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Rodrigues FS, da Silva VAM, Segovia GBQ, Bortoluzzi AJ, Cuin A, de Souza JIR, da Silva JAB, Lourenço da Luz L, Alves Júnior S, Tonon de Almeida E, Camargo MA. Synthesis, solid state characterization, theoretical and experimental spectroscopic studies of the new lanthanide complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 296:122677. [PMID: 37030253 DOI: 10.1016/j.saa.2023.122677] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/15/2023] [Accepted: 03/26/2023] [Indexed: 06/19/2023]
Abstract
Three new complexes Na[Ln(pic)4]ּ⋅2.5H2O (Ln = Tb, Eu or Gd; pic = picolinate) were synthesized and characterized by infrared spectroscopy, powder X-ray diffraction and thermogravimetric analyses. The molecular structures of the complexes have been determined by single-crystal X-ray diffraction. The three isostructural lanthanide complexes crystalize in the hexagonal system with space group P6122 to Eu complex and Gd complex and space group P6522 to Tb complex. In each of the complexes, the picolinate ligands are bonded to Ln3+ and Na+ ions by different coordination modes promoting polymeric structures. The photoluminescent properties of complexes were studied and combined with theoretical studies using the density functional theory (DFT: B3LYP, PBE1PBE) and the semiempirical method AM1/Sparkle from the single crystal X-ray diffraction structures to assign a suitable model for describing the system. The B3LYP DFT functional was considered the most adequate for providing structural properties of the compounds and for describing luminescence properties. The excited triplet states (T1) and excited singlet states (S1) of the ligand were determined theoretically using Time-dependent DFT calculations (TD-DFT: B3LYP, CAM-B3LYP and LC-wPBE) and INDO/S-CIS, with the best agreement with experimental values obtained from the LC-wPBE DFT functional. The photoluminescent spectra of the complexes and their lifetime measurements were determined indicating that the Eu complex and Tb complex display different intramolecular energy transfer mechanisms with higher efficiency to ligand-to-terbium energy transfer. In addition, the experimental and theorical Judd-Ofelt intensity parameters and quantum yields of the complexes were also determined and discussed besides to a proposed 9-state diagram to describe the luminescence properties of the Eu complex. The low value of emission quantum efficiency of 5D0 emitting level of Eu(III) ion was explained by the presence of the ligand-to-metal charge transfer state (LMCT) evidenced experimentally and theoretically. A good agreement was obtained between the proposed kinetic model and experimental results showing the consistency of the set of rate equations assumed and the intramolecular pathways proposed.
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Affiliation(s)
- Fernanda Sodré Rodrigues
- Laboratório de Síntese Inorgânica e Bioinorgânica, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
| | | | | | - Adailton João Bortoluzzi
- Laboratório de Bioinorgânica e Cristalografia (LABINC), Departamento de Química, Universidade de Santa Catarina, Florianópolis, SC, Brazil
| | - Alexandre Cuin
- Laboratório de Quimica Bioinorgânica, Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Jéssica I R de Souza
- Programa de Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Juliana A B da Silva
- Núcleo Interdisciplinar de Ciências Exatas e da Natureza, Campus do Agreste, Universidade Federal de Pernambuco, Caruaru, PE, Brazil; Programa de Pós-Graduação em Química, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
| | - Leonis Lourenço da Luz
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Severino Alves Júnior
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | | | - Maryene Alves Camargo
- Laboratório de Síntese Inorgânica e Bioinorgânica, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil.
