51
|
Li J, Xu J, Li L, Ianni A, Kumari P, Liu S, Sun P, Braun T, Tan X, Xiang R, Yue S. MGAT3-mediated glycosylation of tetraspanin CD82 at asparagine 157 suppresses ovarian cancer metastasis by inhibiting the integrin signaling pathway. Am J Cancer Res 2020; 10:6467-6482. [PMID: 32483464 PMCID: PMC7255015 DOI: 10.7150/thno.43865] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Abstract
Background: Tetraspanins constitute a family of transmembrane spanning proteins that function mainly by organizing the plasma membrane into micro-domains. CD82, a member of tetraspanins, is a potent inhibitor of cancer metastasis in numerous malignancies. CD82 is a highly glycosylated protein, however, it is still unknown whether and how this post-translational modification affects CD82 function and cancer metastasis. Methods: The glycosylation of CD82 profiles are checked in the paired human ovarian primary and metastatic cancer tissues. The functional studies on the various glycosylation sites of CD82 are performed in vitro and in vivo. Results: We demonstrate that CD82 glycosylation at Asn157 is necessary for CD82-mediated inhibition of ovarian cancer cells migration and metastasis in vitro and in vivo. Mechanistically, we discover that CD82 glycosylation is pivotal to disrupt integrin α5β1-mediated cellular adhesion to the abundant extracellular matrix protein fibronectin. Thereby the glycosylated CD82 inhibits the integrin signaling pathway responsible for the induction of the cytoskeleton rearrangements required for cellular migration. Furthermore, we reveal that the glycosyltransferase MGAT3 is responsible for CD82 glycosylation in ovarian cancer cells. Metastatic ovarian cancers express reduced levels of MGAT3 which in turn may result in impaired CD82 glycosylation. Conclusions: Our work implicates a pathway for ovarian cancers metastasis regulation via MGAT3 mediated glycosylation of tetraspanin CD82 at asparagine 157.
Collapse
|
52
|
Taujale R, Venkat A, Huang LC, Zhou Z, Yeung W, Rasheed KM, Li S, Edison AS, Moremen KW, Kannan N. Deep evolutionary analysis reveals the design principles of fold A glycosyltransferases. eLife 2020; 9:54532. [PMID: 32234211 PMCID: PMC7185993 DOI: 10.7554/elife.54532] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/31/2020] [Indexed: 12/26/2022] Open
Abstract
Glycosyltransferases (GTs) are prevalent across the tree of life and regulate nearly all aspects of cellular functions. The evolutionary basis for their complex and diverse modes of catalytic functions remain enigmatic. Here, based on deep mining of over half million GT-A fold sequences, we define a minimal core component shared among functionally diverse enzymes. We find that variations in the common core and emergence of hypervariable loops extending from the core contributed to GT-A diversity. We provide a phylogenetic framework relating diverse GT-A fold families for the first time and show that inverting and retaining mechanisms emerged multiple times independently during evolution. Using evolutionary information encoded in primary sequences, we trained a machine learning classifier to predict donor specificity with nearly 90% accuracy and deployed it for the annotation of understudied GTs. Our studies provide an evolutionary framework for investigating complex relationships connecting GT-A fold sequence, structure, function and regulation. Carbohydrates are one of the major groups of large biological molecules that regulate nearly all aspects of life. Yet, unlike DNA or proteins, carbohydrates are made without a template to follow. Instead, these molecules are built from a set of sugar-based building blocks by the intricate activities of a large and diverse family of enzymes known as glycosyltransferases. An incomplete understanding of how glycosyltransferases recognize and build diverse carbohydrates presents a major bottleneck in developing therapeutic strategies for diseases associated with abnormalities in these enzymes. It also limits efforts to engineer these enzymes for biotechnology applications and biofuel production. Taujale et al. have now used evolutionary approaches to map the evolution of a major subset of glycosyltransferases from species across the tree of life to understand how these enzymes evolved such precise mechanisms to build diverse carbohydrates. First, a minimal structural unit was defined based on being shared among a group of over half a million unique glycosyltransferase enzymes with different activities. Further analysis then showed that the diverse activities of these enzymes evolved through the accumulation of mutations within this structural unit, as well as in much more variable regions in the enzyme that extend from the minimal unit. Taujale et al. then built an extended family tree for this collection of glycosyltransferases and details of the evolutionary relationships between the enzymes helped them to create a machine learning framework that could predict which sugar-containing molecules were the raw materials for a given glycosyltransferase. This framework could make predictions with nearly 90% accuracy based only on information that can be deciphered from the gene for that enzyme. These findings will provide scientists with new hypotheses for investigating the complex relationships connecting the genetic information about glycosyltransferases with their structures and activities. Further refinement of the machine learning framework may eventually enable the design of enzymes with properties that are desirable for applications in biotechnology.
