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Martín-Saco G, Tristancho A, Arias A, Ferrer I, Milagro A, García-Lechuz JM. Mycoplasma genitalium and sexually transmitted infections: evidences and figures in a tertiary hospital. Rev Esp Quimioter 2022; 35:76-79. [PMID: 34915694 PMCID: PMC8790635 DOI: 10.37201/req/091.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Introduction Mycoplasma genitalium is an emerging cause of sexually transmitted infections (STIs) and has been implicated in non-gonococcal urethritis in men and cervicitis in woman. The aim of this study is determinate the incidence and pathogenicity of M. genitalium within the diagnosis of STIs detected from clinical samples in a third level hospital. Material and methods A total of 8,473 samples from endocervix, urethra, vagina, rectum and others were processed applying Allpex STI Essential Assay. More than 190 records were reviewed to determinate M. genitalium pathogenicity. Results M. genitalium was detected in a rate 2.8%. Co-infections were detected in 20% of the patients. Conclusions M. genitalium is considered a STI emerging pathogen thanks to the renewal of multiplex-PCR tests although with a low incidence in our approach. Emerging from our experience and the institutional recommendations both detection of acid nucleic techniques (NAATs) and gonococcal culture might be implemented accurately and coexist to adequate prescriptions.
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Affiliation(s)
| | | | | | | | | | - J M García-Lechuz
- Juan M. García-Lechuz Moya, Servicio de Microbiología. Paseo Isabel La Católica 1-4, Hospital Universitario Miguel Servet, Zaragoza 50006. Spain.
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2
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Matamoros-Angles A, Hervera A, Soriano J, Martí E, Carulla P, Llorens F, Nuvolone M, Aguzzi A, Ferrer I, Gruart A, Delgado-García JM, Del Río JA. Analysis of co-isogenic prion protein deficient mice reveals behavioral deficits, learning impairment, and enhanced hippocampal excitability. BMC Biol 2022; 20:17. [PMID: 35027047 PMCID: PMC8759182 DOI: 10.1186/s12915-021-01203-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 12/02/2021] [Indexed: 12/22/2022] Open
Abstract
Background Cellular prion protein (PrPC) is a cell surface GPI-anchored protein, usually known for its role in the pathogenesis of human and animal prionopathies. However, increasing knowledge about the participation of PrPC in prion pathogenesis contrasts with puzzling data regarding its natural physiological role. PrPC is expressed in a number of tissues, including at high levels in the nervous system, especially in neurons and glial cells, and while previous studies have established a neuroprotective role, conflicting evidence for a synaptic function has revealed both reduced and enhanced long-term potentiation, and variable observations on memory, learning, and behavior. Such evidence has been confounded by the absence of an appropriate knock-out mouse model to dissect the biological relevance of PrPC, with some functions recently shown to be misattributed to PrPC due to the presence of genetic artifacts in mouse models. Here we elucidate the role of PrPC in the hippocampal circuitry and its related functions, such as learning and memory, using a recently available strictly co-isogenic Prnp0/0 mouse model (PrnpZH3/ZH3). Results We performed behavioral and operant conditioning tests to evaluate memory and learning capabilities, with results showing decreased motility, impaired operant conditioning learning, and anxiety-related behavior in PrnpZH3/ZH3 animals. We also carried in vivo electrophysiological recordings on CA3-CA1 synapses in living behaving mice and monitored spontaneous neuronal firing and network formation in primary neuronal cultures of PrnpZH3/ZH3 vs wildtype mice. PrPC absence enhanced susceptibility to high-intensity stimulations and kainate-induced seizures. However, long-term potentiation (LTP) was not enhanced in the PrnpZH3/ZH3 hippocampus. In addition, we observed a delay in neuronal maturation and network formation in PrnpZH3/ZH3 cultures. Conclusion Our results demonstrate that PrPC promotes neuronal network formation and connectivity. PrPC mediates synaptic function and protects the synapse from excitotoxic insults. Its deletion may underlie an epileptogenic-susceptible brain that fails to perform highly cognitive-demanding tasks such as associative learning and anxiety-like behaviors. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01203-0.
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Affiliation(s)
- A Matamoros-Angles
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Hervera
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - J Soriano
- Departament de Física de la Materia Condensada, University of Barcelona, Barcelona, Spain.,Institute of Complex Systems (UBICS), University of Barcelona, Barcelona, Spain
| | - E Martí
- Department of Biomedicine, University of Barcelona, Barcelona, Spain.,Bioinformatics and Genomics, Center for Genomic Regulation, Barcelona, Spain
| | - P Carulla
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain
| | - F Llorens
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Department of Neurology, University Medical School, Göttingen, Germany.,Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Catalonia, Spain
| | - M Nuvolone
- Institute of Neuropathology, University Hospital of Zürich, Zürich, Switzerland.,Amyloidosis Center, Foundation IRCCS Policlinico San Matteo, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - A Aguzzi
- Institute of Neuropathology, University Hospital of Zürich, Zürich, Switzerland
| | - I Ferrer
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Senior Consultant, Bellvitge University Hospital, IDIBELL (Bellvitge Biomedical Research Centre), L'Hospitalet de Llobregat, Spain.,Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain
| | - A Gruart
- Division of Neurosciences, Pablo de Olavide University, 41013, Seville, Spain
| | - J M Delgado-García
- Division of Neurosciences, Pablo de Olavide University, 41013, Seville, Spain.
| | - J A Del Río
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Parc Científic de Barcelona, Barcelona, Spain. .,Department of Cell Biology, Physiology, and Immunology, University of Barcelona, Barcelona, Spain. .,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain. .,Institute of Neuroscience, University of Barcelona, Barcelona, Spain.
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3
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Turin TC, Naeem I, Nurul A, Vaska M, Goopy S, Rashid R, Kassan A, Aghajafari F, Ferrer I, Kazi A, Sadi I, O'Beirne M, Leduc C. Community-based Health Data Cooperatives Towards Improving the Immigrant Community Health: A Scoping Review to Inform Policy and Practice. Int J Popul Data Sci 2020; 5:1158. [PMID: 32935058 PMCID: PMC7473268 DOI: 10.23889/ijpds.v5i1.1158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background In the case of immigrant health and wellness, data are the key limiting factor, where comprehensive national knowledge on immigrant health and health service utilisation is limited. New data and data silos are an inherent response to the increase in technology in the collection and storage of data. The Health Data Cooperative (HDC) model allows members to contribute, store, and manage their health-related information, and members are the rightful data owners and decision-makers to data sharing (e g. research communities, commercial entities, government bodies). Objective This review attempts to scope the literature on HDC and fulfill the following objectives: 1) identify and describe the type of literature that is available on the HDC model; 2) describe the key themes related to HDCs; and 3) describe the benefits and challenges related to the HDC model. Methods We conducted a scoping review using the five-stage framework outlined by Arskey and O’Malley to systematically map literature on HDCs using two search streams: 1) a database and grey literature search; and 2) an internet search. We included all English records that discussed health data cooperative and related key terms. We used a thematic analysis to collate information into comprehensive themes. Results Through a comprehensive screening process, we found 22 database and grey literature records, and 13 Internet search records. Three major themes that are important to stakeholders include data ownership, data security, and data flow and infrastructure. Conclusions The results of this study are an informative first step to the study of the HDC model, or an establishment of a HDC in immigrant communities. Key words community health, health data, cooperative, and citizen data empowermen
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Affiliation(s)
- T C Turin
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
| | - I Naeem
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Akmn Nurul
- Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Economics, University of Calgary, Calgary, Alberta, Canada
| | - M Vaska
- Tom Baker Cancer Centre, Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada
| | - S Goopy
- Faculty of Nursing, University of Calgary, Calgary, Alberta, Canada
| | - R Rashid
- Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
| | - A Kassan
- Werklund School of Education, University of Calgary, Calgary, Alberta, Canada
| | - F Aghajafari
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - I Ferrer
- Faculty of Social Work, University of Calgary, Calgary, Alberta, Canada
| | - A Kazi
- Citizen Researcher, Calgary, Alberta, Canada
| | - I Sadi
- Citizen Researcher, Calgary, Alberta, Canada
| | - M O'Beirne
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
| | - C Leduc
- Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada
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Ferrer I, Andrés-Benito P. White matter alterations in Alzheimer's disease without concomitant pathologies. Neuropathol Appl Neurobiol 2020; 46:654-672. [PMID: 32255227 PMCID: PMC7754505 DOI: 10.1111/nan.12618] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 03/23/2020] [Indexed: 12/14/2022]
Abstract
Aims Most individuals with AD neuropathological changes have co‐morbidities which have an impact on the integrity of the WM. This study analyses oligodendrocyte and myelin markers in the frontal WM in a series of AD cases without clinical or pathological co‐morbidities. Methods From a consecutive autopsy series, 206 cases had neuropathological changes of AD; among them, only 33 were AD without co‐morbidities. WM alterations were first evaluated in coronal sections of the frontal lobe in every case. Then, RT‐qPCR and immunohistochemistry were carried out in the frontal WM of AD cases without co‐morbidities to analyse the expression of selected oligodendrocyte and myelin markers. Results WM demyelination was more marked in AD with co‐morbidities when compared with AD cases without co‐morbidities. Regarding the later, mRNA expression levels of MBP, PLP1, CNP, MAG, MAL, MOG and MOBP were preserved at stages I–II/0–A when compared with middle‐aged (MA) individuals, but significantly decreased at stages III–IV/0–C. This was accompanied by reduced expression of NG2 and PDGFRA mRNA, reduced numbers of NG2‐, Olig2‐ and HDAC2‐immunoreactive cells and reduced glucose transporter immunoreactivity. Partial recovery of some of these markers occurred at stages V–VI/B–C. Conclusions The present observations demonstrate that co‐morbidities have an impact on WM integrity in the elderly and in AD, and that early alterations in oligodendrocytes and transcription of genes linked to myelin proteins in WM occur in AD cases without co‐morbidities. These are followed by partial recovery attempts at advanced stages. These observations suggest that oligodendrocytopathy is part of AD.
