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Liang M, Gao Y, Shen Y, Zhang X, Gu J, Ji G. Serum metabolism distribution in individuals exposed to dioxins: A case study of residents near the municipal solid waste incinerators in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174431. [PMID: 38960151 DOI: 10.1016/j.scitotenv.2024.174431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/27/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) have attracted considerable attention owing to their environmental persistence, bioaccumulation, and high toxicity. This study aimed to investigate changes in serum metabolites following exposure to PCDD/Fs and to reveal a novel pathogenesis of PCDD/Fs. Serum samples were collected from 75 residents living near a municipal solid waste incinerator in China to analyse the relationship between PCDD/Fs and serum metabolic components. The serum level in the low-exposure group [19.07 (13.44-23.89) pg-TEQ/L] was significantly lower than that in the high-exposure group [115.60 (52.28-592.65) pg-TEQ/L]. Non-targeted metabolomic studies based on liquid chromatography-high resolution mass spectrometry have been applied to the metabolomic analysis of serum. Thirty-seven metabolites with significant differences among the different groups were identified as biomarkers. Pathway analysis revealed that high dioxin exposure perturbed various biological processes, including glycerol phospholipid metabolism and the interconversion of pentose and glucuronate. The results of a population health survey showed that the serum dioxin concentration in patients with diabetes was significantly higher than that in the control population. These findings suggest that dioxin exposure is associated with several potential adverse health risks, including inflammation, diabetes, and cardiovascular disease, through metabolic changes.
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Affiliation(s)
- Mengyuan Liang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Yuanyun Gao
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Yuehong Shen
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Xinyu Zhang
- School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Jie Gu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Guixiang Ji
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
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Orientational Preferences of GPI-Anchored Ly6/uPAR Proteins. Int J Mol Sci 2022; 24:ijms24010011. [PMID: 36613456 PMCID: PMC9819746 DOI: 10.3390/ijms24010011] [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: 11/17/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Ly6/uPAR proteins regulate many essential functions in the nervous and immune systems and epithelium. Most of these proteins contain single β-structural LU domains with three protruding loops and are glycosylphosphatidylinositol (GPI)-anchored to a membrane. The GPI-anchor role is currently poorly studied. Here, we investigated the positional and orientational preferences of six GPI-anchored proteins in the receptor-unbound state by molecular dynamics simulations. Regardless of the linker length between the LU domain and GPI-anchor, the proteins interacted with the membrane by polypeptide parts and N-/O-glycans. Lynx1, Lynx2, Lypd6B, and Ly6H contacted the membrane by the loop regions responsible for interactions with nicotinic acetylcholine receptors, while Lypd6 and CD59 demonstrated unique orientations with accessible receptor-binding sites. Thus, GPI-anchoring does not guarantee an optimal 'pre-orientation' of the LU domain for the receptor interaction.
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Kawaguchi K, Yamamoto-Hino M, Goto S. SPPL3-dependent downregulation of the synthesis of (neo)lacto-series glycosphingolipid is required for the staining of cell surface CD59. Biochem Biophys Res Commun 2021; 571:81-87. [PMID: 34303967 DOI: 10.1016/j.bbrc.2021.06.093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 06/27/2021] [Indexed: 10/20/2022]
Abstract
CD59 is a small glycoprotein modified with a glycophosphatidylinositol (GPI) anchor that prevents the formation of the membrane attack complex, thereby protecting host cells from lysis. A previous study identified that cell surface CD59 staining required the intramembrane protease signal peptide peptidase-like 3 (SPPL3). However, the effect of SPPL3 on the staining of CD59 remains unknown. This study shows that SPPL3 is essential for the surface labeling of CD59 but not of major GPI-anchored proteins. Surface CD59 staining requires the intramembrane protease activity of SPPL3 and SPPL3-mediated suppression of the (neo)lacto-series glycosphingolipids (nsGSLs)-but not N-glycan-synthesis pathway. The abundance of nsGSLs may affect complement-dependent cytotoxicity by altering the abundance or accessibility of cell surface CD59.
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Affiliation(s)
- Kohei Kawaguchi
- Department of Life Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Miki Yamamoto-Hino
- Department of Life Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Satoshi Goto
- Department of Life Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan.
