. Plant cell wall imaging by metabolic click-mediated labelling of rhamnogalacturonan II using azido 3-deoxy-D-manno-oct-2-ulosonic acid. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 85:437-47. [PMID: 26676799 DOI: 10.1111/tpj.13104] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 11/23/2015] [Accepted: 11/27/2015] [Indexed: 05/10/2023]
Abstract
In plants, 3-deoxy-d-manno-oct-2-ulosonic acid (Kdo) is a monosaccharide that is only found in the cell wall pectin, rhamnogalacturonan-II (RG-II). Incubation of 4-day-old light-grown Arabidopsis seedlings or tobacco BY-2 cells with 8-azido 8-deoxy Kdo (Kdo-N3 ) followed by coupling to an alkyne-containing fluorescent probe resulted in the specific in muro labelling of RG-II through a copper-catalysed azide-alkyne cycloaddition reaction. CMP-Kdo synthetase inhibition and competition assays showing that Kdo and D-Ara, a precursor of Kdo, but not L-Ara, inhibit incorporation of Kdo-N3 demonstrated that incorporation of Kdo-N3 occurs in RG-II through the endogenous biosynthetic machinery of the cell. Co-localisation of Kdo-N3 labelling with the cellulose-binding dye calcofluor white demonstrated that RG-II exists throughout the primary cell wall. Additionally, after incubating plants with Kdo-N3 and an alkynated derivative of L-fucose that incorporates into rhamnogalacturonan I, co-localised fluorescence was observed in the cell wall in the elongation zone of the root. Finally, pulse labelling experiments demonstrated that metabolic click-mediated labelling with Kdo-N3 provides an efficient method to study the synthesis and redistribution of RG-II during root growth.
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Affiliation(s)
- Marie Dumont
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Arnaud Lehner
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Boris Vauzeilles
- Institut de Chimie des Substances Naturelles (ICSN) UPR CNRS 2301, 91198, Gif-sur-Yvette, France
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) UMR CNRS 8182, Université de Paris Sud, 91405, Orsay, France
- Click4Tag, Zone Luminy Biotech, Case 922, 163 Avenue de Luminy, 13009, Marseille, France
| | - Julien Malassis
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Alan Marchant
- Centre for Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Kevin Smyth
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Bruno Linclau
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Aurélie Baron
- Institut de Chimie des Substances Naturelles (ICSN) UPR CNRS 2301, 91198, Gif-sur-Yvette, France
| | - Jordi Mas Pons
- Institut de Chimie des Substances Naturelles (ICSN) UPR CNRS 2301, 91198, Gif-sur-Yvette, France
| | - Charles T Anderson
- Department of Biology and Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA, USA
| | - Damien Schapman
- PRIMACEN, IRIB, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Ludovic Galas
- PRIMACEN, IRIB, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Jean-Claude Mollet
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Patrice Lerouge
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale (Glyco-MEV), EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
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35
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Villalobos JA, Yi BR, Wallace IS. 2-Fluoro-L-Fucose Is a Metabolically Incorporated Inhibitor of Plant Cell Wall Polysaccharide Fucosylation. PLoS One 2015; 10:e0139091. [PMID: 26414071 PMCID: PMC4587364 DOI: 10.1371/journal.pone.0139091] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/09/2015] [Indexed: 12/29/2022] Open
Abstract
The monosaccharide L-fucose (L-Fuc) is a common component of plant cell wall polysaccharides and other plant glycans, including the hemicellulose xyloglucan, pectic rhamnogalacturonan-I (RG-I) and rhamnogalacturonan-II (RG-II), arabinogalactan proteins, and N-linked glycans. Mutations compromising the biosynthesis of many plant cell wall polysaccharides are lethal, and as a result, small molecule inhibitors of plant cell wall polysaccharide biosynthesis have been developed because these molecules can be applied at defined concentrations and developmental stages. In this study, we characterize novel small molecule inhibitors of plant fucosylation. 2-fluoro-L-fucose (2F-Fuc) analogs caused severe growth phenotypes when applied to Arabidopsis seedlings, including reduced root growth and altered root morphology. These phenotypic defects were dependent upon the L-Fuc salvage pathway enzyme L-Fucose Kinase/ GDP-L-Fucose Pyrophosphorylase (FKGP), suggesting that 2F-Fuc is metabolically converted to the sugar nucleotide GDP-2F-Fuc, which serves as the active inhibitory molecule. The L-Fuc content of cell wall matrix polysaccharides was reduced in plants treated with 2F-Fuc, suggesting that this molecule inhibits the incorporation of L-Fuc into these polysaccharides. Additionally, phenotypic defects induced by 2F-Fuc treatment could be partially relieved by the exogenous application of boric acid, suggesting that 2F-Fuc inhibits RG-II biosynthesis. Overall, the results presented here suggest that 2F-Fuc is a metabolically incorporated inhibitor of plant cellular fucosylation events, and potentially suggest that other 2-fluorinated monosaccharides could serve as useful chemical probes for the inhibition of cell wall polysaccharide biosynthesis.
