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Kang Y, Zhang Q, Xu S, Yu Y. The alteration and role of glycoconjugates in Alzheimer's disease. Front Aging Neurosci 2024; 16:1398641. [PMID: 38946780 PMCID: PMC11212478 DOI: 10.3389/fnagi.2024.1398641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 05/31/2024] [Indexed: 07/02/2024] Open
Abstract
Alzheimer's disease (AD) is a prevalent neurodegenerative disorder characterized by abnormal protein deposition. With an alarming 30 million people affected worldwide, AD poses a significant public health concern. While inhibiting key enzymes such as β-site amyloid precursor protein-cleaving enzyme 1 and γ-secretase or enhancing amyloid-β clearance, has been considered the reasonable strategy for AD treatment, their efficacy has been compromised by ineffectiveness. Furthermore, our understanding of AD pathogenesis remains incomplete. Normal aging is associated with a decline in glucose uptake in the brain, a process exacerbated in patients with AD, leading to significant impairment of a critical post-translational modification: glycosylation. Glycosylation, a finely regulated mechanism of intracellular secondary protein processing, plays a pivotal role in regulating essential functions such as synaptogenesis, neurogenesis, axon guidance, as well as learning and memory within the central nervous system. Advanced glycomic analysis has unveiled that abnormal glycosylation of key AD-related proteins closely correlates with the onset and progression of the disease. In this context, we aimed to delve into the intricate role and underlying mechanisms of glycosylation in the etiopathology and pathogenesis of AD. By highlighting the potential of targeting glycosylation as a promising and alternative therapeutic avenue for managing AD, we strive to contribute to the advancement of treatment strategies for this debilitating condition.
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Affiliation(s)
- Yue Kang
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Qian Zhang
- Department of Pharmacology, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Silu Xu
- Department of Pharmacy, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yue Yu
- School of Pharmacy, Fujian Medical University, Fuzhou, Fujian, China
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Xu T, Heon-Roberts R, Moore T, Dubot P, Pan X, Guo T, Cairo CW, Holley R, Bigger B, Durcan TM, Levade T, Ausseil J, Amilhon B, Gorelik A, Nagar B, Sturiale L, Palmigiano A, Röckle I, Thiesler H, Hildebrandt H, Garozzo D, Pshezhetsky AV. Secondary deficiency of neuraminidase 1 contributes to CNS pathology in neurological mucopolysaccharidoses via hypersialylation of brain glycoproteins. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.26.587986. [PMID: 38712143 PMCID: PMC11071461 DOI: 10.1101/2024.04.26.587986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Mucopolysaccharidoses (MPS) are lysosomal storage diseases caused by defects in catabolism of glycosaminoglycans. MPS I, II, III and VII are associated with lysosomal accumulation of heparan sulphate and manifest with neurological deterioration. Most of these neurological MPS currently lack effective treatments. Here, we report that, compared to controls, neuraminidase 1 (NEU1) activity is drastically reduced in brain tissues of neurological MPS patients and in mouse models of MPS I, II, IIIA, IIIB and IIIC, but not of other neurological lysosomal disorders not presenting with heparan sulphate storage. We further show that accumulated heparan sulphate disrupts the lysosomal multienzyme complex of NEU1 with cathepsin A (CTSA), β-galactosidase (GLB1) and glucosamine-6-sulfate sulfatase (GALNS) necessary to maintain enzyme activity, and that NEU1 deficiency is linked to partial deficiencies of GLB1 and GALNS in cortical tissues and iPSC-derived cortical neurons of neurological MPS patients. Increased sialylation of N-linked glycans in brain samples of human MPS III patients and MPS IIIC mice implicated insufficient processing of brain N-linked sialylated glycans, except for polysialic acid, which was reduced in the brains of MPS IIIC mice. Correction of NEU1 activity in MPS IIIC mice by lentiviral gene transfer ameliorated previously identified hallmarks of the disease, including memory impairment, behavioural traits, and reduced levels of the excitatory synapse markers VGLUT1 and PSD95. Overexpression of NEU1 also restored levels of VGLUT1-/PSD95-positive puncta in cortical neurons derived from iPSC of an MPS IIIA patient. Together, our data demonstrate that heparan sulphate-induced secondary NEU1 deficiency and aberrant sialylation of glycoproteins implicated in synaptogenesis, memory, and behaviour constitute a novel pathological pathway in neurological MPS spectrum crucially contributing to CNS pathology. Graphical abstract
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Suzuki T. Role of Glycoconjugates and Mammalian Sialidases Involved in Viral Infection and Neural Function. YAKUGAKU ZASSHI 2022; 142:381-388. [DOI: 10.1248/yakushi.21-00212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Takashi Suzuki
- School of Pharmaceutical Sciences, University of Shizuoka
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4
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Bourguet E, Figurska S, Fra Czek MM. Human Neuraminidases: Structures and Stereoselective Inhibitors. J Med Chem 2022; 65:3002-3025. [PMID: 35170942 DOI: 10.1021/acs.jmedchem.1c01612] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This Perspective describes the classification, structures, substrates, mechanisms of action, and implications of human neuraminidases (hNEUs) in various pathologies. Some inhibitors have been developed for each isoform, leading to more precise interactions with hNEUs. Although crystal structure data are available for NEU2, most of the findings are based on NEU1 inhibition, and limited information is available for other hNEUs. Therefore, the synthesis of new compounds would facilitate the enrichment of the arsenal of inhibitors to better understand the roles of hNEUs and their mechanisms of action. Nevertheless, due to the already known inhibitors of human neuraminidase enzymes, a structure-activity relationship is presented along with different approaches to inhibit these enzymes for the development of potent and selective inhibitors. Among the different emerging strategies, one is the inhibition of the dimerization of NEU1 or NEU3, and the second is the inhibition of certain receptors located close to hNEU.