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Boon L, Ugarte-Berzal E, Martens E, Vandooren J, Rybakin V, Colau D, Gordon-Alonso M, van der Bruggen P, Stöcker W, Becker-Pauly C, Witters P, Morava E, Jaeken J, Proost P, Opdenakker G. Propeptide glycosylation and galectin-3 binding decrease proteolytic activation of human proMMP-9/progelatinase B. FEBS J 2018; 286:930-945. [PMID: 30422384 PMCID: PMC7379967 DOI: 10.1111/febs.14698] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/21/2018] [Accepted: 11/09/2018] [Indexed: 01/06/2023]
Abstract
Matrix metalloproteinases (MMPs) are secreted as proenzymes, containing propeptides that interact with the catalytic zinc, thereby controlling MMP activation. The MMP‐9 propeptide is unique in the MMP family because of its post‐translational modification with an N‐linked oligosaccharide. ProMMP‐9 activation by MMP‐3 occurs stepwise by cleavage of the propeptide in an aminoterminal (pro‐AT) and carboxyterminal (pro‐CT) peptide. We chemically synthesized aglycosyl pro‐AT and pro‐CT and purified recombinant glycosylated pro‐ATSf−9. First, we report new cleavage sites in the MMP‐9 propeptide by MMP‐3 and neutrophil elastase. Additionally, we demonstrated with the use of western blot analysis a higher resistance of glycosylated versus aglycosyl pro‐AT against proteolysis by MMP‐3, MMP‐9, meprin α, neutrophil elastase and by protease‐rich synovial fluids from rheumatoid arthritis patients. Moreover, we investigated the effect of glycosylation on proteolytic activation of human proMMP‐9 with the use of zymography and dye‐quenched gelatin cleavage analysis. Compared to recombinant Sf‐9 proMMP‐9 glycoforms, larger oligosaccharides of human neutrophil proMMP‐9 increased resistance against proteolytic activation. Additionally, proMMP‐9 from Congenital Disorder of Glycosylation patients, compared to healthy controls, showed a higher activation rate by MMP‐3. Finally, we demonstrated that glycan‐galectin‐3 interactions reduced proMMP‐9 activation. In conclusion, modification of MMP‐9 propeptide glycosylation is a fine‐tuning mechanism and co‐determines the specific activity of MMP‐9 in physiology and pathology. Enzymes MMP‐9 EC 3.4.24.35, MMP‐3 EC 3.4.24.17, meprin α EC 3.4.24.18, neutrophil elastase EC 3.4.21.37, trypsin EC 3.4.21.4 and PNGase F EC 3.5.1.52.
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Affiliation(s)
- Lise Boon
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven, Belgium
| | | | - Erik Martens
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Jennifer Vandooren
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Vasily Rybakin
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Didier Colau
- Ludwig Institute for Cancer Research, Brussels, Belgium
| | | | | | - Walter Stöcker
- Institute of Molecular Physiology, Johannes Gutenberg University, Mainz, Germany
| | | | - Peter Witters
- Department of Pediatrics, University Hospitals Leuven, KU Leuven, Belgium.,Department of Development and Regeneration, KU Leuven, Belgium
| | - Eva Morava
- Department of Clinical Genomics, Mayo Clinic, Rochester, ON, USA
| | - Jaak Jaeken
- Department of Pediatrics, University Hospitals Leuven, KU Leuven, Belgium.,Department of Development and Regeneration, KU Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Ghislain Opdenakker
- Laboratory of Immunobiology, Rega Institute for Medical Research, KU Leuven, Belgium
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Omidvar N, Wang ECY, Brennan P, Longhi MP, Smith RAG, Morgan BP. Expression of glycosylphosphatidylinositol-anchored CD59 on target cells enhances human NK cell-mediated cytotoxicity. THE JOURNAL OF IMMUNOLOGY 2006; 176:2915-23. [PMID: 16493049 PMCID: PMC2843080 DOI: 10.4049/jimmunol.176.5.2915] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
NK cell-mediated cytotoxicity of target cells is the result of a balance between the activating and inhibitory signals provided by their respective ligand-receptor interactions. In our current study, we have investigated the significance of CD59 on human target cells in modulating this process. A range of CD59 site-specific Abs were used in NK cytotoxicity blocking studies against the CD59-expressing K562 target cell line. Significantly reduced cytotoxicity was observed in the presence of Abs previously shown to lack blocking capacity for C-mediated lysis. We investigated the consequences for alternative membrane attachment modalities, namely bis-myristoylated-peptidyl (BiMP) and GPI anchoring, on CD59-negative U937 cells. Expression of GPI-anchored CD59 either via transfection or incorporation rendered U937 targets more susceptible to NK cytotoxicity, whereas incorporation of CD59 via a BiMP anchor to similar levels did not alter susceptibility to NK cytotoxicity. Localization of both BiMP- and GPI-anchored CD59 proteins was shown to be within the lipid raft microdomain. A role for the GPI anchor and independence from glycosylation status was confirmed by expression of transmembrane-anchored CD59 or unglycosylated CD59 and by testing in NK cytotoxicity assays. To investigate mechanisms, we compared the signaling capacity of the various forms of expressed and incorporated CD59 following Ab cross-linking in calcium flux assays. GPI-anchored CD59, with or without glycosylation, mediated activation events, whereas CD59 forms lacking the GPI anchor did not. The data show that the increased susceptibility of target cells expressing CD59 to NK cytotoxicity requires GPI anchor-mediating signaling events, likely mediated by interactions between GPI-anchored CD59 on targets and NK receptors.
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Affiliation(s)
- Nader Omidvar
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Eddie C. Y. Wang
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - Paul Brennan
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | - M. Paula Longhi
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
| | | | - B. Paul Morgan
- Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Address correspondence and reprint requests to Dr. B. Paul Morgan, Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, U.K.
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Affiliation(s)
- Zhongwu Guo
- Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106−7078, USA, Fax: (internat.) +1‐216‐368‐3006
| | - Lee Bishop
- Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106−7078, USA, Fax: (internat.) +1‐216‐368‐3006
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