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Affiliation(s)
- Jose A. Villalobos
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Reno, Nevada, 89557, United States of America
| | - Bo R. Yi
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Reno, Nevada, 89557, United States of America
| | - Ian S. Wallace
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Reno, Nevada, 89557, United States of America
- * E-mail:
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36
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Agarwal P, Beahm BJ, Shieh P, Bertozzi CR. Systemic Fluorescence Imaging of Zebrafish Glycans with Bioorthogonal Chemistry. Angew Chem Int Ed Engl 2015; 54:11504-10. [PMID: 26230529 PMCID: PMC4694582 DOI: 10.1002/anie.201504249] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 06/15/2015] [Indexed: 01/01/2023]
Abstract
Vertebrate glycans constitute a large, important, and dynamic set of post-translational modifications that are notoriously difficult to manipulate and image. Although the chemical reporter strategy has been used in conjunction with bioorthogonal chemistry to image the external glycosylation state of live zebrafish and detect tumor-associated glycans in mice, the ability to image glycans systemically within a live organism has remained elusive. Here, we report a method that combines the metabolic incorporation of a cyclooctyne-functionalized sialic acid derivative with a ligation reaction of a fluorogenic tetrazine, allowing for the imaging of sialylated glycoconjugates within live zebrafish embryos.
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Affiliation(s)
- Paresh Agarwal
- Departments of Chemistry and Molecular and Cell Biology and Howard Hughes Medical Institute, University of California, Berkeley, B84 Hildebrand Hall, Berkeley, CA 94720 (USA)
| | - Brendan J Beahm
- Departments of Chemistry and Molecular and Cell Biology and Howard Hughes Medical Institute, University of California, Berkeley, B84 Hildebrand Hall, Berkeley, CA 94720 (USA)
| | - Peyton Shieh
- Departments of Chemistry and Molecular and Cell Biology and Howard Hughes Medical Institute, University of California, Berkeley, B84 Hildebrand Hall, Berkeley, CA 94720 (USA)
| | - Carolyn R Bertozzi
- Department of Chemistry and Howard Hughes Medical Institute, Stanford University, 333 Campus Drive, Stanford, CA 94305.