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Affiliation(s)
- I Ferrer
- Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain.,Bellvitge University Hospital, Barcelona, Spain.,Ministry of Economy and Competitiveness, CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Institute of Neurosciences, University of Barcelona, Barcelona, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - P Andrés-Benito
- Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain.,Ministry of Economy and Competitiveness, CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
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5
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Garrido-Martin E, Ramos-Paradas J, Hernandez Prieto S, Sanchez E, Rosado A, Caniego-Casas T, Carrizo N, Enguita A, Muñoz-Jiménez M, Rodriguez B, Perez-Gonzalez U, Gomez Sanchez D, Ferrer I, Ponce Aix S, Nuñez Buiza A, Garrido P, Palacios J, Lopez-Rios F, Paz-Ares L. Harmonization study of tumour mutational burden determination in non-small cell lung cancer (NSCLC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz394.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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6
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Llorens F, Villar-Piqué A, Schmitz M, Diaz-Lucena D, Wohlhage M, Hermann P, Goebel S, Schmidt I, Glatzel M, Hauw JJ, Sikorska B, Liberski PP, Riggert J, Ferrer I, Zerr I. Plasma total prion protein as a potential biomarker for neurodegenerative dementia: diagnostic accuracy in the spectrum of prion diseases. Neuropathol Appl Neurobiol 2019; 46:240-254. [PMID: 31216593 DOI: 10.1111/nan.12573] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 06/12/2019] [Indexed: 12/11/2022]
Abstract
AIMS In the search for blood-based biomarkers of neurodegenerative diseases, we characterized the concentration of total prion protein (t-PrP) in the plasma of neurodegenerative dementias. We aimed to assess its accuracy in this differential diagnostic context. METHODS Plasma t-PrP was measured in 520 individuals including healthy controls (HC) and patients diagnosed with neurological disease control (ND), Alzheimer's disease (AD), sporadic Creutzfeldt-Jakob disease (sCJD), frontotemporal dementia (FTD), Lewy body dementia (LBD) and vascular dementia (VaD). Additionally, t-PrP was quantified in genetic prion diseases and iatrogenic CJD. The accuracy of t-PrP discriminating the diagnostic groups was evaluated and correlated with demographic, genetic and clinical data in prion diseases. Markers of blood-brain barrier impairment were investigated in sCJD brains. RESULTS Compared to HC and ND, elevated plasma t-PrP concentrations were detected in sCJD, followed by FTD, AD, VaD and LBD. In sCJD, t-PrP was associated neither with age nor sex, but with codon 129 PRNP genotype. Plasma t-PrP concentrations correlated with cerebrospinal fluid (CSF) markers of neuro-axonal damage, but not with CSF t-PrP. In genetic prion diseases, plasma t-PrP was elevated in all type of mutations investigated. In sCJD brain tissue, extravasation of immunoglobulin G and the presence of swollen astrocytic end-feet around the vessels suggested leakage of blood-brain barrier as a potential source of increased plasma t-PrP. CONCLUSIONS Plasma t-PrP is elevated in prion diseases regardless of aetiology. This pilot study opens the possibility to consider plasma t-PrP as a promising blood-based biomarker in the diagnostic of prion disease.
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Affiliation(s)
- F Llorens
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain.,Department of Neurology, University Medical School, Göttingen, Germany
| | - A Villar-Piqué
- Department of Neurology, University Medical School, Göttingen, Germany
| | - M Schmitz
- Department of Neurology, University Medical School, Göttingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - D Diaz-Lucena
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain
| | - M Wohlhage
- Department of Neurology, University Medical School, Göttingen, Germany
| | - P Hermann
- Department of Neurology, University Medical School, Göttingen, Germany
| | - S Goebel
- Department of Neurology, University Medical School, Göttingen, Germany
| | - I Schmidt
- Department of Neurology, University Medical School, Göttingen, Germany
| | - M Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - J-J Hauw
- Centre national de référence des ATNC, Paris, France
| | - B Sikorska
- Department of Molecular Pathology and Neuropathology, Medical University of Lodz, Lodz, Poland
| | - P P Liberski
- Department of Molecular Pathology and Neuropathology, Medical University of Lodz, Lodz, Poland
| | - J Riggert
- Department of Transfusion Medicine, University Medical School, Göttingen, Germany
| | - I Ferrer
- Network Center for Biomedical Research in Neurodegenerative Diseases, (CIBERNED), Institute Carlos III, Ministry of Health, Hospitalet de Llobregat, Spain.,Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Spain.,Department of Pathology and Experimental Therapeutics, Faculty of Medicine, University of Barcelona, Barcelona, Spain
| | - I Zerr
- Department of Neurology, University Medical School, Göttingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
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Peña-Bautista C, Baquero M, Ferrer I, Hervás D, Vento M, García-Blanco A, Cháfer-Pericás C. Neuropsychological assessment and cortisol levels in biofluids from early Alzheimer's disease patients. Exp Gerontol 2019; 123:10-16. [PMID: 31117002 DOI: 10.1016/j.exger.2019.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/18/2019] [Accepted: 05/17/2019] [Indexed: 12/12/2022]
Abstract
Cortisol dysregulation is proposed as a factor in the development of Alzheimer's disease (AD). AD patients can show high cortisol levels in prodromal phases of AD, early enough that neuropsychological alterations exist but activities of daily living remain unimpaired. Nevertheless, it is unknown if biofluid cortisol levels can have some AD predictive power together with neuropsychological assessment in prodromal stages in comparison with other cognitive disorders. In this work, an analytical method based on ultra-performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) was applied to determine the cortisol levels in different biofluids (urine, plasma, saliva, cerebrospinal fluid). Early AD patients and non-AD patients recruited at out-patient neurological unit were classified from the standard cerebrospinal fluid biomarkers levels (β-amyloid, tau, phosphorylated tau), and studied with an extensive neuropsychological assessment including global, neuropsychological, functional and affective scales. We used a logistic regression model to discriminate between the AD and non-AD groups. Higher plasma cortisol levels were found in the AD group than in the non-AD group (p < 0.001). Regarding neuropsychological evaluation, delayed memory was used as representative of the neuropsychological status, and lower scores were obtained in the AD group (p < 0.001). The prediction model, including plasma cortisol levels and delayed memory scores, achieved an AUC of 0.93, as well as a sensitivity of 97% and a specificity of 69.4%. In conclusion, plasma cortisol levels and delayed memory scores were specifically impaired in early AD, allowing the development of a new diagnostic model which could be employed as a very satisfactory screening system.
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Affiliation(s)
- C Peña-Bautista
- Neonatal Research Unit, Health Research Institute La Fe, Valencia, Spain
| | - M Baquero
- Neurology Unit, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - I Ferrer
- Neurology Unit, University and Polytechnic Hospital La Fe, Valencia, Spain
| | - D Hervás
- Biostatistical Unit Platform, Health Research Institute La Fe, Valencia, Spain
| | - M Vento
- Neonatal Research Unit, Health Research Institute La Fe, Valencia, Spain
| | - A García-Blanco
- Neonatal Research Unit, Health Research Institute La Fe, Valencia, Spain.
| | - C Cháfer-Pericás
- Neonatal Research Unit, Health Research Institute La Fe, Valencia, Spain.
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Ferrer I, Vives-Mestres M, Manresa A, Garcia-Romeu ML. Replicability of Ultrasonic Molding for Processing Thin-Wall Polystyrene Plates with a Microchannel. Materials (Basel) 2018; 11:E1320. [PMID: 30061545 PMCID: PMC6117798 DOI: 10.3390/ma11081320] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 11/17/2022]
Abstract
Ultrasonic molding is a new technology for processing small and micro polymeric components with reasonable cost and energy savings when small and medium batch sizes are required. However, when microcomponents are manufactured, the replicability of different micro features has to be guaranteed. The aim is to investigate the capability of ultrasonic molding technology for processing thin-wall plates of polystyrene with a microchannel, analyzing the filling behavior, the optical transparency, and the dimensional accuracy of the thin plate. The replicability of the manufactured microchannel is studied according to dimension and shape. The results reveal that plunger velocity influences transparency and filling cavity, whereas the vibration amplitude has less effect in both cases. The thickness deviation achieved on the final part is below 7% and the replication of the microchannel is better in depth than width, obtaining an average deviation of 4% and 11%, respectively. This replication also depends on the orientation of the microchannels and the distance from the injection gate. The replicability and repeatability for processing thin-wall plates with microchannel in polystyrene polymer are proved in this paper.
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Affiliation(s)
- I Ferrer
- Department of Mechanical Engineering & Industrial Construction, University of Girona, 17004 Girona, Spain.
| | - M Vives-Mestres
- Department of Computer Science, Applied Mathematics & Statistics, University of Girona, 17004 Girona, Spain.
| | - A Manresa
- Department of Mechanical Engineering & Industrial Construction, University of Girona, 17004 Girona, Spain.
| | - M L Garcia-Romeu
- Department of Mechanical Engineering & Industrial Construction, University of Girona, 17004 Girona, Spain.
