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Qiu Q, Li C, Song Y, Shi T, Luo X, Zhang H, Hu L, Yan X, Zheng H, Liu M, Liu M, Liu M, Yang S, Liu X, Chen G, Deng Y. Targeted delivery of ibrutinib to tumor-associated macrophages by sialic acid-stearic acid conjugate modified nanocomplexes for cancer immunotherapy. Acta Biomater 2019; 92:184-195. [PMID: 31108259 DOI: 10.1016/j.actbio.2019.05.030] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 05/02/2019] [Accepted: 05/10/2019] [Indexed: 12/12/2022]
Abstract
Ibrutinib (IBR), an irreversible Bruton's tyrosine kinase (BTK) inhibitor, is expected to be a potent therapeutic modality, given that BTK is overexpressed in tumor-associated macrophages (TAMs) and participates in promoting tumor progression, angiogenesis, and immunosuppression. However, rapid clearance in vivo and low tumor accumulation have rendered effective uptake of IBR by TAMs challenge. Herein, we designed and synthesized a sialic acid (SA)-stearic acid conjugate modified on the surface of nanocomplexes to encapsulate IBR (SA/IBR/EPG) for targeted immunotherapy. Amphiphilic egg phosphatidylglycerol (EPG) structure and strong IBR-EPG interactions render these nanocomplexes high IBR loading capacity, prolonged blood circulation, and optimal particle sizes (∼30 nm), which can effectively deliver IBR to the tumor, followed by subsequent internalization of IBR by TAMs through SA-mediated active targeting. In vitro and in vivo tests showed that the prepared SA/IBR/EPG nanocomplexes could preferentially accumulate in TAMs and exert potent antitumor activity. Immunofluorescence staining analysis further confirmed that SA/IBR/EPG remarkably inhibited angiogenesis and tumorigenic cytokines released by TAM and eventually suppressed tumor progression, without eliciting any unwanted effect. Thus, SA-decorated IBR nanocomplexes present a promising strategy for cancer immunotherapy. STATEMENT OF SIGNIFICANCE: Ibrutinib (IBR), an irreversible Bruton's tyrosine kinase (BTK) inhibitor, is expected to be a potent therapeutic modality, given that BTK is overexpressed in tumor-associated macrophages (TAMs) and participates in promoting tumor progression, angiogenesis, and immunosuppression. However, rapid clearance in vivo and low tumor accumulation have rendered effective uptake of IBR by TAMs challenge. Herein, we designed and synthesized a sialic acid (SA)-stearic acid conjugate modified on the surface of nanocomplexes to encapsulate IBR (SA/IBR/EPG) for targeted delivery of IBR to TAMs. The developed SA/IBR/EPG nanocomplexes exhibited high efficiency in targeting TAMs and inhibiting BTK activation, consequently inhibiting Th2 tumorigenic cytokine release, reducing angiogenesis, and suppressing tumor growth. These results implied that the SA/IBR/EPG nanocomplex could be a promising strategy for TAM-targeting immunotherapy with minimal systemic side effects.
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Wang XJ, Shu GF, Xu XL, Peng CH, Lu CY, Cheng XY, Luo XC, Li J, Qi J, Kang XQ, Jin FY, Chen MJ, Ying XY, You J, Du YZ, Ji JS. Combinational protective therapy for spinal cord injury medicated by sialic acid-driven and polyethylene glycol based micelles. Biomaterials 2019; 217:119326. [PMID: 31288173 DOI: 10.1016/j.biomaterials.2019.119326] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/27/2019] [Accepted: 06/29/2019] [Indexed: 12/27/2022]
Abstract
Spinal cord injury (SCI) leads to immediate disruption of neuronal membranes and loss of neurons, followed by extensive secondary injury process. Treatment of SCI still remains a tremendous challenge clinically. Minocycline could target comprehensive secondary injury via anti-inflammatory, anti-oxidant and anti-apoptotic mechanisms. Polyethylene glycol (PEG), a known sealing agent, is able to seal the damaged cell membranes and reduce calcium influx, thereby exerting neuroprotective capacity. Here, an E-selectin-targeting sialic acid - polyethylene glycol - poly (lactic-co-glycolic acid) (SAPP) copolymer was designed for delivering hydrophobic minocycline to achieve combinational therapy of SCI. The obtained SAPP copolymer could self-assemble into micelles with critical micelle concentration being of 13.40 μg/mL, and effectively encapsulate hydrophobic minocycline. The prepared drug-loaded micelles (SAPPM) displayed sustained drug release over 72 h, which could stop microglia activation and exhibited excellent neuroprotective capacity in vitro. The SAPP micelles were efficiently accumulated in the lesion site of SCI rats via the specific binding between sialic acid and E-selectin. Due to the targeting distribution and combinational effect between PEG and minocycline, SAPPM could obviously reduce the area of lesion cavity, and realize more survival of axons and myelin sheaths from the injury, thus distinctly improving hindlimb functional recovery of SCI rats and conferring superior therapeutic effect in coparison with other groups. Our work presented an effective and safe strategy for SCI targeting therapy. Besides, neuroprotective capacity of PEG deserves further investigation on other central nervous system diseases.
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Affiliation(s)
- Xiao-Juan Wang
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China; Department of Pharmacy, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, PR China
| | - Gao-Feng Shu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China; Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Xiao-Ling Xu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Chen-Han Peng
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Chen-Ying Lu
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Xing-Yao Cheng
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Xiang-Chao Luo
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Jie Li
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Jing Qi
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Xu-Qi Kang
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Fei-Yang Jin
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Min-Jiang Chen
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China
| | - Xiao-Ying Ying
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Jian You
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Yong-Zhong Du
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China.
| | - Jian-Song Ji
- Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research, Lishui Hospital of Zhejiang University, Lishui, 323000, PR China.
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Mantuano NR, Oliveira-Nunes MC, Alisson-Silva F, Dias WB, Todeschini AR. Emerging role of glycosylation in the polarization of tumor-associated macrophages. Pharmacol Res 2019; 146:104285. [PMID: 31132403 DOI: 10.1016/j.phrs.2019.104285] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 05/02/2019] [Accepted: 05/23/2019] [Indexed: 12/20/2022]
Abstract
Tumors are formed by several cell types interacting in a complex environment of soluble and matrix molecules. The crosstalk between the cells and extracellular components control tumor fate. Macrophages are highly plastic and diverse immune cells that are known to be key regulators of this complex network, which is mostly because they can adjust their metabolism and reprogram their phenotype and effector function. Here, we review the studies that disclose the central role of metabolism and tumor microenvironment in shaping the phenotype and function of macrophages, highlighting the importance of the hexosamine biosynthetic pathway. We further discuss growing evidence of nutrient-sensitive protein modifications such as O-GlcNAcylation and extracellular glycosylation in the function and polarization of tumor-associated macrophages.
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Affiliation(s)
- Natalia Rodrigues Mantuano
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Bloco D sala 03 CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Maria Cecilia Oliveira-Nunes
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Bloco D sala 03 CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Frederico Alisson-Silva
- Departamento de Imunologia, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Bloco D sala 03 CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Wagner Barbosa Dias
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Bloco D sala 03 CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil.
| | - Adriane Regina Todeschini
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Bloco D sala 03 CCS, UFRJ, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil.
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Willems AP, Sun L, Schulz MA, Tian W, Ashikov A, van Scherpenzeel M, Hermans E, Clausen H, Yang Z, Lefeber DJ. Activity of N-acylneuraminate-9-phosphatase (NANP) is not essential for de novo sialic acid biosynthesis. Biochim Biophys Acta Gen Subj 2019; 1863:1471-1479. [PMID: 31121216 DOI: 10.1016/j.bbagen.2019.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/20/2019] [Accepted: 05/17/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Sialylation of glycoproteins and glycolipids is important for biological processes such as cellular communication, cell migration and protein function. Biosynthesis of CMP-sialic acid, the essential substrate, comprises five enzymatic steps, involving ManNAc and sialic acid and their phosphorylated forms as intermediates. Genetic diseases in this pathway result in different and tissue-restricted phenotypes, which is poorly understood. METHODS AND RESULTS We aimed to study the mechanisms of sialic acid metabolism in knockouts (KO) of the sialic acid pathway in two independent cell lines. Sialylation of cell surface glycans was reduced by KO of GNE (UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase), NANS (sialic acid synthase) and CMAS (N-acylneuraminate cytidylyltransferase) genes, but was largely unaffected in NANP (N-acylneuraminate-9-phosphatase) KO, as studied by MAA and PNA lectin binding. NANP is the third enzyme in sialic acid biosynthesis and dephosphorylates sialic acid 9-phosphate to free sialic acid. LC-MS analysis of sialic acid metabolites showed that CMP-sialic acid was dramatically reduced in GNE and NANS KO cells and undetectable in CMAS KO. In agreement with normal cell surface sialylation, CMP-sialic acid levels in NANP KO were comparable to WT cells, even though sialic acid 9-phosphate, the substrate of NANP accumulated. Metabolic flux analysis with 13C6-labelled ManNAc showed a lower, but significant conversion of ManNAc into sialic acid. CONCLUSIONS Our data provide evidence that NANP activity is not essential for de novo sialic acid production and point towards an alternative phosphatase activity, bypassing NANP. GENERAL SIGNIFICANCE This report contributes to a better understanding of sialic acid biosynthesis in humans.
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Affiliation(s)
- Anke P Willems
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands; Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands
| | - Lingbo Sun
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Morten Alder Schulz
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Weihua Tian
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Angel Ashikov
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands
| | - Monique van Scherpenzeel
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands
| | - Esther Hermans
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Zhang Yang
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Dirk J Lefeber
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands; Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525, GA, Nijmegen, the Netherlands.
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Li W, Ghosh T, Bai Y, Santra A, Xiao A, Chen X. A substrate tagging and two-step enzymatic reaction strategy for large-scale synthesis of 2,7-anhydro- sialic acid. Carbohydr Res 2019; 479:41-47. [PMID: 31132641 DOI: 10.1016/j.carres.2019.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/07/2019] [Accepted: 05/15/2019] [Indexed: 10/26/2022]
Abstract
A sialyltransferase acceptor tagging and two-step enzymatic reaction strategy has been developed for multigram-scale chemoenzymatic synthesis of 2,7-anhydro-N-acetylneuraminic acid (2,7-anhydro-Neu5Ac), a compound that can serve as a sole carbon source for the growth of Ruminococcus gnavus, a common human gut commensal. Different approaches of introducing hydrophobic UV-active tags to lactose as well-suited sialyltransferase acceptors have been explored and a simple two-step high-yield chemical synthetic procedure has been identified. The UV-active hydrophobic tag facilitates monitoring reaction progress and allows facile product purification by C18-cartridges. A two-step enzyme-catalyzed reaction procedure has been established to combine with C18 cartridge-based purification process for high-yield production of the desired product in multigram scales with the recycled use of chromophore-tagged lactoside starting material and sialoside intermediate. This study demonstrated an environmentally friendly highly-efficient synthetic and purification strategy for the production of 2,7-anhydro-Neu5Ac to explore its potential functions.
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Affiliation(s)
- Wanqing Li
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Tamashree Ghosh
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Yuanyuan Bai
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Abhishek Santra
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - An Xiao
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Xi Chen
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA.
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Shahvali S, Shahesmaeili A, Sanjari M, Karami-Mohajeri S. The correlation between blood oxidative stress and sialic acid content in diabetic patients with nephropathy, hypertension, and hyperlipidemia. Diabetol Int 2019; 11:19-26. [PMID: 31950000 DOI: 10.1007/s13340-019-00395-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 04/23/2019] [Indexed: 12/23/2022]
Abstract
This clinical study was designed to find out the correlation between oxidative stress and sialic acid (SA) content of plasma and RBCs in patients with type 2 diabetes. We evaluated SA concentration and oxidative stress biomarkers in healthy subjects and diabetic patients with and without complications in a cross-sectional survey. Significant changes in oxidative stress biomarkers and RBC-SA were revealed in the diabetic patients compared to those in the healthy group. Plasma SA significantly increased with an increase in lipid peroxidation of RBCs (LPO-RBC) (P < 0.001) in the diabetic patients without complication. RBC-SA significantly decreased with an elevation in LPO-RBC (P < 0.001) in all the diabetic patients and those with nephropathy. There was no significant correlation between plasma and RBC-SA and other oxidative stress biomarkers in the diabetic subjects. In multiple logistic regression analysis, RBC-SA was independently related to LPO-RBC in all the diabetic patients and those with nephropathy. We conclude that the induction of LPO-RBC in diabetic patients and those with nephropathy may influence the SA decomposition of RBC membrane, thereby altering its functions and transporter activities. Therefore, LPO-RBC and SA levels in RBCs can be used for prediction of diabetic nephropathy, and further studies to evaluate other factors contributing to desialylation of RBC membrane are justified.