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Affiliation(s)
- Erika Bourguet
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, 51097 Reims, France
| | - Sylwia Figurska
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, 51097 Reims, France.,Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland
| | - Manuela Maria Fra Czek
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), CNRS UMR 7312, 51097 Reims, France.,Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland
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Yuan M, Zhu H, Li Y, Ge F, Lui S, Gong Q, Qiu C, Song H, Zhang W. The DRD2 Taq1A polymorphism moderates the effect of PTSD symptom severity on the left hippocampal CA3 volume: a pilot study. Psychopharmacology (Berl) 2022; 239:3431-3438. [PMID: 34086098 PMCID: PMC9585014 DOI: 10.1007/s00213-021-05882-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 05/21/2021] [Indexed: 02/08/2023]
Abstract
RATIONALE AND OBJECTIVES The hippocampus, especially the CA1, CA3, and dentate gyrus (DG) subfields, is reported to be associated with post-traumatic stress disorder (PTSD) after trauma. However, neuroimaging studies of the associations between PTSD and hippocampal subfield volumes have failed to yield consistent findings. The aim of this study is to examine whether the dopamine D2 receptor (DRD2) Taq1A polymorphism, which is associated with both hippocampal function and PTSD, moderated the association between PTSD severity and hippocampal CA1, CA3 and DG volumes. METHODS T1-weighted images were acquired from 142 trauma survivors from the 2008 Wenchuan earthquake using a 3.0-T magnetic resonance imaging system. Hippocampal subfield segmentations were performed with FreeSurfer v6.0. We used the simple moderation model from the PROCESS v3.4 tool for SPSS 23.0 to examine the association between the rs1800497 polymorphism, PTSD severity, and hippocampal CA3 and DG volumes. RESULTS A significant genotype × PTSD symptom severity interaction was found for the left CA3 volume (ΔF = 5.01, p = 0.008, ΔR2 = 0.05). Post hoc, exploratory analyses deconstructing the interaction revealed that severe PTSD symptomatology were associated with reduced left CA3 volume among TC heterozygotes (t = - 2.86, p = 0.005). CONCLUSIONS This study suggests that DRD2 Taq1A polymorphism moderates the association between PTSD symptomatology and left CA3 volume, which promotes an etiological understanding of the hippocampal atrophy at the subfield level. This highlights the complex effect of environmental stress, and provides possible mechanism for the relationship between the dopaminergic system and hippocampal function in PTSD.
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Affiliation(s)
- Minlan Yuan
- grid.412901.f0000 0004 1770 1022Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041 Chengdu, China ,grid.412901.f0000 0004 1770 1022Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Hongru Zhu
- grid.412901.f0000 0004 1770 1022Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041 Chengdu, China ,grid.412901.f0000 0004 1770 1022Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Yuchen Li
- grid.412901.f0000 0004 1770 1022Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041 Chengdu, China ,grid.412901.f0000 0004 1770 1022Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Fenfen Ge
- grid.412901.f0000 0004 1770 1022Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041 Chengdu, China ,grid.412901.f0000 0004 1770 1022Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Su Lui
- grid.412901.f0000 0004 1770 1022Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan China ,grid.268099.c0000 0001 0348 3990Radiology Department of the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Qiyong Gong
- grid.412901.f0000 0004 1770 1022Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, Sichuan China
| | - Changjian Qiu
- grid.412901.f0000 0004 1770 1022Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041 Chengdu, China ,grid.412901.f0000 0004 1770 1022Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Huan Song
- West China Biomedical Big Data Center, West China Hospital, Sichuan University, 610041, Chengdu, China. .,Medical Big Data Center, Sichuan University, Chengdu, 610041, China.
| | - Wei Zhang
- Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, 610041, Chengdu, China. .,Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China. .,West China Biomedical Big Data Center, West China Hospital, Sichuan University, 610041, Chengdu, China. .,Medical Big Data Center, Sichuan University, Chengdu, 610041, China.
