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Costa-Rodrigues D, Leite JP, Saraiva MJ, Almeida MR, Gales L. Transthyretin monomers: a new plasma biomarker for pre-symptomatic transthyretin-related amyloidosis. Amyloid 2024:1-7. [PMID: 38946492 DOI: 10.1080/13506129.2024.2368860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 06/12/2024] [Indexed: 07/02/2024]
Abstract
BACKGROUND Genotyping and amyloid fibril detection in tissues are generally considered the diagnostic gold standard in transthyretin-related amyloidosis. Patients carry less stable TTR homotetramers prone to dissociation into non-native monomers, which rapidly self-assemble into oligomers and, ultimately, amyloid fibrils. Thus, the initial event of the amyloid cascade produces the smallest transthyretin species: the monomers. This creates engineering opportunities for diagnosis that remain unexplored. METHODS We hypothesise that molecular sieving represents a promising method for isolating and concentrating trace TTR monomers from the tetramers present in plasma samples. Subsequently, immunodetection can be utilised to distinguish monomeric TTR from other low molecular weight proteins within the adsorbed fraction. A two-step assay was devised (ImmunoSieve assay), combining molecular sieving and immunodetection for sensing monomeric transthyretin. This assay was employed to analyse plasma microsamples from 10 individuals, including 5 pre-symptomatic carriers of TTR-V30M, the most prevalent amyloidosis-associated TTR variant worldwide, and 5 healthy controls. RESULTS The ImmunoSieve assay enable sensitive detection of monomeric transthyretin in plasma microsamples. Moreover, the circulating monomeric TTR levels were significantly higher in carriers of amyloidogenic TTR mutation. CONCLUSIONS Monomeric TTR can function as a biomarker for evaluating disease progression and assessing responses to therapies targeted at stabilising native TTR.
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Affiliation(s)
- Diogo Costa-Rodrigues
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Portugal
| | - José P Leite
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Portugal
| | - Maria João Saraiva
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Portugal
| | - Maria Rosário Almeida
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Portugal
| | - Luís Gales
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Portugal
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Aduriz-Arrizabalaga J, Mercero JM, De Sancho D, Lopez X. Rules governing metal coordination in Aβ-Zn(II) complex models from quantum mechanical calculations. Phys Chem Chem Phys 2023; 25:27618-27627. [PMID: 37811710 DOI: 10.1039/d3cp02070c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Transition metals directly contribute to the neurotoxicity of the aggregates of the amyloid-forming Aβ peptide. The understanding and rationalization of the coordination modes of metals to Aβ amyloid is, therefore, of paramount importance to understand the capacity of a given metal to promote peptide aggregation. Experimentally, multiple Aβ-metal structures have been resolved, which exhibit different modes of coordination in both the monomeric and oligomeric forms of Aβ. Although Zn(II) metalloproteins are very abundant and often involve cysteine residues in the first coordination shell, in the case of Aβ-Zn(II), though, Zn(II) is coordinated by glutamic/aspartic acid and/or histidine residues exclusively, making for an interesting case study. Here we present a systematic analysis of the underlying chemistry on Aβ-Zn(II) coordination, where relative stabilities of different coordination arrangements indicate that a mixture of Glu/Asp and His residues is favored. A detailed comparison between different coordination shell geometries shows that tetrahedral coordination is generally favored in the aqueous phase. Our calculations show an interplay between dative covalent interactions and electrostatics which explains the observed trends. Multiple structures deposited in the Protein Data Bank support our findings, suggesting that the trends found in our work may be transferable to other Zn(II) metalloproteins with this type of coordination.
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Affiliation(s)
- Julen Aduriz-Arrizabalaga
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, UPV/EHU & Donostia International Physics Center (DIPC), PK 1072, 20018 Donostia-San Sebastian, Euskadi, Spain.
| | - Jose M Mercero
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, UPV/EHU & Donostia International Physics Center (DIPC), PK 1072, 20018 Donostia-San Sebastian, Euskadi, Spain.
| | - David De Sancho
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, UPV/EHU & Donostia International Physics Center (DIPC), PK 1072, 20018 Donostia-San Sebastian, Euskadi, Spain.
| | - Xabier Lopez
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, UPV/EHU & Donostia International Physics Center (DIPC), PK 1072, 20018 Donostia-San Sebastian, Euskadi, Spain.