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Affiliation(s)
- Sedigheh Shahvali
- 1Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran.,2Pharmaceutics Research Center, Institute of Neuropharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Haft Bagh-e-Alavi Highway, 7616911319 Kerman, Iran
| | - Armita Shahesmaeili
- 3Gastroenterology and Hepatology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Mojgan Sanjari
- 1Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Somayyeh Karami-Mohajeri
- 2Pharmaceutics Research Center, Institute of Neuropharmacology, Faculty of Pharmacy, Kerman University of Medical Sciences, Haft Bagh-e-Alavi Highway, 7616911319 Kerman, Iran
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Brink LR, Gueniot JP, Lönnerdal B. Effects of milk fat globule membrane and its various components on neurologic development in a postnatal growth restriction rat model. J Nutr Biochem 2019; 69:163-171. [PMID: 31096073 DOI: 10.1016/j.jnutbio.2019.03.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 01/02/2023]
Abstract
BACKGROUND Milk fat globule membrane (MFGM) is a component of breast milk that consists of glycosylated membrane-bound proteins, polar lipids and carbohydrates originating from the mammary gland plasma membrane. A commercially available bovine MFGM added to infant formula has been shown to improve cognitive development in infants at 12 months of age. OBJECTIVE Considering that MFGM is a complex mixture, our aim was to determine which component(s) may be leading to these cognitive outcomes. METHODS Growth-restricted rat pups were supplemented with one of five treatments: (a) bovine MFGM, (b) bovine phospholipid concentrate (PL), (c) sialic acid (SIA) at 200 mg/kg body weight (bw) SIA100, (d) SIA at 2 mg/kg bw and (e) nonfat milk as control. Pups were randomized, cross-fostered into litters of 17 pups per dam and supplemented from postnatal day (PD) 2 to PD 21. The following behavioral tests were performed at adulthood: T-Maze Spontaneous Alternation, Novel Object Recognition and Morris Water Maze. Hippocampus was isolated at PD14 and PD21. Expression of four genes were measured including brain-derived neurotrophic factor (BDNF), dopamine receptor 1, (Drd1), glutamate receptor (GluR-1) and ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialytransferase 4 (St8Sia4). Following behavioral testing, brains were collected for nonbiased stereology. RESULTS Increased expression of genes due to supplementation was most pronounced at the PD14 time point. The MFGM group exhibited higher T-Maze scores compared to the SIA group (P=.01), whereas the SIA100 group visited the novel object more frequently than the MFGM group in the Novel Object test (P=.02). No differences due to supplementation were found in the Morris Water Maze or nonbiased stereology, CONCLUSIONS: In this trial, MFGM, compared to its individual components, had the largest impact on neurodevelopment in rat pups through up-regulation of genes and improved T-Maze scores compared to the SIA group.
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Tsoukalas C, Geninatti-Crich S, Gaitanis A, Tsotakos T, Paravatou-Petsotas M, Aime S, Jiménez-Juárez R, Anagnostopoulos CD, Djanashvili K, Bouziotis P. Tumor Targeting via Sialic Acid: [ 68Ga]DOTA-en-pba as a New Tool for Molecular Imaging of Cancer with PET. Mol Imaging Biol 2019; 20:798-807. [PMID: 29464496 DOI: 10.1007/s11307-018-1176-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of this study was to demonstrate the potential of Ga-68-labeled macrocycle (DOTA-en-pba) conjugated with phenylboronic vector for tumor recognition by positron emission tomography (PET), based on targeting of the overexpressed sialic acid (Sia). PROCEDURES The imaging reporter DOTA-en-pba was synthesized and labeled with Ga-68 at high efficiency. Cell binding assay on Mel-C and B16-F10 melanoma cells was used to evaluate melanin production and Sia overexpression to determine the best model for demonstrating the capability of [68Ga]DOTA-en-pba to recognize tumors. The in vivo PET imaging was done with B16-F10 tumor-bearing SCID mice injected with [68Ga]DOTA-en-pba intravenously. Tumor, blood, and urine metabolites were assessed to evaluate the presence of a targeting agent. RESULTS The affinity of [68Ga]DOTA-en-pba to Sia was demonstrated on B16-F10 melanoma cells, after the production of melanin as well as Sia overexpression was proved to be up to four times higher in this cell line compared to that in Mel-C cells. Biodistribution studies in B16-F10 tumor-bearing SCID mice showed blood clearance at the time points studied, while uptake in the tumor peaked at 60 min post-injection (6.36 ± 2.41 % ID/g). The acquired PET images were in accordance with the ex vivo biodistribution results. Metabolite assessment on tumor, blood, and urine samples showed that [68Ga]DOTA-en-pba remains unmetabolized up to at least 60 min post-injection. CONCLUSIONS Our work is the first attempt for in vivo imaging of cancer by targeting overexpression of sialic acid on cancer cells with a radiotracer in PET.
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Affiliation(s)
- Charalambos Tsoukalas
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research "Demokritos", Aghia Paraskevi, 153 10, Athens, Greece
| | - Simonetta Geninatti-Crich
- Department of Molecular Biotechnology and Health Sciences, University of Turin, via Nizza 52, Torino, Italy
| | - Anastasios Gaitanis
- Biomedical Research Foundation of the Academy of Athens, 4 Soranou Ephessiou Street, 115 27, Athens, Greece
| | - Theodoros Tsotakos
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research "Demokritos", Aghia Paraskevi, 153 10, Athens, Greece
| | - Maria Paravatou-Petsotas
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research "Demokritos", Aghia Paraskevi, 153 10, Athens, Greece
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, University of Turin, via Nizza 52, Torino, Italy
| | - Rogelio Jiménez-Juárez
- Department of Organic Chemistry, National School of Biological Sciences, National Polytechnical Institute, Prolongación de Carpio y Plan de Ayala S/N, 11340, Mexico D.F., Mexico.,Department of Biotechnology, Delft University of Technology, Van der Maasweg, 2629 HZ, Delft, Netherlands
| | | | - Kristina Djanashvili
- Department of Biotechnology, Delft University of Technology, Van der Maasweg, 2629 HZ, Delft, Netherlands
| | - Penelope Bouziotis
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research "Demokritos", Aghia Paraskevi, 153 10, Athens, Greece.
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Xu S, Che S, Ma P, Zhang F, Xu L, Liu X, Wang X, Song D, Sun Y. One-step fabrication of boronic-acid-functionalized carbon dots for the detection of sialic acid. Talanta 2019; 197:548-52. [PMID: 30771974 DOI: 10.1016/j.talanta.2019.01.074] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/17/2019] [Accepted: 01/24/2019] [Indexed: 01/29/2023]
Abstract
Typically, sialic acids (SA) with a nine-carbon backbone are found at the glycan chain termini on the cell membranes, which play crucial roles in various physiological and pathological processes. The expression level of SA in the blood serum has been reported to correlate with various disease states among cancer. In this study, a novel approach for preparing fluorescent boronic-acid-modified carbon dots (C-dots) for the detection of SA was developed. The functionalized C-dots were synthesized by a facile, one-step hydrothermal method using 3-pyridineboronic acid as the sole carbon source. The added SA selectively recognized the C-dots, leading to the fluorescence quenching of the C-dots in a linear range of 80-4000 μM with a detection limit of 54 μM. The as-developed boronic-acid nanoprobe was successfully applied for the detection of SA in human serum samples with satisfactory results. In addition, this method afforded results within 4 min. Compared to other methods, this new proposed approach was simpler and exhibited excellent sensitivity and selectivity, demonstrating immense potential as an alternative for SA detection.
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210
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Wei M, Wang PG. Desialylation in physiological and pathological processes: New target for diagnostic and therapeutic development. Prog Mol Biol Transl Sci 2019; 162:25-57. [PMID: 30905454 DOI: 10.1016/bs.pmbts.2018.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Desialylation is a pivotal part of sialic acid metabolism, which initiates the catabolism of glycans by removing the terminal sialic acid residues on glycans, thereby modulating the structure and functions of glycans, glycoproteins, or glycolipids. The functions of sialic acids have been well recognized, whereas the function of desialylation process is underappreciated or largely ignored. However, accumulating evidence demonstrates that desialylation plays an important role in a variety of physiological and pathological processes. This chapter summarizes the current knowledge pertaining to desialylation in a variety of physiological and pathological processes, with a focus on the underlying molecular mechanisms. The potential of targeting desialylation process for diagnostic and therapeutic development is also discussed.
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Affiliation(s)
- Mohui Wei
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
| | - Peng George Wang
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA, United States
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Zheng H, Li J, Wang M, Luo X, Qiu Q, Hu L, Li C, Song Y, Deng Y. Exhausting tumor associated macrophages with sialic acid-polyethyleneimine-cholesterol modified liposomal doxorubicin for enhancing sarcoma chemotherapy. Int J Pharm 2019; 558:187-200. [PMID: 30654062 DOI: 10.1016/j.ijpharm.2019.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/13/2018] [Accepted: 01/01/2019] [Indexed: 02/03/2023]
Abstract
To overstep the dilemma of chemical drug degradation within powerful lysosomes of tumor associated macrophages (TAMs), a sialic acid-polyethylenimine-cholesterol (SA-PEI-CH) modified liposomal doxorubicin (DOX-SPCL) was designed with both TAMs targeting and smart lysosomal trafficking. The modified liposome DOX-SPCL performed particle size as 103.2 ± 3.1 nm and zeta potential as -4.5 ± 0.9 mV with encapsulation efficiency as 95.8 ± 0.5%. In in vitro cell experiments, compared with conventional liposomal doxorubicin (DOX-CL) and PEGylated liposomal doxorubicin (DOX-PL), DOX-SPCL showed a selective binding on TAMs and a mere lysosomal concentration. In pharmacokinetic study, DOX-SPCL effectively impeded/delayed the disposition of mononuclear phagocyte system (MPS) with a value of AUC0-t as 796.03 ± 66.93 mg L-1 h. In S180 sarcomas bearing mice, DOX-SPCL showed the greatest tumor inhibition rate (92.7% ± 3.6%) compared with DOX-CL (46.4% ± 2.0%) or DOX-PL (58.8% ± 7.6%). The <0.5% positive region of TAMs in tumor section indicated a super TAMs exhaustion for DOX-SPCL treatment. Conclusively, DOX-SPCL was supposed as a safe and effective liposomal preparation for clinical sarcoma treatment via TAMs targeting/deletion delivery strategy.
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Affiliation(s)
- Huangliang Zheng
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Jiaqi Li
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Mengjing Wang
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Xiang Luo
- College of Chemistry and Chemical Engineering, Shaoxing University, No. 508 Huancheng West Road, Shaoxing, Zhejiang 312000, China
| | - Qiujun Qiu
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Ling Hu
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Cong Li
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Yanzhi Song
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China.
| | - Yihui Deng
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China.
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212
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Luukkonen J, Hilli M, Nakamura M, Ritamo I, Valmu L, Kauppinen K, Tuukkanen J, Lehenkari P. Osteoclasts secrete osteopontin into resorption lacunae during bone resorption. Histochem Cell Biol 2019; 151:475-487. [PMID: 30637455 PMCID: PMC6542781 DOI: 10.1007/s00418-019-01770-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2019] [Indexed: 01/27/2023]
Abstract
Osteopontin (OPN) is a non-collagenous extracellular sialylated glycoprotein located in bone. It is believed to be one of the key components in osteoclast attachment to bone during resorption. In this study, we characterized OPN and other glycoproteins found in the resorption lacunae to confirm the role of osteoclasts in OPN secretion using electron microscopy and mass spectrometry. Additionally, we examined the glycan epitopes of resorption pits and the effects of different glycan epitopes on the differentiation and function of osteoclasts. Osteoarthritic femoral heads were examined by immunohistochemistry to reveal the presence of OPN in areas of increased bone metabolism in vivo. Our results demonstrate that human osteoclasts secrete OPN into resorption lacunae on native human bone and on carbonated hydroxyapatite devoid of natural OPN. OPN is associated with an elevated bone turnover in osteoarthritic bone under experimental conditions. Our data further confirm that osteoclasts secrete OPN into the resorption pit where it may function as a chemokine for subsequent bone formation. We show that α2,3- and α2,6-linked sialic acids have a role in the process of osteoclast differentiation. OPN is one of the proteins that has both of the above sialic residues, hence we propose that de-sialylation can effect osteoclast differentiation in bone.