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Review: Fluid biomarkers in the human prion diseases. Mol Cell Neurosci 2018; 97:81-92. [PMID: 30529227 DOI: 10.1016/j.mcn.2018.12.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/29/2018] [Accepted: 12/03/2018] [Indexed: 01/27/2023] Open
Abstract
The human prion diseases are a diverse set of often rapidly progressive neurodegenerative conditions associated with abnormal forms of the prion protein. We review work to establish diagnostic biomarkers and assays that might fill other important roles, particularly those that could assist the planning and interpretation of clinical trials. The field now benefits from highly sensitive and specific diagnostic biomarkers using cerebrospinal fluid: detecting by-products of rapid neurodegeneration or specific functional properties of abnormal prion protein, with the second generation real time quaking induced conversion (RT-QuIC) assay being particularly promising. Blood has been a more challenging analyte, but has now also yielded valuable biomarkers. Blood-based assays have been developed with the potential to screen for variant Creutzfeldt-Jakob disease, although it remains uncertain whether these will ever be used in practice. The very rapid neurodegeneration of prion disease results in strong signals from surrogate protein markers in the blood that reflect neuronal, axonal, synaptic or glial pathology in the brain: notably the tau and neurofilament light chain proteins. We discuss early evidence that such tests, applied alongside robust diagnostic biomarkers, may have potential to add value as clinical trial outcome measures, predictors of future disease course (including for asymptomatic individuals at high risk of prion disease), and as rapidly accessible and sensitive markers to aid early diagnosis.
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Zherdeva VV, Savitsky AP. Using lanthanide-based resonance energy transfer for in vitro and in vivo studies of biological processes. BIOCHEMISTRY (MOSCOW) 2013; 77:1553-74. [DOI: 10.1134/s0006297912130111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Kuczius T, Kleinert J, Karch H, Sibrowski W, Kelsch R. Cellular prion proteins in human platelets show a phenotype different to those in brain tissues. J Cell Biochem 2011; 112:954-62. [PMID: 21328470 DOI: 10.1002/jcb.23012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Prion diseases are characterized by high accumulation of infectious prion proteins (PrP(Sc)) in brains. PrP(Sc) are propagated by the conversion of host-encoded cellular prion proteins (PrP(C)) which are essential for developing the disease but are heterogeneously expressed in brains. The disease can be transmitted to humans and animals through blood and blood products, however, little attention has been given to molecular characterization of PrP(C) in blood cells. In this presented study, we characterized phenotypically PrP(C) of platelets (plt) and characterized the proteins regarding their glycobanding profiles by quantitative immunoblotting using a panel of monoclonal antibodies. The glycosylation patterns of plt and brain PrP(C) were compared using the ratios of di-, mono-, and non-glycosylated prions. The detergent solubility of plt and brain PrP(C) was also analyzed. The distinct banding patterns and detergent solubility of plt PrP(C) differed clearly from the glycosylation profiles and solubility characteristics of brain PrP(C). Plt PrP(C) exhibited single or only few prion protein types, whereas brain PrP(C) showed more extensive banding patterns and lower detergent solubility. Plt PrP(C) are post-translational modified differently from PrP(C) in brain. These findings suggest other or less physiological functions of plt PrP(C) than in brain.
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Affiliation(s)
- Thorsten Kuczius
- Institute for Hygiene, Westfälische Wilhelms-University and University Hospital Münster, Robert Koch-Strasse 41, 48149 Münster, Germany.
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Holznagel E, Yutzy B, Schulz-Schaeffer W, Hanschman KM, Stuke A, Hahmann U, Törner M, Coulibaly C, Hoffmann A, Hunsmann G, Löwer J. Increase in CD230 (cellular prion protein) fluorescence on blood lymphocytes in bovine spongiform encephalopathy-infected nonhuman primates. Transfusion 2010; 50:452-66. [DOI: 10.1111/j.1537-2995.2009.02437.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Prion proteins in subpopulations of white blood cells from patients with sporadic Creutzfeldt-Jakob disease. J Transl Med 2009; 89:624-35. [PMID: 19434060 PMCID: PMC2786774 DOI: 10.1038/labinvest.2009.30] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Recent cases of prion transmission in humans following transfusions using blood donated by patients with asymptomatic variant Creutzfeldt-Jakob disease (CJD) implicate the presence of prion infectivity in peripheral blood. In this study, we examined the levels of the normal, cellular prion protein (PrPC), and the disease-causing isoform (PrPSc) in subpopulations of circulating white blood cells (WBCs) from patients with sporadic (s) CJD, age-matched neurological controls and healthy donors. Though widely distributed, the highest levels of PrPC were found in a subpopulation of T lymphocytes: approximately 12,000 PrPC molecules were found per CD4+CD45RA-CD62L- effector memory T helper cell. Although platelets expressed low levels of PrPC on their surface, their high abundance in circulation resulted in the majority of PrPC being platelet associated. Using quantitative fluorescence-activated cell sorting analysis, we found that neither WBC composition nor the amount of cell-surface PrPC molecules was altered in patients with sCJD. Eight different WBC fraction types from the peripheral blood of patients with sCJD were assessed for PrPSc. We were unable to find any evidence for PrPSc in purified granulocytes, monocytes, B cells, CD4+ T cells, CD8+ T cells, natural killer cells, nonclassical gamma delta T cells, or platelets. If human WBCs harbor prion infectivity in patients with sCJD, then the levels are likely to be low.