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37
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Sun W, Chu T. In vivo click reaction between Tc-99m-labeled azadibenzocyclooctyne-MAMA and 2-nitroimidazole-azide for tumor hypoxia targeting. Bioorg Med Chem Lett 2015; 25:4453-6. [PMID: 26358160 DOI: 10.1016/j.bmcl.2015.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 08/21/2015] [Accepted: 09/04/2015] [Indexed: 12/27/2022]
Abstract
The bioactivity of nitroimidazole in Tc-99m-labeled 2-nitroimidazole, a traditional solid tumor hypoxia-imaging agent for single photon emission computed tomography (SPECT), is reduced by the presence of large ligand and metallic radionuclide, exhibiting lower tumor-to-nontumor ratios. In an effort to solve this general problem, a pretargeting strategy based on click chemistry (strain-promoted cyclooctyne-azide cycloaddition) was applied. The functional click synthons were synthesized as pretargeting components: an azide group linked to 2-nitroimidazole (2NIM-Az) serves for tumor hypoxia-targeting and azadibenzocyclooctyne conjugated with monoamine monoamide dithiol ligand (AM) functions as radiolabeling and binding group to azides in vivo. 2NIM-triazole-MAMA was obtained from in vitro click reaction with a reaction rate constant of 0.98M(-1)s(-1). AM and 2NIM-triazole-MAMA were radiolabeled with Tc-99m. The hypoxia-pretargeting biodistribution was studied in Kunming mice bearing S180 tumor; (99m)Tc-AM and (99m)Tc-triazole-2NIM were used as blank control and conventional control. Compared to the control groups, the pretargeting experiment exhibits the best radio-uptake and retention in tumor, with higher tumor-to-muscle and tumor-to-blood ratios (up to 8.55 and 1.44 at 8h post-(99m)Tc-complex-injection, respectively). To some extent, the pretargeting strategy protects the bioactivity of nitroimidazole and therefore provides an innovative approach for the development of tumor hypoxia-SPECT imaging agents.
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Affiliation(s)
- Wenjing Sun
- Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Taiwei Chu
- Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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38
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Geva-Zatorsky N, Alvarez D, Hudak JE, Reading NC, Erturk-Hasdemir D, Dasgupta S, von Andrian UH, Kasper DL. In vivo imaging and tracking of host-microbiota interactions via metabolic labeling of gut anaerobic bacteria. Nat Med 2015; 21:1091-100. [PMID: 26280120 DOI: 10.1038/nm.3929] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 07/21/2015] [Indexed: 02/07/2023]
Abstract
The intestine is densely populated by anaerobic commensal bacteria. These microorganisms shape immune system development, but understanding of host-commensal interactions is hampered by a lack of tools for studying the anaerobic intestinal environment. We applied metabolic oligosaccharide engineering and bioorthogonal click chemistry to label various commensal anaerobes, including Bacteroides fragilis, a common and immunologically important commensal. We studied the dissemination of B. fragilis after acute peritonitis and characterized the interactions of the intact microbe and its polysaccharide components in myeloid and B cell lineages. We were able to assess the distribution and colonization of labeled B. fragilis along the intestine, as well as niche competition after coadministration of multiple species of the microbiota. We also fluorescently labeled nine additional commensals (eight anaerobic and one microaerophilic) from three phyla common in the gut--Bacteroidetes, Firmicutes and Proteobacteria--as well as one aerobic pathogen (Staphylococcus aureus). This strategy permits visualization of the anaerobic microbial niche by various methods, including intravital two-photon microscopy and non-invasive whole-body imaging, and can be used to study microbial colonization and host-microbe interactions in real time.
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Affiliation(s)
- Naama Geva-Zatorsky
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - David Alvarez
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Jason E Hudak
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Nicola C Reading
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Deniz Erturk-Hasdemir
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Suryasarathi Dasgupta
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Ulrich H von Andrian
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA.,The Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts, USA
| | - Dennis L Kasper
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
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39
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Belardi B, Bertozzi CR. Chemical Lectinology: Tools for Probing the Ligands and Dynamics of Mammalian Lectins In Vivo. ACTA ACUST UNITED AC 2015; 22:983-93. [PMID: 26256477 DOI: 10.1016/j.chembiol.2015.07.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/29/2015] [Accepted: 07/08/2015] [Indexed: 02/06/2023]
Abstract
The importance and complexity associated with the totality of glycan structures, i.e. the glycome, has garnered significant attention from chemists and biologists alike. However, what is lacking from this biochemical picture is how cells, tissues, and organisms interpret glycan patterns and translate this information into appropriate responses. Lectins, glycan-binding proteins, are thought to bridge this gap by decoding the glycome and dictating cell fate based on the underlying chemical identities and properties of the glycome. Yet, our understanding of the in vivo ligands and function for most lectins is still incomplete. This review focuses on recent advances in chemical tools to study the specificity and dynamics of mammalian lectins in live cells. A picture emerges of lectin function that is highly sensitive to its organization, which in turn drastically shapes immunity and cancer progression. We hope this review will inspire biologists to make use of these new techniques and stimulate chemists to continue developing innovative approaches to probe lectin biology in vivo.
