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Martá-Ariza M, Leitner DF, Kanshin E, Suazo J, Pedrosa AG, Thierry M, Lee EB, Devinsky O, Drummond E, Fortea J, Lleó A, Ueberheide B, Wisniewski T. Comparison of the Amyloid Plaque Proteome in Down Syndrome, Early-Onset Alzheimer's Disease and Late-Onset Alzheimer's Disease. RESEARCH SQUARE 2024:rs.3.rs-4469045. [PMID: 39070643 PMCID: PMC11275979 DOI: 10.21203/rs.3.rs-4469045/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Background Down syndrome (DS) is strongly associated with Alzheimer's disease (AD), attributable to APP overexpression. DS exhibits Amyloid-β (Aβ) and Tau pathology similar to early-onset AD (EOAD) and late-onset AD (LOAD). The study aimed to evaluate the Aβ plaque proteome of DS, EOAD and LOAD. Methods Using unbiased localized proteomics, we analyzed amyloid plaques and adjacent plaque-devoid tissue ('non-plaque') from post-mortem paraffin-embedded tissues in four cohorts (n = 20/group): DS (59.8 ± 4.99 y/o), EOAD (63 ± 4.07 y/o), LOAD (82.1 ± 6.37 y/o) and controls (66.4 ± 13.04). We assessed functional associations using Gene Ontology (GO) enrichment and protein interaction networks. Results We identified differentially abundant Aβ plaque proteins vs. non-plaques (FDR < 5%, fold-change > 1.5) in DS (n = 132), EOAD (n = 192) and in LOAD (n = 128); there were 43 plaque-associated proteins shared between all groups. Positive correlations (p < 0.0001) were observed between plaque-associated proteins in DS and EOAD (R2 = 0.77), DS and LOAD (R2 = 0.73), and EOAD vs. LOAD (R2 = 0.67). Top Biological process (BP) GO terms (p < 0.0001) included lysosomal transport for DS, immune system regulation for EOAD, and lysosome organization for LOAD. Protein networks revealed a plaque enriched signature across all cohorts involving APP metabolism, immune response, and lysosomal functions. In DS, EOAD and LOAD non-plaque vs. control tissue, we identified 263, 269, and 301 differentially abundant proteins, including 65 altered non-plaque proteins across all cohorts. Differentially abundant non-plaque proteins in DS showed a significant (p < 0.0001) but weaker positive correlation with EOAD (R2 = 0.59) and LOAD (R2 = 0.33) compared to the stronger correlation between EOAD and LOAD (R2 = 0.79). The top BP GO term for all groups was chromatin remodeling (DS p = 0.0013, EOAD p = 5.79×10- 9, and LOAD p = 1.69×10- 10). Additional GO terms for DS included extracellular matrix (p = 0.0068), while EOAD and LOAD were associated with protein-DNA complexes and gene expression regulation (p < 0.0001). Conclusions We found strong similarities among the Aβ plaque proteomes in individuals with DS, EOAD and LOAD, and a robust association between the plaque proteomes and lysosomal and immune-related pathways. Further, non-plaque proteomes highlighted altered pathways related to chromatin structure and extracellular matrix (ECM), the latter particularly associated with DS. We identified novel Aβ plaque proteins, which may serve as biomarkers or therapeutic targets.