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Zhi WJ, Qiao SM, Zou Y, Peng RY, Yan HT, Ma LZ, Dong J, Zhao L, Yao BW, Zhao XL, Feng XX, Hu XJ, Wang LF. Low p-SYN1 (Ser-553) Expression Leads to Abnormal Neurotransmitter Release of GABA Induced by Up-Regulated Cdk5 after Microwave Exposure: Insights on Protection and Treatment of Microwave-Induced Cognitive Dysfunction. Curr Issues Mol Biol 2021; 44:206-221. [PMID: 35723394 PMCID: PMC8929049 DOI: 10.3390/cimb44010015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 11/23/2022] Open
Abstract
With the wide application of microwave technology, concerns about its health impact have arisen. The signal transmission mode of the central nervous system and neurons make it particularly sensitive to electromagnetic exposure. It has been reported that abnormal release of amino acid neurotransmitters is mediated by alteration of p-SYN1 after microwave exposure, which results in cognitive dysfunction. As the phosphorylation of SYN1 is regulated by different kinases, in this study we explored the regulatory mechanisms of SYN1 fluctuations following microwave exposure and its subsequent effect on GABA release, aiming to provide clues on the mechanism of cognitive impairment caused by microwave exposure. In vivo studies with Timm and H&E staining were adopted and the results showed abnormality in synapse formation and neuronal structure, explaining the previously-described deficiency in cognitive ability caused by microwave exposure. The observed alterations in SYN1 level, combined with the results of earlier studies, indicate that SYN1 and its phosphorylation status (ser-553 and ser62/67) may play a role in the abnormal release of neurotransmitters. Thus, the role of Cdk5, the upstream kinase regulating the formation of p-SYN1 (ser-553), as well as that of MEK, the regulator of p-SYN1 (ser-62/67), were investigated both in vivo and in vitro. The results showed that Cdk5 was a negative regulator of p-SYN1 (ser-553) and that its up-regulation caused a decrease in GABA release by reducing p-SYN1 (ser-553). While further exploration still needed to elaborate the role of p-SYN1 (ser-62/67) for neurotransmitter release, MEK inhibition had was no impact on p-Erk or p-SYN1 (ser-62/67) after microwave exposure. In conclusion, the decrease of p-SYN1 (ser-553) may result in abnormalities in vesicular anchoring and GABA release, which is caused by increased Cdk5 regulated through Calpain-p25 pathway after 30 mW/cm2 microwave exposure. This study provided a potential new strategy for the prevention and treatment of microwave-induced cognitive dysfunction.
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Affiliation(s)
- Wei-Jia Zhi
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Si-Mo Qiao
- Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing 100850, China; (S.-M.Q.); (H.-T.Y.)
| | - Yong Zou
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Rui-Yun Peng
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Hai-Tao Yan
- Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing 100850, China; (S.-M.Q.); (H.-T.Y.)
| | - Li-Zhen Ma
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Ji Dong
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Li Zhao
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Bin-Wei Yao
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Xue-Long Zhao
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
| | - Xin-Xing Feng
- Endocrine and Cardiovascular Center, Cardiovascular Institute and Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing 100850, China;
| | - Xiang-Jun Hu
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
- Correspondence: (X.-J.H.); (L.-F.W.)
| | - Li-Feng Wang
- Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China; (W.-J.Z.); (Y.Z.); (R.-Y.P.); (L.-Z.M.); (J.D.); (L.Z.); (B.-W.Y.); (X.-L.Z.)
- Correspondence: (X.-J.H.); (L.-F.W.)
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7
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Sialidase neu4 deficiency is associated with neuroinflammation in mice. Glycoconj J 2021; 38:649-667. [PMID: 34686927 DOI: 10.1007/s10719-021-10017-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/11/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022]
Abstract
Sialidases catalyze the removal of sialic acid residues from glycoproteins, oligosaccharides, and sialylated glycolipids. Sialidase Neu4 is in the lysosome and has broad substrate specificity. Previously generated Neu4-/- mice were viable, fertile and lacked gross morphological abnormalities, but displayed a marked vacuolization and lysosomal storage in lung and spleen cells. In addition, we showed that there is an increased level of GD1a ganglioside and a markedly decreased level of GM1 ganglioside in the brain of Neu4-/- mice. In this study, we further explored whether sialidase Neu4 deficiency causes neuroinflammation. We demostrated that elevated level of GD1a and GT1b is associated with an increased level of LAMP1-positive lysosomal vesicles and Tunel-positive neurons correlated with alterations in the expression of cytokines and chemokines in adult Neu4-/- mice. Astrogliosis and microgliosis were also significantly enhanced in the hippocampus, and cerebellum. These changes in brain immunity were accompanied by motor impairment in these mice. Our results indicate that sialidase Neu4 is a novel mediator of an inflammatory response in the mouse brain due to the altered catabolism of gangliosides.