Collapse
Affiliation(s)
- Rahil Taujale
- Institute of Bioinformatics, University of Georgia, Athens, Georgia.,Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia
| | - Aarya Venkat
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia
| | - Liang-Chin Huang
- Institute of Bioinformatics, University of Georgia, Athens, Georgia
| | - Zhongliang Zhou
- Department of Computer Science, University of Georgia, Athens, Georgia
| | - Wayland Yeung
- Institute of Bioinformatics, University of Georgia, Athens, Georgia
| | - Khaled M Rasheed
- Department of Computer Science, University of Georgia, Athens, Georgia
| | - Sheng Li
- Department of Computer Science, University of Georgia, Athens, Georgia
| | - Arthur S Edison
- Institute of Bioinformatics, University of Georgia, Athens, Georgia.,Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia.,Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia
| | - Kelley W Moremen
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia.,Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia
| | - Natarajan Kannan
- Institute of Bioinformatics, University of Georgia, Athens, Georgia.,Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia
| |
Collapse
|
53
|
Bashir A, Binderup T, Vestergaard MB, Broholm H, Marner L, Ziebell M, Fugleholm K, Kjær A, Law I. In vivo imaging of cell proliferation in meningioma using 3'-deoxy-3'-[ 18F]fluorothymidine PET/MRI. Eur J Nucl Med Mol Imaging 2020; 47:1496-1509. [PMID: 32047966 DOI: 10.1007/s00259-020-04704-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 01/21/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE Positron emission tomography (PET) with 3'-deoxy-3'-[18F]fluorothymidine ([18F]FLT) provides a noninvasive assessment of tumour proliferation in vivo and could be a valuable imaging modality for assessing malignancy in meningiomas. We investigated a range of static and dynamic [18F]FLT metrics by correlating the findings with cellular biomarkers of proliferation and angiogenesis. METHODS Seventeen prospectively recruited adult patients with intracranial meningiomas underwent a 60-min dynamic [18F]FLT PET following surgery. Maximum and mean standardized uptake values (SUVmax, SUVmean) with and without normalization to healthy brain tissue and blood radioactivity obtained from 40 to 60 min summed dynamic images (PET40-60) and ~ 60-min blood samples were calculated. Kinetic modelling using a two-tissue reversible compartmental model with a fractioned blood volume (VB) was performed to determine the total distribution volume (VT). Expressions of proliferation and angiogenesis with key parameters including Ki-67 index, phosphohistone-H3 (phh3), MKI67, thymidine kinase 1 (TK1), proliferating cell nuclear antigen (PCNA), Kirsten RAt Sarcoma viral oncogene homolog (KRAS), TIMP metallopeptidase inhibitor 3 (TIMP3), and vascular endothelial growth factor A (VEGFA) were determined by immunohistochemistry and/or quantitative polymerase chain reaction. RESULTS Immunohistochemistry revealed 13 World Health Organization (WHO) grade I and four WHO grade II meningiomas. SUVmax and SUVmean normalized to blood radioactivity from PET40-60 and blood sampling, and VT were able to significantly differentiate between WHO grades with the best results for maximum and mean tumour-to-whole-blood ratios (sensitivity 100%, specificity 94-95%, accuracy 99%; P = 0.003). Static [18F]FLT metrics were significantly correlated with proliferative biomarkers, especially Ki-67 index, phh3, and TK1, while no correlations were found with VEGFA or VB. Using Ki-67 index with a threshold > 4%, the majority of [18F]FLT metrics showed a high ability to identify aggressive meningiomas with SUVmean demonstrating the best performance (sensitivity 80%, specificity 81%, accuracy 80%; P = 0.024). CONCLUSION [18F]FLT PET could be a useful imaging modality for assessing cellular proliferation in meningiomas.