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Affiliation(s)
| | | | | | | | | | | | - Edward B Lee
- University of Pennsylvania Perelman School of Medicine
| | | | | | - Juan Fortea
- Universitat Autònoma de Barcelona: Universitat Autonoma de Barcelona
| | - Alberto Lleó
- Universitat Autònoma de Barcelona: Universitat Autonoma de Barcelona
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Eto K, Itagaki R, Takamura A, Eto Y, Nagata S. Clinical features of two Japanese siblings of neuronal ceroid lipofuscinosis type 1 (CLN1) complicated with TypeⅡ diabetes mellitus. Mol Genet Metab Rep 2023; 37:101019. [PMID: 38053925 PMCID: PMC10694742 DOI: 10.1016/j.ymgmr.2023.101019] [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: 09/06/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/07/2023] Open
Abstract
Neuronal ceroid lipofuscinosis type1(CLN1), is a one form of the group of neuronal ceroid lipofuscinoses (NCLs), which is a neurodegenerative disorder characterized by progressive psychomotor deterioration, ataxia, epilepsy, and visual impairment. Neurological manifestations occur at a wide range of ages, from infancy to adulthood, but are most common in infancy. The prevalence of CLN1 is unclear; however, it is very rare in Japan and Europe. In Japan, only a few cases have been reported, two of infantile- and one of juvenile-onset type. Nonetheless, the clinical characteristics of Japanese patients and their relationship with the genotype have not been sufficiently investigated. Here, we report the cases of two siblings that presented with juvenile-onset (a 22-year-old man and a 29-year-old woman) CLN1 associated with type II diabetes mellitus. In both cases, visual impairment followed by learning disability was observed from school-age, and retinitis pigmentosa was noted on ophthalmological examination. These patients presented type II diabetes mellitus during their later teenage years. Brain magnetic resonance imaging (MRI) revealed marked atrophy of the cerebrum and cerebellum. The clinical symptoms lead to suspect NCLs. Decreased PPT1 enzyme activity in dried blood spot (DBS)and leukocytes were observed, and the genetic analysis revealed heterozygous missense variants in PPT1, c.550G > A/c.664 A > G (p. Glu184Lys/p. Lys216Glu). The latter variant of this patients was novel variant. The residual enzymatic activity of PPT1 in these cases is higher than that in the infantile type. CLN1 mutant cells are known to have altered subcellular expression and localization, enhanced lipid raft-mediated endocytosis, abnormal autophagy, and mitochondrial dysfunction. Although the prevalence of diabetes mellitus is high and the possibility of coincidental complications cannot be ruled out, we concluded that mitochondrial abnormalities are involved in insulin resistance and may be implicated in the development of type II diabetes mellitus. Further studies are needed to prove the correlation between CLN1 and diabetes mellitus.
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Affiliation(s)
- Kaoru Eto
- Tokyo Women's Medical University, Adachi Medical Center, Department of Pediatrics, Japan
- Tokyo Women's Medical University, Department of Pediatrics, Japan
| | - Rina Itagaki
- Advanced Clinical Research Center & Asian Lysosomal Research Center, Institute of Neurological Disorders, Japan
| | - Ayumi Takamura
- Tottori University Faculty of Medicine, Department of Pathobiological Science and Technology, Japan
| | - Yoshikatsu Eto
- Advanced Clinical Research Center & Asian Lysosomal Research Center, Institute of Neurological Disorders, Japan
| | - Satoru Nagata
- Tokyo Women's Medical University, Department of Pediatrics, Japan
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Gupta SK, Graf T, Edelmann FT, Seelmann H, Reintinger M, Hilringhaus L, Bergmann F, Wiedmann M, Falkenstein R, Wegele H, Yuk IH, Leiss M. A fast and sensitive high-throughput assay to assess polysorbate-degrading hydrolytic activity in biopharmaceuticals. Eur J Pharm Biopharm 2023; 187:120-129. [PMID: 37116764 DOI: 10.1016/j.ejpb.2023.04.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/17/2023] [Accepted: 04/22/2023] [Indexed: 04/30/2023]
Abstract
Hydrolysis of polysorbate in biopharmaceutical products has been ascribed to the enzymatic activity from trace levels of residual host cell proteins. In recent years, significant efforts to identify the causative enzymes typically used elaborate, material-intensive and time-consuming approaches. Therefore, the lack of fast and sensitive assays to monitor their activity remains a major bottleneck for supporting process optimization and troubleshooting activities where time and sample throughput are crucial constraints. To address this bottleneck, we developed a novel Electrochemiluminescence-based Polysorbase Activity (EPA) assay to measure hydrolytic activities in biotherapeutics throughout the drug substance manufacturing process. By combining the favorable features of an in-house designed surrogate substrate with a well-established detection platform, the method yields fast (∼36 h turnaround time) and highly sensitive readouts compatible with high-throughput testing. The assay capability for detecting substrate conversion in a precise and reliable manner was demonstrated by extensive qualification studies and by employing a number of recombinant hydrolases associated with polysorbate hydrolysis. In addition, high assay sensitivity and wide applicability were confirmed for in-process pool samples of three different antibody products by performing a head-to-head comparison between this method and an established liquid chromatography - mass spectrometry based assay for the quantification of free fatty acids. Overall, our results suggest that this new approach is well-suited to resolve differences in hydrolytic activity through all stages of purification.