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8
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Niedzwiedz-Massey VM, Douglas JC, Rafferty T, Wight PA, Kane CJM, Drew PD. Ethanol modulation of hippocampal neuroinflammation, myelination, and neurodevelopment in a postnatal mouse model of fetal alcohol spectrum disorders. Neurotoxicol Teratol 2021; 87:107015. [PMID: 34256161 PMCID: PMC8440486 DOI: 10.1016/j.ntt.2021.107015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/24/2021] [Accepted: 07/08/2021] [Indexed: 01/15/2023]
Abstract
Fetal alcohol spectrum disorders (FASD) are alarmingly common and result in significant personal and societal loss. Neuropathology of the hippocampus is common in FASD leading to aberrant cognitive function. In the current study, we evaluated the effects of ethanol on the expression of a targeted set of molecules involved in neuroinflammation, myelination, neurotransmission, and neuron function in the developing hippocampus in a postnatal model of FASD. Mice were treated with ethanol from P4-P9, hippocampi were isolated 24 h after the final treatment at P10, and mRNA levels were quantitated by qRT-PCR. We evaluated the effects of ethanol on both pro-inflammatory and anti-inflammatory molecules in the hippocampus and identified novel mechanisms by which ethanol induces neuroinflammation. We further demonstrated that ethanol decreased expression of molecules associated with mature oligodendrocytes and greatly diminished expression of a lacZ reporter driven by the first half of the myelin proteolipid protein (PLP) gene (PLP1). In addition, ethanol caused a decrease in genes expressed in oligodendrocyte progenitor cells (OPCs). Together, these studies suggest ethanol may modulate pathogenesis in the developing hippocampus through effects on cells of the oligodendrocyte lineage, resulting in altered oligodendrogenesis and myelination. We also observed differential expression of molecules important in synaptic plasticity, neurogenesis, and neurotransmission. Collectively, the molecules evaluated in these studies may play a role in ethanol-induced pathology in the developing hippocampus and contribute to cognitive impairment associated with FASD. A better understanding of these molecules and their effects on the developing hippocampus may lead to novel treatment strategies for FASD.
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Affiliation(s)
- Victoria M Niedzwiedz-Massey
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - James C Douglas
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Tonya Rafferty
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Patricia A Wight
- Department of Physiology and Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Cynthia J M Kane
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Paul D Drew
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA; Department of Neurology, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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9
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The Function of Sialidase Revealed by Sialidase Activity Imaging Probe. Int J Mol Sci 2021; 22:ijms22063187. [PMID: 33804798 PMCID: PMC8003999 DOI: 10.3390/ijms22063187] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 11/17/2022] Open
Abstract
Sialidase cleaves sialic acid residues from glycans such as glycoproteins and glycolipids. In the brain, desorption of the sialic acid by sialidase is essential for synaptic plasticity, learning and memory and synaptic transmission. BTP3-Neu5Ac has been developed for sensitive imaging of sialidase enzyme activity in mammalian tissues. Sialidase activity in the rat hippocampus detected with BTP3-Neu5Ac increases rapidly by neuronal depolarization. It is presumed that an increased sialidase activity in conjunction with neural excitation is involved in the formation of the neural circuit for memory. Since sialidase inhibits the exocytosis of the excitatory neurotransmitter glutamate, the increased sialidase activity by neural excitation might play a role in the negative feedback mechanism against the glutamate release. Mammalian tissues other than the brain have also been stained with BTP3-Neu5Ac. On the basis of information on the sialidase activity imaging in the pancreas, it was found that sialidase inhibitor can be used as an anti-diabetic drug that can avoid hypoglycemia, a serious side effect of insulin secretagogues. In this review, we discuss the role of sialidase in the brain as well as in the pancreas and skin, as revealed by using a sialidase activity imaging probe. We also present the detection of influenza virus with BTP3-Neu5Ac and modification of BTP3-Neu5Ac.
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Minami A, Fujita Y, Goto J, Iuchi A, Fujita K, Mikami Y, Shiratori M, Ishii A, Mitragotri S, Iwao Y, Kanazawa H, Kurebayashi Y, Takahashi T, Otsubo T, Ikeda K, Suzuki T. Enhancement of elastin expression by transdermal administration of sialidase isozyme Neu2. Sci Rep 2021; 11:3302. [PMID: 33558588 PMCID: PMC7870814 DOI: 10.1038/s41598-021-82820-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/14/2021] [Indexed: 12/19/2022] Open
Abstract
Reduction of elastin in the skin causes various skin diseases as well as wrinkles and sagging with aging. Sialidase is a hydrolase that cleaves a sialic acid residue from sialoglycoconjugate. Cleavage of sialic acid from microfibrils by the sialidase isozyme Neu1 facilitates elastic fiber assembly. In the present study, we showed that a lower layer of the dermis and muscle showed relatively intense sialidase activity. The sialidase activity in the skin decreased with aging. Choline and geranate (CAGE), one of the ionic liquids, can deliver the sialidase subcutaneously while maintaining the enzymatic activity. The elastin level in the dermis was increased by applying sialidase from Arthrobacter ureafaciens (AUSA) with CAGE on the skin for 5 days in rats and senescence-accelerated mice prone 1 and 8. Sialidase activity in the dermis was considered to be mainly due to Neu2 based on the expression level of sialidase isozyme mRNA. Transdermal administration of Neu2 with CAGE also increased the level of elastin in the dermis. Therefore, not only Neu1 but also Neu2 would be involved in elastic fiber assembly. Transdermal administration of sialidase is expected to be useful for improvement of wrinkles and skin disorders due to the loss of elastic fibers.