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Affiliation(s)
- Brian Belardi
- Departments of Chemistry and Molecular and Cell Biology and Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, USA
| | - Carolyn R Bertozzi
- Department of Chemistry and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305-4401, USA.
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40
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Agarwal P, Beahm BJ, Shieh P, Bertozzi CR. Systemic Fluorescence Imaging of Zebrafish Glycans with Bioorthogonal Chemistry. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504249] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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41
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Shieh P, Dien VT, Beahm BJ, Castellano JM, Wyss-Coray T, Bertozzi CR. CalFluors: A Universal Motif for Fluorogenic Azide Probes across the Visible Spectrum. J Am Chem Soc 2015; 137:7145-51. [PMID: 25902190 PMCID: PMC4487548 DOI: 10.1021/jacs.5b02383] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fluorescent bioorthogonal smart probes across the visible spectrum will enable sensitive visualization of metabolically labeled molecules in biological systems. Here we present a unified design, based on the principle of photoinduced electron transfer, to access a panel of highly fluorogenic azide probes that are activated by conversion to the corresponding triazoles via click chemistry. Termed the CalFluors, these probes possess emission maxima that range from green to far red wavelengths, and enable sensitive biomolecule detection under no-wash conditions. We used the CalFluor probes to image various alkyne-labeled biomolecules (glycans, DNA, RNA, and proteins) in cells, developing zebrafish, and mouse brain tissue slices.
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Affiliation(s)
- Peyton Shieh
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Vivian T. Dien
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Brendan J. Beahm
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Joseph M. Castellano
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Tony Wyss-Coray
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Carolyn R. Bertozzi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
- Howard Hughes Medical Institute, University of California, Berkeley, California 94720, United States
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42
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Tissue-based metabolic labeling of polysialic acids in living primary hippocampal neurons. Proc Natl Acad Sci U S A 2015; 112:E241-8. [PMID: 25564666 DOI: 10.1073/pnas.1419683112] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The posttranslational modification of neural cell-adhesion molecule (NCAM) with polysialic acid (PSA) and the spatiotemporal distribution of PSA-NCAM play an important role in the neuronal development. In this work, we developed a tissue-based strategy for metabolically incorporating an unnatural monosaccharide, peracetylated N-azidoacetyl-D-mannosamine, in the sialic acid biochemical pathway to present N-azidoacetyl sialic acid to PSA-NCAM. Although significant neurotoxicity was observed in the conventional metabolic labeling that used the dissociated neuron cells, neurotoxicity disappeared in this modified strategy, allowing for investigation of the temporal and spatial distributions of PSA in the primary hippocampal neurons. PSA-NCAM was synthesized and recycled continuously during neuronal development, and the two-color labeling showed that newly synthesized PSA-NCAMs were transported and inserted mainly to the growing neurites and not significantly to the cell body. This report suggests a reliable and cytocompatible method for in vitro analysis of glycans complementary to the conventional cell-based metabolic labeling for chemical glycobiology.