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Affiliation(s)
- Sanjay K Gupta
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Tobias Graf
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Franziska T Edelmann
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Helen Seelmann
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Markus Reintinger
- Reagent Research and Design, Roche Diagnostics GmbH, Nonnenwald 2, Penzberg 82377, Germany
| | - Lars Hilringhaus
- Reagent Research and Design, Roche Diagnostics GmbH, Nonnenwald 2, Penzberg 82377, Germany
| | - Frank Bergmann
- Reagent Research and Design, Roche Diagnostics GmbH, Nonnenwald 2, Penzberg 82377, Germany
| | - Michael Wiedmann
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Roberto Falkenstein
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Harald Wegele
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany
| | - Inn H Yuk
- Pharma Technical Development, Genentech, 1 DNA Way, South San Francisco, California, USA
| | - Michael Leiss
- Pharma Technical Development, Roche Diagnostics GmbH, Nonnenwald 2, 82377 Penzberg, Germany.
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Rodrigues D, de Castro MJ, Crujeiras P, Duat-Rodriguez A, Marco AV, Del Toro M, Couce ML, Colón C. The LINCE Project: A Pathway for Diagnosing NCL2 Disease. Front Pediatr 2022; 10:876688. [PMID: 35425725 PMCID: PMC9002010 DOI: 10.3389/fped.2022.876688] [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: 02/15/2022] [Accepted: 03/07/2022] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Neuronal Ceroid Lipofuscinosis (NCL) comprises a clinically and genetically heterogeneous group of 13 neurodegenerative lysosomal storage disorders. Neuronal Ceroid lipofuscinosis type 2 disease (NCL2), caused by the deficient lysosomal enzyme tripeptidyl peptidase 1 (TPP1), is the only one with an approved enzyme replacement treatment (ERT). Early initiation of ERT appears to modify significantly the natural history of the disease. We aimed to shorten the time to diagnosis of NCL2. METHODS In March 2017, we started per first time in Spain a selective screening program, the LINCE project, in pediatric patients with clinical symptoms compatible with NCL2 disease. The program covered the whole country. We distributed kits to pediatricians with the necessary material to assess patients. All samples in this study were received within one week of collection. Enzymatic activity determined on dried blood spots was the main method used to screen for TPP1 and palmitoyl protein thioesterase 1 (PPT1) for the differential diagnosis with neuronal ceroid lipofuscinosis type 1 (NCL1). RESULTS Over a period of three years, we received 71 samples. The analysis was minimally invasive, relatively cheap and fast-executing. Three cases identified as a direct result of the selective screening strategy were confirmed by genetic study of NCL2 disease with a median age of 4.5 years. Our screening method has a specificity of 100%, and, with the absence to date of false negatives. We did not detect any NCL1-positive cases. CONCLUSIONS LINCE proved to be a simple, useful, and reliable tool for the diagnosis of NCL2, enabling clinicians to diagnose NCL2 faster. The presence of NCL2-positive cases in our population and availability of treatment may facilitate the inclusion of NCL2 in neonatal screening programs for early diagnosis.
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Affiliation(s)
- Daniel Rodrigues
- Congenital Metabolic Diseases Unit, Department of Neonatology, University Clinical Hospital of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), European Reference Network for Hereditary Metabolic Disorders (MetabERN), Centro de Investigación Biomédica en Red Enfermedades Raras (CIBERER), Santiago de Compostela, Spain.,Department of Pediatrics, Faculty of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Maria José de Castro
- Congenital Metabolic Diseases Unit, Department of Neonatology, University Clinical Hospital of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), European Reference Network for Hereditary Metabolic Disorders (MetabERN), Centro de Investigación Biomédica en Red Enfermedades Raras (CIBERER), Santiago de Compostela, Spain
| | - Pablo Crujeiras
- Congenital Metabolic Diseases Unit, Department of Neonatology, University Clinical Hospital of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), European Reference Network for Hereditary Metabolic Disorders (MetabERN), Centro de Investigación Biomédica en Red Enfermedades Raras (CIBERER), Santiago de Compostela, Spain.,Department of Pediatrics, Faculty of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Anna Duat-Rodriguez
- Department of Neuropediatrics, Niño Jesús Children's Hospital, Madrid, Spain
| | - Ana Victoria Marco
- Genomics Unit, La Fe University and Polytechnic Hospital, Valencia, Spain
| | - Mireia Del Toro
- Pediatric Neurology Unit, Vall D'Hebron University Hospital, Barcelona, Spain
| | - María L Couce
