title: Parkin and synphilin-1 isoform expression changes in Lewy body diseases.
abstract: Alternative splicing gives rise to at least seven parkin and eight synphilin-1 isoforms. Since both parkin and synphilin-1 have been involved in Lewy body (LB) formation, we decided to explore whether their isoforms are differentially expressed in LB diseases. With this aim, we studied relative mRNA expression levels of parkin and synphilin-1 isoforms in the frontal cortices of patients with dementia with LBs, the LB variant of Alzheimer's disease and Parkinson's disease and compared the findings with those obtained from Alzheimer's disease patients and control individuals. Duplex real-time PCR reactions, with beta-actin as internal standard, were carried out in a LightCycler. mRNA expression levels of parkin and synphilin-1 isoforms were seen to be specifically altered in each of the LB diseases studied. These findings suggest that parkin and synphilin-1 isoform expression changes play a significant role in the pathogenesis of LB diseases.
authors.affiliation: Departments of Pathology, Hospital Germans Trias i Pujol, Autonomous University of Barcelona, 08916 Badalona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Humbert
authors.forename: Katrin
authors.initials: K
authors.lastname: Beyer
authors.forename: Cristina
authors.initials: C
authors.lastname: Carrato
authors.forename: José L
authors.initials: JL
authors.lastname: Mate
authors.forename: Isidro
authors.initials: I
authors.lastname: Ferrer
authors.forename: Aurelio
authors.initials: A
authors.lastname: Ariza
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017398:Alternative Splicing / Q000235:genetics; D000544:Alzheimer Disease / Q000235:genetics* / Q000378:metabolism / Q000503:physiopathology; D001921:Brain / Q000378:metabolism / Q000503:physiopathology; D001923:Brain Chemistry / Q000235:genetics; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D018450:Disease Progression; D005260:Female; D005786:Gene Expression Regulation / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006801:Humans; D020961:Lewy Body Disease / Q000235:genetics* / Q000378:metabolism / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000235:genetics* / Q000378:metabolism; D010300:Parkinson Disease / Q000235:genetics* / Q000378:metabolism / Q000503:physiopathology; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D044767:Ubiquitin-Protein Ligases / Q000235:genetics* / Q000378:metabolism
chemical_list: D002352:Carrier Proteins; D005819:Genetic Markers; D009419:Nerve Tissue Proteins; D020033:Protein Isoforms; D012333:RNA, Messenger; C118958:SNCAIP protein, human; D044767:Ubiquitin-Protein Ligases; C111567:parkin protein