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Affiliation(s)
- Jani Luukkonen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland.
| | - Meeri Hilli
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Miho Nakamura
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland.,Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 1010062, Japan
| | - Ilja Ritamo
- Thermo Fisher Scientific Oy, Ratastie 2, 01620, Vantaa, Finland
| | - Leena Valmu
- Thermo Fisher Scientific Oy, Ratastie 2, 01620, Vantaa, Finland
| | - Kyösti Kauppinen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Juha Tuukkanen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Petri Lehenkari
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
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213
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Sukhorukov V, Gudelj I, Pučić-Baković M, Zakiev E, Orekhov A, Kontush A, Lauc G. Glycosylation of human plasma lipoproteins reveals a high level of diversity, which directly impacts their functional properties. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:643-653. [PMID: 30641224 DOI: 10.1016/j.bbalip.2019.01.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 12/18/2018] [Accepted: 01/06/2019] [Indexed: 01/25/2023]
Abstract
AIMS Human plasma lipoproteins are known to contain various glycan structures whose composition and functional importance are starting to be recognized. We assessed N-glycosylation of human plasma HDL and LDL and the role of their glycomes in cellular cholesterol metabolism. METHODS N-glycomic profiles of native and neuraminidase-treated HDL and LDL were obtained using HILIC-UHPLC-FLD. Relative abundance of the individual chromatographic peaks was quantitatively expressed as a percentage of total integrated area and N-glycan structures present in each peak were elucidated by MALDI-TOF MS. The capacity of HDL to mediate cellular efflux of cholesterol and the capacity of LDL to induce cellular accumulation of cholesteryl esters were evaluated in THP-1 cells. RESULTS HILIC-UHPLC-FLD analysis of HDL and LDL N-glycans released by PNGase F resulted in 22 and 18 distinct chromatographic peaks, respectively. The majority of N-glycans present in HDL (~70%) and LDL (~60%) were sialylated with one or two sialic acid residues. The most abundant N-glycan structure in both HDL and LDL was a complex type biantennary N-glycan with one sialic acid (A2G2S1). Relative abundances of several N-glycan structures were dramatically altered by the neuraminidase treatment, which selectively removed sialic acid residues. Native HDL displayed significantly greater efficacy in removing cellular cholesterol from THP-1 cells as compared to desialylated HDL (p < 0.05). Cellular accumulation of cholesteryl esters in THP-1 cells was significantly higher after incubations with desialylated LDL particles as compared to native LDL (p < 0.05). CONCLUSIONS N-glycome of human plasma lipoproteins reveals a high level of diversity, which directly impacts functional properties of the lipoproteins.
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Affiliation(s)
- Vasily Sukhorukov
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia; National Institute for Health and Medical Research (INSERM), UMR 1166 ICAN, Paris F-75013, France; Sorbonne University, Paris F-75013, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris F-75013, France; Federal State Budget Institution of Sciences Institute of Gene Biology, Russian Academy of Sciences, Vavilova Str., 34/5, Moscow 119334, Russia
| | - Ivan Gudelj
- Genos Glycoscience Research Laboratory, Borongajska cesta 83H, HR-10 000 Zagreb, Croatia
| | - Maja Pučić-Baković
- Genos Glycoscience Research Laboratory, Borongajska cesta 83H, HR-10 000 Zagreb, Croatia
| | - Emile Zakiev
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia; National Institute for Health and Medical Research (INSERM), UMR 1166 ICAN, Paris F-75013, France; Sorbonne University, Paris F-75013, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris F-75013, France; Federal State Budget Institution of Sciences Institute of Gene Biology, Russian Academy of Sciences, Vavilova Str., 34/5, Moscow 119334, Russia
| | - Alexander Orekhov
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, 121609 Moscow, Russia
| | - Anatol Kontush
- National Institute for Health and Medical Research (INSERM), UMR 1166 ICAN, Paris F-75013, France; Sorbonne University, Paris F-75013, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris F-75013, France.
| | - Gordan Lauc
- Genos Glycoscience Research Laboratory, Borongajska cesta 83H, HR-10 000 Zagreb, Croatia
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214
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Carlevaro G, Lantos AB, Cánepa GE, de Los Milagros Cámara M, Somoza M, Buscaglia CA, Campetella O, Mucci J. Metabolic Labeling of Surface Neo-sialylglyconjugates Catalyzed by Trypanosoma cruzi trans-Sialidase. Methods Mol Biol 2019; 1955:135-146. [PMID: 30868524 DOI: 10.1007/978-1-4939-9148-8_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Trypanosoma cruzi, the protozoan agent of Chagas disease, has evolved an innovative metabolic pathway by which protective sialic acid (SA) residues are scavenged from host sialylglycoconjugates and transferred onto parasite surface mucin-like molecules (or surface glycoconjugates from host target cells) by means of a unique trans-sialidase (TS) enzyme. TS-induced changes in the glycoprotein sialylation profile of both parasite and host cells are crucial for the establishment of a persistent T. cruzi infection and for the development of Chagas disease-associated pathogenesis. In this chapter, we describe a novel metabolic labeling method developed in our labs that enables straightforward identification and molecular characterization of SA acceptors of the TS-catalyzed reaction.
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Affiliation(s)
- Giannina Carlevaro
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Andrés B Lantos
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.,Laboratorio Dr. Lantos, Buenos Aires, Argentina
| | - Gaspar E Cánepa
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.,Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - María de Los Milagros Cámara
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.,Instituto de Tecnología, Universidad Argentina de la Empresa (UADE), Buenos Aires, Argentina
| | - Martín Somoza
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Carlos A Buscaglia
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Oscar Campetella
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Juan Mucci
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, San Martín, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.
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215
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Tasnima N, Yu H, Yan X, Li W, Xiao A, Chen X. Facile chemoenzymatic synthesis of Lewis a (Le a) antigen in gram-scale and sialyl Lewis a (sLe a) antigens containing diverse sialic acid forms. Carbohydr Res 2018; 472:115-121. [PMID: 30562693 DOI: 10.1016/j.carres.2018.12.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/07/2018] [Accepted: 12/07/2018] [Indexed: 01/08/2023]
Abstract
An efficient streamlined chemoenzymatic approach has been developed for gram-scale synthesis of Lewis a angtigen (LeaβProN3) and a library of sialyl Lewis a antigens (sLeaβProN3) containing different sialic acid forms. Intially, commercially available inexpensive N-acetylglucosamine (GlcNAc) was converted to its N'-glycosyl p-toluenesulfonohydrazide in one step. Followed by chemical glycosylation, GlcNAcβProN3 was synthesized using this protecting group-free method in high yield (82%). Sequential one-pot multienzyme (OPME) β1-3-galactosylation of GlcNAcβProN3 followed by OPME α1-4-fucosylation reactions produced target LeaβProN3 in gram-scale. Structurally diverse sialic acid forms was successfully introduced using a OPME sialylation reation containing a CMP-sialic acid synthetase and Pasteurella multocida α2-3-sialyltransferase 1 (PmST1) mutant PmST1 M144D with or without a sialic acid aldolase to form sLeaβProN3 containing naturally occurring or non-natural sialic acid forms in preparative scales.
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Affiliation(s)
- Nova Tasnima
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Hai Yu
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Xuebin Yan
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Wanqing Li
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - An Xiao
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Xi Chen
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA.
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216
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Demina EP, Pierre WC, Nguyen ALA, Londono I, Reiz B, Zou C, Chakraberty R, Cairo CW, Pshezhetsky AV, Lodygensky GA. Persistent reduction in sialylation of cerebral glycoproteins following postnatal inflammatory exposure. J Neuroinflammation 2018; 15:336. [PMID: 30518374 PMCID: PMC6282350 DOI: 10.1186/s12974-018-1367-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 11/14/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The extension of sepsis encompassing the preterm newborn's brain is often overlooked due to technical challenges in this highly vulnerable population, yet it leads to substantial long-term neurodevelopmental disabilities. In this study, we demonstrate how neonatal neuroinflammation following postnatal E. coli lipopolysaccharide (LPS) exposure in rat pups results in persistent reduction in sialylation of cerebral glycoproteins. METHODS Male Sprague-Dawley rat pups at postnatal day 3 (P3) were injected in the corpus callosum with saline or LPS. Twenty-four hours (P4) or 21 days (P24) following injection, brains were extracted and analyzed for neuraminidase activity and expression as well as for sialylation of cerebral glycoproteins and glycolipids. RESULTS At both P4 and P24, we detected a significant increase of the acidic neuraminidase activity in LPS-exposed rats. It correlated with significantly increased neuraminidase 1 (Neu1) mRNA in LPS-treated brains at P4 and with neuraminidases 1 and 4 at P24 suggesting that these enzymes were responsible for the rise of neuraminidase activity. At both P4 and P24, sialylation of N-glycans on brain glycoproteins decreased according to both mass-spectrometry analysis and lectin blotting, but the ganglioside composition remained intact. Finally, at P24, analysis of brain tissues by immunohistochemistry showed that neurons in the upper layers (II-III) of somatosensory cortex had a reduced surface content of polysialic acid. CONCLUSIONS Together, our data demonstrate that neonatal LPS exposure results in specific and sustained induction of Neu1 and Neu4, causing long-lasting negative changes in sialylation of glycoproteins on brain cells. Considering the important roles played by sialoglycoproteins in CNS function, we speculate that observed re-programming of the brain sialome constitutes an important part of pathophysiological consequences in perinatal infectious exposure.
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Affiliation(s)
- Ekaterina P Demina
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada
| | - Wyston C Pierre
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada
| | - Annie L A Nguyen
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada
| | - Irene Londono
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada
| | - Bela Reiz
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, AB, Canada
| | - Chunxia Zou
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, AB, Canada
| | - Radhika Chakraberty
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, AB, Canada
| | - Christopher W Cairo
- Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, AB, Canada
| | - Alexey V Pshezhetsky
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada. .,Department of Anatomy and Cell Biology, McGill University, Montreal, H3A0C7, QC, Canada. .,Centre de recherche, CHU Sainte-Justine, 3175 Côte-Sainte-Catherine, Montreal, QC, H3T 1C5, Canada.
| | - Gregory A Lodygensky
- Department of Paediatrics, Sainte-Justine Hospital Research Center, Université de Montréal, Montreal, H3T 1C5, QC, Canada. .,Department of Pharmacology and Physiology, Université de Montréal, Montreal, H3T 1J4, QC, Canada. .,Montreal Heart Institute, Montreal, H1T 1C8, QC, Canada. .,Centre de recherche, CHU Sainte-Justine, 3175 Côte-Sainte-Catherine, Montreal, QC, H3T 1C5, Canada.
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217
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Wielgat P, Trofimiuk E, Czarnomysy R, Braszko JJ, Car H. Sialic acids as cellular markers of immunomodulatory action of dexamethasone on glioma cells of different immunogenicity. Mol Cell Biochem 2018; 455:147-157. [PMID: 30443853 PMCID: PMC6445812 DOI: 10.1007/s11010-018-3478-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/09/2018] [Indexed: 01/17/2023]
Abstract
Glucocorticosteroids, including dexamethasone (Dex), are commonly used to control tumor-induced edema in the brain tumor patients. There are increasing evidences that immunosuppressive action of Dex interferes with immune surveillance resulting in lower patients overall survival; however, the mechanisms underlying these actions remain unclear. Changes in the expression of sialic acids are critical features of many cancers that reduce their immunogenicity and increase viability. Sialoglycans can be recognized by CD33-related Siglecs that negatively regulate the immune response and thereby impair immune surveillance. In this study, we analysed the effect of Dex on cell surface sialylation pattern and recognition of these structures by Siglec-F receptor in poorly immunogenic GL261 and immunogenic SMA560 glioma cells. Relative amount of α2.3-, α2.6- and α2.8-linked sialic acids were detected by Western blot with MAA (Maackia amurensis) and SNA (Sambucus nigra) lectins, and flow cytometry using monoclonal antibody anti-PSA-NCAM. In response to Dex, α2.8 sialylation in both, GL261 and SMA560 was increased, whereas the level of α2.3-linked sialic acids remained unchanged. Moreover, we found the opposite effects of Dex on α2.6 sialylation in poorly immunogenic and immunogenic glioma cells. Furthermore, changes in sialylation pattern were accompanied by dose-dependent effects of Dex on Siglec-F binding to glioma cell membranes as well as decreased α-neuraminidase activity. These results suggest that glucocorticosteroid-induced alterations in cell surface sialylation and Siglecs recognition may dampen anti-tumor immunity, and participate in glioma-promoting process by immune cells. Our study gives new view on corticosteroid therapy in glioma patients.
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Affiliation(s)
- Przemyslaw Wielgat
- Department of Clinical Pharmacology, Medical University of Bialystok, Waszyngtona 15A, 15-274, Bialystok, Poland.
| | - Emil Trofimiuk
- Department of Clinical Pharmacology, Medical University of Bialystok, Waszyngtona 15A, 15-274, Bialystok, Poland
| | - Robert Czarnomysy
- Department of Synthesis and Technology of Drugs, Medical University of Bialystok, Kilińskiego 1, 15-089, Bialystok, Poland
| | - Jan J Braszko
- Department of Clinical Pharmacology, Medical University of Bialystok, Waszyngtona 15A, 15-274, Bialystok, Poland
| | - Halina Car
- Department of Clinical Pharmacology, Medical University of Bialystok, Waszyngtona 15A, 15-274, Bialystok, Poland
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218
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Glanz VY, Myasoedova VA, Grechko AV, Orekhov AN. Sialidase activity in human pathologies. Eur J Pharmacol 2018; 842:345-350. [PMID: 30439363 DOI: 10.1016/j.ejphar.2018.11.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/03/2018] [Accepted: 11/09/2018] [Indexed: 02/06/2023]
Abstract
Sialic acid residues are frequently located at the terminal positions of glycoconjugate chains of cellular glycocalyx. Sialidases, or neuraminidases, catalyse removal of these residues thereby modulating various normal and pathological cellular activities. Recent studies have revealed the involvement of sialidases in a wide range of human disorders, including neurodegenerative disorders, cancers, infectious diseases and cardiovascular diseases. The accumulating data make sialidases an interesting potential therapeutic target. Modulating the activity of these enzymes may have beneficial effects in several pathologies. Four types of mammalian sialidases have been described: NEU1, NEU2, NEU3 and NEU4. They are encoded by different genes and characterized by different subcellular localization. In this review, we will summarize the current knowledge on the roles of different sialidases in pathological conditions.