Collapse
Affiliation(s)
- Asma Bashir
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark.
| | - Tina Binderup
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark.,Cluster for Molecular Imaging, University of Copenhagen, Copenhagen, Denmark
| | - Mark Bitsch Vestergaard
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark
| | - Helle Broholm
- Department of Pathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Lisbeth Marner
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark.,Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Morten Ziebell
- Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Kåre Fugleholm
- Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Andreas Kjær
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark.,Cluster for Molecular Imaging, University of Copenhagen, Copenhagen, Denmark
| | - Ian Law
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark
| |
Collapse
|
54
|
Elek Z, Kovács Z, Keszler G, Szabó M, Csanky E, Luo J, Guttman A, Rónai Z. High Throughput Multiplex SNP-analysis in Chronic Obstructive Pulmonary Disease and Lung Cancer. Curr Mol Med 2020; 20:185-193. [DOI: 10.2174/1566524019666191017123446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/11/2019] [Accepted: 10/11/2019] [Indexed: 01/01/2023]
Abstract
Background:
A number of human inflammatory diseases and tumors have
been shown to cause alterations in the glycosylation pattern of plasma proteins in a specific
manner. These highly variable and versatile post-translational modifications finetune
protein functions by influencing sorting, folding, enzyme activity and subcellular
localization. However, relatively little is known about regulatory factors of this procedure
and about the accurate causative connection between glycosylation and disease.
Objective:
The aim of the present study was to investigate whether certain single nucleotide
polymorphisms (SNPs) in genes encoding glycosyltransferases and glycosidases
could be associated with elevated risk for chronic obstructive pulmonary disease
(COPD) and lung adenocarcinoma.
Methods:
A total of 32 SNPs localized in genes related to N-glycosylation were selected
for the association analysis. Polymorphisms with putative biological functions (missense
or regulatory variants) were recruited. SNPs were genotyped by a TaqMan OpenArray
platform. A single base extension-based method in combination with capillary gel electrophoresis
was used for verification.
Results:
The TaqMan OpenArray approach provided accurate and reliable genotype
data (global call rate: 94.9%, accuracy: 99.6%). No significant discrepancy was detected
between the obtained and expected genotype frequency values (Hardy–Weinberg equilibrium)
in the healthy control sample group in case of any SNP confirming reliable sampling
and genotyping. Allele frequencies of the rs3944508 polymorphism localized in the
3’ UTR of the MGAT5 gene significantly differed between the sample groups compared.
Conclusion:
Our results suggest that the rs34944508 SNP might modulate the risk for
lung cancer by influencing the expression of MGAT5. This enzyme catalyzes the addition
of N-acetylglucosamine (GlcNAc) in beta 1-6 linkage to the alpha-linked mannose of
biantennary N-linked oligosaccharides, thus, increasing branching that is the characteristic
of invasive malignancies.