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9
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Abstract
Abstract
Ultrasonic micro-molding technology can dispense, melt and inject as small an amount of polymer as is required for one cycle, an advantage which makes the process highly desirable for low-volume and customized production of micro parts made from sensitive and very expensive polymers, especially in the medical sector. In this study, the feasibility of processing the polyetheretherketone (PEEK) polymer was investigated. The experiments conducted determined the parameters of a process that would allow parts with specific mechanical properties to be produced and verified as not degraded. The development of the process used three amplitude values as well as varying plunger velocity and vibration times. The three amplitude values and four speed values were tested to determine appropriate parameters for the ultrasonic process. Completely filled samples without any visual signs of degradation were analysed using FTIR-ATR, crystallinity percentage and tensile strength tests. Results show that the amplitude parameter is an important factor in the ultrasonic process and the higher its value is, the better the mechanical properties of complete parts are. Moreover, the tensile strength value of the specimens fabricated by ultrasonic micro-molding is comparable to that of conventional injection molding technology.
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Affiliation(s)
- T. Dorf
- Department of Mechanical Engineering and Industrial Construction , University of Girona, Girona , Spain
| | - I. Ferrer
- Department of Mechanical Engineering and Industrial Construction , University of Girona, Girona , Spain
| | - J. Ciurana
- Department of Mechanical Engineering and Industrial Construction , University of Girona, Girona , Spain
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Arena A, Iyer AM, Milenkovic I, Kovacs GG, Ferrer I, Perluigi M, Aronica E. Developmental Expression and Dysregulation of miR-146a and miR-155 in Down's Syndrome and Mouse Models of Down's Syndrome and Alzheimer's Disease. Curr Alzheimer Res 2018; 14:1305-1317. [PMID: 28720071 DOI: 10.2174/1567205014666170706112701] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 05/11/2017] [Accepted: 05/18/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND miR-146a and miR-155 are key regulators of the innate immune response. We hypothesized that an inflammation-mediated dysregulation of these miRNAs may occur in patients with Down syndrome (DS) and Alzheimer's disease (AD). METHODS The miRNA expression patterns were investigated by in situ hybridization in developing hippocampus from controls, patients with DS and in adults with AD pathology (DS and sporadic AD; sAD). Quantitative real-time PCR was employed to evaluate the miRNA levels in the hippocampus of sAD and in mouse models of DS and AD. Both miRNAs were expressed in prenatal human hippocampus. In DS we detected increased miR-146a expression in reactive astrocytes. Increased expression of miR-146a was found in the hippocampus of sAD and negatively correlated with its target IRAK-1. APP/PS1 mice showed a significant increase in the expression of both miRNAs at 11-13 months of age as compared to WT and mice at 3 months. A negative correlation between miR-146a levels and its target TRAF6 was observed in both Ts65Dn and APP/PS1 mice. CONCLUSION These findings suggest a possible involvement of miR-146a and miR-155 in brain development and neurodegeneration. In particular, we provide evidence of a dysregulation of these two immunomodulatory miRNAs in AD with a potential therapeutical implication, deserving further investigation.
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Affiliation(s)
- A Arena
- Department of (Neuro)Pathology, Academic Medical Center, University of Amsterdam. Netherlands
| | - A M Iyer
- Department of (Neuro)Pathology, Academic Medical Center, University of Amsterdam. Netherlands
| | - I Milenkovic
- Institute of Neurology, Medical University of Vienna. Austria
| | - G G Kovacs
- Institute of Neurology, Medical University of Vienna. Austria
| | - I Ferrer
- Institute of Neuropathology, Bellvitge University Hospital, University of Barcelona, Hospitalet de Llobregat. Spain
| | - M Perluigi
- Department of Biochemical Sciences, Sapienza University of Rome, Rome. Italy
| | - E Aronica
- Department of (Neuro) Pathology, Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam. Netherlands
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Martínez-Maldonado A, Luna-Muñoz J, Ferrer I. Incidental corticobasal degeneration. Neuropathol Appl Neurobiol 2018; 42:659-663. [PMID: 27461552 DOI: 10.1111/nan.12339] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 07/16/2016] [Accepted: 07/27/2016] [Indexed: 11/30/2022]
Affiliation(s)
| | - J Luna-Muñoz
- Banco Nacional de Cerebros, LaNSE, CINVESTAV, México DF, México
| | - I Ferrer
- Institute of Neuropathology, Service of Anatomic Pathology, Bellvitge University Hospital, Hospitalet de Llobregat, Spain.,Department of Pathology and Experimental Therapeutics, University of Barcelona, CIBERNED, Hospitalet de Llobregat, Spain
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12
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Alonso N, Cañueto J, Ciria S, Bueno E, Palacios‐Alvarez I, Alegre M, Badenas C, Barreiro A, Pena L, Maldonado C, Nespeira‐Jato M, Peña‐Penabad C, Azon A, Gavrilova M, Ferrer I, Sanmartin O, Robles L, Hernandez‐Martin A, Urioste M, Puig S, Puig L, Gonzalez‐Sarmiento R. Novel clinical and molecular findings in Spanish patients with nevoid basal cell carcinoma syndrome. Br J Dermatol 2018. [DOI: 10.1111/bjd.16207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Alonso N, Cañueto J, Ciria S, Bueno E, Palacios‐Alvarez I, Alegre M, Badenas C, Barreiro A, Pena L, Maldonado C, Nespeira‐Jato M, Peña‐Penabad C, Azon A, Gavrilova M, Ferrer I, Sanmartin O, Robles L, Hernandez A, Urioste M, Puig S, Puig L, Gonzalez‐Sarmiento R. 针对西班牙痣样基底细胞癌综合征患者的最新临床及分子研究结果. Br J Dermatol 2018. [DOI: 10.1111/bjd.16211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Alonso N, Cañueto J, Ciria S, Bueno E, Palacios-Alvarez I, Alegre M, Badenas C, Barreiro A, Pena L, Maldonado C, Nespeira-Jato MV, Peña-Penabad C, Azon A, Gavrilova M, Ferrer I, Sanmartin O, Robles L, Hernandez-Martin A, Urioste M, Puig S, Puig L, Gonzalez-Sarmiento R. Novel clinical and molecular findings in Spanish patients with naevoid basal cell carcinoma syndrome. Br J Dermatol 2017; 178:198-206. [PMID: 28733979 DOI: 10.1111/bjd.15835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Naevoid basal cell carcinoma syndrome (NBCCS) is an autosomal dominant disorder characterized by developmental alterations and multiple basal cell carcinomas. Mutations in PTCH1, which encodes a membrane receptor for Sonic Hedgehog, are associated with the development of the disease. Most of them produce a truncated protein, which is unable to suppress Smoothened protein and continuously activates the downstream pathway. OBJECTIVES We aimed to characterize 22 unrelated Spanish patients with NBCCS, the largest cohort with Gorlin syndrome reported to date in Spain. METHODS Genomic analysis of PTCH1 was performed in patients with NBCCS and controls, and mutations were analysed using bioinformatics tools. RESULTS We report for the first time two young patients, one each with uterus didelphys and ganglioneuroma, within the context of NBCCS. One patient showing a severe phenotype of the disease had developed basal cell carcinomas since childhood. Sanger sequencing of PTCH1 in this cohort identified 17 novel truncating mutations (11 frameshift, five nonsense and one mutation affecting an exon-intron splice site) and two novel missense mutations that were predicted to be pathogenic. The patients showed great clinical variability and inconsistent genotype-phenotype correlation, as seen in relatives carrying similar mutations. CONCLUSIONS This study contributes to increase the pool of clinical manifestations of NBCCS, as well as increasing the number of pathogenic mutations identified in PTCH1 predisposing to the condition. The inconsistencies found between phenotype and genotype suggest the involvement of other modifying factors, genetic, epigenetic or environmental.