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Affiliation(s)
- Victor Yu Glanz
- Department of Genetics, Cytology and Bioengineering, Faculty of Biology and Medicine, Voronezh State University, Voronezh, Russia
| | - Veronika A Myasoedova
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia
| | - Andrey V Grechko
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 109240 Moscow, Russia
| | - Alexander N Orekhov
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia; Institute for Atherosclerosis Research, Skolkovo Innovative Center, 121609 Moscow, Russia; Centre of Collective Use, Institute of Gene Biology, Russian Academy of Sciences, Moscow 121552, Russia.
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219
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Abstract
Sialic acid-based glycoconjugates cover the surfaces of many different cell types, defining key properties of the cell surface such as overall charge or likely interaction partners. Because of this prominence, sialic acids play prominent roles in mediating attachment and entry to viruses belonging to many different families. In this review, we first describe how interactions between viruses and sialic acid-based glycan structures can be identified and characterized using a range of techniques. We then highlight interactions between sialic acids and virus capsid proteins in four different viruses, and discuss what these interactions have taught us about sialic acid engagement and opportunities to interfere with binding.
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Affiliation(s)
- Bärbel S Blaum
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
| | - Thilo Stehle
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany; Vanderbilt University School of Medicine, Nashville, TN, United States
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220
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Yuan P, Yang Z, Song H, Wang K, Yang Y, Xie L, Huang S, Liu J, Ran L, Song Z. Three Main Inducers of Alphacoronavirus Infection of Enterocytes: Sialic Acid, Proteases, and Low pH. Intervirology 2018; 61:53-63. [PMID: 30176660 PMCID: PMC7179561 DOI: 10.1159/000492424] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 07/19/2018] [Indexed: 12/19/2022] Open
Abstract
Transmissible gastroenteritis virus (TGEV) and porcine epidemic diarrhea virus (PEDV) are similar coronaviruses, causing diseases characterized by vomiting, diarrhea, and death from severe dehydration in piglets. Thus, they have caused huge losses to the swine-breeding industry worldwide. Nowadays, they are easily transmitted among the continents via vehicles, equipment, and cargo. Both viruses establish an infection in porcine enterocytes in the small intestine, and their spike (S) proteins play a key role in the virus-cell binding process under unfavorable conditions when the intestine with a low pH is filled with a thick layer of mucus and proteases. Sialic acid, proteases, and low pH are three main inducers of coronavirus infection. However, the details of how sialic acid and low pH affect virus binding to the host cell are not determined, and the functions of the proteases are unknown. This review emphasizes the role of three factors in the invasion of TGEV and PEDV into porcine enterocytes and offers more insights into Alphacoronavirus infection in the intestinal environment.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Zhenhui Song
- *Zhenhui Song, PhD, Department of Veterinary Medicine, College of Animal Science, Southwest University, Chongqing 402460 (People's Republic of China), E-Mail
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221
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Abstract
The sialylated glyconjugates (SGC) are found in abundance on the surface of brain cells, where they form a dense array of glycans mediating cell/cell and cell/protein recognition in numerous physiological and pathological processes. Metabolic genetic blocks in processing and catabolism of SGC result in development of severe storage disorders, dominated by CNS involvement including marked neuroinflammation and neurodegeneration, the pathophysiological mechanisms of which are still discussed. SGC patterns in the brain are cell and organelle-specific, dynamic and maintained by highly coordinated processes of their biosynthesis, trafficking, processing and catabolism. The changes in the composition of SGC during development and aging of the brain cannot be explained based solely on the regulation of the SGC-synthesizing enzymes, sialyltransferases, suggesting that neuraminidases (sialidases) hydrolysing the removal of terminal sialic acid residues also play an essential role. In the current review we summarize the roles of three mammalian neuraminidases: neuraminidase 1, neuraminidase 3 and neuraminidase 4 in processing brain SGC. Emerging data demonstrate that these enzymes with different, yet overlapping expression patterns, intracellular localization and substrate specificity play essential roles in the physiology of the CNS.
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Affiliation(s)
- Alexey V Pshezhetsky
- Sainte-Justine Hospital Research Center, Department of Paediatrics, University of Montreal, CHU Ste-Justine, Centre de recherche, 3175 Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada.
- Department of Anatomy and Cell Biology, McGill University, Montreal, H3A0C7, Canada.
| | - Mila Ashmarina
- Sainte-Justine Hospital Research Center, Department of Paediatrics, University of Montreal, CHU Ste-Justine, Centre de recherche, 3175 Côte-Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada
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222
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Dotz V, Lemmers RFH, Reiding KR, Hipgrave Ederveen AL, Lieverse AG, Mulder MT, Sijbrands EJG, Wuhrer M, van Hoek M. Plasma protein N-glycan signatures of type 2 diabetes. Biochim Biophys Acta Gen Subj 2018; 1862:2613-2622. [PMID: 30251656 DOI: 10.1016/j.bbagen.2018.08.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/30/2018] [Accepted: 08/03/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Little is known about enzymatic N-glycosylation in type 2 diabetes, a common posttranslational modification of proteins influencing their function and integrating genetic and environmental influences. We sought to gain insights into N-glycosylation to uncover yet unexplored pathophysiological mechanisms in type 2 diabetes. METHODS Using a high-throughput MALDI-TOF mass spectrometry method, we measured N-glycans in plasma samples of the DiaGene case-control study (1583 cases and 728 controls). Associations were investigated with logistic regression and adjusted for age, sex, body mass index, high-density lipoprotein-cholesterol, non-high-density lipoprotein-cholesterol, and smoking. Findings were replicated in a nested replication cohort of 232 cases and 108 controls. RESULTS Eighteen glycosylation features were significantly associated with type 2 diabetes. Fucosylation and bisection of diantennary glycans were decreased in diabetes (odds ratio (OR) = 0.81, p = 1.26E-03, and OR = 0.87, p = 2.84E-02, respectively), whereas total and, specifically, alpha2,6-linked sialylation were increased (OR = 1.38, p = 9.92E-07, and OR = 1.40, p = 5.48E-07). Alpha2,3-linked sialylation of triantennary glycans was decreased (OR = 0.60, p = 6.38E-11). CONCLUSIONS While some glycosylation changes were reflective of inflammation, such as increased alpha2,6-linked sialylation, our finding of decreased alpha2,3-linked sialylation in type 2 diabetes patients is contradictory to reports on acute and chronic inflammation. Thus, it might have previously unreported immunological implications in type 2 diabetes. GENERAL SIGNIFICANCE This study provides new insights into N-glycosylation patterns in type 2 diabetes, which can fuel studies on causal mechanisms and consequences of this complex disease.
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Affiliation(s)
- Viktoria Dotz
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands.
| | - Roosmarijn F H Lemmers
- Department of Internal Medicine, ErasmusMC, University Medical Center, Rotterdam, the Netherlands; Department of Internal Medicine, Máxima Medical Center, Eindhoven, the Netherlands.
| | - Karli R Reiding
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands.
| | | | - Aloysius G Lieverse
- Department of Internal Medicine, Máxima Medical Center, Eindhoven, the Netherlands.
| | - Monique T Mulder
- Department of Internal Medicine, ErasmusMC, University Medical Center, Rotterdam, the Netherlands.
| | - Eric J G Sijbrands
- Department of Internal Medicine, ErasmusMC, University Medical Center, Rotterdam, the Netherlands.
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands.
| | - Mandy van Hoek
- Department of Internal Medicine, ErasmusMC, University Medical Center, Rotterdam, the Netherlands.
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223
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Sáez-Espinosa P, Torrijo-Boix S, Huerta-Retamal N, Avilés M, Aizpurua J, Romero A, Gómez-Torres MJ. [Capacitation and acrosome reaction are associated with changes in sialic acid location and head morphometry in human sperm]. Rev Int Androl 2018; 16:20-7. [PMID: 30063019 DOI: 10.1016/j.androl.2017.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 01/13/2017] [Accepted: 03/12/2017] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Assess changes in sialic acid distribution during capacitation and acrosome reaction processes, and evaluate head sperm morphometrics modifications in these physiological conditions in human sperm. MATERIAL AND METHOD In this prospective study, we included 6 normozoospermics sperm samples. Sialic acid distribution was evaluated by Wheat germ agglutinin lectin in different physiological conditions: before, after capacitation and after acrosome reaction. Head shape and size of each stage were analyzed by means of geometric morphometric methods. RESULTS After capacitation, 73.07±21.43% of sperm showed sialic acid in acrosomal region, linked with an acrosome expansion and equatorial segment contraction. Otherwise, after acrosome reaction higher allometric effect between stages was recorded since sperm undergo further expansion of equatorial segment. Regarding Wheat germ agglutinin location, we found that sperm percentage significant decline in acrosomal fluorescence and an increase of equatorial band labeling. CONCLUSIONS Our findings demonstrate that modifications in Wheat germ agglutinin expression covariate with dramatic changes in sperm head morphometry, suggesting important implications in capacitation and acrosome reaction processes.
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224
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Xu Q, Shan Y, Wang N, Liu Y, Zhang M, Ma M. Sialic acid involves in the interaction between ovomucin and hemagglutinin and influences the antiviral activity of ovomucin. Int J Biol Macromol 2018; 119:533-539. [PMID: 30071221 PMCID: PMC7124660 DOI: 10.1016/j.ijbiomac.2018.07.186] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/23/2018] [Accepted: 07/29/2018] [Indexed: 11/27/2022]
Abstract
Ovomucin (OVM) plays an important role in inhibiting infection of various pathogens. However, this bioactivity mechanism is not much known. Here, the role of sialic acid in OVM anti-virus activity has been studied by ELISA with lectin or ligand. Structural changes of OVM after removing sialic acid were analyzed by circular dichroism and fluorescence spectroscopy. OVM could be binding to the hemagglutinin (HA) of avian influenza viruses H5N1 and H1N1, this binding was specific and required the involvement of sialic acid. When sialic acid was removed, the binding was significantly reduced 71.5% and 64.35%, respectively. Therefore, sialic acid was proved as a recognition site which avian influenza virus bound to. Meanwhile, the endogenous fluorescence and surface hydrophobicity of OVM removing sialic acid were increased and the secondary structure tended to shift to random coil. This indicated that OVM molecules were in an unfolded state and spatial conformation disorder raising weakly. Remarkably, free sialic acid strongly promoted OVM binding to HA and thereby enhanced the interaction. It may contribute to the inhibition of host cell infection, agglutinate viruses. This study can be extended to the deepening of passive immunization field.
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Affiliation(s)
- Qi Xu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, People's Republic of China
| | - Yuanyuan Shan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, People's Republic of China
| | - Ning Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, People's Republic of China
| | - Yaping Liu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, People's Republic of China
| | - Maojie Zhang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, People's Republic of China
| | - Meihu Ma
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, People's Republic of China.
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225
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Abstract
Sialic acids are negatively charged nine carbon monosaccharides located terminally on glycoproteins and glycolipids that control cellular physiological processes. Sialylation is a post translational modification (ptm) regulated by enzymes and has been studied in prokaryotes including bacteria, dueterostomes including vertebrates, Cephalochordates, Ascidians, Echinoderms and protostomes including Molluscs and Arthropods and Plant. Although diverse structures of sialylated molecules have been reported in different organisms, unravelling sialylation in insect biology is a completely new domain. Within protostomes, the study of sialylation in members of Phylum Arthropoda and Class Insecta finds importance. Reports on sialylation in some insects exist. Genetically engineered components of sialylation pathway in Spodoptera frugiperda (Sf9) cell lines have enabled our understanding of sialylation and expression of mammalian proteins in insects. In this study we have summarised the finding on (i) sialylated molecules (ii) processes and enzymes involved (iii) function of sialylation (iv) genetic engineering approaches and generation of mammalian protein expression systems (v) a comparison of sialylation machinery in insects with that of mammals (vi) genes and transcriptional regulation in insects. At present no information on structural studies of insect sialyltransferase (STs) exist. We report minor differences in ST structure in insects on complete protein sequences recorded in Genbank through in silico approaches. An indepth study of all the components of the sialylation pathway in different insect species across different families and their evolutionary significance finds importance as the future scope of this review.
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Affiliation(s)
- Shyamasree Ghosh
- School of Biological Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha, 752050, India. .,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India.
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226
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Abstract
Glycomacropeptide (GMP), a whey protein of milk, has functions including differentiation and development of nervous system, and anticancer and antiviral effects. To develop new functions, N-acetylneuraminic acid (NANA) containing 7% sialic acid was separated from GMP to produce G-7%NANA. N-glycolylneuraminic acid (Neu5Gc) is another type of sialic acid separated from GMP, which has been linked to immune disorders and chronic inflammation-mediated diseases. Therefore, safety was a concern in the use of G-7%NANA in functional foods. To ensure safety, in this study, three genetic toxicity tests on G-7%NANA were conducted. In the reverse mutation test using Salmonella typhimurium TA98, TA100, TA1535, TA1537, and Escherichia coli WP2uvrA, and in the chromosome aberration test using CHO-K1 cells, no significant differences from negative control were found at all dose levels. Similarly, no dose-related differences were evident compared to negative control in the micronucleus test using ICR mice. There was no evidence of G-7%NANA-related genetic toxicity.