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Mattei V, Barenco MG, Tasciotti V, Garofalo T, Longo A, Boller K, Löwer J, Misasi R, Montrasio F, Sorice M. Paracrine diffusion of PrP(C) and propagation of prion infectivity by plasma membrane-derived microvesicles. PLoS One 2009; 4:e5057. [PMID: 19337375 PMCID: PMC2659799 DOI: 10.1371/journal.pone.0005057] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Accepted: 02/23/2009] [Indexed: 11/18/2022] Open
Abstract
Cellular prion protein (PrPc) is a physiological constituent of eukaryotic cells. The cellular pathways underlying prions spread from the sites of prions infection/peripheral replication to the central nervous system are still not elucidated. Membrane-derived microvesicles (MVs) are submicron (0.1–1 µm) particles, that are released by cells during plasma membrane shedding processes. They are usually liberated from different cell types, mainly upon activation as well as apoptosis, in this case, one of their hallmarks is the exposure of phosphatidylserine in the outer leaflet of the membrane. MVs are also characterized by the presence of adhesion molecules, MHC I molecules, as well as of membrane antigens typical of their cell of origin. Evidence exists that MVs shedding provide vehicles to transfer molecules among cells, and that MVs are important modulators of cell-to-cell communication. In this study we therefore analyzed the potential role of membrane-derived MVs in the mechanism(s) of PrPC diffusion and prion infectivity transmission. We first identified PrPC in association with the lipid raft components Fyn, flotillin-2, GM1 and GM3 in MVs from plasma of healthy human donors. Similar findings were found in MVs from cell culture supernatants of murine neuronal cells. Furthermore we demonstrated that PrPSc is released from infected murine neuronal cells in association with plasma membrane-derived MVs and that PrPSc-bearing MVs are infectious both in vitro and in vivo. The data suggest that MVs may contribute both to the intercellular mechanism(s) of PrPC diffusion and signaling as well as to the process of prion spread and neuroinvasion.
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Affiliation(s)
- Vincenzo Mattei
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
- Laboratorio di Medicina Sperimentale e Patologia Ambientale, “Sapienza” University, Polo Universitario di Rieti “Sabina Universitas“, Rieti, Italy
| | - Maria Grazia Barenco
- Prion Research Group, Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse, Langen, Germany
| | - Vincenzo Tasciotti
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
- Laboratorio di Medicina Sperimentale e Patologia Ambientale, “Sapienza” University, Polo Universitario di Rieti “Sabina Universitas“, Rieti, Italy
| | - Tina Garofalo
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
| | - Agostina Longo
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
| | - Klaus Boller
- Prion Research Group, Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse, Langen, Germany
| | - Johannes Löwer
- Prion Research Group, Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse, Langen, Germany
| | - Roberta Misasi
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
| | - Fabio Montrasio
- Prion Research Group, Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse, Langen, Germany
| | - Maurizio Sorice
- Dipartimento di Medicina Sperimentale, “Sapienza” University, Rome, Italy
- Laboratorio di Medicina Sperimentale e Patologia Ambientale, “Sapienza” University, Polo Universitario di Rieti “Sabina Universitas“, Rieti, Italy
- * E-mail:
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Lefrère JJ, Hewitt P. From mad cows to sensible blood transfusion: the risk of prion transmission by labile blood components in the United Kingdom and in France. Transfusion 2009; 49:797-812. [PMID: 19170997 DOI: 10.1111/j.1537-2995.2008.02044.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transfusion transmission of the prion, the agent of variant Creutzfeldt-Jakob disease (vCJD), is now established. Subjects infected through food may transmit the disease through blood donations. The two nations most affected to date by this threat are the United Kingdom (UK) and France. The first transfusion cases have been observed in the UK over the past 5 years. In France, a few individuals who developed vCJD had a history of blood donation, leading to a risk of transmission to recipients, some of whom could be incubating the disease. In the absence of a large-scale screening test, it is impossible to establish the prevalence of infection in the blood donor population and transfused patients. This lack of a test also prevents specific screening of blood donations. Thus, prevention of transfusion transmission essentially relies at present on deferral of "at-risk" individuals. Because prions are present in both white blood cells and plasma, leukoreduction is probably insufficient to totally eliminate the transfusion risk. In the absence of a screening test for blood donations, recently developed prion-specific filters could be a solution. Furthermore, while the dietary spread of vCJD seems efficiently controlled, uncertainty remains as to the extent of the spread of prions through blood transfusion and other secondary routes.