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Affiliation(s)
- N Alonso
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain.,Rheumatology and Bone Disease Unit, Centre for Genomic and Experimental Medicine, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, U.K
| | - J Cañueto
- Department of Dermatology, Salamanca University Hospital, Salamanca, Spain.,Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University Hospital of Salamanca, University of Salamanca-CSIC, Salamanca, Spain
| | - S Ciria
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain
| | - E Bueno
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain.,Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University Hospital of Salamanca, University of Salamanca-CSIC, Salamanca, Spain
| | | | - M Alegre
- Department of Dermatology, Hospital Santa Creu i San Pau, Barcelona, Spain
| | - C Badenas
- Biochemistry and Molecular Genetics, Melanoma Unit, Hospital Clinic i Provincial, Barcelona, Spain.,Institut de Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras, Barcelona, Spain
| | - A Barreiro
- Department of Dermatology, Melanoma Unit, Hospital Clinic i Provincial, Barcelona, Spain
| | - L Pena
- Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - C Maldonado
- Department of Dermatology, Hospital Central de Asturias, Oviedo, Spain
| | - M V Nespeira-Jato
- Department of Dermatology, Hospital Universitario de La Coruña, La Coruña, Spain
| | - C Peña-Penabad
- Department of Dermatology, Hospital Universitario de La Coruña, La Coruña, Spain
| | - A Azon
- Department of Dermatology, Hospital San Joan de Reus, Reus, Spain
| | - M Gavrilova
- Department of Dermatology, Hospital Clínico de Valencia, Valencia, Spain
| | - I Ferrer
- Department of Dermatology, Hospital General Universitario de Valencia, Valencia, Spain
| | - O Sanmartin
- Department of Dermatology, Instituto Valenciano de Oncología, Valencia, Spain
| | - L Robles
- Hereditary Cancer Unit, Hospital 12 de Octubre, Madrid, Spain
| | | | - M Urioste
- Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - S Puig
- Institut de Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras, Barcelona, Spain.,Department of Dermatology, Melanoma Unit, Hospital Clinic i Provincial, Barcelona, Spain
| | - L Puig
- Department of Dermatology, Hospital Santa Creu i San Pau, Barcelona, Spain
| | - R Gonzalez-Sarmiento
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain.,Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University Hospital of Salamanca, University of Salamanca-CSIC, Salamanca, Spain
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15
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Gónzalez de San Román E, Manuel I, Giralt MT, Ferrer I, Rodríguez-Puertas R. Imaging mass spectrometry (IMS) of cortical lipids from preclinical to severe stages of Alzheimer's disease. Biochim Biophys Acta Biomembr 2017; 1859:1604-1614. [PMID: 28527668 DOI: 10.1016/j.bbamem.2017.05.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 05/12/2017] [Accepted: 05/14/2017] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease affecting millions of patients worldwide. Previous studies have demonstrated alterations in the lipid composition of lipid extracts from plasma and brain samples of AD patients. However, there is no consensus regarding the qualitative and quantitative changes of lipids in brains from AD patients. In addition, the recent developments in imaging mass spectrometry methods are leading to a new stage in the in situ analysis of lipid species in brain tissue slices from human postmortem samples. The present study uses the matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS), permitting the direct anatomical analysis of lipids in postmortem brain sections from AD patients, which are compared with the intensity of the lipid signal in samples from matched subjects with no neurological diseases. The frontal cortex samples from AD patients were classified in three groups based on Braak's histochemical criteria, ranging from non-cognitively impaired patients to those severely affected. The main results indicate a depletion of different sulfatide lipid species from the earliest stages of the disease in both white and gray matter areas of the frontal cortex. Therefore, the decrease in sulfatides in cortical areas could be considered as a marker of the disease, but may also indicate neurochemical modifications related to the pathogenesis of the disease. This article is part of a Special Issue entitled: Membrane Lipid Therapy: Drugs Targeting Biomembranes edited by Pablo V. Escribá.
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Affiliation(s)
- E Gónzalez de San Román
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), B Sarriena s/n, 48940 Leioa, Spain
| | - I Manuel
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), B Sarriena s/n, 48940 Leioa, Spain
| | - M T Giralt
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), B Sarriena s/n, 48940 Leioa, Spain
| | - I Ferrer
- Institut Neuropatologia, Servei Anatomia Patologica, IDIBELL - Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Spain; Departament de Patologia i Terapèutica Experimental, Universitat de Barcelona, Barcelona, Spain
| | - R Rodríguez-Puertas
- Department of Pharmacology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), B Sarriena s/n, 48940 Leioa, Spain.
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16
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Andrés-Benito P, Fernández-Dueñas V, Carmona M, Escobar LA, Torrejón-Escribano B, Aso E, Ciruela F, Ferrer I. Locus coeruleus at asymptomatic early and middle Braak stages of neurofibrillary tangle pathology. Neuropathol Appl Neurobiol 2017; 43:373-392. [PMID: 28117912 DOI: 10.1111/nan.12386] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/19/2017] [Accepted: 01/24/2017] [Indexed: 12/11/2022]
Abstract
AIMS The present study analyses molecular characteristics of the locus coeruleus (LC) and projections to the amygdala and hippocampus at asymptomatic early and middle Braak stages of neurofibrillary tangle (NFT) pathology. METHODS Immunohistochemistry, whole-transcriptome arrays and RT-qPCR in LC and western blotting in hippocampus and amygdala in a cohort of asymptomatic individuals at stages I-IV of NFT pathology were used. RESULTS NFTs in the LC increased in parallel with colocalized expression of tau kinases, increased neuroketal adducts and decreased superoxide dismutase 1 in neurons with hyperphosphorylated tau and decreased voltage-dependent anion channel in neurons containing truncated tau were found. These were accompanied by increased microglia and AIF1, CD68, PTGS2, IL1β, IL6 and TNF-α gene expression. Whole-transcriptome arrays revealed upregulation of genes coding for proteins associated with heat shock protein binding and genes associated with ATP metabolism and downregulation of genes coding for DNA-binding proteins and members of the small nucleolar RNAs family, at stage IV when compared with stage I. Tyrosine hydroxylase (TH) immunoreactivity was preserved in neurons of the LC, but decreased TH and increased α2A adrenergic receptor protein levels were found in the hippocampus and the amygdala. CONCLUSIONS Complex alteration of several metabolic pathways occurs in the LC accompanying NFT formation at early and middle asymptomatic stages of NFT pathology. Dopaminergic/noradrenergic denervation and increased expression of α2A adrenergic receptor in the hippocampus and amygdala occur at first stage of NFT pathology, suggesting compensatory activation in the face of decreased adrenergic input occurring before clinical evidence of cognitive impairment and depression.
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Affiliation(s)
- P Andrés-Benito
- Institut de Neuropatologia, Servei d'Anatomia Patològica, Hospital Universitari de Bellvitge, Barcelona, Spain
| | - V Fernández-Dueñas
- Unitat de Farmacologia, Departament Patologia i Terapèutica Experimental, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - M Carmona
- Institut de Neuropatologia, Servei d'Anatomia Patològica, Hospital Universitari de Bellvitge, Barcelona, Spain
| | - L A Escobar
- Institut de Neuropatologia, Servei d'Anatomia Patològica, Hospital Universitari de Bellvitge, Barcelona, Spain
| | - B Torrejón-Escribano
- Unitat de Biologia (BT-E), Serveis Cientifics I Tecnics, Universitat de Barcelona, Madrid, Spain
| | - E Aso
- Institut de Neuropatologia, Servei d'Anatomia Patològica, Hospital Universitari de Bellvitge, Barcelona, Spain.,Departament de Patologia i Terapèutica Experimental, Universitat de Barcelona, L'Hospitalet de Llobregat, Madrid, Spain
| | - F Ciruela
- Unitat de Farmacologia, Departament Patologia i Terapèutica Experimental, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - I Ferrer
- Institut de Neuropatologia, Servei d'Anatomia Patològica, Hospital Universitari de Bellvitge, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,Departament de Patologia i Terapèutica Experimental, Universitat de Barcelona, L'Hospitalet de Llobregat, Madrid, Spain.,CIBERNED, Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, Instituto de Salud Carlos III, Madrid, Spain
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17
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Pastor MD, Nogal A, Molina-Pinelo S, Quintanal-Villalonga Á, Meléndez R, Ferrer I, Romero-Romero B, De Miguel MJ, López-Campos JL, Corral J, García-Carboner R, Carnero A, Paz-Ares L. IL-11 and CCL-1: Novel Protein Diagnostic Biomarkers of Lung Adenocarcinoma in Bronchoalveolar Lavage Fluid (BALF). J Thorac Oncol 2016; 11:2183-2192. [DOI: 10.1016/j.jtho.2016.07.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 05/30/2016] [Accepted: 07/18/2016] [Indexed: 12/22/2022]
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18
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Torres AK, Escartín N, Monzó C, Guzmán C, Ferrer I, González-Muñoz C, Peña P, Monzó V, Marcaida G, Rodríguez-López R. Genetic susceptibility to Gilbert's syndrome in a valencian population; efficacy of the fasting test. Rev Clin Esp 2016; 217:1-6. [PMID: 27866642 DOI: 10.1016/j.rce.2016.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/26/2016] [Accepted: 10/02/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To describe the populational distribution of the UGT1A1*28 variant (genetic variant code rs8175347) located in the promotor of the UGT gene and correlate its genotypes with the results of the fasting test, as well as its relationship with the biochemical disorder of Gilbert's syndrome (GS) in a Valencian population. PATIENTS AND METHODS We studied the prevalence of the genotypes (TA)6/6 (TA)6/7 and (TA)7/7 of the deleterious variant rs8175347 in 144 patients with hyperbilirubinemia, 38 of whom had previously undergone the fasting test to diagnose GS, and in 150 control patients. By analysing the genomic region of the TATA box of the UGT1A1 gene promotor using Sanger sequencing, we established the correlation between the rs8175347 genotypes and the fasting test results and with the patients' biochemical disorders. RESULTS The rate of heterozygosity of allele (TA)7 in the control population was 32% and increased to 87.59% among the patients with suspected GS. The rate of genotype TA7/7 was 81.94% among the patients with hyperbilirubinemia, compared with 11.33% in the control patients. The fasting test showed a 15.79% rate of false negatives and a 5.26% rate of false positives. CONCLUSIONS The high frequency of allele (TA)7 among the Valencian control population, almost double the 5% reported for European control patients, confirms the high rate of GS reported in the Spanish population, without observing significant differences between the geographical ends of the country. The efficacy and reliability of the fasting test for the diagnosis of GS is questionable.