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Affiliation(s)
- Ha-Young Kim
- GLP center and Department of Toxicity Assessment, Daegu Catholic University, Gyeongsan, Korea
| | - Min-Hee Kim
- GLP center and Department of Toxicity Assessment, Daegu Catholic University, Gyeongsan, Korea
| | | | - Yeong-Chul Park
- GLP center and Department of Toxicity Assessment, Daegu Catholic University, Gyeongsan, Korea
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227
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Zheng N, Wang S, Su X, Han S. Liposome-aided metabolic engineering of tumor surface immunogenicity. Bioorg Med Chem Lett 2018; 28:2550-2554. [PMID: 29941189 DOI: 10.1016/j.bmcl.2018.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 05/16/2018] [Accepted: 05/16/2018] [Indexed: 12/27/2022]
Abstract
Approaches to increase tumor immunogenicity are of therapeutic potentials. We herein reported the use of liposomes for covalent incorporation of neoantigen on tumor surfaces with DNP-conjugated sialic acid (DNPSia). Relative to free DNPSia, sugar-encapsulated biotinylated liposomes (DNPSia@LP@biotin) enables effective cell surface expression of DNPSia on biotin receptor (BR)-expressing cells over BR-free cells in vitro, and on tumor cell surfaces with high tumor-to-normal tissue contrast in a mice model. These findings suggest the potentials of targetable liposomes for modulating tumor surface immunity via metabolic oligosaccharide engineering.
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Affiliation(s)
- Nianfeng Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Siyu Wang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Xinhui Su
- Department of Nuclear Medicine, Zhongshan Hospital Xiamen University, Xiamen 361004, China.
| | - Shoufa Han
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China.
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228
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Liang L, Shen Y, Zhang J, Xu S, Xu W, Liang C, Han B. Identification of breast cancer through spectroscopic analysis of cell-membrane sialic acid expression. Anal Chim Acta 2018; 1033:148-155. [PMID: 30172320 DOI: 10.1016/j.aca.2018.04.072] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/24/2018] [Accepted: 04/30/2018] [Indexed: 12/17/2022]
Abstract
Identification of specific and reliable biomarkers or unique characteristics is significant for cancer molecular diagnosis and cancer therapeutic assessment. As a biomarker, sialic acid expression in human biofluid or on cell surface is one of interest to determine the tumor malignancy and metastasis since it involves in many crucial metabolic processes. In this work, we aimed to develop a molecular diagnosis method to make it possible to distinguish human breast cancer and normal tissues by capturing rich spectral features of phenyboronic acid-based nanoprobe (MPBA@AgNP) when it binds to sialic acid on cell surface. We analyzed and found that the marker bands at 1074 and 1570 cm-1 recorded by Surface-enhanced Raman spectroscopy (SERS) displayed discernible spectral differences in vitro cell lines. Density functional theory (DFT) was further used to explore and support the detailed changes of vibrational modes affected by sialic acid. This method is generally applicable by testing three types of in vitro cell lines (HepG2, Hela, BNL.CL2) and one pair of the tissue sections (cancer tissue and normal tissue) from the human breast regions. Besides, the area under receiver operating characteristic (ROC) curves for 1074 and 1572 cm-1 are 0.9419 and 0.9023, confirming determination of the specific molecular expression by the spectral features holds potential promise for improving cancer detection accuracy. Furthermore, sialic acid expression and distribution acquired of breast tissues by confocal SERS mapping further indicated our method is possible for cancer early diagnosis and toward to real-time in vivo study.
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Affiliation(s)
- Lijia Liang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, 130012, People's Republic of China
| | - Yanting Shen
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, 130012, People's Republic of China
| | - Jing Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, 130012, People's Republic of China
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, 130012, People's Republic of China.
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, 130012, People's Republic of China
| | - Chongyang Liang
- Institute of Frontier Medical Science, Jilin University, Changchun, 130021, People's Republic of China
| | - Bing Han
- Department of Breast Surgery, The First Hospital of Jilin University, Changchun, 130021, People's Republic of China
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229
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Pogoryelova O, González Coraspe JA, Nikolenko N, Lochmüller H, Roos A. GNE myopathy: from clinics and genetics to pathology and research strategies. Orphanet J Rare Dis 2018; 13:70. [PMID: 29720219 PMCID: PMC5930817 DOI: 10.1186/s13023-018-0802-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 04/09/2018] [Indexed: 01/07/2023] Open
Abstract
GNE myopathy is an ultra-rare autosomal recessive disease, which starts as a distal muscle weakness and ultimately leads to a wheelchair bound state. Molecular research and animal modelling significantly moved forward understanding of GNE myopathy mechanisms and suggested therapeutic interventions to alleviate the symptoms. Multiple therapeutic attempts are being made to supplement sialic acid depleted in GNE myopathy muscle cells. Translational research field provided valuable knowledge through natural history studies, patient registries and clinical trial, which significantly contributed to bringing forward an era of GNE myopathy treatment. In this review, we are summarising current GNE myopathy, scientific trends and open questions, which would be of significant interest for a wide neuromuscular diseases community.
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Affiliation(s)
- Oksana Pogoryelova
- Institute of Genetic Medicine, International Centre for Life, Central Parkway, Newcastle upon Tyne, UK
| | | | - Nikoletta Nikolenko
- Institute of Genetic Medicine, International Centre for Life, Central Parkway, Newcastle upon Tyne, UK
| | - Hanns Lochmüller
- Institute of Genetic Medicine, International Centre for Life, Central Parkway, Newcastle upon Tyne, UK.,Present Address: Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany.,Centro Nacional de Análisis Genómico, Center for Genomic Regulation (CNAG-CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Catalonia, Spain
| | - Andreas Roos
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, Biomedical Research Department, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany.
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230
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Del Mar Amador M, Colsch B, Lamari F, Jardel C, Ichou F, Rastetter A, Sedel F, Jourdan F, Frainay C, Wevers RA, Roze E, Depienne C, Junot C, Mochel F. Targeted versus untargeted omics - the CAFSA story. J Inherit Metab Dis 2018; 41:447-456. [PMID: 29423831 DOI: 10.1007/s10545-017-0134-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/11/2017] [Accepted: 12/28/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND In 2009, untargeted metabolomics led to the delineation of a new clinico-biological entity called cerebellar ataxia with elevated cerebrospinal free sialic acid, or CAFSA. In order to elucidate CAFSA, we applied sequentially targeted and untargeted omic approaches. METHODS AND RESULTS First, we studied five of the six CAFSA patients initially described. Besides increased CSF free sialic acid concentrations, three patients presented with markedly decreased 5-methyltetrahydrofolate (5-MTHF) CSF concentrations. Exome sequencing identified a homozygous POLG mutation in two affected sisters, but failed to identify a causative gene in the three sporadic patients with high sialic acid but low 5-MTHF. Using targeted mass spectrometry, we confirmed that free sialic acid was increased in the CSF of a third known POLG-mutated patient. We then pursued pathophysiological analyses of CAFSA using mass spectrometry-based metabolomics on CSF from two sporadic CAFSA patients as well as 95 patients with an unexplained encephalopathy and 39 controls. This led to the identification of a common metabotype between the two initial CAFSA patients and three additional patients, including one patient with Kearns-Sayre syndrome. Metabolites of the CSF metabotype were positioned in a reconstruction of the human metabolic network, which highlighted the proximity of the metabotype with acetyl-CoA and carnitine, two key metabolites regulating mitochondrial energy homeostasis. CONCLUSION Our genetic and metabolomics analyses suggest that CAFSA is a heterogeneous entity related to mitochondrial DNA alterations either through POLG mutations or a mechanism similar to what is observed in Kearns-Sayre syndrome.
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Affiliation(s)
- Maria Del Mar Amador
- Assistance Publique-Hôpitaux de Paris, Département de Neurologie, La Pitié-Salpêtrière University Hospital, Paris, France
| | - Benoit Colsch
- Service de Pharmacologie et Immuno-Analyse (SPI), Laboratoire d'Etude du Métabolisme des Médicaments, CEA, INRA, Université Paris Saclay, MetaboHUB, F-91191, Gif-sur-Yvette, France
| | - Foudil Lamari
- Assistance Publique-Hôpitaux de Paris, Laboratoire de Biochimie Métabolique, La Pitié-Salpêtrière University Hospital, Paris, France
- Université Pierre et Marie Curie, Groupe de Recherche Clinique Neurométabolique et Centre de Référence Neurométabolique Adulte, Paris, France
| | - Claude Jardel
- Assistance Publique-Hôpitaux de Paris, Laboratoire de Biochimie Métabolique, La Pitié-Salpêtrière University Hospital, Paris, France
- Université Pierre et Marie Curie, Groupe de Recherche Clinique Neurométabolique et Centre de Référence Neurométabolique Adulte, Paris, France
| | - Farid Ichou
- Institute of Cardiometabolism And Nutrition, ICAN, Metabolomics Core Facility, Paris, France
| | - Agnès Rastetter
- Sorbonne Universités, UPMC-Paris 6, UMR S 1127, and Inserm U 1127, and CNRS UMR 7225, and ICM, F-75013, Paris, France
| | | | - Fabien Jourdan
- Université de Toulouse, INRA, Université de Toulouse 3 Paul Sabatier, Toulouse, France
| | - Clément Frainay
- Université de Toulouse, INRA, Université de Toulouse 3 Paul Sabatier, Toulouse, France
| | - Ronald A Wevers
- Radboud University Medical Centre, Translational Metabolic Laboratory, Department Laboratory Medicine, Nijmegen, the Netherlands
| | - Emmanuel Roze
- Assistance Publique-Hôpitaux de Paris, Département de Neurologie, La Pitié-Salpêtrière University Hospital, Paris, France
- Université Pierre et Marie Curie, Groupe de Recherche Clinique Neurométabolique et Centre de Référence Neurométabolique Adulte, Paris, France
- Sorbonne Universités, UPMC-Paris 6, UMR S 1127, and Inserm U 1127, and CNRS UMR 7225, and ICM, F-75013, Paris, France
| | - Christel Depienne
- Hôpitaux Universitaires de Strasbourg, Unité de cytogénétique chromosomique et moléculaire, Strasbourg, France
| | - Christophe Junot
- Service de Pharmacologie et Immuno-Analyse (SPI), Laboratoire d'Etude du Métabolisme des Médicaments, CEA, INRA, Université Paris Saclay, MetaboHUB, F-91191, Gif-sur-Yvette, France
| | - Fanny Mochel
- Université Pierre et Marie Curie, Groupe de Recherche Clinique Neurométabolique et Centre de Référence Neurométabolique Adulte, Paris, France.
- Sorbonne Universités, UPMC-Paris 6, UMR S 1127, and Inserm U 1127, and CNRS UMR 7225, and ICM, F-75013, Paris, France.
- Assistance Publique-Hôpitaux de Paris, Département de Génétique, La Pitié-Salpêtrière University Hospital, Paris, France.
- Reference Center for Neurometabolic Diseases, Department of Genetics, La Pitié-Salpêtrière University Hospital, 47 Boulevard de l'Hôpital, 75013, Paris, France.
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231
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Betteridge KB, Arkill KP, Neal CR, Harper SJ, Foster RR, Satchell SC, Bates DO, Salmon AHJ. Sialic acids regulate microvessel permeability, revealed by novel in vivo studies of endothelial glycocalyx structure and function. J Physiol 2018; 595:5015-5035. [PMID: 28524373 PMCID: PMC5538239 DOI: 10.1113/jp274167] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 05/08/2017] [Indexed: 12/15/2022] Open
Abstract
Key points We have developed novel techniques for paired, direct, real‐time in vivo quantification of endothelial glycocalyx structure and associated microvessel permeability. Commonly used imaging and analysis techniques yield measurements of endothelial glycocalyx depth that vary by over an order of magnitude within the same vessel. The anatomical distance between maximal glycocalyx label and maximal endothelial cell plasma membrane label provides the most sensitive and reliable measure of endothelial glycocalyx depth. Sialic acid residues of the endothelial glycocalyx regulate glycocalyx structure and microvessel permeability to both water and albumin.
Abstract The endothelial glycocalyx forms a continuous coat over the luminal surface of all vessels, and regulates multiple vascular functions. The contribution of individual components of the endothelial glycocalyx to one critical vascular function, microvascular permeability, remains unclear. We developed novel, real‐time, paired methodologies to study the contribution of sialic acids within the endothelial glycocalyx to the structural and functional permeability properties of the same microvessel in vivo. Single perfused rat mesenteric microvessels were perfused with fluorescent endothelial cell membrane and glycocalyx labels, and imaged with confocal microscopy. A broad range of glycocalyx depth measurements (0.17–3.02 μm) were obtained with different labels, imaging techniques and analysis methods. The distance between peak cell membrane and peak glycocalyx label provided the most reliable measure of endothelial glycocalyx anatomy, correlating with paired, numerically smaller values of endothelial glycocalyx depth (0.078 ± 0.016 μm) from electron micrographs of the same portion of the same vessel. Disruption of sialic acid residues within the endothelial glycocalyx using neuraminidase perfusion decreased endothelial glycocalyx depth and increased apparent solute permeability to albumin in the same vessels in a time‐dependent manner, with changes in all three true vessel wall permeability coefficients (hydraulic conductivity, reflection coefficient and diffusive solute permeability). These novel technologies expand the range of techniques that permit direct studies of the structure of the endothelial glycocalyx and dependent microvascular functions in vivo, and demonstrate that sialic acid residues within the endothelial glycocalyx are critical regulators of microvascular permeability to both water and albumin. We have developed novel techniques for paired, direct, real‐time in vivo quantification of endothelial glycocalyx structure and associated microvessel permeability. Commonly used imaging and analysis techniques yield measurements of endothelial glycocalyx depth that vary by over an order of magnitude within the same vessel. The anatomical distance between maximal glycocalyx label and maximal endothelial cell plasma membrane label provides the most sensitive and reliable measure of endothelial glycocalyx depth. Sialic acid residues of the endothelial glycocalyx regulate glycocalyx structure and microvessel permeability to both water and albumin.