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Affiliation(s)
- Akira Minami
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan.
| | - Yuka Fujita
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Jun Goto
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Ayano Iuchi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Kosei Fujita
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Yasuyo Mikami
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Mako Shiratori
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Ami Ishii
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Samir Mitragotri
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Yasunori Iwao
- Laboratory of Synthetic Organic and Medicinal Chemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Hiroaki Kanazawa
- Department of Functional Anatomy, School of Nursing, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Yuuki Kurebayashi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Tadanobu Takahashi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Tadamune Otsubo
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, Hiroshima, 737-0112, Japan
| | - Kiyoshi Ikeda
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, Hiroshima, 737-0112, Japan
| | - Takashi Suzuki
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan.
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11
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Limón ID, Angulo-Cruz I, Sánchez-Abdon L, Patricio-Martínez A. Disturbance of the Glutamate-Glutamine Cycle, Secondary to Hepatic Damage, Compromises Memory Function. Front Neurosci 2021; 15:578922. [PMID: 33584185 PMCID: PMC7873464 DOI: 10.3389/fnins.2021.578922] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 01/06/2021] [Indexed: 12/13/2022] Open
Abstract
Glutamate fulfils many vital functions both at a peripheral level and in the central nervous system (CNS). However, hyperammonemia and hepatic failure induce alterations in glutamatergic neurotransmission, which may be the main cause of hepatic encephalopathy (HE), an imbalance which may explain damage to both learning and memory. Cognitive and motor alterations in hyperammonemia may be caused by a deregulation of the glutamate-glutamine cycle, particularly in astrocytes, due to the blocking of the glutamate excitatory amino-acid transporters 1 and 2 (EAAT1, EAAT2). Excess extracellular glutamate triggers mechanisms involving astrocyte-mediated inflammation, including the release of Ca2+-dependent glutamate from astrocytes, the appearance of excitotoxicity, the formation of reactive oxygen species (ROS), and cell damage. Glutamate re-uptake not only prevents excitotoxicity, but also acts as a vital component in synaptic plasticity and function. The present review outlines the evidence of the relationship between hepatic damage, such as that occurring in HE and hyperammonemia, and changes in glutamine synthetase function, which increase glutamate concentrations in the CNS. These conditions produce dysfunction in neuronal communication. The present review also includes data indicating that hyperammonemia is related to the release of a high level of pro-inflammatory factors, such as interleukin-6, by astrocytes. This neuroinflammatory condition alters the function of the membrane receptors, such as N-methyl-D-aspartate (NMDA), (α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) AMPA, and γ-aminobutyric acid (GABA), thus affecting learning and spatial memory. Data indicates that learning and spatial memory, as well as discriminatory or other information acquisition processes in the CNS, are damaged by the appearance of hyperammonemia and, moreover, are associated with a reduction in the production of cyclic guanosine monophosphate (cGMP). Therefore, increased levels of pharmacologically controlled cGMP may be used as a therapeutic tool for improving learning and memory in patients with HE, hyperammonemia, cerebral oedema, or reduced intellectual capacity.
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Affiliation(s)
| | - Isael Angulo-Cruz
- Laboratorio de Neurofarmacología, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Lesli Sánchez-Abdon
- Laboratorio de Neurofarmacología, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Aleidy Patricio-Martínez
- Laboratorio de Neurofarmacología, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
- Facultad de Ciencias Biológicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
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12
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Boll I, Jensen P, Schwämmle V, Larsen MR. Depolarization-dependent Induction of Site-specific Changes in Sialylation on N-linked Glycoproteins in Rat Nerve Terminals. Mol Cell Proteomics 2020; 19:1418-1435. [PMID: 32518069 PMCID: PMC8143646 DOI: 10.1074/mcp.ra119.001896] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 06/08/2020] [Indexed: 12/11/2022] Open
Abstract
Synaptic transmission leading to release of neurotransmitters in the nervous system is a fast and highly dynamic process. Previously, protein interaction and phosphorylation have been thought to be the main regulators of synaptic transmission. Here we show that sialylation of N-linked glycosylation is a novel potential modulator of neurotransmitter release mechanisms by investigating depolarization-dependent changes of formerly sialylated N-linked glycopeptides. We suggest that negatively charged sialic acids can be modulated, similarly to phosphorylation, by the action of sialyltransferases and sialidases thereby changing local structure and function of membrane glycoproteins. We characterized site-specific alteration in sialylation on N-linked glycoproteins in isolated rat nerve terminals after brief depolarization using quantitative sialiomics. We identified 1965 formerly sialylated N-linked glycosites in synaptic proteins and found that the abundances of 430 glycosites changed after 5 s depolarization. We observed changes on essential synaptic proteins such as synaptic vesicle proteins, ion channels and transporters, neurotransmitter receptors and cell adhesion molecules. This study is to our knowledge the first to describe ultra-fast site-specific modulation of the sialiome after brief stimulation of a biological system.