Collapse
Affiliation(s)
- Zsuzsanna Elek
- Department of Medical Chemistry, Molecular Biology and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| | - Zsuzsanna Kovács
- Horvath Csaba Memorial Laboratory of Bioseparation Sciences, Research Center for Molecular Medicine, Doctoral School of Molecular Medicine, Faculty of Medicine, University of Debrecen, 98 Nagyerdei krt., Debrecen, 4032, Hungary
| | - Gergely Keszler
- Department of Medical Chemistry, Molecular Biology and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| | | | | | - Jane Luo
- SCIEX Separations, Brea, CA 92821, United States
| | | | - Zsolt Rónai
- Department of Medical Chemistry, Molecular Biology and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| |
Collapse
|
55
|
Nagae M, Yamaguchi Y, Taniguchi N, Kizuka Y. 3D Structure and Function of Glycosyltransferases Involved in N-glycan Maturation. Int J Mol Sci 2020; 21:E437. [PMID: 31936666 PMCID: PMC7014118 DOI: 10.3390/ijms21020437] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 12/21/2022] Open
Abstract
Glycosylation is the most ubiquitous post-translational modification in eukaryotes. N-glycan is attached to nascent glycoproteins and is processed and matured by various glycosidases and glycosyltransferases during protein transport. Genetic and biochemical studies have demonstrated that alternations of the N-glycan structure play crucial roles in various physiological and pathological events including progression of cancer, diabetes, and Alzheimer's disease. In particular, the formation of N-glycan branches regulates the functions of target glycoprotein, which are catalyzed by specific N-acetylglucosaminyltransferases (GnTs) such as GnT-III, GnT-IVs, GnT-V, and GnT-IX, and a fucosyltransferase, FUT8s. Although the 3D structures of all enzymes have not been solved to date, recent progress in structural analysis of these glycosyltransferases has provided insights into substrate recognition and catalytic reaction mechanisms. In this review, we discuss the biological significance and structure-function relationships of these enzymes.
Collapse
Affiliation(s)
- Masamichi Nagae
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshiki Yamaguchi
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Miyagi 981-8558, Japan;
| | - Naoyuki Taniguchi
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka 541-8567, Japan;
| | - Yasuhiko Kizuka
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| |
Collapse
|
56
|
Rahmani S, Defferrari MS, Wakarchuk WW, Antonescu CN. Energetic adaptations: Metabolic control of endocytic membrane traffic. Traffic 2019; 20:912-931. [DOI: 10.1111/tra.12705] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 09/11/2019] [Accepted: 10/13/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Sadia Rahmani
- Department of Chemistry and BiologyRyerson University Toronto Ontario Canada
| | | | - Warren W. Wakarchuk
- Department of Chemistry and BiologyRyerson University Toronto Ontario Canada
- Department of Biological SciencesUniversity of Alberta Edmonton Alberta Canada
| | - Costin N. Antonescu
- Department of Chemistry and BiologyRyerson University Toronto Ontario Canada
- Keenan Research Centre for Biomedical Science of St. Michael's Hospital Toronto Ontario Canada
| |
Collapse
|
57
|
Reduzzi C, Vismara M, Gerratana L, Silvestri M, De Braud F, Raspagliesi F, Verzoni E, Di Cosimo S, Locati LD, Cristofanilli M, Daidone MG, Cappelletti V. The curious phenomenon of dual-positive circulating cells: Longtime overlooked tumor cells. Semin Cancer Biol 2019; 60:344-350. [PMID: 31626958 DOI: 10.1016/j.semcancer.2019.10.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/05/2019] [Accepted: 10/09/2019] [Indexed: 01/29/2023]
Abstract
The presence in the blood of patients with solid tumors of circulating cells expressing both epithelial and leukocyte markers (dual-positive cells, DPcells), has often been reported, though it has never been investigated in detail. A recent study suggested that DPcells are hybrid cells derived from the fusion of tumor cells with macrophages. Such fusion hybrids acquire macrophage-associated features endowing them with accelerated growth, increased motility, enhanced invasion activity and thus, a higher efficiency in metastasis formation. However, no direct evidence proving the tumor origin of circulating DPcells was provided in patients. Here we contribute a review of literature data on DPcells and on the hybrid theory with the aim of putting the current evidence both in a biological and clinical perspective and to generate new hypotheses on the mechanisms underlying tumor progression. To add further biological and clinical context to our literature review, we also report some preliminary data from our laboratory on the identification of DPcells in several solid tumors and confirmation of their malignant genotype, thus classifying them as DP-CTCs.