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Affiliation(s)
- Kai B Betteridge
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK
| | - Kenton P Arkill
- School of Medicine, Faculty of Medicine and Health Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK.,Biofisika Institute (CSIC UPV/EHU) and Research Centre for Experimental Marine Biology and Biotechnology (PiE), University of the Basque Country, Spain
| | - Christopher R Neal
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK
| | - Steven J Harper
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK
| | - Rebecca R Foster
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK
| | - Simon C Satchell
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK
| | - David O Bates
- School of Medicine, Faculty of Medicine and Health Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Andrew H J Salmon
- Bristol Renal, Schools of Clinical Sciences and Physiology & Pharmacology, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK.,Renal Service, Specialist Medicine and Health of Older People, Waitemata DHB, Auckland, New Zealand
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232
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Quek MC, Chin NL, Yusof YA, Law CL, Tan SW. Characterization of edible bird's nest of different production, species and geographical origins using nutritional composition, physicochemical properties and antioxidant activities. Food Res Int 2018; 109:35-43. [PMID: 29803459 DOI: 10.1016/j.foodres.2018.03.078] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 03/14/2018] [Accepted: 03/28/2018] [Indexed: 02/05/2023]
Abstract
Edible bird's nest (EBN) is a precious food made from the solidified saliva of swiftlets. EBN from three types of origin, namely production, swiftlet species and geographical were characterised based on its nutritional composition, physicochemical properties and antioxidant properties. Proximate composition, total phenolic content (TPC) and antioxidant activities were determined following official methods, while mineral and heavy metal contents were obtained by respective atomic adsorption spectrometry (AAS) and inductively coupled plasma-mass spectrometry (ICP-MS). Amino acids profile and sialic acid were determined using high performance liquid chromatography (HPLC). Calcium and sodium were the major elements in EBN samples at averages of 17,267 mg/kg and 13,681 mg/kg, respectively. Despite protein contents were not significantly different; interestingly the total amino acids in A. fuciphagus EBN, 64.57 g/100 g was found to be 23% higher than in A. maximus EBN. EBN from house, A. fuciphagus and Peninsular Malaysia had greater antioxidant activities, 2.33-3.49 mg AAE/g and higher sialic acid, 13.57 g/100 g while those from cave, A. maximus and East Malaysia contained more minerals like calcium and magnesium. The 1, 1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity and ferric ion reducing antioxidant power (FRAP) of house, A. fuciphagus and Peninsular Malaysia EBNs were approximately 2 times greater than the others. All samples were complied with the Malaysian Standard MS 2334:2011, except for mercury and nitrite. The overall findings suggest that the quality of EBN was varied following the production, species and geographical origins.
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Affiliation(s)
- Meei Chien Quek
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Nyuk Ling Chin
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
| | - Yus Aniza Yusof
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
| | - Chung Lim Law
- Department of Chemical Engineering, Faculty of Engineering, University of Nottingham, Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Sheau Wei Tan
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
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233
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Argov Z, Caraco Y, Lau H, Pestronk A, Shieh PB, Skrinar A, Koutsoukos T, Ahmed R, Martinisi J, Kakkis E. Aceneuramic Acid Extended Release Administration Maintains Upper Limb Muscle Strength in a 48-week Study of Subjects with GNE Myopathy: Results from a Phase 2, Randomized, Controlled Study. J Neuromuscul Dis 2018; 3:49-66. [PMID: 27854209 PMCID: PMC5271423 DOI: 10.3233/jnd-159900] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Background: GNE Myopathy (GNEM) is a progressive adult-onset myopathy likely caused by deficiency of sialic acid (SA) biosynthesis. Objective: Evaluate the safety and efficacy of SA (delivered by aceneuramic acid extended-release [Ace-ER]) as treatment for GNEM. Methods: A Phase 2, randomized, double-blind, placebo-controlled study evaluating Ace-ER 3 g/day or 6 g/day versus placebo was conducted in GNEM subjects (n = 47). After the first 24 weeks, placebo subjects crossed over to 3 g/day or 6 g/day for 24 additional weeks (dose pre-assigned during initial randomization). Assessments included serum SA, muscle strength by dynamometry, functional assessments, clinician- and patient-reported outcomes, and safety. Results: Dose-dependent increases in serum SA levels were observed. Supplementation with Ace-ER resulted in maintenance of muscle strength in an upper extremity composite (UEC) score at 6 g/day compared with placebo at Week 24 (LS mean difference +2.33 kg, p = 0.040), and larger in a pre-specified subgroup able to walk ≥200 m at Screening (+3.10 kg, p = 0.040). After cross-over, a combined 6 g/day group showed significantly better UEC strength than a combined 3 g/day group (+3.46 kg, p = 0.0031). A similar dose-dependent response was demonstrated within the lower extremity composite score, but was not significant (+1.06 kg, p = 0.61). The GNEM-Functional Activity Scale demonstrated a trend improvement in UE function and mobility in a combined 6 g/day group compared with a combined 3 g/day group. Patients receiving Ace-ER tablets had predominantly mild-to-moderate AEs and no serious adverse events. Conclusions: This is the first clinical study to provide evidence that supplementation with SA delivered by Ace-ER may stabilize muscle strength in individuals with GNEM and initiating treatment earlier in the disease course may lead to better outcomes.
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Affiliation(s)
- Zohar Argov
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Yoseph Caraco
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Heather Lau
- New York University School of Medicine, New York, NY, USA
| | - Alan Pestronk
- Washington University Medical Center, St. Louis, MO, USA
| | - Perry B Shieh
- University of California Los Angeles Medical Center, Los Angeles, CA, USA
| | | | | | - Ruhi Ahmed
- Ultragenyx Pharmaceutical, Novato, CA, USA
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234
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Holownia A, Wielgat P, Eljaszewicz A. MicroRNA-9 and Cell Proliferation in Lipopolysaccharide and Dexamethasone-Treated Naïve and Desialylated A549 Cells Grown in Cigarette Smoke Conditioned Medium. Adv Exp Med Biol 2019; 1113:37-42. [PMID: 29492899 DOI: 10.1007/5584_2018_168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
In this study we assessed microRNA-9 (miR-9) levels (RT-PCR) and cell proliferation (flow cytometry) in naïve and desialylated human alveolar epithelial cells (A549 cells), grown for 24 h in cigarette smoke-conditioned medium. Cells were additionally treated with lipopolysaccharide (LPS) and/or dexamethasone. Proliferation positively correlated with miR-9 levels in both naïve and desialylated cells. Cigarette smoke decreased miR-9 levels in both cell types by about three-fold but there was no significant correlation between both parameters. Dexamethasone was without substantial effect on cigarette smoke-induced changes in proliferation of naïve cells, but some normalization was observed in desialylated cells. Dexamethasone increased miR-9 levels in both cell types grown in cigarette smoke-medium but the effect was stronger in desialylated cells. LPS increased cell proliferation and miR-9 by more than six-fold only in naïve cells, while correlation coefficient for both parameters in cigarette smoke-LPS group was 0.41. Herein we identify miR-9 as the cigarette smoke (decrease) and LPS-responsive but dexamethasone-unresponsive microRNA. It is possible that increased miR-9 levels in naïve A549 cells treated with LPS may be related to the activation of Toll-like receptor 4. Moreover, differences in cell response (both miR-9 and proliferation) to dexamethasone in naïve and desialylated cells may point to non-genomic dexamethasone effects.
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235
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Cheng HW, Wang HW, Wong TY, Yeh HW, Chen YC, Liu DZ, Liang PH. Synthesis of S-linked NeuAc-α(2-6)-di-LacNAc bearing liposomes for H1N1 influenza virus inhibition assays. Bioorg Med Chem 2018; 26:2262-2270. [PMID: 29472127 DOI: 10.1016/j.bmc.2018.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/07/2018] [Accepted: 02/10/2018] [Indexed: 10/18/2022]
Abstract
S-NeuAc-α(2-6)-di-LacNAc (5) was efficiently synthesized by a [2+2] followed by a [1+4] glycosylation, and later conjugated with 1,2-dilauroyl-sn-glycero-3-phosphoethanolamine (DLPE) to form both single-layer and multi-layer homogeneous liposomes in the presence of dipalmitoyl phosphatidylcholine (DPPC) and cholesterol. These liposomes were found to be weak inhibitors in both the influenza virus entry assay and the hemagglutination inhibition assay. The single layer liposome was found to more efficiently interfere with the entry of the H1N1 influenza virus into MDCK cells than the multilayer liposome containing 5.
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Affiliation(s)
- Hou-Wen Cheng
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Hsiao-Wen Wang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Tsung-Yun Wong
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Hsien-Wei Yeh
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Yi-Chun Chen
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Der-Zen Liu
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; Medical and Pharmaceutical Industry Technology and Development Center, Academia Sinica, Taipei 128, Taiwan
| | - Pi-Hui Liang
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan; The Genomics Research Center, Academia Sinica, Taipei 128, Taiwan.
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236
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Thi Sam N, Misaki R, Ohashi T, Fujiyama K. Enhancement of glycosylation by stable co-expression of two sialylation-related enzymes on Chinese hamster ovary cells. J Biosci Bioeng 2018; 126:102-110. [PMID: 29439861 DOI: 10.1016/j.jbiosc.2018.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/28/2017] [Accepted: 01/12/2018] [Indexed: 10/18/2022]
Abstract
Sialic acid plays important roles in stabilization and modulation of the interaction of molecules and membranes in organisms. Due to its high electronegativity, sialic acid can promote binding effects of molecules and support the transportation of drugs and ions in cells. This also strengthens cells against degradation from glycosidases and proteases. Hence sialic acid helps glycoproteins extend their half-lives and bioactivity. On the other hand, Chinese hamster ovary (CHO) cells have been widely used as a workhorse in biopharmaceutical fields in part due to the similarity between their glycan properties and those in humans. Thus, a high sialylation produced by CHO host cell line is strongly desired. In this study, we simultaneously overexpressed two key sialylated-based enzymes human β-galactoside α(2,6) sialyltransferase I and UDP-GlcNAc 2-epimerase/ManNAc kinase to achieve greater sialylation pattern produced host cells. The single-cell line thus-generated produced an approximately 41.6% higher level of total free sialic acid, and the glycan profiles showed a significant increase of more than 7-fold in the relative amount of total sialylated N-glycan as compared to the wild-type. These results demonstrated that co-expression of these two sialylated-based key enzymes yielded a cell line that effectively produced glycoproteins with superior sialylation and achievable human-like glycoforms.
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Affiliation(s)
- Nguyen Thi Sam
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ryo Misaki
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takao Ohashi
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kazuhito Fujiyama
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
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237
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Yamamoto T, Ugai H, Nakayama-Imaohji H, Tada A, Elahi M, Houchi H, Kuwahara T. Characterization of a recombinant Bacteroides fragilis sialidase expressed in Escherichia coli. Anaerobe 2018; 50:69-75. [PMID: 29432848 DOI: 10.1016/j.anaerobe.2018.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 01/09/2018] [Accepted: 02/06/2018] [Indexed: 12/17/2022]
Abstract
The human gut commensal Bacteroides fragilis produces sialidases that remove a terminal sialic acid from host-derived polysaccharides. Sialidase is considered to be involved in B. fragilis infection pathology. A native B. fragilis sialidase has been purified and characterized, and was shown to be post-translationally modified by glycosylation. However, the biochemical properties of recombinant B. fragilis sialidase expressed in a heterologous host remain uncharacterized. In this study, we examined the enzymatic properties of the 60-kDa sialidase NanH1 of B. fragilis YCH46, which was prepared as a recombinant protein (rNanH1) in Escherichia coli. In E. coli rNanH1 was expressed as inclusion bodies, which were separated from soluble proteins to allow solubilization of insoluble rNanH1 in a buffer containing 8 M urea and renaturation in refolding buffer containing 100 mM CaCl2 and 50 mM L-arginine. The specific activity of renatured rNanH1 measured using 4-methylumberiferyl-α-D-N-acetyl neuraminic acid as a substrate was 6.16 μmol/min/mg. The optimal pH of rNanH1 ranged from 5.0 to 5.5. The specific activity of rNanH1 was enhanced in the presence of calcium ions. rNanH1 preferentially hydrolyzed the sialyl α2,8 linkage and cleaved sialic acids from mucin and serum proteins (e.g., fetuin and transferrin) but not from α1-acid glycoprotein, which is similar to the previously observed biochemical properties for a native sialidase purified from B. fragilis SBT3182. The results and methods described in this study will be useful for preparing and characterizing recombinant proteins for other B. fragilis sialidase isoenzymes.