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Affiliation(s)
- Inga Boll
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
| | - Pia Jensen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
| | - Veit Schwämmle
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark
| | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M, Denmark.
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13
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Puigdellívol M, Allendorf DH, Brown GC. Sialylation and Galectin-3 in Microglia-Mediated Neuroinflammation and Neurodegeneration. Front Cell Neurosci 2020; 14:162. [PMID: 32581723 PMCID: PMC7296093 DOI: 10.3389/fncel.2020.00162] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 05/15/2020] [Indexed: 12/31/2022] Open
Abstract
Microglia are brain macrophages that mediate neuroinflammation and contribute to and protect against neurodegeneration. The terminal sugar residue of all glycoproteins and glycolipids on the surface of mammalian cells is normally sialic acid, and addition of this negatively charged residue is known as “sialylation,” whereas removal by sialidases is known as “desialylation.” High sialylation of the neuronal cell surface inhibits microglial phagocytosis of such neurons, via: (i) activating sialic acid receptors (Siglecs) on microglia that inhibit phagocytosis and (ii) inhibiting binding of opsonins C1q, C3, and galectin-3. Microglial sialylation inhibits inflammatory activation of microglia via: (i) activating Siglec receptors CD22 and CD33 on microglia that inhibit phagocytosis and (ii) inhibiting Toll-like receptor 4 (TLR4), complement receptor 3 (CR3), and other microglial receptors. When activated, microglia release a sialidase activity that desialylates both microglia and neurons, activating the microglia and rendering the neurons susceptible to phagocytosis. Activated microglia also release galectin-3 (Gal-3), which: (i) further activates microglia via binding to TLR4 and TREM2, (ii) binds to desialylated neurons opsonizing them for phagocytosis via Mer tyrosine kinase, and (iii) promotes Aβ aggregation and toxicity in vivo. Gal-3 and desialylation may increase in a variety of brain pathologies. Thus, Gal-3 and sialidases are potential treatment targets to prevent neuroinflammation and neurodegeneration.
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Affiliation(s)
- Mar Puigdellívol
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - David H Allendorf
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Guy C Brown
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
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14
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Minami A, Fujita Y, Shimba S, Shiratori M, Kaneko YK, Sawatani T, Otsubo T, Ikeda K, Kanazawa H, Mikami Y, Sekita R, Kurebayashi Y, Takahashi T, Miyagi T, Ishikawa T, Suzuki T. The sialidase inhibitor 2,3-dehydro-2-deoxy-N-acetylneuraminic acid is a glucose-dependent potentiator of insulin secretion. Sci Rep 2020; 10:5198. [PMID: 32251344 PMCID: PMC7089948 DOI: 10.1038/s41598-020-62203-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 03/06/2020] [Indexed: 12/12/2022] Open
Abstract
Sialidase cleaves sialic acid residues from a sialoglycoconjugate: oligosaccharides, glycolipids and glycoproteins that contain sialic acid. Histochemical imaging of the mouse pancreas using a benzothiazolylphenol-based sialic acid derivative (BTP3-Neu5Ac), a highly sensitive histochemical imaging probe used to assess sialidase activity, showed that pancreatic islets have intense sialidase activity. The sialidase inhibitor 2,3-dehydro-2-deoxy-N-acetylneuraminic acid (DANA) remarkably enhances glutamate release from hippocampal neurons. Since there are many similar processes between synaptic vesicle exocytosis and secretory granule exocytosis, we investigated the effect of DANA on insulin release from β-cells. Insulin release was induced in INS-1D cells by treatment with 8.3 mM glucose, and the release was enhanced by treatment with DANA. In a mouse intraperitoneal glucose tolerance test, the increase in serum insulin levels was enhanced by intravenous injection with DANA. However, under fasting conditions, insulin release was not enhanced by treatment with DANA. Calcium oscillations induced by 8.3 mM glucose treatment of INS-1D cells were not affected by DANA. Blood insulin levels in sialidase isozyme Neu3-deficient mice were significantly higher than those in WT mice under ad libitum feeding conditions, but the levels were not different under fasting conditions. These results indicate that DANA is a glucose-dependent potentiator of insulin secretion. The sialidase inhibitor may be useful for anti-diabetic treatment with a low risk of hypoglycemia.
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Affiliation(s)
- Akira Minami
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan.
| | - Yuka Fujita
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Sumika Shimba
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Mako Shiratori
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Yukiko K Kaneko
- Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Toshiaki Sawatani
- Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Tadamune Otsubo
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, Hiroshima, 737-0112, Japan
| | - Kiyoshi Ikeda
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, Hiroshima, 737-0112, Japan
| | - Hiroaki Kanazawa
- Department of Functional Anatomy, School of Nursing, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Yasuyo Mikami
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Risa Sekita
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Yuuki Kurebayashi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Tadanobu Takahashi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Taeko Miyagi
- Miyagi Cancer Center Research Institute, Natori, 981-1293, Japan
| | - Tomohisa Ishikawa
- Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Takashi Suzuki
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan.