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Affiliation(s)
- A K Torres
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - N Escartín
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - C Monzó
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - C Guzmán
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - I Ferrer
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - C González-Muñoz
- Servicio de Digestivo, Hospital General de Valencia, Valencia, España
| | - P Peña
- Laboratorio de Bioquímica, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - V Monzó
- Laboratorio de Bioquímica, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - G Marcaida
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España; Laboratorio de Bioquímica, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España
| | - R Rodríguez-López
- Laboratorio de Genética Molecular, Servicio de Análisis Clínicos, Hospital General de Valencia, Valencia, España.
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19
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Quintanal A, Ferrer I, Ojeda-Márquez L, Marrugal Á, Suarez R, García-Redondo L, Carnero A, Paz-Ares L, Molina-Pinelo S. The oncogenic role of FGFR1 depends on the molecular context. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw392.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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20
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Molina-Pinelo S, Meléndez R, Suarez R, García L, Ojeda L, Yague P, Paz-Ares L, Ferrer I. Generation and characterization of a collection of patient-derived xenografts (PDX) models for translational lung cancer research. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw392.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Quintanal-Villalonga A, Ferrer I, Marrugal Á, Ojeda-Márquez L, García-Redondo L, Suarez R, Zugazagoitia J, Carnero A, Paz-Ares L, Molina-Pinelo S. FGFR4 exerts differential roles in tumorigenesis through a mechanism of cooperation. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw392.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Marrugal A, Márquez LO, Quintanal Á, Molina-Pinelo S, Ferrer I, Carnero A, Paz-Ares L. 19P Comparative effectiveness analysis of HSP90 inhibitors in non-small cell lung cancer. J Thorac Oncol 2016. [DOI: 10.1016/s1556-0864(16)30133-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Molina-Pinelo S, Ferrer I, Salinas A, Suarez R, Melendez R, Marrugal A, Carnero A, Paz-Ares L. 3037 Hypomethylation pattern key in lung tumorigenesis. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31680-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Molina-Pinelo S, Meléndez R, Salinas A, Suarez R, Lopez-Jimenez C, Carnero A, Paz-Ares L, Ferrer I. 3041 Patient Derived Xenografts platform focused on developing effective anticancer agents for KRAS and FRFR1/4. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31684-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Molina-Pinelo S, Pastor M, Suarez R, Ferrer I, Salinas A, Marrugal A, Garcia-Carbonero R, Carnero A, Paz-Ares L. 3039 Dysregulated micrornas in lung cancer and copd. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31682-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Ferrer I, Verdugo-Sivianes E, Castilla M, Melendez R, Perez M, Palacios J, Carnero A. 120 Loss of tumor suppressor Spinophilin (PPP1R9B) increases the cancer stem cell population in breast tumors. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30018-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Morató L, Ruiz M, Boada J, Calingasan NY, Galino J, Guilera C, Jové M, Naudí A, Ferrer I, Pamplona R, Serrano M, Portero-Otín M, Beal MF, Fourcade S, Pujol A. Activation of sirtuin 1 as therapy for the peroxisomal disease adrenoleukodystrophy. Cell Death Differ 2015; 22:1742-53. [PMID: 25822341 DOI: 10.1038/cdd.2015.20] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 12/16/2014] [Accepted: 01/29/2015] [Indexed: 12/29/2022] Open
Abstract
Oxidative stress and mitochondrial failure are prominent factors in the axonal degeneration process. In this study, we demonstrate that sirtuin 1 (SIRT1), a key regulator of the mitochondrial function, is impaired in the axonopathy and peroxisomal disease X-linked adrenoleukodystrophy (X-ALD). We have restored SIRT1 activity using a dual strategy of resveratrol treatment or by the moderate transgenic overexpression of SIRT1 in a X-ALD mouse model. Both strategies normalized redox homeostasis, mitochondrial respiration, bioenergetic failure, axonal degeneration and associated locomotor disabilities in the X-ALD mice. These results indicate that the reactivation of SIRT1 may be a valuable strategy to treat X-ALD and other axonopathies in which the control of redox and energetic homeostasis is impaired.
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Affiliation(s)
- L Morató
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - M Ruiz
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - J Boada
- Experimental Medicine Department, University of Lleida-IRBLleida, 25008 Lleida, Spain
| | - N Y Calingasan
- Department of Neurology and Neuroscience, Weill Cornell Medical College, 1006 New York, USA
| | - J Galino
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - C Guilera
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - M Jové
- Experimental Medicine Department, University of Lleida-IRBLleida, 25008 Lleida, Spain
| | - A Naudí
- Experimental Medicine Department, University of Lleida-IRBLleida, 25008 Lleida, Spain
| | - I Ferrer
- Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Neurodegenerative Diseases (CIBERNED) ISCIII, Spain
| | - R Pamplona
- Experimental Medicine Department, University of Lleida-IRBLleida, 25008 Lleida, Spain
| | - M Serrano
- Tumor Suppression Group, Spanish National Cancer Research Centre (CNIO), 28029 Madrid, Spain
| | - M Portero-Otín
- Experimental Medicine Department, University of Lleida-IRBLleida, 25008 Lleida, Spain
| | - M F Beal
- Department of Neurology and Neuroscience, Weill Cornell Medical College, 1006 New York, USA
| | - S Fourcade
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain
| | - A Pujol
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER) ISCIII, Spain.,Institute of Neuropathology, University of Barcelona, L'Hospitalet de Llobregat, 08908 Barcelona, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain
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28
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Castro M, Carrillo R, García F, Sanz P, Ferrer I, Ruiz-Sala P, Vega AI, Ruíz Desviat L, Pérez B, Pérez-Cerdá C, Merinero B, Ugarte M. Thirteen years experience with selective screening for disorders in purine and pyrimidine metabolism. Nucleosides Nucleotides Nucleic Acids 2015; 33:233-40. [PMID: 24940674 DOI: 10.1080/15257770.2013.854381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Purine and pyrimidine disorders represent a heterogeneous group with variable clinical symptoms and low prevalence rate. In the last thirteen years, we have studied urine/plasma specimens from about 1600 patients and we have identified 35 patients: eight patients with adenylosuccinate lyase deficiency, eight patients with hypoxanthine-guanine phosphoribosyltransferase deficiency, one patient with purine nucleoside phosphorylase deficiency, ten patients with xanthine dehydrogenase deficiency, six patients with molybdenum cofactor deficiency and two patients with dihydropyrimidine dehydrogenase deficiency. Despite low incidence of these diseases, our findings highlight the importance of including the purine and pyrimidine analysis in the selective screening for inborn errors of metabolism in specialized laboratories, where amino acid and organic acid disorders are simultaneously investigated.
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Affiliation(s)
- M Castro
- a Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), Universidad Autónoma de Madrid (UAM), Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER) , Madrid , Spain
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Porquet D, Andrés-Benito P, Griñán-Ferré C, Camins A, Ferrer I, Canudas AM, Del Valle J, Pallàs M. Amyloid and tau pathology of familial Alzheimer's disease APP/PS1 mouse model in a senescence phenotype background (SAMP8). Age (Dordr) 2015; 37:9747. [PMID: 25663420 PMCID: PMC4320125 DOI: 10.1007/s11357-015-9747-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 01/22/2015] [Indexed: 05/30/2023]
Abstract
The amyloid precursor protein/presenilin 1 (APP/PS1) mouse model of Alzheimer's disease (AD) has provided robust neuropathological hallmarks of familial AD-like pattern at early ages, whereas senescence-accelerated mouse prone 8 (SAMP8) has a remarkable early senescence phenotype with pathological similarities to AD. The aim of this study was the investigation and characterization of cognitive and neuropathological AD markers in a novel mouse model that combines the characteristics of the APP/PS1 transgenic mouse model with a senescence-accelerated background of SAMP8 mice. Initially, significant differences were found regarding amyloid plaque formation and cognitive abnormalities. Bearing these facts in mind, we determined a general characterization of the main AD brain molecular markers, such as alterations in amyloid pathway, neuroinflammation, and hyperphosphorylation of tau in these mice along their lifetimes. Results from this analysis revealed that APP/PS1 in SAMP8 background mice showed alterations in the pathways studied in comparison with SAMP8 and APP/PS1, demonstrating that a senescence-accelerated background exacerbated the amyloid pathology and maintained the cognitive dysfunction present in APP/PS1 mice. Changes in tau pathology, including the activity of cyclin-dependent kinase 5 (CDK5) and glycogen synthase kinase 3 β (GSK3β), differs, but not in a parallel manner, with amyloid disturbances.