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Affiliation(s)
- Takaaki Yamamoto
- Department of Pharmacy, Kagawa University Hospital, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Hideyo Ugai
- Department of Microbiology, Faculty of Medicine, Kagawa University, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Haruyuki Nakayama-Imaohji
- Department of Microbiology, Faculty of Medicine, Kagawa University, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Ayano Tada
- Department of Microbiology, Faculty of Medicine, Kagawa University, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Miad Elahi
- Department of Microbiology, Faculty of Medicine, Kagawa University, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Hitoshi Houchi
- Department of Pharmacy, Kagawa University Hospital, 1750-1 Miki, Kagawa, 761-0793, Japan
| | - Tomomi Kuwahara
- Department of Microbiology, Faculty of Medicine, Kagawa University, 1750-1 Miki, Kagawa, 761-0793, Japan.
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238
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Hu JB, Song GL, Liu D, Li SJ, Wu JH, Kang XQ, Qi J, Jin FY, Wang XJ, Xu XL, Ying XY, Yu L, You J, Du YZ. Sialic acid-modified solid lipid nanoparticles as vascular endothelium-targeting carriers for ischemia-reperfusion-induced acute renal injury. Drug Deliv 2018; 24:1856-1867. [PMID: 29188738 PMCID: PMC8241018 DOI: 10.1080/10717544.2017.1410258] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In an attempt to improve therapeutic efficacy of dexamethasone (DXM)-loaded solid lipid nanoparticles (NPs) for renal ischemia-reperfusion injury (IRI)-induced acute renal injury (AKI), sialic acid (SA) is used as a ligand to target the inflamed vascular endothelium. DXM-loaded SA-conjugated polyethylene glycol (PEG)ylated NPs (SA-NPs) are prepared via solvent diffusion method and show the good colloidal stability. SA-NPs reduce apoptotic human umbilical vein endothelial cells (HUVECs) via downregulating oxidative stress-induced Bax, upregulating Bcl-xL, and inhibiting Caspase-3 and Caspase-9 activation. Cellular uptake results suggest SA-NPs can be specifically internalized by the inflamed vascular endothelial cells (H2O2-pretreated HUVECs), and the mechanism is associated with the specific binding between SA and E-selectin receptor expressed on the inflamed vascular endothelial cells. Bio-distribution results further demonstrated the enhanced renal accumulation of DXM is achieved in AKI mice treated with SA-NPs, and its content is 2.70- and 5.88-fold higher than those treated with DXM and NPs at 6 h after intravenous administration, respectively. Pharmacodynamic studies demonstrate SA-NPs effectively ameliorate renal functions in AKI mice, as reflected by improved blood biochemical indexes, histopathological changes, oxidative stress levels and pro-inflammatory cytokines. Moreover, SA-NPs cause little negative effects on lymphocyte count and bone mineral density while DXM leads to severe osteoporosis. It is concluded that SA-NPs provide an efficient and targeted delivery of DXM for ischemia-reperfusion-induced injury-induced AKI, with improved therapeutic outcomes and reduced adverse effects.
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Affiliation(s)
- Jing-Bo Hu
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Gui-Ling Song
- b College of Pharmaceutical Sciences , Jiamusi University , Jiamusi , China
| | - Di Liu
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Shu-Juan Li
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China.,c College of pharmacy , Zhejiang Pharmaceutical College , Ningbo , China
| | - Jia-Hui Wu
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Xu-Qi Kang
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Jing Qi
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Fei-Yang Jin
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Xiao-Juan Wang
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Xiao-Ling Xu
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Xiao-Ying Ying
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Lian Yu
- b College of Pharmaceutical Sciences , Jiamusi University , Jiamusi , China
| | - Jian You
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Yong-Zhong Du
- a Institute of Pharmaceutics, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
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239
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Liao D, Mei H, Hu Y, Newman DK, Newman PJ. CRISPR-mediated deletion of the PECAM-1 cytoplasmic domain increases receptor lateral mobility and strengthens endothelial cell junctional integrity. Life Sci 2018; 193:186-193. [PMID: 29122551 DOI: 10.1016/j.lfs.2017.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/24/2017] [Accepted: 11/04/2017] [Indexed: 10/18/2022]
Abstract
AIMS PECAM-1 is an abundant endothelial cell surface receptor that becomes highly enriched at endothelial cell-cell junctions, where it functions to mediate leukocyte transendothelial migration, sense changes in shear and flow, and maintain the vascular permeability barrier. Homophilic interactions mediated by the PECAM-1 extracellular domain are known to be required for PECAM-1 to perform these functions; however, much less is understood about the role of its cytoplasmic domain in these processes. MAIN METHODS CRISPR/Cas9 gene editing technology was employed to generate human endothelial cell lines that either lack PECAM-1 entirely, or express mutated PECAM-1 missing the majority of its cytoplasmic domain (∆CD-PECAM-1). The endothelial barrier function was evaluated by Electric Cell-substrate Impedance Sensing, and molecular mobility was assessed by fluorescence recovery after photobleaching. KEY FINDINGS We found that ∆CD-PECAM-1 concentrates normally at endothelial cell junctions, but has the unexpected property of conferring increased baseline barrier resistance, as well as a more rapid rate of recovery of vascular integrity following thrombin-induced disruption of the endothelial barrier. Fluorescence recovery after photobleaching analysis revealed that ∆CD-PECAM-1 exhibits increased mobility within the plane of the plasma membrane, thus allowing it to redistribute more rapidly back to endothelial cell-cell borders to reform the vascular permeability barrier. SIGNIFICANCE The PECAM-1 cytoplasmic domain plays a novel role in regulating the rate and extent of vascular permeability following thrombotic or inflammatory challenge.
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Affiliation(s)
- Danying Liao
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, WI, United States; Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Heng Mei
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Debra K Newman
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, WI, United States; Department of Pharmacology, Medical College of Wisconsin, Milwaukee, United States; Department of Microbiology, Medical College of Wisconsin, Milwaukee, United States; The Cardiovascular Center, Medical College of Wisconsin, Milwaukee, United States
| | - Peter J Newman
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, WI, United States; Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, China; Department of Pharmacology, Medical College of Wisconsin, Milwaukee, United States; Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, United States; The Cardiovascular Center, Medical College of Wisconsin, Milwaukee, United States.
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240
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Abstract
Gangliosides are sialic acid containing glycosphingolipids, which are abundant in mammalian brain tissue. Several fatal human diseases are caused by defects in glycolipid metabolism. Defects in their degradation lead to an accumulation of metabolites upstream of the defective reactions, whereas defects in their biosynthesis lead to diverse problems in a large number of organs.Gangliosides are primarily positioned with their ceramide anchor in the neuronal plasma membrane and the glycan head group exposed on the cell surface. Their biosynthesis starts in the endoplasmic reticulum with the formation of the ceramide anchor, followed by sequential glycosylation reactions, mainly at the luminal surface of Golgi and TGN membranes, a combinatorial process, which is catalyzed by often promiscuous membrane-bound glycosyltransferases.Thereafter, the gangliosides are transported to the plasma membrane by exocytotic membrane flow. After endocytosis, they are degraded within the endolysosomal compartments by a complex machinery of degrading enzymes, lipid-binding activator proteins, and negatively charged lipids.
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Affiliation(s)
- Bernadette Breiden
- LIMES Institute, Membrane Biology & Lipid Biochemistry Unit, Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Bonn, Germany
| | - Konrad Sandhoff
- LIMES Institute, Membrane Biology & Lipid Biochemistry Unit, Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Bonn, Germany.
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241
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Abstract
KDN is an abbreviated name of 2-keto-3-deoxy-D-glycero-D-galacto-nononic acid, and belongs to sialic acid members like N-acetylneuraminic acid (Neu5Ac), and N-glycolylneuraminic acid (Neu5Gc). The aminoacyl group at C5 position of Neu5Ac is replaced by a hydroxyl group in KDN. Like Neu5Ac, KDN exists in various glycoconjugates including glycosphingolipids in vertebrates and gram-negative bacteria. Because of its unique properties, some methods are specifically applicable to KDN residue, although most detection methods for Neu5Ac are also applicable. In this chapter, methods for identification of KDN residues in glycosphingolipids are described, focusing on two methods that are often used, i.e., the fluorescent HPLC analysis and the TLC immunostaining with the antibodies specific to α2,3- and α2,8-KDN residues.
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Affiliation(s)
- Ken Kitajima
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, Japan.
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242
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Katorcha E, Baskakov IV. Analysis of Covalent Modifications of Amyloidogenic Proteins Using Two-Dimensional Electrophoresis: Prion Protein and Its Sialylation. Methods Mol Biol 2018; 1779:241-255. [PMID: 29886537 DOI: 10.1007/978-1-4939-7816-8_15] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A number of proteins associated with neurodegenerative disease undergo several types of posttranslational modifications. They include N-linked glycosylation of the prion protein and amyloid precursor protein, phosphorylation of tau and α-synuclein. Posttranslational modifications alter physical properties of proteins including their net and surface charges, affecting their processing, life-time and propensity to acquire misfolded, disease-associated states. As such, analysis of posttranslational modifications is important for understanding the mechanisms of pathogenesis. Recent studies documented that sialylation of the disease-associated form of the prion protein or PrPSc controls the fate of prions in an organism and outcomes of prion infection. For assessing sialylation status of PrPSc, we developed a reliable protocol that involves two-dimensional electrophoresis followed by Western blot (2D). The current chapter describes the procedure for the analysis of sialylation status of PrPSc from various sources including central nervous system, secondary lymphoid organs, cultured cells, or PrPSc produced in Protein Misfolding Cyclic Amplification.
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Affiliation(s)
- Elizaveta Katorcha
- Department of Anatomy and Neurobiology, Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Ilia V Baskakov
- Department of Anatomy and Neurobiology, Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD, USA.
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243
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Abstract
Investigations of methodologies aimed on improving the stereoselective synthesis of sialosides and the efficient assembly of sialic acid glycoconjugates has been the mission of dedicated research groups from the late 1960s. This review presents major accomplishments in the field, with the emphasis on significant breakthroughs and influential synthetic strategies of the last decade.
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244
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North RA, Horne CR, Davies JS, Remus DM, Muscroft-Taylor AC, Goyal P, Wahlgren WY, Ramaswamy S, Friemann R, Dobson RCJ. "Just a spoonful of sugar...": import of sialic acid across bacterial cell membranes. Biophys Rev 2017; 10:219-227. [PMID: 29222808 DOI: 10.1007/s12551-017-0343-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/13/2017] [Indexed: 12/24/2022] Open
Abstract
Eukaryotic cell surfaces are decorated with a complex array of glycoconjugates that are usually capped with sialic acids, a large family of over 50 structurally distinct nine-carbon amino sugars, the most common member of which is N-acetylneuraminic acid. Once made available through the action of neuraminidases, bacterial pathogens and commensals utilise host-derived sialic acid by degrading it for energy or repurposing the sialic acid onto their own cell surface to camouflage the bacterium from the immune system. A functional sialic acid transporter has been shown to be essential for the uptake of sialic acid in a range of human bacterial pathogens and important for host colonisation and persistence. Here, we review the state-of-play in the field with respect to the molecular mechanisms by which these bio-nanomachines transport sialic acids across bacterial cell membranes.
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Affiliation(s)
- Rachel A North
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand
| | - Christopher R Horne
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand
| | - James S Davies
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand
| | - Daniela M Remus
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand
| | - Andrew C Muscroft-Taylor
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand
| | - Parveen Goyal
- Department of Chemistry and Molecular Biology, Biochemistry and Structural Biology, University of Gothenburg, Box 462, 40530, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe) at University of Gothenburg, Box 440, 40530, Gothenburg, Sweden
| | - Weixiao Yuan Wahlgren
- Department of Chemistry and Molecular Biology, Biochemistry and Structural Biology, University of Gothenburg, Box 462, 40530, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe) at University of Gothenburg, Box 440, 40530, Gothenburg, Sweden
| | - S Ramaswamy
- The Institute for Stem Cell Biology and Regenerative Medicine (InStem), G.K.V.K. Post Office, Bangalore, Karnataka, 560065, India
| | - Rosmarie Friemann
- Department of Chemistry and Molecular Biology, Biochemistry and Structural Biology, University of Gothenburg, Box 462, 40530, Gothenburg, Sweden. .,Centre for Antibiotic Resistance Research (CARe) at University of Gothenburg, Box 440, 40530, Gothenburg, Sweden.
| | - Renwick C J Dobson
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, P.O. Box 4800, Christchurch, 8140, New Zealand. .,Bio21 Molecular Science and Biotechnology Institute, Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria, 3010, Australia.