- Congenital Metabolic Diseases Unit, Department of Neonatology, University Clinical Hospital of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), European Reference Network for Hereditary Metabolic Disorders (MetabERN), Centro de Investigación Biomédica en Red Enfermedades Raras (CIBERER), Santiago de Compostela, Spain.,Department of Pediatrics, Faculty of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Cristóbal Colón
- Congenital Metabolic Diseases Unit, Department of Neonatology, University Clinical Hospital of Santiago de Compostela, Instituto de Investigación Sanitaria de Santiago (IDIS), European Reference Network for Hereditary Metabolic Disorders (MetabERN), Centro de Investigación Biomédica en Red Enfermedades Raras (CIBERER), Santiago de Compostela, Spain
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Diagnosis of late-infantile neuronal ceroid lipofuscinosis using dried blood spot-based assay for TPPI enzyme activity: TPPI diagnostic assay from DBS. Clin Chim Acta 2020; 507:62-68. [PMID: 32298681 DOI: 10.1016/j.cca.2020.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND The neuronal ceroid lipofuscinosis 2 (NCL2) or classic late-infantile neuronal ceroid lipofuscinosis (LINCL) is a neurogenetic disorder caused by mutations in the TPPI gene, which codes for the lysosomal tripeptidyl peptidase 1 (TPPI) EC 3.4.14.9. Loss of functional TPPI activity results in progressive visual and neurological symptoms starting at around 1-2 years of age causing early death. METHODS We report a DBS-based TPPI assay that cleaves a synthetic tetrapeptide substrate generating a product that is detected by HPLC. Probands and carriers were identified with 100% accuracy (7 probands, 30 carriers, 13 controls). RESULTS The assay detected a single TPPI activity at a lower pH towards the substrate tested. TPPI activity measurable when extracted at lower pH while inactive at neutral pH showed steady increase for at least 8 h incubation. No loss in TPPI activity was observed when DBS were stored for at least 2 weeks either in freezer, refrigerator, room temperature or 42 °C. CONCLUSION A sequence variant causing Arg339Gln substitution in a proband had 12% TPPI. TPPI activity can be reliably measured in DBS, giving an opportunity to diagnose NCL2 at birth and refer patients for enzyme replacement or other therapies for earliest intervention, or alternatively offers a second-tier confirmatory test.
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Hess-Homeier DL, Cunniff C, Grinspan ZM. Priorities for Newborn Screening of Genetic Epilepsy. Pediatr Neurol 2019; 101:83-85. [PMID: 31570297 DOI: 10.1016/j.pediatrneurol.2019.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 07/16/2019] [Accepted: 07/21/2019] [Indexed: 10/26/2022]
Affiliation(s)
| | - Christopher Cunniff
- Weill Cornell Medical College, New York, New York; Department of Pediatrics, Weill Cornell Medicine, New York, New York; NewYork-Presbyterian Hospital, New York, New York
| | - Zachary M Grinspan
- Weill Cornell Medical College, New York, New York; Department of Pediatrics, Weill Cornell Medicine, New York, New York; Department of Healthcare Policy & Research, Weill Cornell Medicine, New York, New York; NewYork-Presbyterian Hospital, New York, New York.
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Aladeokin AC, Akiyama T, Kimura A, Kimura Y, Takahashi-Jitsuki A, Nakamura H, Makihara H, Masukawa D, Nakabayashi J, Hirano H, Nakamura F, Saito T, Saido T, Goshima Y. Network-guided analysis of hippocampal proteome identifies novel proteins that colocalize with Aβ in a mice model of early-stage Alzheimer’s disease. Neurobiol Dis 2019; 132:104603. [DOI: 10.1016/j.nbd.2019.104603] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 07/12/2019] [Accepted: 09/02/2019] [Indexed: 12/14/2022] Open
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Khaledi H, Liu Y, Masi S, Gelb MH. Detection of Infantile Batten Disease by Tandem Mass Spectrometry Assay of PPT1 Enzyme Activity in Dried Blood Spots. Anal Chem 2018; 90:12168-12171. [PMID: 30204428 DOI: 10.1021/acs.analchem.8b03188] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new tandem mass spectrometry (MS/MS)-based approach for measurement of the enzymatic activity of palmitoyl protein thioesterase I (PPT1) in dried blood spots (DBS) is presented. Deficiency in this enzyme leads to infantile neuronal ceroid lipofuscinosis (INCL, Infantile Batten disease, CLN1). The assay could distinguish between 80 healthy newborns and three previously diagnosed INCL patients. Unlike the fluorimetric PPT1 assay, the MS/MS assay does not require recombinant β-glucosidase. Furthermore, the assay could be easily combined with a TPP1 enzyme assay (for CLN2 disease) and can be potentially multiplexed with a large panel of additional lysosomal enzyme assays by MS/MS for newborn screening and postscreening analysis.
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Affiliation(s)
- Hamid Khaledi
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Yang Liu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Sophia Masi
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Michael H Gelb
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
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