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43
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Biocompatible click chemistry enabled compartment-specific pH measurement inside E. coli. Nat Commun 2014; 5:4981. [PMID: 25236616 PMCID: PMC4174402 DOI: 10.1038/ncomms5981] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 08/13/2014] [Indexed: 11/15/2022] Open
Abstract
Bioorthogonal reactions, especially the Cu(I)-catalyzed azide-alkyne cycloaddition, have revolutionized our ability to label and manipulate biomolecules under living conditions. The cytotoxicity of Cu(I) ions, however, has hindered the application of this reaction in the internal space of living cells. By systematically surveying a panel of Cu(I)-stabilizing ligands in promoting protein labeling within the cytoplasm of E. coli, here we identify a highly efficient and biocompatible catalyst for intracellular modification of proteins by azide-alkyne cycloaddition. This reaction permits us to conjugate an environment-sensitive fluorophore site-specifically onto HdeA, an acid-stress chaperone that adopts pH-dependent conformational changes, in both the periplasm and cytoplasm of E. coli. The resulting protein-fluorophore hybrid pH indicators enable compartment-specific pH measurement to determine the pH gradient across the E. coli cytoplasmic membrane. This construct also allows the measurement of E. coli transmembrane potential, and the determination of the proton motive force across its inner membrane under normal and acid-stress conditions.
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44
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Feng L, Jiang H, Wu P, Marlow FL. Negative feedback regulation of Wnt signaling via N-linked fucosylation in zebrafish. Dev Biol 2014; 395:268-86. [PMID: 25238963 DOI: 10.1016/j.ydbio.2014.09.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 07/25/2014] [Accepted: 09/09/2014] [Indexed: 01/05/2023]
Abstract
L-fucose, a monosaccharide widely distributed in eukaryotes and certain bacteria, is a determinant of many functional glycans that play central roles in numerous biological processes. The molecular mechanism, however, by which fucosylation mediates these processes remains largely elusive. To study how changes in fucosylation impact embryonic development, we up-regulated N-linked fucosylation via over-expression of a key GDP-Fucose transporter, Slc35c1, in zebrafish. We show that Slc35c1 overexpression causes elevated N-linked fucosylation and disrupts embryonic patterning in a transporter activity dependent manner. We demonstrate that patterning defects associated with enhanced N-linked fucosylation are due to diminished canonical Wnt signaling. Chimeric analyses demonstrate that elevated Slc35c1 expression in receiving cells decreases the signaling range of Wnt8a during zebrafish embryogenesis. Moreover, we provide biochemical evidence that this decrease is associated with reduced Wnt8 ligand and elevated Lrp6 coreceptor, which we show are both substrates for N-linked fucosylation in zebrafish embryos. Strikingly, slc35c1 expression is regulated by canonical Wnt signaling. These results suggest that Wnt limits its own signaling activity in part via up-regulation of a transporter, slc35c1 that promotes terminal fucosylation and thereby limits Wnt activity.
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Affiliation(s)
- Lei Feng
- Department of Biochemistry, Albert Einstein College of Medicine Yeshiva University, Bronx, NY 10461, USA
| | - Hao Jiang
- Department of Biochemistry, Albert Einstein College of Medicine Yeshiva University, Bronx, NY 10461, USA
| | - Peng Wu
- Department of Biochemistry, Albert Einstein College of Medicine Yeshiva University, Bronx, NY 10461, USA.
| | - Florence L Marlow
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine Yeshiva University, 1300 Morris Park Avenue, Bronx, NY 10461, USA; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine Yeshiva University, Bronx, NY 10461, USA
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45
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Xu L, Zolotarskaya OY, Yeudall WA, Yang H. Click hybridization of immune cells and polyamidoamine dendrimers. Adv Healthc Mater 2014; 3:1430-8. [PMID: 24574321 DOI: 10.1002/adhm.201300515] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/25/2014] [Indexed: 11/06/2022]
Abstract
Immobilizing highly branched polyamidoamine (PAMAM) dendrimers to the cell surface represents an innovative method of enhancing cell surface loading capacity to deliver therapeutic and imaging agents. In this work, hybridized immune cells, that is, macrophage RAW264.7 (RAW), with PAMAM dendrimer G4.0 (DEN) on the basis of bioorthogonal chemistry are clicked. Efficient and selective cell surface immobilization of dendrimers is confirmed by confocal microscopy. Viability and motility of RAW-DEN hybrids remain the same as untreated RAW cells according to WST-1 assay and wound closure assay. Furthermore, Western blot analysis reveals that there are no significant alterations in the expression levels of signaling molecules AKT, p38, and NFκB (p65) and their corresponding activated (phosphorylated) forms in RAW cells treated with azido sugar and dendrimer, indicating that the hybridization process neither induced cell stress response nor altered normal signaling pathways. Taken together, this work shows the feasibility of applying bioorthogonal chemistry to create cell-nanoparticle hybrids and demonstrates the noninvasiveness of this cell surface engineering approach.