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Li X, Zhang Q, Jian H, Bai S. Chiral implications on Fmoc-dipeptide self-assembly and catalytic kinetics of thermolysin. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Leite JP, Lete MG, Fowler SB, Gimeno A, Rocha JF, Sousa SF, Webster CI, Jiménez-Bar̀bero JJ, Gales L. Aβ 31-35 Decreases Neprilysin-Mediated Alzheimer's Amyloid-β Peptide Degradation. ACS Chem Neurosci 2021; 12:3708-3718. [PMID: 34505762 DOI: 10.1021/acschemneuro.1c00432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Alzheimer's disease is associated with the deposition of extracellular senile plaques, made primarily of amyloid-β (Aβ), particularly peptides Aβ1-42 and Aβ1-40. Neprilysin, or neutral endopeptidase (NEP), catalyzes proteolysis of the amyloid peptides (Aβ) and is recognized as one of the major regulators of the levels of these peptides in the brain, preventing Aβ accumulation and plaque formation. Here, we used a combination of techniques to elucidate the mechanism of Aβ binding and cleavage by NEP. Our findings indicate that the Aβ31-X cleavage products remain bound to the neprilysin active site, reducing proteolytic activity. Interestingly, it was already shown that this Aβ31-35 sequence is also critical for recognition of Aβ peptides by other targets, such as the serpin-enzyme complex receptor in neuronal cells.
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Affiliation(s)
- José P. Leite
- i3S—Instituto de Investigação e Inovação em Saúde, Rua Alfredo Allen, 208, Porto 4200-135, Portugal
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, Porto 4200-135, Portugal
- Programa Doutoral em Biologia Molecular e Celular (MCbiology), ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Rua de Jorge Viterbo Ferreira 228, Porto 4050-313, Portugal
- ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Marta G. Lete
- CIC bioGUNE, Bizkaia Technology Park, Building 801A, Derio 48170, Spain
| | - Susan B. Fowler
- Antibody Discovery & Protein Engineering R&D, AstraZeneca, Cambridge CB21 6GH, U.K
| | - Ana Gimeno
- CIC bioGUNE, Bizkaia Technology Park, Building 801A, Derio 48170, Spain
| | - Juliana F. Rocha
- UCIBIO/REQUIMTE, BioSIM-Department of Biomedicine, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, Porto 4200-319, Portugal
| | - Sérgio F. Sousa
- UCIBIO/REQUIMTE, BioSIM-Department of Biomedicine, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, Porto 4200-319, Portugal
| | - Carl I. Webster
- Antibody Discovery & Protein Engineering R&D, AstraZeneca, Cambridge CB21 6GH, U.K
| | - Jesús J. Jiménez-Bar̀bero
- CIC bioGUNE, Bizkaia Technology Park, Building 801A, Derio 48170, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48013, Spain
- Department of Organic Chemistry II, Faculty of Science and Technology, UPV-EHU, 48940 Leioa, Spain
| | - Luís Gales
- i3S—Instituto de Investigação e Inovação em Saúde, Rua Alfredo Allen, 208, Porto 4200-135, Portugal
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, Porto 4200-135, Portugal
- ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
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Udayan S, Sherin DR, Vijaykumar S, Manojkumar TK, Nampoori VPN, Thomas S. Exploring the LDS 821 dye as a potential NIR probe for the two photon imaging of amyloid fibrils. Biomater Sci 2020; 8:6082-6092. [PMID: 33000782 DOI: 10.1039/d0bm00548g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report a commercially available benzothiazolium based dye LDS 821 (Styryl 9M) as a near infrared fluorescent probe for the detection of lysozyme amyloid fibrils. Change in the photophysical properties of the dye with respect to the change in viscosity of the environment is investigated. Increment in fluorescence lifetime and quantum yield with increment in viscosity proves the dye as a molecular rotor. The dye, upon binding with lysozyme fibrils, exhibits a red shift in the absorption spectrum with increased quantum yield. Strong fluorescence emission near the biological window as compared with Thioflavin T makes the LDS 821 dye a potential probe for imaging amyloid fibrils in vivo. Molecular docking studies were carried out to understand the mode of interaction between the dye and amyloid fibrils. Nonlinear optical properties of the dye upon incorporation with amyloid fibrils were explored, and they show a sizeable enhancement in two photon absorption with an increase in the concentration of amyloid fibrils. The findings suggest that the nonlinear optical absorption of the LDS 821 dye can be used as an alternative marker for amyloid fibrils.
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Affiliation(s)
- Sony Udayan
- International School of photonics, Cochin University of Science and Technology, Cochin, Kerala, India.
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Arora H, Ramesh M, Rajasekhar K, Govindaraju T. Molecular Tools to Detect Alloforms of Aβ and Tau: Implications for Multiplexing and Multimodal Diagnosis of Alzheimer’s Disease. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190356] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Harshit Arora
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru 560064, Karnataka, India
| | - Madhu Ramesh
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru 560064, Karnataka, India
| | - Kolla Rajasekhar
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru 560064, Karnataka, India
| | - Thimmaiah Govindaraju
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru 560064, Karnataka, India
- VNIR Biotechnologies Pvt. Ltd., Bangalore Bioinnovation Center, Helix Biotech Park, Electronic City Phase I, Bengaluru 560100, Karnataka, India
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Nanowired delivery of cerebrolysin with neprilysin and p-Tau antibodies induces superior neuroprotection in Alzheimer's disease. PROGRESS IN BRAIN RESEARCH 2019; 245:145-200. [DOI: 10.1016/bs.pbr.2019.03.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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