Collapse
Affiliation(s)
- Carolina Reduzzi
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Marta Vismara
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Lorenzo Gerratana
- Department of Medicine (DAME), University of Udine, Italy; Department of Medicine-Hematology and Oncology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Marco Silvestri
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Filippo De Braud
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy; University of Milan, Milan, Italy
| | - Francesco Raspagliesi
- Department of surgery, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Elena Verzoni
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Serena Di Cosimo
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Laura D Locati
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Massimo Cristofanilli
- Department of Medicine-Hematology and Oncology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Maria Grazia Daidone
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Vera Cappelletti
- Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy.
| |
Collapse
|
58
|
Emerging structural insights into glycosyltransferase-mediated synthesis of glycans. Nat Chem Biol 2019; 15:853-864. [PMID: 31427814 DOI: 10.1038/s41589-019-0350-2] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 07/17/2019] [Indexed: 12/27/2022]
Abstract
Glycans linked to proteins and lipids play key roles in biology; thus, accurate replication of cellular glycans is crucial for maintaining function following cell division. The fact that glycans are not copied from genomic templates suggests that fidelity is provided by the catalytic templates of glycosyltransferases that accurately add sugars to specific locations on growing oligosaccharides. To form new glycosidic bonds, glycosyltransferases bind acceptor substrates and orient a specific hydroxyl group, frequently one of many, for attack of the donor sugar anomeric carbon. Several recent crystal structures of glycosyltransferases with bound acceptor substrates reveal that these enzymes have common core structures that function as scaffolds upon which variable loops are inserted to confer substrate specificity and correctly orient the nucleophilic hydroxyl group. The varied approaches for acceptor binding site assembly suggest an ongoing evolution of these loop regions provides templates for assembly of the diverse glycan structures observed in biology.
Collapse
|
59
|
Harada Y, Kizuka Y, Tokoro Y, Kondo K, Yagi H, Kato K, Inoue H, Taniguchi N, Maruyama I. N-glycome inheritance from cells to extracellular vesicles in B16 melanomas. FEBS Lett 2019; 593:942-951. [PMID: 30943309 PMCID: PMC6594130 DOI: 10.1002/1873-3468.13377] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/20/2019] [Accepted: 04/01/2019] [Indexed: 01/09/2023]
Abstract
We investigated the correlation between metastatic behaviors of tumor cells and asparagine‐linked glycosylation (N‐glycosylation) of tumor‐derived extracellular vesicles (EVs). Three mouse melanoma B16 variants with distinct metastatic potentials show similar gene expression levels and enzymatic activities of glycosyltransferases involved in N‐glycosylation. All melanoma variants and EVs have nearly identical profiles of de‐sialylated N‐glycans. The major de‐sialylated N‐glycan structures of cells and EVs are core‐fucosylated, tetra‐antennary N‐glycans with β1,6‐N‐acetylglucosamine branches. A few N‐glycans are extended by N‐acetyllactosamine repeats. Sialylation of these N‐glycans may generate cell‐type‐specific N‐glycomes on EVs. Taken together, melanoma‐derived EVs show high expression of tumor‐associated N‐glycans, and the core structure profile is inherited during multiple selection cycles of B16 melanomas and from tumor cells to EVs.
Collapse
Affiliation(s)
- Yoichiro Harada
- Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Sciences, Japan
| | - Yasuhiko Kizuka
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Japan
| | - Yuko Tokoro
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Japan
| | - Kiyotaka Kondo
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Japan
| | - Hirokazu Yagi
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan
| | - Koichi Kato
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan.,Exploratory Research Center on Life and Living Systems (ExCELLS), Institute for Molecular Science (IMS), National Institutes of Natural Sciences, Okazaki, Japan
| | - Hiromasa Inoue
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Japan
| | - Naoyuki Taniguchi
- Department of Glyco-Oncology, Osaka International Cancer Institute, Japan
| | - Ikuro Maruyama
- Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Sciences, Japan
| |
Collapse
|
60
|
Brown ZP, Takagi J. Advances in domain and subunit localization technology for electron microscopy. Biophys Rev 2019; 11:149-155. [PMID: 30834502 DOI: 10.1007/s12551-019-00513-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 02/20/2019] [Indexed: 12/26/2022] Open
Abstract
The award of the 2017 Nobel Prize in chemistry, 'for developing cryo-electron microscopy for the high-resolution structure determination of biomolecules in solution', was recognition that this method, and electron microscopy more generally, represent powerful techniques in the scientific armamentarium for atomic level structural assessment. Technical advances in equipment, software, and sample preparation, have allowed for high-resolution structural determination of a range of complex biological machinery such that the position of individual atoms within these mega-structures can be determined. However, not all targets are amenable to attaining such high-resolution structures and some may only be resolved at so-called intermediate resolutions. In these cases, other tools are needed to correctly characterize the domain or subunit orientation and architecture. In this review, we will outline various methods that can provide additional information to help understand the macro-level organization of proteins/biomolecular complexes when high-resolution structural description is not available. In particular, we will discuss the recent development and use of a novel protein purification approach, known as the the PA tag/NZ-1 antibody system, which provides numberous beneficial properties, when used in electron microscopy experimentation.