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15
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Khavrutskii IV, Compton JR, Jurkouich KM, Legler PM. Paired Carboxylic Acids in Enzymes and Their Role in Selective Substrate Binding, Catalysis, and Unusually Shifted p Ka Values. Biochemistry 2019; 58:5351-5365. [PMID: 31192586 DOI: 10.1021/acs.biochem.9b00429] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cathepsin A (CatA, EC 3.4.16.5, UniProtKB P10619 ) is a human lysosomal carboxypeptidase. Counterintuitively, crystal structures of CatA and its homologues show a cluster of Glu and Asp residues binding the C-terminal carboxylic acid of the product or inhibitor. Each of these enzymes functions in an acidic environment and contains a highly conserved pair of Glu residues with side chain carboxyl group oxygens that are approximately 2.3-2.6 Å apart. In small molecules, carboxyl groups separated by ∼3 Å can overcome the repulsive interaction by protonation of one of the two groups. The pKa of one group increases (pKa ∼ 11) and can be as much as ∼6 pH units higher than the paired group. Consequently, at low and neutral pH, one carboxylate can carry a net negative charge while the other can remain protonated and neutral. In CatA, E69 and E149 form a Glu pair that is important to catalysis as evidenced by the 56-fold decrease in kcat/Km in the E69Q/E149Q variant. Here, we have measured the pH dependencies of log(kcat), log(Km), and log(kcat/Km) for wild type CatA and its variants and have compared the measured pKa with calculated values. We propose a substrate-assisted mechanism in which the high pKa of E149 (>8.5) favors the binding of the carboxylate form of the substrate and promotes the abstraction of the proton from H429 of the catalytic triad effectively decreasing its pKa in a low-pH environment. We also identify a similar motif consisting of a pair of histidines in S-formylglutathione hydrolase.
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Affiliation(s)
- Ilja V Khavrutskii
- Armed Forces Radiobiology Research Institute , Uniformed Services University , Bethesda , Maryland 20889-5648 , United States
| | - Jaimee R Compton
- U.S. Naval Research Laboratory , 4555 Overlook Avenue , Washington, D.C. 20375 , United States
| | - Kayla M Jurkouich
- Department of Biomedical Engineering , Case Western Reserve University , Cleveland , Ohio 44106 , United States
| | - Patricia M Legler
- U.S. Naval Research Laboratory , 4555 Overlook Avenue , Washington, D.C. 20375 , United States
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16
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Wei M, Wang PG. Desialylation in physiological and pathological processes: New target for diagnostic and therapeutic development. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2019; 162:25-57. [PMID: 30905454 DOI: 10.1016/bs.pmbts.2018.12.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [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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17
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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] [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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18
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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] [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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19
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Pshezhetsky AV, Ashmarina M. Keeping it trim: roles of neuraminidases in CNS function. Glycoconj J 2018; 35:375-386. [PMID: 30088207 PMCID: PMC6182584 DOI: 10.1007/s10719-018-9837-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/25/2018] [Accepted: 07/27/2018] [Indexed: 12/11/2022]
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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20
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Abstract
Sialidase releases sialic acid residues from the ends of sugar chains. The sialidases are involved in many physiological processes including cell differentiation and proliferation and immune function as well as pathophysiological conditions such as various human cancers and infections. Therefore visualization of sialidase activities with high sensitivity could provide valuable insights into these isozyme's activity. We developed novel fluorescent sialidase substrates, 2-benzothiazol-2-yl-phenol derivatives-based N-acetylneuraminic acid (Neu5Ac) (BTP-Neu5Ac) substrates, for highly sensitive and specific visualization of sialidase activity in living mammalian tissues and virus-infected cells. We found that BTP-Neu5Ac can visualize sialidase activities sensitively and selectively in rat tissues including brain slices. BTP-Neu5Ac can also clearly detect cancer cells implanted orthotopically in mouse colons and human colon cancers. In this review, I describe imaging of sialidase activity with BTP-Neu5Ac in animal tissues, detection of colon cancer, memory formation, detection of virus-infected cells, and application to drug-resistant influenza virus detection and separation.