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Lefrère JJ. [The risk of prion contamination through the transfusion of cellular products]. Transfus Clin Biol 2007; 14:25-34. [PMID: 17499536 DOI: 10.1016/j.tracli.2007.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Since the publication of observations of variant Creutzfeld-Jacob disease (vCJD) having occurred in the UK due to transfusion of infected packed red cells, the risk of vCJD transmission by blood transfusion is established. In France, no such case has yet been reported, but among the French vCJD cases observed, three individuals, having entered the disease in 2004, are past blood donors. Thus, some individuals transfused in their past are at risk of developing a vCJD. The lack of available assay prevents the diagnosis of the infection in these recipients and the implementation of a specific screening of blood donations. In the UK and in France, several measures to ensure transfusion safety have been applied to reduce the risk of contamination by the variant.
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Griffin JK, Terry LA, Jackman R, Yousefi M, Cashman NR. Decreased cell surface prion protein in mouse models of prion disease. Neuroreport 2007; 18:1-6. [PMID: 17259851 DOI: 10.1097/01.wnr.0000239967.06438.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Transmissible spongiform encephalopathies are infectious neurodegenerative diseases caused by prions, composed of ordered aggregates of misfolded cellular prion protein. Neural antigen density of prion protein, Thy-1 and glial fibrillary acidic protein was analyzed using flow cytometry of dissociated mouse brain cells after inoculation with mouse-adapted transmissible spongiform encephalopathy agents. Transmissible spongiform encephalopathy gliosis was demonstrated by increased intracellular immunoreactivity for glial fibrillary acidic protein compared with controls. Immunoreactivity for cell surface prion protein was reduced 2.8-3.8-fold compared with control brain cells, whereas surface Thy-1 protein was reduced 1.5-4-fold. Double-staining protocols revealed loss of brain cells highly immunoreactive for prion protein and Thy-1, with a preferential reduction of prion protein, suggesting that prion protein expression, trafficking or consumption may be affected early in disease.
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Affiliation(s)
- Jennifer K Griffin
- Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario, Canada
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Starke R, Mackie I, Drummond O, MacGregor I, Harrison P, Machin S. Prion protein in patients with renal failure. Transfus Med 2006; 16:165-8. [PMID: 16764594 DOI: 10.1111/j.1365-3148.2006.00662.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We previously found elevated levels of prion protein (PrP(C)) in the blood plasma of 16 patients with renal failure. We studied a further 20 patients with renal failure, and all had a significantly higher PrP(C) concentration than healthy normal subjects (P < 0.0001). Renal dialysis did not remove plasma PrP(C) in these patients. Because dialysis patients receive heparin during dialysis, which could potentially bind to PrP(C), the concentration of PrP(C) was measured in patients receiving heparin for cardiopulmonary bypass and was found to be similar to normal controls. We also studied several other groups with chronic illnesses and found that patients with thrombotic thrombocytopenic purpura and sickle cell anaemia had normal plasma PrP(C) levels, but that those with beta-thalassaemia had slightly elevated levels of plasma PrP(C). This suggests that the observations in renal failure were not just part of a generalized response to chronic illness or acute phase reaction. The mechanism of elevated plasma PrP(C) levels in renal disease is unknown, but this shows that plasma PrP(C) is not a specific marker of neurological disease or Creutzfeldt-Jakob disease.
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Affiliation(s)
- R Starke
- Department of Haematology, University College London, London, UK.
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