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Affiliation(s)
- D. Porquet
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - P. Andrés-Benito
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
| | - C. Griñán-Ferré
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - A. Camins
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - I. Ferrer
- />Institut de Neuropatologia de l’Hospital Universitari de Bellvitge (HUB), Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), Universitat de Barcelona (UB), 08907 Bellvitge, Barcelona Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - A. M. Canudas
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - J. Del Valle
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Grup de Neuroplasticitat i Regeneració, Institut de Neurociències i Departament de Biologia cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Mercè Pallàs
- />Secció de Farmacologia, Departament Farmacologia i Química Terapèutica, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona (UB), Av. Diagonal 643, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
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Strobel S, Grünblatt E, Riederer P, Heinsen H, Arzberger T, Al-Sarraj S, Troakes C, Ferrer I, Monoranu CM. Changes in the expression of genes related to neuroinflammation over the course of sporadic Alzheimer's disease progression: CX3CL1, TREM2, and PPARγ. J Neural Transm (Vienna) 2015; 122:1069-76. [PMID: 25596843 DOI: 10.1007/s00702-015-1369-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/12/2015] [Indexed: 12/28/2022]
Abstract
The role of neuroinflammation in the pathogenesis of neurodegenerative diseases has become more evident in recent years. Research on the etiology and pathogenesis of sporadic Alzheimer's disease (AD) has focused on the role of chemokines such as CX3CL1, on the triggering receptors expressed by myeloid cells (TREMs), especially TREM2, and on the transcription factor/nuclear hormone receptor peroxisome proliferator-activated receptor gamma (PPARγ). Here we analyzed the expression levels of CX3CL1, TREM2, and PPARγ in tissue homogenates from human brain regions that have different degrees of vulnerability to neuropathological AD-related changes to obtain insights into the pathogenesis and progression of AD. We found that CX3CL1 and TREM2, two genes related to neuroinflammation, are more highly expressed in brain regions with pronounced vulnerability to AD-related changes, such as the hippocampus, and that the expression levels reflect the course of the disease, whereas regions with low vulnerability to AD, seemed generally less affected by neuroinflammation. Furthermore, our results support previous findings of significantly higher CX3CL1 plasma levels in patients with mild to moderate AD than in patients with severe AD. Thus, CX3CL1 should be considered as promising additional marker for the early diagnosis of AD and underlines once more, the involvement of the neuroinflammation in the pathogenesis of this neurodegenerative disease.
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Affiliation(s)
- S Strobel
- Department of Neuropathology, Institute of Pathology, University of Wuerzburg, Josef-Schneider-Str. 2, 97080, Wuerzburg, Germany
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31
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Negre P, Grabalosa J, Ferrer I, Ciurana J, Elías-Zúñiga A, Rivillas F. Study of the Ultrasonic Molding Process Parameters for Manufacturing Polypropylene Parts. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proeng.2015.12.460] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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López-Aguilar J, Bassi GL, Quílez ME, Martí JD, Rigol M, Tavares-Ranzani O, Aguilera E, Ferrer I, Blanch L, Torres A. 0468. Cerebral effects of lateral trendelenburg vs semirecumbent position in an experimental model of ventilator-associated pneumonia. Intensive Care Med Exp 2014. [PMCID: PMC4796195 DOI: 10.1186/2197-425x-2-s1-o14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
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33
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Fernandez-Nogales M, Cabrera J, Santos-Galindo M, Hoozemans J, Ferrer I, Rozemuller A, Hernandez F, Avila J, Lucas J. B24 Huntington's Disease As A Tauopathy. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fernandez-Echevarria C, Díaz M, Ferrer I, Canerina-Amaro A, Marin R. Aβ promotes VDAC1 channel dephosphorylation in neuronal lipid rafts. Relevance to the mechanisms of neurotoxicity in Alzheimer's disease. Neuroscience 2014; 278:354-66. [PMID: 25168729 DOI: 10.1016/j.neuroscience.2014.07.079] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/23/2014] [Accepted: 07/24/2014] [Indexed: 11/25/2022]
Abstract
Voltage-dependent anion channel (VDAC) is a mitochondrial protein abundantly found in neuronal lipid rafts. In these membrane domains, VDAC is associated with a complex of signaling proteins that trigger neuroprotective responses. Loss of lipid raft integrity may result in disruption of multicomplex association and alteration of signaling responses that may ultimately promote VDAC activation. Some data have demonstrated that VDAC at the neuronal membrane may be involved in the mechanisms of amyloid beta (Aβ)-induced neurotoxicity, through yet unknown mechanisms. Aβ is generated from amyloid precursor protein (APP), and is released to the extracellular space where it may undergo self-aggregation. Aβ aggregate deposition in the form of senile plaques may lead to Alzheimer's disease (AD) neuropathology, although other pathological hallmarks (such as hyper-phosphorylated Tau deposition) also participate in this neurodegenerative process. The present study demonstrates that VDAC1 associates with APP and Aβ in lipid rafts of neurons. Interaction of VDAC1 with APP was observed in lipid rafts from the frontal and entorhinal cortex of human brains affected by AD at early stages (I-IV/0-B of Braak and Braak). Furthermore, Aβ exposure enhanced the dephosphorylation of VDAC1 that correlated with cell death. Both effects were reverted in the presence of tyrosine phosphatase inhibitors. VDAC1 dephosphorylation was corroborated in lipid rafts of AD brains. These results demonstrate that Aβ is involved in alterations of the phosphorylation state of VDAC in neuronal lipid rafts. Modulation of this channel may contribute to the development and progression of AD pathology.
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Affiliation(s)
- C Fernandez-Echevarria
- Laboratory of Cellular Neurobiology, Department of Physiology, University of La Laguna, School of Medicine, Sta. Cruz de Tenerife, Spain
| | - M Díaz
- Laboratory of Membrane Physiology and Biophysics, Department of Animal Biology, Faculty of Biology, University of La Laguna, Sta. Cruz de Tenerife, Spain
| | - I Ferrer
- Institute of Neuropathology, Bellvitge University Hospital, University of Barcelona, IDIBELL, CIBERNED, Hospitalet de Llobregat, Barcelona, Spain
| | - A Canerina-Amaro
- Laboratory of Cellular Neurobiology, Department of Physiology, University of La Laguna, School of Medicine, Sta. Cruz de Tenerife, Spain
| | - R Marin
- Laboratory of Cellular Neurobiology, Department of Physiology, University of La Laguna, School of Medicine, Sta. Cruz de Tenerife, Spain.
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Ferrer I. Selection of controls in the study of human neurodegenerative diseases in old age. J Neural Transm (Vienna) 2014; 122:941-7. [DOI: 10.1007/s00702-014-1287-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Accepted: 07/24/2014] [Indexed: 12/13/2022]
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36
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Vergara C, Ordóñez-Gutiérrez L, Wandosell F, Ferrer I, del Río JA, Gavín R. Role of PrP(C) Expression in Tau Protein Levels and Phosphorylation in Alzheimer's Disease Evolution. Mol Neurobiol 2014; 51:1206-20. [PMID: 24965601 DOI: 10.1007/s12035-014-8793-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 06/15/2014] [Indexed: 10/25/2022]
Abstract
Alzheimer's disease (AD) is characterized by the presence of amyloid plaques mainly consisting of hydrophobic β-amyloid peptide (Aβ) aggregates and neurofibrillary tangles (NFTs) composed principally of hyperphosphorylated tau. Aβ oligomers have been described as the earliest effectors to negatively affect synaptic structure and plasticity in the affected brains, and cellular prion protein (PrP(C)) has been proposed as receptor for these oligomers. The most widely accepted theory holds that the toxic effects of Aβ are upstream of change in tau, a neuronal microtubule-associated protein that promotes the polymerization and stabilization of microtubules. However, tau is considered decisive for the progression of neurodegeneration, and, indeed, tau pathology correlates well with clinical symptoms such as dementia. Different pathways can lead to abnormal phosphorylation, and, as a consequence, tau aggregates into paired helical filaments (PHF) and later on into NFTs. Reported data suggest a regulatory tendency of PrP(C) expression in the development of AD, and a putative relationship between PrP(C) and tau processing is emerging. However, the role of tau/PrP(C) interaction in AD is poorly understood. In this study, we show increased susceptibility to Aβ-derived diffusible ligands (ADDLs) in neuronal primary cultures from PrP(C) knockout mice, compared to wild-type, which correlates with increased tau expression. Moreover, we found increased PrP(C) expression that paralleled with tau at early ages in an AD murine model and in early Braak stages of AD in affected individuals. Taken together, these results suggest a protective role for PrP(C) in AD by downregulating tau expression, and they point to this protein as being crucial in the molecular events that lead to neurodegeneration in AD.
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Affiliation(s)
- C Vergara
- Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia, Baldiri Reixac 15-21, 08028, Barcelona, Spain
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Cabello J, Sämann J, Gómez-Orte E, Erazo T, Coppa A, Pujol A, Büssing I, Schulze B, Lizcano JM, Ferrer I, Baumeister R, Dalfo E. PDR-1/hParkin negatively regulates the phagocytosis of apoptotic cell corpses in Caenorhabditis elegans. Cell Death Dis 2014; 5:e1120. [PMID: 24625979 PMCID: PMC3973248 DOI: 10.1038/cddis.2014.57] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 12/23/2013] [Accepted: 01/22/2014] [Indexed: 12/28/2022]
Abstract
Apoptotic cell death is an integral part of cell turnover in many tissues, and proper corpse clearance is vital to maintaining tissue homeostasis in all multicellular organisms. Even in tissues with high cellular turnover, apoptotic cells are rarely seen because of efficient clearance mechanisms in healthy individuals. In Caenorhabditis elegans, two parallel and partly redundant conserved pathways act in cell corpse engulfment. The pathway for cytoskeletal rearrangement requires the small GTPase CED-10 Rac1 acting for an efficient surround of the dead cell. The CED-10 Rac pathway is also required for the proper migration of the distal tip cells (DTCs) during the development of the C. elegans gonad. Parkin, the mammalian homolog of the C. elegans PDR-1, interacts with Rac1 in aged human brain and it is also implicated with actin dynamics and cytoskeletal rearrangements in Parkinsons's disease, suggesting that it might act on engulfment. Our genetic and biochemical studies indicate that PDR-1 inhibits apoptotic cell engulfment and DTC migration by ubiquitylating CED-10 for degradation.