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Affiliation(s)
- Leyuan Xu
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
| | - Olga Yu. Zolotarskaya
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
| | - W. Andrew Yeudall
- Philips Institute of Oral and Craniofacial Molecular Biology; Virginia Commonwealth University; Richmond VA 23298 USA
- Massey Cancer Center; Virginia Commonwealth University; Richmond VA 23298 USA
| | - Hu Yang
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
- Massey Cancer Center; Virginia Commonwealth University; Richmond VA 23298 USA
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46
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Ciepla P, Konitsiotis AD, Serwa RA, Masumoto N, Leong WP, Dallman MJ, Magee AI, Tate EW. New chemical probes targeting cholesterylation of Sonic Hedgehog in human cells and zebrafish. Chem Sci 2014; 5:4249-4259. [PMID: 25574372 PMCID: PMC4285107 DOI: 10.1039/c4sc01600a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 07/25/2014] [Indexed: 12/17/2022] Open
Abstract
Alkynyl-cholesterol probes tag and track Hedgehog protein, illuminating the role of protein cholesterylation in secretion, transport complex formation and signalling, and enabling quantitative proteomic analysis, imaging, and detection of cholesterylation in developing zebrafish.
Sonic Hedgehog protein (Shh) is a morphogen molecule important in embryonic development and in the progression of many cancer types in which it is aberrantly overexpressed. Fully mature Shh requires attachment of cholesterol and palmitic acid to its C- and N-termini, respectively. The study of lipidated Shh has been challenging due to the limited array of tools available, and the roles of these posttranslational modifications are poorly understood. Herein, we describe the development and validation of optimised alkynyl sterol probes that efficiently tag Shh cholesterylation and enable its visualisation and analysis through bioorthogonal ligation to reporters. An optimised probe was shown to be an excellent cholesterol biomimetic in the context of Shh, enabling appropriate release of tagged Shh from signalling cells, formation of multimeric transport complexes and signalling. We have used this probe to determine the size of transport complexes of lipidated Shh in culture medium and expression levels of endogenous lipidated Shh in pancreatic ductal adenocarcinoma cell lines through quantitative chemical proteomics, as well as direct visualisation of the probe by fluorescence microscopy and detection of cholesterylated Hedgehog protein in developing zebrafish embryos. These sterol probes provide a set of novel and well-validated tools that can be used to investigate the role of lipidation on activity of Shh, and potentially other members of the Hedgehog protein family.
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Affiliation(s)
- Paulina Ciepla
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK . ; Institute of Chemical Biology , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Antonios D Konitsiotis
- National Heart and Lung Institute , Imperial College London , Exhibition Road , London SW7 2AZ , UK
| | - Remigiusz A Serwa
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Naoko Masumoto
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK . ; Institute of Chemical Biology , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Wai P Leong
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
| | - Margaret J Dallman
- Institute of Chemical Biology , Imperial College London , Exhibition Road , London SW7 2AZ , UK . ; Department of Life Sciences , Imperial College London , Exhibition Road , London SW7 2AZ , UK
| | - Anthony I Magee
- Institute of Chemical Biology , Imperial College London , Exhibition Road , London SW7 2AZ , UK . ; National Heart and Lung Institute , Imperial College London , Exhibition Road , London SW7 2AZ , UK
| | - Edward W Tate
- Department of Chemistry , Imperial College London , Exhibition Road , London SW7 2AZ , UK . ; Institute of Chemical Biology , Imperial College London , Exhibition Road , London SW7 2AZ , UK .