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245
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Barroso A, Giménez E, Konijnenberg A, Sancho J, Sanz-Nebot V, Sobott F. Evaluation of ion mobility for the separation of glycoconjugate isomers due to different types of sialic acid linkage, at the intact glycoprotein, glycopeptide and glycan level. J Proteomics 2017; 173:22-31. [PMID: 29197583 DOI: 10.1016/j.jprot.2017.11.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 11/23/2017] [Accepted: 11/24/2017] [Indexed: 02/07/2023]
Abstract
The study of protein glycosylation can be regarded as an intricate but very important task, making glycomics one of the most challenging and interesting, albeit under-researched, type of "omics" science. Complexity escalates remarkably when considering that carbohydrates can form severely branched structures with many different constituents, which often leads to the formation of multiple isomers. In this regard, ion mobility (IM) spectrometry has recently demonstrated its power for the separation of isomeric compounds. In the present work, the potential of traveling wave IM (TWIMS) for the separation of isomeric glycoconjugates was evaluated, using mouse transferrin (mTf) as model glycoprotein. Particularly, we aim to assess the performance of this platform for the separation of isomeric glycoconjugates due to the type of sialic acid linkage, at the intact glycoprotein, glycopeptide and glycan level. Straightforward separation of isomers was achieved with the analysis of released glycans, as opposed to the glycopeptides which showed a more complex pattern. Finally, the developed methodology was applied to serum samples of mice, to investigate its robustness when analyzing real complex samples. BIOLOGICAL SIGNIFICANCE Ion mobility mass spectrometry is a promising analytical technique for the separation of glycoconjugate isomers due to type of sialic acid linkage. The impact of such a small modification in the glycan structure is more evident in smaller analytes, reason why the analysis of free glycans was easier compared to the intact protein or the glycopeptides. The established methodology could be regarded as starting point in the separation of highly decorated glycoconjugates. This is an important topic nowadays, as differences in the abundance of some glycan isomers could be the key for the early diagnosis, control or differentiation of certain diseases, such as inflammation or cancer.
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Affiliation(s)
- Albert Barroso
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Estela Giménez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Diagonal 645, 08028 Barcelona, Spain.
| | - Albert Konijnenberg
- Biomolecular & Analytical Mass Spectrometry Group, Department of Chemistry, University of Antwerp, Antwerp, Belgium
| | - Jaime Sancho
- Instituto de Parasitología y Biomedicina "López-Neyra" (IPBLN), CSIC, Armilla, Granada, Spain
| | - Victoria Sanz-Nebot
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Frank Sobott
- Biomolecular & Analytical Mass Spectrometry Group, Department of Chemistry, University of Antwerp, Antwerp, Belgium; Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom; School of Molecular and Cellular Biology, University of Leeds, LS2 9JT, United Kingdom.
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246
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Hayakawa T, Khedri Z, Schwarz F, Landig C, Liang SY, Yu H, Chen X, Fujito NT, Satta Y, Varki A, Angata T. Coevolution of Siglec-11 and Siglec-16 via gene conversion in primates. BMC Evol Biol 2017; 17:228. [PMID: 29169316 PMCID: PMC5701461 DOI: 10.1186/s12862-017-1075-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/15/2017] [Indexed: 02/08/2023] Open
Abstract
Background Siglecs-11 and -16 are members of the sialic acid recognizing Ig-like lectin family, and expressed in same cells. Siglec-11 functions as an inhibitory receptor, whereas Siglec-16 exhibits activating properties. In humans, SIGLEC11 and SIGLEC16 gene sequences are extremely similar in the region encoding the extracellular domain due to gene conversions. Human SIGLEC11 was converted by the nonfunctional SIGLEC16P allele, and the converted SIGLEC11 allele became fixed in humans, possibly because it provides novel neuroprotective functions in brain microglia. However, the detailed evolutionary history of SIGLEC11 and SIGLEC16 in other primates remains unclear. Results We analyzed SIGLEC11 and SIGLEC16 gene sequences of multiple primate species, and examined glycan binding profiles of these Siglecs. The phylogenetic tree demonstrated that gene conversions between SIGLEC11 and SIGLEC16 occurred in the region including the exon encoding the sialic acid binding domain in every primate examined. Functional assays showed that glycan binding preference is similar between Siglec-11 and Siglec-16 in all analyzed hominid species. Taken together with the fact that Siglec-11 and Siglec-16 are expressed in the same cells, Siglec-11 and Siglec-16 are regarded as paired receptors that have maintained similar ligand binding preferences via gene conversions. Relaxed functional constraints were detected on the SIGLEC11 and SIGLEC16 exons that underwent gene conversions, possibly contributing to the evolutionary acceptance of repeated gene conversions. The frequency of nonfunctional SIGLEC16P alleles is much higher than that of SIGLEC16 alleles in every human population. Conclusions Our findings indicate that Siglec-11 and Siglec-16 have been maintained as paired receptors by repeated gene conversions under relaxed functional constraints in the primate lineage. The high prevalence of the nonfunctional SIGLEC16P allele and the fixation of the converted SIGLEC11 imply that the loss of Siglec-16 and the gain of Siglec-11 in microglia might have been favored during the evolution of human lineage. Electronic supplementary material The online version of this article (10.1186/s12862-017-1075-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Toshiyuki Hayakawa
- Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
| | - Zahra Khedri
- Departments of Medicine and Cellular & Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, La Jolla, CA, USA
| | - Flavio Schwarz
- Departments of Medicine and Cellular & Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, La Jolla, CA, USA
| | - Corinna Landig
- Departments of Medicine and Cellular & Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, La Jolla, CA, USA
| | - Suh-Yuen Liang
- Institute of Biological Chemistry, Academia Sinica, 128 Section 2, Academia Road, Nangang District, Taipei, 11529, Taiwan
| | - Hai Yu
- Department of Chemistry, University of California at Davis, Davis, CA, USA
| | - Xi Chen
- Department of Chemistry, University of California at Davis, Davis, CA, USA
| | - Naoko T Fujito
- Department of Evolutionary Studies of Biosystems, SOKENDAI (Graduate University for Advanced Studies), Hayama, Kanagawa, Japan
| | - Yoko Satta
- Department of Evolutionary Studies of Biosystems, SOKENDAI (Graduate University for Advanced Studies), Hayama, Kanagawa, Japan
| | - Ajit Varki
- Departments of Medicine and Cellular & Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, La Jolla, CA, USA
| | - Takashi Angata
- Institute of Biological Chemistry, Academia Sinica, 128 Section 2, Academia Road, Nangang District, Taipei, 11529, Taiwan.
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247
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Abstract
Viruses are constantly engaged in a molecular arms race with the host, where efficient and tactical use of cellular receptors benefits critical steps in infection. Receptor use dictates initiation, establishment, and spread of viral infection to new tissues and hosts. Mammalian orthoreoviruses (reoviruses) are pervasive pathogens that use multiple receptors to overcome protective host barriers to disseminate from sites of initial infection and cause disease in young mammals. In particular, reovirus invades the central nervous system (CNS) with serotype-dependent tropism and disease. A single viral gene, encoding the attachment protein σ1, segregates with distinct patterns of CNS injury. Despite the identification and characterization of several reovirus receptors, host factors that dictate tropism via interaction with σ1 remain undefined. Here, we summarize the state of the reovirus receptor field and discuss open questions toward understanding how the reovirus attachment protein dictates CNS tropism.
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Affiliation(s)
| | | | - Terence S Dermody
- University of Pittsburgh School of Medicine, Pittsburgh, PA, United States.
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248
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Yang X, Liang S, Wang L, Han P, Jiang X, Wang J, Hao Y, Wu L. Sialic acid and anti-ganglioside antibody levels in children with autism spectrum disorders. Brain Res 2017; 1678:273-277. [PMID: 29102779 DOI: 10.1016/j.brainres.2017.10.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/24/2017] [Accepted: 10/26/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Autism spectrum disorders (ASD) may result from a combination of genetic and environmental factors, and impact neurological functions and behaviors. Sialic acid (SA) is an indispensable nutrient for early brain development, and its polymer polySia (PSA) can modify neural cell adhesion molecules (NCAM), thereby indirectly mediating neuronal outgrowth, synaptic connectivity and memory formation. To investigate the association between SA and ASD, we conducted a case-control study. METHODS The study sample included 82 autistic children and 60 healthy children. We measured the levels of plasma SA and serum anti-gangliosides M1 antibodies (anti-GM1 antibodies) in the ASD and control groups. We also examined the severity of autistic children. RESULTS The level of plasma SA in the control group was significantly higher than that in the ASD group (p < .01). Autistic children had higher positive rates of anti-GM1 antibodies (37.8%) than controls (21.67%, P = .04). However, there was no correlation between autistic severity and the levels of SA. SA may be as a biomarker for diagnosis of ASD with a positive predictive value of 84.42%, a negative predictive value of 73.85% and an area under the ROC curve value of 0.858. CONCLUSIONS These results indicate that SA and anti-GM1 antibodies are associated with ASD. Our data suggested that future studies to explore the function of SA in the etiology of ASD may be needed.
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Affiliation(s)
- Xiaolei Yang
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China
| | - Shuang Liang
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China
| | - Lin Wang
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China
| | - Panpan Han
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China
| | - Xitao Jiang
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China
| | - Jianli Wang
- Institute of Mental Health Research, University of Ottawa, Ottawa, Canada
| | - Yanqiu Hao
- Department of Pediatrics, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, China.
| | - Lijie Wu
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, No.157 Baojian Road, Harbin 150081, China.
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249
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Albrecht S, Mittermayr S, Smith J, Martín SM, Doherty M, Bones J. Twoplex 12/13 C 6 aniline stable isotope and linkage-specific sialic acid labeling 2D-LC-MS workflow for quantitative N-glycomics. Proteomics 2017; 17. [PMID: 27891772 DOI: 10.1002/pmic.201600304] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/10/2016] [Accepted: 11/25/2016] [Indexed: 11/06/2022]
Abstract
Quantitative glycomics represents an actively expanding research field ranging from the discovery of disease-associated glycan alterations to the quantitative characterization of N-glycans on therapeutic proteins. Commonly used analytical platforms for comparative relative quantitation of complex glycan samples include MALDI-TOF-MS or chromatographic glycan profiling with subsequent data alignment and statistical evaluation. Limitations of such approaches include run-to-run technical variation and the potential introduction of subjectivity during data processing. Here, we introduce an offline 2D LC-MSE workflow for the fractionation and relative quantitation of twoplex isotopically labeled N-linked oligosaccharides using neutral 12 C6 and 13 C6 aniline (Δmass = 6 Da). Additional linkage-specific derivatization of sialic acids using 4-(4,6-dimethoxy-1,3,5-trizain-2-yl)-4-methylmorpholinium chloride offered simultaneous and advanced in-depth structural characterization. The potential of the method was demonstrated for the differential analysis of structurally defined N-glycans released from serum proteins of patients diagnosed with various stages of colorectal cancer. The described twoplex 12 C6 /13 C6 aniline 2D LC-MS platform is ideally suited for differential glycomic analysis of structurally complex N-glycan pools due to combination and analysis of samples in a single LC-MS injection and the associated minimization in technical variation.
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Affiliation(s)
- Simone Albrecht
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland
| | - Stefan Mittermayr
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland
| | - Josh Smith
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland
| | - Silvia Millán Martín
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland
| | - Margaret Doherty
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland.,Department of Life Sciences, School of Science, Institute of Technology Sligo, Sligo, Ireland
| | - Jonathan Bones
- Characterisation and Comparability Laboratory, NIBRT - The National Institute for Bioprocessing Research and Training, Dublin, Ireland
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250
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Tsuji M, Sriwilaijaroen N, Inoue H, Miki K, Kinoshita K, Koyama K, Furuhata K, Suzuki Y, Takahashi K. Synthesis and anti-influenza virus evaluation of triterpene- sialic acid conjugates. Bioorg Med Chem 2017; 26:17-24. [PMID: 29198893 DOI: 10.1016/j.bmc.2017.09.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/22/2017] [Accepted: 09/26/2017] [Indexed: 12/26/2022]
Abstract
We are interested in new non-natural glycosides with sialic acid conjugates and their biological activities. We report the synthesis of eleven non-natural occurring glycosides, which are triterpene (glycyrrhetinic acid and its derivatives)-sialic acid conjugates, and their inhibitory activities against influenza virus sialidases and influenza virus multiplication in MDCK host cells. Deoxoglycyrrhetol-sialic acid conjugates (6d and 6e) and oleanolic acid-sialic acid conjugates (7d and 7e) showed strong inhibitory activities against three subtypes of influenza virus sialidases. These four compounds (6d, 6e, 7d and 7e) showed clear inhibition to influenza virus multiplication but not to MDCK host cell survival.
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Affiliation(s)
- Mitsuru Tsuji
- Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
| | - Nongluk Sriwilaijaroen
- Faculty of Medicine, Thammasat University (Rangsit Campus), Pathumthani 12120, Thailand; College of Life and Health Sciences, Chubu University, Kasugai, Aichi 487-8501, Japan
| | - Hideo Inoue
- Minophagen Research Laboratory, Komatsubara 2-2-3, Zama-shi, Kanagawa Pref. 252-0002, Japan
| | - Kazuhiko Miki
- Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
| | - Kaoru Kinoshita
- Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
| | - Kiyotaka Koyama
- Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan
| | - Kimio Furuhata
- School of Pharmacy, Kitasato University, Shirokane 5-9-1, Minato-ku, Tokyo 108-8641, Japan
| | - Yasuo Suzuki
- College of Life and Health Sciences, Chubu University, Kasugai, Aichi 487-8501, Japan
| | - Kunio Takahashi
- Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan.
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