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Affiliation(s)
- J Cabello
- CIBIR (Centre for Biomedical Research of La Rioja), C/Piqueras 98, Logroño 26006, Spain
| | - J Sämann
- Bioinformatics and Molecular Genetics (Faculty of Biology), Center for Biochemistry and Molecular Cell Research (Faculty of Medicine), Schänzlestrasse 1, Freiburg 79104, Germany
| | - E Gómez-Orte
- CIBIR (Centre for Biomedical Research of La Rioja), C/Piqueras 98, Logroño 26006, Spain
| | - T Erazo
- Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Barcelona 08193, Spain
| | - A Coppa
- Neurometabolic Diseases Laboratory, Institut D'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona 08907, Spain
| | - A Pujol
- 1] Neurometabolic Diseases Laboratory, Institut D'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona 08907, Spain [2] ICREA (Institució Catalana de Recerca i Estudis avançats), Barcelona, Spain [3] Institute of Neuropathology, University Hospitall Bellvitge - University of Barcelona - IDIBELL, L'Hospitalet de Llobregat, Ciberned, Spain [4] CIBERER (Centro de Investigación Biomédica en Enfermedades Raras), C/ Álvaro de Bazán, 10 Bajo, Valencia 46010, Spain
| | - I Büssing
- Bioinformatics and Molecular Genetics (Faculty of Biology), Center for Biochemistry and Molecular Cell Research (Faculty of Medicine), Schänzlestrasse 1, Freiburg 79104, Germany
| | - B Schulze
- Bioinformatics and Molecular Genetics (Faculty of Biology), Center for Biochemistry and Molecular Cell Research (Faculty of Medicine), Schänzlestrasse 1, Freiburg 79104, Germany
| | - J M Lizcano
- Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Barcelona 08193, Spain
| | - I Ferrer
- Institute of Neuropathology, University Hospitall Bellvitge - University of Barcelona - IDIBELL, L'Hospitalet de Llobregat, Ciberned, Spain
| | - R Baumeister
- 1] Bioinformatics and Molecular Genetics (Faculty of Biology), Center for Biochemistry and Molecular Cell Research (Faculty of Medicine), Schänzlestrasse 1, Freiburg 79104, Germany [2] Centre for Biological Signaling Studies (bioss), University of Freiburg, Freiburg 79104, Germany [3] FRIAS Freiburg Institute for Advanced Studies, Section Life Sciences (LIFENET), University of Freiburg, Schaenzlestrasse 1, Freiburg 79104, Germany
| | - E Dalfo
- 1] Bioinformatics and Molecular Genetics (Faculty of Biology), Center for Biochemistry and Molecular Cell Research (Faculty of Medicine), Schänzlestrasse 1, Freiburg 79104, Germany [2] Neurometabolic Diseases Laboratory, Institut D'Investigació Biomèdica de Bellvitge (IDIBELL), Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona 08907, Spain [3] Institute of Neuropathology, University Hospitall Bellvitge - University of Barcelona - IDIBELL, L'Hospitalet de Llobregat, Ciberned, Spain [4] CIBERER (Centro de Investigación Biomédica en Enfermedades Raras), C/ Álvaro de Bazán, 10 Bajo, Valencia 46010, Spain
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Donovan M, Colomer A, Puig P, Erill N, Alarcon I, Vidal N, Ferrer I. MC13-0051 Molecular characterization of anaplastic astrocytoma and glioblastoma multiforme: PTEN loss in conjunction with EGFR alterations predicts response to therapy. Eur J Cancer 2013. [DOI: 10.1016/s0959-8049(13)70162-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jou C, Nascimento A, Ortez C, Olivè M, Ferrer I, Cusí V, Rovira C, Sunol M, Corbera J, Colomer J, Jimenez-Mallebrera C. P.17.6 Globular inclusions are a frequent finding in infantile Pompe’s disease. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Klementieva O, Aso E, Filippini D, Benseny-Cases N, Carmona M, Juvés S, Appelhans D, Cladera J, Ferrer I. Effect of Poly(propylene imine) Glycodendrimers on β-Amyloid Aggregation in Vitro and in APP/PS1 Transgenic Mice, as a Model of Brain Amyloid Deposition and Alzheimer’s Disease. Biomacromolecules 2013; 14:3570-80. [DOI: 10.1021/bm400948z] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- O. Klementieva
- Institute of Neuropathology,
Pathologic Anatomy Service, IDIBELL-University Hospital Bellvitge, Feixa Llarga
sn, 08907 L’Hospitalet
de Llobregat, Spain
| | - E. Aso
- Institute of Neuropathology,
Pathologic Anatomy Service, IDIBELL-University Hospital Bellvitge, Feixa Llarga
sn, 08907 L’Hospitalet
de Llobregat, Spain
| | - D. Filippini
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, D-01069 Dresden, Germany
| | - N. Benseny-Cases
- Polygone
Scientifique Louis Néel, ESRF, 6 rue Jules Horowitz, 38000, Grenoble, France
| | - M. Carmona
- Institute of Neuropathology,
Pathologic Anatomy Service, IDIBELL-University Hospital Bellvitge, Feixa Llarga
sn, 08907 L’Hospitalet
de Llobregat, Spain
| | - S. Juvés
- Institute of Neuropathology,
Pathologic Anatomy Service, IDIBELL-University Hospital Bellvitge, Feixa Llarga
sn, 08907 L’Hospitalet
de Llobregat, Spain
| | - D. Appelhans
- Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, D-01069 Dresden, Germany
| | - J. Cladera
- Biophysics Unit
and Center of Studies in Biophysics, Department of Biochemistry
and Molecular Biology, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain
| | - I. Ferrer
- Institute of Neuropathology,
Pathologic Anatomy Service, IDIBELL-University Hospital Bellvitge, Feixa Llarga
sn, 08907 L’Hospitalet
de Llobregat, Spain
- Department
of Pathology and Experimental Therapy, School of Medicine, University of Barcelona, L’Hospitalet
de Llobregat, Spain
- CIBERNED, Instituto Carlos III, Madrid, Spain
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Ansoleaga B, Garcia-Esparcia P, Llorens F, Moreno J, Aso E, Ferrer I. Dysregulation of brain olfactory and taste receptors in AD, PSP and CJD, and AD-related model. Neuroscience 2013; 248:369-82. [DOI: 10.1016/j.neuroscience.2013.06.034] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 06/17/2013] [Indexed: 01/17/2023]
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López-Erauskin J, Galino J, Ruiz M, Cuezva JM, Fabregat I, Cacabelos D, Boada J, Martínez J, Ferrer I, Pamplona R, Villarroya F, Portero-Otín M, Fourcade S, Pujol A. Impaired mitochondrial oxidative phosphorylation in the peroxisomal disease X-linked adrenoleukodystrophy. Hum Mol Genet 2013; 22:3296-305. [PMID: 23604518 DOI: 10.1093/hmg/ddt186] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
X-linked adrenoleukodystrophy (X-ALD) is an inherited metabolic disorder of the nervous system characterized by axonopathy in spinal cords and/or cerebral demyelination, adrenal insufficiency and accumulation of very long-chain fatty acids (VLCFAs) in plasma and tissues. The disease is caused by malfunction of the ABCD1 gene, which encodes a peroxisomal transporter of VLCFAs or VLCFA-CoA. In the mouse, Abcd1 loss causes late onset axonal degeneration in the spinal cord, associated with locomotor disability resembling the most common phenotype in patients, adrenomyeloneuropathy. We have formerly shown that an excess of the VLCFA C26:0 induces oxidative damage, which underlies the axonal degeneration exhibited by the Abcd1(-) mice. In the present study, we sought to investigate the noxious effects of C26:0 on mitochondria function. Our data indicate that in X-ALD patients' fibroblasts, excess of C26:0 generates mtDNA oxidation and specifically impairs oxidative phosphorylation (OXPHOS) triggering mitochondrial ROS production from electron transport chain complexes. This correlates with impaired complex V phosphorylative activity, as visualized by high-resolution respirometry on spinal cord slices of Abcd1(-) mice. Further, we identified a marked oxidation of key OXPHOS system subunits in Abcd1(-) mouse spinal cords at presymptomatic stages. Altogether, our results illustrate some of the mechanistic intricacies by which the excess of a fatty acid targeted to peroxisomes activates a deleterious process of oxidative damage to mitochondria, leading to a multifaceted dysfunction of this organelle. These findings may be of relevance for patient management while unveiling novel therapeutic targets for X-ALD.