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Affiliation(s)
- Takashi Suzuki
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka
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21
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Minami A, Ishii A, Shimba S, Kano T, Fujioka E, Sai S, Oshio N, Ishibashi S, Takahashi T, Kurebayashi Y, Kanazawa H, Yuki N, Otsubo T, Ikeda K, Suzuki T. Down-regulation of glutamate release from hippocampal neurons by sialidase. J Biochem 2018; 163:273-280. [PMID: 29319803 DOI: 10.1093/jb/mvy003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 09/26/2017] [Indexed: 11/12/2022] Open
Abstract
Sialidase, which removes sialic acid residues in sialylglycoconjugates, is essential for hippocampal memory and synaptic plasticity. Enzyme activity of sialidase is rapidly increased in response to neural excitation. Because sialic acid bound to gangliosides such as the tetra-sialoganglioside GQ1b is crucial for calcium signalling and neurotransmitter release, neural activity-dependent removal of sialic acid may affect hippocampal neurotransmission. In the present study, we found that 2-deoxy-2, 3-didehydro-D-N-acetylneuraminic acid (DANA), a sialidase inhibitor, increased expression of ganglioside GQ1b/GT1a in hippocampal acute slices. Extracellular glutamate level in the rat hippocampus measured by using in vivo microdialysis was increased by the sialidase inhibitor 2, 3-dehydro-2-deoxy-N-glycolylneuraminic acid as well as DANA. Synaptic vesicle exocytosis and intracellular Ca2+ increase evoked by high-K+ were also enhanced by DANA in primary cultured hippocampal neurons. Expression of GQ1b/GT1a was rapidly decreased by depolarization with high-K+, suggesting that the increase in sialidase activity by neural excitation is sufficient for cleavage of sialic acid. Our findings indicate that sialidase down-regulates glutamate release from hippocampal neurons via Ca2+ signalling modulation. Neural activity-dependent desialylation by sialidase may be a negative-feedback factor against presynaptic activity.
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Affiliation(s)
- Akira Minami
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Ami Ishii
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Sumika Shimba
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Takahiro Kano
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Eri Fujioka
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Saki Sai
- Department of Biochemistry, School of Pharmaceutical Sciences
| | - Nagisa Oshio
- Department of Biochemistry, School of Pharmaceutical Sciences
| | | | | | | | - Hiroaki Kanazawa
- Department of Functional Anatomy, School of Nursing, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Nobuhiro Yuki
- Department of Neurology, Mishima Hospital, 1713-8 Fujikawa, Niigata 940-2302, Japan
| | - Tadamune Otsubo
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshinkai, Hiroshima 737-0112, Japan
| | - Kiyoshi Ikeda
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshinkai, Hiroshima 737-0112, Japan
| | - Takashi Suzuki
- Department of Biochemistry, School of Pharmaceutical Sciences
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Minami A, Meguro Y, Ishibashi S, Ishii A, Shiratori M, Sai S, Horii Y, Shimizu H, Fukumoto H, Shimba S, Taguchi R, Takahashi T, Otsubo T, Ikeda K, Suzuki T. Rapid regulation of sialidase activity in response to neural activity and sialic acid removal during memory processing in rat hippocampus. J Biol Chem 2017; 292:5645-5654. [PMID: 28213516 DOI: 10.1074/jbc.m116.764357] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 02/07/2017] [Indexed: 12/12/2022] Open
Abstract
Sialidase cleaves sialic acids on the extracellular cell surface as well as inside the cell and is necessary for normal long-term potentiation (LTP) at mossy fiber-CA3 pyramidal cell synapses and for hippocampus-dependent spatial memory. Here, we investigated in detail the role of sialidase in memory processing. Sialidase activity measured with 4-methylumbelliferyl-α-d-N-acetylneuraminic acid (4MU-Neu5Ac) or 5-bromo-4-chloroindol-3-yl-α-d-N-acetylneuraminic acid (X-Neu5Ac) and Fast Red Violet LB was increased by high-K+-induced membrane depolarization. Sialidase activity was also increased by chemical LTP induction with forskolin and activation of BDNF signaling, non-NMDA receptors, or NMDA receptors. The increase in sialidase activity with neural excitation appears to be caused not by secreted sialidase or by an increase in sialidase expression but by a change in the subcellular localization of sialidase. Astrocytes as well as neurons are also involved in the neural activity-dependent increase in sialidase activity. Sialidase activity visualized with a benzothiazolylphenol-based sialic acid derivative (BTP3-Neu5Ac), a highly sensitive histochemical imaging probe for sialidase activity, at the CA3 stratum lucidum of rat acute hippocampal slices was immediately increased in response to LTP-inducible high-frequency stimulation on a time scale of seconds. To obtain direct evidence for sialic acid removal on the extracellular cell surface during neural excitation, the extracellular free sialic acid level in the hippocampus was monitored using in vivo microdialysis. The free sialic acid level was increased by high-K+-induced membrane depolarization. Desialylation also occurred during hippocampus-dependent memory formation in a contextual fear-conditioning paradigm. Our results show that neural activity-dependent desialylation by sialidase may be involved in hippocampal memory processing.
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Affiliation(s)
- Akira Minami
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Yuko Meguro
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Sayaka Ishibashi
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Ami Ishii
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Mako Shiratori
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Saki Sai
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Yuuki Horii
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Hirotaka Shimizu
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Hokuto Fukumoto
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Sumika Shimba
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Risa Taguchi
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Tadanobu Takahashi
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
| | - Tadamune Otsubo
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure-shi, Hiroshima 737-0112, Japan
| | - Kiyoshi Ikeda
- Department of Organic Chemistry, School of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure-shi, Hiroshima 737-0112, Japan
| | - Takashi Suzuki
- From the Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan and
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