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47
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Tra VN, Dube DH. Glycans in pathogenic bacteria--potential for targeted covalent therapeutics and imaging agents. Chem Commun (Camb) 2014; 50:4659-73. [PMID: 24647371 PMCID: PMC4049282 DOI: 10.1039/c4cc00660g] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A substantial obstacle to the existing treatment of bacterial diseases is the lack of specific probes that can be used to diagnose and treat pathogenic bacteria in a selective manner while leaving the microbiome largely intact. To tackle this problem, there is an urgent need to develop pathogen-specific therapeutics and diagnostics. Here, we describe recent evidence that indicates distinctive glycans found exclusively on pathogenic bacteria could form the basis of targeted therapeutic and diagnostic strategies. In particular, we highlight the use of metabolic oligosaccharide engineering to covalently deliver therapeutics and imaging agents to bacterial glycans.
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Affiliation(s)
- Van N Tra
- Bowdoin College, Department of Chemistry & Biochemistry, Brunswick, Maine, USA.
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48
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Sletten EM, de Almeida G, Bertozzi CR. A homologation approach to the synthesis of difluorinated cycloalkynes. Org Lett 2014; 16:1634-7. [PMID: 24588780 PMCID: PMC3993865 DOI: 10.1021/ol500260d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Difluorinated cyclooctynes are important
reagents for labeling
azido-biomolecules through copper-free click chemistry. Here, a safe,
scalable synthesis of a difluorinated cyclooctyne is reported, which
involves a key homologation/ring-expansion reaction. Sequential ring
expansions were also employed to synthesize and study a novel difluorinated
cyclononyne.
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Affiliation(s)
- Ellen M Sletten
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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49
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Beahm BJ, Dehnert KW, Derr NL, Kuhn J, Eberhart JK, Spillmann D, Amacher SL, Bertozzi CR. A Visualizable Chain-Terminating Inhibitor of Glycosaminoglycan Biosynthesis in Developing Zebrafish. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310569] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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50
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Beahm BJ, Dehnert KW, Derr NL, Kuhn J, Eberhart JK, Spillmann D, Amacher SL, Bertozzi CR. A visualizable chain-terminating inhibitor of glycosaminoglycan biosynthesis in developing zebrafish. Angew Chem Int Ed Engl 2014; 53:3347-52. [PMID: 24554559 DOI: 10.1002/anie.201310569] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Indexed: 01/01/2023]
Abstract
Heparan sulfate (HS) and chondroitin sulfate (CS) glycosaminoglycans (GAG) are proteoglycan-associated polysaccharides with essential functions in animals. They have been studied extensively by genetic manipulation of biosynthetic enzymes, but chemical tools for probing GAG function are limited. HS and CS possess a conserved xylose residue that links the polysaccharide chain to a protein backbone. Here we report that, in zebrafish embryos, the peptide-proximal xylose residue can be metabolically replaced with a chain-terminating 4-azido-4-deoxyxylose (4-XylAz) residue by administration of UDP-4-azido-4-deoxyxylose (UDP-4-XylAz). UDP-4-XylAz disrupted both HS and CS biosynthesis and caused developmental abnormalities reminiscent of GAG biosynthesis and laminin mutants. The azide substituent of protein-bound 4-XylAz allowed for rapid visualization of the organismal sites of chain termination in vivo through bioorthogonal reaction with fluorescent cyclooctyne probes. UDP-4-XylAz therefore complements genetic tools for studies of GAG function in zebrafish embryogenesis.
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Affiliation(s)
- Brendan J Beahm
- Department of Chemistry and Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley, CA 94720 (USA)
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