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Affiliation(s)
- J López-Erauskin
- Neurometabolic Diseases Laboratory, Institut d’Investigació Biomèdica de Bellvitge IDIBELL, L’Hospitalet de Llobregat, Barcelona, Catalonia, Spain
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Kovacs GG, Rozemuller AJM, van Swieten JC, Gelpi E, Majtenyi K, Al-Sarraj S, Troakes C, Bódi I, King A, Hortobágyi T, Esiri MM, Ansorge O, Giaccone G, Ferrer I, Arzberger T, Bogdanovic N, Nilsson T, Leisser I, Alafuzoff I, Ironside JW, Kretzschmar H, Budka H. Neuropathology of the hippocampus in FTLD-Tau with Pick bodies: a study of the BrainNet Europe Consortium. Neuropathol Appl Neurobiol 2013; 39:166-78. [DOI: 10.1111/j.1365-2990.2012.01272.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Parkinson disease (PD) is a systemic disease with variegated non-motor deficits and neurological symptoms, including impaired olfaction, autonomic failure, cognitive impairment and psychiatric symptoms, in addition to the classical motor symptoms. Many non-motor symptoms appear before or in parallel with motor deficits and then worsen with disease progression. Although there is a relationship, albeit not causal, between motor symptoms and the presence of Lewy bodies (LBs) and neurites filled with abnormal α-synuclein, other neurological alterations are independent of the amount of α-synuclein inclusions in neurons and neurites, thereby indicating that different mechanisms probably converge in the degenerative process. This may apply to complex alterations interfering with olfactory and autonomic nervous systemfunctions, emotions, sleep regulation, and behavioral, cognitive and mental performance. Involvement of the cerebral cortex leading to impaired behavior and cognition is related to several convergent altered factors including: a. dopaminergic, noradrenergic, serotoninergic and cholinergic cortical innervation; b. synapses; c. cortical metabolism; d. mitochondrial function and energy production; e. oxidative damage; f. transcription; g. protein expression; h. lipid composition; and i. ubiquitin–proteasome system and autophagy, among others. This complex situation indicates that multiple subcellular failure in selected cell populations is difficult to reconcilewith a reductionistic scenario of a single causative cascade of events leading to non-motor symptoms in PD. Furthermore, these alterationsmay appear at early stages of the disease and may precede the appearance of substantial irreversible cell loss by years. These observations have important implications in the design of therapeutic approaches geared to prevention and treatment of PD.
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Affiliation(s)
- I Ferrer
- Institute of Neuropathology, Service of Pathology, University Hospital of Bellvitge, Spain.
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Abstract
Phosphorylation and, therefore, binding capacity of microtubule-associated protein tau is regulated by specific kinases and phosphatases. Activation of tau kinases plays a crucial role in tau- hyper-phosphorylation in Alzheimer disease (AD) and related tauopathies. Among phosphatases, protein phosphatase 2A, PP2A, is a principal tau dephosphorylating enzyme in the brain. PP2A acts as trimer composed of a catalytic (PP2A C), a scaffolding (PP2A A) and a regulatory (PP2 AB; B55α) subunit. Several abnormalities of PP2A have been reported in AD, including decreased mRNA and protein levels of the PP2A C (not replicated by other studies); decreased protein levels of the PP2A A and B55α; reduced PP2A C methylation at Leu309 due to impaired function methyltransferase type IV; increased PP2A C phosphorylation at Tyr307; up-regulation of the PP2A inhibitors I1 and I2; and loss of enzymatic activity. These observations indicate that PP2A is a putative target of therapeutic intervention considering that enhancing PP2A activity would decrease tau hyper-phosphorylation in AD. In spite of these achievements further studies are needed to replicate the reported individual different alterations converging in PP2A in AD.
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Affiliation(s)
- L Torrent
- Institut de Neuropatologia, Servei Anatomia Patològica, IDIBELL-Hospital Universitari de Bellvitge, Universitat de Barcelona, Hospitalet de LLobregat, Spain
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Martinez-Saez E, Gelpi E, Rey MJ, Ferrer I, Ribalta T, Botta-Orfila T, Nos C, Yagüe J, Sanchez-Valle R. Hirano body-rich subtypes of Creutzfeldt-Jakob disease. Neuropathol Appl Neurobiol 2012; 38:153-61. [PMID: 21726270 DOI: 10.1111/j.1365-2990.2011.01208.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND In definite Creutzfeldt-Jakob disease (CJD), morphological and immunohistochemical patterns are useful to identify molecular subtypes. Severe cerebellar pathology and hippocampal involvement helps to identify VV subtypes. The rare VV1 variant (<1%), more frequent in young individuals, is additionally characterized by the presence of ballooned neurones in affected areas. In 1985, Cartier et al. described a family cluster of three individuals with an ataxic CJD form, showing, in addition to severe cerebellar and hippocampal involvement, the presence of frequent Hirano bodies (HB) in CA1 pyramidal neurones. HB are frequently found in aged individuals with Alzheimer pathology although they are not a specific finding. AIMS AND METHODS In this study, we evaluated the presence of HB in hippocampi of 54 genetically and molecularly characterized CJD cases, aiming to elucidate whether additional morphological features could be helpful to point to molecular subtypes. RESULTS We identified nine cases (four VV1, one out of three MV2K, three out of six MV2K+2C and one MV carrying a 96-base pair insertion) with abundant, partly bizarre and clustered HB in CA1 sector, not observed in other subtypes. The presence of HB was independent of hippocampal involvement by the disease itself. CONCLUSIONS Clusters of abundant HB might be found in rare CJD subtypes such as VV1, MV2K/MV2K+2C and some genetic cases. In addition to histopathological and PrP immunohistochemical deposition patterns, their presence might be a useful additional morphologic feature that could point to the molecular subtype, especially when genetic and/or Western blot analyses are not available.
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Affiliation(s)
- E Martinez-Saez
- Neurological Tissue Bank-University of Barcelona CCiT, Hospital Clínic, IDIBAPS Vall d'Hebron Research Institute and Pathology Department, Spain
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Sisó S, González L, Blanco R, Chianini F, Reid HW, Jeffrey M, Ferrer I. Neuropathological changes correlate temporally but not spatially with selected neuromodulatory responses in natural scrapie. Neuropathol Appl Neurobiol 2011; 37:484-99. [PMID: 21114681 DOI: 10.1111/j.1365-2990.2010.01152.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM Neuropathological changes classically associated with sheep scrapie do not always correlate with clinical disease. We aimed to determine if selected neuromodulatory responses were altered during the course of the infection as it has been described in Creutzfeldt-Jakob disease and experimental bovine spongiform encephalopathy. METHODS Hemi-brains from healthy sheep and natural scrapie cases at two stages of infection were examined for biochemical alterations related to the expression of type I metabotropic glutamatergic receptors (mGluR(1) ) and type I adenosine receptors I (A(1) R), and of selected downstream intermediate signalling targets. Immunohistochemistry for different scrapie-related neuropathological changes was performed in the contralateral hemi-brains. RESULTS PrP(d) deposition, spongiform change, astrocytosis and parvalbumin expression were significantly altered in brains from clinically affected sheep compared with preclinical cases and negative controls; the latter also showed significantly higher immunoreactivity for synaptophysin than clinical cases. Between clinically affected and healthy sheep, no differences were found in the protein levels of mGluR(1) , while phospholipase Cβ1 expression in terminally ill sheep was increased in some brain areas but decreased in others. Adenyl cyclase 1 and A(1) R levels were significantly lower in various brain areas of affected sheep. No abnormal biochemical expression levels of these markers were found in preclinically infected sheep. CONCLUSIONS These findings point towards an involvement of mGluR(1) and A(1) R downstream pathways in natural scrapie. While classical prion disease lesions and neuromodulatory responses converge in some affected regions, they do not do so in others suggesting that there are independent regulatory factors for distinct degenerative and neuroprotective responses.
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Affiliation(s)
- S Sisó
- Veterinary Laboratories Agency Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, UK.
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Muntané G, Ferrer I, Martinez-Vicente M. α-synuclein phosphorylation and truncation are normal events in the adult human brain. Neuroscience 2011; 200:106-19. [PMID: 22079575 DOI: 10.1016/j.neuroscience.2011.10.042] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 09/26/2011] [Accepted: 10/22/2011] [Indexed: 12/14/2022]
Abstract
α-synuclein is a key protein in Lewy body diseases (LBDs) and a major component of Lewy bodies and related aberrant cytoplasmic and neuritic inclusions. Regional differences in α-synuclein have been associated with selective neuronal vulnerability to Lewy pathology. Furthermore, phosphorylation at serine 129 (Ser129) and α-synuclein truncation have been considered crucial in the pathogenesis of Lewy inclusions. The present study shows consistent reduction in α-synuclein protein expression levels in the human substantia nigra and nucleus basalis of Meynert compared with other brain regions independently of age and pathology. Phosphorylated α-synuclein at Ser129 is naturally increased in these same regions, thus inversely related with the total amount of α-synuclein. In contrast, truncated α-synuclein is naturally observed in control and diseased brains and correlating with the total amount of α-synuclein. Several truncated variants have been identified where some of these variants are truncated at the C-terminal domain, whereas others are truncated at the N-terminal domain, and all are present in cases with and without Lewy pathology. Although accumulation of truncated α-synuclein variants and phosphorylated α-synuclein occurs in Lewy bodies, α-synuclein phosphorylation and truncation can be considered constitutive in control and diseased brains.
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Affiliation(s)
- G Muntané
- Institut de Neuropatologia, Servei Anatomia Patològica, IDIBELL-Hospital Universitari de Bellvitge, Hospitalet de LLobregat, CIBERNED, Instituto Carlos III, Barcelona, Spain
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Paco S, Ferrer I, Jou C, Cusí V, Corbera J, Colomer J, Nascimento A, Jiménez-Mallebrera C. P2.6 Muscle fibre atrophy and myogenesis co-exist in collagen VI deficient muscle. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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López M, Rezusta A, Seral C, Aspiroz C, Marne C, Aldea MJ, Ferrer I, Revillo MJ, Castillo FJ, Torres C. Detection and characterization of a ST6 clone of vanB2-Enterococcus faecalis from three different hospitals in Spain. Eur J Clin Microbiol Infect Dis 2011; 31:257-60. [DOI: 10.1007/s10096-011-1303-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2011] [Accepted: 05/16/2011] [Indexed: 11/29/2022]
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