Llorens, Franc

[["dc.bibliographiccitation.artnumber","83"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Molecular Neurodegeneration"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Llorens, Franc"],["dc.contributor.author","Thüne, Katrin"],["dc.contributor.author","Tahir, Waqas"],["dc.contributor.author","Kanata, Eirini"],["dc.contributor.author","Diaz-Lucena, Daniela"],["dc.contributor.author","Xanthopoulos, Konstantinos"],["dc.contributor.author","Kovatsi, Eleni"],["dc.contributor.author","Pleschka, Catharina"],["dc.contributor.author","Garcia-Esparcia, Paula"],["dc.contributor.author","Schmitz, Matthias"],["dc.contributor.author","Ozbay, Duru"],["dc.contributor.author","Correia, Susana"],["dc.contributor.author","Correia, Ângela"],["dc.contributor.author","Milosevic, Ira"],["dc.contributor.author","Andréoletti, Olivier"],["dc.contributor.author","Fernández-Borges, Natalia"],["dc.contributor.author","Vorberg, Ina M."],["dc.contributor.author","Glatzel, Markus"],["dc.contributor.author","Sklaviadis, Theodoros"],["dc.contributor.author","Torres, Juan Maria"],["dc.contributor.author","Krasemann, Susanne"],["dc.contributor.author","Sánchez-Valle, Raquel"],["dc.contributor.author","Ferrer, Isidro"],["dc.contributor.author","Zerr, Inga"],["dc.date.accessioned","2019-07-09T11:44:59Z"],["dc.date.available","2019-07-09T11:44:59Z"],["dc.date.issued","2017"],["dc.description.abstract","Background YKL-40 (also known as Chitinase 3-like 1) is a glycoprotein produced by inflammatory, cancer and stem cells. Its physiological role is not completely understood but YKL-40 is elevated in the brain and cerebrospinal fluid (CSF) in several neurological and neurodegenerative diseases associated with inflammatory processes. Yet the precise characterization of YKL-40 in dementia cases is missing. Methods In the present study, we comparatively analysed YKL-40 levels in the brain and CSF samples from neurodegenerative dementias of different aetiologies characterized by the presence of cortical pathology and disease-specific neuroinflammatory signatures. Results YKL-40 was normally expressed in fibrillar astrocytes in the white matter. Additionally YKL-40 was highly and widely expressed in reactive protoplasmic cortical and perivascular astrocytes, and fibrillar astrocytes in sporadic Creutzfeldt-Jakob disease (sCJD). Elevated YKL-40 levels were also detected in Alzheimer’s disease (AD) but not in dementia with Lewy bodies (DLB). In AD, YKL-40-positive astrocytes were commonly found in clusters, often around β-amyloid plaques, and surrounding vessels with β-amyloid angiopathy; they were also distributed randomly in the cerebral cortex and white matter. YKL-40 overexpression appeared as a pre-clinical event as demonstrated in experimental models of prion diseases and AD pathology. CSF YKL-40 levels were measured in a cohort of 288 individuals, including neurological controls (NC) and patients diagnosed with different types of dementia. Compared to NC, increased YKL-40 levels were detected in sCJD (p < 0.001, AUC = 0.92) and AD (p < 0.001, AUC = 0.77) but not in vascular dementia (VaD) (p > 0.05, AUC = 0.71) or in DLB/Parkinson’s disease dementia (PDD) (p > 0.05, AUC = 0.70). Further, two independent patient cohorts were used to validate the increased CSF YKL-40 levels in sCJD. Additionally, increased YKL-40 levels were found in genetic prion diseases associated with the PRNP-D178N (Fatal Familial Insomnia) and PRNP-E200K mutations. Conclusions Our results unequivocally demonstrate that in neurodegenerative dementias, YKL-40 is a disease-specific marker of neuroinflammation showing its highest levels in prion diseases. Therefore, YKL-40 quantification might have a potential for application in the evaluation of therapeutic intervention in dementias with a neuroinflammatory component."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2017"],["dc.identifier.doi","10.1186/s13024-017-0226-4"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14995"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59135"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.intern","In goescholar not merged with http://resolver.sub.uni-goettingen.de/purl?gs-1/15151 but duplicate"],["dc.rights","CC BY 4.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","610"],["dc.title","YKL-40 in the brain and cerebrospinal fluid of neurodegenerative dementias"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","89"],["dc.bibliographiccitation.journal","Frontiers in neurology"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Garcia-Esparcia, Paula"],["dc.contributor.author","López-González, Irene"],["dc.contributor.author","Grau-Rivera, Oriol"],["dc.contributor.author","García-Garrido, María Francisca"],["dc.contributor.author","Konetti, Anusha"],["dc.contributor.author","Llorens, Franc"],["dc.contributor.author","Zafar, Saima"],["dc.contributor.author","Carmona, Margarita"],["dc.contributor.author","Del Rio, José Antonio"],["dc.contributor.author","Zerr, Inga"],["dc.contributor.author","Gelpi, Ellen"],["dc.contributor.author","Ferrer, Isidro"],["dc.date.accessioned","2019-07-09T11:44:52Z"],["dc.date.available","2019-07-09T11:44:52Z"],["dc.date.issued","2017"],["dc.description.abstract","OBJECTIVES: The goal of this study was to assess mitochondrial function, energy, and purine metabolism, protein synthesis machinery from the nucleolus to the ribosome, inflammation, and expression of newly identified ectopic olfactory receptors (ORs) and taste receptors (TASRs) in the frontal cortex of typical cases of dementia with Lewy bodies (DLB) and cases with rapid clinical course (rpDLB: 2 years or less) compared with middle-aged non-affected individuals, in order to learn about the biochemical abnormalities underlying Lewy body pathology. METHODS: Real-time quantitative PCR, mitochondrial enzymatic assays, and analysis of β-amyloid, tau, and synuclein species were used. RESULTS: The main alterations in DLB and rpDLB, which are more marked in the rapidly progressive forms, include (i) deregulated expression of several mRNAs and proteins of mitochondrial subunits, and reduced activity of complexes I, II, III, and IV of the mitochondrial respiratory chain; (ii) reduced expression of selected molecules involved in energy metabolism and increased expression of enzymes involved in purine metabolism; (iii) abnormal expression of nucleolar proteins, rRNA18S, genes encoding ribosomal proteins, and initiation factors of the transcription at the ribosome; (iv) discrete inflammation; and (v) marked deregulation of brain ORs and TASRs, respectively. Severe mitochondrial dysfunction involving activity of four complexes, minimal inflammatory responses, and dramatic altered expression of ORs and TASRs discriminate DLB from Alzheimer's disease. Altered solubility and aggregation of α-synuclein, increased β-amyloid bound to membranes, and absence of soluble tau oligomers are common in DLB and rpDLB. Low levels of soluble β-amyloid are found in DLB. However, increased soluble β-amyloid 1-40 and β-amyloid 1-42, and increased TNFα mRNA and protein expression, distinguish rpDLB. CONCLUSION: Molecular alterations in frontal cortex in DLB involve key biochemical pathways such as mitochondria and energy metabolism, protein synthesis, purine metabolism, among others and are accompanied by discrete innate inflammatory response."],["dc.identifier.doi","10.3389/fneur.2017.00089"],["dc.identifier.pmid","28348546"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14942"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59117"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1664-2295"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","610"],["dc.title","Dementia with Lewy Bodies: Molecular Pathology in the Frontal Cortex in Typical and Rapidly Progressive Forms."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]