Collapse
Affiliation(s)
- Zuben P Brown
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA.
| | - Junichi Takagi
- Laboratory of Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, Japan
| |
Collapse
|
61
|
Kubyshkin AV, Fomochkina II, Petrosyan AM. THE IMPACT OF ALCOHOL ON PRO-METASTATIC N-GLYCOSYLATION IN PROSTATE CANCER. KRIMSKII ZHURNAL EKSPERIMENTAL'NOI I KLINICHESKOI MEDITSINY = KRYMS'KYI ZHURNAL EKSPERYMENTAL'NOI TA KLINICHNOI MEDYTSYNY = CRIMEAN JOURNAL OF EXPERIMENTAL AND CLINICAL MEDICINE 2018; 8:11-20. [PMID: 31131224 PMCID: PMC6534161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chronic alcohol abuse and alcoholism are considered risk factors for prostate cancer (PCa) progression, but the mechanism is unknown. Previously, we found that: (1) fragmentation of the Golgi complex correlates with the progression of PCa; (2) ethanol (EtOH) induces Golgi disorganization, which, in turn, alters intra-Golgi localization of some Golgi proteins. Also, progression of the prostate tumor is associated with activation of N-acetylglucosaminyltransferase-V (MGAT5)-mediated N-glycosylation of pro-metastatic proteins, including matriptase and integrins, followed by their enhanced retention at the cell surface. Here, using high-resolution microscopy, we found that alcohol effect on Golgi in low passage androgen-responsive LNCaP cells mimic the fragmented Golgi phenotype of androgen-refractory high passage LNCaP and PC-3 cells. Next, we detected that transition to androgen unresponsiveness is accompanied by downregulation of N-acetylglucosaminyltransferase-III (MGAT3), the enzyme that competes with MGAT5 for anti-metastatic N-glycan branching. Moreover, in low passage LNCaP cells, alcohol-induced Golgi fragmentation induced translocation of MGAT3 from the Golgi to the cytoplasm, while intra-Golgi localization of MGAT5 appeared unaffected. Then, the relationship between Golgi morphology, MGAT3 intracellular position, and clinicopathologic features was assessed in human PCa patient specimens with and without a history of alcohol dependence. We revealed that within the same clinical stage, the level of Golgi disorganization and the cytoplasmic shift of MGAT3 was more prominent in patients consuming alcohol. In vitro studies suggest that EtOH-induced downregulation of MGAT3 correlates with activation of MGAT5-mediated glycosylation and overexpression of both matriptase and integrins. In sum, we provide a novel insight into the alcohol-mediated tumor promotion.
Collapse
Affiliation(s)
- A V Kubyshkin
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, Simferopol, Russia; 295051
| | - I I Fomochkina
- Medical Academy named after S.I. Georgievsky, V.I. Vernadsky Crimean Federal University, Lenin Avenue 5/7, Simferopol, Russia; 295051
| | - A M Petrosyan
- University of Nebraska Medical Center, 985870 Nebraska Medical Center, Omaha, NE, USA; 68198-5870
| |
Collapse
|